h264.c 315 KB
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/*
 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file libavcodec/h264.c
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 * H.264 / AVC / MPEG4 part10 codec.
 * @author Michael Niedermayer <michaelni@gmx.at>
 */

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#include "internal.h"
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#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
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#include "h264.h"
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#include "h264data.h"
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#include "h264_parser.h"
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#include "golomb.h"
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#include "mathops.h"
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#include "rectangle.h"
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#include "vdpau_internal.h"
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#include "cabac.h"
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#if ARCH_X86
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#include "x86/h264_i386.h"
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#endif
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//#undef NDEBUG
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#include <assert.h>

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/**
 * Value of Picture.reference when Picture is not a reference picture, but
 * is held for delayed output.
 */
#define DELAYED_PIC_REF 4

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static VLC coeff_token_vlc[4];
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static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
static const int coeff_token_vlc_tables_size[4]={520,332,280,256};

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static VLC chroma_dc_coeff_token_vlc;
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static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
static const int chroma_dc_coeff_token_vlc_table_size = 256;
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static VLC total_zeros_vlc[15];
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static VLC_TYPE total_zeros_vlc_tables[15][512][2];
static const int total_zeros_vlc_tables_size = 512;

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static VLC chroma_dc_total_zeros_vlc[3];
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static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
static const int chroma_dc_total_zeros_vlc_tables_size = 8;
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static VLC run_vlc[6];
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static VLC_TYPE run_vlc_tables[6][8][2];
static const int run_vlc_tables_size = 8;

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static VLC run7_vlc;
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static VLC_TYPE run7_vlc_table[96][2];
static const int run7_vlc_table_size = 96;
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static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
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static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
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static void filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
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static Picture * remove_long(H264Context *h, int i, int ref_mask);
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static av_always_inline uint32_t pack16to32(int a, int b){
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#ifdef WORDS_BIGENDIAN
   return (b&0xFFFF) + (a<<16);
#else
   return (a&0xFFFF) + (b<<16);
#endif
}

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static const uint8_t rem6[52]={
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0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
};

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static const uint8_t div6[52]={
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0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
};

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static const uint8_t left_block_options[4][8]={
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    {0,1,2,3,7,10,8,11},
    {2,2,3,3,8,11,8,11},
    {0,0,1,1,7,10,7,10},
    {0,2,0,2,7,10,7,10}
};
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#define LEVEL_TAB_BITS 8
static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2];

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static void fill_caches(H264Context *h, int mb_type, int for_deblock){
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    MpegEncContext * const s = &h->s;
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    const int mb_xy= h->mb_xy;
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    int topleft_xy, top_xy, topright_xy, left_xy[2];
    int topleft_type, top_type, topright_type, left_type[2];
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    const uint8_t * left_block;
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    int topleft_partition= -1;
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    int i;

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    top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);

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    //FIXME deblocking could skip the intra and nnz parts.
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    if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
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        return;

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    /* Wow, what a mess, why didn't they simplify the interlacing & intra
     * stuff, I can't imagine that these complex rules are worth it. */
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    topleft_xy = top_xy - 1;
    topright_xy= top_xy + 1;
    left_xy[1] = left_xy[0] = mb_xy-1;
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    left_block = left_block_options[0];
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    if(FRAME_MBAFF){
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        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
        const int top_pair_xy      = pair_xy     - s->mb_stride;
        const int topleft_pair_xy  = top_pair_xy - 1;
        const int topright_pair_xy = top_pair_xy + 1;
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        const int topleft_mb_field_flag  = IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
        const int top_mb_field_flag      = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
        const int topright_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
        const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
        const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
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        const int bottom = (s->mb_y & 1);
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        tprintf(s->avctx, "fill_caches: curr_mb_field_flag:%d, left_mb_field_flag:%d, topleft_mb_field_flag:%d, top_mb_field_flag:%d, topright_mb_field_flag:%d\n", curr_mb_field_flag, left_mb_field_flag, topleft_mb_field_flag, top_mb_field_flag, topright_mb_field_flag);
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        if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
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            top_xy -= s->mb_stride;
        }
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        if (curr_mb_field_flag && (bottom || topleft_mb_field_flag)){
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            topleft_xy -= s->mb_stride;
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        } else if(bottom && !curr_mb_field_flag && left_mb_field_flag) {
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            topleft_xy += s->mb_stride;
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            // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
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            topleft_partition = 0;
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        }
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        if (curr_mb_field_flag && (bottom || topright_mb_field_flag)){
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            topright_xy -= s->mb_stride;
        }
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        if (left_mb_field_flag != curr_mb_field_flag) {
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            left_xy[1] = left_xy[0] = pair_xy - 1;
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            if (curr_mb_field_flag) {
                left_xy[1] += s->mb_stride;
                left_block = left_block_options[3];
            } else {
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                left_block= left_block_options[2 - bottom];
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            }
        }
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    }

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    h->top_mb_xy = top_xy;
    h->left_mb_xy[0] = left_xy[0];
    h->left_mb_xy[1] = left_xy[1];
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    if(for_deblock){
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        topleft_type = 0;
        topright_type = 0;
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        top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
        left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
        left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
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        if(MB_MBAFF && !IS_INTRA(mb_type)){
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            int list;
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            for(list=0; list<h->list_count; list++){
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                //These values where changed for ease of performing MC, we need to change them back
                //FIXME maybe we can make MC and loop filter use the same values or prevent
                //the MC code from changing ref_cache and rather use a temporary array.
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                if(USES_LIST(mb_type,list)){
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                    int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
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                    *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
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                    *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
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                    ref += h->b8_stride;
                    *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
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                    *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
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                }
            }
        }
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    }else{
        topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
        top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
        topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
        left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
        left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
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    if(IS_INTRA(mb_type)){
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        int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
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        h->topleft_samples_available=
        h->top_samples_available=
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        h->left_samples_available= 0xFFFF;
        h->topright_samples_available= 0xEEEA;

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        if(!(top_type & type_mask)){
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            h->topleft_samples_available= 0xB3FF;
            h->top_samples_available= 0x33FF;
            h->topright_samples_available= 0x26EA;
        }
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        if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
            if(IS_INTERLACED(mb_type)){
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                if(!(left_type[0] & type_mask)){
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                    h->topleft_samples_available&= 0xDFFF;
                    h->left_samples_available&= 0x5FFF;
                }
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                if(!(left_type[1] & type_mask)){
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                    h->topleft_samples_available&= 0xFF5F;
                    h->left_samples_available&= 0xFF5F;
                }
            }else{
                int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
                                ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
                assert(left_xy[0] == left_xy[1]);
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                if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
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                    h->topleft_samples_available&= 0xDF5F;
                    h->left_samples_available&= 0x5F5F;
                }
            }
        }else{
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            if(!(left_type[0] & type_mask)){
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                h->topleft_samples_available&= 0xDF5F;
                h->left_samples_available&= 0x5F5F;
            }
        }
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        if(!(topleft_type & type_mask))
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            h->topleft_samples_available&= 0x7FFF;
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        if(!(topright_type & type_mask))
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            h->topright_samples_available&= 0xFBFF;
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        if(IS_INTRA4x4(mb_type)){
            if(IS_INTRA4x4(top_type)){
                h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
                h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
                h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
                h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
            }else{
                int pred;
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                if(!(top_type & type_mask))
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                    pred= -1;
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                else{
                    pred= 2;
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                }
                h->intra4x4_pred_mode_cache[4+8*0]=
                h->intra4x4_pred_mode_cache[5+8*0]=
                h->intra4x4_pred_mode_cache[6+8*0]=
                h->intra4x4_pred_mode_cache[7+8*0]= pred;
            }
            for(i=0; i<2; i++){
                if(IS_INTRA4x4(left_type[i])){
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
                }else{
                    int pred;
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                    if(!(left_type[i] & type_mask))
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                        pred= -1;
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                    else{
                        pred= 2;
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                    }
                    h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
                    h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
                }
            }
        }
    }
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    }
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/*
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0 . T T. T T T T
1 L . .L . . . .
2 L . .L . . . .
3 . T TL . . . .
4 L . .L . . . .
5 L . .. . . . .
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*/
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//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
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    if(top_type){
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        h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
        h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
        h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
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        h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
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        h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
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        h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
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        h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
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        h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
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    }else{
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        h->non_zero_count_cache[4+8*0]=
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        h->non_zero_count_cache[5+8*0]=
        h->non_zero_count_cache[6+8*0]=
        h->non_zero_count_cache[7+8*0]=
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        h->non_zero_count_cache[1+8*0]=
        h->non_zero_count_cache[2+8*0]=
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        h->non_zero_count_cache[1+8*3]=
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        h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
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    }
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    for (i=0; i<2; i++) {
        if(left_type[i]){
            h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
            h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
            h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
            h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
        }else{
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            h->non_zero_count_cache[3+8*1 + 2*8*i]=
            h->non_zero_count_cache[3+8*2 + 2*8*i]=
            h->non_zero_count_cache[0+8*1 +   8*i]=
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            h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
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        }
    }

    if( h->pps.cabac ) {
        // top_cbp
        if(top_type) {
            h->top_cbp = h->cbp_table[top_xy];
        } else if(IS_INTRA(mb_type)) {
            h->top_cbp = 0x1C0;
        } else {
            h->top_cbp = 0;
        }
        // left_cbp
        if (left_type[0]) {
            h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
        } else if(IS_INTRA(mb_type)) {
            h->left_cbp = 0x1C0;
        } else {
            h->left_cbp = 0;
        }
        if (left_type[0]) {
            h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
        }
        if (left_type[1]) {
            h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
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        }
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    }
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#if 1
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    if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
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        int list;
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        for(list=0; list<h->list_count; list++){
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            if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
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                /*if(!h->mv_cache_clean[list]){
                    memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
                    memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
                    h->mv_cache_clean[list]= 1;
                }*/
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                continue;
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            }
            h->mv_cache_clean[list]= 0;
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            if(USES_LIST(top_type, list)){
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                const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
                const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
                *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
                *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
                *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
                *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
                h->ref_cache[list][scan8[0] + 0 - 1*8]=
                h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
                h->ref_cache[list][scan8[0] + 2 - 1*8]=
                h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
            }else{
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                *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
                *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
                *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
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                *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
                *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
            }

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            for(i=0; i<2; i++){
                int cache_idx = scan8[0] - 1 + i*2*8;
                if(USES_LIST(left_type[i], list)){
                    const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
                    const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
                    *(uint32_t*)h->mv_cache[list][cache_idx  ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]];
                    *(uint32_t*)h->mv_cache[list][cache_idx+8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]];
                    h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
                    h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
                }else{
                    *(uint32_t*)h->mv_cache [list][cache_idx  ]=
                    *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
                    h->ref_cache[list][cache_idx  ]=
                    h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
                }
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            }

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            if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
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                continue;

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            if(USES_LIST(topleft_type, list)){
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                const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
                const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
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                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
                h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
            }else{
                *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
                h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
            }
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            if(USES_LIST(topright_type, list)){
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                const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
                const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
                *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
                h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
            }else{
                *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
                h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
            }

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            if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
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                continue;
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            h->ref_cache[list][scan8[5 ]+1] =
            h->ref_cache[list][scan8[7 ]+1] =
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            h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
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            h->ref_cache[list][scan8[4 ]] =
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            h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
            *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
            *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
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            *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
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            *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
            *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
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            if( h->pps.cabac ) {
                /* XXX beurk, Load mvd */
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                if(USES_LIST(top_type, list)){
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                    const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
                    *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
                }else{
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                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
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                    *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
                }
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                if(USES_LIST(left_type[0], list)){
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                    const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 0*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[0]];
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[1]];
                }else{
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
                }
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                if(USES_LIST(left_type[1], list)){
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                    const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 2*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[2]];
                    *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 3*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[3]];
                }else{
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
                    *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
                }
                *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
                *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
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                *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
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                *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
                *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
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                if(h->slice_type_nos == FF_B_TYPE){
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                    fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);

                    if(IS_DIRECT(top_type)){
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
                    }else if(IS_8X8(top_type)){
                        int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
                        h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
                        h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
                    }else{
                        *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
                    }
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                    if(IS_DIRECT(left_type[0]))
                        h->direct_cache[scan8[0] - 1 + 0*8]= 1;
                    else if(IS_8X8(left_type[0]))
                        h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[h->mb2b8_xy[left_xy[0]] + 1 + h->b8_stride*(left_block[0]>>1)];
                    else
                        h->direct_cache[scan8[0] - 1 + 0*8]= 0;

                    if(IS_DIRECT(left_type[1]))
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                        h->direct_cache[scan8[0] - 1 + 2*8]= 1;
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                    else if(IS_8X8(left_type[1]))
                        h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[h->mb2b8_xy[left_xy[1]] + 1 + h->b8_stride*(left_block[2]>>1)];
                    else
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                        h->direct_cache[scan8[0] - 1 + 2*8]= 0;
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                }
            }

            if(FRAME_MBAFF){
#define MAP_MVS\
                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
                if(MB_FIELD){
#define MAP_F2F(idx, mb_type)\
                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
                        h->ref_cache[list][idx] <<= 1;\
                        h->mv_cache[list][idx][1] /= 2;\
                        h->mvd_cache[list][idx][1] /= 2;\
                    }
                    MAP_MVS
#undef MAP_F2F
                }else{
#define MAP_F2F(idx, mb_type)\
                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
                        h->ref_cache[list][idx] >>= 1;\
                        h->mv_cache[list][idx][1] <<= 1;\
                        h->mvd_cache[list][idx][1] <<= 1;\
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                    }
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                    MAP_MVS
#undef MAP_F2F
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                }
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            }
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        }
    }
#endif
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    h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
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}

static inline void write_back_intra_pred_mode(H264Context *h){
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    const int mb_xy= h->mb_xy;
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    h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
    h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
    h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
    h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
    h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
    h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
    h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
}

/**
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 */
static inline int check_intra4x4_pred_mode(H264Context *h){
    MpegEncContext * const s = &h->s;
    static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
    static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
    int i;
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    if(!(h->top_samples_available&0x8000)){
        for(i=0; i<4; i++){
            int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
            if(status<0){
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                av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
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                return -1;
            } else if(status){
                h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
            }
        }
    }
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    if((h->left_samples_available&0x8888)!=0x8888){
        static const int mask[4]={0x8000,0x2000,0x80,0x20};
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        for(i=0; i<4; i++){
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            if(!(h->left_samples_available&mask[i])){
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                int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
                if(status<0){
                    av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
                    return -1;
                } else if(status){
                    h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
                }
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            }
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        }
    }

    return 0;
} //FIXME cleanup like next

/**
 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 */
static inline int check_intra_pred_mode(H264Context *h, int mode){
    MpegEncContext * const s = &h->s;
    static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
    static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
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    if(mode > 6U) {
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        av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
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        return -1;
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    }
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    if(!(h->top_samples_available&0x8000)){
        mode= top[ mode ];
        if(mode<0){
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            av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
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            return -1;
        }
    }
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    if((h->left_samples_available&0x8080) != 0x8080){
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        mode= left[ mode ];
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        if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
            mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
        }
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        if(mode<0){
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            av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
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            return -1;
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        }
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    }

    return mode;
}

/**
 * gets the predicted intra4x4 prediction mode.
 */
static inline int pred_intra_mode(H264Context *h, int n){
    const int index8= scan8[n];
    const int left= h->intra4x4_pred_mode_cache[index8 - 1];
    const int top = h->intra4x4_pred_mode_cache[index8 - 8];
    const int min= FFMIN(left, top);

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    tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
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    if(min<0) return DC_PRED;
    else      return min;
}

static inline void write_back_non_zero_count(H264Context *h){
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    const int mb_xy= h->mb_xy;
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    h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
    h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
    h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
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    h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
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    h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
    h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
    h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
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    h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
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    h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
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    h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
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    h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
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    h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
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    h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
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}

/**
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 * gets the predicted number of non-zero coefficients.
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 * @param n block index
 */
static inline int pred_non_zero_count(H264Context *h, int n){
    const int index8= scan8[n];
    const int left= h->non_zero_count_cache[index8 - 1];
    const int top = h->non_zero_count_cache[index8 - 8];
    int i= left + top;
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    if(i<64) i= (i+1)>>1;

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    tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
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    return i&31;
}

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static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
    const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
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    MpegEncContext *s = &h->s;
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    /* there is no consistent mapping of mvs to neighboring locations that will
     * make mbaff happy, so we can't move all this logic to fill_caches */
    if(FRAME_MBAFF){
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        const uint32_t *mb_types = s->current_picture_ptr->mb_type;
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        const int16_t *mv;
        *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
        *C = h->mv_cache[list][scan8[0]-2];

        if(!MB_FIELD
           && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
            int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
            if(IS_INTERLACED(mb_types[topright_xy])){
#define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
                const int x4 = X4, y4 = Y4;\
                const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
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                if(!USES_LIST(mb_type,list))\
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                    return LIST_NOT_USED;\
                mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
                h->mv_cache[list][scan8[0]-2][0] = mv[0];\
                h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
                return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;

                SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
            }
        }
        if(topright_ref == PART_NOT_AVAILABLE
           && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
           && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
            if(!MB_FIELD
               && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
                SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
            }
            if(MB_FIELD
               && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
               && i >= scan8[0]+8){
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                // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
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                SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
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            }
        }
#undef SET_DIAG_MV
    }

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    if(topright_ref != PART_NOT_AVAILABLE){
        *C= h->mv_cache[list][ i - 8 + part_width ];
        return topright_ref;
    }else{
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        tprintf(s->avctx, "topright MV not available\n");
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        *C= h->mv_cache[list][ i - 8 - 1 ];
        return h->ref_cache[list][ i - 8 - 1 ];
    }
}

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/**
 * gets the predicted MV.
 * @param n the block index
 * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
 * @param mx the x component of the predicted motion vector
 * @param my the y component of the predicted motion vector
 */
static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
    const int index8= scan8[n];
    const int top_ref=      h->ref_cache[list][ index8 - 8 ];
    const int left_ref=     h->ref_cache[list][ index8 - 1 ];
    const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
    const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
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    const int16_t * C;
    int diagonal_ref, match_count;

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    assert(part_width==1 || part_width==2 || part_width==4);
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/* mv_cache
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  B . . A T T T T
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  U . . L . . , .
  U . . L . . . .
  U . . L . . , .
  . . . L . . . .
*/
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    diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
    match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
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    tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
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    if(match_count > 1){ //most common
        *mx= mid_pred(A[0], B[0], C[0]);
        *my= mid_pred(A[1], B[1], C[1]);
    }else if(match_count==1){
        if(left_ref==ref){
            *mx= A[0];
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            *my= A[1];
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        }else if(top_ref==ref){
            *mx= B[0];
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            *my= B[1];
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        }else{
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            *mx= C[0];
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            *my= C[1];
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        }
    }else{
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        if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
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            *mx= A[0];
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            *my= A[1];
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        }else{
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            *mx= mid_pred(A[0], B[0], C[0]);
            *my= mid_pred(A[1], B[1], C[1]);
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        }
    }
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    tprintf(h->s.avctx, "pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1],                    diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, h->s.mb_x, h->s.mb_y, n, list);
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}

/**
 * gets the directionally predicted 16x8 MV.
 * @param n the block index
 * @param mx the x component of the predicted motion vector
 * @param my the y component of the predicted motion vector
 */
static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
    if(n==0){
        const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
        const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];

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        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], h->s.mb_x, h->s.mb_y, n, list);
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        if(top_ref == ref){
            *mx= B[0];
            *my= B[1];
            return;
        }
    }else{
        const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
        const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
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        tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
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        if(left_ref == ref){
            *mx= A[0];
            *my= A[1];
            return;
        }
    }

    //RARE
    pred_motion(h, n, 4, list, ref, mx, my);
}

/**
 * gets the directionally predicted 8x16 MV.
 * @param n the block index
 * @param mx the x component of the predicted motion vector
 * @param my the y component of the predicted motion vector
 */
static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
    if(n==0){
        const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
        const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
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        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
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        if(left_ref == ref){
            *mx= A[0];
            *my= A[1];
            return;
        }
    }else{
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        const int16_t * C;
        int diagonal_ref;

        diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
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        tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", diagonal_ref, C[0], C[1], h->s.mb_x, h->s.mb_y, n, list);
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        if(diagonal_ref == ref){
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            *mx= C[0];
            *my= C[1];
            return;
        }
    }

    //RARE
    pred_motion(h, n, 2, list, ref, mx, my);
}

static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
    const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
    const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];

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    tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
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    if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
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       || !( top_ref | *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ])
       || !(left_ref | *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ])){
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        *mx = *my = 0;
        return;
    }
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    pred_motion(h, 0, 4, 0, 0, mx, my);

    return;
}

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static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
    int poc0 = h->ref_list[0][i].poc;
    int td = av_clip(poc1 - poc0, -128, 127);
    if(td == 0 || h->ref_list[0][i].long_ref){
        return 256;
    }else{
        int tb = av_clip(poc - poc0, -128, 127);
        int tx = (16384 + (FFABS(td) >> 1)) / td;
        return av_clip((tb*tx + 32) >> 6, -1024, 1023);
    }
}

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static inline void direct_dist_scale_factor(H264Context * const h){
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    MpegEncContext * const s = &h->s;
    const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
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    const int poc1 = h->ref_list[1][0].poc;
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    int i, field;
    for(field=0; field<2; field++){
        const int poc  = h->s.current_picture_ptr->field_poc[field];
        const int poc1 = h->ref_list[1][0].field_poc[field];
        for(i=0; i < 2*h->ref_count[0]; i++)
            h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
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    }
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    for(i=0; i<h->ref_count[0]; i++){
        h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
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    }
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}
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static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
    MpegEncContext * const s = &h->s;
    Picture * const ref1 = &h->ref_list[1][0];
    int j, old_ref, rfield;
    int start= mbafi ? 16                      : 0;
    int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
    int interl= mbafi || s->picture_structure != PICT_FRAME;

    /* bogus; fills in for missing frames */
    memset(map[list], 0, sizeof(map[list]));

    for(rfield=0; rfield<2; rfield++){
        for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
            int poc = ref1->ref_poc[colfield][list][old_ref];

            if     (!interl)
                poc |= 3;
            else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
                poc= (poc&~3) + rfield + 1;

            for(j=start; j<end; j++){
                if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
                    int cur_ref= mbafi ? (j-16)^field : j;
                    map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
                    if(rfield == field)
                        map[list][old_ref] = cur_ref;
                    break;
                }
            }
        }
    }
}

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static inline void direct_ref_list_init(H264Context * const h){
    MpegEncContext * const s = &h->s;
    Picture * const ref1 = &h->ref_list[1][0];
    Picture * const cur = s->current_picture_ptr;
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    int list, j, field;
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    int sidx= (s->picture_structure&1)^1;
    int ref1sidx= (ref1->reference&1)^1;
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    for(list=0; list<2; list++){
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        cur->ref_count[sidx][list] = h->ref_count[list];
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        for(j=0; j<h->ref_count[list]; j++)
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            cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
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    }
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    if(s->picture_structure == PICT_FRAME){
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        memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
        memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
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    }
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    cur->mbaff= FRAME_MBAFF;
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    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
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        return;
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    for(list=0; list<2; list++){
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        fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
        for(field=0; field<2; field++)
            fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
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    }
}
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static inline void pred_direct_motion(H264Context * const h, int *mb_type){
    MpegEncContext * const s = &h->s;
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    int b8_stride = h->b8_stride;
    int b4_stride = h->b_stride;
    int mb_xy = h->mb_xy;
    int mb_type_col[2];
    const int16_t (*l1mv0)[2], (*l1mv1)[2];
    const int8_t *l1ref0, *l1ref1;
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    const int is_b8x8 = IS_8X8(*mb_type);
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    unsigned int sub_mb_type;
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    int i8, i4;

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#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
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    if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
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        if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
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            int cur_poc = s->current_picture_ptr->poc;
            int *col_poc = h->ref_list[1]->field_poc;
            int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
            mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
            b8_stride = 0;
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        }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
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            int fieldoff= 2*(h->ref_list[1][0].reference)-3;
            mb_xy += s->mb_stride*fieldoff;
        }
        goto single_col;
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
            mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
            b8_stride *= 3;
            b4_stride *= 6;
            //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
                && !is_b8x8){
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
            }else{
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
            }
        }else{                                           //     AFR/FR    -> AFR/FR
single_col:
            mb_type_col[0] =
            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
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            if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
                /* FIXME save sub mb types from previous frames (or derive from MVs)
                * so we know exactly what block size to use */
                sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
            }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
                *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
            }else{
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
            }
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        }
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    }

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    l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
    l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
    l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
    l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
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    if(!b8_stride){
        if(s->mb_y&1){
            l1ref0 += h->b8_stride;
            l1ref1 += h->b8_stride;
            l1mv0  +=  2*b4_stride;
            l1mv1  +=  2*b4_stride;
        }
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    }
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    if(h->direct_spatial_mv_pred){
        int ref[2];
        int mv[2][2];
        int list;

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        /* FIXME interlacing + spatial direct uses wrong colocated block positions */

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        /* ref = min(neighbors) */
        for(list=0; list<2; list++){
            int refa = h->ref_cache[list][scan8[0] - 1];
            int refb = h->ref_cache[list][scan8[0] - 8];
            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
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            if(refc == PART_NOT_AVAILABLE)
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                refc = h->ref_cache[list][scan8[0] - 8 - 1];
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            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
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            if(ref[list] < 0)
                ref[list] = -1;
        }

        if(ref[0] < 0 && ref[1] < 0){
            ref[0] = ref[1] = 0;
            mv[0][0] = mv[0][1] =
            mv[1][0] = mv[1][1] = 0;
        }else{
            for(list=0; list<2; list++){
                if(ref[list] >= 0)
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
                else
                    mv[list][0] = mv[list][1] = 0;
            }
        }

        if(ref[1] < 0){
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            if(!is_b8x8)
                *mb_type &= ~MB_TYPE_L1;
            sub_mb_type &= ~MB_TYPE_L1;
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        }else if(ref[0] < 0){
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            if(!is_b8x8)
                *mb_type &= ~MB_TYPE_L0;
            sub_mb_type &= ~MB_TYPE_L0;
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        }

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        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
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            for(i8=0; i8<4; i8++){
                int x8 = i8&1;
                int y8 = i8>>1;
                int xy8 = x8+y8*b8_stride;
                int xy4 = 3*x8+y8*b4_stride;
                int a=0, b=0;

                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                    continue;
                h->sub_mb_type[i8] = sub_mb_type;

                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
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                if(!IS_INTRA(mb_type_col[y8])
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                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
                    if(ref[0] > 0)
                        a= pack16to32(mv[0][0],mv[0][1]);
                    if(ref[1] > 0)
                        b= pack16to32(mv[1][0],mv[1][1]);
                }else{
                    a= pack16to32(mv[0][0],mv[0][1]);
                    b= pack16to32(mv[1][0],mv[1][1]);
                }
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
            }
        }else if(IS_16X16(*mb_type)){
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            int a=0, b=0;

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            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1134
            if(!IS_INTRA(mb_type_col[0])
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               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
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1137
                       && (h->x264_build>33 || !h->x264_build)))){
1138
                if(ref[0] > 0)
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1139
                    a= pack16to32(mv[0][0],mv[0][1]);
1140
                if(ref[1] > 0)
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                    b= pack16to32(mv[1][0],mv[1][1]);
1142
            }else{
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                a= pack16to32(mv[0][0],mv[0][1]);
                b= pack16to32(mv[1][0],mv[1][1]);
1145
            }
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            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
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        }else{
            for(i8=0; i8<4; i8++){
                const int x8 = i8&1;
                const int y8 = i8>>1;
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                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                    continue;
                h->sub_mb_type[i8] = sub_mb_type;
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                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
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                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1161

1162
                /* col_zero_flag */
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                if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
                                              || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
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                                                  && (h->x264_build>33 || !h->x264_build)))){
1166
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
1167
                    if(IS_SUB_8X8(sub_mb_type)){
1168
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
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1169
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
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                            if(ref[0] == 0)
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
                            if(ref[1] == 0)
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
                        }
                    }else
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                    for(i4=0; i4<4; i4++){
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                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
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                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
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                            if(ref[0] == 0)
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
                            if(ref[1] == 0)
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
                        }
                    }
                }
            }
        }
    }else{ /* direct temporal mv pred */
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        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
        const int *dist_scale_factor = h->dist_scale_factor;
1191
        int ref_offset= 0;
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        if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
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            map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
            map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
            dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
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1197
        }
1198
        if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
1199
            ref_offset += 16;
1200

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        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
            /* FIXME assumes direct_8x8_inference == 1 */
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            int y_shift  = 2*!IS_INTERLACED(*mb_type);
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            for(i8=0; i8<4; i8++){
                const int x8 = i8&1;
                const int y8 = i8>>1;
                int ref0, scale;
                const int16_t (*l1mv)[2]= l1mv0;
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                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                    continue;
                h->sub_mb_type[i8] = sub_mb_type;

                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
                if(IS_INTRA(mb_type_col[y8])){
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
                    continue;
                }

                ref0 = l1ref0[x8 + y8*b8_stride];
                if(ref0 >= 0)
1225
                    ref0 = map_col_to_list0[0][ref0 + ref_offset];
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                else{
1227
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
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                    l1mv= l1mv1;
                }
                scale = dist_scale_factor[ref0];
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);

                {
                    const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
                    int my_col = (mv_col[1]<<y_shift)/2;
                    int mx = (scale * mv_col[0] + 128) >> 8;
                    int my = (scale * my_col + 128) >> 8;
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
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                }
            }
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            return;
        }
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        /* one-to-one mv scaling */

1247
        if(IS_16X16(*mb_type)){
1248 1249
            int ref, mv0, mv1;

1250
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1251
            if(IS_INTRA(mb_type_col[0])){
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                ref=mv0=mv1=0;
1253
            }else{
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                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
                                                : map_col_to_list0[1][l1ref1[0] + ref_offset];
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                const int scale = dist_scale_factor[ref0];
1257
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1258
                int mv_l0[2];
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                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1261 1262 1263
                ref= ref0;
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
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            }
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            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
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        }else{
            for(i8=0; i8<4; i8++){
                const int x8 = i8&1;
                const int y8 = i8>>1;
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                int ref0, scale;
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                const int16_t (*l1mv)[2]= l1mv0;
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                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
                    continue;
                h->sub_mb_type[i8] = sub_mb_type;
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                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1279
                if(IS_INTRA(mb_type_col[0])){
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                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
                    continue;
                }
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1286
                ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
1287
                if(ref0 >= 0)
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                    ref0 = map_col_to_list0[0][ref0];
1289
                else{
1290
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1291 1292
                    l1mv= l1mv1;
                }
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                scale = dist_scale_factor[ref0];
1294

1295
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1296
                if(IS_SUB_8X8(sub_mb_type)){
1297
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
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                    int mx = (scale * mv_col[0] + 128) >> 8;
                    int my = (scale * mv_col[1] + 128) >> 8;
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                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
                }else
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                for(i4=0; i4<4; i4++){
1304
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1305
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
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                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
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                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
                }
            }
        }
    }
}

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static inline void write_back_motion(H264Context *h, int mb_type){
    MpegEncContext * const s = &h->s;
    const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
    const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
    int list;

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    if(!USES_LIST(mb_type, 0))
        fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);

1325
    for(list=0; list<h->list_count; list++){
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        int y;
1327
        if(!USES_LIST(mb_type, list))
1328
            continue;
1329

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        for(y=0; y<4; y++){
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y];
            *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y];
        }
1334
        if( h->pps.cabac ) {
1335 1336 1337
            if(IS_SKIP(mb_type))
                fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
            else
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            for(y=0; y<4; y++){
                *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
                *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
            }
        }
1343 1344

        {
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1345
            int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1346 1347 1348 1349
            ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
            ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
            ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
            ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
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        }
    }
1352

1353
    if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1354
        if(IS_8X8(mb_type)){
1355 1356 1357 1358
            uint8_t *direct_table = &h->direct_table[b8_xy];
            direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
            direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
            direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1359 1360
        }
    }
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}

1363
const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
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    int i, si, di;
    uint8_t *dst;
1366
    int bufidx;
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1368
//    src[0]&0x80;                //forbidden bit
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    h->nal_ref_idc= src[0]>>5;
    h->nal_unit_type= src[0]&0x1F;

    src++; length--;
1373
#if 0
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    for(i=0; i<length; i++)
        printf("%2X ", src[i]);
#endif
1377

1378 1379
#if HAVE_FAST_UNALIGNED
# if HAVE_FAST_64BIT
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#   define RS 7
    for(i=0; i+1<length; i+=9){
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        if(!((~*(const uint64_t*)(src+i) & (*(const uint64_t*)(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
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# else
#   define RS 3
    for(i=0; i+1<length; i+=5){
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        if(!((~*(const uint32_t*)(src+i) & (*(const uint32_t*)(src+i) - 0x01000101U)) & 0x80008080U))
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# endif
            continue;
        if(i>0 && !src[i]) i--;
        while(src[i]) i++;
#else
#   define RS 0
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    for(i=0; i+1<length; i+=2){
        if(src[i]) continue;
        if(i>0 && src[i-1]==0) i--;
1396
#endif
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        if(i+2<length && src[i+1]==0 && src[i+2]<=3){
            if(src[i+2]!=3){
                /* startcode, so we must be past the end */
                length=i;
            }
            break;
        }
1404
        i-= RS;
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    }

    if(i>=length-1){ //no escaped 0
        *dst_length= length;
        *consumed= length+1; //+1 for the header
1410
        return src;
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    }

1413
    bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1414
    h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
1415
    dst= h->rbsp_buffer[bufidx];
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    if (dst == NULL){
        return NULL;
    }

1421
//printf("decoding esc\n");
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    memcpy(dst, src, i);
    si=di=i;
    while(si+2<length){
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        //remove escapes (very rare 1:2^22)
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        if(src[si+2]>3){
            dst[di++]= src[si++];
            dst[di++]= src[si++];
        }else if(src[si]==0 && src[si+1]==0){
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            if(src[si+2]==3){ //escape
                dst[di++]= 0;
                dst[di++]= 0;
                si+=3;
1434
                continue;
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            }else //next start code
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                goto nsc;
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        }

        dst[di++]= src[si++];
    }
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    while(si<length)
        dst[di++]= src[si++];
nsc:
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    memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);

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    *dst_length= di;
    *consumed= si + 1;//+1 for the header
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//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
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    return dst;
}

1453
int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
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    int v= *src;
    int r;

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    tprintf(h->s.avctx, "rbsp trailing %X\n", v);
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    for(r=1; r<9; r++){
        if(v&1) return r;
        v>>=1;
    }
    return 0;
}

/**
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 * IDCT transforms the 16 dc values and dequantizes them.
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 * @param qp quantization parameter
 */
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static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
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#define stride 16
    int i;
    int temp[16]; //FIXME check if this is a good idea
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};

//memset(block, 64, 2*256);
//return;
    for(i=0; i<4; i++){
        const int offset= y_offset[i];
        const int z0= block[offset+stride*0] + block[offset+stride*4];
        const int z1= block[offset+stride*0] - block[offset+stride*4];
        const int z2= block[offset+stride*1] - block[offset+stride*5];
        const int z3= block[offset+stride*1] + block[offset+stride*5];

        temp[4*i+0]= z0+z3;
        temp[4*i+1]= z1+z2;
        temp[4*i+2]= z1-z2;
        temp[4*i+3]= z0-z3;
    }

    for(i=0; i<4; i++){
        const int offset= x_offset[i];
        const int z0= temp[4*0+i] + temp[4*2+i];
        const int z1= temp[4*0+i] - temp[4*2+i];
        const int z2= temp[4*1+i] - temp[4*3+i];
        const int z3= temp[4*1+i] + temp[4*3+i];

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        block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
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        block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
        block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
        block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
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    }
}

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#if 0
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/**
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 * DCT transforms the 16 dc values.
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 * @param qp quantization parameter ??? FIXME
 */
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
//    const int qmul= dequant_coeff[qp][0];
    int i;
    int temp[16]; //FIXME check if this is a good idea
    static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
    static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};

    for(i=0; i<4; i++){
        const int offset= y_offset[i];
        const int z0= block[offset+stride*0] + block[offset+stride*4];
        const int z1= block[offset+stride*0] - block[offset+stride*4];
        const int z2= block[offset+stride*1] - block[offset+stride*5];
        const int z3= block[offset+stride*1] + block[offset+stride*5];

        temp[4*i+0]= z0+z3;
        temp[4*i+1]= z1+z2;
        temp[4*i+2]= z1-z2;
        temp[4*i+3]= z0-z3;
    }

    for(i=0; i<4; i++){
        const int offset= x_offset[i];
        const int z0= temp[4*0+i] + temp[4*2+i];
        const int z1= temp[4*0+i] - temp[4*2+i];
        const int z2= temp[4*1+i] - temp[4*3+i];
        const int z3= temp[4*1+i] + temp[4*3+i];

        block[stride*0 +offset]= (z0 + z3)>>1;
        block[stride*2 +offset]= (z1 + z2)>>1;
        block[stride*8 +offset]= (z1 - z2)>>1;
        block[stride*10+offset]= (z0 - z3)>>1;
    }
}
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#endif

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#undef xStride
#undef stride

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static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
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    const int stride= 16*2;
    const int xStride= 16;
    int a,b,c,d,e;

    a= block[stride*0 + xStride*0];
    b= block[stride*0 + xStride*1];
    c= block[stride*1 + xStride*0];
    d= block[stride*1 + xStride*1];

    e= a-b;
    a= a+b;
    b= c-d;
    c= c+d;

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    block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
    block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
    block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
    block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
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}

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#if 0
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static void chroma_dc_dct_c(DCTELEM *block){
    const int stride= 16*2;
    const int xStride= 16;
    int a,b,c,d,e;

    a= block[stride*0 + xStride*0];
    b= block[stride*0 + xStride*1];
    c= block[stride*1 + xStride*0];
    d= block[stride*1 + xStride*1];

    e= a-b;
    a= a+b;
    b= c-d;
    c= c+d;

    block[stride*0 + xStride*0]= (a+c);
    block[stride*0 + xStride*1]= (e+b);
    block[stride*1 + xStride*0]= (a-c);
    block[stride*1 + xStride*1]= (e-b);
}
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#endif
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/**
 * gets the chroma qp.
 */
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static inline int get_chroma_qp(H264Context *h, int t, int qscale){
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    return h->pps.chroma_qp_table[t][qscale];
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}

static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                           int src_x_offset, int src_y_offset,
                           qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
    MpegEncContext * const s = &h->s;
    const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
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    int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
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    const int luma_xy= (mx&3) + ((my&3)<<2);
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    uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
    uint8_t * src_cb, * src_cr;
    int extra_width= h->emu_edge_width;
    int extra_height= h->emu_edge_height;
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    int emu=0;
    const int full_mx= mx>>2;
    const int full_my= my>>2;
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    const int pic_width  = 16*s->mb_width;
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    const int pic_height = 16*s->mb_height >> MB_FIELD;
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    if(mx&7) extra_width -= 3;
    if(my&7) extra_height -= 3;
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    if(   full_mx < 0-extra_width
       || full_my < 0-extra_height
       || full_mx + 16/*FIXME*/ > pic_width + extra_width
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       || full_my + 16/*FIXME*/ > pic_height + extra_height){
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        ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
            src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
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        emu=1;
    }
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    qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
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    if(!square){
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        qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
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    }
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    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
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    if(MB_FIELD){
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        // chroma offset when predicting from a field of opposite parity
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        my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
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        emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
    }
    src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
    src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;

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    if(emu){
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        ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
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            src_cb= s->edge_emu_buffer;
    }
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    chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
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    if(emu){
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        ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
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            src_cr= s->edge_emu_buffer;
    }
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    chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
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}

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static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
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                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                           int x_offset, int y_offset,
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
                           int list0, int list1){
    MpegEncContext * const s = &h->s;
    qpel_mc_func *qpix_op=  qpix_put;
    h264_chroma_mc_func chroma_op= chroma_put;
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    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
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    x_offset += 8*s->mb_x;
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    y_offset += 8*(s->mb_y >> MB_FIELD);
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    if(list0){
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        Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
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        mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
                           qpix_op, chroma_op);

        qpix_op=  qpix_avg;
        chroma_op= chroma_avg;
    }

    if(list1){
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        Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
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        mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
                           dest_y, dest_cb, dest_cr, x_offset, y_offset,
                           qpix_op, chroma_op);
    }
}

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static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                           int x_offset, int y_offset,
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
                           h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
                           h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
                           int list0, int list1){
    MpegEncContext * const s = &h->s;

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    dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
    dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
    dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
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    x_offset += 8*s->mb_x;
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    y_offset += 8*(s->mb_y >> MB_FIELD);
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    if(list0 && list1){
        /* don't optimize for luma-only case, since B-frames usually
         * use implicit weights => chroma too. */
        uint8_t *tmp_cb = s->obmc_scratchpad;
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        uint8_t *tmp_cr = s->obmc_scratchpad + 8;
        uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
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        int refn0 = h->ref_cache[0][ scan8[n] ];
        int refn1 = h->ref_cache[1][ scan8[n] ];

        mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
                    dest_y, dest_cb, dest_cr,
                    x_offset, y_offset, qpix_put, chroma_put);
        mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
                    tmp_y, tmp_cb, tmp_cr,
                    x_offset, y_offset, qpix_put, chroma_put);

        if(h->use_weight == 2){
            int weight0 = h->implicit_weight[refn0][refn1];
            int weight1 = 64 - weight0;
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            luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
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        }else{
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            luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
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                            h->luma_weight[0][refn0], h->luma_weight[1][refn1],
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                            h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
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            chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
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                            h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
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                            h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
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            chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
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                            h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
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                            h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
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        }
    }else{
        int list = list1 ? 1 : 0;
        int refn = h->ref_cache[list][ scan8[n] ];
        Picture *ref= &h->ref_list[list][refn];
        mc_dir_part(h, ref, n, square, chroma_height, delta, list,
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_put, chroma_put);

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        luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
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                       h->luma_weight[list][refn], h->luma_offset[list][refn]);
        if(h->use_weight_chroma){
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            chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
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                             h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
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            chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
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                             h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
        }
    }
}

static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
                           uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                           int x_offset, int y_offset,
                           qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
                           qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
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                           h264_weight_func *weight_op, h264_biweight_func *weight_avg,
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                           int list0, int list1){
    if((h->use_weight==2 && list0 && list1
        && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
       || h->use_weight==1)
        mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
                         x_offset, y_offset, qpix_put, chroma_put,
                         weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
    else
        mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
                    x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
}

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static inline void prefetch_motion(H264Context *h, int list){
    /* fetch pixels for estimated mv 4 macroblocks ahead
     * optimized for 64byte cache lines */
    MpegEncContext * const s = &h->s;
    const int refn = h->ref_cache[list][scan8[0]];
    if(refn >= 0){
        const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
        const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
        uint8_t **src= h->ref_list[list][refn].data;
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        int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
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        s->dsp.prefetch(src[0]+off, s->linesize, 4);
        off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
        s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
    }
}

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static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
                      qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
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                      qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
                      h264_weight_func *weight_op, h264_biweight_func *weight_avg){
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    MpegEncContext * const s = &h->s;
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    const int mb_xy= h->mb_xy;
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    const int mb_type= s->current_picture.mb_type[mb_xy];
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    assert(IS_INTER(mb_type));
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    prefetch_motion(h, 0);

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    if(IS_16X16(mb_type)){
        mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
                qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
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                &weight_op[0], &weight_avg[0],
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                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
    }else if(IS_16X8(mb_type)){
        mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
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                &weight_op[1], &weight_avg[1],
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                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
        mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
                qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
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                &weight_op[1], &weight_avg[1],
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                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
    }else if(IS_8X16(mb_type)){
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        mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
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                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
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                &weight_op[2], &weight_avg[2],
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                IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
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        mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
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                qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
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                &weight_op[2], &weight_avg[2],
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                IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
    }else{
        int i;
1830

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        assert(IS_8X8(mb_type));

        for(i=0; i<4; i++){
            const int sub_mb_type= h->sub_mb_type[i];
            const int n= 4*i;
            int x_offset= (i&1)<<2;
            int y_offset= (i&2)<<1;

            if(IS_SUB_8X8(sub_mb_type)){
                mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
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                    &weight_op[3], &weight_avg[3],
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                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
            }else if(IS_SUB_8X4(sub_mb_type)){
                mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
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                    &weight_op[4], &weight_avg[4],
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                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
                mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
                    qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
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                    &weight_op[4], &weight_avg[4],
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                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
            }else if(IS_SUB_4X8(sub_mb_type)){
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                mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
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                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
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                    &weight_op[5], &weight_avg[5],
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                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
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                mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
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                    qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
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                    &weight_op[5], &weight_avg[5],
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                    IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
            }else{
                int j;
                assert(IS_SUB_4X4(sub_mb_type));
                for(j=0; j<4; j++){
                    int sub_x_offset= x_offset + 2*(j&1);
                    int sub_y_offset= y_offset +   (j&2);
                    mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
                        qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
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                        &weight_op[6], &weight_avg[6],
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                        IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
                }
            }
        }
    }
1876 1877

    prefetch_motion(h, 1);
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}

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static av_cold void init_cavlc_level_tab(void){
    int suffix_length, mask;
    unsigned int i;

    for(suffix_length=0; suffix_length<7; suffix_length++){
        for(i=0; i<(1<<LEVEL_TAB_BITS); i++){
            int prefix= LEVEL_TAB_BITS - av_log2(2*i);
            int level_code= (prefix<<suffix_length) + (i>>(LEVEL_TAB_BITS-prefix-1-suffix_length)) - (1<<suffix_length);

            mask= -(level_code&1);
            level_code= (((2+level_code)>>1) ^ mask) - mask;
            if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){
                cavlc_level_tab[suffix_length][i][0]= level_code;
                cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length;
            }else if(prefix + 1 <= LEVEL_TAB_BITS){
                cavlc_level_tab[suffix_length][i][0]= prefix+100;
                cavlc_level_tab[suffix_length][i][1]= prefix + 1;
            }else{
                cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100;
                cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS;
            }
        }
    }
}

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static av_cold void decode_init_vlc(void){
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    static int done = 0;

    if (!done) {
        int i;
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        int offset;
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        done = 1;

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        chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
        chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
1915
        init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
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                 &chroma_dc_coeff_token_len [0], 1, 1,
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                 &chroma_dc_coeff_token_bits[0], 1, 1,
                 INIT_VLC_USE_NEW_STATIC);
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        offset = 0;
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        for(i=0; i<4; i++){
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            coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
            coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
1924
            init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
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                     &coeff_token_len [i][0], 1, 1,
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                     &coeff_token_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
            offset += coeff_token_vlc_tables_size[i];
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        }
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        /*
         * This is a one time safety check to make sure that
         * the packed static coeff_token_vlc table sizes
         * were initialized correctly.
         */
1935
        assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
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        for(i=0; i<3; i++){
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            chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
            chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
            init_vlc(&chroma_dc_total_zeros_vlc[i],
                     CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
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                     &chroma_dc_total_zeros_len [i][0], 1, 1,
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                     &chroma_dc_total_zeros_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
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        }
        for(i=0; i<15; i++){
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            total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
            total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
            init_vlc(&total_zeros_vlc[i],
                     TOTAL_ZEROS_VLC_BITS, 16,
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                     &total_zeros_len [i][0], 1, 1,
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                     &total_zeros_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
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        }

        for(i=0; i<6; i++){
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            run_vlc[i].table = run_vlc_tables[i];
            run_vlc[i].table_allocated = run_vlc_tables_size;
            init_vlc(&run_vlc[i],
                     RUN_VLC_BITS, 7,
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                     &run_len [i][0], 1, 1,
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                     &run_bits[i][0], 1, 1,
                     INIT_VLC_USE_NEW_STATIC);
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        }
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        run7_vlc.table = run7_vlc_table,
        run7_vlc.table_allocated = run7_vlc_table_size;
1967
        init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
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                 &run_len [6][0], 1, 1,
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                 &run_bits[6][0], 1, 1,
                 INIT_VLC_USE_NEW_STATIC);
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        init_cavlc_level_tab();
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    }
}

static void free_tables(H264Context *h){
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    int i;
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    H264Context *hx;
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    av_freep(&h->intra4x4_pred_mode);
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    av_freep(&h->chroma_pred_mode_table);
    av_freep(&h->cbp_table);
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    av_freep(&h->mvd_table[0]);
    av_freep(&h->mvd_table[1]);
1984
    av_freep(&h->direct_table);
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    av_freep(&h->non_zero_count);
    av_freep(&h->slice_table_base);
    h->slice_table= NULL;
1988

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    av_freep(&h->mb2b_xy);
    av_freep(&h->mb2b8_xy);
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    for(i = 0; i < h->s.avctx->thread_count; i++) {
        hx = h->thread_context[i];
        if(!hx) continue;
        av_freep(&hx->top_borders[1]);
        av_freep(&hx->top_borders[0]);
        av_freep(&hx->s.obmc_scratchpad);
    }
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}

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static void init_dequant8_coeff_table(H264Context *h){
    int i,q,x;
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2003
    const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
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    h->dequant8_coeff[0] = h->dequant8_buffer[0];
    h->dequant8_coeff[1] = h->dequant8_buffer[1];

    for(i=0; i<2; i++ ){
        if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
            h->dequant8_coeff[1] = h->dequant8_buffer[0];
            break;
        }

        for(q=0; q<52; q++){
2014 2015
            int shift = div6[q];
            int idx = rem6[q];
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            for(x=0; x<64; x++)
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                h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
                    ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
                    h->pps.scaling_matrix8[i][x]) << shift;
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        }
    }
}

static void init_dequant4_coeff_table(H264Context *h){
    int i,j,q,x;
2026
    const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
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    for(i=0; i<6; i++ ){
        h->dequant4_coeff[i] = h->dequant4_buffer[i];
        for(j=0; j<i; j++){
            if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
                h->dequant4_coeff[i] = h->dequant4_buffer[j];
                break;
            }
        }
        if(j<i)
            continue;

        for(q=0; q<52; q++){
2039 2040
            int shift = div6[q] + 2;
            int idx = rem6[q];
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2041
            for(x=0; x<16; x++)
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                h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
                    ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
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                    h->pps.scaling_matrix4[i][x]) << shift;
        }
    }
}

static void init_dequant_tables(H264Context *h){
    int i,x;
    init_dequant4_coeff_table(h);
    if(h->pps.transform_8x8_mode)
        init_dequant8_coeff_table(h);
    if(h->sps.transform_bypass){
        for(i=0; i<6; i++)
            for(x=0; x<16; x++)
                h->dequant4_coeff[i][0][x] = 1<<6;
        if(h->pps.transform_8x8_mode)
            for(i=0; i<2; i++)
                for(x=0; x<64; x++)
                    h->dequant8_coeff[i][0][x] = 1<<6;
    }
}


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/**
 * allocates tables.
2068
 * needs width/height
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 */
static int alloc_tables(H264Context *h){
    MpegEncContext * const s = &h->s;
2072
    const int big_mb_num= s->mb_stride * (s->mb_height+1);
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    int x,y;
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    CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
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    CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2078
    CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base))
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    CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
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    CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
    CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
    CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
    CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
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    memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
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    h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
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2089 2090
    CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
    CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
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    for(y=0; y<s->mb_height; y++){
        for(x=0; x<s->mb_width; x++){
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            const int mb_xy= x + y*s->mb_stride;
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            const int b_xy = 4*x + 4*y*h->b_stride;
            const int b8_xy= 2*x + 2*y*h->b8_stride;
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            h->mb2b_xy [mb_xy]= b_xy;
            h->mb2b8_xy[mb_xy]= b8_xy;
        }
    }
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    s->obmc_scratchpad = NULL;

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    if(!h->dequant4_coeff[0])
        init_dequant_tables(h);

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    return 0;
fail:
    free_tables(h);
    return -1;
}

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/**
 * Mimic alloc_tables(), but for every context thread.
 */
static void clone_tables(H264Context *dst, H264Context *src){
    dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
    dst->non_zero_count           = src->non_zero_count;
    dst->slice_table              = src->slice_table;
    dst->cbp_table                = src->cbp_table;
    dst->mb2b_xy                  = src->mb2b_xy;
    dst->mb2b8_xy                 = src->mb2b8_xy;
    dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
    dst->mvd_table[0]             = src->mvd_table[0];
    dst->mvd_table[1]             = src->mvd_table[1];
    dst->direct_table             = src->direct_table;

    dst->s.obmc_scratchpad = NULL;
    ff_h264_pred_init(&dst->hpc, src->s.codec_id);
}

/**
 * Init context
 * Allocate buffers which are not shared amongst multiple threads.
 */
static int context_init(H264Context *h){
    CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
    CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))

    return 0;
fail:
    return -1; // free_tables will clean up for us
}

2145
static av_cold void common_init(H264Context *h){
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    MpegEncContext * const s = &h->s;

    s->width = s->avctx->width;
    s->height = s->avctx->height;
    s->codec_id= s->avctx->codec->id;
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    ff_h264_pred_init(&h->hpc, s->codec_id);
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    h->dequant_coeff_pps= -1;
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    s->unrestricted_mv=1;
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    s->decode=1; //FIXME
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    dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early

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    memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
    memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
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}

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/**
 * Reset SEI values at the beginning of the frame.
 *
 * @param h H.264 context.
 */
static void reset_sei(H264Context *h) {
    h->sei_recovery_frame_cnt       = -1;
    h->sei_dpb_output_delay         =  0;
    h->sei_cpb_removal_delay        = -1;
    h->sei_buffering_period_present =  0;
}

2176
static av_cold int decode_init(AVCodecContext *avctx){
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    H264Context *h= avctx->priv_data;
    MpegEncContext * const s = &h->s;

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    MPV_decode_defaults(s);
2181

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    s->avctx = avctx;
    common_init(h);

    s->out_format = FMT_H264;
    s->workaround_bugs= avctx->workaround_bugs;

    // set defaults
//    s->decode_mb= ff_h263_decode_mb;
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    s->quarter_sample = 1;
2191
    if(!avctx->has_b_frames)
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    s->low_delay= 1;
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    if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
2195
        avctx->pix_fmt= PIX_FMT_VDPAU_H264;
2196
    else
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        avctx->pix_fmt= avctx->get_format(avctx, avctx->codec->pix_fmts);
2198
    avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
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    decode_init_vlc();
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    if(avctx->extradata_size > 0 && avctx->extradata &&
       *(char *)avctx->extradata == 1){
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        h->is_avc = 1;
        h->got_avcC = 0;
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    } else {
        h->is_avc = 0;
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    }

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    h->thread_context[0] = h;
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    h->outputed_poc = INT_MIN;
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    h->prev_poc_msb= 1<<16;
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    reset_sei(h);
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    if(avctx->codec_id == CODEC_ID_H264){
        if(avctx->ticks_per_frame == 1){
            s->avctx->time_base.den *=2;
        }
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        avctx->ticks_per_frame = 2;
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    }
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    return 0;
}

2223
static int frame_start(H264Context *h){
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    MpegEncContext * const s = &h->s;
    int i;

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    if(MPV_frame_start(s, s->avctx) < 0)
        return -1;
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    ff_er_frame_start(s);
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    /*
     * MPV_frame_start uses pict_type to derive key_frame.
     * This is incorrect for H.264; IDR markings must be used.
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     * Zero here; IDR markings per slice in frame or fields are ORed in later.
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     * See decode_nal_units().
     */
    s->current_picture_ptr->key_frame= 0;
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    assert(s->linesize && s->uvlinesize);

    for(i=0; i<16; i++){
        h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2242
        h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
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    }
    for(i=0; i<4; i++){
        h->block_offset[16+i]=
        h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2247 2248
        h->block_offset[24+16+i]=
        h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
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    }

2251 2252
    /* can't be in alloc_tables because linesize isn't known there.
     * FIXME: redo bipred weight to not require extra buffer? */
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    for(i = 0; i < s->avctx->thread_count; i++)
        if(!h->thread_context[i]->s.obmc_scratchpad)
            h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
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2256 2257

    /* some macroblocks will be accessed before they're available */
2258
    if(FRAME_MBAFF || s->avctx->thread_count > 1)
2259
        memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
2260

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2261
//    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2262

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    // We mark the current picture as non-reference after allocating it, so
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    // that if we break out due to an error it can be released automatically
    // in the next MPV_frame_start().
    // SVQ3 as well as most other codecs have only last/next/current and thus
    // get released even with set reference, besides SVQ3 and others do not
    // mark frames as reference later "naturally".
    if(s->codec_id != CODEC_ID_SVQ3)
        s->current_picture_ptr->reference= 0;
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    s->current_picture_ptr->field_poc[0]=
    s->current_picture_ptr->field_poc[1]= INT_MAX;
2274
    assert(s->current_picture_ptr->long_ref==0);
2275

2276
    return 0;
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}

2279
static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
2280 2281
    MpegEncContext * const s = &h->s;
    int i;
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    int step    = 1;
    int offset  = 1;
    int uvoffset= 1;
    int top_idx = 1;
    int skiplast= 0;
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    src_y  -=   linesize;
    src_cb -= uvlinesize;
    src_cr -= uvlinesize;

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    if(!simple && FRAME_MBAFF){
        if(s->mb_y&1){
            offset  = MB_MBAFF ? 1 : 17;
            uvoffset= MB_MBAFF ? 1 : 9;
            if(!MB_MBAFF){
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 0)= *(uint64_t*)(src_y +  15*linesize);
                *(uint64_t*)(h->top_borders[0][s->mb_x]+ 8)= *(uint64_t*)(src_y +8+15*linesize);
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                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
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                    *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+7*uvlinesize);
                    *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+7*uvlinesize);
                }
            }
        }else{
            if(!MB_MBAFF){
                h->left_border[0]= h->top_borders[0][s->mb_x][15];
2307
                if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
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                    h->left_border[34   ]= h->top_borders[0][s->mb_x][16+7  ];
                    h->left_border[34+18]= h->top_borders[0][s->mb_x][16+8+7];
                }
                skiplast= 1;
            }
            offset  =
            uvoffset=
            top_idx = MB_MBAFF ? 0 : 1;
        }
        step= MB_MBAFF ? 2 : 1;
    }

2320
    // There are two lines saved, the line above the the top macroblock of a pair,
2321
    // and the line above the bottom macroblock
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    h->left_border[offset]= h->top_borders[top_idx][s->mb_x][15];
    for(i=1; i<17 - skiplast; i++){
        h->left_border[offset+i*step]= src_y[15+i*  linesize];
2325
    }
2326

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    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
    *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2329

2330
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2331 2332 2333 2334 2335
        h->left_border[uvoffset+34   ]= h->top_borders[top_idx][s->mb_x][16+7];
        h->left_border[uvoffset+34+18]= h->top_borders[top_idx][s->mb_x][24+7];
        for(i=1; i<9 - skiplast; i++){
            h->left_border[uvoffset+34   +i*step]= src_cb[7+i*uvlinesize];
            h->left_border[uvoffset+34+18+i*step]= src_cr[7+i*uvlinesize];
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        }
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        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
        *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
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    }
}

2342
static inline void xchg_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg, int simple){
2343 2344 2345
    MpegEncContext * const s = &h->s;
    int temp8, i;
    uint64_t temp64;
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    int deblock_left;
    int deblock_top;
    int mb_xy;
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    int step    = 1;
    int offset  = 1;
    int uvoffset= 1;
    int top_idx = 1;

    if(!simple && FRAME_MBAFF){
        if(s->mb_y&1){
            offset  = MB_MBAFF ? 1 : 17;
            uvoffset= MB_MBAFF ? 1 : 9;
        }else{
            offset  =
            uvoffset=
            top_idx = MB_MBAFF ? 0 : 1;
        }
        step= MB_MBAFF ? 2 : 1;
    }
2365 2366

    if(h->deblocking_filter == 2) {
2367
        mb_xy = h->mb_xy;
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        deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
        deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
    } else {
        deblock_left = (s->mb_x > 0);
2372
        deblock_top =  (s->mb_y > !!MB_FIELD);
2373
    }
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    src_y  -=   linesize + 1;
    src_cb -= uvlinesize + 1;
    src_cr -= uvlinesize + 1;

#define XCHG(a,b,t,xchg)\
t= a;\
if(xchg)\
    a= b;\
b= t;
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    if(deblock_left){
2386 2387
        for(i = !deblock_top; i<16; i++){
            XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, xchg);
2388
        }
2389
        XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, 1);
2390 2391 2392
    }

    if(deblock_top){
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        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
        XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
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2395
        if(s->mb_x+1 < s->mb_width){
2396
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
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        }
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    }

2400
    if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2401
        if(deblock_left){
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            for(i = !deblock_top; i<8; i++){
                XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, xchg);
                XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, xchg);
2405
            }
2406 2407
            XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, 1);
            XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, 1);
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        }
        if(deblock_top){
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            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
            XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
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        }
    }
}

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static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
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    MpegEncContext * const s = &h->s;
    const int mb_x= s->mb_x;
    const int mb_y= s->mb_y;
2420
    const int mb_xy= h->mb_xy;
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    const int mb_type= s->current_picture.mb_type[mb_xy];
    uint8_t  *dest_y, *dest_cb, *dest_cr;
    int linesize, uvlinesize /*dct_offset*/;
    int i;
2425
    int *block_offset = &h->block_offset[0];
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2426
    const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2427
    /* is_h264 should always be true if SVQ3 is disabled. */
2428
    const int is_h264 = !CONFIG_SVQ3_DECODER || simple || s->codec_id == CODEC_ID_H264;
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2429
    void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2430
    void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
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2431

2432 2433 2434
    dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
    dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
    dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
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2435

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    s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
    s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);

2439
    if (!simple && MB_FIELD) {
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2440 2441
        linesize   = h->mb_linesize   = s->linesize * 2;
        uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2442
        block_offset = &h->block_offset[24];
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2443
        if(mb_y&1){ //FIXME move out of this function?
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2444
            dest_y -= s->linesize*15;
2445 2446
            dest_cb-= s->uvlinesize*7;
            dest_cr-= s->uvlinesize*7;
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        }
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        if(FRAME_MBAFF) {
            int list;
2450
            for(list=0; list<h->list_count; list++){
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2451 2452 2453 2454
                if(!USES_LIST(mb_type, list))
                    continue;
                if(IS_16X16(mb_type)){
                    int8_t *ref = &h->ref_cache[list][scan8[0]];
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2455
                    fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
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                }else{
                    for(i=0; i<16; i+=4){
                        int ref = h->ref_cache[list][scan8[i]];
                        if(ref >= 0)
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2460
                            fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
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                    }
                }
            }
        }
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    } else {
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        linesize   = h->mb_linesize   = s->linesize;
        uvlinesize = h->mb_uvlinesize = s->uvlinesize;
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//        dct_offset = s->linesize * 16;
    }
2470

2471
    if (!simple && IS_INTRA_PCM(mb_type)) {
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        for (i=0; i<16; i++) {
            memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
2474
        }
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        for (i=0; i<8; i++) {
            memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
            memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
2478
        }
2479 2480
    } else {
        if(IS_INTRA(mb_type)){
2481
            if(h->deblocking_filter)
2482
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2483

2484
            if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2485 2486
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
                h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2487
            }
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2488

2489
            if(IS_INTRA4x4(mb_type)){
2490
                if(simple || !s->encoding){
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2491
                    if(IS_8x8DCT(mb_type)){
2492 2493 2494
                        if(transform_bypass){
                            idct_dc_add =
                            idct_add    = s->dsp.add_pixels8;
2495
                        }else{
2496 2497 2498
                            idct_dc_add = s->dsp.h264_idct8_dc_add;
                            idct_add    = s->dsp.h264_idct8_add;
                        }
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                        for(i=0; i<16; i+=4){
                            uint8_t * const ptr= dest_y + block_offset[i];
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
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                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
                                h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
                            }else{
2505 2506 2507 2508 2509 2510 2511 2512 2513
                                const int nnz = h->non_zero_count_cache[ scan8[i] ];
                                h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
                                                            (h->topright_samples_available<<i)&0x4000, linesize);
                                if(nnz){
                                    if(nnz == 1 && h->mb[i*16])
                                        idct_dc_add(ptr, h->mb + i*16, linesize);
                                    else
                                        idct_add   (ptr, h->mb + i*16, linesize);
                                }
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                            }
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                        }
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                    }else{
                        if(transform_bypass){
                            idct_dc_add =
                            idct_add    = s->dsp.add_pixels4;
                        }else{
                            idct_dc_add = s->dsp.h264_idct_dc_add;
                            idct_add    = s->dsp.h264_idct_add;
                        }
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                        for(i=0; i<16; i++){
                            uint8_t * const ptr= dest_y + block_offset[i];
                            const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2527

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                            if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
                                h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
                            }else{
                                uint8_t *topright;
                                int nnz, tr;
                                if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
                                    const int topright_avail= (h->topright_samples_available<<i)&0x8000;
                                    assert(mb_y || linesize <= block_offset[i]);
                                    if(!topright_avail){
                                        tr= ptr[3 - linesize]*0x01010101;
                                        topright= (uint8_t*) &tr;
                                    }else
                                        topright= ptr + 4 - linesize;
2541
                                }else
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                                    topright= NULL;

                                h->hpc.pred4x4[ dir ](ptr, topright, linesize);
                                nnz = h->non_zero_count_cache[ scan8[i] ];
                                if(nnz){
                                    if(is_h264){
                                        if(nnz == 1 && h->mb[i*16])
                                            idct_dc_add(ptr, h->mb + i*16, linesize);
                                        else
                                            idct_add   (ptr, h->mb + i*16, linesize);
                                    }else
                                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
                                }
2555
                            }
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                        }
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                    }
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                }
2559
            }else{
2560
                h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2561
                if(is_h264){
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2562
                    if(!transform_bypass)
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2563
                        h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
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2564
                }else
2565
                    svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
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            }
2567
            if(h->deblocking_filter)
2568
                xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2569
        }else if(is_h264){
2570
            hl_motion(h, dest_y, dest_cb, dest_cr,
2571 2572
                      s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
                      s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2573
                      s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
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        }
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        if(!IS_INTRA4x4(mb_type)){
2578
            if(is_h264){
2579
                if(IS_INTRA16x16(mb_type)){
2580 2581
                    if(transform_bypass){
                        if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
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                            h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
                        }else{
                            for(i=0; i<16; i++){
                                if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2586
                                    s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
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                            }
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                        }
                    }else{
                         s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
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                    }
2592
                }else if(h->cbp&15){
2593
                    if(transform_bypass){
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2594
                        const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2595
                        idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
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                        for(i=0; i<16; i+=di){
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                            if(h->non_zero_count_cache[ scan8[i] ]){
2598
                                idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
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                            }
2600
                        }
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                    }else{
                        if(IS_8x8DCT(mb_type)){
                            s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
                        }else{
                            s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
                        }
                    }
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                }
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            }else{
                for(i=0; i<16; i++){
                    if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
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                        uint8_t * const ptr= dest_y + block_offset[i];
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                        svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
                    }
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                }
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            }
        }

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        if((simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
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            uint8_t *dest[2] = {dest_cb, dest_cr};
            if(transform_bypass){
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                if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
                    h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
                }else{
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                    idct_add = s->dsp.add_pixels4;
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                    for(i=16; i<16+8; i++){
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
                    }
                }
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            }else{
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                chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
                chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
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                if(is_h264){
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                    idct_add = s->dsp.h264_idct_add;
                    idct_dc_add = s->dsp.h264_idct_dc_add;
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                    for(i=16; i<16+8; i++){
                        if(h->non_zero_count_cache[ scan8[i] ])
                            idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
                        else if(h->mb[i*16])
                            idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
                    }
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                }else{
                    for(i=16; i<16+8; i++){
                        if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
                            uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
                            svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
                        }
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                    }
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                }
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            }
        }
    }
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    if(h->cbp || IS_INTRA(mb_type))
        s->dsp.clear_blocks(h->mb);

2658
    if(h->deblocking_filter) {
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        backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
        fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2663
        if (!simple && FRAME_MBAFF) {
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            filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
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        } else {
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            filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
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        }
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    }
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}

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/**
 * Process a macroblock; this case avoids checks for expensive uncommon cases.
 */
static void hl_decode_mb_simple(H264Context *h){
    hl_decode_mb_internal(h, 1);
}

/**
 * Process a macroblock; this handles edge cases, such as interlacing.
 */
static void av_noinline hl_decode_mb_complex(H264Context *h){
    hl_decode_mb_internal(h, 0);
}

static void hl_decode_mb(H264Context *h){
    MpegEncContext * const s = &h->s;
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    const int mb_xy= h->mb_xy;
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    const int mb_type= s->current_picture.mb_type[mb_xy];
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    int is_complex = CONFIG_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
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    if (is_complex)
        hl_decode_mb_complex(h);
    else hl_decode_mb_simple(h);
}

2696
static void pic_as_field(Picture *pic, const int parity){
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    int i;
    for (i = 0; i < 4; ++i) {
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        if (parity == PICT_BOTTOM_FIELD)
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            pic->data[i] += pic->linesize[i];
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        pic->reference = parity;
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        pic->linesize[i] *= 2;
    }
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    pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
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}

static int split_field_copy(Picture *dest, Picture *src,
                            int parity, int id_add){
    int match = !!(src->reference & parity);

    if (match) {
        *dest = *src;
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        if(parity != PICT_FRAME){
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            pic_as_field(dest, parity);
            dest->pic_id *= 2;
            dest->pic_id += id_add;
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        }
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    }

    return match;
}

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static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
    int i[2]={0};
    int index=0;
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    while(i[0]<len || i[1]<len){
        while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
            i[0]++;
        while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
            i[1]++;
        if(i[0] < len){
            in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
            split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
        }
        if(i[1] < len){
            in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
            split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
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        }
    }

2742
    return index;
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}

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static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
    int i, best_poc;
    int out_i= 0;
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    for(;;){
        best_poc= dir ? INT_MIN : INT_MAX;
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        for(i=0; i<len; i++){
            const int poc= src[i]->poc;
            if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
                best_poc= poc;
                sorted[out_i]= src[i];
            }
        }
        if(best_poc == (dir ? INT_MIN : INT_MAX))
            break;
        limit= sorted[out_i++]->poc - dir;
    }
    return out_i;
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}

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/**
 * fills the default_ref_list.
 */
static int fill_default_ref_list(H264Context *h){
    MpegEncContext * const s = &h->s;
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    int i, len;
2772

2773
    if(h->slice_type_nos==FF_B_TYPE){
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        Picture *sorted[32];
        int cur_poc, list;
        int lens[2];
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        if(FIELD_PICTURE)
            cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
        else
            cur_poc= s->current_picture_ptr->poc;
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        for(list= 0; list<2; list++){
            len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
            len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
            assert(len<=32);
            len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
            len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
            assert(len<=32);
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            if(len < h->ref_count[list])
                memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
            lens[list]= len;
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        }

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        if(lens[0] == lens[1] && lens[1] > 1){
            for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
            if(i == lens[0])
                FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
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        }
    }else{
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        len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
        len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
        assert(len <= 32);
        if(len < h->ref_count[0])
            memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
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    }
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#ifdef TRACE
    for (i=0; i<h->ref_count[0]; i++) {
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        tprintf(h->s.avctx, "List0: %s fn:%d 0x%p\n", (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), h->default_ref_list[0][i].pic_id, h->default_ref_list[0][i].data[0]);
2811
    }
2812
    if(h->slice_type_nos==FF_B_TYPE){
2813
        for (i=0; i<h->ref_count[1]; i++) {
2814
            tprintf(h->s.avctx, "List1: %s fn:%d 0x%p\n", (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), h->default_ref_list[1][i].pic_id, h->default_ref_list[1][i].data[0]);
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        }
    }
#endif
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    return 0;
}

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static void print_short_term(H264Context *h);
static void print_long_term(H264Context *h);

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/**
 * Extract structure information about the picture described by pic_num in
 * the current decoding context (frame or field). Note that pic_num is
 * picture number without wrapping (so, 0<=pic_num<max_pic_num).
 * @param pic_num picture number for which to extract structure information
 * @param structure one of PICT_XXX describing structure of picture
 *                      with pic_num
 * @return frame number (short term) or long term index of picture
 *         described by pic_num
 */
static int pic_num_extract(H264Context *h, int pic_num, int *structure){
    MpegEncContext * const s = &h->s;

    *structure = s->picture_structure;
    if(FIELD_PICTURE){
        if (!(pic_num & 1))
            /* opposite field */
            *structure ^= PICT_FRAME;
        pic_num >>= 1;
    }

    return pic_num;
}

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static int decode_ref_pic_list_reordering(H264Context *h){
    MpegEncContext * const s = &h->s;
2850
    int list, index, pic_structure;
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    print_short_term(h);
    print_long_term(h);
2854

2855
    for(list=0; list<h->list_count; list++){
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        memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);

        if(get_bits1(&s->gb)){
            int pred= h->curr_pic_num;

            for(index=0; ; index++){
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                unsigned int reordering_of_pic_nums_idc= get_ue_golomb_31(&s->gb);
2863
                unsigned int pic_id;
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                int i;
2865
                Picture *ref = NULL;
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                if(reordering_of_pic_nums_idc==3)
2868
                    break;
2869

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2870
                if(index >= h->ref_count[list]){
2871
                    av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
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                    return -1;
                }
2874

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                if(reordering_of_pic_nums_idc<3){
                    if(reordering_of_pic_nums_idc<2){
2877
                        const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2878
                        int frame_num;
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2879

2880
                        if(abs_diff_pic_num > h->max_pic_num){
2881
                            av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
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                            return -1;
                        }

                        if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
                        else                                pred+= abs_diff_pic_num;
                        pred &= h->max_pic_num - 1;
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                        frame_num = pic_num_extract(h, pred, &pic_structure);

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                        for(i= h->short_ref_count-1; i>=0; i--){
                            ref = h->short_ref[i];
2893
                            assert(ref->reference);
2894
                            assert(!ref->long_ref);
2895
                            if(
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                                   ref->frame_num == frame_num &&
                                   (ref->reference & pic_structure)
2898
                              )
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                                break;
                        }
2901
                        if(i>=0)
2902
                            ref->pic_id= pred;
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2903
                    }else{
2904
                        int long_idx;
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2905
                        pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
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                        long_idx= pic_num_extract(h, pic_id, &pic_structure);

                        if(long_idx>31){
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                            av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
                            return -1;
                        }
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                        ref = h->long_ref[long_idx];
                        assert(!(ref && !ref->reference));
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                        if(ref && (ref->reference & pic_structure)){
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                            ref->pic_id= pic_id;
                            assert(ref->long_ref);
                            i=0;
                        }else{
                            i=-1;
                        }
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                    }

2924
                    if (i < 0) {
2925
                        av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
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                        memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
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                    } else {
                        for(i=index; i+1<h->ref_count[list]; i++){
                            if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
                                break;
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                        }
                        for(; i > index; i--){
                            h->ref_list[list][i]= h->ref_list[list][i-1];
                        }
2935
                        h->ref_list[list][index]= *ref;
2936
                        if (FIELD_PICTURE){
2937
                            pic_as_field(&h->ref_list[list][index], pic_structure);
2938
                        }
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2939
                    }
2940
                }else{
2941
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
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                    return -1;
                }
            }
        }
    }
2947
    for(list=0; list<h->list_count; list++){
2948
        for(index= 0; index < h->ref_count[list]; index++){
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            if(!h->ref_list[list][index].data[0]){
                av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
                h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
            }
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        }
    }
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    return 0;
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}

2959
static void fill_mbaff_ref_list(H264Context *h){
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    int list, i, j;
2961
    for(list=0; list<2; list++){ //FIXME try list_count
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        for(i=0; i<h->ref_count[list]; i++){
            Picture *frame = &h->ref_list[list][i];
            Picture *field = &h->ref_list[list][16+2*i];
            field[0] = *frame;
            for(j=0; j<3; j++)
                field[0].linesize[j] <<= 1;
2968
            field[0].reference = PICT_TOP_FIELD;
2969
            field[0].poc= field[0].field_poc[0];
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            field[1] = field[0];
            for(j=0; j<3; j++)
                field[1].data[j] += frame->linesize[j];
2973
            field[1].reference = PICT_BOTTOM_FIELD;
2974
            field[1].poc= field[1].field_poc[1];
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            h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
            h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
            for(j=0; j<2; j++){
                h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
                h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
            }
        }
    }
    for(j=0; j<h->ref_count[1]; j++){
        for(i=0; i<h->ref_count[0]; i++)
            h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
        memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
        memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
    }
}

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static int pred_weight_table(H264Context *h){
    MpegEncContext * const s = &h->s;
    int list, i;
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    int luma_def, chroma_def;
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    h->use_weight= 0;
    h->use_weight_chroma= 0;
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    h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
    h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
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    luma_def = 1<<h->luma_log2_weight_denom;
    chroma_def = 1<<h->chroma_log2_weight_denom;
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    for(list=0; list<2; list++){
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        h->luma_weight_flag[list]   = 0;
        h->chroma_weight_flag[list] = 0;
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        for(i=0; i<h->ref_count[list]; i++){
            int luma_weight_flag, chroma_weight_flag;
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            luma_weight_flag= get_bits1(&s->gb);
            if(luma_weight_flag){
                h->luma_weight[list][i]= get_se_golomb(&s->gb);
                h->luma_offset[list][i]= get_se_golomb(&s->gb);
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                if(   h->luma_weight[list][i] != luma_def
3015
                   || h->luma_offset[list][i] != 0) {
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                    h->use_weight= 1;
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                    h->luma_weight_flag[list]= 1;
                }
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            }else{
                h->luma_weight[list][i]= luma_def;
                h->luma_offset[list][i]= 0;
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            }

3024
            if(CHROMA){
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                chroma_weight_flag= get_bits1(&s->gb);
                if(chroma_weight_flag){
                    int j;
                    for(j=0; j<2; j++){
                        h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
                        h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
                        if(   h->chroma_weight[list][i][j] != chroma_def
3032
                           || h->chroma_offset[list][i][j] != 0) {
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3033
                            h->use_weight_chroma= 1;
3034 3035
                            h->chroma_weight_flag[list]= 1;
                        }
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3036 3037 3038 3039 3040 3041 3042
                    }
                }else{
                    int j;
                    for(j=0; j<2; j++){
                        h->chroma_weight[list][i][j]= chroma_def;
                        h->chroma_offset[list][i][j]= 0;
                    }
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3043 3044 3045
                }
            }
        }
3046
        if(h->slice_type_nos != FF_B_TYPE) break;
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3047
    }
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3048
    h->use_weight= h->use_weight || h->use_weight_chroma;
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3049 3050 3051
    return 0;
}

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3052 3053
static void implicit_weight_table(H264Context *h){
    MpegEncContext * const s = &h->s;
3054
    int ref0, ref1, i;
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3055 3056
    int cur_poc = s->current_picture_ptr->poc;

3057 3058 3059 3060 3061
    for (i = 0; i < 2; i++) {
        h->luma_weight_flag[i]   = 0;
        h->chroma_weight_flag[i] = 0;
    }

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3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076
    if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
       && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
        h->use_weight= 0;
        h->use_weight_chroma= 0;
        return;
    }

    h->use_weight= 2;
    h->use_weight_chroma= 2;
    h->luma_log2_weight_denom= 5;
    h->chroma_log2_weight_denom= 5;

    for(ref0=0; ref0 < h->ref_count[0]; ref0++){
        int poc0 = h->ref_list[0][ref0].poc;
        for(ref1=0; ref1 < h->ref_count[1]; ref1++){
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3077
            int poc1 = h->ref_list[1][ref1].poc;
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3078
            int td = av_clip(poc1 - poc0, -128, 127);
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3079
            if(td){
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3080
                int tb = av_clip(cur_poc - poc0, -128, 127);
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3081
                int tx = (16384 + (FFABS(td) >> 1)) / td;
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3082
                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
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3083 3084 3085 3086 3087 3088 3089 3090 3091 3092
                if(dist_scale_factor < -64 || dist_scale_factor > 128)
                    h->implicit_weight[ref0][ref1] = 32;
                else
                    h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
            }else
                h->implicit_weight[ref0][ref1] = 32;
        }
    }
}

3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104
/**
 * Mark a picture as no longer needed for reference. The refmask
 * argument allows unreferencing of individual fields or the whole frame.
 * If the picture becomes entirely unreferenced, but is being held for
 * display purposes, it is marked as such.
 * @param refmask mask of fields to unreference; the mask is bitwise
 *                anded with the reference marking of pic
 * @return non-zero if pic becomes entirely unreferenced (except possibly
 *         for display purposes) zero if one of the fields remains in
 *         reference
 */
static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3105
    int i;
3106 3107 3108
    if (pic->reference &= refmask) {
        return 0;
    } else {
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3109 3110 3111 3112 3113
        for(i = 0; h->delayed_pic[i]; i++)
            if(pic == h->delayed_pic[i]){
                pic->reference=DELAYED_PIC_REF;
                break;
            }
3114 3115
        return 1;
    }
3116 3117
}

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3118
/**
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3119
 * instantaneous decoder refresh.
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3120 3121
 */
static void idr(H264Context *h){
3122
    int i;
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3123

3124
    for(i=0; i<16; i++){
3125
        remove_long(h, i, 0);
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3126
    }
3127
    assert(h->long_ref_count==0);
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3128 3129

    for(i=0; i<h->short_ref_count; i++){
3130
        unreference_pic(h, h->short_ref[i], 0);
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3131 3132 3133
        h->short_ref[i]= NULL;
    }
    h->short_ref_count=0;
3134
    h->prev_frame_num= 0;
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3135 3136 3137
    h->prev_frame_num_offset= 0;
    h->prev_poc_msb=
    h->prev_poc_lsb= 0;
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3138 3139
}

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3140 3141 3142 3143
/* forget old pics after a seek */
static void flush_dpb(AVCodecContext *avctx){
    H264Context *h= avctx->priv_data;
    int i;
3144
    for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
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3145 3146
        if(h->delayed_pic[i])
            h->delayed_pic[i]->reference= 0;
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lorenm committed
3147
        h->delayed_pic[i]= NULL;
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3148
    }
3149
    h->outputed_poc= INT_MIN;
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3150
    idr(h);
3151 3152
    if(h->s.current_picture_ptr)
        h->s.current_picture_ptr->reference= 0;
3153
    h->s.first_field= 0;
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cehoyos committed
3154
    reset_sei(h);
3155
    ff_mpeg_flush(avctx);
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3156 3157
}

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3158
/**
3159 3160 3161 3162 3163 3164
 * Find a Picture in the short term reference list by frame number.
 * @param frame_num frame number to search for
 * @param idx the index into h->short_ref where returned picture is found
 *            undefined if no picture found.
 * @return pointer to the found picture, or NULL if no pic with the provided
 *                 frame number is found
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3165
 */
3166
static Picture * find_short(H264Context *h, int frame_num, int *idx){
3167
    MpegEncContext * const s = &h->s;
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3168
    int i;
3169

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3170 3171
    for(i=0; i<h->short_ref_count; i++){
        Picture *pic= h->short_ref[i];
3172
        if(s->avctx->debug&FF_DEBUG_MMCO)
3173
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3174 3175
        if(pic->frame_num == frame_num) {
            *idx = i;
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3176 3177 3178 3179 3180 3181
            return pic;
        }
    }
    return NULL;
}

3182 3183 3184 3185 3186 3187 3188
/**
 * Remove a picture from the short term reference list by its index in
 * that list.  This does no checking on the provided index; it is assumed
 * to be valid. Other list entries are shifted down.
 * @param i index into h->short_ref of picture to remove.
 */
static void remove_short_at_index(H264Context *h, int i){
3189
    assert(i >= 0 && i < h->short_ref_count);
3190 3191 3192 3193 3194 3195 3196 3197 3198
    h->short_ref[i]= NULL;
    if (--h->short_ref_count)
        memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
}

/**
 *
 * @return the removed picture or NULL if an error occurs
 */
3199
static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3200 3201 3202 3203 3204 3205 3206 3207
    MpegEncContext * const s = &h->s;
    Picture *pic;
    int i;

    if(s->avctx->debug&FF_DEBUG_MMCO)
        av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);

    pic = find_short(h, frame_num, &i);
3208 3209
    if (pic){
        if(unreference_pic(h, pic, ref_mask))
3210
        remove_short_at_index(h, i);
3211
    }
3212 3213 3214 3215

    return pic;
}

3216 3217
/**
 * Remove a picture from the long term reference list by its index in
3218
 * that list.
3219
 * @return the removed picture or NULL if an error occurs
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3220
 */
3221
static Picture * remove_long(H264Context *h, int i, int ref_mask){
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3222 3223 3224
    Picture *pic;

    pic= h->long_ref[i];
3225
    if (pic){
3226 3227 3228 3229 3230 3231
        if(unreference_pic(h, pic, ref_mask)){
            assert(h->long_ref[i]->long_ref == 1);
            h->long_ref[i]->long_ref= 0;
            h->long_ref[i]= NULL;
            h->long_ref_count--;
        }
3232
    }
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3233 3234 3235 3236

    return pic;
}

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/**
 * print short term list
 */
static void print_short_term(H264Context *h) {
    uint32_t i;
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
        av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
        for(i=0; i<h->short_ref_count; i++){
            Picture *pic= h->short_ref[i];
            av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
        }
    }
}

/**
 * print long term list
 */
static void print_long_term(H264Context *h) {
    uint32_t i;
    if(h->s.avctx->debug&FF_DEBUG_MMCO) {
        av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
        for(i = 0; i < 16; i++){
            Picture *pic= h->long_ref[i];
            if (pic) {
                av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
            }
        }
    }
}

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3267 3268 3269 3270 3271
/**
 * Executes the reference picture marking (memory management control operations).
 */
static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
    MpegEncContext * const s = &h->s;
3272
    int i, j;
3273
    int current_ref_assigned=0;
3274
    Picture *av_uninit(pic);
3275

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3276
    if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3277
        av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3278

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3279
    for(i=0; i<mmco_count; i++){
3280
        int structure, av_uninit(frame_num);
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3281
        if(s->avctx->debug&FF_DEBUG_MMCO)
3282
            av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_pic_num, h->mmco[i].long_arg);
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3283

3284 3285 3286 3287 3288
        if(   mmco[i].opcode == MMCO_SHORT2UNUSED
           || mmco[i].opcode == MMCO_SHORT2LONG){
            frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
            pic = find_short(h, frame_num, &j);
            if(!pic){
3289 3290
                if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
                   || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3291 3292 3293 3294 3295
                av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
                continue;
            }
        }

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3296 3297
        switch(mmco[i].opcode){
        case MMCO_SHORT2UNUSED:
3298 3299
            if(s->avctx->debug&FF_DEBUG_MMCO)
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", h->mmco[i].short_pic_num, h->short_ref_count);
3300
            remove_short(h, frame_num, structure ^ PICT_FRAME);
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3301 3302
            break;
        case MMCO_SHORT2LONG:
3303 3304
                if (h->long_ref[mmco[i].long_arg] != pic)
                    remove_long(h, mmco[i].long_arg, 0);
3305

3306 3307
                remove_short_at_index(h, j);
                h->long_ref[ mmco[i].long_arg ]= pic;
3308 3309 3310 3311
                if (h->long_ref[ mmco[i].long_arg ]){
                    h->long_ref[ mmco[i].long_arg ]->long_ref=1;
                    h->long_ref_count++;
                }
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3312 3313
            break;
        case MMCO_LONG2UNUSED:
3314 3315 3316
            j = pic_num_extract(h, mmco[i].long_arg, &structure);
            pic = h->long_ref[j];
            if (pic) {
3317
                remove_long(h, j, structure ^ PICT_FRAME);
3318 3319
            } else if(s->avctx->debug&FF_DEBUG_MMCO)
                av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
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3320 3321
            break;
        case MMCO_LONG:
3322
                    // Comment below left from previous code as it is an interresting note.
3323 3324
                    /* First field in pair is in short term list or
                     * at a different long term index.
3325
                     * This is not allowed; see 7.4.3.3, notes 2 and 3.
3326 3327 3328 3329
                     * Report the problem and keep the pair where it is,
                     * and mark this field valid.
                     */

3330
            if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3331
                remove_long(h, mmco[i].long_arg, 0);
3332

3333 3334 3335
                h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
                h->long_ref[ mmco[i].long_arg ]->long_ref=1;
                h->long_ref_count++;
3336
            }
3337

3338
            s->current_picture_ptr->reference |= s->picture_structure;
3339
            current_ref_assigned=1;
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3340 3341
            break;
        case MMCO_SET_MAX_LONG:
3342
            assert(mmco[i].long_arg <= 16);
3343
            // just remove the long term which index is greater than new max
3344
            for(j = mmco[i].long_arg; j<16; j++){
3345
                remove_long(h, j, 0);
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3346 3347 3348 3349
            }
            break;
        case MMCO_RESET:
            while(h->short_ref_count){
3350
                remove_short(h, h->short_ref[0]->frame_num, 0);
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3351
            }
3352
            for(j = 0; j < 16; j++) {
3353
                remove_long(h, j, 0);
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3354
            }
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3355 3356 3357 3358 3359 3360
            s->current_picture_ptr->poc=
            s->current_picture_ptr->field_poc[0]=
            s->current_picture_ptr->field_poc[1]=
            h->poc_lsb=
            h->poc_msb=
            h->frame_num=
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michael committed
3361
            s->current_picture_ptr->frame_num= 0;
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michaelni committed
3362 3363 3364 3365
            break;
        default: assert(0);
        }
    }
3366

3367
    if (!current_ref_assigned) {
3368 3369 3370 3371
        /* Second field of complementary field pair; the first field of
         * which is already referenced. If short referenced, it
         * should be first entry in short_ref. If not, it must exist
         * in long_ref; trying to put it on the short list here is an
3372
         * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
3373 3374 3375 3376 3377 3378 3379 3380 3381 3382
         */
        if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
            /* Just mark the second field valid */
            s->current_picture_ptr->reference = PICT_FRAME;
        } else if (s->current_picture_ptr->long_ref) {
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
                                             "assignment for second field "
                                             "in complementary field pair "
                                             "(first field is long term)\n");
        } else {
3383
            pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
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3384 3385 3386
            if(pic){
                av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
            }
3387

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3388 3389
            if(h->short_ref_count)
                memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3390

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3391 3392 3393 3394
            h->short_ref[0]= s->current_picture_ptr;
            h->short_ref_count++;
            s->current_picture_ptr->reference |= s->picture_structure;
        }
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3395
    }
3396

3397
    if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3398 3399 3400 3401 3402 3403 3404 3405 3406

        /* We have too many reference frames, probably due to corrupted
         * stream. Need to discard one frame. Prevents overrun of the
         * short_ref and long_ref buffers.
         */
        av_log(h->s.avctx, AV_LOG_ERROR,
               "number of reference frames exceeds max (probably "
               "corrupt input), discarding one\n");

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3407
        if (h->long_ref_count && !h->short_ref_count) {
3408 3409 3410 3411 3412
            for (i = 0; i < 16; ++i)
                if (h->long_ref[i])
                    break;

            assert(i < 16);
3413
            remove_long(h, i, 0);
3414
        } else {
3415
            pic = h->short_ref[h->short_ref_count - 1];
3416
            remove_short(h, pic->frame_num, 0);
3417 3418 3419
        }
    }

3420 3421
    print_short_term(h);
    print_long_term(h);
3422
    return 0;
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3423 3424
}

3425
static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
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3426 3427
    MpegEncContext * const s = &h->s;
    int i;
3428

3429
    h->mmco_index= 0;
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michaelni committed
3430
    if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3431
        s->broken_link= get_bits1(gb) -1;
3432
        if(get_bits1(gb)){
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3433
            h->mmco[0].opcode= MMCO_LONG;
3434
            h->mmco[0].long_arg= 0;
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michaelni committed
3435
            h->mmco_index= 1;
3436
        }
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michaelni committed
3437
    }else{
3438
        if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3439
            for(i= 0; i<MAX_MMCO_COUNT; i++) {
3440
                MMCOOpcode opcode= get_ue_golomb_31(gb);
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3441 3442 3443

                h->mmco[i].opcode= opcode;
                if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3444
                    h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3445
/*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3446
                        av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
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3447 3448 3449 3450
                        return -1;
                    }*/
                }
                if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3451
                    unsigned int long_arg= get_ue_golomb_31(gb);
3452
                    if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3453
                        av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
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3454 3455
                        return -1;
                    }
3456
                    h->mmco[i].long_arg= long_arg;
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3457
                }
3458

3459
                if(opcode > (unsigned)MMCO_LONG){
3460
                    av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
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3461 3462
                    return -1;
                }
3463 3464
                if(opcode == MMCO_END)
                    break;
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3465 3466 3467 3468 3469
            }
            h->mmco_index= i;
        }else{
            assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);

3470
            if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3471
                    !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
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michaelni committed
3472
                h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3473
                h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
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michaelni committed
3474
                h->mmco_index= 1;
3475 3476 3477 3478 3479 3480
                if (FIELD_PICTURE) {
                    h->mmco[0].short_pic_num *= 2;
                    h->mmco[1].opcode= MMCO_SHORT2UNUSED;
                    h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
                    h->mmco_index= 2;
                }
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3481
            }
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3482 3483
        }
    }
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    return 0;
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}

static int init_poc(H264Context *h){
    MpegEncContext * const s = &h->s;
    const int max_frame_num= 1<<h->sps.log2_max_frame_num;
    int field_poc[2];
3492
    Picture *cur = s->current_picture_ptr;
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3493

3494
    h->frame_num_offset= h->prev_frame_num_offset;
3495
    if(h->frame_num < h->prev_frame_num)
3496
        h->frame_num_offset += max_frame_num;
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    if(h->sps.poc_type==0){
        const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;

        if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
            h->poc_msb = h->prev_poc_msb + max_poc_lsb;
        else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
            h->poc_msb = h->prev_poc_msb - max_poc_lsb;
        else
            h->poc_msb = h->prev_poc_msb;
//printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3508
        field_poc[0] =
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3509
        field_poc[1] = h->poc_msb + h->poc_lsb;
3510
        if(s->picture_structure == PICT_FRAME)
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            field_poc[1] += h->delta_poc_bottom;
    }else if(h->sps.poc_type==1){
        int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
        int i;

        if(h->sps.poc_cycle_length != 0)
            abs_frame_num = h->frame_num_offset + h->frame_num;
        else
            abs_frame_num = 0;

        if(h->nal_ref_idc==0 && abs_frame_num > 0)
            abs_frame_num--;
3523

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        expected_delta_per_poc_cycle = 0;
        for(i=0; i < h->sps.poc_cycle_length; i++)
            expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse

        if(abs_frame_num > 0){
            int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
            int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;

            expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
            for(i = 0; i <= frame_num_in_poc_cycle; i++)
                expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
        } else
            expectedpoc = 0;

3538
        if(h->nal_ref_idc == 0)
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3539
            expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3540

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        field_poc[0] = expectedpoc + h->delta_poc[0];
        field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;

        if(s->picture_structure == PICT_FRAME)
            field_poc[1] += h->delta_poc[1];
    }else{
3547
        int poc= 2*(h->frame_num_offset + h->frame_num);
3548

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        if(!h->nal_ref_idc)
            poc--;
3551

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        field_poc[0]= poc;
        field_poc[1]= poc;
    }
3555

3556
    if(s->picture_structure != PICT_BOTTOM_FIELD)
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3557
        s->current_picture_ptr->field_poc[0]= field_poc[0];
3558
    if(s->picture_structure != PICT_TOP_FIELD)
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3559
        s->current_picture_ptr->field_poc[1]= field_poc[1];
3560
    cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
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    return 0;
}

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/**
 * initialize scan tables
 */
static void init_scan_tables(H264Context *h){
    MpegEncContext * const s = &h->s;
    int i;
    if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
        memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
        memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
    }else{
        for(i=0; i<16; i++){
#define T(x) (x>>2) | ((x<<2) & 0xF)
            h->zigzag_scan[i] = T(zigzag_scan[i]);
            h-> field_scan[i] = T( field_scan[i]);
#undef T
        }
    }
    if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3584
        memcpy(h->zigzag_scan8x8,       ff_zigzag_direct,     64*sizeof(uint8_t));
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        memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
        memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
        memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
    }else{
        for(i=0; i<64; i++){
#define T(x) (x>>3) | ((x&7)<<3)
3591
            h->zigzag_scan8x8[i]       = T(ff_zigzag_direct[i]);
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            h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
            h->field_scan8x8[i]        = T(field_scan8x8[i]);
            h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
#undef T
        }
    }
    if(h->sps.transform_bypass){ //FIXME same ugly
        h->zigzag_scan_q0          = zigzag_scan;
3600
        h->zigzag_scan8x8_q0       = ff_zigzag_direct;
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        h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
        h->field_scan_q0           = field_scan;
        h->field_scan8x8_q0        = field_scan8x8;
        h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
    }else{
        h->zigzag_scan_q0          = h->zigzag_scan;
        h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
        h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
        h->field_scan_q0           = h->field_scan;
        h->field_scan8x8_q0        = h->field_scan8x8;
        h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
    }
}
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/**
 * Replicates H264 "master" context to thread contexts.
 */
static void clone_slice(H264Context *dst, H264Context *src)
{
    memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
    dst->s.current_picture_ptr  = src->s.current_picture_ptr;
    dst->s.current_picture      = src->s.current_picture;
    dst->s.linesize             = src->s.linesize;
    dst->s.uvlinesize           = src->s.uvlinesize;
3625
    dst->s.first_field          = src->s.first_field;
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    dst->prev_poc_msb           = src->prev_poc_msb;
    dst->prev_poc_lsb           = src->prev_poc_lsb;
    dst->prev_frame_num_offset  = src->prev_frame_num_offset;
    dst->prev_frame_num         = src->prev_frame_num;
    dst->short_ref_count        = src->short_ref_count;

    memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
    memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
    memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
    memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3637 3638 3639

    memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
    memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3640 3641
}

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3642 3643
/**
 * decodes a slice header.
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3644
 * This will also call MPV_common_init() and frame_start() as needed.
3645 3646 3647 3648
 *
 * @param h h264context
 * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
 *
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3649
 * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
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3650
 */
3651
static int decode_slice_header(H264Context *h, H264Context *h0){
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3652
    MpegEncContext * const s = &h->s;
3653
    MpegEncContext * const s0 = &h0->s;
3654
    unsigned int first_mb_in_slice;
3655
    unsigned int pps_id;
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3656
    int num_ref_idx_active_override_flag;
3657
    unsigned int slice_type, tmp, i, j;
3658
    int default_ref_list_done = 0;
3659
    int last_pic_structure;
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3660

3661
    s->dropable= h->nal_ref_idc == 0;
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    if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
        s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
        s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
    }else{
        s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
        s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
    }

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    first_mb_in_slice= get_ue_golomb(&s->gb);

3673
    if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3674
        h0->current_slice = 0;
3675
        if (!s0->first_field)
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3676
            s->current_picture_ptr= NULL;
3677 3678
    }

3679
    slice_type= get_ue_golomb_31(&s->gb);
3680
    if(slice_type > 9){
3681
        av_log(h->s.avctx, AV_LOG_ERROR, "slice type too large (%d) at %d %d\n", h->slice_type, s->mb_x, s->mb_y);
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3682
        return -1;
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3683
    }
3684 3685
    if(slice_type > 4){
        slice_type -= 5;
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        h->slice_type_fixed=1;
    }else
        h->slice_type_fixed=0;
3689

3690
    slice_type= golomb_to_pict_type[ slice_type ];
3691
    if (slice_type == FF_I_TYPE
3692
        || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3693 3694 3695
        default_ref_list_done = 1;
    }
    h->slice_type= slice_type;
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3696
    h->slice_type_nos= slice_type & 3;
3697

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3698
    s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3699
    if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3700 3701 3702 3703
        av_log(h->s.avctx, AV_LOG_ERROR,
               "B picture before any references, skipping\n");
        return -1;
    }
3704

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3705
    pps_id= get_ue_golomb(&s->gb);
3706
    if(pps_id>=MAX_PPS_COUNT){
3707
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
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3708 3709
        return -1;
    }
3710
    if(!h0->pps_buffers[pps_id]) {
3711
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS %u referenced\n", pps_id);
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        return -1;
    }
3714
    h->pps= *h0->pps_buffers[pps_id];
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3715

3716
    if(!h0->sps_buffers[h->pps.sps_id]) {
3717
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %u referenced\n", h->pps.sps_id);
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3718 3719
        return -1;
    }
3720
    h->sps = *h0->sps_buffers[h->pps.sps_id];
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3721

3722
    if(h == h0 && h->dequant_coeff_pps != pps_id){
3723
        h->dequant_coeff_pps = pps_id;
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        init_dequant_tables(h);
    }
3726

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3727
    s->mb_width= h->sps.mb_width;
3728
    s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3729

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    h->b_stride=  s->mb_width*4;
    h->b8_stride= s->mb_width*2;
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3732

3733
    s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
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3734
    if(h->sps.frame_mbs_only_flag)
3735
        s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
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3736
    else
3737
        s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3738 3739

    if (s->context_initialized
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3740
        && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3741 3742
        if(h != h0)
            return -1;   // width / height changed during parallelized decoding
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3743
        free_tables(h);
3744
        flush_dpb(s->avctx);
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        MPV_common_end(s);
    }
    if (!s->context_initialized) {
3748 3749
        if(h != h0)
            return -1;  // we cant (re-)initialize context during parallel decoding
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        if (MPV_common_init(s) < 0)
            return -1;
3752
        s->first_field = 0;
3753

3754
        init_scan_tables(h);
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        alloc_tables(h);

3757 3758 3759
        for(i = 1; i < s->avctx->thread_count; i++) {
            H264Context *c;
            c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3760
            memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
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            memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
            c->sps = h->sps;
            c->pps = h->pps;
            init_scan_tables(c);
            clone_tables(c, h);
        }

        for(i = 0; i < s->avctx->thread_count; i++)
            if(context_init(h->thread_context[i]) < 0)
                return -1;

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3772 3773
        s->avctx->width = s->width;
        s->avctx->height = s->height;
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3774
        s->avctx->sample_aspect_ratio= h->sps.sar;
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        if(!s->avctx->sample_aspect_ratio.den)
            s->avctx->sample_aspect_ratio.den = 1;
3777

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3778
        if(h->sps.timing_info_present_flag){
3779
            s->avctx->time_base= (AVRational){h->sps.num_units_in_tick, h->sps.time_scale};
3780 3781 3782 3783
            if(h->x264_build > 0 && h->x264_build < 44)
                s->avctx->time_base.den *= 2;
            av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
                      s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3784
        }
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    }

    h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);

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3789
    h->mb_mbaff = 0;
3790
    h->mb_aff_frame = 0;
3791
    last_pic_structure = s0->picture_structure;
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    if(h->sps.frame_mbs_only_flag){
        s->picture_structure= PICT_FRAME;
    }else{
3795
        if(get_bits1(&s->gb)) { //field_pic_flag
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3796
            s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3797
        } else {
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3798
            s->picture_structure= PICT_FRAME;
3799
            h->mb_aff_frame = h->sps.mb_aff;
3800
        }
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3801
    }
3802
    h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
3803 3804

    if(h0->current_slice == 0){
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        while(h->frame_num !=  h->prev_frame_num &&
              h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
            av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3808 3809
            if (frame_start(h) < 0)
                return -1;
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            h->prev_frame_num++;
            h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
            s->current_picture_ptr->frame_num= h->prev_frame_num;
            execute_ref_pic_marking(h, NULL, 0);
        }

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        /* See if we have a decoded first field looking for a pair... */
        if (s0->first_field) {
            assert(s0->current_picture_ptr);
            assert(s0->current_picture_ptr->data[0]);
            assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);

            /* figure out if we have a complementary field pair */
            if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
                /*
                 * Previous field is unmatched. Don't display it, but let it
                 * remain for reference if marked as such.
                 */
                s0->current_picture_ptr = NULL;
                s0->first_field = FIELD_PICTURE;

            } else {
                if (h->nal_ref_idc &&
                        s0->current_picture_ptr->reference &&
                        s0->current_picture_ptr->frame_num != h->frame_num) {
                    /*
                     * This and previous field were reference, but had
                     * different frame_nums. Consider this field first in
                     * pair. Throw away previous field except for reference
                     * purposes.
                     */
                    s0->first_field = 1;
                    s0->current_picture_ptr = NULL;

                } else {
                    /* Second field in complementary pair */
                    s0->first_field = 0;
                }
            }

        } else {
            /* Frame or first field in a potentially complementary pair */
            assert(!s0->current_picture_ptr);
            s0->first_field = FIELD_PICTURE;
        }

        if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
            s0->first_field = 0;
3858
            return -1;
3859
        }
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    }
    if(h != h0)
        clone_slice(h, h0);

    s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup

3866
    assert(s->mb_num == s->mb_width * s->mb_height);
3867
    if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3868 3869
       first_mb_in_slice                    >= s->mb_num){
        av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
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3870 3871
        return -1;
    }
3872
    s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3873 3874 3875
    s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
    if (s->picture_structure == PICT_BOTTOM_FIELD)
        s->resync_mb_y = s->mb_y = s->mb_y + 1;
3876
    assert(s->mb_y < s->mb_height);
3877

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    if(s->picture_structure==PICT_FRAME){
        h->curr_pic_num=   h->frame_num;
        h->max_pic_num= 1<< h->sps.log2_max_frame_num;
    }else{
3882
        h->curr_pic_num= 2*h->frame_num + 1;
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3883 3884
        h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
    }
3885

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3886
    if(h->nal_unit_type == NAL_IDR_SLICE){
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3887
        get_ue_golomb(&s->gb); /* idr_pic_id */
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3888
    }
3889

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3890 3891
    if(h->sps.poc_type==0){
        h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3892

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3893 3894 3895 3896
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
            h->delta_poc_bottom= get_se_golomb(&s->gb);
        }
    }
3897

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    if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
        h->delta_poc[0]= get_se_golomb(&s->gb);
3900

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3901 3902 3903
        if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
            h->delta_poc[1]= get_se_golomb(&s->gb);
    }
3904

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3905
    init_poc(h);
3906

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    if(h->pps.redundant_pic_cnt_present){
        h->redundant_pic_count= get_ue_golomb(&s->gb);
    }

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3911
    //set defaults, might be overridden a few lines later
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    h->ref_count[0]= h->pps.ref_count[0];
    h->ref_count[1]= h->pps.ref_count[1];

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3915
    if(h->slice_type_nos != FF_I_TYPE){
3916
        if(h->slice_type_nos == FF_B_TYPE){
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3917 3918 3919
            h->direct_spatial_mv_pred= get_bits1(&s->gb);
        }
        num_ref_idx_active_override_flag= get_bits1(&s->gb);
3920

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3921 3922
        if(num_ref_idx_active_override_flag){
            h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3923
            if(h->slice_type_nos==FF_B_TYPE)
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3924 3925
                h->ref_count[1]= get_ue_golomb(&s->gb) + 1;

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3926
            if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3927
                av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3928
                h->ref_count[0]= h->ref_count[1]= 1;
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3929 3930 3931
                return -1;
            }
        }
3932
        if(h->slice_type_nos == FF_B_TYPE)
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            h->list_count= 2;
        else
            h->list_count= 1;
    }else
        h->list_count= 0;
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3938

3939
    if(!default_ref_list_done){
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        fill_default_ref_list(h);
    }

3943
    if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3944
        return -1;
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3945

3946 3947
    if(h->slice_type_nos!=FF_I_TYPE){
        s->last_picture_ptr= &h->ref_list[0][0];
3948
        ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3949 3950 3951
    }
    if(h->slice_type_nos==FF_B_TYPE){
        s->next_picture_ptr= &h->ref_list[1][0];
3952
        ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3953 3954
    }

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3955
    if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3956
       ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
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3957
        pred_weight_table(h);
3958
    else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
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3959
        implicit_weight_table(h);
3960
    else {
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        h->use_weight = 0;
3962 3963 3964 3965 3966
        for (i = 0; i < 2; i++) {
            h->luma_weight_flag[i]   = 0;
            h->chroma_weight_flag[i] = 0;
        }
    }
3967

3968
    if(h->nal_ref_idc)
3969
        decode_ref_pic_marking(h0, &s->gb);
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3970

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3971 3972 3973
    if(FRAME_MBAFF)
        fill_mbaff_ref_list(h);

3974 3975 3976 3977
    if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
        direct_dist_scale_factor(h);
    direct_ref_list_init(h);

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3978
    if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
3979
        tmp = get_ue_golomb_31(&s->gb);
3980 3981 3982 3983 3984 3985
        if(tmp > 2){
            av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
            return -1;
        }
        h->cabac_init_idc= tmp;
    }
3986 3987

    h->last_qscale_diff = 0;
3988 3989 3990
    tmp = h->pps.init_qp + get_se_golomb(&s->gb);
    if(tmp>51){
        av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
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        return -1;
    }
3993
    s->qscale= tmp;
3994 3995
    h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
    h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
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    //FIXME qscale / qp ... stuff
3997
    if(h->slice_type == FF_SP_TYPE){
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        get_bits1(&s->gb); /* sp_for_switch_flag */
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    }
4000
    if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
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        get_se_golomb(&s->gb); /* slice_qs_delta */
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    }

4004
    h->deblocking_filter = 1;
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    h->slice_alpha_c0_offset = 0;
    h->slice_beta_offset = 0;
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4007
    if( h->pps.deblocking_filter_parameters_present ) {
4008
        tmp= get_ue_golomb_31(&s->gb);
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        if(tmp > 2){
            av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
            return -1;
        }
        h->deblocking_filter= tmp;
4014
        if(h->deblocking_filter < 2)
4015 4016 4017
            h->deblocking_filter^= 1; // 1<->0

        if( h->deblocking_filter ) {
4018 4019
            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
            h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
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4020
        }
4021
    }
4022

4023
    if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
4024
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
4025
       ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
4026 4027 4028
       ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
        h->deblocking_filter= 0;

4029
    if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
4030 4031
        if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
            /* Cheat slightly for speed:
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4032
               Do not bother to deblock across slices. */
4033 4034
            h->deblocking_filter = 2;
        } else {
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            h0->max_contexts = 1;
            if(!h0->single_decode_warning) {
                av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
                h0->single_decode_warning = 1;
            }
            if(h != h0)
                return 1; // deblocking switched inside frame
4042
        }
4043 4044
    }

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#if 0 //FMO
    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
        slice_group_change_cycle= get_bits(&s->gb, ?);
#endif

4050 4051
    h0->last_slice_type = slice_type;
    h->slice_num = ++h0->current_slice;
4052 4053 4054
    if(h->slice_num >= MAX_SLICES){
        av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
    }
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4055

4056
    for(j=0; j<2; j++){
4057
        int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
4058 4059
        ref2frm[0]=
        ref2frm[1]= -1;
4060
        for(i=0; i<16; i++)
4061 4062
            ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
                          +(h->ref_list[j][i].reference&3);
4063 4064 4065 4066 4067
        ref2frm[18+0]=
        ref2frm[18+1]= -1;
        for(i=16; i<48; i++)
            ref2frm[i+4]= 4*h->ref_list[j][i].frame_num
                          +(h->ref_list[j][i].reference&3);
4068 4069
    }

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4070
    h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
4071
    h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
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4072

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    s->avctx->refs= h->sps.ref_frame_count;

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4075
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
4076
        av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
4077 4078
               h->slice_num,
               (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
4079
               first_mb_in_slice,
4080
               av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
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4081 4082 4083 4084
               pps_id, h->frame_num,
               s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
               h->ref_count[0], h->ref_count[1],
               s->qscale,
4085
               h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
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4086
               h->use_weight,
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               h->use_weight==1 && h->use_weight_chroma ? "c" : "",
               h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
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4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100
               );
    }

    return 0;
}

/**
 *
 */
static inline int get_level_prefix(GetBitContext *gb){
    unsigned int buf;
    int log;
4101

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    OPEN_READER(re, gb);
    UPDATE_CACHE(re, gb);
    buf=GET_CACHE(re, gb);
4105

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    log= 32 - av_log2(buf);
#ifdef TRACE
    print_bin(buf>>(32-log), log);
4109
    av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
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#endif

    LAST_SKIP_BITS(re, gb, log);
    CLOSE_READER(re, gb);

    return log-1;
}

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4118
static inline int get_dct8x8_allowed(H264Context *h){
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    if(h->sps.direct_8x8_inference_flag)
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
    else
        return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
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}

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/**
 * decodes a residual block.
 * @param n block index
 * @param scantable scantable
 * @param max_coeff number of coefficients in the block
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 * @return <0 if an error occurred
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 */
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static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
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    MpegEncContext * const s = &h->s;
    static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
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    int level[16];
    int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
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    //FIXME put trailing_onex into the context

    if(n == CHROMA_DC_BLOCK_INDEX){
        coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
        total_coeff= coeff_token>>2;
4143
    }else{
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        if(n == LUMA_DC_BLOCK_INDEX){
            total_coeff= pred_non_zero_count(h, 0);
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
            total_coeff= coeff_token>>2;
        }else{
            total_coeff= pred_non_zero_count(h, n);
            coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
            total_coeff= coeff_token>>2;
            h->non_zero_count_cache[ scan8[n] ]= total_coeff;
        }
    }

    //FIXME set last_non_zero?

    if(total_coeff==0)
        return 0;
4160 4161
    if(total_coeff > (unsigned)max_coeff) {
        av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
4162 4163
        return -1;
    }
4164

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4165
    trailing_ones= coeff_token&3;
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    tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
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    assert(total_coeff<=16);
4168

4169 4170 4171 4172 4173
    i = show_bits(gb, 3);
    skip_bits(gb, trailing_ones);
    level[0] = 1-((i&4)>>1);
    level[1] = 1-((i&2)   );
    level[2] = 1-((i&1)<<1);
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4175
    if(trailing_ones<total_coeff) {
4176
        int mask, prefix;
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        int suffix_length = total_coeff > 10 && trailing_ones < 3;
4178 4179 4180 4181 4182 4183 4184 4185
        int bitsi= show_bits(gb, LEVEL_TAB_BITS);
        int level_code= cavlc_level_tab[suffix_length][bitsi][0];

        skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
        if(level_code >= 100){
            prefix= level_code - 100;
            if(prefix == LEVEL_TAB_BITS)
                prefix += get_level_prefix(gb);
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            //first coefficient has suffix_length equal to 0 or 1
            if(prefix<14){ //FIXME try to build a large unified VLC table for all this
                if(suffix_length)
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4190
                    level_code= (prefix<<1) + get_bits1(gb); //part
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                else
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                    level_code= prefix; //part
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            }else if(prefix==14){
                if(suffix_length)
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                    level_code= (prefix<<1) + get_bits1(gb); //part
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                else
                    level_code= prefix + get_bits(gb, 4); //part
            }else{
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                level_code= 30 + get_bits(gb, prefix-3); //part
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                if(prefix>=16)
                    level_code += (1<<(prefix-3))-4096;
            }
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4203

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4204
            if(trailing_ones < 3) level_code += 2;
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            suffix_length = 2;
            mask= -(level_code&1);
            level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask;
4209 4210 4211 4212 4213 4214 4215 4216
        }else{
            if(trailing_ones < 3) level_code += (level_code>>31)|1;

            suffix_length = 1;
            if(level_code + 3U > 6U)
                suffix_length++;
            level[trailing_ones]= level_code;
        }
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        //remaining coefficients have suffix_length > 0
4219
        for(i=trailing_ones+1;i<total_coeff;i++) {
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            static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX };
            int bitsi= show_bits(gb, LEVEL_TAB_BITS);
            level_code= cavlc_level_tab[suffix_length][bitsi][0];

            skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]);
            if(level_code >= 100){
                prefix= level_code - 100;
                if(prefix == LEVEL_TAB_BITS){
                    prefix += get_level_prefix(gb);
                }
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                if(prefix<15){
                    level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
                }else{
                    level_code = (15<<suffix_length) + get_bits(gb, prefix-3);
                    if(prefix>=16)
                        level_code += (1<<(prefix-3))-4096;
                }
                mask= -(level_code&1);
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                level_code= (((2+level_code)>>1) ^ mask) - mask;
            }
            level[i]= level_code;

            if(suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length])
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                suffix_length++;
        }
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    }

    if(total_coeff == max_coeff)
        zeros_left=0;
    else{
        if(n == CHROMA_DC_BLOCK_INDEX)
            zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
        else
            zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
    }

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    coeff_num = zeros_left + total_coeff - 1;
    j = scantable[coeff_num];
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    if(n > 24){
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        block[j] = level[0];
        for(i=1;i<total_coeff;i++) {
            if(zeros_left <= 0)
                run_before = 0;
            else if(zeros_left < 7){
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
            }else{
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
            }
            zeros_left -= run_before;
            coeff_num -= 1 + run_before;
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            j= scantable[ coeff_num ];

            block[j]= level[i];
        }
    }else{
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        block[j] = (level[0] * qmul[j] + 32)>>6;
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        for(i=1;i<total_coeff;i++) {
            if(zeros_left <= 0)
                run_before = 0;
            else if(zeros_left < 7){
                run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
            }else{
                run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
            }
            zeros_left -= run_before;
            coeff_num -= 1 + run_before;
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            j= scantable[ coeff_num ];

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            block[j]= (level[i] * qmul[j] + 32)>>6;
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        }
    }
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    if(zeros_left<0){
        av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
        return -1;
    }

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    return 0;
}

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static void predict_field_decoding_flag(H264Context *h){
    MpegEncContext * const s = &h->s;
4302
    const int mb_xy= h->mb_xy;
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4303 4304 4305 4306 4307 4308 4309 4310
    int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
                ? s->current_picture.mb_type[mb_xy-1]
                : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
                ? s->current_picture.mb_type[mb_xy-s->mb_stride]
                : 0;
    h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
}

4311 4312 4313 4314 4315
/**
 * decodes a P_SKIP or B_SKIP macroblock
 */
static void decode_mb_skip(H264Context *h){
    MpegEncContext * const s = &h->s;
4316
    const int mb_xy= h->mb_xy;
4317
    int mb_type=0;
4318

4319 4320 4321
    memset(h->non_zero_count[mb_xy], 0, 16);
    memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui

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4322
    if(MB_FIELD)
4323
        mb_type|= MB_TYPE_INTERLACED;
4324

4325
    if( h->slice_type_nos == FF_B_TYPE )
4326 4327
    {
        // just for fill_caches. pred_direct_motion will set the real mb_type
4328
        mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
4329

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michael committed
4330
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4331
        pred_direct_motion(h, &mb_type);
4332
        mb_type|= MB_TYPE_SKIP;
4333 4334 4335 4336
    }
    else
    {
        int mx, my;
4337
        mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
4338

michael's avatar
michael committed
4339
        fill_caches(h, mb_type, 0); //FIXME check what is needed and what not ...
4340 4341 4342 4343 4344 4345
        pred_pskip_motion(h, &mx, &my);
        fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
        fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
    }

    write_back_motion(h, mb_type);
4346
    s->current_picture.mb_type[mb_xy]= mb_type;
4347 4348
    s->current_picture.qscale_table[mb_xy]= s->qscale;
    h->slice_table[ mb_xy ]= h->slice_num;
4349
    h->prev_mb_skipped= 1;
4350 4351
}

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4352 4353
/**
 * decodes a macroblock
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4354
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
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4355
 */
4356
static int decode_mb_cavlc(H264Context *h){
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4357
    MpegEncContext * const s = &h->s;
4358
    int mb_xy;
4359 4360
    int partition_count;
    unsigned int mb_type, cbp;
lorenm's avatar
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4361
    int dct8x8_allowed= h->pps.transform_8x8_mode;
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4362

4363 4364
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;

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4365
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
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4366 4367
    cbp = 0; /* avoid warning. FIXME: find a solution without slowing
                down the code */
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4368
    if(h->slice_type_nos != FF_I_TYPE){
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4369 4370
        if(s->mb_skip_run==-1)
            s->mb_skip_run= get_ue_golomb(&s->gb);
4371

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michaelni committed
4372
        if (s->mb_skip_run--) {
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4373 4374 4375 4376 4377 4378
            if(FRAME_MBAFF && (s->mb_y&1) == 0){
                if(s->mb_skip_run==0)
                    h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
                else
                    predict_field_decoding_flag(h);
            }
4379
            decode_mb_skip(h);
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4380 4381 4382
            return 0;
        }
    }
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4383 4384 4385
    if(FRAME_MBAFF){
        if( (s->mb_y&1) == 0 )
            h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&s->gb);
4386
    }
4387

4388
    h->prev_mb_skipped= 0;
4389

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4390
    mb_type= get_ue_golomb(&s->gb);
4391
    if(h->slice_type_nos == FF_B_TYPE){
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4392 4393 4394 4395 4396 4397 4398
        if(mb_type < 23){
            partition_count= b_mb_type_info[mb_type].partition_count;
            mb_type=         b_mb_type_info[mb_type].type;
        }else{
            mb_type -= 23;
            goto decode_intra_mb;
        }
4399
    }else if(h->slice_type_nos == FF_P_TYPE){
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4400 4401 4402 4403 4404 4405 4406 4407
        if(mb_type < 5){
            partition_count= p_mb_type_info[mb_type].partition_count;
            mb_type=         p_mb_type_info[mb_type].type;
        }else{
            mb_type -= 5;
            goto decode_intra_mb;
        }
    }else{
4408 4409 4410
       assert(h->slice_type_nos == FF_I_TYPE);
        if(h->slice_type == FF_SI_TYPE && mb_type)
            mb_type--;
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4411 4412
decode_intra_mb:
        if(mb_type > 25){
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4413
            av_log(h->s.avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_pict_type_char(h->slice_type), s->mb_x, s->mb_y);
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4414 4415 4416 4417 4418 4419 4420 4421
            return -1;
        }
        partition_count=0;
        cbp= i_mb_type_info[mb_type].cbp;
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
        mb_type= i_mb_type_info[mb_type].type;
    }

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4422
    if(MB_FIELD)
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4423 4424 4425
        mb_type |= MB_TYPE_INTERLACED;

    h->slice_table[ mb_xy ]= h->slice_num;
4426

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michaelni committed
4427
    if(IS_INTRA_PCM(mb_type)){
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4428
        unsigned int x;
4429

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diego committed
4430
        // We assume these blocks are very rare so we do not optimize it.
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michaelni committed
4431
        align_get_bits(&s->gb);
4432

4433
        // The pixels are stored in the same order as levels in h->mb array.
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4434 4435
        for(x=0; x < (CHROMA ? 384 : 256); x++){
            ((uint8_t*)h->mb)[x]= get_bits(&s->gb, 8);
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michaelni committed
4436
        }
4437

4438
        // In deblocking, the quantizer is 0
4439
        s->current_picture.qscale_table[mb_xy]= 0;
4440
        // All coeffs are present
4441
        memset(h->non_zero_count[mb_xy], 16, 16);
4442

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lorenm committed
4443
        s->current_picture.mb_type[mb_xy]= mb_type;
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4444 4445
        return 0;
    }
4446

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4447 4448 4449 4450 4451
    if(MB_MBAFF){
        h->ref_count[0] <<= 1;
        h->ref_count[1] <<= 1;
    }

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4452
    fill_caches(h, mb_type, 0);
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4453 4454 4455

    //mb_pred
    if(IS_INTRA(mb_type)){
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4456
        int pred_mode;
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michaelni committed
4457
//            init_top_left_availability(h);
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michael committed
4458 4459 4460 4461 4462 4463 4464
        if(IS_INTRA4x4(mb_type)){
            int i;
            int di = 1;
            if(dct8x8_allowed && get_bits1(&s->gb)){
                mb_type |= MB_TYPE_8x8DCT;
                di = 4;
            }
michaelni's avatar
michaelni committed
4465 4466

//                fill_intra4x4_pred_table(h);
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4467 4468
            for(i=0; i<16; i+=di){
                int mode= pred_intra_mode(h, i);
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michaelni committed
4469

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4470 4471 4472
                if(!get_bits1(&s->gb)){
                    const int rem_mode= get_bits(&s->gb, 3);
                    mode = rem_mode + (rem_mode >= mode);
michaelni's avatar
michaelni committed
4473
                }
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michael committed
4474 4475 4476 4477 4478

                if(di==4)
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
                else
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = mode;
michaelni's avatar
michaelni committed
4479
            }
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michael committed
4480 4481 4482 4483 4484 4485 4486 4487 4488
            write_back_intra_pred_mode(h);
            if( check_intra4x4_pred_mode(h) < 0)
                return -1;
        }else{
            h->intra16x16_pred_mode= check_intra_pred_mode(h, h->intra16x16_pred_mode);
            if(h->intra16x16_pred_mode < 0)
                return -1;
        }
        if(CHROMA){
4489
            pred_mode= check_intra_pred_mode(h, get_ue_golomb_31(&s->gb));
4490
            if(pred_mode < 0)
michaelni's avatar
michaelni committed
4491
                return -1;
4492
            h->chroma_pred_mode= pred_mode;
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4493
        }
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michaelni committed
4494 4495
    }else if(partition_count==4){
        int i, j, sub_partition_count[4], list, ref[2][4];
4496

4497
        if(h->slice_type_nos == FF_B_TYPE){
michaelni's avatar
michaelni committed
4498
            for(i=0; i<4; i++){
4499
                h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
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michaelni committed
4500
                if(h->sub_mb_type[i] >=13){
4501
                    av_log(h->s.avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
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michaelni committed
4502 4503 4504 4505 4506
                    return -1;
                }
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
4507
            if(   IS_DIRECT(h->sub_mb_type[0]) || IS_DIRECT(h->sub_mb_type[1])
4508
               || IS_DIRECT(h->sub_mb_type[2]) || IS_DIRECT(h->sub_mb_type[3])) {
4509
                pred_direct_motion(h, &mb_type);
4510 4511 4512 4513 4514
                h->ref_cache[0][scan8[4]] =
                h->ref_cache[1][scan8[4]] =
                h->ref_cache[0][scan8[12]] =
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
            }
michaelni's avatar
michaelni committed
4515
        }else{
michael's avatar
michael committed
4516
            assert(h->slice_type_nos == FF_P_TYPE); //FIXME SP correct ?
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michaelni committed
4517
            for(i=0; i<4; i++){
4518
                h->sub_mb_type[i]= get_ue_golomb_31(&s->gb);
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michaelni committed
4519
                if(h->sub_mb_type[i] >=4){
4520
                    av_log(h->s.avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], s->mb_x, s->mb_y);
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michaelni committed
4521 4522 4523 4524 4525 4526
                    return -1;
                }
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
        }
4527

4528
        for(list=0; list<h->list_count; list++){
4529
            int ref_count= IS_REF0(mb_type) ? 1 : h->ref_count[list];
michaelni's avatar
michaelni committed
4530
            for(i=0; i<4; i++){
4531 4532
                if(IS_DIRECT(h->sub_mb_type[i])) continue;
                if(IS_DIR(h->sub_mb_type[i], 0, list)){
4533 4534 4535 4536 4537 4538 4539
                    unsigned int tmp;
                    if(ref_count == 1){
                        tmp= 0;
                    }else if(ref_count == 2){
                        tmp= get_bits1(&s->gb)^1;
                    }else{
                        tmp= get_ue_golomb_31(&s->gb);
michael's avatar
michael committed
4540 4541 4542 4543
                        if(tmp>=ref_count){
                            av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp);
                            return -1;
                        }
4544
                    }
4545
                    ref[list][i]= tmp;
michaelni's avatar
michaelni committed
4546 4547 4548 4549 4550 4551
                }else{
                 //FIXME
                    ref[list][i] = -1;
                }
            }
        }
4552

lorenm's avatar
lorenm committed
4553 4554
        if(dct8x8_allowed)
            dct8x8_allowed = get_dct8x8_allowed(h);
4555

4556
        for(list=0; list<h->list_count; list++){
michaelni's avatar
michaelni committed
4557
            for(i=0; i<4; i++){
4558 4559 4560 4561
                if(IS_DIRECT(h->sub_mb_type[i])) {
                    h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ];
                    continue;
                }
michaelni's avatar
michaelni committed
4562 4563 4564
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ]=
                h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];

4565
                if(IS_DIR(h->sub_mb_type[i], 0, list)){
michaelni's avatar
michaelni committed
4566 4567 4568 4569 4570 4571 4572 4573 4574
                    const int sub_mb_type= h->sub_mb_type[i];
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
                    for(j=0; j<sub_partition_count[i]; j++){
                        int mx, my;
                        const int index= 4*i + block_width*j;
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my);
                        mx += get_se_golomb(&s->gb);
                        my += get_se_golomb(&s->gb);
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mbardiaux committed
4575
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
4576

michaelni's avatar
michaelni committed
4577
                        if(IS_SUB_8X8(sub_mb_type)){
4578
                            mv_cache[ 1 ][0]=
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michaelni committed
4579
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
4580
                            mv_cache[ 1 ][1]=
michaelni's avatar
michaelni committed
4581 4582
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
                        }else if(IS_SUB_8X4(sub_mb_type)){
4583 4584
                            mv_cache[ 1 ][0]= mx;
                            mv_cache[ 1 ][1]= my;
michaelni's avatar
michaelni committed
4585
                        }else if(IS_SUB_4X8(sub_mb_type)){
4586 4587
                            mv_cache[ 8 ][0]= mx;
                            mv_cache[ 8 ][1]= my;
michaelni's avatar
michaelni committed
4588
                        }
4589 4590
                        mv_cache[ 0 ][0]= mx;
                        mv_cache[ 0 ][1]= my;
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michaelni committed
4591 4592 4593 4594 4595 4596 4597 4598
                    }
                }else{
                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
                    p[0] = p[1]=
                    p[8] = p[9]= 0;
                }
            }
        }
4599 4600
    }else if(IS_DIRECT(mb_type)){
        pred_direct_motion(h, &mb_type);
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lorenm committed
4601
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
4602
    }else{
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michaelni committed
4603 4604 4605
        int list, mx, my, i;
         //FIXME we should set ref_idx_l? to 0 if we use that later ...
        if(IS_16X16(mb_type)){
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michael committed
4606 4607
            for(list=0; list<h->list_count; list++){
                    unsigned int val;
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michaelni committed
4608
                    if(IS_DIR(mb_type, 0, list)){
4609 4610 4611 4612 4613
                        if(h->ref_count[list]==1){
                            val= 0;
                        }else if(h->ref_count[list]==2){
                            val= get_bits1(&s->gb)^1;
                        }else{
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michael committed
4614 4615 4616 4617 4618
                            val= get_ue_golomb_31(&s->gb);
                            if(val >= h->ref_count[list]){
                                av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
                                return -1;
                            }
4619
                        }
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lorenm committed
4620
                    }else
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michael committed
4621 4622
                        val= LIST_NOT_USED&0xFF;
                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1);
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michaelni committed
4623
            }
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michael committed
4624 4625
            for(list=0; list<h->list_count; list++){
                unsigned int val;
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4626 4627 4628 4629
                if(IS_DIR(mb_type, 0, list)){
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my);
                    mx += get_se_golomb(&s->gb);
                    my += get_se_golomb(&s->gb);
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mbardiaux committed
4630
                    tprintf(s->avctx, "final mv:%d %d\n", mx, my);
4631

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michael committed
4632
                    val= pack16to32(mx,my);
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lorenm committed
4633
                }else
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michael committed
4634 4635
                    val=0;
                fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, val, 4);
michaelni's avatar
michaelni committed
4636 4637 4638
            }
        }
        else if(IS_16X8(mb_type)){
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4639
            for(list=0; list<h->list_count; list++){
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michaelni committed
4640
                    for(i=0; i<2; i++){
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michael committed
4641
                        unsigned int val;
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michaelni committed
4642
                        if(IS_DIR(mb_type, i, list)){
4643 4644 4645 4646 4647
                            if(h->ref_count[list] == 1){
                                val= 0;
                            }else if(h->ref_count[list] == 2){
                                val= get_bits1(&s->gb)^1;
                            }else{
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michael committed
4648 4649 4650 4651 4652
                                val= get_ue_golomb_31(&s->gb);
                                if(val >= h->ref_count[list]){
                                    av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
                                    return -1;
                                }
4653
                            }
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lorenm committed
4654
                        }else
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4655 4656
                            val= LIST_NOT_USED&0xFF;
                        fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1);
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michaelni committed
4657 4658
                    }
            }
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4659
            for(list=0; list<h->list_count; list++){
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michaelni committed
4660
                for(i=0; i<2; i++){
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4661
                    unsigned int val;
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4662 4663 4664 4665
                    if(IS_DIR(mb_type, i, list)){
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my);
                        mx += get_se_golomb(&s->gb);
                        my += get_se_golomb(&s->gb);
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mbardiaux committed
4666
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
4667

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michael committed
4668
                        val= pack16to32(mx,my);
4669
                    }else
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4670 4671
                        val=0;
                    fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4);
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michaelni committed
4672 4673 4674 4675
                }
            }
        }else{
            assert(IS_8X16(mb_type));
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4676
            for(list=0; list<h->list_count; list++){
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michaelni committed
4677
                    for(i=0; i<2; i++){
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michael committed
4678
                        unsigned int val;
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michaelni committed
4679
                        if(IS_DIR(mb_type, i, list)){ //FIXME optimize
4680 4681 4682 4683 4684
                            if(h->ref_count[list]==1){
                                val= 0;
                            }else if(h->ref_count[list]==2){
                                val= get_bits1(&s->gb)^1;
                            }else{
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michael committed
4685 4686 4687 4688 4689
                                val= get_ue_golomb_31(&s->gb);
                                if(val >= h->ref_count[list]){
                                    av_log(h->s.avctx, AV_LOG_ERROR, "ref %u overflow\n", val);
                                    return -1;
                                }
4690
                            }
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lorenm committed
4691
                        }else
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michael committed
4692 4693
                            val= LIST_NOT_USED&0xFF;
                        fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1);
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                    }
            }
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4696
            for(list=0; list<h->list_count; list++){
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                for(i=0; i<2; i++){
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4698
                    unsigned int val;
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                    if(IS_DIR(mb_type, i, list)){
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my);
                        mx += get_se_golomb(&s->gb);
                        my += get_se_golomb(&s->gb);
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4703
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
4704

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4705
                        val= pack16to32(mx,my);
4706
                    }else
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                        val=0;
                    fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4);
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                }
            }
        }
    }
4713

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    if(IS_INTER(mb_type))
        write_back_motion(h, mb_type);
4716

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4717 4718 4719
    if(!IS_INTRA16x16(mb_type)){
        cbp= get_ue_golomb(&s->gb);
        if(cbp > 47){
4720
            av_log(h->s.avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, s->mb_x, s->mb_y);
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            return -1;
        }
4723

4724
        if(CHROMA){
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4725 4726
            if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp];
            else                     cbp= golomb_to_inter_cbp   [cbp];
4727 4728 4729 4730
        }else{
            if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp];
            else                     cbp= golomb_to_inter_cbp_gray[cbp];
        }
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4731
    }
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4732
    h->cbp = cbp;
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4733

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4734
    if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){
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4735
        if(get_bits1(&s->gb)){
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4736
            mb_type |= MB_TYPE_8x8DCT;
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            h->cbp_table[mb_xy]= cbp;
        }
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    }
    s->current_picture.mb_type[mb_xy]= mb_type;

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4742 4743
    if(cbp || IS_INTRA16x16(mb_type)){
        int i8x8, i4x4, chroma_idx;
4744
        int dquant;
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4745
        GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr;
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4746
        const uint8_t *scan, *scan8x8, *dc_scan;
4747

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//        fill_non_zero_count_cache(h);

        if(IS_INTERLACED(mb_type)){
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4751
            scan8x8= s->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0;
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4752
            scan= s->qscale ? h->field_scan : h->field_scan_q0;
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            dc_scan= luma_dc_field_scan;
        }else{
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4755
            scan8x8= s->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0;
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4756
            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
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            dc_scan= luma_dc_zigzag_scan;
        }

        dquant= get_se_golomb(&s->gb);

        if( dquant > 25 || dquant < -26 ){
4763
            av_log(h->s.avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, s->mb_x, s->mb_y);
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            return -1;
        }
4766

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        s->qscale += dquant;
        if(((unsigned)s->qscale) > 51){
            if(s->qscale<0) s->qscale+= 52;
            else            s->qscale-= 52;
        }
4772

4773 4774
        h->chroma_qp[0]= get_chroma_qp(h, 0, s->qscale);
        h->chroma_qp[1]= get_chroma_qp(h, 1, s->qscale);
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4775
        if(IS_INTRA16x16(mb_type)){
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4776
            if( decode_residual(h, h->intra_gb_ptr, h->mb, LUMA_DC_BLOCK_INDEX, dc_scan, h->dequant4_coeff[0][s->qscale], 16) < 0){
4777
                return -1; //FIXME continue if partitioned and other return -1 too
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4778 4779 4780 4781 4782 4783 4784 4785
            }

            assert((cbp&15) == 0 || (cbp&15) == 15);

            if(cbp&15){
                for(i8x8=0; i8x8<4; i8x8++){
                    for(i4x4=0; i4x4<4; i4x4++){
                        const int index= i4x4 + 4*i8x8;
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4786
                        if( decode_residual(h, h->intra_gb_ptr, h->mb + 16*index, index, scan + 1, h->dequant4_coeff[0][s->qscale], 15) < 0 ){
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                            return -1;
                        }
                    }
                }
            }else{
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4792
                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
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            }
        }else{
            for(i8x8=0; i8x8<4; i8x8++){
                if(cbp & (1<<i8x8)){
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4797 4798
                    if(IS_8x8DCT(mb_type)){
                        DCTELEM *buf = &h->mb[64*i8x8];
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4799
                        uint8_t *nnz;
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4800
                        for(i4x4=0; i4x4<4; i4x4++){
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4801
                            if( decode_residual(h, gb, buf, i4x4+4*i8x8, scan8x8+16*i4x4,
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4802
                                                h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 16) <0 )
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                                return -1;
                        }
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4805
                        nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
4806
                        nnz[0] += nnz[1] + nnz[8] + nnz[9];
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                    }else{
                        for(i4x4=0; i4x4<4; i4x4++){
                            const int index= i4x4 + 4*i8x8;
4810

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lorenm committed
4811
                            if( decode_residual(h, gb, h->mb + 16*index, index, scan, h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale], 16) <0 ){
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                                return -1;
                            }
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                        }
                    }
                }else{
                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
                }
            }
        }
4822

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4823 4824
        if(cbp&0x30){
            for(chroma_idx=0; chroma_idx<2; chroma_idx++)
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4825
                if( decode_residual(h, gb, h->mb + 256 + 16*4*chroma_idx, CHROMA_DC_BLOCK_INDEX, chroma_dc_scan, NULL, 4) < 0){
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                    return -1;
                }
        }

        if(cbp&0x20){
            for(chroma_idx=0; chroma_idx<2; chroma_idx++){
4832
                const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]];
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4833 4834
                for(i4x4=0; i4x4<4; i4x4++){
                    const int index= 16 + 4*chroma_idx + i4x4;
4835
                    if( decode_residual(h, gb, h->mb + 16*index, index, scan + 1, qmul, 15) < 0){
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                        return -1;
                    }
                }
            }
        }else{
            uint8_t * const nnz= &h->non_zero_count_cache[0];
            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
        }
    }else{
4846 4847 4848 4849
        uint8_t * const nnz= &h->non_zero_count_cache[0];
        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
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4850
    }
4851
    s->current_picture.qscale_table[mb_xy]= s->qscale;
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    write_back_non_zero_count(h);

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    if(MB_MBAFF){
        h->ref_count[0] >>= 1;
        h->ref_count[1] >>= 1;
    }

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    return 0;
}

4862 4863 4864 4865 4866 4867 4868 4869
static int decode_cabac_field_decoding_flag(H264Context *h) {
    MpegEncContext * const s = &h->s;
    const int mb_x = s->mb_x;
    const int mb_y = s->mb_y & ~1;
    const int mba_xy = mb_x - 1 +  mb_y   *s->mb_stride;
    const int mbb_xy = mb_x     + (mb_y-2)*s->mb_stride;

    unsigned int ctx = 0;
4870

4871 4872 4873 4874 4875 4876 4877
    if( h->slice_table[mba_xy] == h->slice_num && IS_INTERLACED( s->current_picture.mb_type[mba_xy] ) ) {
        ctx += 1;
    }
    if( h->slice_table[mbb_xy] == h->slice_num && IS_INTERLACED( s->current_picture.mb_type[mbb_xy] ) ) {
        ctx += 1;
    }

4878
    return get_cabac_noinline( &h->cabac, &h->cabac_state[70 + ctx] );
4879 4880
}

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static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_slice) {
    uint8_t *state= &h->cabac_state[ctx_base];
    int mb_type;
4884

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4885 4886
    if(intra_slice){
        MpegEncContext * const s = &h->s;
4887 4888
        const int mba_xy = h->left_mb_xy[0];
        const int mbb_xy = h->top_mb_xy;
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4889
        int ctx=0;
4890
        if( h->slice_table[mba_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mba_xy] ) )
4891
            ctx++;
4892
        if( h->slice_table[mbb_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mbb_xy] ) )
4893
            ctx++;
4894
        if( get_cabac_noinline( &h->cabac, &state[ctx] ) == 0 )
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            return 0;   /* I4x4 */
        state += 2;
    }else{
4898
        if( get_cabac_noinline( &h->cabac, &state[0] ) == 0 )
4899
            return 0;   /* I4x4 */
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4900
    }
4901

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    if( get_cabac_terminate( &h->cabac ) )
        return 25;  /* PCM */
4904

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4905
    mb_type = 1; /* I16x16 */
4906 4907 4908 4909 4910
    mb_type += 12 * get_cabac_noinline( &h->cabac, &state[1] ); /* cbp_luma != 0 */
    if( get_cabac_noinline( &h->cabac, &state[2] ) ) /* cbp_chroma */
        mb_type += 4 + 4 * get_cabac_noinline( &h->cabac, &state[2+intra_slice] );
    mb_type += 2 * get_cabac_noinline( &h->cabac, &state[3+intra_slice] );
    mb_type += 1 * get_cabac_noinline( &h->cabac, &state[3+2*intra_slice] );
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4911 4912
    return mb_type;
}
4913

4914
static int decode_cabac_mb_type_b( H264Context *h ) {
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4915 4916
    MpegEncContext * const s = &h->s;

4917 4918
        const int mba_xy = h->left_mb_xy[0];
        const int mbb_xy = h->top_mb_xy;
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        int ctx = 0;
        int bits;
4921
        assert(h->slice_type_nos == FF_B_TYPE);
4922

4923
        if( h->slice_table[mba_xy] == h->slice_num && !IS_DIRECT( s->current_picture.mb_type[mba_xy] ) )
4924
            ctx++;
4925
        if( h->slice_table[mbb_xy] == h->slice_num && !IS_DIRECT( s->current_picture.mb_type[mbb_xy] ) )
4926 4927
            ctx++;

4928
        if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) )
4929 4930
            return 0; /* B_Direct_16x16 */

4931 4932
        if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
            return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
4933 4934
        }

4935 4936 4937 4938
        bits = get_cabac_noinline( &h->cabac, &h->cabac_state[27+4] ) << 3;
        bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 2;
        bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 1;
        bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
4939 4940 4941
        if( bits < 8 )
            return bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
        else if( bits == 13 ) {
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4942
            return decode_cabac_intra_mb_type(h, 32, 0) + 23;
4943 4944 4945 4946 4947
        } else if( bits == 14 )
            return 11; /* B_L1_L0_8x16 */
        else if( bits == 15 )
            return 22; /* B_8x8 */

4948
        bits= ( bits<<1 ) | get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
4949
        return bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
4950 4951
}

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4952
static int decode_cabac_mb_skip( H264Context *h, int mb_x, int mb_y ) {
4953
    MpegEncContext * const s = &h->s;
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4954
    int mba_xy, mbb_xy;
4955 4956
    int ctx = 0;

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    if(FRAME_MBAFF){ //FIXME merge with the stuff in fill_caches?
        int mb_xy = mb_x + (mb_y&~1)*s->mb_stride;
        mba_xy = mb_xy - 1;
        if( (mb_y&1)
            && h->slice_table[mba_xy] == h->slice_num
            && MB_FIELD == !!IS_INTERLACED( s->current_picture.mb_type[mba_xy] ) )
            mba_xy += s->mb_stride;
        if( MB_FIELD ){
            mbb_xy = mb_xy - s->mb_stride;
            if( !(mb_y&1)
                && h->slice_table[mbb_xy] == h->slice_num
                && IS_INTERLACED( s->current_picture.mb_type[mbb_xy] ) )
                mbb_xy -= s->mb_stride;
        }else
            mbb_xy = mb_x + (mb_y-1)*s->mb_stride;
    }else{
4973
        int mb_xy = h->mb_xy;
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4974
        mba_xy = mb_xy - 1;
4975
        mbb_xy = mb_xy - (s->mb_stride << FIELD_PICTURE);
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    }

4978
    if( h->slice_table[mba_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mba_xy] ))
4979
        ctx++;
4980
    if( h->slice_table[mbb_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mbb_xy] ))
4981 4982
        ctx++;

4983
    if( h->slice_type_nos == FF_B_TYPE )
4984
        ctx += 13;
4985
    return get_cabac_noinline( &h->cabac, &h->cabac_state[11+ctx] );
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}

static int decode_cabac_mb_intra4x4_pred_mode( H264Context *h, int pred_mode ) {
    int mode = 0;

    if( get_cabac( &h->cabac, &h->cabac_state[68] ) )
        return pred_mode;

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    mode += 1 * get_cabac( &h->cabac, &h->cabac_state[69] );
    mode += 2 * get_cabac( &h->cabac, &h->cabac_state[69] );
    mode += 4 * get_cabac( &h->cabac, &h->cabac_state[69] );

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    if( mode >= pred_mode )
        return mode + 1;
    else
        return mode;
}

static int decode_cabac_mb_chroma_pre_mode( H264Context *h) {
5005 5006
    const int mba_xy = h->left_mb_xy[0];
    const int mbb_xy = h->top_mb_xy;
5007 5008 5009

    int ctx = 0;

5010
    /* No need to test for IS_INTRA4x4 and IS_INTRA16x16, as we set chroma_pred_mode_table to 0 */
5011
    if( h->slice_table[mba_xy] == h->slice_num && h->chroma_pred_mode_table[mba_xy] != 0 )
5012
        ctx++;
5013

5014
    if( h->slice_table[mbb_xy] == h->slice_num && h->chroma_pred_mode_table[mbb_xy] != 0 )
5015 5016
        ctx++;

5017
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
5018 5019
        return 0;

5020
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
5021
        return 1;
5022
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
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        return 2;
    else
        return 3;
}

static int decode_cabac_mb_cbp_luma( H264Context *h) {
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    int cbp_b, cbp_a, ctx, cbp = 0;

    cbp_a = h->slice_table[h->left_mb_xy[0]] == h->slice_num ? h->left_cbp : -1;
    cbp_b = h->slice_table[h->top_mb_xy]     == h->slice_num ? h->top_cbp  : -1;

    ctx = !(cbp_a & 0x02) + 2 * !(cbp_b & 0x04);
    cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]);
    ctx = !(cbp   & 0x01) + 2 * !(cbp_b & 0x08);
    cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 1;
    ctx = !(cbp_a & 0x08) + 2 * !(cbp   & 0x01);
    cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 2;
    ctx = !(cbp   & 0x04) + 2 * !(cbp   & 0x02);
    cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 3;
5042 5043 5044 5045 5046 5047
    return cbp;
}
static int decode_cabac_mb_cbp_chroma( H264Context *h) {
    int ctx;
    int cbp_a, cbp_b;

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    cbp_a = (h->left_cbp>>4)&0x03;
    cbp_b = (h-> top_cbp>>4)&0x03;
5050 5051 5052 5053

    ctx = 0;
    if( cbp_a > 0 ) ctx++;
    if( cbp_b > 0 ) ctx += 2;
5054
    if( get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
5055 5056 5057 5058 5059
        return 0;

    ctx = 4;
    if( cbp_a == 2 ) ctx++;
    if( cbp_b == 2 ) ctx += 2;
5060
    return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
5061 5062
}
static int decode_cabac_mb_dqp( H264Context *h) {
5063
    int   ctx= h->last_qscale_diff != 0;
5064 5065
    int   val = 0;

5066
    while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
5067
        ctx= 2+(ctx>>1);
5068
        val++;
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        if(val > 102) //prevent infinite loop
5070
            return INT_MIN;
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    }

    if( val&0x01 )
5074
        return   (val + 1)>>1 ;
5075
    else
5076
        return -((val + 1)>>1);
5077
}
5078
static int decode_cabac_p_mb_sub_type( H264Context *h ) {
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    if( get_cabac( &h->cabac, &h->cabac_state[21] ) )
        return 0;   /* 8x8 */
    if( !get_cabac( &h->cabac, &h->cabac_state[22] ) )
        return 1;   /* 8x4 */
    if( get_cabac( &h->cabac, &h->cabac_state[23] ) )
        return 2;   /* 4x8 */
    return 3;       /* 4x4 */
}
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static int decode_cabac_b_mb_sub_type( H264Context *h ) {
    int type;
    if( !get_cabac( &h->cabac, &h->cabac_state[36] ) )
        return 0;   /* B_Direct_8x8 */
    if( !get_cabac( &h->cabac, &h->cabac_state[37] ) )
5092
        return 1 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L0_8x8, B_L1_8x8 */
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    type = 3;
    if( get_cabac( &h->cabac, &h->cabac_state[38] ) ) {
        if( get_cabac( &h->cabac, &h->cabac_state[39] ) )
            return 11 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L1_4x4, B_Bi_4x4 */
        type += 4;
    }
    type += 2*get_cabac( &h->cabac, &h->cabac_state[39] );
    type +=   get_cabac( &h->cabac, &h->cabac_state[39] );
    return type;
}
5103

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5104
static inline int decode_cabac_mb_transform_size( H264Context *h ) {
5105
    return get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
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}

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static int decode_cabac_mb_ref( H264Context *h, int list, int n ) {
    int refa = h->ref_cache[list][scan8[n] - 1];
    int refb = h->ref_cache[list][scan8[n] - 8];
    int ref  = 0;
    int ctx  = 0;

5114
    if( h->slice_type_nos == FF_B_TYPE) {
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        if( refa > 0 && !h->direct_cache[scan8[n] - 1] )
            ctx++;
        if( refb > 0 && !h->direct_cache[scan8[n] - 8] )
            ctx += 2;
    } else {
        if( refa > 0 )
            ctx++;
        if( refb > 0 )
            ctx += 2;
    }
5125 5126 5127

    while( get_cabac( &h->cabac, &h->cabac_state[54+ctx] ) ) {
        ref++;
5128
        ctx = (ctx>>2)+4;
5129
        if(ref >= 32 /*h->ref_list[list]*/){
5130
            return -1;
5131
        }
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    }
    return ref;
}

static int decode_cabac_mb_mvd( H264Context *h, int list, int n, int l ) {
    int amvd = abs( h->mvd_cache[list][scan8[n] - 1][l] ) +
               abs( h->mvd_cache[list][scan8[n] - 8][l] );
    int ctxbase = (l == 0) ? 40 : 47;
5140 5141
    int mvd;
    int ctx = (amvd>2) + (amvd>32);
5142

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    if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+ctx]))
        return 0;

    mvd= 1;
    ctx= 3;
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    while( mvd < 9 && get_cabac( &h->cabac, &h->cabac_state[ctxbase+ctx] ) ) {
        mvd++;
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5150
        if( ctx < 6 )
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            ctx++;
    }

    if( mvd >= 9 ) {
        int k = 3;
        while( get_cabac_bypass( &h->cabac ) ) {
            mvd += 1 << k;
            k++;
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            if(k>24){
                av_log(h->s.avctx, AV_LOG_ERROR, "overflow in decode_cabac_mb_mvd\n");
                return INT_MIN;
            }
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        }
        while( k-- ) {
            if( get_cabac_bypass( &h->cabac ) )
                mvd += 1 << k;
        }
    }
5169
    return get_cabac_bypass_sign( &h->cabac, -mvd );
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}

5172
static av_always_inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx, int is_dc ) {
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5173
    int nza, nzb;
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    int ctx = 0;

5176
    if( is_dc ) {
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        if( cat == 0 ) {
            nza = h->left_cbp&0x100;
            nzb = h-> top_cbp&0x100;
        } else {
            nza = (h->left_cbp>>(6+idx))&0x01;
            nzb = (h-> top_cbp>>(6+idx))&0x01;
        }
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5184
    } else {
5185 5186 5187
        assert(cat == 1 || cat == 2 || cat == 4);
        nza = h->non_zero_count_cache[scan8[idx] - 1];
        nzb = h->non_zero_count_cache[scan8[idx] - 8];
5188
    }
5189

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    if( nza > 0 )
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        ctx++;

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5193
    if( nzb > 0 )
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        ctx += 2;

    return ctx + 4 * cat;
}

5199
DECLARE_ASM_CONST(1, uint8_t, last_coeff_flag_offset_8x8[63]) = {
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    0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
    5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
};

5206
static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff, int is_dc ) {
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    static const int significant_coeff_flag_offset[2][6] = {
      { 105+0, 105+15, 105+29, 105+44, 105+47, 402 },
      { 277+0, 277+15, 277+29, 277+44, 277+47, 436 }
    };
    static const int last_coeff_flag_offset[2][6] = {
      { 166+0, 166+15, 166+29, 166+44, 166+47, 417 },
      { 338+0, 338+15, 338+29, 338+44, 338+47, 451 }
    };
    static const int coeff_abs_level_m1_offset[6] = {
        227+0, 227+10, 227+20, 227+30, 227+39, 426
    };
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5218
    static const uint8_t significant_coeff_flag_offset_8x8[2][63] = {
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5219
      { 0, 1, 2, 3, 4, 5, 5, 4, 4, 3, 3, 4, 4, 4, 5, 5,
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        4, 4, 4, 4, 3, 3, 6, 7, 7, 7, 8, 9,10, 9, 8, 7,
        7, 6,11,12,13,11, 6, 7, 8, 9,14,10, 9, 8, 6,11,
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       12,13,11, 6, 9,14,10, 9,11,12,13,11,14,10,12 },
      { 0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 7, 8, 4, 5,
        6, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,11,12,11,
        9, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,13,13, 9,
        9,10,10, 8,13,13, 9, 9,10,10,14,14,14,14,14 }
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5227
    };
5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239
    /* node ctx: 0..3: abslevel1 (with abslevelgt1 == 0).
     * 4..7: abslevelgt1 + 3 (and abslevel1 doesn't matter).
     * map node ctx => cabac ctx for level=1 */
    static const uint8_t coeff_abs_level1_ctx[8] = { 1, 2, 3, 4, 0, 0, 0, 0 };
    /* map node ctx => cabac ctx for level>1 */
    static const uint8_t coeff_abs_levelgt1_ctx[8] = { 5, 5, 5, 5, 6, 7, 8, 9 };
    static const uint8_t coeff_abs_level_transition[2][8] = {
    /* update node ctx after decoding a level=1 */
        { 1, 2, 3, 3, 4, 5, 6, 7 },
    /* update node ctx after decoding a level>1 */
        { 4, 4, 4, 4, 5, 6, 7, 7 }
    };
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5240 5241

    int index[64];
5242

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5243
    int av_unused last;
5244
    int coeff_count = 0;
5245
    int node_ctx = 0;
5246

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    uint8_t *significant_coeff_ctx_base;
    uint8_t *last_coeff_ctx_base;
    uint8_t *abs_level_m1_ctx_base;
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5250

5251
#if !ARCH_X86
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#define CABAC_ON_STACK
#endif
#ifdef CABAC_ON_STACK
#define CC &cc
    CABACContext cc;
    cc.range     = h->cabac.range;
    cc.low       = h->cabac.low;
    cc.bytestream= h->cabac.bytestream;
#else
#define CC &h->cabac
#endif


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    /* cat: 0-> DC 16x16  n = 0
     *      1-> AC 16x16  n = luma4x4idx
     *      2-> Luma4x4   n = luma4x4idx
     *      3-> DC Chroma n = iCbCr
5269
     *      4-> AC Chroma n = 16 + 4 * iCbCr + chroma4x4idx
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5270
     *      5-> Luma8x8   n = 4 * luma8x8idx
5271 5272 5273
     */

    /* read coded block flag */
5274 5275
    if( is_dc || cat != 5 ) {
        if( get_cabac( CC, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n, is_dc ) ] ) == 0 ) {
5276 5277
            if( !is_dc )
                h->non_zero_count_cache[scan8[n]] = 0;
5278

5279 5280 5281 5282 5283
#ifdef CABAC_ON_STACK
            h->cabac.range     = cc.range     ;
            h->cabac.low       = cc.low       ;
            h->cabac.bytestream= cc.bytestream;
#endif
5284
            return;
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5285
        }
5286 5287
    }

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5288
    significant_coeff_ctx_base = h->cabac_state
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5289
        + significant_coeff_flag_offset[MB_FIELD][cat];
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5290
    last_coeff_ctx_base = h->cabac_state
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5291
        + last_coeff_flag_offset[MB_FIELD][cat];
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    abs_level_m1_ctx_base = h->cabac_state
        + coeff_abs_level_m1_offset[cat];

5295
    if( !is_dc && cat == 5 ) {
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#define DECODE_SIGNIFICANCE( coefs, sig_off, last_off ) \
        for(last= 0; last < coefs; last++) { \
            uint8_t *sig_ctx = significant_coeff_ctx_base + sig_off; \
5299
            if( get_cabac( CC, sig_ctx )) { \
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5300 5301
                uint8_t *last_ctx = last_coeff_ctx_base + last_off; \
                index[coeff_count++] = last; \
5302
                if( get_cabac( CC, last_ctx ) ) { \
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5303 5304 5305 5306
                    last= max_coeff; \
                    break; \
                } \
            } \
5307 5308 5309
        }\
        if( last == max_coeff -1 ) {\
            index[coeff_count++] = last;\
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5310
        }
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5311
        const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
5312
#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
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5313 5314
        coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);
    } else {
5315
        coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);
5316
#else
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5317 5318
        DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] );
    } else {
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5319
        DECODE_SIGNIFICANCE( max_coeff - 1, last, last );
5320
#endif
5321
    }
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5322
    assert(coeff_count > 0);
5323

5324
    if( is_dc ) {
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5325 5326 5327 5328
        if( cat == 0 )
            h->cbp_table[h->mb_xy] |= 0x100;
        else
            h->cbp_table[h->mb_xy] |= 0x40 << n;
5329
    } else {
5330 5331
        if( cat == 5 )
            fill_rectangle(&h->non_zero_count_cache[scan8[n]], 2, 2, 8, coeff_count, 1);
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5332
        else {
5333
            assert( cat == 1 || cat == 2 || cat == 4 );
5334
            h->non_zero_count_cache[scan8[n]] = coeff_count;
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5335
        }
5336
    }
5337

5338
    do {
5339 5340
        uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base;

5341
        int j= scantable[index[--coeff_count]];
5342

5343
        if( get_cabac( CC, ctx ) == 0 ) {
5344
            node_ctx = coeff_abs_level_transition[0][node_ctx];
5345
            if( is_dc ) {
5346
                block[j] = get_cabac_bypass_sign( CC, -1);
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5347
            }else{
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5348
                block[j] = (get_cabac_bypass_sign( CC, -qmul[j]) + 32) >> 6;
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5349
            }
5350
        } else {
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5351
            int coeff_abs = 2;
5352 5353 5354
            ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base;
            node_ctx = coeff_abs_level_transition[1][node_ctx];

5355
            while( coeff_abs < 15 && get_cabac( CC, ctx ) ) {
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5356
                coeff_abs++;
5357 5358
            }

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5359 5360
            if( coeff_abs >= 15 ) {
                int j = 0;
5361
                while( get_cabac_bypass( CC ) ) {
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5362 5363
                    j++;
                }
5364

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5365
                coeff_abs=1;
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5366
                while( j-- ) {
5367
                    coeff_abs += coeff_abs + get_cabac_bypass( CC );
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5368
                }
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5369
                coeff_abs+= 14;
5370 5371
            }

5372
            if( is_dc ) {
5373
                block[j] = get_cabac_bypass_sign( CC, -coeff_abs );
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5374
            }else{
5375
                block[j] = (get_cabac_bypass_sign( CC, -coeff_abs ) * qmul[j] + 32) >> 6;
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5376
            }
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5377
        }
5378
    } while( coeff_count );
5379 5380 5381 5382 5383
#ifdef CABAC_ON_STACK
            h->cabac.range     = cc.range     ;
            h->cabac.low       = cc.low       ;
            h->cabac.bytestream= cc.bytestream;
#endif
5384

5385 5386
}

5387
#if !CONFIG_SMALL
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static void decode_cabac_residual_dc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
    decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 1);
}

static void decode_cabac_residual_nondc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
    decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 0);
}
#endif

static void decode_cabac_residual( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
5398
#if CONFIG_SMALL
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    decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, cat == 0 || cat == 3);
#else
    if( cat == 0 || cat == 3 ) decode_cabac_residual_dc(h, block, cat, n, scantable, qmul, max_coeff);
    else decode_cabac_residual_nondc(h, block, cat, n, scantable, qmul, max_coeff);
#endif
}

5406
static inline void compute_mb_neighbors(H264Context *h)
5407 5408
{
    MpegEncContext * const s = &h->s;
5409
    const int mb_xy  = h->mb_xy;
5410 5411
    h->top_mb_xy     = mb_xy - s->mb_stride;
    h->left_mb_xy[0] = mb_xy - 1;
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5412
    if(FRAME_MBAFF){
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        const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
        const int top_pair_xy      = pair_xy     - s->mb_stride;
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        const int top_mb_field_flag  = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
        const int left_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
        const int curr_mb_field_flag = MB_FIELD;
5418
        const int bottom = (s->mb_y & 1);
5419

5420
        if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
5421 5422
            h->top_mb_xy -= s->mb_stride;
        }
5423
        if (!left_mb_field_flag == curr_mb_field_flag) {
5424 5425
            h->left_mb_xy[0] = pair_xy - 1;
        }
5426 5427
    } else if (FIELD_PICTURE) {
        h->top_mb_xy -= s->mb_stride;
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    }
    return;
}

5432 5433
/**
 * decodes a macroblock
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5434
 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
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 */
static int decode_mb_cabac(H264Context *h) {
    MpegEncContext * const s = &h->s;
5438
    int mb_xy;
5439
    int mb_type, partition_count, cbp = 0;
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    int dct8x8_allowed= h->pps.transform_8x8_mode;
5441

5442 5443
    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;

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5444
    tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
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5445
    if( h->slice_type_nos != FF_I_TYPE ) {
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        int skip;
        /* a skipped mb needs the aff flag from the following mb */
        if( FRAME_MBAFF && s->mb_x==0 && (s->mb_y&1)==0 )
            predict_field_decoding_flag(h);
        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )
            skip = h->next_mb_skipped;
        else
            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );
5454
        /* read skip flags */
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5455 5456 5457 5458
        if( skip ) {
            if( FRAME_MBAFF && (s->mb_y&1)==0 ){
                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;
                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );
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5459
                if(!h->next_mb_skipped)
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5460 5461 5462
                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
            }

5463
            decode_mb_skip(h);
5464 5465

            h->cbp_table[mb_xy] = 0;
5466
            h->chroma_pred_mode_table[mb_xy] = 0;
5467 5468 5469 5470 5471 5472
            h->last_qscale_diff = 0;

            return 0;

        }
    }
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5473 5474 5475
    if(FRAME_MBAFF){
        if( (s->mb_y&1) == 0 )
            h->mb_mbaff =
5476
            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
5477
    }
5478

5479
    h->prev_mb_skipped = 0;
5480

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5481
    compute_mb_neighbors(h);
5482

5483
    if( h->slice_type_nos == FF_B_TYPE ) {
5484
        mb_type = decode_cabac_mb_type_b( h );
5485 5486 5487 5488 5489 5490 5491
        if( mb_type < 23 ){
            partition_count= b_mb_type_info[mb_type].partition_count;
            mb_type=         b_mb_type_info[mb_type].type;
        }else{
            mb_type -= 23;
            goto decode_intra_mb;
        }
5492
    } else if( h->slice_type_nos == FF_P_TYPE ) {
5493 5494 5495 5496 5497 5498 5499 5500 5501
        if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
            /* P-type */
            if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
                /* P_L0_D16x16, P_8x8 */
                mb_type= 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
            } else {
                /* P_L0_D8x16, P_L0_D16x8 */
                mb_type= 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
            }
5502 5503 5504
            partition_count= p_mb_type_info[mb_type].partition_count;
            mb_type=         p_mb_type_info[mb_type].type;
        } else {
5505
            mb_type= decode_cabac_intra_mb_type(h, 17, 0);
5506 5507 5508
            goto decode_intra_mb;
        }
    } else {
5509
        mb_type= decode_cabac_intra_mb_type(h, 3, 1);
5510 5511 5512
        if(h->slice_type == FF_SI_TYPE && mb_type)
            mb_type--;
        assert(h->slice_type_nos == FF_I_TYPE);
5513 5514 5515 5516 5517 5518
decode_intra_mb:
        partition_count = 0;
        cbp= i_mb_type_info[mb_type].cbp;
        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
        mb_type= i_mb_type_info[mb_type].type;
    }
lorenm's avatar
lorenm committed
5519
    if(MB_FIELD)
5520 5521 5522 5523 5524
        mb_type |= MB_TYPE_INTERLACED;

    h->slice_table[ mb_xy ]= h->slice_num;

    if(IS_INTRA_PCM(mb_type)) {
5525
        const uint8_t *ptr;
5526

diego's avatar
diego committed
5527
        // We assume these blocks are very rare so we do not optimize it.
5528 5529 5530
        // FIXME The two following lines get the bitstream position in the cabac
        // decode, I think it should be done by a function in cabac.h (or cabac.c).
        ptr= h->cabac.bytestream;
5531 5532 5533 5534
        if(h->cabac.low&0x1) ptr--;
        if(CABAC_BITS==16){
            if(h->cabac.low&0x1FF) ptr--;
        }
5535 5536

        // The pixels are stored in the same order as levels in h->mb array.
michael's avatar
michael committed
5537
        memcpy(h->mb, ptr, 256); ptr+=256;
5538
        if(CHROMA){
michael's avatar
michael committed
5539
            memcpy(h->mb+128, ptr, 128); ptr+=128;
5540 5541 5542 5543
        }

        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);

5544
        // All blocks are present
5545
        h->cbp_table[mb_xy] = 0x1ef;
5546
        h->chroma_pred_mode_table[mb_xy] = 0;
5547
        // In deblocking, the quantizer is 0
5548
        s->current_picture.qscale_table[mb_xy]= 0;
5549
        // All coeffs are present
5550
        memset(h->non_zero_count[mb_xy], 16, 16);
lorenm's avatar
lorenm committed
5551
        s->current_picture.mb_type[mb_xy]= mb_type;
5552
        h->last_qscale_diff = 0;
5553
        return 0;
5554 5555
    }

lorenm's avatar
lorenm committed
5556 5557 5558 5559 5560
    if(MB_MBAFF){
        h->ref_count[0] <<= 1;
        h->ref_count[1] <<= 1;
    }

michael's avatar
michael committed
5561
    fill_caches(h, mb_type, 0);
5562 5563

    if( IS_INTRA( mb_type ) ) {
5564
        int i, pred_mode;
5565
        if( IS_INTRA4x4( mb_type ) ) {
lorenm's avatar
lorenm committed
5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576
            if( dct8x8_allowed && decode_cabac_mb_transform_size( h ) ) {
                mb_type |= MB_TYPE_8x8DCT;
                for( i = 0; i < 16; i+=4 ) {
                    int pred = pred_intra_mode( h, i );
                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
                }
            } else {
                for( i = 0; i < 16; i++ ) {
                    int pred = pred_intra_mode( h, i );
                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );
5577 5578

                //av_log( s->avctx, AV_LOG_ERROR, "i4x4 pred=%d mode=%d\n", pred, h->intra4x4_pred_mode_cache[ scan8[i] ] );
lorenm's avatar
lorenm committed
5579
                }
5580 5581 5582 5583 5584 5585 5586
            }
            write_back_intra_pred_mode(h);
            if( check_intra4x4_pred_mode(h) < 0 ) return -1;
        } else {
            h->intra16x16_pred_mode= check_intra_pred_mode( h, h->intra16x16_pred_mode );
            if( h->intra16x16_pred_mode < 0 ) return -1;
        }
5587
        if(CHROMA){
michael's avatar
michael committed
5588 5589
            h->chroma_pred_mode_table[mb_xy] =
            pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );
5590

michael's avatar
michael committed
5591 5592 5593
            pred_mode= check_intra_pred_mode( h, pred_mode );
            if( pred_mode < 0 ) return -1;
            h->chroma_pred_mode= pred_mode;
5594
        }
5595
    } else if( partition_count == 4 ) {
5596 5597
        int i, j, sub_partition_count[4], list, ref[2][4];

5598
        if( h->slice_type_nos == FF_B_TYPE ) {
5599 5600 5601 5602 5603
            for( i = 0; i < 4; i++ ) {
                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
lorenm's avatar
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5604 5605
            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |
                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {
5606
                pred_direct_motion(h, &mb_type);
5607 5608 5609 5610
                h->ref_cache[0][scan8[4]] =
                h->ref_cache[1][scan8[4]] =
                h->ref_cache[0][scan8[12]] =
                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
5611 5612 5613 5614 5615 5616
                if( h->ref_count[0] > 1 || h->ref_count[1] > 1 ) {
                    for( i = 0; i < 4; i++ )
                        if( IS_DIRECT(h->sub_mb_type[i]) )
                            fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, 1, 1 );
                }
            }
5617 5618 5619 5620 5621 5622
        } else {
            for( i = 0; i < 4; i++ ) {
                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );
                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
            }
5623 5624
        }

5625
        for( list = 0; list < h->list_count; list++ ) {
5626
                for( i = 0; i < 4; i++ ) {
5627 5628
                    if(IS_DIRECT(h->sub_mb_type[i])) continue;
                    if(IS_DIR(h->sub_mb_type[i], 0, list)){
5629
                        if( h->ref_count[list] > 1 ){
5630
                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );
5631 5632 5633 5634 5635
                            if(ref[list][i] >= (unsigned)h->ref_count[list]){
                                av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref[list][i], h->ref_count[list]);
                                return -1;
                            }
                        }else
5636 5637 5638 5639
                            ref[list][i] = 0;
                    } else {
                        ref[list][i] = -1;
                    }
michael's avatar
1000l  
michael committed
5640
                                                       h->ref_cache[list][ scan8[4*i]+1 ]=
5641 5642 5643 5644
                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
                }
        }

lorenm's avatar
lorenm committed
5645 5646 5647
        if(dct8x8_allowed)
            dct8x8_allowed = get_dct8x8_allowed(h);

5648
        for(list=0; list<h->list_count; list++){
5649
            for(i=0; i<4; i++){
5650
                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];
5651 5652 5653 5654
                if(IS_DIRECT(h->sub_mb_type[i])){
                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 4);
                    continue;
                }
5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668

                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){
                    const int sub_mb_type= h->sub_mb_type[i];
                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
                    for(j=0; j<sub_partition_count[i]; j++){
                        int mpx, mpy;
                        int mx, my;
                        const int index= 4*i + block_width*j;
                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
                        int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);

                        mx = mpx + decode_cabac_mb_mvd( h, list, index, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, index, 1 );
mbardiaux's avatar
mbardiaux committed
5669
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
5670 5671

                        if(IS_SUB_8X8(sub_mb_type)){
5672
                            mv_cache[ 1 ][0]=
5673
                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
5674
                            mv_cache[ 1 ][1]=
5675 5676
                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;

5677
                            mvd_cache[ 1 ][0]=
5678
                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mx - mpx;
5679
                            mvd_cache[ 1 ][1]=
5680 5681
                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= my - mpy;
                        }else if(IS_SUB_8X4(sub_mb_type)){
5682 5683
                            mv_cache[ 1 ][0]= mx;
                            mv_cache[ 1 ][1]= my;
5684

5685 5686
                            mvd_cache[ 1 ][0]= mx - mpx;
                            mvd_cache[ 1 ][1]= my - mpy;
5687
                        }else if(IS_SUB_4X8(sub_mb_type)){
5688 5689
                            mv_cache[ 8 ][0]= mx;
                            mv_cache[ 8 ][1]= my;
5690

5691 5692
                            mvd_cache[ 8 ][0]= mx - mpx;
                            mvd_cache[ 8 ][1]= my - mpy;
5693
                        }
5694 5695 5696 5697 5698
                        mv_cache[ 0 ][0]= mx;
                        mv_cache[ 0 ][1]= my;

                        mvd_cache[ 0 ][0]= mx - mpx;
                        mvd_cache[ 0 ][1]= my - mpy;
5699 5700 5701 5702 5703 5704 5705 5706 5707
                    }
                }else{
                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
                    uint32_t *pd= (uint32_t *)&h->mvd_cache[list][ scan8[4*i] ][0];
                    p[0] = p[1] = p[8] = p[9] = 0;
                    pd[0]= pd[1]= pd[8]= pd[9]= 0;
                }
            }
        }
5708 5709 5710 5711
    } else if( IS_DIRECT(mb_type) ) {
        pred_direct_motion(h, &mb_type);
        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 4);
        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);
lorenm's avatar
lorenm committed
5712
        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
5713
    } else {
5714 5715
        int list, mx, my, i, mpx, mpy;
        if(IS_16X16(mb_type)){
michael's avatar
michael committed
5716
            for(list=0; list<h->list_count; list++){
5717
                if(IS_DIR(mb_type, 0, list)){
5718 5719 5720 5721 5722 5723 5724 5725 5726
                    int ref;
                    if(h->ref_count[list] > 1){
                        ref= decode_cabac_mb_ref(h, list, 0);
                        if(ref >= (unsigned)h->ref_count[list]){
                            av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
                            return -1;
                        }
                    }else
                        ref=0;
5727
                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);
lorenm's avatar
lorenm committed
5728
                }else
michael's avatar
michael committed
5729
                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1); //FIXME factorize and the other fill_rect below too
5730
            }
michael's avatar
michael committed
5731
            for(list=0; list<h->list_count; list++){
5732 5733 5734 5735 5736
                if(IS_DIR(mb_type, 0, list)){
                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);

                    mx = mpx + decode_cabac_mb_mvd( h, list, 0, 0 );
                    my = mpy + decode_cabac_mb_mvd( h, list, 0, 1 );
mbardiaux's avatar
mbardiaux committed
5737
                    tprintf(s->avctx, "final mv:%d %d\n", mx, my);
5738 5739 5740

                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
lorenm's avatar
lorenm committed
5741 5742
                }else
                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);
5743 5744 5745
            }
        }
        else if(IS_16X8(mb_type)){
5746
            for(list=0; list<h->list_count; list++){
5747 5748
                    for(i=0; i<2; i++){
                        if(IS_DIR(mb_type, i, list)){
5749 5750 5751 5752 5753 5754 5755 5756 5757
                            int ref;
                            if(h->ref_count[list] > 1){
                                ref= decode_cabac_mb_ref( h, list, 8*i );
                                if(ref >= (unsigned)h->ref_count[list]){
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
                                    return -1;
                                }
                            }else
                                ref=0;
5758
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);
5759 5760
                        }else
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);
5761 5762
                    }
            }
5763
            for(list=0; list<h->list_count; list++){
5764 5765 5766 5767 5768
                for(i=0; i<2; i++){
                    if(IS_DIR(mb_type, i, list)){
                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);
                        mx = mpx + decode_cabac_mb_mvd( h, list, 8*i, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, 8*i, 1 );
mbardiaux's avatar
mbardiaux committed
5769
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
5770 5771 5772

                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx-mpx,my-mpy), 4);
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
lorenm's avatar
lorenm committed
5773
                    }else{
5774 5775
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
5776 5777 5778 5779 5780
                    }
                }
            }
        }else{
            assert(IS_8X16(mb_type));
5781
            for(list=0; list<h->list_count; list++){
5782 5783
                    for(i=0; i<2; i++){
                        if(IS_DIR(mb_type, i, list)){ //FIXME optimize
5784 5785 5786 5787 5788 5789 5790 5791 5792
                            int ref;
                            if(h->ref_count[list] > 1){
                                ref= decode_cabac_mb_ref( h, list, 4*i );
                                if(ref >= (unsigned)h->ref_count[list]){
                                    av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
                                    return -1;
                                }
                            }else
                                ref=0;
5793
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);
5794 5795
                        }else
                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);
5796 5797
                    }
            }
5798
            for(list=0; list<h->list_count; list++){
5799 5800 5801 5802 5803 5804
                for(i=0; i<2; i++){
                    if(IS_DIR(mb_type, i, list)){
                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);
                        mx = mpx + decode_cabac_mb_mvd( h, list, 4*i, 0 );
                        my = mpy + decode_cabac_mb_mvd( h, list, 4*i, 1 );

mbardiaux's avatar
mbardiaux committed
5805
                        tprintf(s->avctx, "final mv:%d %d\n", mx, my);
5806 5807
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
lorenm's avatar
lorenm committed
5808
                    }else{
5809 5810
                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
5811 5812 5813 5814
                    }
                }
            }
        }
5815 5816
    }

5817 5818
   if( IS_INTER( mb_type ) ) {
        h->chroma_pred_mode_table[mb_xy] = 0;
5819
        write_back_motion( h, mb_type );
5820
   }
5821 5822 5823

    if( !IS_INTRA16x16( mb_type ) ) {
        cbp  = decode_cabac_mb_cbp_luma( h );
5824
        if(CHROMA)
michael's avatar
michael committed
5825
            cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
5826 5827
    }

lorenm's avatar
lorenm committed
5828
    h->cbp_table[mb_xy] = h->cbp = cbp;
5829

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lorenm committed
5830 5831 5832 5833 5834 5835
    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
        if( decode_cabac_mb_transform_size( h ) )
            mb_type |= MB_TYPE_8x8DCT;
    }
    s->current_picture.mb_type[mb_xy]= mb_type;

5836
    if( cbp || IS_INTRA16x16( mb_type ) ) {
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5837
        const uint8_t *scan, *scan8x8, *dc_scan;
5838
        const uint32_t *qmul;
5839 5840 5841
        int dqp;

        if(IS_INTERLACED(mb_type)){
lorenm's avatar
lorenm committed
5842
            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
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lorenm committed
5843
            scan= s->qscale ? h->field_scan : h->field_scan_q0;
5844 5845
            dc_scan= luma_dc_field_scan;
        }else{
lorenm's avatar
lorenm committed
5846
            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;
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lorenm committed
5847
            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
5848 5849 5850 5851
            dc_scan= luma_dc_zigzag_scan;
        }

        h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );
5852 5853 5854 5855
        if( dqp == INT_MIN ){
            av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
            return -1;
        }
5856 5857 5858 5859 5860
        s->qscale += dqp;
        if(((unsigned)s->qscale) > 51){
            if(s->qscale<0) s->qscale+= 52;
            else            s->qscale-= 52;
        }
5861 5862
        h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
        h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
5863 5864 5865 5866

        if( IS_INTRA16x16( mb_type ) ) {
            int i;
            //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 DC\n" );
5867 5868
            decode_cabac_residual( h, h->mb, 0, 0, dc_scan, NULL, 16);

5869
            if( cbp&15 ) {
5870
                qmul = h->dequant4_coeff[0][s->qscale];
5871 5872
                for( i = 0; i < 16; i++ ) {
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
5873
                    decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
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                }
            } else {
                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
            }
        } else {
            int i8x8, i4x4;
            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {
                if( cbp & (1<<i8x8) ) {
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5882
                    if( IS_8x8DCT(mb_type) ) {
5883 5884
                        decode_cabac_residual(h, h->mb + 64*i8x8, 5, 4*i8x8,
                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);
5885
                    } else {
andoma's avatar
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5886 5887 5888 5889
                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];
                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {
                            const int index = 4*i8x8 + i4x4;
                            //av_log( s->avctx, AV_LOG_ERROR, "Luma4x4: %d\n", index );
5890
//START_TIMER
andoma's avatar
andoma committed
5891
                            decode_cabac_residual(h, h->mb + 16*index, 2, index, scan, qmul, 16);
5892
//STOP_TIMER("decode_residual")
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5893
                        }
5894
                    }
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                } else {
                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
                }
            }
        }

        if( cbp&0x30 ){
            int c;
            for( c = 0; c < 2; c++ ) {
                //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-DC\n",c );
5906
                decode_cabac_residual(h, h->mb + 256 + 16*4*c, 3, c, chroma_dc_scan, NULL, 4);
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            }
        }

        if( cbp&0x20 ) {
            int c, i;
            for( c = 0; c < 2; c++ ) {
5913
                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];
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                for( i = 0; i < 4; i++ ) {
                    const int index = 16 + 4 * c + i;
                    //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 );
5917
                    decode_cabac_residual(h, h->mb + 16*index, 4, index, scan + 1, qmul, 15);
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                }
            }
        } else {
            uint8_t * const nnz= &h->non_zero_count_cache[0];
            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
        }
    } else {
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        uint8_t * const nnz= &h->non_zero_count_cache[0];
        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
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lorenm committed
5930
        h->last_qscale_diff = 0;
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    }

    s->current_picture.qscale_table[mb_xy]= s->qscale;
    write_back_non_zero_count(h);

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    if(MB_MBAFF){
        h->ref_count[0] >>= 1;
        h->ref_count[1] >>= 1;
    }

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    return 0;
}


5945
static void filter_mb_edgev( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
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    const int index_a = qp + h->slice_alpha_c0_offset;
    const int alpha = (alpha_table+52)[index_a];
    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
5949

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5950
    if( bS[0] < 4 ) {
5951
        int8_t tc[4];
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5952 5953 5954 5955
        tc[0] = (tc0_table+52)[index_a][bS[0]];
        tc[1] = (tc0_table+52)[index_a][bS[1]];
        tc[2] = (tc0_table+52)[index_a][bS[2]];
        tc[3] = (tc0_table+52)[index_a][bS[3]];
lorenm's avatar
lorenm committed
5956 5957
        h->s.dsp.h264_h_loop_filter_luma(pix, stride, alpha, beta, tc);
    } else {
5958
        h->s.dsp.h264_h_loop_filter_luma_intra(pix, stride, alpha, beta);
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    }
}
5961
static void filter_mb_edgecv( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
5962 5963 5964
    const int index_a = qp + h->slice_alpha_c0_offset;
    const int alpha = (alpha_table+52)[index_a];
    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
5965

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lorenm committed
5966
    if( bS[0] < 4 ) {
5967
        int8_t tc[4];
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darkshikari committed
5968 5969 5970 5971
        tc[0] = (tc0_table+52)[index_a][bS[0]]+1;
        tc[1] = (tc0_table+52)[index_a][bS[1]]+1;
        tc[2] = (tc0_table+52)[index_a][bS[2]]+1;
        tc[3] = (tc0_table+52)[index_a][bS[3]]+1;
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5972 5973
        h->s.dsp.h264_h_loop_filter_chroma(pix, stride, alpha, beta, tc);
    } else {
5974
        h->s.dsp.h264_h_loop_filter_chroma_intra(pix, stride, alpha, beta);
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    }
}

5978
static void filter_mb_mbaff_edgev( H264Context *h, uint8_t *pix, int stride, int16_t bS[8], int qp[2] ) {
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    int i;
    for( i = 0; i < 16; i++, pix += stride) {
        int index_a;
        int alpha;
        int beta;
5984

5985 5986
        int qp_index;
        int bS_index = (i >> 1);
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5987
        if (!MB_FIELD) {
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            bS_index &= ~1;
            bS_index |= (i & 1);
        }

        if( bS[bS_index] == 0 ) {
            continue;
        }

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5996
        qp_index = MB_FIELD ? (i >> 3) : (i & 1);
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        index_a = qp[qp_index] + h->slice_alpha_c0_offset;
        alpha = (alpha_table+52)[index_a];
        beta  = (beta_table+52)[qp[qp_index] + h->slice_beta_offset];
6000 6001

        if( bS[bS_index] < 4 ) {
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6002
            const int tc0 = (tc0_table+52)[index_a][bS[bS_index]];
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            const int p0 = pix[-1];
            const int p1 = pix[-2];
            const int p2 = pix[-3];
            const int q0 = pix[0];
            const int q1 = pix[1];
            const int q2 = pix[2];

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diego committed
6010 6011 6012
            if( FFABS( p0 - q0 ) < alpha &&
                FFABS( p1 - p0 ) < beta &&
                FFABS( q1 - q0 ) < beta ) {
6013 6014 6015
                int tc = tc0;
                int i_delta;

diego's avatar
diego committed
6016
                if( FFABS( p2 - p0 ) < beta ) {
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6017
                    pix[-2] = p1 + av_clip( ( p2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( p1 << 1 ) ) >> 1, -tc0, tc0 );
6018 6019
                    tc++;
                }
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6020
                if( FFABS( q2 - q0 ) < beta ) {
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6021
                    pix[1] = q1 + av_clip( ( q2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( q1 << 1 ) ) >> 1, -tc0, tc0 );
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                    tc++;
                }

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6025 6026 6027
                i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
                pix[-1] = av_clip_uint8( p0 + i_delta );    /* p0' */
                pix[0]  = av_clip_uint8( q0 - i_delta );    /* q0' */
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mbardiaux committed
6028
                tprintf(h->s.avctx, "filter_mb_mbaff_edgev i:%d, qp:%d, indexA:%d, alpha:%d, beta:%d, tc:%d\n# bS:%d -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x]\n", i, qp[qp_index], index_a, alpha, beta, tc, bS[bS_index], pix[-3], p1, p0, q0, q1, pix[2], p1, pix[-1], pix[0], q1);
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            }
        }else{
            const int p0 = pix[-1];
            const int p1 = pix[-2];
            const int p2 = pix[-3];

            const int q0 = pix[0];
            const int q1 = pix[1];
            const int q2 = pix[2];

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diego committed
6039 6040 6041
            if( FFABS( p0 - q0 ) < alpha &&
                FFABS( p1 - p0 ) < beta &&
                FFABS( q1 - q0 ) < beta ) {
6042

diego's avatar
diego committed
6043 6044
                if(FFABS( p0 - q0 ) < (( alpha >> 2 ) + 2 )){
                    if( FFABS( p2 - p0 ) < beta)
6045 6046 6047 6048 6049 6050 6051 6052 6053 6054
                    {
                        const int p3 = pix[-4];
                        /* p0', p1', p2' */
                        pix[-1] = ( p2 + 2*p1 + 2*p0 + 2*q0 + q1 + 4 ) >> 3;
                        pix[-2] = ( p2 + p1 + p0 + q0 + 2 ) >> 2;
                        pix[-3] = ( 2*p3 + 3*p2 + p1 + p0 + q0 + 4 ) >> 3;
                    } else {
                        /* p0' */
                        pix[-1] = ( 2*p1 + p0 + q1 + 2 ) >> 2;
                    }
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diego committed
6055
                    if( FFABS( q2 - q0 ) < beta)
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                    {
                        const int q3 = pix[3];
                        /* q0', q1', q2' */
                        pix[0] = ( p1 + 2*p0 + 2*q0 + 2*q1 + q2 + 4 ) >> 3;
                        pix[1] = ( p0 + q0 + q1 + q2 + 2 ) >> 2;
                        pix[2] = ( 2*q3 + 3*q2 + q1 + q0 + p0 + 4 ) >> 3;
                    } else {
                        /* q0' */
                        pix[0] = ( 2*q1 + q0 + p1 + 2 ) >> 2;
                    }
                }else{
                    /* p0', q0' */
                    pix[-1] = ( 2*p1 + p0 + q1 + 2 ) >> 2;
                    pix[ 0] = ( 2*q1 + q0 + p1 + 2 ) >> 2;
                }
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mbardiaux committed
6071
                tprintf(h->s.avctx, "filter_mb_mbaff_edgev i:%d, qp:%d, indexA:%d, alpha:%d, beta:%d\n# bS:4 -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x, %02x, %02x]\n", i, qp[qp_index], index_a, alpha, beta, p2, p1, p0, q0, q1, q2, pix[-3], pix[-2], pix[-1], pix[0], pix[1], pix[2]);
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            }
        }
    }
}
6076
static void filter_mb_mbaff_edgecv( H264Context *h, uint8_t *pix, int stride, int16_t bS[8], int qp[2] ) {
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    int i;
    for( i = 0; i < 8; i++, pix += stride) {
        int index_a;
        int alpha;
        int beta;

        int qp_index;
        int bS_index = i;

        if( bS[bS_index] == 0 ) {
            continue;
        }

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lorenm committed
6090
        qp_index = MB_FIELD ? (i >> 2) : (i & 1);
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        index_a = qp[qp_index] + h->slice_alpha_c0_offset;
        alpha = (alpha_table+52)[index_a];
        beta  = (beta_table+52)[qp[qp_index] + h->slice_beta_offset];
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6094

6095
        if( bS[bS_index] < 4 ) {
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6096
            const int tc = (tc0_table+52)[index_a][bS[bS_index]] + 1;
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            const int p0 = pix[-1];
            const int p1 = pix[-2];
            const int q0 = pix[0];
            const int q1 = pix[1];

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6102 6103 6104
            if( FFABS( p0 - q0 ) < alpha &&
                FFABS( p1 - p0 ) < beta &&
                FFABS( q1 - q0 ) < beta ) {
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reimar committed
6105
                const int i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
6106

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reimar committed
6107 6108
                pix[-1] = av_clip_uint8( p0 + i_delta );    /* p0' */
                pix[0]  = av_clip_uint8( q0 - i_delta );    /* q0' */
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mbardiaux committed
6109
                tprintf(h->s.avctx, "filter_mb_mbaff_edgecv i:%d, qp:%d, indexA:%d, alpha:%d, beta:%d, tc:%d\n# bS:%d -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x]\n", i, qp[qp_index], index_a, alpha, beta, tc, bS[bS_index], pix[-3], p1, p0, q0, q1, pix[2], p1, pix[-1], pix[0], q1);
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            }
        }else{
            const int p0 = pix[-1];
            const int p1 = pix[-2];
            const int q0 = pix[0];
            const int q1 = pix[1];

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diego committed
6117 6118 6119
            if( FFABS( p0 - q0 ) < alpha &&
                FFABS( p1 - p0 ) < beta &&
                FFABS( q1 - q0 ) < beta ) {
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                pix[-1] = ( 2*p1 + p0 + q1 + 2 ) >> 2;   /* p0' */
                pix[0]  = ( 2*q1 + q0 + p1 + 2 ) >> 2;   /* q0' */
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mbardiaux committed
6123
                tprintf(h->s.avctx, "filter_mb_mbaff_edgecv i:%d\n# bS:4 -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x, %02x, %02x]\n", i, pix[-3], p1, p0, q0, q1, pix[2], pix[-3], pix[-2], pix[-1], pix[0], pix[1], pix[2]);
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            }
        }
    }
}

6129
static void filter_mb_edgeh( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
6130 6131 6132
    const int index_a = qp + h->slice_alpha_c0_offset;
    const int alpha = (alpha_table+52)[index_a];
    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
6133

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lorenm committed
6134
    if( bS[0] < 4 ) {
6135
        int8_t tc[4];
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6136 6137 6138 6139
        tc[0] = (tc0_table+52)[index_a][bS[0]];
        tc[1] = (tc0_table+52)[index_a][bS[1]];
        tc[2] = (tc0_table+52)[index_a][bS[2]];
        tc[3] = (tc0_table+52)[index_a][bS[3]];
lorenm's avatar
lorenm committed
6140 6141
        h->s.dsp.h264_v_loop_filter_luma(pix, stride, alpha, beta, tc);
    } else {
6142
        h->s.dsp.h264_v_loop_filter_luma_intra(pix, stride, alpha, beta);
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    }
}

6146
static void filter_mb_edgech( H264Context *h, uint8_t *pix, int stride, int16_t bS[4], int qp ) {
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    const int index_a = qp + h->slice_alpha_c0_offset;
    const int alpha = (alpha_table+52)[index_a];
    const int beta  = (beta_table+52)[qp + h->slice_beta_offset];
6150

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lorenm committed
6151
    if( bS[0] < 4 ) {
6152
        int8_t tc[4];
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        tc[0] = (tc0_table+52)[index_a][bS[0]]+1;
        tc[1] = (tc0_table+52)[index_a][bS[1]]+1;
        tc[2] = (tc0_table+52)[index_a][bS[2]]+1;
        tc[3] = (tc0_table+52)[index_a][bS[3]]+1;
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lorenm committed
6157 6158
        h->s.dsp.h264_v_loop_filter_chroma(pix, stride, alpha, beta, tc);
    } else {
6159
        h->s.dsp.h264_v_loop_filter_chroma_intra(pix, stride, alpha, beta);
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    }
}

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static void filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize) {
    MpegEncContext * const s = &h->s;
6165
    int mb_y_firstrow = s->picture_structure == PICT_BOTTOM_FIELD;
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    int mb_xy, mb_type;
    int qp, qp0, qp1, qpc, qpc0, qpc1, qp_thresh;

6169
    mb_xy = h->mb_xy;
6170

6171
    if(mb_x==0 || mb_y==mb_y_firstrow || !s->dsp.h264_loop_filter_strength || h->pps.chroma_qp_diff ||
6172
        !(s->flags2 & CODEC_FLAG2_FAST) || //FIXME filter_mb_fast is broken, thus hasto be, but should not under CODEC_FLAG2_FAST
6173 6174
       (h->deblocking_filter == 2 && (h->slice_table[mb_xy] != h->slice_table[h->top_mb_xy] ||
                                      h->slice_table[mb_xy] != h->slice_table[mb_xy - 1]))) {
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        filter_mb(h, mb_x, mb_y, img_y, img_cb, img_cr, linesize, uvlinesize);
        return;
    }
    assert(!FRAME_MBAFF);

    mb_type = s->current_picture.mb_type[mb_xy];
    qp = s->current_picture.qscale_table[mb_xy];
    qp0 = s->current_picture.qscale_table[mb_xy-1];
    qp1 = s->current_picture.qscale_table[h->top_mb_xy];
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    qpc = get_chroma_qp( h, 0, qp );
    qpc0 = get_chroma_qp( h, 0, qp0 );
    qpc1 = get_chroma_qp( h, 0, qp1 );
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    qp0 = (qp + qp0 + 1) >> 1;
    qp1 = (qp + qp1 + 1) >> 1;
    qpc0 = (qpc + qpc0 + 1) >> 1;
    qpc1 = (qpc + qpc1 + 1) >> 1;
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    qp_thresh = 15 - h->slice_alpha_c0_offset;
    if(qp <= qp_thresh && qp0 <= qp_thresh && qp1 <= qp_thresh &&
       qpc <= qp_thresh && qpc0 <= qp_thresh && qpc1 <= qp_thresh)
        return;
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    if( IS_INTRA(mb_type) ) {
        int16_t bS4[4] = {4,4,4,4};
        int16_t bS3[4] = {3,3,3,3};
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6199
        int16_t *bSH = FIELD_PICTURE ? bS3 : bS4;
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        if( IS_8x8DCT(mb_type) ) {
            filter_mb_edgev( h, &img_y[4*0], linesize, bS4, qp0 );
            filter_mb_edgev( h, &img_y[4*2], linesize, bS3, qp );
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6203
            filter_mb_edgeh( h, &img_y[4*0*linesize], linesize, bSH, qp1 );
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            filter_mb_edgeh( h, &img_y[4*2*linesize], linesize, bS3, qp );
        } else {
            filter_mb_edgev( h, &img_y[4*0], linesize, bS4, qp0 );
            filter_mb_edgev( h, &img_y[4*1], linesize, bS3, qp );
            filter_mb_edgev( h, &img_y[4*2], linesize, bS3, qp );
            filter_mb_edgev( h, &img_y[4*3], linesize, bS3, qp );
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andoma committed
6210
            filter_mb_edgeh( h, &img_y[4*0*linesize], linesize, bSH, qp1 );
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            filter_mb_edgeh( h, &img_y[4*1*linesize], linesize, bS3, qp );
            filter_mb_edgeh( h, &img_y[4*2*linesize], linesize, bS3, qp );
            filter_mb_edgeh( h, &img_y[4*3*linesize], linesize, bS3, qp );
        }
        filter_mb_edgecv( h, &img_cb[2*0], uvlinesize, bS4, qpc0 );
        filter_mb_edgecv( h, &img_cb[2*2], uvlinesize, bS3, qpc );
        filter_mb_edgecv( h, &img_cr[2*0], uvlinesize, bS4, qpc0 );
        filter_mb_edgecv( h, &img_cr[2*2], uvlinesize, bS3, qpc );
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andoma committed
6219
        filter_mb_edgech( h, &img_cb[2*0*uvlinesize], uvlinesize, bSH, qpc1 );
6220
        filter_mb_edgech( h, &img_cb[2*2*uvlinesize], uvlinesize, bS3, qpc );
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andoma committed
6221
        filter_mb_edgech( h, &img_cr[2*0*uvlinesize], uvlinesize, bSH, qpc1 );
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        filter_mb_edgech( h, &img_cr[2*2*uvlinesize], uvlinesize, bS3, qpc );
        return;
    } else {
        DECLARE_ALIGNED_8(int16_t, bS[2][4][4]);
        uint64_t (*bSv)[4] = (uint64_t(*)[4])bS;
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        int edges;
        if( IS_8x8DCT(mb_type) && (h->cbp&7) == 7 ) {
            edges = 4;
            bSv[0][0] = bSv[0][2] = bSv[1][0] = bSv[1][2] = 0x0002000200020002ULL;
        } else {
            int mask_edge1 = (mb_type & (MB_TYPE_16x16 | MB_TYPE_8x16)) ? 3 :
                             (mb_type & MB_TYPE_16x8) ? 1 : 0;
            int mask_edge0 = (mb_type & (MB_TYPE_16x16 | MB_TYPE_8x16))
                             && (s->current_picture.mb_type[mb_xy-1] & (MB_TYPE_16x16 | MB_TYPE_8x16))
                             ? 3 : 0;
            int step = IS_8x8DCT(mb_type) ? 2 : 1;
            edges = (mb_type & MB_TYPE_16x16) && !(h->cbp & 15) ? 1 : 4;
            s->dsp.h264_loop_filter_strength( bS, h->non_zero_count_cache, h->ref_cache, h->mv_cache,
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                                              (h->slice_type_nos == FF_B_TYPE), edges, step, mask_edge0, mask_edge1, FIELD_PICTURE);
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        }
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        if( IS_INTRA(s->current_picture.mb_type[mb_xy-1]) )
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            bSv[0][0] = 0x0004000400040004ULL;
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        if( IS_INTRA(s->current_picture.mb_type[h->top_mb_xy]) )
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            bSv[1][0] = FIELD_PICTURE ? 0x0003000300030003ULL : 0x0004000400040004ULL;
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#define FILTER(hv,dir,edge)\
        if(bSv[dir][edge]) {\
            filter_mb_edge##hv( h, &img_y[4*edge*(dir?linesize:1)], linesize, bS[dir][edge], edge ? qp : qp##dir );\
            if(!(edge&1)) {\
                filter_mb_edgec##hv( h, &img_cb[2*edge*(dir?uvlinesize:1)], uvlinesize, bS[dir][edge], edge ? qpc : qpc##dir );\
                filter_mb_edgec##hv( h, &img_cr[2*edge*(dir?uvlinesize:1)], uvlinesize, bS[dir][edge], edge ? qpc : qpc##dir );\
            }\
        }
        if( edges == 1 ) {
            FILTER(v,0,0);
            FILTER(h,1,0);
        } else if( IS_8x8DCT(mb_type) ) {
            FILTER(v,0,0);
            FILTER(v,0,2);
            FILTER(h,1,0);
            FILTER(h,1,2);
        } else {
            FILTER(v,0,0);
            FILTER(v,0,1);
            FILTER(v,0,2);
            FILTER(v,0,3);
            FILTER(h,1,0);
            FILTER(h,1,1);
            FILTER(h,1,2);
            FILTER(h,1,3);
        }
#undef FILTER
    }
}

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static av_always_inline void filter_mb_dir(H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize, int mb_xy, int mb_type, int mvy_limit, int first_vertical_edge_done, int dir) {
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    MpegEncContext * const s = &h->s;
    int edge;
    const int mbm_xy = dir == 0 ? mb_xy -1 : h->top_mb_xy;
    const int mbm_type = s->current_picture.mb_type[mbm_xy];
    int (*ref2frm) [64] = h->ref2frm[ h->slice_num          &(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
    int (*ref2frmm)[64] = h->ref2frm[ h->slice_table[mbm_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
    int start = h->slice_table[mbm_xy] == 0xFFFF ? 1 : 0;

    const int edges = (mb_type & (MB_TYPE_16x16|MB_TYPE_SKIP))
                              == (MB_TYPE_16x16|MB_TYPE_SKIP) ? 1 : 4;
    // how often to recheck mv-based bS when iterating between edges
    const int mask_edge = (mb_type & (MB_TYPE_16x16 | (MB_TYPE_16x8 << dir))) ? 3 :
                          (mb_type & (MB_TYPE_8x16 >> dir)) ? 1 : 0;
    // how often to recheck mv-based bS when iterating along each edge
    const int mask_par0 = mb_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir));

    if (first_vertical_edge_done) {
        start = 1;
    }

    if (h->deblocking_filter==2 && h->slice_table[mbm_xy] != h->slice_table[mb_xy])
        start = 1;

    if (FRAME_MBAFF && (dir == 1) && ((mb_y&1) == 0) && start == 0
        && !IS_INTERLACED(mb_type)
        && IS_INTERLACED(mbm_type)
        ) {
        // This is a special case in the norm where the filtering must
        // be done twice (one each of the field) even if we are in a
        // frame macroblock.
        //
        static const int nnz_idx[4] = {4,5,6,3};
        unsigned int tmp_linesize   = 2 *   linesize;
        unsigned int tmp_uvlinesize = 2 * uvlinesize;
        int mbn_xy = mb_xy - 2 * s->mb_stride;
        int qp;
        int i, j;
        int16_t bS[4];

        for(j=0; j<2; j++, mbn_xy += s->mb_stride){
            if( IS_INTRA(mb_type) ||
                IS_INTRA(s->current_picture.mb_type[mbn_xy]) ) {
                bS[0] = bS[1] = bS[2] = bS[3] = 3;
            } else {
                const uint8_t *mbn_nnz = h->non_zero_count[mbn_xy];
                for( i = 0; i < 4; i++ ) {
                    if( h->non_zero_count_cache[scan8[0]+i] != 0 ||
                        mbn_nnz[nnz_idx[i]] != 0 )
                        bS[i] = 2;
                    else
                        bS[i] = 1;
                }
            }
            // Do not use s->qscale as luma quantizer because it has not the same
            // value in IPCM macroblocks.
            qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbn_xy] + 1 ) >> 1;
            tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, tmp_linesize, tmp_uvlinesize);
            { int i; for (i = 0; i < 4; i++) tprintf(s->avctx, " bS[%d]:%d", i, bS[i]); tprintf(s->avctx, "\n"); }
            filter_mb_edgeh( h, &img_y[j*linesize], tmp_linesize, bS, qp );
            filter_mb_edgech( h, &img_cb[j*uvlinesize], tmp_uvlinesize, bS,
                              ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
            filter_mb_edgech( h, &img_cr[j*uvlinesize], tmp_uvlinesize, bS,
                              ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
        }

        start = 1;
    }

    /* Calculate bS */
    for( edge = start; edge < edges; edge++ ) {
        /* mbn_xy: neighbor macroblock */
        const int mbn_xy = edge > 0 ? mb_xy : mbm_xy;
        const int mbn_type = s->current_picture.mb_type[mbn_xy];
        int (*ref2frmn)[64] = edge > 0 ? ref2frm : ref2frmm;
        int16_t bS[4];
        int qp;

        if( (edge&1) && IS_8x8DCT(mb_type) )
            continue;

        if( IS_INTRA(mb_type) ||
            IS_INTRA(mbn_type) ) {
            int value;
            if (edge == 0) {
                if (   (!IS_INTERLACED(mb_type) && !IS_INTERLACED(mbm_type))
                    || ((FRAME_MBAFF || (s->picture_structure != PICT_FRAME)) && (dir == 0))
                ) {
                    value = 4;
                } else {
                    value = 3;
                }
            } else {
                value = 3;
            }
            bS[0] = bS[1] = bS[2] = bS[3] = value;
        } else {
            int i, l;
            int mv_done;

            if( edge & mask_edge ) {
                bS[0] = bS[1] = bS[2] = bS[3] = 0;
                mv_done = 1;
            }
            else if( FRAME_MBAFF && IS_INTERLACED(mb_type ^ mbn_type)) {
                bS[0] = bS[1] = bS[2] = bS[3] = 1;
                mv_done = 1;
            }
            else if( mask_par0 && (edge || (mbn_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir)))) ) {
                int b_idx= 8 + 4 + edge * (dir ? 8:1);
                int bn_idx= b_idx - (dir ? 8:1);
                int v = 0;

                for( l = 0; !v && l < 1 + (h->slice_type_nos == FF_B_TYPE); l++ ) {
                    v |= ref2frm[l][h->ref_cache[l][b_idx]] != ref2frmn[l][h->ref_cache[l][bn_idx]] ||
                         FFABS( h->mv_cache[l][b_idx][0] - h->mv_cache[l][bn_idx][0] ) >= 4 ||
                         FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[l][bn_idx][1] ) >= mvy_limit;
                }

                if(h->slice_type_nos == FF_B_TYPE && v){
                    v=0;
                    for( l = 0; !v && l < 2; l++ ) {
                        int ln= 1-l;
                        v |= ref2frm[l][h->ref_cache[l][b_idx]] != ref2frmn[ln][h->ref_cache[ln][bn_idx]] ||
                            FFABS( h->mv_cache[l][b_idx][0] - h->mv_cache[ln][bn_idx][0] ) >= 4 ||
                            FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[ln][bn_idx][1] ) >= mvy_limit;
                    }
                }

                bS[0] = bS[1] = bS[2] = bS[3] = v;
                mv_done = 1;
            }
            else
                mv_done = 0;

            for( i = 0; i < 4; i++ ) {
                int x = dir == 0 ? edge : i;
                int y = dir == 0 ? i    : edge;
                int b_idx= 8 + 4 + x + 8*y;
                int bn_idx= b_idx - (dir ? 8:1);

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                if( h->non_zero_count_cache[b_idx] |
                    h->non_zero_count_cache[bn_idx] ) {
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                    bS[i] = 2;
                }
                else if(!mv_done)
                {
                    bS[i] = 0;
                    for( l = 0; l < 1 + (h->slice_type_nos == FF_B_TYPE); l++ ) {
                        if( ref2frm[l][h->ref_cache[l][b_idx]] != ref2frmn[l][h->ref_cache[l][bn_idx]] ||
                            FFABS( h->mv_cache[l][b_idx][0] - h->mv_cache[l][bn_idx][0] ) >= 4 ||
                            FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[l][bn_idx][1] ) >= mvy_limit ) {
                            bS[i] = 1;
                            break;
                        }
                    }

                    if(h->slice_type_nos == FF_B_TYPE && bS[i]){
                        bS[i] = 0;
                        for( l = 0; l < 2; l++ ) {
                            int ln= 1-l;
                            if( ref2frm[l][h->ref_cache[l][b_idx]] != ref2frmn[ln][h->ref_cache[ln][bn_idx]] ||
                                FFABS( h->mv_cache[l][b_idx][0] - h->mv_cache[ln][bn_idx][0] ) >= 4 ||
                                FFABS( h->mv_cache[l][b_idx][1] - h->mv_cache[ln][bn_idx][1] ) >= mvy_limit ) {
                                bS[i] = 1;
                                break;
                            }
                        }
                    }
                }
            }

            if(bS[0]+bS[1]+bS[2]+bS[3] == 0)
                continue;
        }

        /* Filter edge */
        // Do not use s->qscale as luma quantizer because it has not the same
        // value in IPCM macroblocks.
        qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbn_xy] + 1 ) >> 1;
        //tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d, QPc:%d, QPcn:%d\n", mb_x, mb_y, dir, edge, qp, h->chroma_qp, s->current_picture.qscale_table[mbn_xy]);
        tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, linesize, uvlinesize);
        { int i; for (i = 0; i < 4; i++) tprintf(s->avctx, " bS[%d]:%d", i, bS[i]); tprintf(s->avctx, "\n"); }
        if( dir == 0 ) {
            filter_mb_edgev( h, &img_y[4*edge], linesize, bS, qp );
            if( (edge&1) == 0 ) {
                filter_mb_edgecv( h, &img_cb[2*edge], uvlinesize, bS,
                                  ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
                filter_mb_edgecv( h, &img_cr[2*edge], uvlinesize, bS,
                                  ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
            }
        } else {
            filter_mb_edgeh( h, &img_y[4*edge*linesize], linesize, bS, qp );
            if( (edge&1) == 0 ) {
                filter_mb_edgech( h, &img_cb[2*edge*uvlinesize], uvlinesize, bS,
                                  ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
                filter_mb_edgech( h, &img_cr[2*edge*uvlinesize], uvlinesize, bS,
                                  ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1);
            }
        }
    }
}

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static void filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize) {
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    MpegEncContext * const s = &h->s;
    const int mb_xy= mb_x + mb_y*s->mb_stride;
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    const int mb_type = s->current_picture.mb_type[mb_xy];
    const int mvy_limit = IS_INTERLACED(mb_type) ? 2 : 4;
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    int first_vertical_edge_done = 0;
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    av_unused int dir;
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    //for sufficiently low qp, filtering wouldn't do anything
    //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
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    if(!FRAME_MBAFF){
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        int qp_thresh = 15 - h->slice_alpha_c0_offset - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1]);
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        int qp = s->current_picture.qscale_table[mb_xy];
        if(qp <= qp_thresh
           && (mb_x == 0 || ((qp + s->current_picture.qscale_table[mb_xy-1] + 1)>>1) <= qp_thresh)
           && (mb_y == 0 || ((qp + s->current_picture.qscale_table[h->top_mb_xy] + 1)>>1) <= qp_thresh)){
            return;
        }
    }

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    // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
    if(!h->pps.cabac && h->pps.transform_8x8_mode){
        int top_type, left_type[2];
        top_type     = s->current_picture.mb_type[h->top_mb_xy]    ;
        left_type[0] = s->current_picture.mb_type[h->left_mb_xy[0]];
        left_type[1] = s->current_picture.mb_type[h->left_mb_xy[1]];

        if(IS_8x8DCT(top_type)){
            h->non_zero_count_cache[4+8*0]=
            h->non_zero_count_cache[5+8*0]= h->cbp_table[h->top_mb_xy] & 4;
            h->non_zero_count_cache[6+8*0]=
            h->non_zero_count_cache[7+8*0]= h->cbp_table[h->top_mb_xy] & 8;
        }
        if(IS_8x8DCT(left_type[0])){
            h->non_zero_count_cache[3+8*1]=
            h->non_zero_count_cache[3+8*2]= h->cbp_table[h->left_mb_xy[0]]&2; //FIXME check MBAFF
        }
        if(IS_8x8DCT(left_type[1])){
            h->non_zero_count_cache[3+8*3]=
            h->non_zero_count_cache[3+8*4]= h->cbp_table[h->left_mb_xy[1]]&8; //FIXME check MBAFF
        }

        if(IS_8x8DCT(mb_type)){
            h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
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            h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
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            h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
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            h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
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            h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
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            h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
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            h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
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            h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
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        }
    }

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    if (FRAME_MBAFF
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            // left mb is in picture
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            && h->slice_table[mb_xy-1] != 0xFFFF
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            // and current and left pair do not have the same interlaced type
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            && (IS_INTERLACED(mb_type) != IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]))
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            // and left mb is in the same slice if deblocking_filter == 2
            && (h->deblocking_filter!=2 || h->slice_table[mb_xy-1] == h->slice_table[mb_xy])) {
        /* First vertical edge is different in MBAFF frames
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         * There are 8 different bS to compute and 2 different Qp
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         */
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        const int pair_xy = mb_x + (mb_y&~1)*s->mb_stride;
        const int left_mb_xy[2] = { pair_xy-1, pair_xy-1+s->mb_stride };
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        int16_t bS[8];
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        int qp[2];
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        int bqp[2];
        int rqp[2];
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        int mb_qp, mbn0_qp, mbn1_qp;
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        int i;
        first_vertical_edge_done = 1;
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        if( IS_INTRA(mb_type) )
            bS[0] = bS[1] = bS[2] = bS[3] = bS[4] = bS[5] = bS[6] = bS[7] = 4;
        else {
            for( i = 0; i < 8; i++ ) {
                int mbn_xy = MB_FIELD ? left_mb_xy[i>>2] : left_mb_xy[i&1];

                if( IS_INTRA( s->current_picture.mb_type[mbn_xy] ) )
                    bS[i] = 4;
                else if( h->non_zero_count_cache[12+8*(i>>1)] != 0 ||
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                         ((!h->pps.cabac && IS_8x8DCT(s->current_picture.mb_type[mbn_xy])) ?
                            (h->cbp_table[mbn_xy] & ((MB_FIELD ? (i&2) : (mb_y&1)) ? 8 : 2))
                                                                       :
                            h->non_zero_count[mbn_xy][MB_FIELD ? i&3 : (i>>2)+(mb_y&1)*2]))
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                    bS[i] = 2;
                else
                    bS[i] = 1;
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            }
        }

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        mb_qp = s->current_picture.qscale_table[mb_xy];
        mbn0_qp = s->current_picture.qscale_table[left_mb_xy[0]];
        mbn1_qp = s->current_picture.qscale_table[left_mb_xy[1]];
        qp[0] = ( mb_qp + mbn0_qp + 1 ) >> 1;
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        bqp[0] = ( get_chroma_qp( h, 0, mb_qp ) +
                   get_chroma_qp( h, 0, mbn0_qp ) + 1 ) >> 1;
        rqp[0] = ( get_chroma_qp( h, 1, mb_qp ) +
                   get_chroma_qp( h, 1, mbn0_qp ) + 1 ) >> 1;
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        qp[1] = ( mb_qp + mbn1_qp + 1 ) >> 1;
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        bqp[1] = ( get_chroma_qp( h, 0, mb_qp ) +
                   get_chroma_qp( h, 0, mbn1_qp ) + 1 ) >> 1;
        rqp[1] = ( get_chroma_qp( h, 1, mb_qp ) +
                   get_chroma_qp( h, 1, mbn1_qp ) + 1 ) >> 1;
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6590 6591

        /* Filter edge */
6592
        tprintf(s->avctx, "filter mb:%d/%d MBAFF, QPy:%d/%d, QPb:%d/%d QPr:%d/%d ls:%d uvls:%d", mb_x, mb_y, qp[0], qp[1], bqp[0], bqp[1], rqp[0], rqp[1], linesize, uvlinesize);
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6593
        { int i; for (i = 0; i < 8; i++) tprintf(s->avctx, " bS[%d]:%d", i, bS[i]); tprintf(s->avctx, "\n"); }
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6594
        filter_mb_mbaff_edgev ( h, &img_y [0], linesize,   bS, qp );
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        filter_mb_mbaff_edgecv( h, &img_cb[0], uvlinesize, bS, bqp );
        filter_mb_mbaff_edgecv( h, &img_cr[0], uvlinesize, bS, rqp );
6597
    }
6598

6599
#if CONFIG_SMALL
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    for( dir = 0; dir < 2; dir++ )
        filter_mb_dir(h, mb_x, mb_y, img_y, img_cb, img_cr, linesize, uvlinesize, mb_xy, mb_type, mvy_limit, dir ? 0 : first_vertical_edge_done, dir);
#else
    filter_mb_dir(h, mb_x, mb_y, img_y, img_cb, img_cr, linesize, uvlinesize, mb_xy, mb_type, mvy_limit, first_vertical_edge_done, 0);
    filter_mb_dir(h, mb_x, mb_y, img_y, img_cb, img_cr, linesize, uvlinesize, mb_xy, mb_type, mvy_limit, 0, 1);
#endif
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}

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static int decode_slice(struct AVCodecContext *avctx, void *arg){
    H264Context *h = *(void**)arg;
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    MpegEncContext * const s = &h->s;
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;

    s->mb_skip_run= -1;

6615
    h->is_complex = FRAME_MBAFF || s->picture_structure != PICT_FRAME || s->codec_id != CODEC_ID_H264 ||
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6616
                    (CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
6617

6618 6619
    if( h->pps.cabac ) {
        int i;
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        /* realign */
        align_get_bits( &s->gb );

        /* init cabac */
6625
        ff_init_cabac_states( &h->cabac);
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        ff_init_cabac_decoder( &h->cabac,
                               s->gb.buffer + get_bits_count(&s->gb)/8,
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                               ( s->gb.size_in_bits - get_bits_count(&s->gb) + 7)/8);
6629
        /* calculate pre-state */
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        for( i= 0; i < 460; i++ ) {
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            int pre;
6632
            if( h->slice_type_nos == FF_I_TYPE )
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                pre = av_clip( ((cabac_context_init_I[i][0] * s->qscale) >>4 ) + cabac_context_init_I[i][1], 1, 126 );
6634
            else
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6635
                pre = av_clip( ((cabac_context_init_PB[h->cabac_init_idc][i][0] * s->qscale) >>4 ) + cabac_context_init_PB[h->cabac_init_idc][i][1], 1, 126 );
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            if( pre <= 63 )
6638
                h->cabac_state[i] = 2 * ( 63 - pre ) + 0;
6639
            else
6640
                h->cabac_state[i] = 2 * ( pre - 64 ) + 1;
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6641
        }
6642

6643
        for(;;){
6644
//START_TIMER
6645
            int ret = decode_mb_cabac(h);
6646
            int eos;
6647
//STOP_TIMER("decode_mb_cabac")
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6648

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6649
            if(ret>=0) hl_decode_mb(h);
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            if( ret >= 0 && FRAME_MBAFF ) { //FIXME optimal? or let mb_decode decode 16x32 ?
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                s->mb_y++;

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6654
                ret = decode_mb_cabac(h);
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6656
                if(ret>=0) hl_decode_mb(h);
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                s->mb_y--;
            }
6659
            eos = get_cabac_terminate( &h->cabac );
6660

6661
            if( ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 2) {
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6662
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d, bytestream (%td)\n", s->mb_x, s->mb_y, h->cabac.bytestream_end - h->cabac.bytestream);
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                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
                return -1;
            }

            if( ++s->mb_x >= s->mb_width ) {
                s->mb_x = 0;
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
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                ++s->mb_y;
6671
                if(FIELD_OR_MBAFF_PICTURE) {
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                    ++s->mb_y;
                }
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            }

6676
            if( eos || s->mb_y >= s->mb_height ) {
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6677
                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
6678
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
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                return 0;
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            }
        }

    } else {
        for(;;){
            int ret = decode_mb_cavlc(h);

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            if(ret>=0) hl_decode_mb(h);
6688

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            if(ret>=0 && FRAME_MBAFF){ //FIXME optimal? or let mb_decode decode 16x32 ?
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                s->mb_y++;
                ret = decode_mb_cavlc(h);

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                if(ret>=0) hl_decode_mb(h);
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                s->mb_y--;
            }

            if(ret<0){
                av_log(h->s.avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
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                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);

                return -1;
            }
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            if(++s->mb_x >= s->mb_width){
                s->mb_x=0;
                ff_draw_horiz_band(s, 16*s->mb_y, 16);
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                ++s->mb_y;
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                if(FIELD_OR_MBAFF_PICTURE) {
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                    ++s->mb_y;
                }
                if(s->mb_y >= s->mb_height){
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                    tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
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                    if(get_bits_count(&s->gb) == s->gb.size_in_bits ) {
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                        return 0;
                    }else{
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                        return -1;
                    }
                }
            }

            if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->mb_skip_run<=0){
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                tprintf(s->avctx, "slice end %d %d\n", get_bits_count(&s->gb), s->gb.size_in_bits);
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                if(get_bits_count(&s->gb) == s->gb.size_in_bits ){
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                    return 0;
                }else{
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);

                    return -1;
                }
            }
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        }
    }
6740

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#if 0
    for(;s->mb_y < s->mb_height; s->mb_y++){
        for(;s->mb_x < s->mb_width; s->mb_x++){
            int ret= decode_mb(h);
6745

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            hl_decode_mb(h);

            if(ret<0){
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6749
                av_log(s->avctx, AV_LOG_ERROR, "error while decoding MB %d %d\n", s->mb_x, s->mb_y);
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                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);

                return -1;
            }
6754

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            if(++s->mb_x >= s->mb_width){
                s->mb_x=0;
                if(++s->mb_y >= s->mb_height){
                    if(get_bits_count(s->gb) == s->gb.size_in_bits){
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                        return 0;
                    }else{
                        ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                        return -1;
                    }
                }
            }
6769

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            if(get_bits_count(s->?gb) >= s->gb?.size_in_bits){
                if(get_bits_count(s->gb) == s->gb.size_in_bits){
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);

                    return 0;
                }else{
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);

                    return -1;
                }
            }
        }
        s->mb_x=0;
        ff_draw_horiz_band(s, 16*s->mb_y, 16);
    }
#endif
    return -1; //not reached
}

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static int decode_picture_timing(H264Context *h){
    MpegEncContext * const s = &h->s;
    if(h->sps.nal_hrd_parameters_present_flag || h->sps.vcl_hrd_parameters_present_flag){
6792
        h->sei_cpb_removal_delay = get_bits(&s->gb, h->sps.cpb_removal_delay_length);
6793
        h->sei_dpb_output_delay = get_bits(&s->gb, h->sps.dpb_output_delay_length);
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    }
    if(h->sps.pic_struct_present_flag){
        unsigned int i, num_clock_ts;
        h->sei_pic_struct = get_bits(&s->gb, 4);

        if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
            return -1;

        num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct];

        for (i = 0 ; i < num_clock_ts ; i++){
            if(get_bits(&s->gb, 1)){                  /* clock_timestamp_flag */
                unsigned int full_timestamp_flag;
                skip_bits(&s->gb, 2);                 /* ct_type */
                skip_bits(&s->gb, 1);                 /* nuit_field_based_flag */
                skip_bits(&s->gb, 5);                 /* counting_type */
                full_timestamp_flag = get_bits(&s->gb, 1);
                skip_bits(&s->gb, 1);                 /* discontinuity_flag */
                skip_bits(&s->gb, 1);                 /* cnt_dropped_flag */
                skip_bits(&s->gb, 8);                 /* n_frames */
                if(full_timestamp_flag){
                    skip_bits(&s->gb, 6);             /* seconds_value 0..59 */
                    skip_bits(&s->gb, 6);             /* minutes_value 0..59 */
                    skip_bits(&s->gb, 5);             /* hours_value 0..23 */
                }else{
                    if(get_bits(&s->gb, 1)){          /* seconds_flag */
                        skip_bits(&s->gb, 6);         /* seconds_value range 0..59 */
                        if(get_bits(&s->gb, 1)){      /* minutes_flag */
                            skip_bits(&s->gb, 6);     /* minutes_value 0..59 */
                            if(get_bits(&s->gb, 1))   /* hours_flag */
                                skip_bits(&s->gb, 5); /* hours_value 0..23 */
                        }
                    }
                }
                if(h->sps.time_offset_length > 0)
                    skip_bits(&s->gb, h->sps.time_offset_length); /* time_offset */
            }
        }
    }
    return 0;
}

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static int decode_unregistered_user_data(H264Context *h, int size){
    MpegEncContext * const s = &h->s;
    uint8_t user_data[16+256];
    int e, build, i;
6840

6841 6842
    if(size<16)
        return -1;
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6844 6845 6846
    for(i=0; i<sizeof(user_data)-1 && i<size; i++){
        user_data[i]= get_bits(&s->gb, 8);
    }
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6848 6849 6850 6851
    user_data[i]= 0;
    e= sscanf(user_data+16, "x264 - core %d"/*%s - H.264/MPEG-4 AVC codec - Copyleft 2005 - http://www.videolan.org/x264.html*/, &build);
    if(e==1 && build>=0)
        h->x264_build= build;
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6853 6854 6855 6856 6857
    if(s->avctx->debug & FF_DEBUG_BUGS)
        av_log(s->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data+16);

    for(; i<size; i++)
        skip_bits(&s->gb, 8);
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6859 6860 6861
    return 0;
}

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static int decode_recovery_point(H264Context *h){
    MpegEncContext * const s = &h->s;

    h->sei_recovery_frame_cnt = get_ue_golomb(&s->gb);
    skip_bits(&s->gb, 4);       /* 1b exact_match_flag, 1b broken_link_flag, 2b changing_slice_group_idc */

    return 0;
}

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static int decode_buffering_period(H264Context *h){
    MpegEncContext * const s = &h->s;
    unsigned int sps_id;
    int sched_sel_idx;
    SPS *sps;

    sps_id = get_ue_golomb_31(&s->gb);
    if(sps_id > 31 || !h->sps_buffers[sps_id]) {
        av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS %d referenced in buffering period\n", sps_id);
        return -1;
    }
    sps = h->sps_buffers[sps_id];

    // NOTE: This is really so duplicated in the standard... See H.264, D.1.1
    if (sps->nal_hrd_parameters_present_flag) {
        for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
            h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&s->gb, sps->initial_cpb_removal_delay_length);
            skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
        }
    }
    if (sps->vcl_hrd_parameters_present_flag) {
        for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
            h->initial_cpb_removal_delay[sched_sel_idx] = get_bits(&s->gb, sps->initial_cpb_removal_delay_length);
            skip_bits(&s->gb, sps->initial_cpb_removal_delay_length); // initial_cpb_removal_delay_offset
        }
    }

    h->sei_buffering_period_present = 1;
    return 0;
}

6902
int ff_h264_decode_sei(H264Context *h){
6903
    MpegEncContext * const s = &h->s;
6904

6905 6906
    while(get_bits_count(&s->gb) + 16 < s->gb.size_in_bits){
        int size, type;
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        type=0;
        do{
            type+= show_bits(&s->gb, 8);
        }while(get_bits(&s->gb, 8) == 255);
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        size=0;
        do{
            size+= show_bits(&s->gb, 8);
        }while(get_bits(&s->gb, 8) == 255);
6917

6918
        switch(type){
6919
        case SEI_TYPE_PIC_TIMING: // Picture timing SEI
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            if(decode_picture_timing(h) < 0)
                return -1;
            break;
6923
        case SEI_TYPE_USER_DATA_UNREGISTERED:
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6924
            if(decode_unregistered_user_data(h, size) < 0)
6925 6926
                return -1;
            break;
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        case SEI_TYPE_RECOVERY_POINT:
            if(decode_recovery_point(h) < 0)
                return -1;
            break;
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        case SEI_BUFFERING_PERIOD:
            if(decode_buffering_period(h) < 0)
                return -1;
            break;
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        default:
            skip_bits(&s->gb, 8*size);
        }
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        //FIXME check bits here
        align_get_bits(&s->gb);
    }

    return 0;
}

6946
static inline int decode_hrd_parameters(H264Context *h, SPS *sps){
6947 6948
    MpegEncContext * const s = &h->s;
    int cpb_count, i;
6949
    cpb_count = get_ue_golomb_31(&s->gb) + 1;
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    if(cpb_count > 32U){
        av_log(h->s.avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count);
        return -1;
    }

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    get_bits(&s->gb, 4); /* bit_rate_scale */
    get_bits(&s->gb, 4); /* cpb_size_scale */
    for(i=0; i<cpb_count; i++){
        get_ue_golomb(&s->gb); /* bit_rate_value_minus1 */
        get_ue_golomb(&s->gb); /* cpb_size_value_minus1 */
        get_bits1(&s->gb);     /* cbr_flag */
    }
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    sps->initial_cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
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    sps->cpb_removal_delay_length = get_bits(&s->gb, 5) + 1;
    sps->dpb_output_delay_length = get_bits(&s->gb, 5) + 1;
    sps->time_offset_length = get_bits(&s->gb, 5);
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    sps->cpb_cnt = cpb_count;
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    return 0;
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}

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static inline int decode_vui_parameters(H264Context *h, SPS *sps){
    MpegEncContext * const s = &h->s;
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    int aspect_ratio_info_present_flag;
    unsigned int aspect_ratio_idc;
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    aspect_ratio_info_present_flag= get_bits1(&s->gb);
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    if( aspect_ratio_info_present_flag ) {
        aspect_ratio_idc= get_bits(&s->gb, 8);
        if( aspect_ratio_idc == EXTENDED_SAR ) {
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            sps->sar.num= get_bits(&s->gb, 16);
            sps->sar.den= get_bits(&s->gb, 16);
6983
        }else if(aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)){
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6984
            sps->sar=  pixel_aspect[aspect_ratio_idc];
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        }else{
6986
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal aspect ratio\n");
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            return -1;
        }
    }else{
6990
        sps->sar.num=
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        sps->sar.den= 0;
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    }
//            s->avctx->aspect_ratio= sar_width*s->width / (float)(s->height*sar_height);
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    if(get_bits1(&s->gb)){      /* overscan_info_present_flag */
        get_bits1(&s->gb);      /* overscan_appropriate_flag */
    }

    if(get_bits1(&s->gb)){      /* video_signal_type_present_flag */
        get_bits(&s->gb, 3);    /* video_format */
        get_bits1(&s->gb);      /* video_full_range_flag */
        if(get_bits1(&s->gb)){  /* colour_description_present_flag */
            get_bits(&s->gb, 8); /* colour_primaries */
            get_bits(&s->gb, 8); /* transfer_characteristics */
            get_bits(&s->gb, 8); /* matrix_coefficients */
        }
    }

    if(get_bits1(&s->gb)){      /* chroma_location_info_present_flag */
        get_ue_golomb(&s->gb);  /* chroma_sample_location_type_top_field */
        get_ue_golomb(&s->gb);  /* chroma_sample_location_type_bottom_field */
    }

    sps->timing_info_present_flag = get_bits1(&s->gb);
    if(sps->timing_info_present_flag){
        sps->num_units_in_tick = get_bits_long(&s->gb, 32);
        sps->time_scale = get_bits_long(&s->gb, 32);
        sps->fixed_frame_rate_flag = get_bits1(&s->gb);
    }

7021 7022
    sps->nal_hrd_parameters_present_flag = get_bits1(&s->gb);
    if(sps->nal_hrd_parameters_present_flag)
7023 7024
        if(decode_hrd_parameters(h, sps) < 0)
            return -1;
7025 7026
    sps->vcl_hrd_parameters_present_flag = get_bits1(&s->gb);
    if(sps->vcl_hrd_parameters_present_flag)
7027 7028
        if(decode_hrd_parameters(h, sps) < 0)
            return -1;
7029
    if(sps->nal_hrd_parameters_present_flag || sps->vcl_hrd_parameters_present_flag)
7030
        get_bits1(&s->gb);     /* low_delay_hrd_flag */
7031
    sps->pic_struct_present_flag = get_bits1(&s->gb);
7032 7033 7034 7035 7036 7037 7038 7039

    sps->bitstream_restriction_flag = get_bits1(&s->gb);
    if(sps->bitstream_restriction_flag){
        get_bits1(&s->gb);     /* motion_vectors_over_pic_boundaries_flag */
        get_ue_golomb(&s->gb); /* max_bytes_per_pic_denom */
        get_ue_golomb(&s->gb); /* max_bits_per_mb_denom */
        get_ue_golomb(&s->gb); /* log2_max_mv_length_horizontal */
        get_ue_golomb(&s->gb); /* log2_max_mv_length_vertical */
7040
        sps->num_reorder_frames= get_ue_golomb(&s->gb);
7041 7042
        get_ue_golomb(&s->gb); /*max_dec_frame_buffering*/

7043 7044
        if(sps->num_reorder_frames > 16U /*max_dec_frame_buffering || max_dec_frame_buffering > 16*/){
            av_log(h->s.avctx, AV_LOG_ERROR, "illegal num_reorder_frames %d\n", sps->num_reorder_frames);
7045 7046
            return -1;
        }
7047 7048
    }

michaelni's avatar
michaelni committed
7049 7050 7051
    return 0;
}

7052 7053
static void decode_scaling_list(H264Context *h, uint8_t *factors, int size,
                                const uint8_t *jvt_list, const uint8_t *fallback_list){
lorenm's avatar
lorenm committed
7054 7055
    MpegEncContext * const s = &h->s;
    int i, last = 8, next = 8;
7056
    const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct;
7057 7058
    if(!get_bits1(&s->gb)) /* matrix not written, we use the predicted one */
        memcpy(factors, fallback_list, size*sizeof(uint8_t));
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7059 7060 7061 7062
    else
    for(i=0;i<size;i++){
        if(next)
            next = (last + get_se_golomb(&s->gb)) & 0xff;
7063 7064
        if(!i && !next){ /* matrix not written, we use the preset one */
            memcpy(factors, jvt_list, size*sizeof(uint8_t));
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7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082
            break;
        }
        last = factors[scan[i]] = next ? next : last;
    }
}

static void decode_scaling_matrices(H264Context *h, SPS *sps, PPS *pps, int is_sps,
                                   uint8_t (*scaling_matrix4)[16], uint8_t (*scaling_matrix8)[64]){
    MpegEncContext * const s = &h->s;
    int fallback_sps = !is_sps && sps->scaling_matrix_present;
    const uint8_t *fallback[4] = {
        fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0],
        fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1],
        fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0],
        fallback_sps ? sps->scaling_matrix8[1] : default_scaling8[1]
    };
    if(get_bits1(&s->gb)){
        sps->scaling_matrix_present |= is_sps;
7083 7084 7085 7086 7087 7088
        decode_scaling_list(h,scaling_matrix4[0],16,default_scaling4[0],fallback[0]); // Intra, Y
        decode_scaling_list(h,scaling_matrix4[1],16,default_scaling4[0],scaling_matrix4[0]); // Intra, Cr
        decode_scaling_list(h,scaling_matrix4[2],16,default_scaling4[0],scaling_matrix4[1]); // Intra, Cb
        decode_scaling_list(h,scaling_matrix4[3],16,default_scaling4[1],fallback[1]); // Inter, Y
        decode_scaling_list(h,scaling_matrix4[4],16,default_scaling4[1],scaling_matrix4[3]); // Inter, Cr
        decode_scaling_list(h,scaling_matrix4[5],16,default_scaling4[1],scaling_matrix4[4]); // Inter, Cb
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lorenm committed
7089
        if(is_sps || pps->transform_8x8_mode){
7090 7091
            decode_scaling_list(h,scaling_matrix8[0],64,default_scaling8[0],fallback[2]);  // Intra, Y
            decode_scaling_list(h,scaling_matrix8[1],64,default_scaling8[1],fallback[3]);  // Inter, Y
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lorenm committed
7092 7093 7094 7095
        }
    }
}

7096
int ff_h264_decode_seq_parameter_set(H264Context *h){
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michaelni committed
7097
    MpegEncContext * const s = &h->s;
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michaelni committed
7098
    int profile_idc, level_idc;
7099
    unsigned int sps_id;
7100
    int i;
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michaelni committed
7101
    SPS *sps;
7102

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michaelni committed
7103
    profile_idc= get_bits(&s->gb, 8);
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7104 7105 7106
    get_bits1(&s->gb);   //constraint_set0_flag
    get_bits1(&s->gb);   //constraint_set1_flag
    get_bits1(&s->gb);   //constraint_set2_flag
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michael committed
7107 7108
    get_bits1(&s->gb);   //constraint_set3_flag
    get_bits(&s->gb, 4); // reserved
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michaelni committed
7109
    level_idc= get_bits(&s->gb, 8);
7110
    sps_id= get_ue_golomb_31(&s->gb);
7111

7112 7113 7114 7115 7116
    if(sps_id >= MAX_SPS_COUNT) {
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id);
        return -1;
    }
    sps= av_mallocz(sizeof(SPS));
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benoit committed
7117
    if(sps == NULL)
7118 7119
        return -1;

michaelni's avatar
michaelni committed
7120 7121
    sps->profile_idc= profile_idc;
    sps->level_idc= level_idc;
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michael committed
7122

7123 7124 7125 7126
    memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4));
    memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8));
    sps->scaling_matrix_present = 0;

lorenm's avatar
lorenm committed
7127
    if(sps->profile_idc >= 100){ //high profile
7128
        sps->chroma_format_idc= get_ue_golomb_31(&s->gb);
7129
        if(sps->chroma_format_idc == 3)
7130 7131 7132
            sps->residual_color_transform_flag = get_bits1(&s->gb);
        sps->bit_depth_luma   = get_ue_golomb(&s->gb) + 8;
        sps->bit_depth_chroma = get_ue_golomb(&s->gb) + 8;
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lorenm committed
7133
        sps->transform_bypass = get_bits1(&s->gb);
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lorenm committed
7134
        decode_scaling_matrices(h, sps, NULL, 1, sps->scaling_matrix4, sps->scaling_matrix8);
7135 7136 7137
    }else{
        sps->chroma_format_idc= 1;
    }
lorenm's avatar
lorenm committed
7138

michaelni's avatar
michaelni committed
7139
    sps->log2_max_frame_num= get_ue_golomb(&s->gb) + 4;
7140
    sps->poc_type= get_ue_golomb_31(&s->gb);
7141

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7142 7143 7144 7145 7146 7147
    if(sps->poc_type == 0){ //FIXME #define
        sps->log2_max_poc_lsb= get_ue_golomb(&s->gb) + 4;
    } else if(sps->poc_type == 1){//FIXME #define
        sps->delta_pic_order_always_zero_flag= get_bits1(&s->gb);
        sps->offset_for_non_ref_pic= get_se_golomb(&s->gb);
        sps->offset_for_top_to_bottom_field= get_se_golomb(&s->gb);
7148
        sps->poc_cycle_length                = get_ue_golomb(&s->gb);
7149

7150 7151
        if((unsigned)sps->poc_cycle_length >= FF_ARRAY_ELEMS(sps->offset_for_ref_frame)){
            av_log(h->s.avctx, AV_LOG_ERROR, "poc_cycle_length overflow %u\n", sps->poc_cycle_length);
7152
            goto fail;
7153
        }
7154

michaelni's avatar
michaelni committed
7155 7156
        for(i=0; i<sps->poc_cycle_length; i++)
            sps->offset_for_ref_frame[i]= get_se_golomb(&s->gb);
7157
    }else if(sps->poc_type != 2){
7158
        av_log(h->s.avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type);
7159
        goto fail;
michaelni's avatar
michaelni committed
7160 7161
    }

7162
    sps->ref_frame_count= get_ue_golomb_31(&s->gb);
7163
    if(sps->ref_frame_count > MAX_PICTURE_COUNT-2 || sps->ref_frame_count >= 32U){
7164
        av_log(h->s.avctx, AV_LOG_ERROR, "too many reference frames\n");
7165
        goto fail;
7166
    }
michaelni's avatar
michaelni committed
7167
    sps->gaps_in_frame_num_allowed_flag= get_bits1(&s->gb);
7168 7169 7170 7171
    sps->mb_width = get_ue_golomb(&s->gb) + 1;
    sps->mb_height= get_ue_golomb(&s->gb) + 1;
    if((unsigned)sps->mb_width >= INT_MAX/16 || (unsigned)sps->mb_height >= INT_MAX/16 ||
       avcodec_check_dimensions(NULL, 16*sps->mb_width, 16*sps->mb_height)){
7172
        av_log(h->s.avctx, AV_LOG_ERROR, "mb_width/height overflow\n");
7173
        goto fail;
7174
    }
7175

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7176 7177 7178 7179 7180 7181 7182 7183
    sps->frame_mbs_only_flag= get_bits1(&s->gb);
    if(!sps->frame_mbs_only_flag)
        sps->mb_aff= get_bits1(&s->gb);
    else
        sps->mb_aff= 0;

    sps->direct_8x8_inference_flag= get_bits1(&s->gb);

lorenm's avatar
lorenm committed
7184 7185
#ifndef ALLOW_INTERLACE
    if(sps->mb_aff)
diego's avatar
diego committed
7186
        av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF support not included; enable it at compile-time.\n");
lorenm's avatar
lorenm committed
7187
#endif
michaelni's avatar
michaelni committed
7188 7189 7190 7191 7192 7193 7194
    sps->crop= get_bits1(&s->gb);
    if(sps->crop){
        sps->crop_left  = get_ue_golomb(&s->gb);
        sps->crop_right = get_ue_golomb(&s->gb);
        sps->crop_top   = get_ue_golomb(&s->gb);
        sps->crop_bottom= get_ue_golomb(&s->gb);
        if(sps->crop_left || sps->crop_top){
7195
            av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
michaelni's avatar
michaelni committed
7196
        }
7197
        if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !sps->frame_mbs_only_flag)){
7198 7199
            av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
        }
michaelni's avatar
michaelni committed
7200
    }else{
7201 7202 7203
        sps->crop_left  =
        sps->crop_right =
        sps->crop_top   =
michaelni's avatar
michaelni committed
7204 7205 7206
        sps->crop_bottom= 0;
    }

michaelni's avatar
michaelni committed
7207 7208 7209
    sps->vui_parameters_present_flag= get_bits1(&s->gb);
    if( sps->vui_parameters_present_flag )
        decode_vui_parameters(h, sps);
7210

michaelni's avatar
michaelni committed
7211
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
7212
        av_log(h->s.avctx, AV_LOG_DEBUG, "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s\n",
michaelni's avatar
michaelni committed
7213 7214 7215 7216 7217 7218
               sps_id, sps->profile_idc, sps->level_idc,
               sps->poc_type,
               sps->ref_frame_count,
               sps->mb_width, sps->mb_height,
               sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"),
               sps->direct_8x8_inference_flag ? "8B8" : "",
7219 7220
               sps->crop_left, sps->crop_right,
               sps->crop_top, sps->crop_bottom,
7221 7222
               sps->vui_parameters_present_flag ? "VUI" : "",
               ((const char*[]){"Gray","420","422","444"})[sps->chroma_format_idc]
michaelni's avatar
michaelni committed
7223 7224
               );
    }
7225

7226 7227
    av_free(h->sps_buffers[sps_id]);
    h->sps_buffers[sps_id]= sps;
7228
    h->sps = *sps;
michaelni's avatar
michaelni committed
7229
    return 0;
7230 7231 7232
fail:
    av_free(sps);
    return -1;
michaelni's avatar
michaelni committed
7233 7234
}

7235
static void
7236
build_qp_table(PPS *pps, int t, int index)
7237 7238
{
    int i;
7239 7240
    for(i = 0; i < 52; i++)
        pps->chroma_qp_table[t][i] = chroma_qp[av_clip(i + index, 0, 51)];
7241 7242
}

7243
int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length){
michaelni's avatar
michaelni committed
7244
    MpegEncContext * const s = &h->s;
7245
    unsigned int pps_id= get_ue_golomb(&s->gb);
7246 7247
    PPS *pps;

7248 7249
    if(pps_id >= MAX_PPS_COUNT) {
        av_log(h->s.avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id);
7250
        return -1;
7251
    }
7252

7253 7254 7255
    pps= av_mallocz(sizeof(PPS));
    if(pps == NULL)
        return -1;
7256
    pps->sps_id= get_ue_golomb_31(&s->gb);
7257 7258 7259 7260
    if((unsigned)pps->sps_id>=MAX_SPS_COUNT || h->sps_buffers[pps->sps_id] == NULL){
        av_log(h->s.avctx, AV_LOG_ERROR, "sps_id out of range\n");
        goto fail;
    }
7261

michaelni's avatar
michaelni committed
7262 7263 7264 7265 7266
    pps->cabac= get_bits1(&s->gb);
    pps->pic_order_present= get_bits1(&s->gb);
    pps->slice_group_count= get_ue_golomb(&s->gb) + 1;
    if(pps->slice_group_count > 1 ){
        pps->mb_slice_group_map_type= get_ue_golomb(&s->gb);
7267
        av_log(h->s.avctx, AV_LOG_ERROR, "FMO not supported\n");
michaelni's avatar
michaelni committed
7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294 7295 7296 7297 7298
        switch(pps->mb_slice_group_map_type){
        case 0:
#if 0
|   for( i = 0; i <= num_slice_groups_minus1; i++ ) |   |        |
|    run_length[ i ]                                |1  |ue(v)   |
#endif
            break;
        case 2:
#if 0
|   for( i = 0; i < num_slice_groups_minus1; i++ )  |   |        |
|{                                                  |   |        |
|    top_left_mb[ i ]                               |1  |ue(v)   |
|    bottom_right_mb[ i ]                           |1  |ue(v)   |
|   }                                               |   |        |
#endif
            break;
        case 3:
        case 4:
        case 5:
#if 0
|   slice_group_change_direction_flag               |1  |u(1)    |
|   slice_group_change_rate_minus1                  |1  |ue(v)   |
#endif
            break;
        case 6:
#if 0
|   slice_group_id_cnt_minus1                       |1  |ue(v)   |
|   for( i = 0; i <= slice_group_id_cnt_minus1; i++ |   |        |
|)                                                  |   |        |
|    slice_group_id[ i ]                            |1  |u(v)    |
#endif
7299
            break;
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michaelni committed
7300 7301 7302 7303
        }
    }
    pps->ref_count[0]= get_ue_golomb(&s->gb) + 1;
    pps->ref_count[1]= get_ue_golomb(&s->gb) + 1;
michael's avatar
michael committed
7304
    if(pps->ref_count[0]-1 > 32-1 || pps->ref_count[1]-1 > 32-1){
7305
        av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow (pps)\n");
7306
        goto fail;
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michaelni committed
7307
    }
7308

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michaelni committed
7309 7310 7311 7312
    pps->weighted_pred= get_bits1(&s->gb);
    pps->weighted_bipred_idc= get_bits(&s->gb, 2);
    pps->init_qp= get_se_golomb(&s->gb) + 26;
    pps->init_qs= get_se_golomb(&s->gb) + 26;
7313
    pps->chroma_qp_index_offset[0]= get_se_golomb(&s->gb);
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michaelni committed
7314 7315 7316
    pps->deblocking_filter_parameters_present= get_bits1(&s->gb);
    pps->constrained_intra_pred= get_bits1(&s->gb);
    pps->redundant_pic_cnt_present = get_bits1(&s->gb);
7317

7318 7319
    pps->transform_8x8_mode= 0;
    h->dequant_coeff_pps= -1; //contents of sps/pps can change even if id doesn't, so reinit
7320 7321
    memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, sizeof(pps->scaling_matrix4));
    memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, sizeof(pps->scaling_matrix8));
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lorenm committed
7322 7323 7324

    if(get_bits_count(&s->gb) < bit_length){
        pps->transform_8x8_mode= get_bits1(&s->gb);
benoit's avatar
 
benoit committed
7325
        decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, pps->scaling_matrix4, pps->scaling_matrix8);
7326 7327 7328
        pps->chroma_qp_index_offset[1]= get_se_golomb(&s->gb); //second_chroma_qp_index_offset
    } else {
        pps->chroma_qp_index_offset[1]= pps->chroma_qp_index_offset[0];
lorenm's avatar
lorenm committed
7329
    }
7330

7331
    build_qp_table(pps, 0, pps->chroma_qp_index_offset[0]);
7332 7333
    build_qp_table(pps, 1, pps->chroma_qp_index_offset[1]);
    if(pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1])
7334 7335
        h->pps.chroma_qp_diff= 1;

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michaelni committed
7336
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
7337
        av_log(h->s.avctx, AV_LOG_DEBUG, "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n",
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michaelni committed
7338 7339 7340 7341 7342
               pps_id, pps->sps_id,
               pps->cabac ? "CABAC" : "CAVLC",
               pps->slice_group_count,
               pps->ref_count[0], pps->ref_count[1],
               pps->weighted_pred ? "weighted" : "",
7343
               pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1],
michaelni's avatar
michaelni committed
7344 7345
               pps->deblocking_filter_parameters_present ? "LPAR" : "",
               pps->constrained_intra_pred ? "CONSTR" : "",
lorenm's avatar
lorenm committed
7346 7347
               pps->redundant_pic_cnt_present ? "REDU" : "",
               pps->transform_8x8_mode ? "8x8DCT" : ""
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michaelni committed
7348 7349
               );
    }
7350

7351 7352
    av_free(h->pps_buffers[pps_id]);
    h->pps_buffers[pps_id]= pps;
michaelni's avatar
michaelni committed
7353
    return 0;
7354 7355 7356
fail:
    av_free(pps);
    return -1;
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michaelni committed
7357 7358
}

7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370
/**
 * Call decode_slice() for each context.
 *
 * @param h h264 master context
 * @param context_count number of contexts to execute
 */
static void execute_decode_slices(H264Context *h, int context_count){
    MpegEncContext * const s = &h->s;
    AVCodecContext * const avctx= s->avctx;
    H264Context *hx;
    int i;

7371 7372
    if (s->avctx->hwaccel)
        return;
cehoyos's avatar
cehoyos committed
7373
    if(s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
7374
        return;
7375
    if(context_count == 1) {
cehoyos's avatar
cehoyos committed
7376
        decode_slice(avctx, &h);
7377 7378 7379
    } else {
        for(i = 1; i < context_count; i++) {
            hx = h->thread_context[i];
7380
            hx->s.error_recognition = avctx->error_recognition;
7381 7382 7383 7384
            hx->s.error_count = 0;
        }

        avctx->execute(avctx, (void *)decode_slice,
7385
                       (void **)h->thread_context, NULL, context_count, sizeof(void*));
7386 7387 7388 7389 7390

        /* pull back stuff from slices to master context */
        hx = h->thread_context[context_count - 1];
        s->mb_x = hx->s.mb_x;
        s->mb_y = hx->s.mb_y;
7391 7392
        s->dropable = hx->s.dropable;
        s->picture_structure = hx->s.picture_structure;
7393 7394 7395 7396 7397 7398
        for(i = 1; i < context_count; i++)
            h->s.error_count += h->thread_context[i]->s.error_count;
    }
}


michael's avatar
michael committed
7399
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
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michaelni committed
7400 7401 7402
    MpegEncContext * const s = &h->s;
    AVCodecContext * const avctx= s->avctx;
    int buf_index=0;
7403 7404 7405 7406
    H264Context *hx; ///< thread context
    int context_count = 0;

    h->max_contexts = avctx->thread_count;
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7407
#if 0
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7408
    int i;
7409 7410
    for(i=0; i<50; i++){
        av_log(NULL, AV_LOG_ERROR,"%02X ", buf[i]);
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7411 7412
    }
#endif
7413
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS)){
7414
        h->current_slice = 0;
7415
        if (!s->first_field)
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7416
            s->current_picture_ptr= NULL;
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7417
        reset_sei(h);
7418 7419
    }

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7420 7421 7422 7423
    for(;;){
        int consumed;
        int dst_length;
        int bit_length;
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7424
        const uint8_t *ptr;
7425
        int i, nalsize = 0;
7426
        int err;
7427

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7428 7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447
        if(h->is_avc) {
            if(buf_index >= buf_size) break;
            nalsize = 0;
            for(i = 0; i < h->nal_length_size; i++)
                nalsize = (nalsize << 8) | buf[buf_index++];
            if(nalsize <= 1 || (nalsize+buf_index > buf_size)){
                if(nalsize == 1){
                    buf_index++;
                    continue;
                }else{
                    av_log(h->s.avctx, AV_LOG_ERROR, "AVC: nal size %d\n", nalsize);
                    break;
                }
            }
        } else {
            // start code prefix search
            for(; buf_index + 3 < buf_size; buf_index++){
                // This should always succeed in the first iteration.
                if(buf[buf_index] == 0 && buf[buf_index+1] == 0 && buf[buf_index+2] == 1)
                    break;
7448
            }
7449

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7450
            if(buf_index+3 >= buf_size) break;
7451

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7452 7453
            buf_index+=3;
        }
7454

7455 7456
        hx = h->thread_context[context_count];

7457
        ptr= ff_h264_decode_nal(hx, buf + buf_index, &dst_length, &consumed, h->is_avc ? nalsize : buf_size - buf_index);
7458
        if (ptr==NULL || dst_length < 0){
7459 7460
            return -1;
        }
7461
        while(ptr[dst_length - 1] == 0 && dst_length > 0)
7462
            dst_length--;
7463
        bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
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7464 7465

        if(s->avctx->debug&FF_DEBUG_STARTCODE){
7466
            av_log(h->s.avctx, AV_LOG_DEBUG, "NAL %d at %d/%d length %d\n", hx->nal_unit_type, buf_index, buf_size, dst_length);
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7467
        }
7468

7469
        if (h->is_avc && (nalsize != consumed)){
7470 7471 7472 7473 7474
            int i, debug_level = AV_LOG_DEBUG;
            for (i = consumed; i < nalsize; i++)
                if (buf[buf_index+i])
                    debug_level = AV_LOG_ERROR;
            av_log(h->s.avctx, debug_level, "AVC: Consumed only %d bytes instead of %d\n", consumed, nalsize);
7475 7476
            consumed= nalsize;
        }
7477

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7478 7479
        buf_index += consumed;

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7480
        if(  (s->hurry_up == 1 && h->nal_ref_idc  == 0) //FIXME do not discard SEI id
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7481
           ||(avctx->skip_frame >= AVDISCARD_NONREF && h->nal_ref_idc  == 0))
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7482
            continue;
7483

7484 7485 7486
      again:
        err = 0;
        switch(hx->nal_unit_type){
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7487
        case NAL_IDR_SLICE:
7488 7489 7490 7491
            if (h->nal_unit_type != NAL_IDR_SLICE) {
                av_log(h->s.avctx, AV_LOG_ERROR, "Invalid mix of idr and non-idr slices");
                return -1;
            }
7492
            idr(h); //FIXME ensure we don't loose some frames if there is reordering
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7493
        case NAL_SLICE:
7494 7495 7496 7497 7498 7499 7500 7501
            init_get_bits(&hx->s.gb, ptr, bit_length);
            hx->intra_gb_ptr=
            hx->inter_gb_ptr= &hx->s.gb;
            hx->s.data_partitioning = 0;

            if((err = decode_slice_header(hx, h)))
               break;

7502 7503 7504 7505 7506
            if (s->avctx->hwaccel && h->current_slice == 1) {
                if (s->avctx->hwaccel->start_frame(s->avctx, NULL, 0) < 0)
                    return -1;
            }

7507 7508 7509
            s->current_picture_ptr->key_frame |=
                    (hx->nal_unit_type == NAL_IDR_SLICE) ||
                    (h->sei_recovery_frame_cnt >= 0);
7510 7511
            if(hx->redundant_pic_count==0 && hx->s.hurry_up < 5
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
7512
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
7513
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
7514
               && avctx->skip_frame < AVDISCARD_ALL){
7515 7516 7517 7518
                if(avctx->hwaccel) {
                    if (avctx->hwaccel->decode_slice(avctx, &buf[buf_index - consumed], consumed) < 0)
                        return -1;
                }else
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cehoyos committed
7519
                if(CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU){
7520
                    static const uint8_t start_code[] = {0x00, 0x00, 0x01};
7521 7522
                    ff_vdpau_add_data_chunk(s, start_code, sizeof(start_code));
                    ff_vdpau_add_data_chunk(s, &buf[buf_index - consumed], consumed );
7523
                }else
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7524
                    context_count++;
7525
            }
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7526 7527
            break;
        case NAL_DPA:
7528 7529 7530 7531
            init_get_bits(&hx->s.gb, ptr, bit_length);
            hx->intra_gb_ptr=
            hx->inter_gb_ptr= NULL;
            hx->s.data_partitioning = 1;
7532

7533
            err = decode_slice_header(hx, h);
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7534 7535
            break;
        case NAL_DPB:
7536 7537
            init_get_bits(&hx->intra_gb, ptr, bit_length);
            hx->intra_gb_ptr= &hx->intra_gb;
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michaelni committed
7538 7539
            break;
        case NAL_DPC:
7540 7541
            init_get_bits(&hx->inter_gb, ptr, bit_length);
            hx->inter_gb_ptr= &hx->inter_gb;
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7542

7543
            if(hx->redundant_pic_count==0 && hx->intra_gb_ptr && hx->s.data_partitioning
7544
               && s->context_initialized
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michael committed
7545
               && s->hurry_up < 5
7546
               && (avctx->skip_frame < AVDISCARD_NONREF || hx->nal_ref_idc)
7547
               && (avctx->skip_frame < AVDISCARD_BIDIR  || hx->slice_type_nos!=FF_B_TYPE)
7548
               && (avctx->skip_frame < AVDISCARD_NONKEY || hx->slice_type_nos==FF_I_TYPE)
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michael committed
7549
               && avctx->skip_frame < AVDISCARD_ALL)
7550
                context_count++;
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7551 7552
            break;
        case NAL_SEI:
7553
            init_get_bits(&s->gb, ptr, bit_length);
7554
            ff_h264_decode_sei(h);
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7555 7556 7557
            break;
        case NAL_SPS:
            init_get_bits(&s->gb, ptr, bit_length);
7558
            ff_h264_decode_seq_parameter_set(h);
7559

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michaelni committed
7560 7561
            if(s->flags& CODEC_FLAG_LOW_DELAY)
                s->low_delay=1;
7562

7563 7564
            if(avctx->has_b_frames < 2)
                avctx->has_b_frames= !s->low_delay;
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7565 7566 7567
            break;
        case NAL_PPS:
            init_get_bits(&s->gb, ptr, bit_length);
7568

7569
            ff_h264_decode_picture_parameter_set(h, bit_length);
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7570 7571

            break;
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7572 7573 7574 7575 7576 7577
        case NAL_AUD:
        case NAL_END_SEQUENCE:
        case NAL_END_STREAM:
        case NAL_FILLER_DATA:
        case NAL_SPS_EXT:
        case NAL_AUXILIARY_SLICE:
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michaelni committed
7578
            break;
7579
        default:
7580
            av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n", h->nal_unit_type, bit_length);
7581 7582
        }

7583 7584 7585 7586 7587 7588 7589 7590 7591 7592
        if(context_count == h->max_contexts) {
            execute_decode_slices(h, context_count);
            context_count = 0;
        }

        if (err < 0)
            av_log(h->s.avctx, AV_LOG_ERROR, "decode_slice_header error\n");
        else if(err == 1) {
            /* Slice could not be decoded in parallel mode, copy down
             * NAL unit stuff to context 0 and restart. Note that
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diego committed
7593
             * rbsp_buffer is not transferred, but since we no longer
7594 7595 7596 7597 7598 7599 7600 7601 7602
             * run in parallel mode this should not be an issue. */
            h->nal_unit_type = hx->nal_unit_type;
            h->nal_ref_idc   = hx->nal_ref_idc;
            hx = h;
            goto again;
        }
    }
    if(context_count)
        execute_decode_slices(h, context_count);
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7603 7604 7605 7606
    return buf_index;
}

/**
7607
 * returns the number of bytes consumed for building the current frame
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7608 7609
 */
static int get_consumed_bytes(MpegEncContext *s, int pos, int buf_size){
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7610
        if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
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michaelni committed
7611 7612 7613 7614 7615
        if(pos+10>buf_size) pos=buf_size; // oops ;)

        return pos;
}

7616
static int decode_frame(AVCodecContext *avctx,
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7617
                             void *data, int *data_size,
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7618
                             const uint8_t *buf, int buf_size)
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7619 7620 7621
{
    H264Context *h = avctx->priv_data;
    MpegEncContext *s = &h->s;
7622
    AVFrame *pict = data;
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7623
    int buf_index;
7624

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7625
    s->flags= avctx->flags;
7626
    s->flags2= avctx->flags2;
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7627

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7628
   /* end of stream, output what is still in the buffers */
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7629
    if (buf_size == 0) {
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7630 7631 7632 7633 7634 7635
        Picture *out;
        int i, out_idx;

//FIXME factorize this with the output code below
        out = h->delayed_pic[0];
        out_idx = 0;
7636
        for(i=1; h->delayed_pic[i] && (h->delayed_pic[i]->poc && !h->delayed_pic[i]->key_frame); i++)
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michael committed
7637 7638 7639 7640 7641 7642 7643 7644 7645 7646 7647 7648 7649
            if(h->delayed_pic[i]->poc < out->poc){
                out = h->delayed_pic[i];
                out_idx = i;
            }

        for(i=out_idx; h->delayed_pic[i]; i++)
            h->delayed_pic[i] = h->delayed_pic[i+1];

        if(out){
            *data_size = sizeof(AVFrame);
            *pict= *(AVFrame*)out;
        }

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7650 7651
        return 0;
    }
7652

7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670
    if(h->is_avc && !h->got_avcC) {
        int i, cnt, nalsize;
        unsigned char *p = avctx->extradata;
        if(avctx->extradata_size < 7) {
            av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
            return -1;
        }
        if(*p != 1) {
            av_log(avctx, AV_LOG_ERROR, "Unknown avcC version %d\n", *p);
            return -1;
        }
        /* sps and pps in the avcC always have length coded with 2 bytes,
           so put a fake nal_length_size = 2 while parsing them */
        h->nal_length_size = 2;
        // Decode sps from avcC
        cnt = *(p+5) & 0x1f; // Number of sps
        p += 6;
        for (i = 0; i < cnt; i++) {
7671
            nalsize = AV_RB16(p) + 2;
7672
            if(decode_nal_units(h, p, nalsize) < 0) {
7673 7674 7675 7676
                av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
                return -1;
            }
            p += nalsize;
7677
        }
7678 7679 7680
        // Decode pps from avcC
        cnt = *(p++); // Number of pps
        for (i = 0; i < cnt; i++) {
7681
            nalsize = AV_RB16(p) + 2;
7682 7683 7684 7685 7686
            if(decode_nal_units(h, p, nalsize)  != nalsize) {
                av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
                return -1;
            }
            p += nalsize;
7687
        }
7688 7689 7690 7691 7692 7693
        // Now store right nal length size, that will be use to parse all other nals
        h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
        // Do not reparse avcC
        h->got_avcC = 1;
    }

7694
    if(!h->got_avcC && !h->is_avc && s->avctx->extradata_size){
7695
        if(decode_nal_units(h, s->avctx->extradata, s->avctx->extradata_size) < 0)
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7696
            return -1;
7697
        h->got_avcC = 1;
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7698 7699 7700
    }

    buf_index=decode_nal_units(h, buf, buf_size);
7701
    if(buf_index < 0)
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michaelni committed
7702 7703
        return -1;

7704
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) && !s->current_picture_ptr){
7705
        if (avctx->skip_frame >= AVDISCARD_NONREF || s->hurry_up) return 0;
7706 7707 7708 7709
        av_log(avctx, AV_LOG_ERROR, "no frame!\n");
        return -1;
    }

7710 7711 7712 7713
    if(!(s->flags2 & CODEC_FLAG2_CHUNKS) || (s->mb_y >= s->mb_height && s->mb_height)){
        Picture *out = s->current_picture_ptr;
        Picture *cur = s->current_picture_ptr;
        int i, pics, cross_idr, out_of_order, out_idx;
7714

7715 7716 7717 7718 7719
        s->mb_y= 0;

        s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_H264;
        s->current_picture_ptr->pict_type= s->pict_type;

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cehoyos committed
7720
        if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
7721
            ff_vdpau_h264_set_reference_frames(s);
7722

7723
        if(!s->dropable) {
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michael committed
7724
            execute_ref_pic_marking(h, h->mmco, h->mmco_index);
7725 7726
            h->prev_poc_msb= h->poc_msb;
            h->prev_poc_lsb= h->poc_lsb;
7727
        }
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7728 7729
        h->prev_frame_num_offset= h->frame_num_offset;
        h->prev_frame_num= h->frame_num;
7730

7731 7732 7733 7734 7735
        if (avctx->hwaccel) {
            if (avctx->hwaccel->end_frame(avctx) < 0)
                av_log(avctx, AV_LOG_ERROR, "hardware accelerator failed to decode picture\n");
        }

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cehoyos committed
7736
        if (CONFIG_H264_VDPAU_DECODER && s->avctx->codec->capabilities&CODEC_CAP_HWACCEL_VDPAU)
7737
            ff_vdpau_h264_picture_complete(s);
7738

7739 7740 7741 7742 7743 7744 7745 7746 7747 7748 7749 7750
        /*
         * FIXME: Error handling code does not seem to support interlaced
         * when slices span multiple rows
         * The ff_er_add_slice calls don't work right for bottom
         * fields; they cause massive erroneous error concealing
         * Error marking covers both fields (top and bottom).
         * This causes a mismatched s->error_count
         * and a bad error table. Further, the error count goes to
         * INT_MAX when called for bottom field, because mb_y is
         * past end by one (callers fault) and resync_mb_y != 0
         * causes problems for the first MB line, too.
         */
7751
        if (!FIELD_PICTURE)
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andoma committed
7752
            ff_er_frame_end(s);
7753 7754 7755

        MPV_frame_end(s);

7756
        if (cur->field_poc[0]==INT_MAX || cur->field_poc[1]==INT_MAX) {
7757 7758 7759 7760
            /* Wait for second field. */
            *data_size = 0;

        } else {
7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796 7797 7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808 7809 7810 7811 7812 7813 7814
            cur->repeat_pict = 0;

            /* Signal interlacing information externally. */
            /* Prioritize picture timing SEI information over used decoding process if it exists. */
            if(h->sps.pic_struct_present_flag){
                switch (h->sei_pic_struct)
                {
                case SEI_PIC_STRUCT_FRAME:
                    cur->interlaced_frame = 0;
                    break;
                case SEI_PIC_STRUCT_TOP_FIELD:
                case SEI_PIC_STRUCT_BOTTOM_FIELD:
                case SEI_PIC_STRUCT_TOP_BOTTOM:
                case SEI_PIC_STRUCT_BOTTOM_TOP:
                    cur->interlaced_frame = 1;
                    break;
                case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
                case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
                    // Signal the possibility of telecined film externally (pic_struct 5,6)
                    // From these hints, let the applications decide if they apply deinterlacing.
                    cur->repeat_pict = 1;
                    cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
                    break;
                case SEI_PIC_STRUCT_FRAME_DOUBLING:
                    // Force progressive here, as doubling interlaced frame is a bad idea.
                    cur->interlaced_frame = 0;
                    cur->repeat_pict = 2;
                    break;
                case SEI_PIC_STRUCT_FRAME_TRIPLING:
                    cur->interlaced_frame = 0;
                    cur->repeat_pict = 4;
                    break;
                }
            }else{
                /* Derive interlacing flag from used decoding process. */
                cur->interlaced_frame = FIELD_OR_MBAFF_PICTURE;
            }

            if (cur->field_poc[0] != cur->field_poc[1]){
                /* Derive top_field_first from field pocs. */
                cur->top_field_first = cur->field_poc[0] < cur->field_poc[1];
            }else{
                if(cur->interlaced_frame || h->sps.pic_struct_present_flag){
                    /* Use picture timing SEI information. Even if it is a information of a past frame, better than nothing. */
                    if(h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
                      || h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
                        cur->top_field_first = 1;
                    else
                        cur->top_field_first = 0;
                }else{
                    /* Most likely progressive */
                    cur->top_field_first = 0;
                }
            }
7815

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andoma committed
7816
        //FIXME do something with unavailable reference frames
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7817

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andoma committed
7818
            /* Sort B-frames into display order */
7819

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7820 7821 7822 7823 7824
            if(h->sps.bitstream_restriction_flag
               && s->avctx->has_b_frames < h->sps.num_reorder_frames){
                s->avctx->has_b_frames = h->sps.num_reorder_frames;
                s->low_delay = 0;
            }
7825

7826 7827 7828 7829 7830 7831
            if(   s->avctx->strict_std_compliance >= FF_COMPLIANCE_STRICT
               && !h->sps.bitstream_restriction_flag){
                s->avctx->has_b_frames= MAX_DELAYED_PIC_COUNT;
                s->low_delay= 0;
            }

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andoma committed
7832 7833
            pics = 0;
            while(h->delayed_pic[pics]) pics++;
7834

7835
            assert(pics <= MAX_DELAYED_PIC_COUNT);
7836

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andoma committed
7837 7838 7839
            h->delayed_pic[pics++] = cur;
            if(cur->reference == 0)
                cur->reference = DELAYED_PIC_REF;
7840

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andoma committed
7841 7842
            out = h->delayed_pic[0];
            out_idx = 0;
7843
            for(i=1; h->delayed_pic[i] && (h->delayed_pic[i]->poc && !h->delayed_pic[i]->key_frame); i++)
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andoma committed
7844 7845 7846 7847
                if(h->delayed_pic[i]->poc < out->poc){
                    out = h->delayed_pic[i];
                    out_idx = i;
                }
7848
            cross_idr = !h->delayed_pic[0]->poc || !!h->delayed_pic[i] || h->delayed_pic[0]->key_frame;
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lorenm committed
7849

7850
            out_of_order = !cross_idr && out->poc < h->outputed_poc;
7851

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andoma committed
7852 7853
            if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames >= h->sps.num_reorder_frames)
                { }
7854
            else if((out_of_order && pics-1 == s->avctx->has_b_frames && s->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT)
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               || (s->low_delay &&
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                ((!cross_idr && out->poc > h->outputed_poc + 2)
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                 || cur->pict_type == FF_B_TYPE)))
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            {
                s->low_delay = 0;
                s->avctx->has_b_frames++;
            }

            if(out_of_order || pics > s->avctx->has_b_frames){
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                out->reference &= ~DELAYED_PIC_REF;
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                for(i=out_idx; h->delayed_pic[i]; i++)
                    h->delayed_pic[i] = h->delayed_pic[i+1];
            }
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            if(!out_of_order && pics > s->avctx->has_b_frames){
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                *data_size = sizeof(AVFrame);
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                h->outputed_poc = out->poc;
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                *pict= *(AVFrame*)out;
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            }else{
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                av_log(avctx, AV_LOG_DEBUG, "no picture\n");
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            }
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        }
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    }

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    assert(pict->data[0] || !*data_size);
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    ff_print_debug_info(s, pict);
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//printf("out %d\n", (int)pict->data[0]);
#if 0 //?

    /* Return the Picture timestamp as the frame number */
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    /* we subtract 1 because it is added on utils.c     */
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    avctx->frame_number = s->picture_number - 1;
#endif
    return get_consumed_bytes(s, buf_index, buf_size);
}
#if 0
static inline void fill_mb_avail(H264Context *h){
    MpegEncContext * const s = &h->s;
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    const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
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    if(s->mb_y){
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        h->mb_avail[0]= s->mb_x                 && h->slice_table[mb_xy - s->mb_stride - 1] == h->slice_num;
        h->mb_avail[1]=                            h->slice_table[mb_xy - s->mb_stride    ] == h->slice_num;
        h->mb_avail[2]= s->mb_x+1 < s->mb_width && h->slice_table[mb_xy - s->mb_stride + 1] == h->slice_num;
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    }else{
        h->mb_avail[0]=
        h->mb_avail[1]=
        h->mb_avail[2]= 0;
    }
    h->mb_avail[3]= s->mb_x && h->slice_table[mb_xy - 1] == h->slice_num;
    h->mb_avail[4]= 1; //FIXME move out
    h->mb_avail[5]= 0; //FIXME move out
}
#endif

7910
#ifdef TEST
7911
#undef printf
7912
#undef random
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#define COUNT 8000
#define SIZE (COUNT*40)
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int main(void){
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    int i;
    uint8_t temp[SIZE];
    PutBitContext pb;
    GetBitContext gb;
//    int int_temp[10000];
    DSPContext dsp;
    AVCodecContext avctx;
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    dsputil_init(&dsp, &avctx);

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    init_put_bits(&pb, temp, SIZE);
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    printf("testing unsigned exp golomb\n");
    for(i=0; i<COUNT; i++){
        START_TIMER
        set_ue_golomb(&pb, i);
        STOP_TIMER("set_ue_golomb");
    }
    flush_put_bits(&pb);
7934

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    init_get_bits(&gb, temp, 8*SIZE);
    for(i=0; i<COUNT; i++){
        int j, s;
7938

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        s= show_bits(&gb, 24);
7940

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        START_TIMER
        j= get_ue_golomb(&gb);
        if(j != i){
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            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
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//            return -1;
        }
        STOP_TIMER("get_ue_golomb");
    }
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    init_put_bits(&pb, temp, SIZE);
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    printf("testing signed exp golomb\n");
    for(i=0; i<COUNT; i++){
        START_TIMER
        set_se_golomb(&pb, i - COUNT/2);
        STOP_TIMER("set_se_golomb");
    }
    flush_put_bits(&pb);
7959

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    init_get_bits(&gb, temp, 8*SIZE);
    for(i=0; i<COUNT; i++){
        int j, s;
7963

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        s= show_bits(&gb, 24);
7965

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        START_TIMER
        j= get_se_golomb(&gb);
        if(j != i - COUNT/2){
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            printf("mismatch! at %d (%d should be %d) bits:%6X\n", i, j, i, s);
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//            return -1;
        }
        STOP_TIMER("get_se_golomb");
    }

7975
#if 0
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    printf("testing 4x4 (I)DCT\n");
7977

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    DCTELEM block[16];
    uint8_t src[16], ref[16];
    uint64_t error= 0, max_error=0;

    for(i=0; i<COUNT; i++){
        int j;
//        printf("%d %d %d\n", r1, r2, (r2-r1)*16);
        for(j=0; j<16; j++){
            ref[j]= random()%255;
            src[j]= random()%255;
        }

        h264_diff_dct_c(block, src, ref, 4);
7991

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        //normalize
        for(j=0; j<16; j++){
//            printf("%d ", block[j]);
            block[j]= block[j]*4;
            if(j&1) block[j]= (block[j]*4 + 2)/5;
            if(j&4) block[j]= (block[j]*4 + 2)/5;
        }
//        printf("\n");
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        s->dsp.h264_idct_add(ref, block, 4);
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/*        for(j=0; j<16; j++){
            printf("%d ", ref[j]);
        }
        printf("\n");*/
8006

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        for(j=0; j<16; j++){
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            int diff= FFABS(src[j] - ref[j]);
8009

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            error+= diff*diff;
            max_error= FFMAX(max_error, diff);
        }
    }
    printf("error=%f max_error=%d\n", ((float)error)/COUNT/16, (int)max_error );
    printf("testing quantizer\n");
    for(qp=0; qp<52; qp++){
        for(i=0; i<16; i++)
            src1_block[i]= src2_block[i]= random()%255;
8019

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    }
    printf("Testing NAL layer\n");
8022

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    uint8_t bitstream[COUNT];
    uint8_t nal[COUNT*2];
    H264Context h;
    memset(&h, 0, sizeof(H264Context));
8027

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    for(i=0; i<COUNT; i++){
        int zeros= i;
        int nal_length;
        int consumed;
        int out_length;
        uint8_t *out;
        int j;
8035

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        for(j=0; j<COUNT; j++){
            bitstream[j]= (random() % 255) + 1;
        }
8039

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        for(j=0; j<zeros; j++){
            int pos= random() % COUNT;
            while(bitstream[pos] == 0){
                pos++;
                pos %= COUNT;
            }
            bitstream[pos]=0;
        }
8048

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        START_TIMER
8050

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        nal_length= encode_nal(&h, nal, bitstream, COUNT, COUNT*2);
        if(nal_length<0){
            printf("encoding failed\n");
            return -1;
        }
8056

8057
        out= ff_h264_decode_nal(&h, nal, &out_length, &consumed, nal_length);
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        STOP_TIMER("NAL")
8060

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        if(out_length != COUNT){
            printf("incorrect length %d %d\n", out_length, COUNT);
            return -1;
        }
8065

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        if(consumed != nal_length){
            printf("incorrect consumed length %d %d\n", nal_length, consumed);
            return -1;
        }
8070

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        if(memcmp(bitstream, out, COUNT)){
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            printf("mismatch\n");
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            return -1;
        }
    }
8076
#endif
8077

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    printf("Testing RBSP\n");
8079 8080


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    return 0;
}
8083
#endif /* TEST */
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8086
static av_cold int decode_end(AVCodecContext *avctx)
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{
    H264Context *h = avctx->priv_data;
    MpegEncContext *s = &h->s;
8090
    int i;
8091

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    av_freep(&h->rbsp_buffer[0]);
    av_freep(&h->rbsp_buffer[1]);
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    free_tables(h); //FIXME cleanup init stuff perhaps
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    for(i = 0; i < MAX_SPS_COUNT; i++)
        av_freep(h->sps_buffers + i);

    for(i = 0; i < MAX_PPS_COUNT; i++)
        av_freep(h->pps_buffers + i);

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    MPV_common_end(s);

//    memset(h, 0, sizeof(H264Context));
8105

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    return 0;
}


AVCodec h264_decoder = {
    "h264",
    CODEC_TYPE_VIDEO,
    CODEC_ID_H264,
    sizeof(H264Context),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
8119
    /*CODEC_CAP_DRAW_HORIZ_BAND |*/ CODEC_CAP_DR1 | CODEC_CAP_DELAY,
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    .flush= flush_dpb,
8121
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
8122
    .pix_fmts= ff_hwaccel_pixfmt_list_420,
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};

8125
#if CONFIG_H264_VDPAU_DECODER
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AVCodec h264_vdpau_decoder = {
    "h264_vdpau",
    CODEC_TYPE_VIDEO,
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    CODEC_ID_H264,
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    sizeof(H264Context),
    decode_init,
    NULL,
    decode_end,
    decode_frame,
    CODEC_CAP_DR1 | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
    .flush= flush_dpb,
    .long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)"),
};
#endif

8141
#if CONFIG_SVQ3_DECODER
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#include "svq3.c"
8143
#endif