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Commit 7a649fb2 authored by Christophe Massiot's avatar Christophe Massiot
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* modules/stream_out/transrate: 

  - split transrate.c
  - you can specify a maximum gop length on which to perform transrating,
    to avoid adding to much delay in the sout pipeline (shaping= option)
  - fixed a bug where you couldn't transrate a transcoded stream
parent 291bf739
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modules/stream_out/transrate/Modules.am
View file @ 7a649fb2
SOURCES_stream_out_transrate = transrate.c getvlc.h putvlc.h
SOURCES_stream_out_transrate = transrate.c frame.c getvlc.h putvlc.h
modules/stream_out/transrate/frame.c 0 → 100644
View file @ 7a649fb2
/*****************************************************************************
* frame.c: MPEG2 video transrating module
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* Copyright (C) 2003 Antoine Missout
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
* $Id: frame.c,v 1.1 2004/03/03 11:20:52 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
* Antoine Missout
* Michel Lespinasse <walken@zoy.org>
* Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#define NDEBUG 1
#include <assert.h>
#include <math.h>
#include <vlc/vlc.h>
#include <vlc/sout.h>
#include <vlc/input.h>
#include "transrate.h"
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
static int Del ( sout_stream_t *, sout_stream_id_t * );
static int Send( sout_stream_t *, sout_stream_id_t *, sout_buffer_t * );
static int transrate_video_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
/****************************************************************************
* transrater, code from M2VRequantizer http://www.metakine.com/
****************************************************************************/
/* This is awful magic --Meuuh */
//#define REACT_DELAY (1024.0*128.0)
#define REACT_DELAY (256.0)
#define QUANT_I (1.7)
#define QUANT_P (1.4)
#define QUANT_P_INC (0.1)
#define B_HANDICAP 5
// notes:
//
// - intra block:
// - the quantiser is increment by one step
//
// - non intra block:
// - in P_FRAME we keep the original quantiser but drop the last coefficient
// if there is more than one
// - in B_FRAME we multiply the quantiser by a factor
//
// - I_FRAME is recoded when we're 5.0 * REACT_DELAY late
// - P_FRAME is recoded when we're 2.5 * REACT_DELAY late
// - B_FRAME are always recoded
// if we're getting *very* late (60 * REACT_DELAY)
//
// - intra blocks quantiser is incremented two step
// - drop a few coefficients but always keep the first one
// useful constants
enum
{
I_TYPE = 1,
P_TYPE = 2,
B_TYPE = 3
};
// gcc
#ifdef HAVE_BUILTIN_EXPECT
#define likely(x) __builtin_expect ((x) != 0, 1)
#define unlikely(x) __builtin_expect ((x) != 0, 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
#define BITS_IN_BUF (8)
#define LOG(msg) fprintf (stderr, msg)
#define LOGF(format, args...) fprintf (stderr, format, args)
static inline void bs_write( bs_transrate_t *s, unsigned int val, int n)
{
assert(n < 32);
assert(!(val & (0xffffffffU << n)));
while (unlikely(n >= s->i_bit_out))
{
s->p_w[0] = (s->i_bit_out_cache << s->i_bit_out ) | (val >> (n - s->i_bit_out));
s->p_w++;
n -= s->i_bit_out;
s->i_bit_out_cache = 0;
val &= ~(0xffffffffU << n);
s->i_bit_out = BITS_IN_BUF;
}
if (likely(n))
{
s->i_bit_out_cache = (s->i_bit_out_cache << n) | val;
s->i_bit_out -= n;
}
assert(s->i_bit_out > 0);
assert(s->i_bit_out <= BITS_IN_BUF);
}
static inline void bs_refill( bs_transrate_t *s )
{
assert((s->p_r - s->p_c) >= 1);
s->i_bit_in_cache |= s->p_c[0] << (24 - s->i_bit_in);
s->i_bit_in += 8;
s->p_c++;
}
static inline void bs_flush( bs_transrate_t *s, unsigned int n )
{
assert(s->i_bit_in >= n);
s->i_bit_in_cache <<= n;
s->i_bit_in -= n;
assert( (!n) || ((n>0) && !(s->i_bit_in_cache & 0x1)) );
while (unlikely(s->i_bit_in < 24)) bs_refill( s );
}
static inline unsigned int bs_read( bs_transrate_t *s, unsigned int n)
{
unsigned int Val = ((unsigned int)s->i_bit_in_cache) >> (32 - n);
bs_flush( s, n );
return Val;
}
static inline unsigned int bs_copy( bs_transrate_t *s, unsigned int n)
{
unsigned int Val = bs_read( s, n);
bs_write(s, Val, n);
return Val;
}
static inline void bs_flush_read( bs_transrate_t *s )
{
int i = s->i_bit_in & 0x7;
if( i )
{
assert(((unsigned int)bs->i_bit_in_cache) >> (32 - i) == 0);
s->i_bit_in_cache <<= i;
s->i_bit_in -= i;
}
s->p_c += -1 * (s->i_bit_in >> 3);
s->i_bit_in = 0;
}
static inline void bs_flush_write( bs_transrate_t *s )
{
if( s->i_bit_out != 8 ) bs_write(s, 0, s->i_bit_out);
}
/////---- begin ext mpeg code
const uint8_t non_linear_mquant_table[32] =
{
0, 1, 2, 3, 4, 5, 6, 7,
8,10,12,14,16,18,20,22,
24,28,32,36,40,44,48,52,
56,64,72,80,88,96,104,112
};
const uint8_t map_non_linear_mquant[113] =
{
0,1,2,3,4,5,6,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,
16,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21,21,21,22,22,
22,22,23,23,23,23,24,24,24,24,24,24,24,25,25,25,25,25,25,25,26,26,
26,26,26,26,26,26,27,27,27,27,27,27,27,27,28,28,28,28,28,28,28,29,
29,29,29,29,29,29,29,29,29,30,30,30,30,30,30,30,31,31,31,31,31
};
static int scale_quant( unsigned int q_scale_type, double quant )
{
int iquant;
if (q_scale_type)
{
iquant = (int) floor(quant+0.5);
/* clip mquant to legal (linear) range */
if (iquant<1) iquant = 1;
if (iquant>112) iquant = 112;
iquant = non_linear_mquant_table[map_non_linear_mquant[iquant]];
}
else
{
/* clip mquant to legal (linear) range */
iquant = (int)floor(quant+0.5);
if (iquant<2) iquant = 2;
if (iquant>62) iquant = 62;
iquant = (iquant/2)*2; // Must be *even*
}
return iquant;
}
static int increment_quant( transrate_t *tr, int quant )
{
if( tr->q_scale_type )
{
assert(quant >= 1 && quant <= 112 );
quant = map_non_linear_mquant[quant] + 1;
if( tr->picture_coding_type == P_TYPE )
quant += tr->level_p;
if( quant > 31) quant = 31;
quant = non_linear_mquant_table[quant];
}
else
{
assert(!(quant & 1));
quant += 2;
if( tr->picture_coding_type == P_TYPE )
quant += 2 * tr->level_p;
if (quant > 62) quant = 62;
}
return quant;
}
static inline int intmax( register int x, register int y )
{
return x < y ? y : x;
}
static inline int intmin( register int x, register int y )
{
return x < y ? x : y;
}
static int getNewQuant( transrate_t *tr, int curQuant)
{
bs_transrate_t *bs = &tr->bs;
double calc_quant, quant_to_use;
int mquant = 0;
switch ( tr->picture_coding_type )
{
case I_TYPE:
case P_TYPE:
mquant = increment_quant( tr, curQuant );
break;
case B_TYPE:
tr->quant_corr = (((bs->i_byte_in - (bs->p_r - 4 - bs->p_c)) / tr->fact_x) - (bs->i_byte_out + (bs->p_w - bs->p_ow))) / REACT_DELAY + B_HANDICAP;
calc_quant = curQuant * tr->current_fact_x;
quant_to_use = calc_quant - tr->quant_corr;
mquant = intmax(scale_quant( tr->q_scale_type, quant_to_use), increment_quant( tr, curQuant) );
break;
default:
assert(0);
break;
}
/*
LOGF("type: %s orig_quant: %3i calc_quant: %7.1f quant_corr: %7.1f using_quant: %3i\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
(int)curQuant, (float)calc_quant, (float)quant_corr, (int)mquant);
*/
assert(mquant >= curQuant);
return mquant;
}
static inline int isNotEmpty(RunLevel *blk)
{
return (blk->level);
}
#include "putvlc.h"
static void putAC( bs_transrate_t *bs, int run, int signed_level, int vlcformat)
{
int level, len;
const VLCtable *ptab = NULL;
level = (signed_level<0) ? -signed_level : signed_level; /* abs(signed_level) */
assert(!(run<0 || run>63 || level==0 || level>2047));
len = 0;
if (run<2 && level<41)
{
if (vlcformat) ptab = &dct_code_tab1a[run][level-1];
else ptab = &dct_code_tab1[run][level-1];
len = ptab->len;
}
else if (run<32 && level<6)
{
if (vlcformat) ptab = &dct_code_tab2a[run-2][level-1];
else ptab = &dct_code_tab2[run-2][level-1];
len = ptab->len;
}
if (len) /* a VLC code exists */
{
bs_write( bs, ptab->code, len);
bs_write( bs, signed_level<0, 1); /* sign */
}
else
{
bs_write( bs, 1l, 6); /* Escape */
bs_write( bs, run, 6); /* 6 bit code for run */
bs_write( bs, ((unsigned int)signed_level) & 0xFFF, 12);
}
}
static inline void putACfirst( bs_transrate_t *bs, int run, int val)
{
if (run==0 && (val==1 || val==-1)) bs_write( bs, 2|(val<0),2);
else putAC( bs, run,val,0);
}
static void putnonintrablk( bs_transrate_t *bs, RunLevel *blk)
{
assert(blk->level);
putACfirst( bs, blk->run, blk->level);
blk++;
while(blk->level)
{
putAC( bs, blk->run, blk->level, 0);
blk++;
}
bs_write( bs, 2,2);
}
#include "getvlc.h"
static const int non_linear_quantizer_scale [] =
{
0, 1, 2, 3, 4, 5, 6, 7,
8, 10, 12, 14, 16, 18, 20, 22,
24, 28, 32, 36, 40, 44, 48, 52,
56, 64, 72, 80, 88, 96, 104, 112
};
static inline int get_macroblock_modes( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
int macroblock_modes;
const MBtab * tab;
switch( tr->picture_coding_type)
{
case I_TYPE:
tab = MB_I + UBITS (bs->i_bit_in_cache, 1);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
if ((! ( tr->frame_pred_frame_dct)) && ( tr->picture_structure == FRAME_PICTURE))
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
case P_TYPE:
tab = MB_P + UBITS (bs->i_bit_in_cache, 5);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
if (tr->picture_structure != FRAME_PICTURE)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
return macroblock_modes;
}
else if (tr->frame_pred_frame_dct)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
macroblock_modes |= MC_FRAME;
return macroblock_modes;
}
else
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
}
case B_TYPE:
tab = MB_B + UBITS (bs->i_bit_in_cache, 6);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
if( tr->picture_structure != FRAME_PICTURE)
{
if (! (macroblock_modes & MACROBLOCK_INTRA))
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
return macroblock_modes;
}
else if (tr->frame_pred_frame_dct)
{
/* if (! (macroblock_modes & MACROBLOCK_INTRA)) */
macroblock_modes |= MC_FRAME;
return macroblock_modes;
}
else
{
if (macroblock_modes & MACROBLOCK_INTRA) goto intra;
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
{
intra:
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
}
default:
return 0;
}
}
static inline int get_quantizer_scale( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
int quantizer_scale_code;
quantizer_scale_code = UBITS (bs->i_bit_in_cache, 5);
bs_flush( bs, 5 );
if( tr->q_scale_type )
return non_linear_quantizer_scale[quantizer_scale_code];
else
return quantizer_scale_code << 1;
}
static inline int get_motion_delta( bs_transrate_t *bs, const int f_code )
{
int delta;
int sign;
const MVtab * tab;
if (bs->i_bit_in_cache & 0x80000000)
{
bs_copy( bs, 1 );
return 0;
}
else if (bs->i_bit_in_cache >= 0x0c000000)
{
tab = MV_4 + UBITS (bs->i_bit_in_cache, 4);
delta = (tab->delta << f_code) + 1;
bs_copy( bs, tab->len);
sign = SBITS (bs->i_bit_in_cache, 1);
bs_copy( bs, 1 );
if (f_code) delta += UBITS (bs->i_bit_in_cache, f_code);
bs_copy( bs, f_code);
return (delta ^ sign) - sign;
}
else
{
tab = MV_10 + UBITS (bs->i_bit_in_cache, 10);
delta = (tab->delta << f_code) + 1;
bs_copy( bs, tab->len);
sign = SBITS (bs->i_bit_in_cache, 1);
bs_copy( bs, 1);
if (f_code)
{
delta += UBITS (bs->i_bit_in_cache, f_code);
bs_copy( bs, f_code);
}
return (delta ^ sign) - sign;
}
}
static inline int get_dmv( bs_transrate_t *bs )
{
const DMVtab * tab;
tab = DMV_2 + UBITS (bs->i_bit_in_cache, 2);
bs_copy( bs, tab->len);
return tab->dmv;
}
static inline int get_coded_block_pattern( bs_transrate_t *bs )
{
const CBPtab * tab;
if (bs->i_bit_in_cache >= 0x20000000)
{
tab = CBP_7 + (UBITS (bs->i_bit_in_cache, 7) - 16);
bs_flush( bs, tab->len );
return tab->cbp;
}
else
{
tab = CBP_9 + UBITS (bs->i_bit_in_cache, 9);
bs_flush( bs, tab->len );
return tab->cbp;
}
}
static inline int get_luma_dc_dct_diff( bs_transrate_t *bs )
{
const DCtab * tab;
int size;
int dc_diff;
if (bs->i_bit_in_cache < 0xf8000000)
{
tab = DC_lum_5 + UBITS (bs->i_bit_in_cache, 5);
size = tab->size;
if (size)
{
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
}
else
{
bs_copy( bs, 3);
return 0;
}
}
else
{
tab = DC_long + (UBITS (bs->i_bit_in_cache, 9) - 0x1e0);
size = tab->size;
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
}
}
static inline int get_chroma_dc_dct_diff( bs_transrate_t *bs )
{
const DCtab * tab;
int size;
int dc_diff;
if (bs->i_bit_in_cache < 0xf8000000)
{
tab = DC_chrom_5 + UBITS (bs->i_bit_in_cache, 5);
size = tab->size;
if (size)
{
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
} else
{
bs_copy( bs, 2);
return 0;
}
}
else
{
tab = DC_long + (UBITS (bs->i_bit_in_cache, 10) - 0x3e0);
size = tab->size;
bs_copy( bs, tab->len + 1);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
}
}
static void get_intra_block_B14( bs_transrate_t *bs, const int i_qscale, const int i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
i += tab->run;
if (i >= 64) break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 0);
li = i;
}
bs_flush( bs, 1 );
continue;
}
else if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 0);
li = i;
}
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64 ) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_copy( bs, 2); /* end of block code */
}
static void get_intra_block_B15( bs_transrate_t *bs, const int i_qscale, int const i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B15_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64)
{
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 1);
li = i;
}
bs_flush( bs, 1 );
continue;
}
else
{
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check against buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 1);
li = i;
}
bs_flush( bs, 12 );
continue;
}
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B15_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_copy( bs, 4); /* end of block code */
}
static int get_non_intra_block_drop( transrate_t *tr, RunLevel *blk)
{
bs_transrate_t *bs = &tr->bs;
int i, li;
int val;
const DCTtab * tab;
RunLevel *sblk = blk + 1;
li = i = -1;
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14DC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
goto entry_1;
}
else goto entry_2;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
entry_1:
i += tab->run;
if (i >= 64) break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1); /* if (bitstream_get (1)) val = -val; */
blk->level = val;
blk->run = i - li - 1;
li = i;
blk++;
bs_flush( bs, 1 );
continue;
}
entry_2:
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
blk->level = val;
blk->run = i - li - 1;
li = i;
blk++;
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_flush( bs, 2 ); /* dump end of block code */
// remove last coeff
if (blk != sblk)
{
blk--;
}
// remove more coeffs if very late
if (tr->level_p >= 4 && (blk != sblk))
{
blk--;
if (tr->level_p >= 5 && (blk != sblk))
{
blk--;
if (tr->level_p >= 6 && (blk != sblk))
{
blk--;
if (tr->level_p >= 7 && (blk != sblk))
blk--;
}
}
}
blk->level = 0;
return i;
}
static int get_non_intra_block_rq( bs_transrate_t *bs, RunLevel *blk, const int i_qscale, const int i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return 0;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = -1;
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14DC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
goto entry_1;
}
else goto entry_2;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
entry_1:
i += tab->run;
if (i >= 64)
break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
blk->level = (val * i_qscale) / i_qscale_new;
blk->run = i - li - 1;
li = i;
blk++;
}
//if ( ((val) && (tab->level < tst)) || ((!val) && (tab->level >= tst)) )
// LOGF("level: %i val: %i tst : %i q: %i nq : %i\n", tab->level, val, tst, q, nq);
bs_flush( bs, 1 );
continue;
}
entry_2:
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
blk->level = (val * i_qscale) / i_qscale_new;
blk->run = i - li - 1;
li = i;
blk++;
}
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_flush( bs, 2 ); /* dump end of block code */
blk->level = 0;
return i;
}
static void motion_fr_frame( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0] );
get_motion_delta( bs, f_code[1] );
}
static void motion_fr_field( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fr_dmv( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0]);
get_dmv( bs );
get_motion_delta( bs, f_code[1]);
get_dmv( bs );
}
static void motion_fi_field( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fi_16x8( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fi_dmv( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0]);
get_dmv( bs );
get_motion_delta( bs, f_code[1]);
get_dmv( bs );
}
#define MOTION_CALL(routine,direction) \
do { \
if ((direction) & MACROBLOCK_MOTION_FORWARD) \
routine( bs, tr->f_code[0]); \
if ((direction) & MACROBLOCK_MOTION_BACKWARD) \
routine( bs, tr->f_code[1]); \
} while (0)
#define NEXT_MACROBLOCK \
do { \
tr->h_offset += 16; \
if( tr->h_offset == tr->horizontal_size_value) \
{ \
tr->v_offset += 16; \
if (tr->v_offset > (tr->vertical_size_value - 16)) return; \
tr->h_offset = 0; \
} \
} while (0)
static void putmbdata( transrate_t *tr, int macroblock_modes )
{
bs_transrate_t *bs = &tr->bs;
bs_write( bs,
mbtypetab[tr->picture_coding_type-1][macroblock_modes&0x1F].code,
mbtypetab[tr->picture_coding_type-1][macroblock_modes&0x1F].len);
switch ( tr->picture_coding_type)
{
case I_TYPE:
if ((! (tr->frame_pred_frame_dct)) && (tr->picture_structure == FRAME_PICTURE))
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
break;
case P_TYPE:
if (tr->picture_structure != FRAME_PICTURE)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
break;
}
else if (tr->frame_pred_frame_dct) break;
else
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
break;
}
case B_TYPE:
if (tr->picture_structure != FRAME_PICTURE)
{
if (! (macroblock_modes & MACROBLOCK_INTRA))
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
break;
}
else if (tr->frame_pred_frame_dct) break;
else
{
if (macroblock_modes & MACROBLOCK_INTRA) goto intra;
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
{
intra:
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
}
break;
}
}
}
static inline void put_quantiser( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
bs_write( bs, tr->q_scale_type ? map_non_linear_mquant[tr->new_quantizer_scale] : tr->new_quantizer_scale >> 1, 5);
tr->last_coded_scale = tr->new_quantizer_scale;
}
static int slice_init( transrate_t *tr, int code)
{
bs_transrate_t *bs = &tr->bs;
int offset;
const MBAtab * mba;
tr->v_offset = (code - 1) * 16;
tr->quantizer_scale = get_quantizer_scale( tr );
if ( tr->picture_coding_type == P_TYPE)
{
tr->new_quantizer_scale = tr->quantizer_scale;
}
else
{
tr->new_quantizer_scale = getNewQuant(tr, tr->quantizer_scale);
}
put_quantiser( tr );
/*LOGF("************************\nstart of slice %i in %s picture. ori quant: %i new quant: %i\n", code,
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
quantizer_scale, new_quantizer_scale);*/
/* ignore intra_slice and all the extra data */
while (bs->i_bit_in_cache & 0x80000000)
{
bs_flush( bs, 9 );
}
/* decode initial macroblock address increment */
offset = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x08000000)
{
mba = MBA_5 + (UBITS (bs->i_bit_in_cache, 6) - 2);
break;
}
else if (bs->i_bit_in_cache >= 0x01800000)
{
mba = MBA_11 + (UBITS (bs->i_bit_in_cache, 12) - 24);
break;
}
else if( UBITS (bs->i_bit_in_cache, 12 ) == 8 )
{
/* macroblock_escape */
offset += 33;
bs_copy( bs, 11);
}
else
{
return -1;
}
}
bs_copy( bs, mba->len + 1);
tr->h_offset = (offset + mba->mba) << 4;
while( tr->h_offset - (int)tr->horizontal_size_value >= 0)
{
tr->h_offset -= tr->horizontal_size_value;
tr->v_offset += 16;
}
if( tr->v_offset > tr->vertical_size_value - 16 )
{
return -1;
}
return 0;
}
static void mpeg2_slice( transrate_t *tr, const int code )
{
bs_transrate_t *bs = &tr->bs;
if( slice_init( tr, code ) )
{
return;
}
for( ;; )
{
int macroblock_modes;
int mba_inc;
const MBAtab * mba;
macroblock_modes = get_macroblock_modes( tr );
if (macroblock_modes & MACROBLOCK_QUANT) tr->quantizer_scale = get_quantizer_scale( tr );
//LOGF("blk %i : ", h_offset >> 4);
if (macroblock_modes & MACROBLOCK_INTRA)
{
//LOG("intra "); if (macroblock_modes & MACROBLOCK_QUANT) LOGF("got new quant: %i ", quantizer_scale);
tr->new_quantizer_scale = increment_quant( tr, tr->quantizer_scale);
if (tr->last_coded_scale == tr->new_quantizer_scale) macroblock_modes &= 0xFFFFFFEF; // remove MACROBLOCK_QUANT
else macroblock_modes |= MACROBLOCK_QUANT; //add MACROBLOCK_QUANT
putmbdata( tr, macroblock_modes);
if (macroblock_modes & MACROBLOCK_QUANT) put_quantiser( tr );
//if (macroblock_modes & MACROBLOCK_QUANT) LOGF("put new quant: %i ", new_quantizer_scale);
if (tr->concealment_motion_vectors)
{
if (tr->picture_structure != FRAME_PICTURE)
{
bs_copy( bs, 1); /* remove field_select */
}
/* like motion_frame, but parsing without actual motion compensation */
get_motion_delta( bs, tr->f_code[0][0]);
get_motion_delta( bs, tr->f_code[0][1]);
bs_copy( bs, 1); /* remove marker_bit */
}
if( tr->intra_vlc_format )
{
/* Luma */
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
/* Chroma */
get_chroma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_chroma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
}
else
{
/* Luma */
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
/* Chroma */
get_chroma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_chroma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
}
}
else
{
RunLevel block[6][65]; // terminated by level = 0, so we need 64+1
int new_coded_block_pattern = 0;
// begin saving data
int batb;
uint8_t p_n_ow[32], *p_n_w,
*p_o_ow = bs->p_ow, *p_o_w = bs->p_w;
uint32_t i_n_bit_out, i_n_bit_out_cache,
i_o_bit_out = bs->i_bit_out, i_o_bit_out_cache = bs->i_bit_out_cache;
bs->i_bit_out_cache = 0; bs->i_bit_out = BITS_IN_BUF;
bs->p_ow = bs->p_w = p_n_ow;
if (tr->picture_structure == FRAME_PICTURE)
switch (macroblock_modes & MOTION_TYPE_MASK)
{
case MC_FRAME: MOTION_CALL (motion_fr_frame, macroblock_modes); break;
case MC_FIELD: MOTION_CALL (motion_fr_field, macroblock_modes); break;
case MC_DMV: MOTION_CALL (motion_fr_dmv, MACROBLOCK_MOTION_FORWARD); break;
}
else
switch (macroblock_modes & MOTION_TYPE_MASK)
{
case MC_FIELD: MOTION_CALL (motion_fi_field, macroblock_modes); break;
case MC_16X8: MOTION_CALL (motion_fi_16x8, macroblock_modes); break;
case MC_DMV: MOTION_CALL (motion_fi_dmv, MACROBLOCK_MOTION_FORWARD); break;
}
assert(bs->p_w - bs->p_ow < 32);
p_n_w = bs->p_w;
i_n_bit_out = bs->i_bit_out;
i_n_bit_out_cache = bs->i_bit_out_cache;
assert(bs->p_ow == p_n_ow);
bs->i_bit_out = i_o_bit_out ;
bs->i_bit_out_cache = i_o_bit_out_cache;
bs->p_ow = p_o_ow;
bs->p_w = p_o_w;
// end saving data
if ( tr->picture_coding_type == P_TYPE) tr->new_quantizer_scale = tr->quantizer_scale;
else tr->new_quantizer_scale = getNewQuant( tr, tr->quantizer_scale);
//LOG("non intra "); if (macroblock_modes & MACROBLOCK_QUANT) LOGF("got new quant: %i ", quantizer_scale);
if (macroblock_modes & MACROBLOCK_PATTERN)
{
const int cbp = get_coded_block_pattern( bs );
if( tr->picture_coding_type == P_TYPE )
{
if( cbp&0x20 ) get_non_intra_block_drop( tr, block[0] );
if( cbp&0x10 ) get_non_intra_block_drop( tr, block[1] );
if( cbp&0x08 ) get_non_intra_block_drop( tr, block[2] );
if( cbp&0x04 ) get_non_intra_block_drop( tr, block[3] );
if( cbp&0x02 ) get_non_intra_block_drop( tr, block[4] );
if( cbp&0x01 ) get_non_intra_block_drop( tr, block[5] );
new_coded_block_pattern = cbp;
}
else
{
if( cbp&0x20 )
{
get_non_intra_block_rq( bs, block[0], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[0] ) ) new_coded_block_pattern |= 0x20;
}
if( cbp&0x10 )
{
get_non_intra_block_rq( bs, block[1], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[1] ) ) new_coded_block_pattern |= 0x10;
}
if( cbp&0x08 )
{
get_non_intra_block_rq( bs, block[2], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[2] ) ) new_coded_block_pattern |= 0x08;
}
if( cbp&0x04 )
{
get_non_intra_block_rq( bs, block[3], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[3] ) ) new_coded_block_pattern |= 0x04;
}
if( cbp&0x02 )
{
get_non_intra_block_rq( bs, block[4], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[4] ) ) new_coded_block_pattern |= 0x02;
}
if( cbp&0x01 )
{
get_non_intra_block_rq( bs, block[5], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[5] ) ) new_coded_block_pattern |= 0x01;
}
if( !new_coded_block_pattern) macroblock_modes &= 0xFFFFFFED; // remove MACROBLOCK_PATTERN and MACROBLOCK_QUANT flag
}
}
if (tr->last_coded_scale == tr->new_quantizer_scale) macroblock_modes &= 0xFFFFFFEF; // remove MACROBLOCK_QUANT
else if (macroblock_modes & MACROBLOCK_PATTERN) macroblock_modes |= MACROBLOCK_QUANT; //add MACROBLOCK_QUANT
assert( (macroblock_modes & MACROBLOCK_PATTERN) || !(macroblock_modes & MACROBLOCK_QUANT) );
putmbdata( tr, macroblock_modes);
if( macroblock_modes & MACROBLOCK_QUANT )
{
put_quantiser( tr );
}
// put saved motion data...
for (batb = 0; batb < (p_n_w - p_n_ow); batb++)
{
bs_write( bs, p_n_ow[batb], 8 );
}
bs_write( bs, i_n_bit_out_cache, BITS_IN_BUF - i_n_bit_out);
// end saved motion data...
if (macroblock_modes & MACROBLOCK_PATTERN)
{
/* Write CBP */
bs_write( bs, cbptable[new_coded_block_pattern].code,cbptable[new_coded_block_pattern].len);
if (new_coded_block_pattern & 0x20) putnonintrablk( bs, block[0]);
if (new_coded_block_pattern & 0x10) putnonintrablk( bs, block[1]);
if (new_coded_block_pattern & 0x08) putnonintrablk( bs, block[2]);
if (new_coded_block_pattern & 0x04) putnonintrablk( bs, block[3]);
if (new_coded_block_pattern & 0x02) putnonintrablk( bs, block[4]);
if (new_coded_block_pattern & 0x01) putnonintrablk( bs, block[5]);
}
}
//LOGF("\n\to: %i c: %i n: %i\n", quantizer_scale, last_coded_scale, new_quantizer_scale);
NEXT_MACROBLOCK;
mba_inc = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x10000000)
{
mba = MBA_5 + (UBITS (bs->i_bit_in_cache, 5) - 2);
break;
}
else if (bs->i_bit_in_cache >= 0x03000000)
{
mba = MBA_11 + (UBITS (bs->i_bit_in_cache, 11) - 24);
break;
}
else if( UBITS (bs->i_bit_in_cache, 11 ) == 8 )
{
/* macroblock_escape */
mba_inc += 33;
bs_copy( bs, 11);
}
else
{
/* EOS or error */
return;
}
}
bs_copy( bs, mba->len);
mba_inc += mba->mba;
while( mba_inc-- )
{
NEXT_MACROBLOCK;
}
}
}
/////---- end ext mpeg code
static int do_next_start_code( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
uint8_t ID;
// get start code
ID = bs->p_c[0];
/* Copy one byte */
*bs->p_w++ = *bs->p_c++;
if (ID == 0x00) // pic header
{
tr->picture_coding_type = (bs->p_c[1] >> 3) & 0x7;
bs->p_c[1] |= 0x7; bs->p_c[2] = 0xFF; bs->p_c[3] |= 0xF8; // vbv_delay is now 0xFFFF
memcpy(bs->p_w, bs->p_c, 4);
bs->p_c += 4;
bs->p_w += 4;
}
else if (ID == 0xB3) // seq header
{
tr->horizontal_size_value = (bs->p_c[0] << 4) | (bs->p_c[1] >> 4);
tr->vertical_size_value = ((bs->p_c[1] & 0xF) << 8) | bs->p_c[2];
if(!tr->horizontal_size_value || !tr->vertical_size_value )
{
return -1;
}
memcpy(bs->p_w, bs->p_c, 8 );
bs->p_c += 8;
bs->p_w += 8;
}
else if (ID == 0xB5) // extension
{
if ((bs->p_c[0] >> 4) == 0x8) // pic coding ext
{
tr->f_code[0][0] = (bs->p_c[0] & 0xF) - 1;
tr->f_code[0][1] = (bs->p_c[1] >> 4) - 1;
tr->f_code[1][0] = (bs->p_c[1] & 0xF) - 1;
tr->f_code[1][1] = (bs->p_c[2] >> 4) - 1;
/* tr->intra_dc_precision = (bs->p_c[2] >> 2) & 0x3; */
tr->picture_structure = bs->p_c[2] & 0x3;
tr->frame_pred_frame_dct = (bs->p_c[3] >> 6) & 0x1;
tr->concealment_motion_vectors = (bs->p_c[3] >> 5) & 0x1;
tr->q_scale_type = (bs->p_c[3] >> 4) & 0x1;
tr->intra_vlc_format = (bs->p_c[3] >> 3) & 0x1;
/* tr->alternate_scan = (bs->p_c[3] >> 2) & 0x1; */
memcpy(bs->p_w, bs->p_c, 5);
bs->p_c += 5;
bs->p_w += 5;
}
else
{
*bs->p_w++ = *bs->p_c++;
}
}
else if (ID == 0xB8) // gop header
{
memcpy(bs->p_w, bs->p_c, 4);
bs->p_c += 4;
bs->p_w += 4;
}
else if ((ID >= 0x01) && (ID <= 0xAF)) // slice
{
uint8_t *outTemp = bs->p_w, *inTemp = bs->p_c;
#if 0
if( ( tr->picture_coding_type == B_TYPE && tr->quant_corr < 2.5f ) || // don't recompress if we're in advance!
( tr->picture_coding_type == P_TYPE && tr->quant_corr < -2.5f ) ||
( tr->picture_coding_type == I_TYPE && tr->quant_corr < -5.0f ) )
#else
if( ( tr->picture_coding_type == B_TYPE ) ||
( tr->picture_coding_type == P_TYPE && tr->level_p ) ||
( tr->picture_coding_type == I_TYPE && tr->level_i ) )
#endif
{
if( !tr->horizontal_size_value || !tr->vertical_size_value )
{
return -1;
}
// init bit buffer
bs->i_bit_in_cache = 0; bs->i_bit_in = 0;
bs->i_bit_out_cache = 0; bs->i_bit_out = BITS_IN_BUF;
// get 32 bits
bs_refill( bs );
bs_refill( bs );
bs_refill( bs );
bs_refill( bs );
// begin bit level recoding
mpeg2_slice(tr, ID);
bs_flush_read( bs );
bs_flush_write( bs );
// end bit level recoding
/* Basic sanity checks --Meuuh */
if (bs->p_c > bs->p_r || bs->p_w > bs->p_rw)
{
return -1;
}
/*LOGF("type: %s code: %02i in : %6i out : %6i diff : %6i fact: %2.2f\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
ID, bs->p_c - inTemp, bs->p_w - outTemp, (bs->p_w - outTemp) - (bs->p_c - inTemp), (float)(bs->p_c - inTemp) / (float)(bs->p_w - outTemp));*/
if (bs->p_w - outTemp > bs->p_c - inTemp) // yes that might happen, rarely
{
/*LOGF("*** slice bigger than before !! (type: %s code: %i in : %i out : %i diff : %i)\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
ID, bs->p_c - inTemp, bs->p_w - outTemp, (bs->p_w - outTemp) - (bs->p_c - inTemp));*/
// in this case, we'll just use the original slice !
memcpy(outTemp, inTemp, bs->p_c - inTemp);
bs->p_w = outTemp + (bs->p_c - inTemp);
// adjust bs->i_byte_out
bs->i_byte_out -= (bs->p_w - outTemp) - (bs->p_c - inTemp);
}
}
}
return 0;
}
void E_(process_frame)( sout_stream_t *p_stream,
sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out )
{
transrate_t *tr = &id->tr;
bs_transrate_t *bs = &tr->bs;
sout_buffer_t *p_out;
double next_fact_x = 1.0;
/* The output buffer can't be bigger than the input buffer. */
p_out = sout_BufferNew( p_stream->p_sout, in->i_size );
p_out->i_length = in->i_length;
p_out->i_dts = in->i_dts;
p_out->i_pts = in->i_pts;
p_out->i_flags = in->i_flags;
sout_BufferChain( out, p_out );
bs->p_rw = bs->p_ow = bs->p_w = p_out->p_buffer;
bs->p_c = bs->p_r = in->p_buffer;
bs->p_r += in->i_size + 4;
bs->p_rw += in->i_size;
*(in->p_buffer + in->i_size) = 0;
*(in->p_buffer + in->i_size + 1) = 0;
*(in->p_buffer + in->i_size + 2) = 1;
*(in->p_buffer + in->i_size + 3) = 0;
/* Calculate how late we are */
tr->quant_corr = 0.0 + B_HANDICAP;
tr->level_i = 0;
tr->level_p = 0;
bs->i_byte_in = in->i_size;
bs->i_byte_out = 0;
if (tr->i_current_gop_size - in->i_size > 100)
{
if (tr->i_wanted_gop_size == in->i_size)
{
next_fact_x = 1.0;
}
else if ( tr->i_wanted_gop_size < in->i_size )
{
/* We're really late */
next_fact_x = 10.0;
}
else
{
next_fact_x = ((double)(tr->i_current_gop_size - in->i_size)) /
(tr->i_wanted_gop_size - in->i_size);
}
if (next_fact_x > QUANT_I)
{
tr->level_i = 1;
}
if (next_fact_x > QUANT_P)
{
tr->level_p = 1 + (next_fact_x - QUANT_P) / (QUANT_P_INC);
}
}
if ( tr->i_wanted_gop_size < 0 )
{
/* We're really late */
tr->current_fact_x = 3.0;
}
else
{
tr->current_fact_x = ((double)(tr->i_current_gop_size) /
(tr->i_wanted_gop_size));
}
for ( ; ; )
{
uint8_t *p_end = &in->p_buffer[in->i_size];
/* Search next start code */
for( ;; )
{
if( bs->p_c < p_end - 3 && bs->p_c[0] == 0 && bs->p_c[1] == 0 && bs->p_c[2] == 1 )
{
/* Next start code */
break;
}
else if( bs->p_c < p_end - 6 &&
bs->p_c[0] == 0 && bs->p_c[1] == 0 && bs->p_c[2] == 0 &&
bs->p_c[3] == 0 && bs->p_c[4] == 0 && bs->p_c[5] == 0 )
{
/* remove stuffing (looking for 6 0x00 bytes) */
bs->p_c++;
}
else
{
/* Copy */
*bs->p_w++ = *bs->p_c++;
}
if( bs->p_c >= p_end)
{
break;
}
}
if( bs->p_c >= p_end )
{
break;
}
/* Copy the start code */
memcpy(bs->p_w, bs->p_c, 3 );
bs->p_c += 3;
bs->p_w += 3;
if (do_next_start_code( tr ) )
{
/* Error */
break;
}
tr->quant_corr = (((bs->i_byte_in - (bs->p_r - 4 - bs->p_c)) / tr->fact_x) - (bs->i_byte_out + (bs->p_w - bs->p_ow))) / REACT_DELAY + B_HANDICAP;
}
bs->i_byte_out += bs->p_w - bs->p_ow;
p_out->i_size = bs->p_w - bs->p_ow;
tr->i_current_gop_size -= in->i_size;
tr->i_wanted_gop_size -= p_out->i_size;
tr->i_new_gop_size += bs->i_byte_out;
#if 0
msg_Dbg( p_stream, "%d: %d -> %d (r: %f, n:%f, corr:%f)",
tr->picture_coding_type, in->i_size, p_out->i_size,
(float)in->i_size / p_out->i_size,
next_fact_x, tr->quant_corr);
#endif
}
modules/stream_out/transrate/transrate.c
View file @ 7a649fb2
......@@ -2,17 +2,10 @@
* transrate.c: MPEG2 video transrating module
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* Copyright (C) 2003 Freebox S.A.
* Copyright (C) 2003 Antoine Missout
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
* $Id: transrate.c,v 1.6 2004/01/25 14:34:25 gbazin Exp $
* $Id: transrate.c,v 1.7 2004/03/03 11:20:52 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
* Antoine Missout
* Michel Lespinasse <walken@zoy.org>
* Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -42,6 +35,8 @@
#include <vlc/sout.h>
#include <vlc/input.h>
#include "transrate.h"
/*****************************************************************************
* Exported prototypes
*****************************************************************************/
......@@ -54,6 +49,9 @@ static int Send( sout_stream_t *, sout_stream_id_t *, sout_buffer_
static int transrate_video_process( sout_stream_t *, sout_stream_id_t *, sout_buffer_t *, sout_buffer_t ** );
void E_(process_frame)( sout_stream_t *p_stream,
sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
......@@ -69,6 +67,7 @@ struct sout_stream_sys_t
sout_stream_t *p_out;
int i_vbitrate;
mtime_t i_shaping_delay;
mtime_t i_first_frame;
mtime_t i_dts, i_pts;
......@@ -100,10 +99,24 @@ static int Open( vlc_object_t *p_this )
{
p_sys->i_vbitrate = 3000000;
}
p_sys->i_shaping_delay = 500000;
if( ( val = sout_cfg_find_value( p_stream->p_cfg, "shaping" ) ) )
{
p_sys->i_shaping_delay = (int64_t)atoi( val ) * 1000;
if( p_sys->i_shaping_delay <= 0 )
{
msg_Err( p_stream,
"invalid shaping ("I64Fd"ms) reseting to 500ms",
p_sys->i_shaping_delay / 1000 );
p_sys->i_shaping_delay = 500000;
}
}
p_sys->i_first_frame = 0;
msg_Dbg( p_stream, "codec video %dkb/s",
p_sys->i_vbitrate / 1024 );
msg_Dbg( p_stream, "codec video %dkb/s max gop="I64Fd"us",
p_sys->i_vbitrate / 1024, p_sys->i_shaping_delay );
if( !p_sys->p_out )
{
......@@ -135,86 +148,6 @@ static void Close( vlc_object_t * p_this )
}
/*****************************************************************************
* sout_stream_id_t:
*****************************************************************************/
typedef struct
{
uint8_t run;
short level;
} RunLevel;
typedef struct
{
uint8_t *p_c;
uint8_t *p_r;
uint8_t *p_w;
uint8_t *p_ow;
uint8_t *p_rw;
int i_bit_in;
int i_bit_out;
uint32_t i_bit_in_cache;
uint32_t i_bit_out_cache;
uint32_t i_byte_in;
uint32_t i_byte_out;
} bs_transrate_t;
typedef struct
{
bs_transrate_t bs;
/* MPEG2 state */
// seq header
unsigned int horizontal_size_value;
unsigned int vertical_size_value;
// pic header
unsigned int picture_coding_type;
// pic code ext
unsigned int f_code[2][2];
/* unsigned int intra_dc_precision; */
unsigned int picture_structure;
unsigned int frame_pred_frame_dct;
unsigned int concealment_motion_vectors;
unsigned int q_scale_type;
unsigned int intra_vlc_format;
/* unsigned int alternate_scan; */
// slice or mb
// quantizer_scale_code
unsigned int quantizer_scale;
unsigned int new_quantizer_scale;
unsigned int last_coded_scale;
int h_offset, v_offset;
// mb
double quant_corr, fact_x, current_fact_x;
int level_i, level_p;
ssize_t i_current_gop_size, i_wanted_gop_size, i_new_gop_size;
} transrate_t;
struct sout_stream_id_t
{
void *id;
vlc_bool_t b_transrate;
sout_buffer_t *p_current_buffer;
sout_buffer_t *p_next_gop;
mtime_t i_next_gop_duration;
size_t i_next_gop_size;
transrate_t tr;
};
static sout_stream_id_t * Add( sout_stream_t *p_stream, es_format_t *p_fmt )
{
sout_stream_sys_t *p_sys = p_stream->p_sys;
......@@ -298,1848 +231,85 @@ static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
}
}
/****************************************************************************
* transrater, code from M2VRequantizer http://www.metakine.com/
****************************************************************************/
/* This is awful magic --Meuuh */
//#define REACT_DELAY (1024.0*128.0)
#define REACT_DELAY (256.0)
#define QUANT_I (1.7)
#define QUANT_P (1.4)
#define QUANT_P_INC (0.1)
#define B_HANDICAP 5
// notes:
//
// - intra block:
// - the quantiser is increment by one step
//
// - non intra block:
// - in P_FRAME we keep the original quantiser but drop the last coefficient
// if there is more than one
// - in B_FRAME we multiply the quantiser by a factor
//
// - I_FRAME is recoded when we're 5.0 * REACT_DELAY late
// - P_FRAME is recoded when we're 2.5 * REACT_DELAY late
// - B_FRAME are always recoded
// if we're getting *very* late (60 * REACT_DELAY)
//
// - intra blocks quantiser is incremented two step
// - drop a few coefficients but always keep the first one
// useful constants
enum
{
I_TYPE = 1,
P_TYPE = 2,
B_TYPE = 3
};
// gcc
#ifdef HAVE_BUILTIN_EXPECT
#define likely(x) __builtin_expect ((x) != 0, 1)
#define unlikely(x) __builtin_expect ((x) != 0, 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
#define BITS_IN_BUF (8)
#define LOG(msg) fprintf (stderr, msg)
#define LOGF(format, args...) fprintf (stderr, format, args)
static inline void bs_write( bs_transrate_t *s, unsigned int val, int n)
{
assert(n < 32);
assert(!(val & (0xffffffffU << n)));
while (unlikely(n >= s->i_bit_out))
{
s->p_w[0] = (s->i_bit_out_cache << s->i_bit_out ) | (val >> (n - s->i_bit_out));
s->p_w++;
n -= s->i_bit_out;
s->i_bit_out_cache = 0;
val &= ~(0xffffffffU << n);
s->i_bit_out = BITS_IN_BUF;
}
if (likely(n))
{
s->i_bit_out_cache = (s->i_bit_out_cache << n) | val;
s->i_bit_out -= n;
}
assert(s->i_bit_out > 0);
assert(s->i_bit_out <= BITS_IN_BUF);
}
static inline void bs_refill( bs_transrate_t *s )
{
assert((s->p_r - s->p_c) >= 1);
s->i_bit_in_cache |= s->p_c[0] << (24 - s->i_bit_in);
s->i_bit_in += 8;
s->p_c++;
}
static inline void bs_flush( bs_transrate_t *s, unsigned int n )
{
assert(s->i_bit_in >= n);
s->i_bit_in_cache <<= n;
s->i_bit_in -= n;
assert( (!n) || ((n>0) && !(s->i_bit_in_cache & 0x1)) );
while (unlikely(s->i_bit_in < 24)) bs_refill( s );
}
static inline unsigned int bs_read( bs_transrate_t *s, unsigned int n)
{
unsigned int Val = ((unsigned int)s->i_bit_in_cache) >> (32 - n);
bs_flush( s, n );
return Val;
}
static inline unsigned int bs_copy( bs_transrate_t *s, unsigned int n)
{
unsigned int Val = bs_read( s, n);
bs_write(s, Val, n);
return Val;
}
static inline void bs_flush_read( bs_transrate_t *s )
{
int i = s->i_bit_in & 0x7;
if( i )
{
assert(((unsigned int)bs->i_bit_in_cache) >> (32 - i) == 0);
s->i_bit_in_cache <<= i;
s->i_bit_in -= i;
}
s->p_c += -1 * (s->i_bit_in >> 3);
s->i_bit_in = 0;
}
static inline void bs_flush_write( bs_transrate_t *s )
{
if( s->i_bit_out != 8 ) bs_write(s, 0, s->i_bit_out);
}
/////---- begin ext mpeg code
const uint8_t non_linear_mquant_table[32] =
{
0, 1, 2, 3, 4, 5, 6, 7,
8,10,12,14,16,18,20,22,
24,28,32,36,40,44,48,52,
56,64,72,80,88,96,104,112
};
const uint8_t map_non_linear_mquant[113] =
{
0,1,2,3,4,5,6,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,
16,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21,21,21,22,22,
22,22,23,23,23,23,24,24,24,24,24,24,24,25,25,25,25,25,25,25,26,26,
26,26,26,26,26,26,27,27,27,27,27,27,27,27,28,28,28,28,28,28,28,29,
29,29,29,29,29,29,29,29,29,30,30,30,30,30,30,30,31,31,31,31,31
};
static int scale_quant( unsigned int q_scale_type, double quant )
{
int iquant;
if (q_scale_type)
{
iquant = (int) floor(quant+0.5);
/* clip mquant to legal (linear) range */
if (iquant<1) iquant = 1;
if (iquant>112) iquant = 112;
iquant = non_linear_mquant_table[map_non_linear_mquant[iquant]];
}
else
{
/* clip mquant to legal (linear) range */
iquant = (int)floor(quant+0.5);
if (iquant<2) iquant = 2;
if (iquant>62) iquant = 62;
iquant = (iquant/2)*2; // Must be *even*
}
return iquant;
}
static int increment_quant( transrate_t *tr, int quant )
{
if( tr->q_scale_type )
{
assert(quant >= 1 && quant <= 112 );
quant = map_non_linear_mquant[quant] + 1;
if( tr->picture_coding_type == P_TYPE )
quant += tr->level_p;
if( quant > 31) quant = 31;
quant = non_linear_mquant_table[quant];
}
else
{
assert(!(quant & 1));
quant += 2;
if( tr->picture_coding_type == P_TYPE )
quant += 2 * tr->level_p;
if (quant > 62) quant = 62;
}
return quant;
}
static inline int intmax( register int x, register int y )
{
return x < y ? y : x;
}
static inline int intmin( register int x, register int y )
{
return x < y ? x : y;
}
static int getNewQuant( transrate_t *tr, int curQuant)
{
bs_transrate_t *bs = &tr->bs;
double calc_quant, quant_to_use;
int mquant = 0;
switch ( tr->picture_coding_type )
{
case I_TYPE:
case P_TYPE:
mquant = increment_quant( tr, curQuant );
break;
case B_TYPE:
tr->quant_corr = (((bs->i_byte_in - (bs->p_r - 4 - bs->p_c)) / tr->fact_x) - (bs->i_byte_out + (bs->p_w - bs->p_ow))) / REACT_DELAY + B_HANDICAP;
calc_quant = curQuant * tr->current_fact_x;
quant_to_use = calc_quant - tr->quant_corr;
mquant = intmax(scale_quant( tr->q_scale_type, quant_to_use), increment_quant( tr, curQuant) );
break;
default:
assert(0);
break;
}
/*
LOGF("type: %s orig_quant: %3i calc_quant: %7.1f quant_corr: %7.1f using_quant: %3i\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
(int)curQuant, (float)calc_quant, (float)quant_corr, (int)mquant);
*/
assert(mquant >= curQuant);
return mquant;
}
static inline int isNotEmpty(RunLevel *blk)
{
return (blk->level);
}
#include "putvlc.h"
static void putAC( bs_transrate_t *bs, int run, int signed_level, int vlcformat)
{
int level, len;
const VLCtable *ptab = NULL;
level = (signed_level<0) ? -signed_level : signed_level; /* abs(signed_level) */
assert(!(run<0 || run>63 || level==0 || level>2047));
len = 0;
if (run<2 && level<41)
{
if (vlcformat) ptab = &dct_code_tab1a[run][level-1];
else ptab = &dct_code_tab1[run][level-1];
len = ptab->len;
}
else if (run<32 && level<6)
{
if (vlcformat) ptab = &dct_code_tab2a[run-2][level-1];
else ptab = &dct_code_tab2[run-2][level-1];
len = ptab->len;
}
if (len) /* a VLC code exists */
{
bs_write( bs, ptab->code, len);
bs_write( bs, signed_level<0, 1); /* sign */
}
else
{
bs_write( bs, 1l, 6); /* Escape */
bs_write( bs, run, 6); /* 6 bit code for run */
bs_write( bs, ((unsigned int)signed_level) & 0xFFF, 12);
}
}
static inline void putACfirst( bs_transrate_t *bs, int run, int val)
{
if (run==0 && (val==1 || val==-1)) bs_write( bs, 2|(val<0),2);
else putAC( bs, run,val,0);
}
static void putnonintrablk( bs_transrate_t *bs, RunLevel *blk)
{
assert(blk->level);
putACfirst( bs, blk->run, blk->level);
blk++;
while(blk->level)
{
putAC( bs, blk->run, blk->level, 0);
blk++;
}
bs_write( bs, 2,2);
}
#include "getvlc.h"
static const int non_linear_quantizer_scale [] =
{
0, 1, 2, 3, 4, 5, 6, 7,
8, 10, 12, 14, 16, 18, 20, 22,
24, 28, 32, 36, 40, 44, 48, 52,
56, 64, 72, 80, 88, 96, 104, 112
};
static inline int get_macroblock_modes( transrate_t *tr )
static int transrate_video_process( sout_stream_t *p_stream,
sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out )
{
transrate_t *tr = &id->tr;
bs_transrate_t *bs = &tr->bs;
int macroblock_modes;
const MBtab * tab;
switch( tr->picture_coding_type)
{
case I_TYPE:
tab = MB_I + UBITS (bs->i_bit_in_cache, 1);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
*out = NULL;
if ((! ( tr->frame_pred_frame_dct)) && ( tr->picture_structure == FRAME_PICTURE))
while ( in != NULL )
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
sout_buffer_t * p_next = in->p_next;
int i_flags = in->i_flags;
case P_TYPE:
tab = MB_P + UBITS (bs->i_bit_in_cache, 5);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
in->p_next = NULL;
sout_BufferChain( &id->p_next_gop, in );
id->i_next_gop_duration += in->i_length;
id->i_next_gop_size += in->i_size;
in = p_next;
if (tr->picture_structure != FRAME_PICTURE)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
return macroblock_modes;
}
else if (tr->frame_pred_frame_dct)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
macroblock_modes |= MC_FRAME;
return macroblock_modes;
}
else
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
if( ((i_flags & (BLOCK_FLAG_TYPE_I << SOUT_BUFFER_FLAGS_BLOCK_SHIFT))
&& id->i_next_gop_duration >= 300000)
|| (id->i_next_gop_duration > p_stream->p_sys->i_shaping_delay) )
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
}
case B_TYPE:
tab = MB_B + UBITS (bs->i_bit_in_cache, 6);
bs_flush( bs, tab->len );
macroblock_modes = tab->modes;
mtime_t i_bitrate = (mtime_t)id->i_next_gop_size * 8000
/ (id->i_next_gop_duration / 1000);
mtime_t i_new_bitrate;
if( tr->picture_structure != FRAME_PICTURE)
{
if (! (macroblock_modes & MACROBLOCK_INTRA))
{
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
}
return macroblock_modes;
}
else if (tr->frame_pred_frame_dct)
if ( i_bitrate > p_stream->p_sys->i_vbitrate )
{
/* if (! (macroblock_modes & MACROBLOCK_INTRA)) */
macroblock_modes |= MC_FRAME;
return macroblock_modes;
tr->fact_x = (double)i_bitrate / p_stream->p_sys->i_vbitrate;
}
else
{
if (macroblock_modes & MACROBLOCK_INTRA) goto intra;
macroblock_modes |= UBITS (bs->i_bit_in_cache, 2) * MOTION_TYPE_BASE;
bs_flush( bs, 2 );
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
{
intra:
macroblock_modes |= UBITS (bs->i_bit_in_cache, 1) * DCT_TYPE_INTERLACED;
bs_flush( bs, 1 );
}
return macroblock_modes;
}
default:
return 0;
tr->fact_x = 1.0;
}
id->tr.i_current_gop_size = id->i_next_gop_size;
id->tr.i_wanted_gop_size = (p_stream->p_sys->i_vbitrate)
* (id->i_next_gop_duration / 1000) / 8000;
id->tr.i_new_gop_size = 0;
}
static inline int get_quantizer_scale( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
int quantizer_scale_code;
quantizer_scale_code = UBITS (bs->i_bit_in_cache, 5);
bs_flush( bs, 5 );
if( tr->q_scale_type )
return non_linear_quantizer_scale[quantizer_scale_code];
else
return quantizer_scale_code << 1;
}
static inline int get_motion_delta( bs_transrate_t *bs, const int f_code )
{
int delta;
int sign;
const MVtab * tab;
id->p_current_buffer = id->p_next_gop;
if (bs->i_bit_in_cache & 0x80000000)
while ( id->p_current_buffer != NULL )
{
bs_copy( bs, 1 );
return 0;
}
else if (bs->i_bit_in_cache >= 0x0c000000)
sout_buffer_t * p_next = id->p_current_buffer->p_next;
if ( tr->fact_x == 1.0 )
{
tab = MV_4 + UBITS (bs->i_bit_in_cache, 4);
delta = (tab->delta << f_code) + 1;
bs_copy( bs, tab->len);
sign = SBITS (bs->i_bit_in_cache, 1);
bs_copy( bs, 1 );
if (f_code) delta += UBITS (bs->i_bit_in_cache, f_code);
bs_copy( bs, f_code);
return (delta ^ sign) - sign;
bs->i_byte_out += id->p_current_buffer->i_size;
id->p_current_buffer->p_next = NULL;
sout_BufferChain( out, id->p_current_buffer );
}
else
{
tab = MV_10 + UBITS (bs->i_bit_in_cache, 10);
delta = (tab->delta << f_code) + 1;
bs_copy( bs, tab->len);
sign = SBITS (bs->i_bit_in_cache, 1);
bs_copy( bs, 1);
if (f_code)
{
delta += UBITS (bs->i_bit_in_cache, f_code);
bs_copy( bs, f_code);
E_(process_frame)( p_stream, id, id->p_current_buffer, out );
sout_BufferDelete(p_stream->p_sout, id->p_current_buffer);
}
return (delta ^ sign) - sign;
id->p_current_buffer = p_next;
}
}
static inline int get_dmv( bs_transrate_t *bs )
{
const DMVtab * tab;
tab = DMV_2 + UBITS (bs->i_bit_in_cache, 2);
bs_copy( bs, tab->len);
return tab->dmv;
}
static inline int get_coded_block_pattern( bs_transrate_t *bs )
{
const CBPtab * tab;
if (bs->i_bit_in_cache >= 0x20000000)
if ( tr->fact_x != 1.0 )
{
tab = CBP_7 + (UBITS (bs->i_bit_in_cache, 7) - 16);
bs_flush( bs, tab->len );
return tab->cbp;
}
i_new_bitrate = (mtime_t)tr->i_new_gop_size * 8000
/ (id->i_next_gop_duration / 1001);
if (i_new_bitrate > p_stream->p_sys->i_vbitrate + 300000)
msg_Err(p_stream, "%lld -> %lld (%f, r:%f) d=%lld",
i_bitrate, i_new_bitrate, tr->fact_x,
(float)i_bitrate / i_new_bitrate,
id->i_next_gop_duration);
else
{
tab = CBP_9 + UBITS (bs->i_bit_in_cache, 9);
bs_flush( bs, tab->len );
return tab->cbp;
msg_Dbg(p_stream, "%lld -> %lld (%f, r:%f) d=%lld",
i_bitrate, i_new_bitrate, tr->fact_x,
(float)i_bitrate / i_new_bitrate,
id->i_next_gop_duration);
}
}
static inline int get_luma_dc_dct_diff( bs_transrate_t *bs )
{
const DCtab * tab;
int size;
int dc_diff;
if (bs->i_bit_in_cache < 0xf8000000)
{
tab = DC_lum_5 + UBITS (bs->i_bit_in_cache, 5);
size = tab->size;
if (size)
{
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
id->p_next_gop = NULL;
id->i_next_gop_duration = 0;
id->i_next_gop_size = 0;
}
else
{
bs_copy( bs, 3);
return 0;
}
}
else
{
tab = DC_long + (UBITS (bs->i_bit_in_cache, 9) - 0x1e0);
size = tab->size;
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
}
}
static inline int get_chroma_dc_dct_diff( bs_transrate_t *bs )
{
const DCtab * tab;
int size;
int dc_diff;
if (bs->i_bit_in_cache < 0xf8000000)
{
tab = DC_chrom_5 + UBITS (bs->i_bit_in_cache, 5);
size = tab->size;
if (size)
{
bs_copy( bs, tab->len);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
} else
{
bs_copy( bs, 2);
return 0;
}
}
else
{
tab = DC_long + (UBITS (bs->i_bit_in_cache, 10) - 0x3e0);
size = tab->size;
bs_copy( bs, tab->len + 1);
//dc_diff = UBITS (bs->i_bit_in_cache, size) - UBITS (SBITS (~bs->i_bit_in_cache, 1), size);
dc_diff = UBITS (bs->i_bit_in_cache, size);
if (!(dc_diff >> (size - 1))) dc_diff = (dc_diff + 1) - (1 << size);
bs_copy( bs, size);
return dc_diff;
}
}
static void get_intra_block_B14( bs_transrate_t *bs, const int i_qscale, const int i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
i += tab->run;
if (i >= 64) break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 0);
li = i;
}
bs_flush( bs, 1 );
continue;
}
else if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 0);
li = i;
}
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64 ) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64 ) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_copy( bs, 2); /* end of block code */
}
static void get_intra_block_B15( bs_transrate_t *bs, const int i_qscale, int const i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B15_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64)
{
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 1);
li = i;
}
bs_flush( bs, 1 );
continue;
}
else
{
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check against buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
putAC( bs, i - li - 1, (val * i_qscale) / i_qscale_new, 1);
li = i;
}
bs_flush( bs, 12 );
continue;
}
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B15_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_copy( bs, 4); /* end of block code */
}
static int get_non_intra_block_drop( transrate_t *tr, RunLevel *blk)
{
bs_transrate_t *bs = &tr->bs;
int i, li;
int val;
const DCTtab * tab;
RunLevel *sblk = blk + 1;
li = i = -1;
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14DC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
goto entry_1;
}
else goto entry_2;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
entry_1:
i += tab->run;
if (i >= 64) break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1); /* if (bitstream_get (1)) val = -val; */
blk->level = val;
blk->run = i - li - 1;
li = i;
blk++;
bs_flush( bs, 1 );
continue;
}
entry_2:
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
blk->level = val;
blk->run = i - li - 1;
li = i;
blk++;
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_flush( bs, 2 ); /* dump end of block code */
// remove last coeff
if (blk != sblk)
{
blk--;
}
// remove more coeffs if very late
if (tr->level_p >= 4 && (blk != sblk))
{
blk--;
if (tr->level_p >= 5 && (blk != sblk))
{
blk--;
if (tr->level_p >= 6 && (blk != sblk))
{
blk--;
if (tr->level_p >= 7 && (blk != sblk))
blk--;
}
}
}
blk->level = 0;
return i;
}
static int get_non_intra_block_rq( bs_transrate_t *bs, RunLevel *blk, const int i_qscale, const int i_qscale_new )
{
int tst;
int i, li;
int val;
const DCTtab * tab;
/* Basic sanity check --Meuuh */
if( i_qscale == 0 )
{
return 0;
}
tst = i_qscale_new/i_qscale + ((i_qscale_new%i_qscale) ? 1 : 0);
li = i = -1;
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14DC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
goto entry_1;
}
else goto entry_2;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x28000000)
{
tab = DCT_B14AC_5 + (UBITS (bs->i_bit_in_cache, 5) - 5);
entry_1:
i += tab->run;
if (i >= 64)
break; /* end of block */
normal_code:
bs_flush( bs, tab->len );
val = tab->level;
if (val >= tst)
{
val = (val ^ SBITS (bs->i_bit_in_cache, 1)) - SBITS (bs->i_bit_in_cache, 1);
blk->level = (val * i_qscale) / i_qscale_new;
blk->run = i - li - 1;
li = i;
blk++;
}
//if ( ((val) && (tab->level < tst)) || ((!val) && (tab->level >= tst)) )
// LOGF("level: %i val: %i tst : %i q: %i nq : %i\n", tab->level, val, tst, q, nq);
bs_flush( bs, 1 );
continue;
}
entry_2:
if (bs->i_bit_in_cache >= 0x04000000)
{
tab = DCT_B14_8 + (UBITS (bs->i_bit_in_cache, 8) - 4);
i += tab->run;
if (i < 64) goto normal_code;
/* escape code */
i += (UBITS (bs->i_bit_in_cache, 12) & 0x3F) - 64;
if (i >= 64) break; /* illegal, check needed to avoid buffer overflow */
bs_flush( bs, 12 );
val = SBITS (bs->i_bit_in_cache, 12);
if (abs(val) >= tst)
{
blk->level = (val * i_qscale) / i_qscale_new;
blk->run = i - li - 1;
li = i;
blk++;
}
bs_flush( bs, 12 );
continue;
}
else if (bs->i_bit_in_cache >= 0x02000000)
{
tab = DCT_B14_10 + (UBITS (bs->i_bit_in_cache, 10) - 8);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00800000)
{
tab = DCT_13 + (UBITS (bs->i_bit_in_cache, 13) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else if (bs->i_bit_in_cache >= 0x00200000)
{
tab = DCT_15 + (UBITS (bs->i_bit_in_cache, 15) - 16);
i += tab->run;
if (i < 64) goto normal_code;
}
else
{
tab = DCT_16 + UBITS (bs->i_bit_in_cache, 16);
bs_flush( bs, 16 );
i += tab->run;
if (i < 64) goto normal_code;
}
break; /* illegal, check needed to avoid buffer overflow */
}
bs_flush( bs, 2 ); /* dump end of block code */
blk->level = 0;
return i;
}
static void motion_fr_frame( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0] );
get_motion_delta( bs, f_code[1] );
}
static void motion_fr_field( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fr_dmv( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0]);
get_dmv( bs );
get_motion_delta( bs, f_code[1]);
get_dmv( bs );
}
static void motion_fi_field( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fi_16x8( bs_transrate_t *bs, unsigned int f_code[2] )
{
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
bs_copy( bs, 1);
get_motion_delta( bs, f_code[0]);
get_motion_delta( bs, f_code[1]);
}
static void motion_fi_dmv( bs_transrate_t *bs, unsigned int f_code[2] )
{
get_motion_delta( bs, f_code[0]);
get_dmv( bs );
get_motion_delta( bs, f_code[1]);
get_dmv( bs );
}
#define MOTION_CALL(routine,direction) \
do { \
if ((direction) & MACROBLOCK_MOTION_FORWARD) \
routine( bs, tr->f_code[0]); \
if ((direction) & MACROBLOCK_MOTION_BACKWARD) \
routine( bs, tr->f_code[1]); \
} while (0)
#define NEXT_MACROBLOCK \
do { \
tr->h_offset += 16; \
if( tr->h_offset == tr->horizontal_size_value) \
{ \
tr->v_offset += 16; \
if (tr->v_offset > (tr->vertical_size_value - 16)) return; \
tr->h_offset = 0; \
} \
} while (0)
static void putmbdata( transrate_t *tr, int macroblock_modes )
{
bs_transrate_t *bs = &tr->bs;
bs_write( bs,
mbtypetab[tr->picture_coding_type-1][macroblock_modes&0x1F].code,
mbtypetab[tr->picture_coding_type-1][macroblock_modes&0x1F].len);
switch ( tr->picture_coding_type)
{
case I_TYPE:
if ((! (tr->frame_pred_frame_dct)) && (tr->picture_structure == FRAME_PICTURE))
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
break;
case P_TYPE:
if (tr->picture_structure != FRAME_PICTURE)
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
break;
}
else if (tr->frame_pred_frame_dct) break;
else
{
if (macroblock_modes & MACROBLOCK_MOTION_FORWARD)
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
break;
}
case B_TYPE:
if (tr->picture_structure != FRAME_PICTURE)
{
if (! (macroblock_modes & MACROBLOCK_INTRA))
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
break;
}
else if (tr->frame_pred_frame_dct) break;
else
{
if (macroblock_modes & MACROBLOCK_INTRA) goto intra;
bs_write( bs, (macroblock_modes & MOTION_TYPE_MASK) / MOTION_TYPE_BASE, 2);
if (macroblock_modes & (MACROBLOCK_INTRA | MACROBLOCK_PATTERN))
{
intra:
bs_write( bs, macroblock_modes & DCT_TYPE_INTERLACED ? 1 : 0, 1);
}
break;
}
}
}
static inline void put_quantiser( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
bs_write( bs, tr->q_scale_type ? map_non_linear_mquant[tr->new_quantizer_scale] : tr->new_quantizer_scale >> 1, 5);
tr->last_coded_scale = tr->new_quantizer_scale;
}
static int slice_init( transrate_t *tr, int code)
{
bs_transrate_t *bs = &tr->bs;
int offset;
const MBAtab * mba;
tr->v_offset = (code - 1) * 16;
tr->quantizer_scale = get_quantizer_scale( tr );
if ( tr->picture_coding_type == P_TYPE)
{
tr->new_quantizer_scale = tr->quantizer_scale;
}
else
{
tr->new_quantizer_scale = getNewQuant(tr, tr->quantizer_scale);
}
put_quantiser( tr );
/*LOGF("************************\nstart of slice %i in %s picture. ori quant: %i new quant: %i\n", code,
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
quantizer_scale, new_quantizer_scale);*/
/* ignore intra_slice and all the extra data */
while (bs->i_bit_in_cache & 0x80000000)
{
bs_flush( bs, 9 );
}
/* decode initial macroblock address increment */
offset = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x08000000)
{
mba = MBA_5 + (UBITS (bs->i_bit_in_cache, 6) - 2);
break;
}
else if (bs->i_bit_in_cache >= 0x01800000)
{
mba = MBA_11 + (UBITS (bs->i_bit_in_cache, 12) - 24);
break;
}
else if( UBITS (bs->i_bit_in_cache, 12 ) == 8 )
{
/* macroblock_escape */
offset += 33;
bs_copy( bs, 11);
}
else
{
return -1;
}
}
bs_copy( bs, mba->len + 1);
tr->h_offset = (offset + mba->mba) << 4;
while( tr->h_offset - (int)tr->horizontal_size_value >= 0)
{
tr->h_offset -= tr->horizontal_size_value;
tr->v_offset += 16;
}
if( tr->v_offset > tr->vertical_size_value - 16 )
{
return -1;
}
return 0;
}
static void mpeg2_slice( transrate_t *tr, const int code )
{
bs_transrate_t *bs = &tr->bs;
if( slice_init( tr, code ) )
{
return;
}
for( ;; )
{
int macroblock_modes;
int mba_inc;
const MBAtab * mba;
macroblock_modes = get_macroblock_modes( tr );
if (macroblock_modes & MACROBLOCK_QUANT) tr->quantizer_scale = get_quantizer_scale( tr );
//LOGF("blk %i : ", h_offset >> 4);
if (macroblock_modes & MACROBLOCK_INTRA)
{
//LOG("intra "); if (macroblock_modes & MACROBLOCK_QUANT) LOGF("got new quant: %i ", quantizer_scale);
tr->new_quantizer_scale = increment_quant( tr, tr->quantizer_scale);
if (tr->last_coded_scale == tr->new_quantizer_scale) macroblock_modes &= 0xFFFFFFEF; // remove MACROBLOCK_QUANT
else macroblock_modes |= MACROBLOCK_QUANT; //add MACROBLOCK_QUANT
putmbdata( tr, macroblock_modes);
if (macroblock_modes & MACROBLOCK_QUANT) put_quantiser( tr );
//if (macroblock_modes & MACROBLOCK_QUANT) LOGF("put new quant: %i ", new_quantizer_scale);
if (tr->concealment_motion_vectors)
{
if (tr->picture_structure != FRAME_PICTURE)
{
bs_copy( bs, 1); /* remove field_select */
}
/* like motion_frame, but parsing without actual motion compensation */
get_motion_delta( bs, tr->f_code[0][0]);
get_motion_delta( bs, tr->f_code[0][1]);
bs_copy( bs, 1); /* remove marker_bit */
}
if( tr->intra_vlc_format )
{
/* Luma */
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
/* Chroma */
get_chroma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_chroma_dc_dct_diff( bs ); get_intra_block_B15( bs, tr->quantizer_scale, tr->new_quantizer_scale );
}
else
{
/* Luma */
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_luma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
/* Chroma */
get_chroma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
get_chroma_dc_dct_diff( bs ); get_intra_block_B14( bs, tr->quantizer_scale, tr->new_quantizer_scale );
}
}
else
{
RunLevel block[6][65]; // terminated by level = 0, so we need 64+1
int new_coded_block_pattern = 0;
// begin saving data
int batb;
uint8_t p_n_ow[32], *p_n_w,
*p_o_ow = bs->p_ow, *p_o_w = bs->p_w;
uint32_t i_n_bit_out, i_n_bit_out_cache,
i_o_bit_out = bs->i_bit_out, i_o_bit_out_cache = bs->i_bit_out_cache;
bs->i_bit_out_cache = 0; bs->i_bit_out = BITS_IN_BUF;
bs->p_ow = bs->p_w = p_n_ow;
if (tr->picture_structure == FRAME_PICTURE)
switch (macroblock_modes & MOTION_TYPE_MASK)
{
case MC_FRAME: MOTION_CALL (motion_fr_frame, macroblock_modes); break;
case MC_FIELD: MOTION_CALL (motion_fr_field, macroblock_modes); break;
case MC_DMV: MOTION_CALL (motion_fr_dmv, MACROBLOCK_MOTION_FORWARD); break;
}
else
switch (macroblock_modes & MOTION_TYPE_MASK)
{
case MC_FIELD: MOTION_CALL (motion_fi_field, macroblock_modes); break;
case MC_16X8: MOTION_CALL (motion_fi_16x8, macroblock_modes); break;
case MC_DMV: MOTION_CALL (motion_fi_dmv, MACROBLOCK_MOTION_FORWARD); break;
}
assert(bs->p_w - bs->p_ow < 32);
p_n_w = bs->p_w;
i_n_bit_out = bs->i_bit_out;
i_n_bit_out_cache = bs->i_bit_out_cache;
assert(bs->p_ow == p_n_ow);
bs->i_bit_out = i_o_bit_out ;
bs->i_bit_out_cache = i_o_bit_out_cache;
bs->p_ow = p_o_ow;
bs->p_w = p_o_w;
// end saving data
if ( tr->picture_coding_type == P_TYPE) tr->new_quantizer_scale = tr->quantizer_scale;
else tr->new_quantizer_scale = getNewQuant( tr, tr->quantizer_scale);
//LOG("non intra "); if (macroblock_modes & MACROBLOCK_QUANT) LOGF("got new quant: %i ", quantizer_scale);
if (macroblock_modes & MACROBLOCK_PATTERN)
{
const int cbp = get_coded_block_pattern( bs );
if( tr->picture_coding_type == P_TYPE )
{
if( cbp&0x20 ) get_non_intra_block_drop( tr, block[0] );
if( cbp&0x10 ) get_non_intra_block_drop( tr, block[1] );
if( cbp&0x08 ) get_non_intra_block_drop( tr, block[2] );
if( cbp&0x04 ) get_non_intra_block_drop( tr, block[3] );
if( cbp&0x02 ) get_non_intra_block_drop( tr, block[4] );
if( cbp&0x01 ) get_non_intra_block_drop( tr, block[5] );
new_coded_block_pattern = cbp;
}
else
{
if( cbp&0x20 )
{
get_non_intra_block_rq( bs, block[0], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[0] ) ) new_coded_block_pattern |= 0x20;
}
if( cbp&0x10 )
{
get_non_intra_block_rq( bs, block[1], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[1] ) ) new_coded_block_pattern |= 0x10;
}
if( cbp&0x08 )
{
get_non_intra_block_rq( bs, block[2], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[2] ) ) new_coded_block_pattern |= 0x08;
}
if( cbp&0x04 )
{
get_non_intra_block_rq( bs, block[3], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[3] ) ) new_coded_block_pattern |= 0x04;
}
if( cbp&0x02 )
{
get_non_intra_block_rq( bs, block[4], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[4] ) ) new_coded_block_pattern |= 0x02;
}
if( cbp&0x01 )
{
get_non_intra_block_rq( bs, block[5], tr->quantizer_scale, tr->new_quantizer_scale );
if( isNotEmpty( block[5] ) ) new_coded_block_pattern |= 0x01;
}
if( !new_coded_block_pattern) macroblock_modes &= 0xFFFFFFED; // remove MACROBLOCK_PATTERN and MACROBLOCK_QUANT flag
}
}
if (tr->last_coded_scale == tr->new_quantizer_scale) macroblock_modes &= 0xFFFFFFEF; // remove MACROBLOCK_QUANT
else if (macroblock_modes & MACROBLOCK_PATTERN) macroblock_modes |= MACROBLOCK_QUANT; //add MACROBLOCK_QUANT
assert( (macroblock_modes & MACROBLOCK_PATTERN) || !(macroblock_modes & MACROBLOCK_QUANT) );
putmbdata( tr, macroblock_modes);
if( macroblock_modes & MACROBLOCK_QUANT )
{
put_quantiser( tr );
}
// put saved motion data...
for (batb = 0; batb < (p_n_w - p_n_ow); batb++)
{
bs_write( bs, p_n_ow[batb], 8 );
}
bs_write( bs, i_n_bit_out_cache, BITS_IN_BUF - i_n_bit_out);
// end saved motion data...
if (macroblock_modes & MACROBLOCK_PATTERN)
{
/* Write CBP */
bs_write( bs, cbptable[new_coded_block_pattern].code,cbptable[new_coded_block_pattern].len);
if (new_coded_block_pattern & 0x20) putnonintrablk( bs, block[0]);
if (new_coded_block_pattern & 0x10) putnonintrablk( bs, block[1]);
if (new_coded_block_pattern & 0x08) putnonintrablk( bs, block[2]);
if (new_coded_block_pattern & 0x04) putnonintrablk( bs, block[3]);
if (new_coded_block_pattern & 0x02) putnonintrablk( bs, block[4]);
if (new_coded_block_pattern & 0x01) putnonintrablk( bs, block[5]);
}
}
//LOGF("\n\to: %i c: %i n: %i\n", quantizer_scale, last_coded_scale, new_quantizer_scale);
NEXT_MACROBLOCK;
mba_inc = 0;
for( ;; )
{
if (bs->i_bit_in_cache >= 0x10000000)
{
mba = MBA_5 + (UBITS (bs->i_bit_in_cache, 5) - 2);
break;
}
else if (bs->i_bit_in_cache >= 0x03000000)
{
mba = MBA_11 + (UBITS (bs->i_bit_in_cache, 11) - 24);
break;
}
else if( UBITS (bs->i_bit_in_cache, 11 ) == 8 )
{
/* macroblock_escape */
mba_inc += 33;
bs_copy( bs, 11);
}
else
{
/* EOS or error */
return;
}
}
bs_copy( bs, mba->len);
mba_inc += mba->mba;
while( mba_inc-- )
{
NEXT_MACROBLOCK;
}
}
}
/////---- end ext mpeg code
static int do_next_start_code( transrate_t *tr )
{
bs_transrate_t *bs = &tr->bs;
uint8_t ID;
// get start code
ID = bs->p_c[0];
/* Copy one byte */
*bs->p_w++ = *bs->p_c++;
if (ID == 0x00) // pic header
{
tr->picture_coding_type = (bs->p_c[1] >> 3) & 0x7;
bs->p_c[1] |= 0x7; bs->p_c[2] = 0xFF; bs->p_c[3] |= 0xF8; // vbv_delay is now 0xFFFF
memcpy(bs->p_w, bs->p_c, 4);
bs->p_c += 4;
bs->p_w += 4;
}
else if (ID == 0xB3) // seq header
{
tr->horizontal_size_value = (bs->p_c[0] << 4) | (bs->p_c[1] >> 4);
tr->vertical_size_value = ((bs->p_c[1] & 0xF) << 8) | bs->p_c[2];
if(!tr->horizontal_size_value || !tr->vertical_size_value )
{
return -1;
}
memcpy(bs->p_w, bs->p_c, 8 );
bs->p_c += 8;
bs->p_w += 8;
}
else if (ID == 0xB5) // extension
{
if ((bs->p_c[0] >> 4) == 0x8) // pic coding ext
{
tr->f_code[0][0] = (bs->p_c[0] & 0xF) - 1;
tr->f_code[0][1] = (bs->p_c[1] >> 4) - 1;
tr->f_code[1][0] = (bs->p_c[1] & 0xF) - 1;
tr->f_code[1][1] = (bs->p_c[2] >> 4) - 1;
/* tr->intra_dc_precision = (bs->p_c[2] >> 2) & 0x3; */
tr->picture_structure = bs->p_c[2] & 0x3;
tr->frame_pred_frame_dct = (bs->p_c[3] >> 6) & 0x1;
tr->concealment_motion_vectors = (bs->p_c[3] >> 5) & 0x1;
tr->q_scale_type = (bs->p_c[3] >> 4) & 0x1;
tr->intra_vlc_format = (bs->p_c[3] >> 3) & 0x1;
/* tr->alternate_scan = (bs->p_c[3] >> 2) & 0x1; */
memcpy(bs->p_w, bs->p_c, 5);
bs->p_c += 5;
bs->p_w += 5;
}
else
{
*bs->p_w++ = *bs->p_c++;
}
}
else if (ID == 0xB8) // gop header
{
memcpy(bs->p_w, bs->p_c, 4);
bs->p_c += 4;
bs->p_w += 4;
}
else if ((ID >= 0x01) && (ID <= 0xAF)) // slice
{
uint8_t *outTemp = bs->p_w, *inTemp = bs->p_c;
#if 0
if( ( tr->picture_coding_type == B_TYPE && tr->quant_corr < 2.5f ) || // don't recompress if we're in advance!
( tr->picture_coding_type == P_TYPE && tr->quant_corr < -2.5f ) ||
( tr->picture_coding_type == I_TYPE && tr->quant_corr < -5.0f ) )
#else
if( ( tr->picture_coding_type == B_TYPE ) ||
( tr->picture_coding_type == P_TYPE && tr->level_p ) ||
( tr->picture_coding_type == I_TYPE && tr->level_i ) )
#endif
{
if( !tr->horizontal_size_value || !tr->vertical_size_value )
{
return -1;
}
// init bit buffer
bs->i_bit_in_cache = 0; bs->i_bit_in = 0;
bs->i_bit_out_cache = 0; bs->i_bit_out = BITS_IN_BUF;
// get 32 bits
bs_refill( bs );
bs_refill( bs );
bs_refill( bs );
bs_refill( bs );
// begin bit level recoding
mpeg2_slice(tr, ID);
bs_flush_read( bs );
bs_flush_write( bs );
// end bit level recoding
/* Basic sanity checks --Meuuh */
if (bs->p_c > bs->p_r || bs->p_w > bs->p_rw)
{
return -1;
}
/*LOGF("type: %s code: %02i in : %6i out : %6i diff : %6i fact: %2.2f\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
ID, bs->p_c - inTemp, bs->p_w - outTemp, (bs->p_w - outTemp) - (bs->p_c - inTemp), (float)(bs->p_c - inTemp) / (float)(bs->p_w - outTemp));*/
if (bs->p_w - outTemp > bs->p_c - inTemp) // yes that might happen, rarely
{
/*LOGF("*** slice bigger than before !! (type: %s code: %i in : %i out : %i diff : %i)\n",
(picture_coding_type == I_TYPE ? "I_TYPE" : (picture_coding_type == P_TYPE ? "P_TYPE" : "B_TYPE")),
ID, bs->p_c - inTemp, bs->p_w - outTemp, (bs->p_w - outTemp) - (bs->p_c - inTemp));*/
// in this case, we'll just use the original slice !
memcpy(outTemp, inTemp, bs->p_c - inTemp);
bs->p_w = outTemp + (bs->p_c - inTemp);
// adjust bs->i_byte_out
bs->i_byte_out -= (bs->p_w - outTemp) - (bs->p_c - inTemp);
}
}
}
return 0;
}
static void process_frame( sout_stream_t *p_stream,
sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out )
{
transrate_t *tr = &id->tr;
bs_transrate_t *bs = &tr->bs;
sout_buffer_t *p_out;
double next_fact_x = 1.0;
/* The output buffer can't be bigger than the input buffer. */
p_out = sout_BufferNew( p_stream->p_sout, in->i_size );
p_out->i_length = in->i_length;
p_out->i_dts = in->i_dts;
p_out->i_pts = in->i_pts;
sout_BufferChain( out, p_out );
bs->p_rw = bs->p_ow = bs->p_w = p_out->p_buffer;
bs->p_c = bs->p_r = in->p_buffer;
bs->p_r += in->i_size + 4;
bs->p_rw += in->i_size;
*(in->p_buffer + in->i_size) = 0;
*(in->p_buffer + in->i_size + 1) = 0;
*(in->p_buffer + in->i_size + 2) = 1;
*(in->p_buffer + in->i_size + 3) = 0;
/* Calculate how late we are */
tr->quant_corr = 0.0 + B_HANDICAP;
tr->level_i = 0;
tr->level_p = 0;
bs->i_byte_in = in->i_size;
bs->i_byte_out = 0;
if (tr->i_current_gop_size - in->i_size > 100)
{
if (tr->i_wanted_gop_size == in->i_size)
{
next_fact_x = 1.0;
}
else if ( tr->i_wanted_gop_size < in->i_size )
{
/* We're really late */
next_fact_x = 10.0;
}
else
{
next_fact_x = ((double)(tr->i_current_gop_size - in->i_size)) /
(tr->i_wanted_gop_size - in->i_size);
}
if (next_fact_x > QUANT_I)
{
tr->level_i = 1;
}
if (next_fact_x > QUANT_P)
{
tr->level_p = 1 + (next_fact_x - QUANT_P) / (QUANT_P_INC);
}
}
if ( tr->i_wanted_gop_size < 0 )
{
/* We're really late */
tr->current_fact_x = 3.0;
}
else
{
tr->current_fact_x = ((double)(tr->i_current_gop_size) /
(tr->i_wanted_gop_size));
}
for ( ; ; )
{
uint8_t *p_end = &in->p_buffer[in->i_size];
/* Search next start code */
for( ;; )
{
if( bs->p_c < p_end - 3 && bs->p_c[0] == 0 && bs->p_c[1] == 0 && bs->p_c[2] == 1 )
{
/* Next start code */
break;
}
else if( bs->p_c < p_end - 6 &&
bs->p_c[0] == 0 && bs->p_c[1] == 0 && bs->p_c[2] == 0 &&
bs->p_c[3] == 0 && bs->p_c[4] == 0 && bs->p_c[5] == 0 )
{
/* remove stuffing (looking for 6 0x00 bytes) */
bs->p_c++;
}
else
{
/* Copy */
*bs->p_w++ = *bs->p_c++;
}
if( bs->p_c >= p_end)
{
break;
}
}
if( bs->p_c >= p_end )
{
break;
}
/* Copy the start code */
memcpy(bs->p_w, bs->p_c, 3 );
bs->p_c += 3;
bs->p_w += 3;
if (do_next_start_code( tr ) )
{
/* Error */
break;
}
tr->quant_corr = (((bs->i_byte_in - (bs->p_r - 4 - bs->p_c)) / tr->fact_x) - (bs->i_byte_out + (bs->p_w - bs->p_ow))) / REACT_DELAY + B_HANDICAP;
}
bs->i_byte_out += bs->p_w - bs->p_ow;
p_out->i_size = bs->p_w - bs->p_ow;
tr->i_current_gop_size -= in->i_size;
tr->i_wanted_gop_size -= p_out->i_size;
tr->i_new_gop_size += bs->i_byte_out;
#if 0
msg_Dbg( p_stream, "%d: %d -> %d (r: %f, n:%f, corr:%f)",
tr->picture_coding_type, in->i_size, p_out->i_size,
(float)in->i_size / p_out->i_size,
next_fact_x, tr->quant_corr);
#endif
}
static int transrate_video_process( sout_stream_t *p_stream,
sout_stream_id_t *id, sout_buffer_t *in, sout_buffer_t **out )
{
transrate_t *tr = &id->tr;
bs_transrate_t *bs = &tr->bs;
vlc_bool_t b_gop = VLC_FALSE;
*out = NULL;
if( GetDWBE( in->p_buffer ) != 0x100 )
{
uint8_t *p = in->p_buffer;
uint8_t *p_end = &in->p_buffer[in->i_size];
uint32_t code = GetDWBE( p );
/* We may have a GOP */
while( p < p_end - 4 )
{
if( code == 0x1b8 )
{
b_gop = VLC_TRUE;
break;
}
else if( code == 0x100 )
{
break;
}
code = ( code << 8 )|p[4];
p++;
}
}
if( b_gop && id->i_next_gop_duration >= 300000 )
{
while ( id->p_current_buffer != NULL )
{
sout_buffer_t * p_next = id->p_current_buffer->p_next;
if ( tr->fact_x == 1.0 )
{
bs->i_byte_out += id->p_current_buffer->i_size;
id->p_current_buffer->p_next = NULL;
sout_BufferChain( out, id->p_current_buffer );
}
else
{
process_frame( p_stream, id, id->p_current_buffer, out );
sout_BufferDelete(p_stream->p_sout, id->p_current_buffer);
}
id->p_current_buffer = p_next;
}
if ( id->i_next_gop_duration )
{
mtime_t i_bitrate = (mtime_t)id->i_next_gop_size * 8000
/ (id->i_next_gop_duration / 1000);
static mtime_t i_old_bitrate = 0;
static mtime_t i_old_duration = 0;
if (i_old_bitrate && tr->fact_x != 1.0)
{
mtime_t i_new_bitrate = tr->i_new_gop_size * 8000 / (i_old_duration / 1000);
if (i_new_bitrate > p_stream->p_sys->i_vbitrate + 300000)
msg_Err(p_stream, "%lld -> %lld (%f, r:%f)",
i_old_bitrate, i_new_bitrate, tr->fact_x,
(float)i_old_bitrate / i_new_bitrate);
#if 0
else
msg_Dbg(p_stream, "%lld -> %lld (%f, r:%f)",
i_old_bitrate, i_new_bitrate, tr->fact_x,
(float)i_old_bitrate / i_new_bitrate);
#endif
}
i_old_bitrate = i_bitrate;
i_old_duration = id->i_next_gop_duration;
if ( i_bitrate > p_stream->p_sys->i_vbitrate )
{
tr->fact_x = (double)i_bitrate / p_stream->p_sys->i_vbitrate;
}
else
{
tr->fact_x = 1.0;
}
id->tr.i_current_gop_size = id->i_next_gop_size;
id->tr.i_wanted_gop_size = (p_stream->p_sys->i_vbitrate)
* (id->i_next_gop_duration / 1000) / 8000;
id->tr.i_new_gop_size = 0;
id->p_current_buffer = id->p_next_gop;
id->p_next_gop = NULL;
id->i_next_gop_duration = 0;
id->i_next_gop_size = 0;
}
}
/* Store the buffer for the next GOP. */
sout_BufferChain( &id->p_next_gop, in );
id->i_next_gop_duration += in->i_length;
id->i_next_gop_size += in->i_size;
if ( id->p_current_buffer != NULL )
{
sout_buffer_t * p_next = id->p_current_buffer->p_next;
if ( tr->fact_x == 1.0 )
{
bs->i_byte_out += id->p_current_buffer->i_size;
id->p_current_buffer->p_next = NULL;
sout_BufferChain( out, id->p_current_buffer );
}
else
{
process_frame( p_stream, id, id->p_current_buffer, out );
sout_BufferDelete(p_stream->p_sout, id->p_current_buffer);
}
id->p_current_buffer = p_next;
}
return VLC_SUCCESS;
......
modules/stream_out/transrate/transrate.h 0 → 100644
View file @ 7a649fb2
/*****************************************************************************
* transrate.h: MPEG2 video transrating module
*****************************************************************************
* Copyright (C) 2003 VideoLAN
* Copyright (C) 2003 Antoine Missout
* Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
* Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
* $Id: transrate.h,v 1.1 2004/03/03 11:20:52 massiot Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
* Laurent Aimar <fenrir@via.ecp.fr>
* Antoine Missout
* Michel Lespinasse <walken@zoy.org>
* Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* sout_stream_id_t:
*****************************************************************************/
typedef struct
{
uint8_t run;
short level;
} RunLevel;
typedef struct
{
uint8_t *p_c;
uint8_t *p_r;
uint8_t *p_w;
uint8_t *p_ow;
uint8_t *p_rw;
int i_bit_in;
int i_bit_out;
uint32_t i_bit_in_cache;
uint32_t i_bit_out_cache;
uint32_t i_byte_in;
uint32_t i_byte_out;
} bs_transrate_t;
typedef struct
{
bs_transrate_t bs;
/* MPEG2 state */
// seq header
unsigned int horizontal_size_value;
unsigned int vertical_size_value;
// pic header
unsigned int picture_coding_type;
// pic code ext
unsigned int f_code[2][2];
/* unsigned int intra_dc_precision; */
unsigned int picture_structure;
unsigned int frame_pred_frame_dct;
unsigned int concealment_motion_vectors;
unsigned int q_scale_type;
unsigned int intra_vlc_format;
/* unsigned int alternate_scan; */
// slice or mb
// quantizer_scale_code
unsigned int quantizer_scale;
unsigned int new_quantizer_scale;
unsigned int last_coded_scale;
int h_offset, v_offset;
// mb
double quant_corr, fact_x, current_fact_x;
int level_i, level_p;
ssize_t i_current_gop_size, i_wanted_gop_size, i_new_gop_size;
} transrate_t;
struct sout_stream_id_t
{
void *id;
vlc_bool_t b_transrate;
sout_buffer_t *p_current_buffer;
sout_buffer_t *p_next_gop;
mtime_t i_next_gop_duration;
size_t i_next_gop_size;
transrate_t tr;
};
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