/***************************************************************************** * video.c: video decoder using the libavcodec library ***************************************************************************** * Copyright (C) 1999-2001 VLC authors and VideoLAN * $Id$ * * Authors: Laurent Aimar <fenrir@via.ecp.fr> * Gildas Bazin <gbazin@videolan.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <vlc_common.h> #include <vlc_codec.h> #include <vlc_avcodec.h> #include <vlc_cpu.h> #include <vlc_modules.h> #include <assert.h> #include <libavcodec/avcodec.h> #include <libavutil/mem.h> #include <libavutil/pixdesc.h> #include "avcodec.h" #include "va.h" /***************************************************************************** * decoder_sys_t : decoder descriptor *****************************************************************************/ struct decoder_sys_t { AVCODEC_COMMON_MEMBERS /* Video decoder specific part */ mtime_t i_pts; AVFrame *p_ff_pic; /* for frame skipping algo */ bool b_hurry_up; enum AVDiscard i_skip_frame; enum AVDiscard i_skip_idct; /* how many decoded frames are late */ int i_late_frames; mtime_t i_late_frames_start; /* for direct rendering */ bool b_direct_rendering; int i_direct_rendering_used; bool b_has_b_frames; /* Hack to force display of still pictures */ bool b_first_frame; /* */ #if LIBAVCODEC_VERSION_MAJOR < 54 AVPaletteControl palette; #else # warning FIXME #endif /* */ bool b_flush; /* VA API */ vlc_va_t *p_va; vlc_sem_t sem_mt; }; #ifdef HAVE_AVCODEC_MT # define wait_mt(s) vlc_sem_wait( &s->sem_mt ) # define post_mt(s) vlc_sem_post( &s->sem_mt ) #else # define wait_mt(s) # define post_mt(s) #endif /***************************************************************************** * Local prototypes *****************************************************************************/ static void ffmpeg_InitCodec ( decoder_t * ); static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * ); static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * ); static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * ); static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * ); static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *, const enum PixelFormat * ); static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc ) { uint8_t *p = (uint8_t*)&fcc; return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); } /***************************************************************************** * Local Functions *****************************************************************************/ /* Returns a new picture buffer */ static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec, AVCodecContext *p_context ) { decoder_sys_t *p_sys = p_dec->p_sys; p_dec->fmt_out.video.i_width = p_context->width; p_dec->fmt_out.video.i_height = p_context->height; if( !p_context->width || !p_context->height ) { return NULL; /* invalid display size */ } if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) ) { /* we are doomed, but not really, because most codecs set their pix_fmt * much later * FIXME does it make sense here ? */ p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420; } p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma; /* If an aspect-ratio was specified in the input format then force it */ if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 ) { p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num; p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den; } else { p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num; p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den; if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den ) { p_dec->fmt_out.video.i_sar_num = 1; p_dec->fmt_out.video.i_sar_den = 1; } } if( p_dec->fmt_in.video.i_frame_rate > 0 && p_dec->fmt_in.video.i_frame_rate_base > 0 ) { p_dec->fmt_out.video.i_frame_rate = p_dec->fmt_in.video.i_frame_rate; p_dec->fmt_out.video.i_frame_rate_base = p_dec->fmt_in.video.i_frame_rate_base; } else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 ) { p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den; p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num; } return decoder_NewPicture( p_dec ); } /***************************************************************************** * InitVideo: initialize the video decoder ***************************************************************************** * the ffmpeg codec will be opened, some memory allocated. The vout is not yet * opened (done after the first decoded frame). *****************************************************************************/ int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context, AVCodec *p_codec, int i_codec_id, const char *psz_namecodec ) { decoder_sys_t *p_sys; int i_val; /* Allocate the memory needed to store the decoder's structure */ if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL ) return VLC_ENOMEM; p_codec->type = AVMEDIA_TYPE_VIDEO; p_context->codec_type = AVMEDIA_TYPE_VIDEO; p_context->codec_id = i_codec_id; p_sys->p_context = p_context; p_sys->p_codec = p_codec; p_sys->i_codec_id = i_codec_id; p_sys->psz_namecodec = psz_namecodec; p_sys->p_ff_pic = avcodec_alloc_frame(); p_sys->b_delayed_open = true; p_sys->p_va = NULL; vlc_sem_init( &p_sys->sem_mt, 0 ); /* ***** Fill p_context with init values ***** */ p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec ); /* ***** Get configuration of ffmpeg plugin ***** */ p_sys->p_context->workaround_bugs = var_InheritInteger( p_dec, "avcodec-workaround-bugs" ); #if LIBAVCODEC_VERSION_MAJOR < 54 p_sys->p_context->error_recognition = #else p_sys->p_context->err_recognition = #endif var_InheritInteger( p_dec, "avcodec-error-resilience" ); if( var_CreateGetBool( p_dec, "grayscale" ) ) p_sys->p_context->flags |= CODEC_FLAG_GRAY; i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" ); if( i_val ) p_sys->p_context->debug_mv = i_val; i_val = var_CreateGetInteger( p_dec, "avcodec-lowres" ); if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val; i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" ); if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL; else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY; else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR; else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF; if( var_CreateGetBool( p_dec, "avcodec-fast" ) ) p_sys->p_context->flags2 |= CODEC_FLAG2_FAST; /* ***** libavcodec frame skipping ***** */ p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" ); switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) ) { case -1: p_sys->p_context->skip_frame = AVDISCARD_NONE; break; case 0: p_sys->p_context->skip_frame = AVDISCARD_DEFAULT; break; case 1: p_sys->p_context->skip_frame = AVDISCARD_NONREF; break; case 2: p_sys->p_context->skip_frame = AVDISCARD_NONKEY; break; case 3: p_sys->p_context->skip_frame = AVDISCARD_ALL; break; default: p_sys->p_context->skip_frame = AVDISCARD_NONE; break; } p_sys->i_skip_frame = p_sys->p_context->skip_frame; switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) ) { case -1: p_sys->p_context->skip_idct = AVDISCARD_NONE; break; case 0: p_sys->p_context->skip_idct = AVDISCARD_DEFAULT; break; case 1: p_sys->p_context->skip_idct = AVDISCARD_NONREF; break; case 2: p_sys->p_context->skip_idct = AVDISCARD_NONKEY; break; case 3: p_sys->p_context->skip_idct = AVDISCARD_ALL; break; default: p_sys->p_context->skip_idct = AVDISCARD_NONE; break; } p_sys->i_skip_idct = p_sys->p_context->skip_idct; /* ***** libavcodec direct rendering ***** */ p_sys->b_direct_rendering = false; p_sys->i_direct_rendering_used = -1; if( var_CreateGetBool( p_dec, "avcodec-dr" ) && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) && /* No idea why ... but this fixes flickering on some TSCC streams */ p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD && p_sys->i_codec_id != CODEC_ID_CINEPAK && !p_sys->p_context->debug_mv ) { /* Some codecs set pix_fmt only after the 1st frame has been decoded, * so we need to do another check in ffmpeg_GetFrameBuf() */ p_sys->b_direct_rendering = true; } /* libavcodec doesn't properly release old pictures when frames are skipped */ //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false; if( p_sys->b_direct_rendering ) { msg_Dbg( p_dec, "trying to use direct rendering" ); p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE; } else { msg_Dbg( p_dec, "direct rendering is disabled" ); } /* Always use our get_buffer wrapper so we can calculate the * PTS correctly */ p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf; p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf; p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf; p_sys->p_context->opaque = p_dec; #ifdef HAVE_AVCODEC_MT int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" ); if( i_thread_count <= 0 ) { i_thread_count = vlc_GetCPUCount(); if( i_thread_count > 1 ) i_thread_count++; //FIXME: take in count the decoding time i_thread_count = __MIN( i_thread_count, 4 ); } i_thread_count = __MIN( i_thread_count, 16 ); msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count ); p_sys->p_context->thread_count = i_thread_count; #endif char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */ if( (hw == NULL || strcasecmp( hw, "none" )) && (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO || i_codec_id == CODEC_ID_MPEG4 || i_codec_id == CODEC_ID_H264 || i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) ) { #ifdef HAVE_AVCODEC_MT if( p_sys->p_context->thread_type & FF_THREAD_FRAME ) { msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" ); p_sys->p_context->thread_type &= ~FF_THREAD_FRAME; } if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) && ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) ) { msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" ); p_sys->p_context->thread_type &= ~FF_THREAD_SLICE; } #endif p_sys->p_context->get_format = ffmpeg_GetFormat; } free( hw ); #ifdef HAVE_AVCODEC_MT if( p_sys->p_context->thread_type & FF_THREAD_FRAME ) p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count; #endif /* ***** misc init ***** */ p_sys->i_pts = VLC_TS_INVALID; p_sys->b_has_b_frames = false; p_sys->b_first_frame = true; p_sys->b_flush = false; p_sys->i_late_frames = 0; /* Set output properties */ p_dec->fmt_out.i_cat = VIDEO_ES; if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ) { /* we are doomed. but not really, because most codecs set their pix_fmt later on */ p_dec->fmt_out.i_codec = VLC_CODEC_I420; } p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma; #if LIBAVCODEC_VERSION_MAJOR < 54 /* Setup palette */ memset( &p_sys->palette, 0, sizeof(p_sys->palette) ); if( p_dec->fmt_in.video.p_palette ) { p_sys->palette.palette_changed = 1; for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ ) { union { uint32_t u; uint8_t a[4]; } c; c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0]; c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1]; c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2]; c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3]; p_sys->palette.palette[i] = c.u; } p_sys->p_context->palctrl = &p_sys->palette; p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) ); if( p_dec->fmt_out.video.p_palette ) *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette; } else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK ) { p_sys->p_context->palctrl = &p_sys->palette; } #else # warning FIXME #endif /* ***** init this codec with special data ***** */ ffmpeg_InitCodec( p_dec ); /* ***** Open the codec ***** */ if( ffmpeg_OpenCodec( p_dec ) < 0 ) { msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec ); av_free( p_sys->p_ff_pic ); vlc_sem_destroy( &p_sys->sem_mt ); free( p_sys ); return VLC_EGENERIC; } return VLC_SUCCESS; } /***************************************************************************** * DecodeVideo: Called to decode one or more frames *****************************************************************************/ picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block ) { decoder_sys_t *p_sys = p_dec->p_sys; AVCodecContext *p_context = p_sys->p_context; int b_drawpicture; int b_null_size = false; block_t *p_block; if( !pp_block || !*pp_block ) return NULL; if( !p_context->extradata_size && p_dec->fmt_in.i_extra ) { ffmpeg_InitCodec( p_dec ); if( p_sys->b_delayed_open ) { if( ffmpeg_OpenCodec( p_dec ) ) msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec ); } } p_block = *pp_block; if( p_sys->b_delayed_open ) { block_Release( p_block ); return NULL; } if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) ) { p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */ p_sys->i_late_frames = 0; if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY ) avcodec_flush_buffers( p_context ); block_Release( p_block ); return NULL; } if( p_block->i_flags & BLOCK_FLAG_PREROLL ) { /* Do not care about late frames when prerolling * TODO avoid decoding of non reference frame * (ie all B except for H264 where it depends only on nal_ref_idc) */ p_sys->i_late_frames = 0; } if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) && (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) ) { if( p_sys->i_pts > VLC_TS_INVALID ) { msg_Err( p_dec, "more than 5 seconds of late video -> " "dropping frame (computer too slow ?)" ); p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */ } block_Release( p_block ); p_sys->i_late_frames--; return NULL; } /* A good idea could be to decode all I pictures and see for the other */ if( !p_dec->b_pace_control && p_sys->b_hurry_up && (p_sys->i_late_frames > 4) ) { b_drawpicture = 0; if( p_sys->i_late_frames < 12 ) { p_context->skip_frame = (p_sys->i_skip_frame <= AVDISCARD_NONREF) ? AVDISCARD_NONREF : p_sys->i_skip_frame; } else { /* picture too late, won't decode * but break picture until a new I, and for mpeg4 ...*/ p_sys->i_late_frames--; /* needed else it will never be decrease */ block_Release( p_block ); return NULL; } } else { if( p_sys->b_hurry_up ) p_context->skip_frame = p_sys->i_skip_frame; if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) ) b_drawpicture = 1; else b_drawpicture = 0; } if( p_context->width <= 0 || p_context->height <= 0 ) { if( p_sys->b_hurry_up ) p_context->skip_frame = p_sys->i_skip_frame; b_null_size = true; } else if( !b_drawpicture ) { /* It creates broken picture * FIXME either our parser or ffmpeg is broken */ #if 0 if( p_sys->b_hurry_up ) p_context->skip_frame = __MAX( p_context->skip_frame, AVDISCARD_NONREF ); #endif } /* * Do the actual decoding now */ /* Don't forget that libavcodec requires a little more bytes * that the real frame size */ if( p_block->i_buffer > 0 ) { p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0; p_block = block_Realloc( p_block, 0, p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE ); if( !p_block ) return NULL; p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE; *pp_block = p_block; memset( p_block->p_buffer + p_block->i_buffer, 0, FF_INPUT_BUFFER_PADDING_SIZE ); } while( p_block->i_buffer > 0 || p_sys->b_flush ) { int i_used, b_gotpicture; picture_t *p_pic; AVPacket pkt; /* Set the PTS/DTS in the context reordered_opaque field */ if( p_block->i_pts > VLC_TS_INVALID ) p_context->reordered_opaque = (p_block->i_pts << 1) | 0; else if( p_block->i_dts > VLC_TS_INVALID ) p_context->reordered_opaque = (p_block->i_dts << 1) | 1; else p_context->reordered_opaque = INT64_MIN; p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque; /* Make sure we don't reuse the same timestamps twice */ p_block->i_pts = p_block->i_dts = VLC_TS_INVALID; post_mt( p_sys ); av_init_packet( &pkt ); pkt.data = p_block->p_buffer; pkt.size = p_block->i_buffer; i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic, &b_gotpicture, &pkt ); if( b_null_size && !p_sys->b_flush && p_context->width > 0 && p_context->height > 0 ) { /* Reparse it to not drop the I frame */ b_null_size = false; if( p_sys->b_hurry_up ) p_context->skip_frame = p_sys->i_skip_frame; i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic, &b_gotpicture, &pkt ); } wait_mt( p_sys ); if( p_sys->b_flush ) p_sys->b_first_frame = true; if( p_block->i_buffer <= 0 ) p_sys->b_flush = false; if( i_used < 0 ) { if( b_drawpicture ) msg_Warn( p_dec, "cannot decode one frame (%zu bytes)", p_block->i_buffer ); block_Release( p_block ); return NULL; } else if( i_used > p_block->i_buffer || p_context->thread_count > 1 ) { i_used = p_block->i_buffer; } /* Consumed bytes */ p_block->i_buffer -= i_used; p_block->p_buffer += i_used; /* Nothing to display */ if( !b_gotpicture ) { if( i_used == 0 ) break; continue; } /* Sanity check (seems to be needed for some streams) */ if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B) { p_sys->b_has_b_frames = true; } /* Compute the PTS */ mtime_t i_pts = VLC_TS_INVALID; if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN ) { mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1; bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1; if( b_dts ) { if( !p_context->has_b_frames || !p_sys->b_has_b_frames || !p_sys->p_ff_pic->reference || p_sys->i_pts <= VLC_TS_INVALID ) i_pts = i_ts; /* Guess what ? The rules are different for Real Video :( */ if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 || p_dec->fmt_in.i_codec == VLC_CODEC_RV40) && p_sys->b_has_b_frames ) { i_pts = VLC_TS_INVALID; if(p_sys->p_ff_pic->reference) i_pts = i_ts; } } else { i_pts = i_ts; } } if( i_pts <= VLC_TS_INVALID ) i_pts = p_sys->i_pts; /* Interpolate the next PTS */ if( i_pts > VLC_TS_INVALID ) p_sys->i_pts = i_pts; if( p_sys->i_pts > VLC_TS_INVALID ) { /* interpolate the next PTS */ if( p_dec->fmt_in.video.i_frame_rate > 0 && p_dec->fmt_in.video.i_frame_rate_base > 0 ) { p_sys->i_pts += INT64_C(1000000) * (2 + p_sys->p_ff_pic->repeat_pict) * p_dec->fmt_in.video.i_frame_rate_base / (2 * p_dec->fmt_in.video.i_frame_rate); } else if( p_context->time_base.den > 0 ) { int i_tick = p_context->ticks_per_frame; if( i_tick <= 0 ) i_tick = 1; p_sys->i_pts += INT64_C(1000000) * (2 + p_sys->p_ff_pic->repeat_pict) * i_tick * p_context->time_base.num / (2 * p_context->time_base.den); } } /* Update frame late count (except when doing preroll) */ mtime_t i_display_date = 0; if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) ) i_display_date = decoder_GetDisplayDate( p_dec, i_pts ); if( i_display_date > 0 && i_display_date <= mdate() ) { p_sys->i_late_frames++; if( p_sys->i_late_frames == 1 ) p_sys->i_late_frames_start = mdate(); } else { p_sys->i_late_frames = 0; } if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) ) continue; if( !p_sys->p_ff_pic->opaque ) { /* Get a new picture */ p_pic = ffmpeg_NewPictBuf( p_dec, p_context ); if( !p_pic ) { block_Release( p_block ); return NULL; } /* Fill p_picture_t from AVVideoFrame and do chroma conversion * if needed */ ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic ); } else { p_pic = (picture_t *)p_sys->p_ff_pic->opaque; decoder_LinkPicture( p_dec, p_pic ); } if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den ) { /* Fetch again the aspect ratio in case it changed */ p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num; p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den; if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den ) { p_dec->fmt_out.video.i_sar_num = 1; p_dec->fmt_out.video.i_sar_den = 1; } } /* Send decoded frame to vout */ if( i_pts > VLC_TS_INVALID) { p_pic->date = i_pts; if( p_sys->b_first_frame ) { /* Hack to force display of still pictures */ p_sys->b_first_frame = false; p_pic->b_force = true; } p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict; p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame; p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first; p_pic->i_qstride = p_sys->p_ff_pic->qstride; int i_mb_h = ( p_pic->format.i_height + 15 ) / 16; p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h ); memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table, p_pic->i_qstride * i_mb_h ); switch( p_sys->p_ff_pic->qscale_type ) { case FF_QSCALE_TYPE_MPEG1: p_pic->i_qtype = QTYPE_MPEG1; break; case FF_QSCALE_TYPE_MPEG2: p_pic->i_qtype = QTYPE_MPEG2; break; case FF_QSCALE_TYPE_H264: p_pic->i_qtype = QTYPE_H264; break; } return p_pic; } else { decoder_DeletePicture( p_dec, p_pic ); } } block_Release( p_block ); return NULL; } /***************************************************************************** * EndVideo: decoder destruction ***************************************************************************** * This function is called when the thread ends after a successful * initialization. *****************************************************************************/ void EndVideoDec( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; post_mt( p_sys ); /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */ if( p_sys->p_context->codec ) avcodec_flush_buffers( p_sys->p_context ); wait_mt( p_sys ); if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic ); if( p_sys->p_va ) { vlc_va_Delete( p_sys->p_va ); p_sys->p_va = NULL; } vlc_sem_destroy( &p_sys->sem_mt ); } /***************************************************************************** * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg *****************************************************************************/ static void ffmpeg_InitCodec( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; int i_size = p_dec->fmt_in.i_extra; if( !i_size ) return; if( p_sys->i_codec_id == CODEC_ID_SVQ3 ) { uint8_t *p; p_sys->p_context->extradata_size = i_size + 12; p = p_sys->p_context->extradata = malloc( p_sys->p_context->extradata_size ); if( !p ) return; memcpy( &p[0], "SVQ3", 4 ); memset( &p[4], 0, 8 ); memcpy( &p[12], p_dec->fmt_in.p_extra, i_size ); /* Now remove all atoms before the SMI one */ if( p_sys->p_context->extradata_size > 0x5a && strncmp( (char*)&p[0x56], "SMI ", 4 ) ) { uint8_t *psz = &p[0x52]; while( psz < &p[p_sys->p_context->extradata_size - 8] ) { int i_size = GetDWBE( psz ); if( i_size <= 1 ) { /* FIXME handle 1 as long size */ break; } if( !strncmp( (char*)&psz[4], "SMI ", 4 ) ) { memmove( &p[0x52], psz, &p[p_sys->p_context->extradata_size] - psz ); break; } psz += i_size; } } } else { p_sys->p_context->extradata_size = i_size; p_sys->p_context->extradata = malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE ); if( p_sys->p_context->extradata ) { memcpy( p_sys->p_context->extradata, p_dec->fmt_in.p_extra, i_size ); memset( &((uint8_t*)p_sys->p_context->extradata)[i_size], 0, FF_INPUT_BUFFER_PADDING_SIZE ); } } } /***************************************************************************** * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a * picture_t structure (when not in direct rendering mode). *****************************************************************************/ static void ffmpeg_CopyPicture( decoder_t *p_dec, picture_t *p_pic, AVFrame *p_ff_pic ) { decoder_sys_t *p_sys = p_dec->p_sys; if( p_sys->p_va ) { vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic ); } else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS ) { int i_plane, i_size, i_line; uint8_t *p_dst, *p_src; int i_src_stride, i_dst_stride; for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ ) { p_src = p_ff_pic->data[i_plane]; p_dst = p_pic->p[i_plane].p_pixels; i_src_stride = p_ff_pic->linesize[i_plane]; i_dst_stride = p_pic->p[i_plane].i_pitch; i_size = __MIN( i_src_stride, i_dst_stride ); for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines; i_line++ ) { memcpy( p_dst, p_src, i_size ); p_src += i_src_stride; p_dst += i_dst_stride; } } } else { const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt ); msg_Err( p_dec, "Unsupported decoded output format %d (%s)", p_sys->p_context->pix_fmt, name ? name : "unknown" ); p_dec->b_error = 1; } } /***************************************************************************** * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer. ***************************************************************************** * It is used for direct rendering as well as to get the right PTS for each * decoded picture (even in indirect rendering mode). *****************************************************************************/ static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic ) { decoder_t *p_dec = (decoder_t *)p_context->opaque; decoder_sys_t *p_sys = p_dec->p_sys; picture_t *p_pic; /* */ p_ff_pic->reordered_opaque = p_context->reordered_opaque; p_ff_pic->opaque = NULL; if( p_sys->p_va ) { /* hwaccel_context is not present in old ffmpeg version */ if( vlc_va_Setup( p_sys->p_va, &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma, p_context->width, p_context->height ) ) { msg_Err( p_dec, "vlc_va_Setup failed" ); return -1; } /* */ p_ff_pic->type = FF_BUFFER_TYPE_USER; #if LIBAVCODEC_VERSION_MAJOR < 54 p_ff_pic->age = 256*256*256*64; #endif if( vlc_va_Get( p_sys->p_va, p_ff_pic ) ) { msg_Err( p_dec, "VaGrabSurface failed" ); return -1; } return 0; } else if( !p_sys->b_direct_rendering ) { /* Not much to do in indirect rendering mode. */ return avcodec_default_get_buffer( p_context, p_ff_pic ); } wait_mt( p_sys ); /* Some codecs set pix_fmt only after the 1st frame has been decoded, * so we need to check for direct rendering again. */ int i_width = p_context->width; int i_height = p_context->height; avcodec_align_dimensions( p_context, &i_width, &i_height ); if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS || p_context->pix_fmt == PIX_FMT_PAL8 ) goto no_dr; p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma; /* Get a new picture */ p_pic = ffmpeg_NewPictBuf( p_dec, p_context ); if( !p_pic ) goto no_dr; bool b_compatible = true; if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width || p_pic->p[0].i_lines < i_height ) b_compatible = false; for( int i = 0; i < p_pic->i_planes && b_compatible; i++ ) { unsigned i_align; switch( p_sys->i_codec_id ) { case CODEC_ID_SVQ1: case CODEC_ID_VP5: case CODEC_ID_VP6: case CODEC_ID_VP6F: case CODEC_ID_VP6A: i_align = 16; break; default: i_align = i == 0 ? 16 : 8; break; } if( p_pic->p[i].i_pitch % i_align ) b_compatible = false; if( (intptr_t)p_pic->p[i].p_pixels % i_align ) b_compatible = false; } if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible ) { if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch || 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch ) b_compatible = false; } if( !b_compatible ) { decoder_DeletePicture( p_dec, p_pic ); goto no_dr; } if( p_sys->i_direct_rendering_used != 1 ) { msg_Dbg( p_dec, "using direct rendering" ); p_sys->i_direct_rendering_used = 1; } p_context->draw_horiz_band = NULL; p_ff_pic->opaque = (void*)p_pic; p_ff_pic->type = FF_BUFFER_TYPE_USER; p_ff_pic->data[0] = p_pic->p[0].p_pixels; p_ff_pic->data[1] = p_pic->p[1].p_pixels; p_ff_pic->data[2] = p_pic->p[2].p_pixels; p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */ p_ff_pic->linesize[0] = p_pic->p[0].i_pitch; p_ff_pic->linesize[1] = p_pic->p[1].i_pitch; p_ff_pic->linesize[2] = p_pic->p[2].i_pitch; p_ff_pic->linesize[3] = 0; #if LIBAVCODEC_VERSION_MAJOR < 54 p_ff_pic->age = 256*256*256*64; #endif post_mt( p_sys ); return 0; no_dr: if( p_sys->i_direct_rendering_used != 0 ) { msg_Warn( p_dec, "disabling direct rendering" ); p_sys->i_direct_rendering_used = 0; } post_mt( p_sys ); return avcodec_default_get_buffer( p_context, p_ff_pic ); } static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic ) { p_ff_pic->reordered_opaque = p_context->reordered_opaque; /* We always use default reget function, it works perfectly fine */ return avcodec_default_reget_buffer( p_context, p_ff_pic ); } static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic ) { decoder_t *p_dec = (decoder_t *)p_context->opaque; decoder_sys_t *p_sys = p_dec->p_sys; if( p_sys->p_va ) { vlc_va_Release( p_sys->p_va, p_ff_pic ); } else if( !p_ff_pic->opaque ) { /* We can end up here without the AVFrame being allocated by * avcodec_default_get_buffer() if VA is used and the frame is * released when the decoder is closed */ if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL ) avcodec_default_release_buffer( p_context, p_ff_pic ); } else { picture_t *p_pic = (picture_t*)p_ff_pic->opaque; decoder_UnlinkPicture( p_dec, p_pic ); } for( int i = 0; i < 4; i++ ) p_ff_pic->data[i] = NULL; } static int ffmpeg_va_Start( void *func, va_list ap ) { vlc_va_t *va = va_arg( ap, vlc_va_t * ); int codec = va_arg( ap, int ); const es_format_t *fmt = va_arg( ap, const es_format_t * ); int (*open)( vlc_va_t *, int, const es_format_t * ) = func; return open( va, codec, fmt ); } static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id, const es_format_t *fmt ) { vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) ); if( unlikely(p_va == NULL) ) return NULL; p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw", true, ffmpeg_va_Start, p_va, codec_id, fmt ); if( p_va->module == NULL ) { vlc_object_release( p_va ); p_va = NULL; } return p_va; } static void ffmpeg_va_Stop( void *func, va_list ap ) { vlc_va_t *va = va_arg( ap, vlc_va_t * ); void (*close)( vlc_va_t * ) = func; close( va ); } static void vlc_va_Delete( vlc_va_t *va ) { vlc_module_unload( va->module, ffmpeg_va_Stop, va ); vlc_object_release( va ); } static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context, const enum PixelFormat *pi_fmt ) { decoder_t *p_dec = p_context->opaque; decoder_sys_t *p_sys = p_dec->p_sys; vlc_va_t *p_va = p_sys->p_va; if( p_va != NULL ) vlc_va_Delete( p_va ); p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in ); if( p_va != NULL ) { /* Try too look for a supported hw acceleration */ for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ ) { const char *name = av_get_pix_fmt_name(pi_fmt[i]); msg_Dbg( p_dec, "Available decoder output format %d (%s)", pi_fmt[i], name ? name : "unknown" ); if( p_va->pix_fmt != pi_fmt[i] ) continue; /* We try to call vlc_va_Setup when possible to detect errors when * possible (later is too late) */ if( p_context->width > 0 && p_context->height > 0 && vlc_va_Setup( p_va, &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma, p_context->width, p_context->height ) ) { msg_Err( p_dec, "acceleration setup failure" ); break; } if( p_va->description ) msg_Info( p_dec, "Using %s for hardware decoding.", p_va->description ); /* FIXME this will disable direct rendering * even if a new pixel format is renegotiated */ p_sys->b_direct_rendering = false; p_sys->p_va = p_va; p_context->draw_horiz_band = NULL; return pi_fmt[i]; } msg_Err( p_dec, "acceleration not available" ); vlc_va_Delete( p_va ); } p_sys->p_va = NULL; /* Fallback to default behaviour */ return avcodec_default_get_format( p_context, pi_fmt ); }