/***************************************************************************** * video.c: video decoder using the libavcodec library ***************************************************************************** * Copyright (C) 1999-2001 VLC authors and VideoLAN * $Id$ * * Authors: Laurent Aimar * Gildas Bazin * * 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 #include #include #include #include #include #include #include #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; /* */ bool palette_sent; /* */ 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 * ); #if LIBAVCODEC_VERSION_MAJOR >= 55 static int lavc_GetFrame(struct AVCodecContext *, AVFrame *, int); #else static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * ); static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * ); #endif static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *, const enum PixelFormat * ); static picture_t *DecodeVideo( decoder_t *, block_t ** ); 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; int width = p_context->coded_width; int height = p_context->coded_height; if( p_sys->p_va == NULL ) { int aligns[AV_NUM_DATA_POINTERS]; avcodec_align_dimensions2(p_context, &width, &height, aligns); } if( width == 0 || height == 0 || width > 8192 || height > 8192 ) { msg_Err( p_dec, "Invalid frame size %dx%d.", width, height ); return NULL; /* invalid display size */ } p_dec->fmt_out.video.i_width = width; p_dec->fmt_out.video.i_height = height; if( width != p_context->width || height != p_context->height ) { p_dec->fmt_out.video.i_visible_width = p_context->width; p_dec->fmt_out.video.i_visible_height = p_context->height; } else { p_dec->fmt_out.video.i_visible_width = width; p_dec->fmt_out.video.i_visible_height = height; } 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 * __MAX( p_context->ticks_per_frame, 1 ); } return decoder_NewPicture( p_dec ); } static int OpenVideoCodec( decoder_t *p_dec ) { decoder_sys_t *p_sys = p_dec->p_sys; if( p_sys->p_context->extradata_size <= 0 ) { if( p_sys->i_codec_id == AV_CODEC_ID_VC1 || p_sys->i_codec_id == AV_CODEC_ID_THEORA ) { msg_Warn( p_dec, "waiting for extra data for codec %s", p_sys->psz_namecodec ); return 1; } } p_sys->p_context->width = p_dec->fmt_in.video.i_visible_width; p_sys->p_context->height = p_dec->fmt_in.video.i_visible_height; if (p_sys->p_context->width == 0) p_sys->p_context->width = p_dec->fmt_in.video.i_width; else if (p_sys->p_context->width != p_dec->fmt_in.video.i_width) p_sys->p_context->coded_width = p_dec->fmt_in.video.i_width; if (p_sys->p_context->height == 0) p_sys->p_context->height = p_dec->fmt_in.video.i_height; else if (p_sys->p_context->height != p_dec->fmt_in.video.i_height) p_sys->p_context->coded_height = p_dec->fmt_in.video.i_height; p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel; int ret = ffmpeg_OpenCodec( p_dec ); if( ret < 0 ) return ret; #ifdef HAVE_AVCODEC_MT switch( p_sys->p_context->active_thread_type ) { case FF_THREAD_FRAME: msg_Dbg( p_dec, "using frame thread mode with %d threads", p_sys->p_context->thread_count ); break; case FF_THREAD_SLICE: msg_Dbg( p_dec, "using slice thread mode with %d threads", p_sys->p_context->thread_count ); break; case 0: if( p_sys->p_context->thread_count > 1 ) msg_Warn( p_dec, "failed to enable threaded decoding" ); break; default: msg_Warn( p_dec, "using unknown thread mode with %d threads", p_sys->p_context->thread_count ); break; } #endif return VLC_SUCCESS; } /***************************************************************************** * 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_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec ); /* ***** Get configuration of ffmpeg plugin ***** */ p_context->workaround_bugs = var_InheritInteger( p_dec, "avcodec-workaround-bugs" ); p_context->err_recognition = var_InheritInteger( p_dec, "avcodec-error-resilience" ); if( var_CreateGetBool( p_dec, "grayscale" ) ) p_context->flags |= CODEC_FLAG_GRAY; /* ***** Output always the frames ***** */ #if LIBAVCODEC_VERSION_CHECK(55, 23, 1, 40, 101) p_context->flags |= CODEC_FLAG_OUTPUT_CORRUPT; #endif i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" ); if( i_val ) p_context->debug_mv = i_val; i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" ); if( i_val >= 4 ) p_context->skip_loop_filter = AVDISCARD_ALL; else if( i_val == 3 ) p_context->skip_loop_filter = AVDISCARD_NONKEY; else if( i_val == 2 ) p_context->skip_loop_filter = AVDISCARD_BIDIR; else if( i_val == 1 ) p_context->skip_loop_filter = AVDISCARD_NONREF; if( var_CreateGetBool( p_dec, "avcodec-fast" ) ) p_context->flags2 |= CODEC_FLAG2_FAST; /* ***** libavcodec frame skipping ***** */ p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" ); i_val = var_CreateGetInteger( p_dec, "avcodec-skip-frame" ); if( i_val >= 4 ) p_context->skip_frame = AVDISCARD_ALL; else if( i_val == 3 ) p_context->skip_frame = AVDISCARD_NONKEY; else if( i_val == 2 ) p_context->skip_frame = AVDISCARD_BIDIR; else if( i_val == 1 ) p_context->skip_frame = AVDISCARD_NONREF; else if( i_val == -1 ) p_context->skip_frame = AVDISCARD_NONE; else p_context->skip_frame = AVDISCARD_DEFAULT; p_sys->i_skip_frame = p_context->skip_frame; i_val = var_CreateGetInteger( p_dec, "avcodec-skip-idct" ); if( i_val >= 4 ) p_context->skip_idct = AVDISCARD_ALL; else if( i_val == 3 ) p_context->skip_idct = AVDISCARD_NONKEY; else if( i_val == 2 ) p_context->skip_idct = AVDISCARD_BIDIR; else if( i_val == 1 ) p_context->skip_idct = AVDISCARD_NONREF; else if( i_val == -1 ) p_context->skip_idct = AVDISCARD_NONE; else p_context->skip_idct = AVDISCARD_DEFAULT; p_sys->i_skip_idct = 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 != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD && p_sys->i_codec_id != AV_CODEC_ID_CINEPAK && !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_context->flags |= CODEC_FLAG_EMU_EDGE; } else { msg_Dbg( p_dec, "direct rendering is disabled" ); } p_context->get_format = ffmpeg_GetFormat; /* Always use our get_buffer wrapper so we can calculate the * PTS correctly */ #if LIBAVCODEC_VERSION_MAJOR >= 55 p_context->get_buffer2 = lavc_GetFrame; #else p_context->get_buffer = ffmpeg_GetFrameBuf; p_context->reget_buffer = avcodec_default_reget_buffer; p_context->release_buffer = ffmpeg_ReleaseFrameBuf; #endif 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_context->thread_count = i_thread_count; p_context->thread_safe_callbacks = true; switch( i_codec_id ) { case AV_CODEC_ID_MPEG4: case AV_CODEC_ID_H263: p_context->thread_type = 0; break; case AV_CODEC_ID_MPEG1VIDEO: case AV_CODEC_ID_MPEG2VIDEO: p_context->thread_type &= ~FF_THREAD_SLICE; /* fall through */ # if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0)) case AV_CODEC_ID_H264: case AV_CODEC_ID_VC1: case AV_CODEC_ID_WMV3: p_context->thread_type &= ~FF_THREAD_FRAME; # endif } /* Workaround: frame multithreading is not compatible with * DXVA2. When a frame is being copied to host memory, the frame * is locked and cannot be used as a reference frame * simultaneously and thus decoding fails for some frames. This * causes major image corruption. */ # if defined(_WIN32) char *avcodec_hw = var_InheritString( p_dec, "avcodec-hw" ); if( avcodec_hw == NULL || strcasecmp( avcodec_hw, "none" ) ) { msg_Warn( p_dec, "threaded frame decoding is not compatible with DXVA2, disabled" ); p_context->thread_type &= ~FF_THREAD_FRAME; } free( avcodec_hw ); # endif if( p_context->thread_type & FF_THREAD_FRAME ) p_dec->i_extra_picture_buffers = 2 * 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; p_dec->fmt_out.video.orientation = p_dec->fmt_in.video.orientation; if( p_dec->fmt_in.video.p_palette ) { p_sys->palette_sent = false; 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 p_sys->palette_sent = true; /* ***** init this codec with special data ***** */ ffmpeg_InitCodec( p_dec ); /* ***** Open the codec ***** */ if( OpenVideoCodec( p_dec ) < 0 ) { avcodec_free_frame( &p_sys->p_ff_pic ); vlc_sem_destroy( &p_sys->sem_mt ); free( p_sys ); return VLC_EGENERIC; } p_dec->pf_decode_video = DecodeVideo; return VLC_SUCCESS; } /***************************************************************************** * DecodeVideo: Called to decode one or more frames *****************************************************************************/ static 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; block_t *p_block; if( !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 ) OpenVideoCodec( p_dec ); } p_block = *pp_block; if(!p_block && !(p_sys->p_codec->capabilities & CODEC_CAP_DELAY) ) return NULL; if( p_sys->b_delayed_open ) { if( p_block ) block_Release( p_block ); return NULL; } if( p_block) { 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; post_mt( p_sys ); if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY ) avcodec_flush_buffers( p_context ); wait_mt( p_sys ); 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 ) { p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */ } if( p_block ) block_Release( p_block ); p_sys->i_late_frames--; msg_Err( p_dec, "more than 5 seconds of late video -> " "dropping frame (computer too slow ?)" ); 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 */ if( p_block ) block_Release( p_block ); msg_Warn( p_dec, "More than 4 late frames, dropping frame" ); return NULL; } } else { if( p_sys->b_hurry_up ) p_context->skip_frame = p_sys->i_skip_frame; if( !p_block || !(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; } 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 && 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 || p_block->i_buffer > 0 || p_sys->b_flush ) { int i_used, b_gotpicture; picture_t *p_pic; AVPacket pkt; post_mt( p_sys ); av_init_packet( &pkt ); if( p_block ) { pkt.data = p_block->p_buffer; pkt.size = p_block->i_buffer; pkt.pts = p_block->i_pts; pkt.dts = p_block->i_dts; } else { /* Return delayed frames if codec has CODEC_CAP_DELAY */ pkt.data = NULL; pkt.size = 0; } if( !p_sys->palette_sent ) { uint8_t *pal = av_packet_new_side_data(&pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE); if (pal) { memcpy(pal, p_dec->fmt_in.video.p_palette->palette, AVPALETTE_SIZE); p_sys->palette_sent = true; } } /* Make sure we don't reuse the same timestamps twice */ if( p_block ) { p_block->i_pts = p_block->i_dts = VLC_TS_INVALID; } i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic, &b_gotpicture, &pkt ); av_free_packet( &pkt ); wait_mt( p_sys ); if( p_sys->b_flush ) p_sys->b_first_frame = true; if( p_block ) { 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( (unsigned)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 = p_sys->p_ff_pic->pkt_pts; if (i_pts <= VLC_TS_INVALID) i_pts = p_sys->p_ff_pic->pkt_dts; 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 += CLOCK_FREQ * (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 += CLOCK_FREQ * (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 || !(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_va != NULL || p_sys->p_ff_pic->opaque == NULL ) { /* Get a new picture */ p_pic = ffmpeg_NewPictBuf( p_dec, p_context ); if( !p_pic ) { if( p_block ) 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; return p_pic; } else { decoder_DeletePicture( p_dec, p_pic ); } } if( p_block ) 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 ) avcodec_free_frame( &p_sys->p_ff_pic ); if( p_sys->p_va ) vlc_va_Delete( p_sys->p_va ); 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 == AV_CODEC_ID_SVQ3 ) { uint8_t *p; p_sys->p_context->extradata_size = i_size + 12; p = p_sys->p_context->extradata = av_malloc( p_sys->p_context->extradata_size + FF_INPUT_BUFFER_PADDING_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 = av_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( 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->opaque, p_ff_pic->data[3] ); } else if( FindVlcChroma( p_sys->p_context->pix_fmt ) ) { int i_plane, i_size, i_line; uint8_t *p_dst, *p_src; int i_src_stride, i_dst_stride; if( p_sys->p_context->pix_fmt == PIX_FMT_PAL8 ) { if( !p_pic->format.p_palette ) p_pic->format.p_palette = calloc( 1, sizeof(video_palette_t) ); if( p_pic->format.p_palette ) { p_pic->format.p_palette->i_entries = AVPALETTE_COUNT; memcpy( p_pic->format.p_palette->palette, p_ff_pic->data[1], AVPALETTE_SIZE ); } } 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; } } #if LIBAVCODEC_VERSION_MAJOR >= 55 static int lavc_va_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags) { decoder_t *dec = ctx->opaque; decoder_sys_t *sys = dec->p_sys; vlc_va_t *va = sys->p_va; if (vlc_va_Setup(va, &ctx->hwaccel_context, &dec->fmt_out.video.i_chroma, ctx->coded_width, ctx->coded_height)) { msg_Err(dec, "hardware acceleration setup failed"); return -1; } if (vlc_va_Get(va, &frame->opaque, &frame->data[0])) { msg_Err(dec, "hardware acceleration picture allocation failed"); return -1; } /* data[0] must be non-NULL for libavcodec internal checks. * data[3] actually contains the format-specific surface handle. */ frame->data[3] = frame->data[0]; frame->buf[0] = av_buffer_create(frame->data[0], 0, va->release, frame->opaque, 0); if (unlikely(frame->buf[0] == NULL)) { vlc_va_Release(va, frame->opaque, frame->data[0]); return -1; } assert(frame->data[0] != NULL); (void) flags; return 0; } typedef struct { decoder_t *decoder; picture_t *picture; } lavc_pic_ref_t; static void lavc_dr_ReleaseFrame(void *opaque, uint8_t *data) { lavc_pic_ref_t *ref = opaque; decoder_UnlinkPicture(ref->decoder, ref->picture); free(ref); (void) data; } static picture_t *lavc_dr_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags) { decoder_t *dec = (decoder_t *)ctx->opaque; decoder_sys_t *sys = dec->p_sys; if (GetVlcChroma(&dec->fmt_out.video, ctx->pix_fmt) != VLC_SUCCESS) return NULL; dec->fmt_out.i_codec = dec->fmt_out.video.i_chroma; if (ctx->pix_fmt == PIX_FMT_PAL8) return NULL; int width = frame->width; int height = frame->height; int aligns[AV_NUM_DATA_POINTERS]; avcodec_align_dimensions2(ctx, &width, &height, aligns); picture_t *pic = ffmpeg_NewPictBuf(dec, ctx); if (pic == NULL) return NULL; /* Check that the picture is suitable for libavcodec */ if (pic->p[0].i_pitch < width * pic->p[0].i_pixel_pitch) { if (sys->i_direct_rendering_used != 0) msg_Dbg(dec, "plane 0: pitch too small (%d/%d*%d)", pic->p[0].i_pitch, width, pic->p[0].i_pixel_pitch); goto no_dr; } if (pic->p[0].i_lines < height) { if (sys->i_direct_rendering_used != 0) msg_Dbg(dec, "plane 0: lines too few (%d/%d)", pic->p[0].i_lines, height); goto no_dr; } for (int i = 0; i < pic->i_planes; i++) { if (pic->p[i].i_pitch % aligns[i]) { if (sys->i_direct_rendering_used != 0) msg_Dbg(dec, "plane %d: pitch not aligned (%d%%%d)", i, pic->p[i].i_pitch, aligns[i]); goto no_dr; } if (((uintptr_t)pic->p[i].p_pixels) % aligns[i]) { if (sys->i_direct_rendering_used != 0) msg_Warn(dec, "plane %d not aligned", i); goto no_dr; } } /* Allocate buffer references */ for (int i = 0; i < pic->i_planes; i++) { lavc_pic_ref_t *ref = malloc(sizeof (*ref)); if (ref == NULL) goto error; ref->decoder = dec; ref->picture = pic; decoder_LinkPicture(dec, pic); uint8_t *data = pic->p[i].p_pixels; int size = pic->p[i].i_pitch * pic->p[i].i_lines; frame->buf[i] = av_buffer_create(data, size, lavc_dr_ReleaseFrame, ref, 0); if (unlikely(frame->buf[i] == NULL)) { lavc_dr_ReleaseFrame(ref, data); goto error; } } decoder_UnlinkPicture(dec, pic); (void) flags; return pic; error: for (unsigned i = 0; frame->buf[i] != NULL; i++) av_buffer_unref(&frame->buf[i]); no_dr: decoder_DeletePicture(dec, pic); return NULL; } /** * Callback used by libavcodec 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 lavc_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags) { decoder_t *dec = ctx->opaque; decoder_sys_t *sys = dec->p_sys; picture_t *pic; for (unsigned i = 0; i < AV_NUM_DATA_POINTERS; i++) { frame->data[i] = NULL; frame->linesize[i] = 0; frame->buf[i] = NULL; } if (sys->p_va != NULL) return lavc_va_GetFrame(ctx, frame, flags); frame->opaque = NULL; if (!sys->b_direct_rendering) return avcodec_default_get_buffer2(ctx, frame, flags); /* Some codecs set pix_fmt only after the 1st frame has been decoded, * so we need to check for direct rendering again. */ wait_mt(sys); pic = lavc_dr_GetFrame(ctx, frame, flags); if (pic == NULL) { if (sys->i_direct_rendering_used != 0) { msg_Warn(dec, "disabling direct rendering"); sys->i_direct_rendering_used = 0; } post_mt(sys); return avcodec_default_get_buffer2(ctx, frame, flags); } if (sys->i_direct_rendering_used != 1) { msg_Dbg(dec, "enabling direct rendering"); sys->i_direct_rendering_used = 1; } post_mt(sys); frame->opaque = pic; static_assert(PICTURE_PLANE_MAX <= AV_NUM_DATA_POINTERS, "Oops!"); for (unsigned i = 0; i < PICTURE_PLANE_MAX; i++) { frame->data[i] = pic->p[i].p_pixels; frame->linesize[i] = pic->p[i].i_pitch; } return 0; } #else static int ffmpeg_va_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; vlc_va_t *p_va = p_sys->p_va; /* hwaccel_context is not present in old ffmpeg version */ if( vlc_va_Setup( p_va, &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma, p_context->coded_width, p_context->coded_height ) ) { msg_Err( p_dec, "vlc_va_Setup failed" ); return -1; } if( vlc_va_Get( p_va, &p_ff_pic->opaque, &p_ff_pic->data[0] ) ) { msg_Err( p_dec, "vlc_va_Get failed" ); return -1; } p_ff_pic->data[3] = p_ff_pic->data[0]; p_ff_pic->type = FF_BUFFER_TYPE_USER; return 0; } static picture_t *ffmpeg_dr_GetFrameBuf(struct AVCodecContext *p_context) { decoder_t *p_dec = (decoder_t *)p_context->opaque; decoder_sys_t *p_sys = p_dec->p_sys; int i_width = p_context->width; int i_height = p_context->height; avcodec_align_dimensions( p_context, &i_width, &i_height ); picture_t *p_pic = NULL; if (GetVlcChroma(&p_dec->fmt_out.video, p_context->pix_fmt) != VLC_SUCCESS) goto no_dr; if (p_context->pix_fmt == PIX_FMT_PAL8) goto no_dr; p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma; p_pic = ffmpeg_NewPictBuf( p_dec, p_context ); if( !p_pic ) goto no_dr; if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width || p_pic->p[0].i_lines < i_height ) goto no_dr; for( int i = 0; i < p_pic->i_planes; i++ ) { unsigned i_align; switch( p_sys->i_codec_id ) { case AV_CODEC_ID_SVQ1: case AV_CODEC_ID_VP5: case AV_CODEC_ID_VP6: case AV_CODEC_ID_VP6F: case AV_CODEC_ID_VP6A: i_align = 16; break; default: i_align = i == 0 ? 16 : 8; break; } if( p_pic->p[i].i_pitch % i_align ) goto no_dr; if( (intptr_t)p_pic->p[i].p_pixels % i_align ) goto no_dr; } if( p_context->pix_fmt == PIX_FMT_YUV422P ) { 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 ) goto no_dr; } return p_pic; no_dr: if (p_pic) decoder_DeletePicture( p_dec, p_pic ); return NULL; } 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; /* */ p_ff_pic->opaque = NULL; #if ! LIBAVCODEC_VERSION_CHECK(54, 34, 0, 79, 101) p_ff_pic->pkt_pts = p_context->pkt ? p_context->pkt->pts : AV_NOPTS_VALUE; #endif if( p_sys->p_va ) return ffmpeg_va_GetFrameBuf(p_context, p_ff_pic); if( !p_sys->b_direct_rendering ) 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. */ picture_t *p_pic = ffmpeg_dr_GetFrameBuf(p_context); if (!p_pic) { 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 ); } 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; post_mt( p_sys ); 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; return 0; } 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->opaque, p_ff_pic->data[0] ); else if( p_ff_pic->opaque ) decoder_UnlinkPicture( p_dec, (picture_t*)p_ff_pic->opaque); else if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL ) /* 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 */ avcodec_default_release_buffer( p_context, p_ff_pic ); for( int i = 0; i < 4; i++ ) p_ff_pic->data[i] = NULL; } #endif 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 ); /* Enumerate available formats */ bool can_hwaccel = false; for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ ) { const AVPixFmtDescriptor *dsc = av_pix_fmt_desc_get(pi_fmt[i]); if (dsc == NULL) continue; bool hwaccel = (dsc->flags & AV_PIX_FMT_FLAG_HWACCEL) != 0; msg_Dbg( p_dec, "available %sware decoder output format %d (%s)", hwaccel ? "hard" : "soft", pi_fmt[i], dsc->name ); if (hwaccel) can_hwaccel = true; } if (!can_hwaccel) goto end; /* Profile and level information is needed now. * TODO: avoid code duplication with avcodec.c */ if( p_context->profile != FF_PROFILE_UNKNOWN) p_dec->fmt_in.i_profile = p_context->profile; if( p_context->level != FF_LEVEL_UNKNOWN) p_dec->fmt_in.i_level = p_context->level; p_va = vlc_va_New( VLC_OBJECT(p_dec), p_context, &p_dec->fmt_in ); if( p_va == NULL ) goto end; for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ ) { 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]; } vlc_va_Delete( p_va ); end: /* Fallback to default behaviour */ p_sys->p_va = NULL; return avcodec_default_get_format( p_context, pi_fmt ); }