1 /*****************************************************************************
2 * video.c: video decoder using the libavcodec library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
34 #include <vlc_avcodec.h>
38 #include <libavcodec/avcodec.h>
39 #include <libavutil/mem.h>
40 #include <libavutil/pixdesc.h>
45 /*****************************************************************************
46 * decoder_sys_t : decoder descriptor
47 *****************************************************************************/
50 AVCODEC_COMMON_MEMBERS
52 /* Video decoder specific part */
57 /* for frame skipping algo */
59 enum AVDiscard i_skip_frame;
61 /* how many decoded frames are late */
63 mtime_t i_late_frames_start;
65 /* for direct rendering */
66 bool b_direct_rendering;
67 int i_direct_rendering_used;
71 /* Hack to force display of still pictures */
87 #ifdef HAVE_AVCODEC_MT
88 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
89 # define post_mt(s) vlc_sem_post( &s->sem_mt )
95 /*****************************************************************************
97 *****************************************************************************/
98 static void ffmpeg_InitCodec ( decoder_t * );
99 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
100 #if LIBAVCODEC_VERSION_MAJOR >= 55
101 static int lavc_GetFrame(struct AVCodecContext *, AVFrame *, int);
103 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
104 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
106 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
107 const enum PixelFormat * );
108 static picture_t *DecodeVideo( decoder_t *, block_t ** );
110 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
112 uint8_t *p = (uint8_t*)&fcc;
113 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
116 /*****************************************************************************
118 *****************************************************************************/
120 /* Returns a new picture buffer */
121 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
122 AVCodecContext *p_context )
124 decoder_sys_t *p_sys = p_dec->p_sys;
125 int width = p_context->coded_width;
126 int height = p_context->coded_height;
128 if( p_sys->p_va == NULL )
130 int aligns[AV_NUM_DATA_POINTERS];
132 avcodec_align_dimensions2(p_context, &width, &height, aligns);
136 if( width == 0 || height == 0 || width > 8192 || height > 8192 )
138 msg_Err( p_dec, "Invalid frame size %dx%d.", width, height );
139 return NULL; /* invalid display size */
141 p_dec->fmt_out.video.i_width = width;
142 p_dec->fmt_out.video.i_height = height;
144 if( width != p_context->width || height != p_context->height )
146 p_dec->fmt_out.video.i_visible_width = p_context->width;
147 p_dec->fmt_out.video.i_visible_height = p_context->height;
151 p_dec->fmt_out.video.i_visible_width = width;
152 p_dec->fmt_out.video.i_visible_height = height;
155 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
157 /* we are doomed, but not really, because most codecs set their pix_fmt
159 * FIXME does it make sense here ? */
160 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
162 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
164 /* If an aspect-ratio was specified in the input format then force it */
165 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
167 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
168 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
172 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
173 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
175 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
177 p_dec->fmt_out.video.i_sar_num = 1;
178 p_dec->fmt_out.video.i_sar_den = 1;
182 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
183 p_dec->fmt_in.video.i_frame_rate_base > 0 )
185 p_dec->fmt_out.video.i_frame_rate =
186 p_dec->fmt_in.video.i_frame_rate;
187 p_dec->fmt_out.video.i_frame_rate_base =
188 p_dec->fmt_in.video.i_frame_rate_base;
190 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
192 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
193 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num * __MAX( p_context->ticks_per_frame, 1 );
196 return decoder_NewPicture( p_dec );
199 static int OpenVideoCodec( decoder_t *p_dec )
201 decoder_sys_t *p_sys = p_dec->p_sys;
203 if( p_sys->p_context->extradata_size <= 0 )
205 if( p_sys->p_codec->id == AV_CODEC_ID_VC1 ||
206 p_sys->p_codec->id == AV_CODEC_ID_THEORA )
208 msg_Warn( p_dec, "waiting for extra data for codec %s",
209 p_sys->p_codec->name );
214 p_sys->p_context->width = p_dec->fmt_in.video.i_visible_width;
215 p_sys->p_context->height = p_dec->fmt_in.video.i_visible_height;
216 if (p_sys->p_context->width == 0)
217 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
218 else if (p_sys->p_context->width != p_dec->fmt_in.video.i_width)
219 p_sys->p_context->coded_width = p_dec->fmt_in.video.i_width;
220 if (p_sys->p_context->height == 0)
221 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
222 else if (p_sys->p_context->height != p_dec->fmt_in.video.i_height)
223 p_sys->p_context->coded_height = p_dec->fmt_in.video.i_height;
224 p_sys->p_context->bits_per_coded_sample = p_dec->fmt_in.video.i_bits_per_pixel;
226 int ret = ffmpeg_OpenCodec( p_dec );
230 #ifdef HAVE_AVCODEC_MT
231 switch( p_sys->p_context->active_thread_type )
233 case FF_THREAD_FRAME:
234 msg_Dbg( p_dec, "using frame thread mode with %d threads",
235 p_sys->p_context->thread_count );
237 case FF_THREAD_SLICE:
238 msg_Dbg( p_dec, "using slice thread mode with %d threads",
239 p_sys->p_context->thread_count );
242 if( p_sys->p_context->thread_count > 1 )
243 msg_Warn( p_dec, "failed to enable threaded decoding" );
246 msg_Warn( p_dec, "using unknown thread mode with %d threads",
247 p_sys->p_context->thread_count );
254 /*****************************************************************************
255 * InitVideo: initialize the video decoder
256 *****************************************************************************
257 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
258 * opened (done after the first decoded frame).
259 *****************************************************************************/
260 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
261 const AVCodec *p_codec )
263 decoder_sys_t *p_sys;
266 /* Allocate the memory needed to store the decoder's structure */
267 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
270 p_sys->p_context = p_context;
271 p_sys->p_codec = p_codec;
272 p_sys->p_ff_pic = avcodec_alloc_frame();
273 p_sys->b_delayed_open = true;
275 vlc_sem_init( &p_sys->sem_mt, 0 );
277 /* ***** Fill p_context with init values ***** */
278 p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
280 /* ***** Get configuration of ffmpeg plugin ***** */
281 p_context->workaround_bugs =
282 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
283 p_context->err_recognition =
284 var_InheritInteger( p_dec, "avcodec-error-resilience" );
286 if( var_CreateGetBool( p_dec, "grayscale" ) )
287 p_context->flags |= CODEC_FLAG_GRAY;
289 /* ***** Output always the frames ***** */
290 #if LIBAVCODEC_VERSION_CHECK(55, 23, 1, 40, 101)
291 p_context->flags |= CODEC_FLAG_OUTPUT_CORRUPT;
294 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
295 if( i_val >= 4 ) p_context->skip_loop_filter = AVDISCARD_ALL;
296 else if( i_val == 3 ) p_context->skip_loop_filter = AVDISCARD_NONKEY;
297 else if( i_val == 2 ) p_context->skip_loop_filter = AVDISCARD_BIDIR;
298 else if( i_val == 1 ) p_context->skip_loop_filter = AVDISCARD_NONREF;
300 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
301 p_context->flags2 |= CODEC_FLAG2_FAST;
303 /* ***** libavcodec frame skipping ***** */
304 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
306 i_val = var_CreateGetInteger( p_dec, "avcodec-skip-frame" );
307 if( i_val >= 4 ) p_context->skip_frame = AVDISCARD_ALL;
308 else if( i_val == 3 ) p_context->skip_frame = AVDISCARD_NONKEY;
309 else if( i_val == 2 ) p_context->skip_frame = AVDISCARD_BIDIR;
310 else if( i_val == 1 ) p_context->skip_frame = AVDISCARD_NONREF;
311 else if( i_val == -1 ) p_context->skip_frame = AVDISCARD_NONE;
312 else p_context->skip_frame = AVDISCARD_DEFAULT;
313 p_sys->i_skip_frame = p_context->skip_frame;
315 i_val = var_CreateGetInteger( p_dec, "avcodec-skip-idct" );
316 if( i_val >= 4 ) p_context->skip_idct = AVDISCARD_ALL;
317 else if( i_val == 3 ) p_context->skip_idct = AVDISCARD_NONKEY;
318 else if( i_val == 2 ) p_context->skip_idct = AVDISCARD_BIDIR;
319 else if( i_val == 1 ) p_context->skip_idct = AVDISCARD_NONREF;
320 else if( i_val == -1 ) p_context->skip_idct = AVDISCARD_NONE;
321 else p_context->skip_idct = AVDISCARD_DEFAULT;
323 /* ***** libavcodec direct rendering ***** */
324 p_sys->b_direct_rendering = false;
325 p_sys->i_direct_rendering_used = -1;
326 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
327 (p_codec->capabilities & CODEC_CAP_DR1) &&
328 /* No idea why ... but this fixes flickering on some TSCC streams */
329 p_sys->p_codec->id != AV_CODEC_ID_TSCC &&
330 p_sys->p_codec->id != AV_CODEC_ID_CSCD &&
331 p_sys->p_codec->id != AV_CODEC_ID_CINEPAK )
333 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
334 * so we need to do another check in ffmpeg_GetFrameBuf() */
335 p_sys->b_direct_rendering = true;
338 /* libavcodec doesn't properly release old pictures when frames are skipped */
339 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
340 if( p_sys->b_direct_rendering )
342 msg_Dbg( p_dec, "trying to use direct rendering" );
343 p_context->flags |= CODEC_FLAG_EMU_EDGE;
347 msg_Dbg( p_dec, "direct rendering is disabled" );
350 p_context->get_format = ffmpeg_GetFormat;
351 /* Always use our get_buffer wrapper so we can calculate the
353 #if LIBAVCODEC_VERSION_MAJOR >= 55
354 p_context->get_buffer2 = lavc_GetFrame;
356 p_context->get_buffer = ffmpeg_GetFrameBuf;
357 p_context->reget_buffer = avcodec_default_reget_buffer;
358 p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
360 p_context->opaque = p_dec;
362 #ifdef HAVE_AVCODEC_MT
363 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
364 if( i_thread_count <= 0 )
366 i_thread_count = vlc_GetCPUCount();
367 if( i_thread_count > 1 )
370 //FIXME: take in count the decoding time
371 i_thread_count = __MIN( i_thread_count, 4 );
373 i_thread_count = __MIN( i_thread_count, 16 );
374 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
375 p_context->thread_count = i_thread_count;
376 p_context->thread_safe_callbacks = true;
378 switch( p_codec->id )
380 case AV_CODEC_ID_MPEG4:
381 case AV_CODEC_ID_H263:
382 p_context->thread_type = 0;
384 case AV_CODEC_ID_MPEG1VIDEO:
385 case AV_CODEC_ID_MPEG2VIDEO:
386 p_context->thread_type &= ~FF_THREAD_SLICE;
388 # if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0))
389 case AV_CODEC_ID_H264:
390 case AV_CODEC_ID_VC1:
391 case AV_CODEC_ID_WMV3:
392 p_context->thread_type &= ~FF_THREAD_FRAME;
398 /* Workaround: frame multithreading is not compatible with
399 * DXVA2. When a frame is being copied to host memory, the frame
400 * is locked and cannot be used as a reference frame
401 * simultaneously and thus decoding fails for some frames. This
402 * causes major image corruption. */
404 char *avcodec_hw = var_InheritString( p_dec, "avcodec-hw" );
405 if( avcodec_hw == NULL || strcasecmp( avcodec_hw, "none" ) )
407 msg_Warn( p_dec, "threaded frame decoding is not compatible with DXVA2, disabled" );
408 p_context->thread_type &= ~FF_THREAD_FRAME;
413 if( p_context->thread_type & FF_THREAD_FRAME )
414 p_dec->i_extra_picture_buffers = 2 * p_context->thread_count;
417 /* ***** misc init ***** */
418 p_sys->i_pts = VLC_TS_INVALID;
419 p_sys->b_has_b_frames = false;
420 p_sys->b_first_frame = true;
421 p_sys->b_flush = false;
422 p_sys->i_late_frames = 0;
424 /* Set output properties */
425 p_dec->fmt_out.i_cat = VIDEO_ES;
426 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
428 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
429 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
431 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
433 p_dec->fmt_out.video.orientation = p_dec->fmt_in.video.orientation;
435 if( p_dec->fmt_in.video.p_palette ) {
436 p_sys->palette_sent = false;
437 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
438 if( p_dec->fmt_out.video.p_palette )
439 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
441 p_sys->palette_sent = true;
443 /* ***** init this codec with special data ***** */
444 ffmpeg_InitCodec( p_dec );
446 /* ***** Open the codec ***** */
447 if( OpenVideoCodec( p_dec ) < 0 )
449 avcodec_free_frame( &p_sys->p_ff_pic );
450 vlc_sem_destroy( &p_sys->sem_mt );
455 p_dec->pf_decode_video = DecodeVideo;
459 /*****************************************************************************
460 * DecodeVideo: Called to decode one or more frames
461 *****************************************************************************/
462 static picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
464 decoder_sys_t *p_sys = p_dec->p_sys;
465 AVCodecContext *p_context = p_sys->p_context;
472 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
474 ffmpeg_InitCodec( p_dec );
475 if( p_sys->b_delayed_open )
476 OpenVideoCodec( p_dec );
480 if(!p_block && !(p_sys->p_codec->capabilities & CODEC_CAP_DELAY) )
483 if( p_sys->b_delayed_open )
486 block_Release( p_block );
492 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
494 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
496 p_sys->i_late_frames = 0;
499 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
500 avcodec_flush_buffers( p_context );
503 block_Release( p_block );
507 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
509 /* Do not care about late frames when prerolling
510 * TODO avoid decoding of non reference frame
511 * (ie all B except for H264 where it depends only on nal_ref_idc) */
512 p_sys->i_late_frames = 0;
516 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
517 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
519 if( p_sys->i_pts > VLC_TS_INVALID )
521 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
524 block_Release( p_block );
525 p_sys->i_late_frames--;
526 msg_Err( p_dec, "more than 5 seconds of late video -> "
527 "dropping frame (computer too slow ?)" );
531 /* A good idea could be to decode all I pictures and see for the other */
532 if( !p_dec->b_pace_control &&
534 (p_sys->i_late_frames > 4) )
537 if( p_sys->i_late_frames < 12 )
539 p_context->skip_frame =
540 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
541 AVDISCARD_NONREF : p_sys->i_skip_frame;
545 /* picture too late, won't decode
546 * but break picture until a new I, and for mpeg4 ...*/
547 p_sys->i_late_frames--; /* needed else it will never be decrease */
549 block_Release( p_block );
550 msg_Warn( p_dec, "More than 4 late frames, dropping frame" );
556 if( p_sys->b_hurry_up )
557 p_context->skip_frame = p_sys->i_skip_frame;
558 if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
564 if( p_context->width <= 0 || p_context->height <= 0 )
566 if( p_sys->b_hurry_up )
567 p_context->skip_frame = p_sys->i_skip_frame;
569 else if( !b_drawpicture )
571 /* It creates broken picture
572 * FIXME either our parser or ffmpeg is broken */
574 if( p_sys->b_hurry_up )
575 p_context->skip_frame = __MAX( p_context->skip_frame,
581 * Do the actual decoding now */
583 /* Don't forget that libavcodec requires a little more bytes
584 * that the real frame size */
585 if( p_block && p_block->i_buffer > 0 )
587 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
589 p_block = block_Realloc( p_block, 0,
590 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
593 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
595 memset( p_block->p_buffer + p_block->i_buffer, 0,
596 FF_INPUT_BUFFER_PADDING_SIZE );
599 while( !p_block || p_block->i_buffer > 0 || p_sys->b_flush )
601 int i_used, b_gotpicture;
607 av_init_packet( &pkt );
610 pkt.data = p_block->p_buffer;
611 pkt.size = p_block->i_buffer;
612 pkt.pts = p_block->i_pts;
613 pkt.dts = p_block->i_dts;
617 /* Return delayed frames if codec has CODEC_CAP_DELAY */
622 if( !p_sys->palette_sent )
624 uint8_t *pal = av_packet_new_side_data(&pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
626 memcpy(pal, p_dec->fmt_in.video.p_palette->palette, AVPALETTE_SIZE);
627 p_sys->palette_sent = true;
631 /* Make sure we don't reuse the same timestamps twice */
635 p_block->i_dts = VLC_TS_INVALID;
638 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
639 &b_gotpicture, &pkt );
640 av_free_packet( &pkt );
645 p_sys->b_first_frame = true;
649 if( p_block->i_buffer <= 0 )
650 p_sys->b_flush = false;
655 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
657 block_Release( p_block );
660 else if( (unsigned)i_used > p_block->i_buffer ||
661 p_context->thread_count > 1 )
663 i_used = p_block->i_buffer;
667 p_block->i_buffer -= i_used;
668 p_block->p_buffer += i_used;
671 /* Nothing to display */
674 if( i_used == 0 ) break;
678 /* Sanity check (seems to be needed for some streams) */
679 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
681 p_sys->b_has_b_frames = true;
684 /* Compute the PTS */
686 p_sys->p_ff_pic->pkt_pts;
687 if (i_pts <= VLC_TS_INVALID)
688 i_pts = p_sys->p_ff_pic->pkt_dts;
690 if( i_pts <= VLC_TS_INVALID )
691 i_pts = p_sys->i_pts;
693 /* Interpolate the next PTS */
694 if( i_pts > VLC_TS_INVALID )
695 p_sys->i_pts = i_pts;
696 if( p_sys->i_pts > VLC_TS_INVALID )
698 /* interpolate the next PTS */
699 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
700 p_dec->fmt_in.video.i_frame_rate_base > 0 )
702 p_sys->i_pts += CLOCK_FREQ *
703 (2 + p_sys->p_ff_pic->repeat_pict) *
704 p_dec->fmt_in.video.i_frame_rate_base /
705 (2 * p_dec->fmt_in.video.i_frame_rate);
707 else if( p_context->time_base.den > 0 )
709 int i_tick = p_context->ticks_per_frame;
713 p_sys->i_pts += CLOCK_FREQ *
714 (2 + p_sys->p_ff_pic->repeat_pict) *
715 i_tick * p_context->time_base.num /
716 (2 * p_context->time_base.den);
720 /* Update frame late count (except when doing preroll) */
721 mtime_t i_display_date = 0;
722 if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
723 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
725 if( i_display_date > 0 && i_display_date <= mdate() )
727 p_sys->i_late_frames++;
728 if( p_sys->i_late_frames == 1 )
729 p_sys->i_late_frames_start = mdate();
733 p_sys->i_late_frames = 0;
736 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
739 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
741 /* Get a new picture */
742 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
746 block_Release( p_block );
750 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
752 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
756 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
757 decoder_LinkPicture( p_dec, p_pic );
760 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
762 /* Fetch again the aspect ratio in case it changed */
763 p_dec->fmt_out.video.i_sar_num
764 = p_context->sample_aspect_ratio.num;
765 p_dec->fmt_out.video.i_sar_den
766 = p_context->sample_aspect_ratio.den;
768 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
770 p_dec->fmt_out.video.i_sar_num = 1;
771 p_dec->fmt_out.video.i_sar_den = 1;
775 /* Send decoded frame to vout */
776 if( i_pts > VLC_TS_INVALID)
780 if( p_sys->b_first_frame )
782 /* Hack to force display of still pictures */
783 p_sys->b_first_frame = false;
784 p_pic->b_force = true;
787 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
788 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
789 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
795 decoder_DeletePicture( p_dec, p_pic );
800 block_Release( p_block );
804 /*****************************************************************************
805 * EndVideo: decoder destruction
806 *****************************************************************************
807 * This function is called when the thread ends after a successful
809 *****************************************************************************/
810 void EndVideoDec( decoder_t *p_dec )
812 decoder_sys_t *p_sys = p_dec->p_sys;
816 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
817 if( p_sys->p_context->codec )
818 avcodec_flush_buffers( p_sys->p_context );
822 if( p_sys->p_ff_pic )
823 avcodec_free_frame( &p_sys->p_ff_pic );
826 vlc_va_Delete( p_sys->p_va );
828 vlc_sem_destroy( &p_sys->sem_mt );
831 /*****************************************************************************
832 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
833 *****************************************************************************/
834 static void ffmpeg_InitCodec( decoder_t *p_dec )
836 decoder_sys_t *p_sys = p_dec->p_sys;
837 int i_size = p_dec->fmt_in.i_extra;
839 if( !i_size ) return;
841 if( p_sys->p_codec->id == AV_CODEC_ID_SVQ3 )
845 p_sys->p_context->extradata_size = i_size + 12;
846 p = p_sys->p_context->extradata =
847 av_malloc( p_sys->p_context->extradata_size +
848 FF_INPUT_BUFFER_PADDING_SIZE );
852 memcpy( &p[0], "SVQ3", 4 );
853 memset( &p[4], 0, 8 );
854 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
856 /* Now remove all atoms before the SMI one */
857 if( p_sys->p_context->extradata_size > 0x5a &&
858 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
860 uint8_t *psz = &p[0x52];
862 while( psz < &p[p_sys->p_context->extradata_size - 8] )
864 int i_size = GetDWBE( psz );
867 /* FIXME handle 1 as long size */
870 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
872 memmove( &p[0x52], psz,
873 &p[p_sys->p_context->extradata_size] - psz );
883 p_sys->p_context->extradata_size = i_size;
884 p_sys->p_context->extradata =
885 av_malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
886 if( p_sys->p_context->extradata )
888 memcpy( p_sys->p_context->extradata,
889 p_dec->fmt_in.p_extra, i_size );
890 memset( p_sys->p_context->extradata + i_size,
891 0, FF_INPUT_BUFFER_PADDING_SIZE );
896 /*****************************************************************************
897 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
898 * picture_t structure (when not in direct rendering mode).
899 *****************************************************************************/
900 static void ffmpeg_CopyPicture( decoder_t *p_dec,
901 picture_t *p_pic, AVFrame *p_ff_pic )
903 decoder_sys_t *p_sys = p_dec->p_sys;
907 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic->opaque,
910 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
912 int i_plane, i_size, i_line;
913 uint8_t *p_dst, *p_src;
914 int i_src_stride, i_dst_stride;
916 if( p_sys->p_context->pix_fmt == PIX_FMT_PAL8 )
918 if( !p_pic->format.p_palette )
919 p_pic->format.p_palette = calloc( 1, sizeof(video_palette_t) );
921 if( p_pic->format.p_palette )
923 p_pic->format.p_palette->i_entries = AVPALETTE_COUNT;
924 memcpy( p_pic->format.p_palette->palette, p_ff_pic->data[1], AVPALETTE_SIZE );
928 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
930 p_src = p_ff_pic->data[i_plane];
931 p_dst = p_pic->p[i_plane].p_pixels;
932 i_src_stride = p_ff_pic->linesize[i_plane];
933 i_dst_stride = p_pic->p[i_plane].i_pitch;
935 i_size = __MIN( i_src_stride, i_dst_stride );
936 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
939 memcpy( p_dst, p_src, i_size );
940 p_src += i_src_stride;
941 p_dst += i_dst_stride;
947 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
948 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
949 p_sys->p_context->pix_fmt, name ? name : "unknown" );
954 #if LIBAVCODEC_VERSION_MAJOR >= 55
955 static int lavc_va_GetFrame(struct AVCodecContext *ctx, AVFrame *frame,
958 decoder_t *dec = ctx->opaque;
959 decoder_sys_t *sys = dec->p_sys;
960 vlc_va_t *va = sys->p_va;
962 if (vlc_va_Setup(va, &ctx->hwaccel_context, &dec->fmt_out.video.i_chroma,
963 ctx->coded_width, ctx->coded_height))
965 msg_Err(dec, "hardware acceleration setup failed");
968 if (vlc_va_Get(va, &frame->opaque, &frame->data[0]))
970 msg_Err(dec, "hardware acceleration picture allocation failed");
973 /* data[0] must be non-NULL for libavcodec internal checks.
974 * data[3] actually contains the format-specific surface handle. */
975 frame->data[3] = frame->data[0];
977 frame->buf[0] = av_buffer_create(frame->data[0], 0, va->release,
979 if (unlikely(frame->buf[0] == NULL))
981 vlc_va_Release(va, frame->opaque, frame->data[0]);
984 assert(frame->data[0] != NULL);
995 static void lavc_dr_ReleaseFrame(void *opaque, uint8_t *data)
997 lavc_pic_ref_t *ref = opaque;
999 decoder_UnlinkPicture(ref->decoder, ref->picture);
1004 static picture_t *lavc_dr_GetFrame(struct AVCodecContext *ctx,
1005 AVFrame *frame, int flags)
1007 decoder_t *dec = (decoder_t *)ctx->opaque;
1008 decoder_sys_t *sys = dec->p_sys;
1010 if (GetVlcChroma(&dec->fmt_out.video, ctx->pix_fmt) != VLC_SUCCESS)
1012 dec->fmt_out.i_codec = dec->fmt_out.video.i_chroma;
1013 if (ctx->pix_fmt == PIX_FMT_PAL8)
1016 int width = frame->width;
1017 int height = frame->height;
1018 int aligns[AV_NUM_DATA_POINTERS];
1020 avcodec_align_dimensions2(ctx, &width, &height, aligns);
1022 picture_t *pic = ffmpeg_NewPictBuf(dec, ctx);
1026 /* Check that the picture is suitable for libavcodec */
1027 if (pic->p[0].i_pitch < width * pic->p[0].i_pixel_pitch)
1029 if (sys->i_direct_rendering_used != 0)
1030 msg_Dbg(dec, "plane 0: pitch too small (%d/%d*%d)",
1031 pic->p[0].i_pitch, width, pic->p[0].i_pixel_pitch);
1035 if (pic->p[0].i_lines < height)
1037 if (sys->i_direct_rendering_used != 0)
1038 msg_Dbg(dec, "plane 0: lines too few (%d/%d)",
1039 pic->p[0].i_lines, height);
1043 for (int i = 0; i < pic->i_planes; i++)
1045 if (pic->p[i].i_pitch % aligns[i])
1047 if (sys->i_direct_rendering_used != 0)
1048 msg_Dbg(dec, "plane %d: pitch not aligned (%d%%%d)",
1049 i, pic->p[i].i_pitch, aligns[i]);
1052 if (((uintptr_t)pic->p[i].p_pixels) % aligns[i])
1054 if (sys->i_direct_rendering_used != 0)
1055 msg_Warn(dec, "plane %d not aligned", i);
1060 /* Allocate buffer references */
1061 for (int i = 0; i < pic->i_planes; i++)
1063 lavc_pic_ref_t *ref = malloc(sizeof (*ref));
1068 decoder_LinkPicture(dec, pic);
1070 uint8_t *data = pic->p[i].p_pixels;
1071 int size = pic->p[i].i_pitch * pic->p[i].i_lines;
1073 frame->buf[i] = av_buffer_create(data, size, lavc_dr_ReleaseFrame,
1075 if (unlikely(frame->buf[i] == NULL))
1077 lavc_dr_ReleaseFrame(ref, data);
1081 decoder_UnlinkPicture(dec, pic);
1085 for (unsigned i = 0; frame->buf[i] != NULL; i++)
1086 av_buffer_unref(&frame->buf[i]);
1088 decoder_DeletePicture(dec, pic);
1093 * Callback used by libavcodec to get a frame buffer.
1095 * It is used for direct rendering as well as to get the right PTS for each
1096 * decoded picture (even in indirect rendering mode).
1098 static int lavc_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags)
1100 decoder_t *dec = ctx->opaque;
1101 decoder_sys_t *sys = dec->p_sys;
1104 for (unsigned i = 0; i < AV_NUM_DATA_POINTERS; i++)
1106 frame->data[i] = NULL;
1107 frame->linesize[i] = 0;
1108 frame->buf[i] = NULL;
1111 if (sys->p_va != NULL)
1112 return lavc_va_GetFrame(ctx, frame, flags);
1114 frame->opaque = NULL;
1115 if (!sys->b_direct_rendering)
1116 return avcodec_default_get_buffer2(ctx, frame, flags);
1118 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1119 * so we need to check for direct rendering again. */
1121 pic = lavc_dr_GetFrame(ctx, frame, flags);
1124 if (sys->i_direct_rendering_used != 0)
1126 msg_Warn(dec, "disabling direct rendering");
1127 sys->i_direct_rendering_used = 0;
1130 return avcodec_default_get_buffer2(ctx, frame, flags);
1133 if (sys->i_direct_rendering_used != 1)
1135 msg_Dbg(dec, "enabling direct rendering");
1136 sys->i_direct_rendering_used = 1;
1140 frame->opaque = pic;
1141 static_assert(PICTURE_PLANE_MAX <= AV_NUM_DATA_POINTERS, "Oops!");
1142 for (unsigned i = 0; i < PICTURE_PLANE_MAX; i++)
1144 frame->data[i] = pic->p[i].p_pixels;
1145 frame->linesize[i] = pic->p[i].i_pitch;
1150 static int ffmpeg_va_GetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1152 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1153 decoder_sys_t *p_sys = p_dec->p_sys;
1154 vlc_va_t *p_va = p_sys->p_va;
1156 /* hwaccel_context is not present in old ffmpeg version */
1157 if( vlc_va_Setup( p_va,
1158 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
1159 p_context->coded_width, p_context->coded_height ) )
1161 msg_Err( p_dec, "vlc_va_Setup failed" );
1165 if( vlc_va_Get( p_va, &p_ff_pic->opaque, &p_ff_pic->data[0] ) )
1167 msg_Err( p_dec, "vlc_va_Get failed" );
1171 p_ff_pic->data[3] = p_ff_pic->data[0];
1172 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1176 static picture_t *ffmpeg_dr_GetFrameBuf(struct AVCodecContext *p_context)
1178 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1180 int i_width = p_context->width;
1181 int i_height = p_context->height;
1182 avcodec_align_dimensions( p_context, &i_width, &i_height );
1184 picture_t *p_pic = NULL;
1185 if (GetVlcChroma(&p_dec->fmt_out.video, p_context->pix_fmt) != VLC_SUCCESS)
1188 if (p_context->pix_fmt == PIX_FMT_PAL8)
1191 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1193 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1197 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1198 p_pic->p[0].i_lines < i_height )
1201 for( int i = 0; i < p_pic->i_planes; i++ )
1204 switch( p_context->codec_id )
1206 case AV_CODEC_ID_SVQ1:
1207 case AV_CODEC_ID_VP5:
1208 case AV_CODEC_ID_VP6:
1209 case AV_CODEC_ID_VP6F:
1210 case AV_CODEC_ID_VP6A:
1214 i_align = i == 0 ? 16 : 8;
1217 if( p_pic->p[i].i_pitch % i_align )
1219 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1223 if( p_context->pix_fmt == PIX_FMT_YUV422P )
1225 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1226 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1234 decoder_DeletePicture( p_dec, p_pic );
1239 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
1242 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1243 decoder_sys_t *p_sys = p_dec->p_sys;
1246 p_ff_pic->opaque = NULL;
1247 #if ! LIBAVCODEC_VERSION_CHECK(54, 34, 0, 79, 101)
1248 p_ff_pic->pkt_pts = p_context->pkt ? p_context->pkt->pts : AV_NOPTS_VALUE;
1252 return ffmpeg_va_GetFrameBuf(p_context, p_ff_pic);
1254 if( !p_sys->b_direct_rendering )
1255 return avcodec_default_get_buffer( p_context, p_ff_pic );
1258 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1259 * so we need to check for direct rendering again. */
1261 picture_t *p_pic = ffmpeg_dr_GetFrameBuf(p_context);
1263 if( p_sys->i_direct_rendering_used != 0 )
1265 msg_Warn( p_dec, "disabling direct rendering" );
1266 p_sys->i_direct_rendering_used = 0;
1270 return avcodec_default_get_buffer( p_context, p_ff_pic );
1273 if( p_sys->i_direct_rendering_used != 1 ) {
1274 msg_Dbg( p_dec, "using direct rendering" );
1275 p_sys->i_direct_rendering_used = 1;
1278 p_context->draw_horiz_band = NULL;
1281 p_ff_pic->opaque = (void*)p_pic;
1282 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1283 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1284 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1285 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1286 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1288 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1289 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1290 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1291 p_ff_pic->linesize[3] = 0;
1296 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1299 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1300 decoder_sys_t *p_sys = p_dec->p_sys;
1303 vlc_va_Release( p_sys->p_va, p_ff_pic->opaque, p_ff_pic->data[0] );
1304 else if( p_ff_pic->opaque )
1305 decoder_UnlinkPicture( p_dec, (picture_t*)p_ff_pic->opaque);
1306 else if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1307 /* We can end up here without the AVFrame being allocated by
1308 * avcodec_default_get_buffer() if VA is used and the frame is
1309 * released when the decoder is closed
1311 avcodec_default_release_buffer( p_context, p_ff_pic );
1313 for( int i = 0; i < 4; i++ )
1314 p_ff_pic->data[i] = NULL;
1318 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1319 const enum PixelFormat *pi_fmt )
1321 decoder_t *p_dec = p_context->opaque;
1322 decoder_sys_t *p_sys = p_dec->p_sys;
1323 vlc_va_t *p_va = p_sys->p_va;
1326 vlc_va_Delete( p_va );
1328 /* Enumerate available formats */
1329 bool can_hwaccel = false;
1330 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1332 const AVPixFmtDescriptor *dsc = av_pix_fmt_desc_get(pi_fmt[i]);
1335 bool hwaccel = (dsc->flags & AV_PIX_FMT_FLAG_HWACCEL) != 0;
1337 msg_Dbg( p_dec, "available %sware decoder output format %d (%s)",
1338 hwaccel ? "hard" : "soft", pi_fmt[i], dsc->name );
1346 /* Profile and level information is needed now.
1347 * TODO: avoid code duplication with avcodec.c */
1348 if( p_context->profile != FF_PROFILE_UNKNOWN)
1349 p_dec->fmt_in.i_profile = p_context->profile;
1350 if( p_context->level != FF_LEVEL_UNKNOWN)
1351 p_dec->fmt_in.i_level = p_context->level;
1353 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_context, &p_dec->fmt_in );
1357 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1359 if( p_va->pix_fmt != pi_fmt[i] )
1362 /* We try to call vlc_va_Setup when possible to detect errors when
1363 * possible (later is too late) */
1364 if( p_context->width > 0 && p_context->height > 0
1365 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1366 &p_dec->fmt_out.video.i_chroma,
1367 p_context->width, p_context->height ) )
1369 msg_Err( p_dec, "acceleration setup failure" );
1373 if( p_va->description )
1374 msg_Info( p_dec, "Using %s for hardware decoding.",
1375 p_va->description );
1377 /* FIXME this will disable direct rendering
1378 * even if a new pixel format is renegotiated
1380 p_sys->b_direct_rendering = false;
1382 p_context->draw_horiz_band = NULL;
1386 vlc_va_Delete( p_va );
1389 /* Fallback to default behaviour */
1391 return avcodec_default_get_format( p_context, pi_fmt );