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->i_codec_id == AV_CODEC_ID_VC1 ||
206 p_sys->i_codec_id == AV_CODEC_ID_THEORA )
208 msg_Warn( p_dec, "waiting for extra data for codec %s",
209 p_sys->psz_namecodec );
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, int i_codec_id, const char *psz_namecodec )
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_context->codec_type = AVMEDIA_TYPE_VIDEO;
271 p_context->codec_id = i_codec_id;
272 p_sys->p_context = p_context;
273 p_sys->p_codec = p_codec;
274 p_sys->i_codec_id = i_codec_id;
275 p_sys->psz_namecodec = psz_namecodec;
276 p_sys->p_ff_pic = avcodec_alloc_frame();
277 p_sys->b_delayed_open = true;
279 vlc_sem_init( &p_sys->sem_mt, 0 );
281 /* ***** Fill p_context with init values ***** */
282 p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
284 /* ***** Get configuration of ffmpeg plugin ***** */
285 p_context->workaround_bugs =
286 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
287 p_context->err_recognition =
288 var_InheritInteger( p_dec, "avcodec-error-resilience" );
290 if( var_CreateGetBool( p_dec, "grayscale" ) )
291 p_context->flags |= CODEC_FLAG_GRAY;
293 /* ***** Output always the frames ***** */
294 #if LIBAVCODEC_VERSION_CHECK(55, 23, 1, 40, 101)
295 p_context->flags |= CODEC_FLAG_OUTPUT_CORRUPT;
298 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
299 if( i_val >= 4 ) p_context->skip_loop_filter = AVDISCARD_ALL;
300 else if( i_val == 3 ) p_context->skip_loop_filter = AVDISCARD_NONKEY;
301 else if( i_val == 2 ) p_context->skip_loop_filter = AVDISCARD_BIDIR;
302 else if( i_val == 1 ) p_context->skip_loop_filter = AVDISCARD_NONREF;
304 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
305 p_context->flags2 |= CODEC_FLAG2_FAST;
307 /* ***** libavcodec frame skipping ***** */
308 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
310 i_val = var_CreateGetInteger( p_dec, "avcodec-skip-frame" );
311 if( i_val >= 4 ) p_context->skip_frame = AVDISCARD_ALL;
312 else if( i_val == 3 ) p_context->skip_frame = AVDISCARD_NONKEY;
313 else if( i_val == 2 ) p_context->skip_frame = AVDISCARD_BIDIR;
314 else if( i_val == 1 ) p_context->skip_frame = AVDISCARD_NONREF;
315 else if( i_val == -1 ) p_context->skip_frame = AVDISCARD_NONE;
316 else p_context->skip_frame = AVDISCARD_DEFAULT;
317 p_sys->i_skip_frame = p_context->skip_frame;
319 i_val = var_CreateGetInteger( p_dec, "avcodec-skip-idct" );
320 if( i_val >= 4 ) p_context->skip_idct = AVDISCARD_ALL;
321 else if( i_val == 3 ) p_context->skip_idct = AVDISCARD_NONKEY;
322 else if( i_val == 2 ) p_context->skip_idct = AVDISCARD_BIDIR;
323 else if( i_val == 1 ) p_context->skip_idct = AVDISCARD_NONREF;
324 else if( i_val == -1 ) p_context->skip_idct = AVDISCARD_NONE;
325 else p_context->skip_idct = AVDISCARD_DEFAULT;
327 /* ***** libavcodec direct rendering ***** */
328 p_sys->b_direct_rendering = false;
329 p_sys->i_direct_rendering_used = -1;
330 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
331 (p_codec->capabilities & CODEC_CAP_DR1) &&
332 /* No idea why ... but this fixes flickering on some TSCC streams */
333 p_sys->i_codec_id != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
334 p_sys->i_codec_id != AV_CODEC_ID_CINEPAK )
336 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
337 * so we need to do another check in ffmpeg_GetFrameBuf() */
338 p_sys->b_direct_rendering = true;
341 /* libavcodec doesn't properly release old pictures when frames are skipped */
342 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
343 if( p_sys->b_direct_rendering )
345 msg_Dbg( p_dec, "trying to use direct rendering" );
346 p_context->flags |= CODEC_FLAG_EMU_EDGE;
350 msg_Dbg( p_dec, "direct rendering is disabled" );
353 p_context->get_format = ffmpeg_GetFormat;
354 /* Always use our get_buffer wrapper so we can calculate the
356 #if LIBAVCODEC_VERSION_MAJOR >= 55
357 p_context->get_buffer2 = lavc_GetFrame;
359 p_context->get_buffer = ffmpeg_GetFrameBuf;
360 p_context->reget_buffer = avcodec_default_reget_buffer;
361 p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
363 p_context->opaque = p_dec;
365 #ifdef HAVE_AVCODEC_MT
366 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
367 if( i_thread_count <= 0 )
369 i_thread_count = vlc_GetCPUCount();
370 if( i_thread_count > 1 )
373 //FIXME: take in count the decoding time
374 i_thread_count = __MIN( i_thread_count, 4 );
376 i_thread_count = __MIN( i_thread_count, 16 );
377 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
378 p_context->thread_count = i_thread_count;
379 p_context->thread_safe_callbacks = true;
383 case AV_CODEC_ID_MPEG4:
384 case AV_CODEC_ID_H263:
385 p_context->thread_type = 0;
387 case AV_CODEC_ID_MPEG1VIDEO:
388 case AV_CODEC_ID_MPEG2VIDEO:
389 p_context->thread_type &= ~FF_THREAD_SLICE;
391 # if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0))
392 case AV_CODEC_ID_H264:
393 case AV_CODEC_ID_VC1:
394 case AV_CODEC_ID_WMV3:
395 p_context->thread_type &= ~FF_THREAD_FRAME;
399 /* Workaround: frame multithreading is not compatible with
400 * DXVA2. When a frame is being copied to host memory, the frame
401 * is locked and cannot be used as a reference frame
402 * simultaneously and thus decoding fails for some frames. This
403 * causes major image corruption. */
405 char *avcodec_hw = var_InheritString( p_dec, "avcodec-hw" );
406 if( avcodec_hw == NULL || strcasecmp( avcodec_hw, "none" ) )
408 msg_Warn( p_dec, "threaded frame decoding is not compatible with DXVA2, disabled" );
409 p_context->thread_type &= ~FF_THREAD_FRAME;
414 if( p_context->thread_type & FF_THREAD_FRAME )
415 p_dec->i_extra_picture_buffers = 2 * p_context->thread_count;
418 /* ***** misc init ***** */
419 p_sys->i_pts = VLC_TS_INVALID;
420 p_sys->b_has_b_frames = false;
421 p_sys->b_first_frame = true;
422 p_sys->b_flush = false;
423 p_sys->i_late_frames = 0;
425 /* Set output properties */
426 p_dec->fmt_out.i_cat = VIDEO_ES;
427 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
429 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
430 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
432 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
434 p_dec->fmt_out.video.orientation = p_dec->fmt_in.video.orientation;
436 if( p_dec->fmt_in.video.p_palette ) {
437 p_sys->palette_sent = false;
438 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
439 if( p_dec->fmt_out.video.p_palette )
440 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
442 p_sys->palette_sent = true;
444 /* ***** init this codec with special data ***** */
445 ffmpeg_InitCodec( p_dec );
447 /* ***** Open the codec ***** */
448 if( OpenVideoCodec( p_dec ) < 0 )
450 avcodec_free_frame( &p_sys->p_ff_pic );
451 vlc_sem_destroy( &p_sys->sem_mt );
456 p_dec->pf_decode_video = DecodeVideo;
460 /*****************************************************************************
461 * DecodeVideo: Called to decode one or more frames
462 *****************************************************************************/
463 static picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
465 decoder_sys_t *p_sys = p_dec->p_sys;
466 AVCodecContext *p_context = p_sys->p_context;
473 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
475 ffmpeg_InitCodec( p_dec );
476 if( p_sys->b_delayed_open )
477 OpenVideoCodec( p_dec );
481 if(!p_block && !(p_sys->p_codec->capabilities & CODEC_CAP_DELAY) )
484 if( p_sys->b_delayed_open )
487 block_Release( p_block );
493 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
495 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
497 p_sys->i_late_frames = 0;
500 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
501 avcodec_flush_buffers( p_context );
504 block_Release( p_block );
508 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
510 /* Do not care about late frames when prerolling
511 * TODO avoid decoding of non reference frame
512 * (ie all B except for H264 where it depends only on nal_ref_idc) */
513 p_sys->i_late_frames = 0;
517 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
518 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
520 if( p_sys->i_pts > VLC_TS_INVALID )
522 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
525 block_Release( p_block );
526 p_sys->i_late_frames--;
527 msg_Err( p_dec, "more than 5 seconds of late video -> "
528 "dropping frame (computer too slow ?)" );
532 /* A good idea could be to decode all I pictures and see for the other */
533 if( !p_dec->b_pace_control &&
535 (p_sys->i_late_frames > 4) )
538 if( p_sys->i_late_frames < 12 )
540 p_context->skip_frame =
541 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
542 AVDISCARD_NONREF : p_sys->i_skip_frame;
546 /* picture too late, won't decode
547 * but break picture until a new I, and for mpeg4 ...*/
548 p_sys->i_late_frames--; /* needed else it will never be decrease */
550 block_Release( p_block );
551 msg_Warn( p_dec, "More than 4 late frames, dropping frame" );
557 if( p_sys->b_hurry_up )
558 p_context->skip_frame = p_sys->i_skip_frame;
559 if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
565 if( p_context->width <= 0 || p_context->height <= 0 )
567 if( p_sys->b_hurry_up )
568 p_context->skip_frame = p_sys->i_skip_frame;
570 else if( !b_drawpicture )
572 /* It creates broken picture
573 * FIXME either our parser or ffmpeg is broken */
575 if( p_sys->b_hurry_up )
576 p_context->skip_frame = __MAX( p_context->skip_frame,
582 * Do the actual decoding now */
584 /* Don't forget that libavcodec requires a little more bytes
585 * that the real frame size */
586 if( p_block && p_block->i_buffer > 0 )
588 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
590 p_block = block_Realloc( p_block, 0,
591 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
594 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
596 memset( p_block->p_buffer + p_block->i_buffer, 0,
597 FF_INPUT_BUFFER_PADDING_SIZE );
600 while( !p_block || p_block->i_buffer > 0 || p_sys->b_flush )
602 int i_used, b_gotpicture;
608 av_init_packet( &pkt );
611 pkt.data = p_block->p_buffer;
612 pkt.size = p_block->i_buffer;
613 pkt.pts = p_block->i_pts;
614 pkt.dts = p_block->i_dts;
618 /* Return delayed frames if codec has CODEC_CAP_DELAY */
623 if( !p_sys->palette_sent )
625 uint8_t *pal = av_packet_new_side_data(&pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
627 memcpy(pal, p_dec->fmt_in.video.p_palette->palette, AVPALETTE_SIZE);
628 p_sys->palette_sent = true;
632 /* Make sure we don't reuse the same timestamps twice */
636 p_block->i_dts = VLC_TS_INVALID;
639 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
640 &b_gotpicture, &pkt );
641 av_free_packet( &pkt );
646 p_sys->b_first_frame = true;
650 if( p_block->i_buffer <= 0 )
651 p_sys->b_flush = false;
656 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
658 block_Release( p_block );
661 else if( (unsigned)i_used > p_block->i_buffer ||
662 p_context->thread_count > 1 )
664 i_used = p_block->i_buffer;
668 p_block->i_buffer -= i_used;
669 p_block->p_buffer += i_used;
672 /* Nothing to display */
675 if( i_used == 0 ) break;
679 /* Sanity check (seems to be needed for some streams) */
680 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
682 p_sys->b_has_b_frames = true;
685 /* Compute the PTS */
687 p_sys->p_ff_pic->pkt_pts;
688 if (i_pts <= VLC_TS_INVALID)
689 i_pts = p_sys->p_ff_pic->pkt_dts;
691 if( i_pts <= VLC_TS_INVALID )
692 i_pts = p_sys->i_pts;
694 /* Interpolate the next PTS */
695 if( i_pts > VLC_TS_INVALID )
696 p_sys->i_pts = i_pts;
697 if( p_sys->i_pts > VLC_TS_INVALID )
699 /* interpolate the next PTS */
700 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
701 p_dec->fmt_in.video.i_frame_rate_base > 0 )
703 p_sys->i_pts += CLOCK_FREQ *
704 (2 + p_sys->p_ff_pic->repeat_pict) *
705 p_dec->fmt_in.video.i_frame_rate_base /
706 (2 * p_dec->fmt_in.video.i_frame_rate);
708 else if( p_context->time_base.den > 0 )
710 int i_tick = p_context->ticks_per_frame;
714 p_sys->i_pts += CLOCK_FREQ *
715 (2 + p_sys->p_ff_pic->repeat_pict) *
716 i_tick * p_context->time_base.num /
717 (2 * p_context->time_base.den);
721 /* Update frame late count (except when doing preroll) */
722 mtime_t i_display_date = 0;
723 if( !p_block || !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
724 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
726 if( i_display_date > 0 && i_display_date <= mdate() )
728 p_sys->i_late_frames++;
729 if( p_sys->i_late_frames == 1 )
730 p_sys->i_late_frames_start = mdate();
734 p_sys->i_late_frames = 0;
737 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
740 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
742 /* Get a new picture */
743 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
747 block_Release( p_block );
751 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
753 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
757 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
758 decoder_LinkPicture( p_dec, p_pic );
761 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
763 /* Fetch again the aspect ratio in case it changed */
764 p_dec->fmt_out.video.i_sar_num
765 = p_context->sample_aspect_ratio.num;
766 p_dec->fmt_out.video.i_sar_den
767 = p_context->sample_aspect_ratio.den;
769 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
771 p_dec->fmt_out.video.i_sar_num = 1;
772 p_dec->fmt_out.video.i_sar_den = 1;
776 /* Send decoded frame to vout */
777 if( i_pts > VLC_TS_INVALID)
781 if( p_sys->b_first_frame )
783 /* Hack to force display of still pictures */
784 p_sys->b_first_frame = false;
785 p_pic->b_force = true;
788 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
789 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
790 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
796 decoder_DeletePicture( p_dec, p_pic );
801 block_Release( p_block );
805 /*****************************************************************************
806 * EndVideo: decoder destruction
807 *****************************************************************************
808 * This function is called when the thread ends after a successful
810 *****************************************************************************/
811 void EndVideoDec( decoder_t *p_dec )
813 decoder_sys_t *p_sys = p_dec->p_sys;
817 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
818 if( p_sys->p_context->codec )
819 avcodec_flush_buffers( p_sys->p_context );
823 if( p_sys->p_ff_pic )
824 avcodec_free_frame( &p_sys->p_ff_pic );
827 vlc_va_Delete( p_sys->p_va );
829 vlc_sem_destroy( &p_sys->sem_mt );
832 /*****************************************************************************
833 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
834 *****************************************************************************/
835 static void ffmpeg_InitCodec( decoder_t *p_dec )
837 decoder_sys_t *p_sys = p_dec->p_sys;
838 int i_size = p_dec->fmt_in.i_extra;
840 if( !i_size ) return;
842 if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
846 p_sys->p_context->extradata_size = i_size + 12;
847 p = p_sys->p_context->extradata =
848 av_malloc( p_sys->p_context->extradata_size +
849 FF_INPUT_BUFFER_PADDING_SIZE );
853 memcpy( &p[0], "SVQ3", 4 );
854 memset( &p[4], 0, 8 );
855 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
857 /* Now remove all atoms before the SMI one */
858 if( p_sys->p_context->extradata_size > 0x5a &&
859 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
861 uint8_t *psz = &p[0x52];
863 while( psz < &p[p_sys->p_context->extradata_size - 8] )
865 int i_size = GetDWBE( psz );
868 /* FIXME handle 1 as long size */
871 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
873 memmove( &p[0x52], psz,
874 &p[p_sys->p_context->extradata_size] - psz );
884 p_sys->p_context->extradata_size = i_size;
885 p_sys->p_context->extradata =
886 av_malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
887 if( p_sys->p_context->extradata )
889 memcpy( p_sys->p_context->extradata,
890 p_dec->fmt_in.p_extra, i_size );
891 memset( p_sys->p_context->extradata + i_size,
892 0, FF_INPUT_BUFFER_PADDING_SIZE );
897 /*****************************************************************************
898 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
899 * picture_t structure (when not in direct rendering mode).
900 *****************************************************************************/
901 static void ffmpeg_CopyPicture( decoder_t *p_dec,
902 picture_t *p_pic, AVFrame *p_ff_pic )
904 decoder_sys_t *p_sys = p_dec->p_sys;
908 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic->opaque,
911 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
913 int i_plane, i_size, i_line;
914 uint8_t *p_dst, *p_src;
915 int i_src_stride, i_dst_stride;
917 if( p_sys->p_context->pix_fmt == PIX_FMT_PAL8 )
919 if( !p_pic->format.p_palette )
920 p_pic->format.p_palette = calloc( 1, sizeof(video_palette_t) );
922 if( p_pic->format.p_palette )
924 p_pic->format.p_palette->i_entries = AVPALETTE_COUNT;
925 memcpy( p_pic->format.p_palette->palette, p_ff_pic->data[1], AVPALETTE_SIZE );
929 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
931 p_src = p_ff_pic->data[i_plane];
932 p_dst = p_pic->p[i_plane].p_pixels;
933 i_src_stride = p_ff_pic->linesize[i_plane];
934 i_dst_stride = p_pic->p[i_plane].i_pitch;
936 i_size = __MIN( i_src_stride, i_dst_stride );
937 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
940 memcpy( p_dst, p_src, i_size );
941 p_src += i_src_stride;
942 p_dst += i_dst_stride;
948 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
949 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
950 p_sys->p_context->pix_fmt, name ? name : "unknown" );
955 #if LIBAVCODEC_VERSION_MAJOR >= 55
956 static int lavc_va_GetFrame(struct AVCodecContext *ctx, AVFrame *frame,
959 decoder_t *dec = ctx->opaque;
960 decoder_sys_t *sys = dec->p_sys;
961 vlc_va_t *va = sys->p_va;
963 if (vlc_va_Setup(va, &ctx->hwaccel_context, &dec->fmt_out.video.i_chroma,
964 ctx->coded_width, ctx->coded_height))
966 msg_Err(dec, "hardware acceleration setup failed");
969 if (vlc_va_Get(va, &frame->opaque, &frame->data[0]))
971 msg_Err(dec, "hardware acceleration picture allocation failed");
974 /* data[0] must be non-NULL for libavcodec internal checks.
975 * data[3] actually contains the format-specific surface handle. */
976 frame->data[3] = frame->data[0];
978 frame->buf[0] = av_buffer_create(frame->data[0], 0, va->release,
980 if (unlikely(frame->buf[0] == NULL))
982 vlc_va_Release(va, frame->opaque, frame->data[0]);
985 assert(frame->data[0] != NULL);
996 static void lavc_dr_ReleaseFrame(void *opaque, uint8_t *data)
998 lavc_pic_ref_t *ref = opaque;
1000 decoder_UnlinkPicture(ref->decoder, ref->picture);
1005 static picture_t *lavc_dr_GetFrame(struct AVCodecContext *ctx,
1006 AVFrame *frame, int flags)
1008 decoder_t *dec = (decoder_t *)ctx->opaque;
1009 decoder_sys_t *sys = dec->p_sys;
1011 if (GetVlcChroma(&dec->fmt_out.video, ctx->pix_fmt) != VLC_SUCCESS)
1013 dec->fmt_out.i_codec = dec->fmt_out.video.i_chroma;
1014 if (ctx->pix_fmt == PIX_FMT_PAL8)
1017 int width = frame->width;
1018 int height = frame->height;
1019 int aligns[AV_NUM_DATA_POINTERS];
1021 avcodec_align_dimensions2(ctx, &width, &height, aligns);
1023 picture_t *pic = ffmpeg_NewPictBuf(dec, ctx);
1027 /* Check that the picture is suitable for libavcodec */
1028 if (pic->p[0].i_pitch < width * pic->p[0].i_pixel_pitch)
1030 if (sys->i_direct_rendering_used != 0)
1031 msg_Dbg(dec, "plane 0: pitch too small (%d/%d*%d)",
1032 pic->p[0].i_pitch, width, pic->p[0].i_pixel_pitch);
1036 if (pic->p[0].i_lines < height)
1038 if (sys->i_direct_rendering_used != 0)
1039 msg_Dbg(dec, "plane 0: lines too few (%d/%d)",
1040 pic->p[0].i_lines, height);
1044 for (int i = 0; i < pic->i_planes; i++)
1046 if (pic->p[i].i_pitch % aligns[i])
1048 if (sys->i_direct_rendering_used != 0)
1049 msg_Dbg(dec, "plane %d: pitch not aligned (%d%%%d)",
1050 i, pic->p[i].i_pitch, aligns[i]);
1053 if (((uintptr_t)pic->p[i].p_pixels) % aligns[i])
1055 if (sys->i_direct_rendering_used != 0)
1056 msg_Warn(dec, "plane %d not aligned", i);
1061 /* Allocate buffer references */
1062 for (int i = 0; i < pic->i_planes; i++)
1064 lavc_pic_ref_t *ref = malloc(sizeof (*ref));
1069 decoder_LinkPicture(dec, pic);
1071 uint8_t *data = pic->p[i].p_pixels;
1072 int size = pic->p[i].i_pitch * pic->p[i].i_lines;
1074 frame->buf[i] = av_buffer_create(data, size, lavc_dr_ReleaseFrame,
1076 if (unlikely(frame->buf[i] == NULL))
1078 lavc_dr_ReleaseFrame(ref, data);
1082 decoder_UnlinkPicture(dec, pic);
1086 for (unsigned i = 0; frame->buf[i] != NULL; i++)
1087 av_buffer_unref(&frame->buf[i]);
1089 decoder_DeletePicture(dec, pic);
1094 * Callback used by libavcodec to get a frame buffer.
1096 * It is used for direct rendering as well as to get the right PTS for each
1097 * decoded picture (even in indirect rendering mode).
1099 static int lavc_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags)
1101 decoder_t *dec = ctx->opaque;
1102 decoder_sys_t *sys = dec->p_sys;
1105 for (unsigned i = 0; i < AV_NUM_DATA_POINTERS; i++)
1107 frame->data[i] = NULL;
1108 frame->linesize[i] = 0;
1109 frame->buf[i] = NULL;
1112 if (sys->p_va != NULL)
1113 return lavc_va_GetFrame(ctx, frame, flags);
1115 frame->opaque = NULL;
1116 if (!sys->b_direct_rendering)
1117 return avcodec_default_get_buffer2(ctx, frame, flags);
1119 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1120 * so we need to check for direct rendering again. */
1122 pic = lavc_dr_GetFrame(ctx, frame, flags);
1125 if (sys->i_direct_rendering_used != 0)
1127 msg_Warn(dec, "disabling direct rendering");
1128 sys->i_direct_rendering_used = 0;
1131 return avcodec_default_get_buffer2(ctx, frame, flags);
1134 if (sys->i_direct_rendering_used != 1)
1136 msg_Dbg(dec, "enabling direct rendering");
1137 sys->i_direct_rendering_used = 1;
1141 frame->opaque = pic;
1142 static_assert(PICTURE_PLANE_MAX <= AV_NUM_DATA_POINTERS, "Oops!");
1143 for (unsigned i = 0; i < PICTURE_PLANE_MAX; i++)
1145 frame->data[i] = pic->p[i].p_pixels;
1146 frame->linesize[i] = pic->p[i].i_pitch;
1151 static int ffmpeg_va_GetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1153 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1154 decoder_sys_t *p_sys = p_dec->p_sys;
1155 vlc_va_t *p_va = p_sys->p_va;
1157 /* hwaccel_context is not present in old ffmpeg version */
1158 if( vlc_va_Setup( p_va,
1159 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
1160 p_context->coded_width, p_context->coded_height ) )
1162 msg_Err( p_dec, "vlc_va_Setup failed" );
1166 if( vlc_va_Get( p_va, &p_ff_pic->opaque, &p_ff_pic->data[0] ) )
1168 msg_Err( p_dec, "vlc_va_Get failed" );
1172 p_ff_pic->data[3] = p_ff_pic->data[0];
1173 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1177 static picture_t *ffmpeg_dr_GetFrameBuf(struct AVCodecContext *p_context)
1179 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1180 decoder_sys_t *p_sys = p_dec->p_sys;
1182 int i_width = p_context->width;
1183 int i_height = p_context->height;
1184 avcodec_align_dimensions( p_context, &i_width, &i_height );
1186 picture_t *p_pic = NULL;
1187 if (GetVlcChroma(&p_dec->fmt_out.video, p_context->pix_fmt) != VLC_SUCCESS)
1190 if (p_context->pix_fmt == PIX_FMT_PAL8)
1193 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1195 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1199 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1200 p_pic->p[0].i_lines < i_height )
1203 for( int i = 0; i < p_pic->i_planes; i++ )
1206 switch( p_sys->i_codec_id )
1208 case AV_CODEC_ID_SVQ1:
1209 case AV_CODEC_ID_VP5:
1210 case AV_CODEC_ID_VP6:
1211 case AV_CODEC_ID_VP6F:
1212 case AV_CODEC_ID_VP6A:
1216 i_align = i == 0 ? 16 : 8;
1219 if( p_pic->p[i].i_pitch % i_align )
1221 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1225 if( p_context->pix_fmt == PIX_FMT_YUV422P )
1227 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1228 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1236 decoder_DeletePicture( p_dec, p_pic );
1241 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
1244 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1245 decoder_sys_t *p_sys = p_dec->p_sys;
1248 p_ff_pic->opaque = NULL;
1249 #if ! LIBAVCODEC_VERSION_CHECK(54, 34, 0, 79, 101)
1250 p_ff_pic->pkt_pts = p_context->pkt ? p_context->pkt->pts : AV_NOPTS_VALUE;
1254 return ffmpeg_va_GetFrameBuf(p_context, p_ff_pic);
1256 if( !p_sys->b_direct_rendering )
1257 return avcodec_default_get_buffer( p_context, p_ff_pic );
1260 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1261 * so we need to check for direct rendering again. */
1263 picture_t *p_pic = ffmpeg_dr_GetFrameBuf(p_context);
1265 if( p_sys->i_direct_rendering_used != 0 )
1267 msg_Warn( p_dec, "disabling direct rendering" );
1268 p_sys->i_direct_rendering_used = 0;
1272 return avcodec_default_get_buffer( p_context, p_ff_pic );
1275 if( p_sys->i_direct_rendering_used != 1 ) {
1276 msg_Dbg( p_dec, "using direct rendering" );
1277 p_sys->i_direct_rendering_used = 1;
1280 p_context->draw_horiz_band = NULL;
1283 p_ff_pic->opaque = (void*)p_pic;
1284 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1285 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1286 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1287 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1288 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1290 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1291 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1292 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1293 p_ff_pic->linesize[3] = 0;
1298 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1301 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1302 decoder_sys_t *p_sys = p_dec->p_sys;
1305 vlc_va_Release( p_sys->p_va, p_ff_pic->opaque, p_ff_pic->data[0] );
1306 else if( p_ff_pic->opaque )
1307 decoder_UnlinkPicture( p_dec, (picture_t*)p_ff_pic->opaque);
1308 else if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1309 /* We can end up here without the AVFrame being allocated by
1310 * avcodec_default_get_buffer() if VA is used and the frame is
1311 * released when the decoder is closed
1313 avcodec_default_release_buffer( p_context, p_ff_pic );
1315 for( int i = 0; i < 4; i++ )
1316 p_ff_pic->data[i] = NULL;
1320 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1321 const enum PixelFormat *pi_fmt )
1323 decoder_t *p_dec = p_context->opaque;
1324 decoder_sys_t *p_sys = p_dec->p_sys;
1325 vlc_va_t *p_va = p_sys->p_va;
1328 vlc_va_Delete( p_va );
1330 /* Enumerate available formats */
1331 bool can_hwaccel = false;
1332 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1334 const AVPixFmtDescriptor *dsc = av_pix_fmt_desc_get(pi_fmt[i]);
1337 bool hwaccel = (dsc->flags & AV_PIX_FMT_FLAG_HWACCEL) != 0;
1339 msg_Dbg( p_dec, "available %sware decoder output format %d (%s)",
1340 hwaccel ? "hard" : "soft", pi_fmt[i], dsc->name );
1348 /* Profile and level information is needed now.
1349 * TODO: avoid code duplication with avcodec.c */
1350 if( p_context->profile != FF_PROFILE_UNKNOWN)
1351 p_dec->fmt_in.i_profile = p_context->profile;
1352 if( p_context->level != FF_LEVEL_UNKNOWN)
1353 p_dec->fmt_in.i_level = p_context->level;
1355 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_context, &p_dec->fmt_in );
1359 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1361 if( p_va->pix_fmt != pi_fmt[i] )
1364 /* We try to call vlc_va_Setup when possible to detect errors when
1365 * possible (later is too late) */
1366 if( p_context->width > 0 && p_context->height > 0
1367 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1368 &p_dec->fmt_out.video.i_chroma,
1369 p_context->width, p_context->height ) )
1371 msg_Err( p_dec, "acceleration setup failure" );
1375 if( p_va->description )
1376 msg_Info( p_dec, "Using %s for hardware decoding.",
1377 p_va->description );
1379 /* FIXME this will disable direct rendering
1380 * even if a new pixel format is renegotiated
1382 p_sys->b_direct_rendering = false;
1384 p_context->draw_horiz_band = NULL;
1388 vlc_va_Delete( p_va );
1391 /* Fallback to default behaviour */
1393 return avcodec_default_get_format( p_context, pi_fmt );