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>
36 #include <vlc_modules.h>
39 #include <libavcodec/avcodec.h>
40 #include <libavutil/mem.h>
41 #include <libavutil/pixdesc.h>
46 /*****************************************************************************
47 * decoder_sys_t : decoder descriptor
48 *****************************************************************************/
51 AVCODEC_COMMON_MEMBERS
53 /* Video decoder specific part */
58 /* for frame skipping algo */
60 enum AVDiscard i_skip_frame;
61 enum AVDiscard i_skip_idct;
63 /* how many decoded frames are late */
65 mtime_t i_late_frames_start;
67 /* for direct rendering */
68 bool b_direct_rendering;
69 int i_direct_rendering_used;
73 /* Hack to force display of still pictures */
78 #if LIBAVCODEC_VERSION_MAJOR < 54
79 AVPaletteControl palette;
93 #ifdef HAVE_AVCODEC_MT
94 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
95 # define post_mt(s) vlc_sem_post( &s->sem_mt )
101 /*****************************************************************************
103 *****************************************************************************/
104 static void ffmpeg_InitCodec ( decoder_t * );
105 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
106 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
107 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
108 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
109 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
110 const enum PixelFormat * );
111 static void vlc_va_Delete( vlc_va_t * );
113 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
115 uint8_t *p = (uint8_t*)&fcc;
116 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
119 /*****************************************************************************
121 *****************************************************************************/
123 /* Returns a new picture buffer */
124 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
125 AVCodecContext *p_context )
127 decoder_sys_t *p_sys = p_dec->p_sys;
129 p_dec->fmt_out.video.i_width = p_context->width;
130 p_dec->fmt_out.video.i_height = p_context->height;
132 if( !p_context->width || !p_context->height )
134 return NULL; /* invalid display size */
137 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
139 /* we are doomed, but not really, because most codecs set their pix_fmt
141 * FIXME does it make sense here ? */
142 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
144 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
146 /* If an aspect-ratio was specified in the input format then force it */
147 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
149 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
150 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
154 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
155 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
157 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
159 p_dec->fmt_out.video.i_sar_num = 1;
160 p_dec->fmt_out.video.i_sar_den = 1;
164 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
165 p_dec->fmt_in.video.i_frame_rate_base > 0 )
167 p_dec->fmt_out.video.i_frame_rate =
168 p_dec->fmt_in.video.i_frame_rate;
169 p_dec->fmt_out.video.i_frame_rate_base =
170 p_dec->fmt_in.video.i_frame_rate_base;
172 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
174 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
175 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
178 return decoder_NewPicture( p_dec );
181 /*****************************************************************************
182 * InitVideo: initialize the video decoder
183 *****************************************************************************
184 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
185 * opened (done after the first decoded frame).
186 *****************************************************************************/
187 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
188 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
190 decoder_sys_t *p_sys;
193 /* Allocate the memory needed to store the decoder's structure */
194 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
197 p_codec->type = AVMEDIA_TYPE_VIDEO;
198 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
199 p_context->codec_id = i_codec_id;
200 p_sys->p_context = p_context;
201 p_sys->p_codec = p_codec;
202 p_sys->i_codec_id = i_codec_id;
203 p_sys->psz_namecodec = psz_namecodec;
204 p_sys->p_ff_pic = avcodec_alloc_frame();
205 p_sys->b_delayed_open = true;
207 vlc_sem_init( &p_sys->sem_mt, 0 );
209 /* ***** Fill p_context with init values ***** */
210 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
212 /* ***** Get configuration of ffmpeg plugin ***** */
213 p_sys->p_context->workaround_bugs =
214 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
215 #if LIBAVCODEC_VERSION_MAJOR < 54
216 p_sys->p_context->error_recognition =
218 p_sys->p_context->err_recognition =
220 var_InheritInteger( p_dec, "avcodec-error-resilience" );
222 if( var_CreateGetBool( p_dec, "grayscale" ) )
223 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
225 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
226 if( i_val ) p_sys->p_context->debug_mv = i_val;
228 i_val = var_CreateGetInteger( p_dec, "avcodec-lowres" );
229 if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
231 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
232 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
233 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
234 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
235 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
237 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
238 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
240 /* ***** libavcodec frame skipping ***** */
241 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
243 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
246 p_sys->p_context->skip_frame = AVDISCARD_NONE;
249 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
252 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
255 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
258 p_sys->p_context->skip_frame = AVDISCARD_ALL;
261 p_sys->p_context->skip_frame = AVDISCARD_NONE;
264 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
266 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
269 p_sys->p_context->skip_idct = AVDISCARD_NONE;
272 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
275 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
278 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
281 p_sys->p_context->skip_idct = AVDISCARD_ALL;
284 p_sys->p_context->skip_idct = AVDISCARD_NONE;
287 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
289 /* ***** libavcodec direct rendering ***** */
290 p_sys->b_direct_rendering = false;
291 p_sys->i_direct_rendering_used = -1;
292 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
293 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
294 /* No idea why ... but this fixes flickering on some TSCC streams */
295 p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD &&
296 p_sys->i_codec_id != CODEC_ID_CINEPAK &&
297 !p_sys->p_context->debug_mv )
299 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
300 * so we need to do another check in ffmpeg_GetFrameBuf() */
301 p_sys->b_direct_rendering = true;
304 /* libavcodec doesn't properly release old pictures when frames are skipped */
305 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
306 if( p_sys->b_direct_rendering )
308 msg_Dbg( p_dec, "trying to use direct rendering" );
309 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
313 msg_Dbg( p_dec, "direct rendering is disabled" );
316 /* Always use our get_buffer wrapper so we can calculate the
318 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
319 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
320 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
321 p_sys->p_context->opaque = p_dec;
323 #ifdef HAVE_AVCODEC_MT
324 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
325 if( i_thread_count <= 0 )
327 i_thread_count = vlc_GetCPUCount();
328 if( i_thread_count > 1 )
331 //FIXME: take in count the decoding time
332 i_thread_count = __MIN( i_thread_count, 4 );
334 i_thread_count = __MIN( i_thread_count, 16 );
335 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
336 p_sys->p_context->thread_count = i_thread_count;
339 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
340 if( (hw == NULL || strcasecmp( hw, "none" )) &&
341 (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
342 i_codec_id == CODEC_ID_MPEG4 ||
343 i_codec_id == CODEC_ID_H264 ||
344 i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
346 #ifdef HAVE_AVCODEC_MT
347 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
349 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
350 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
352 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
353 ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) )
355 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
356 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
359 p_sys->p_context->get_format = ffmpeg_GetFormat;
362 #ifdef HAVE_AVCODEC_MT
363 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
364 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
368 /* ***** misc init ***** */
369 p_sys->i_pts = VLC_TS_INVALID;
370 p_sys->b_has_b_frames = false;
371 p_sys->b_first_frame = true;
372 p_sys->b_flush = false;
373 p_sys->i_late_frames = 0;
375 /* Set output properties */
376 p_dec->fmt_out.i_cat = VIDEO_ES;
377 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
379 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
380 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
382 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
384 #if LIBAVCODEC_VERSION_MAJOR < 54
386 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
387 if( p_dec->fmt_in.video.p_palette )
389 p_sys->palette.palette_changed = 1;
391 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
397 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
398 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
399 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
400 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
402 p_sys->palette.palette[i] = c.u;
404 p_sys->p_context->palctrl = &p_sys->palette;
406 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
407 if( p_dec->fmt_out.video.p_palette )
408 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
410 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
412 p_sys->p_context->palctrl = &p_sys->palette;
418 /* ***** init this codec with special data ***** */
419 ffmpeg_InitCodec( p_dec );
421 /* ***** Open the codec ***** */
422 if( ffmpeg_OpenCodec( p_dec ) < 0 )
424 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
425 av_free( p_sys->p_ff_pic );
426 vlc_sem_destroy( &p_sys->sem_mt );
434 /*****************************************************************************
435 * DecodeVideo: Called to decode one or more frames
436 *****************************************************************************/
437 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
439 decoder_sys_t *p_sys = p_dec->p_sys;
440 AVCodecContext *p_context = p_sys->p_context;
442 int b_null_size = false;
445 if( !pp_block || !*pp_block )
448 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
450 ffmpeg_InitCodec( p_dec );
451 if( p_sys->b_delayed_open )
453 if( ffmpeg_OpenCodec( p_dec ) )
454 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
459 if( p_sys->b_delayed_open )
461 block_Release( p_block );
465 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
467 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
469 p_sys->i_late_frames = 0;
471 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
472 avcodec_flush_buffers( p_context );
474 block_Release( p_block );
478 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
480 /* Do not care about late frames when prerolling
481 * TODO avoid decoding of non reference frame
482 * (ie all B except for H264 where it depends only on nal_ref_idc) */
483 p_sys->i_late_frames = 0;
486 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
487 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
489 if( p_sys->i_pts > VLC_TS_INVALID )
491 msg_Err( p_dec, "more than 5 seconds of late video -> "
492 "dropping frame (computer too slow ?)" );
493 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
495 block_Release( p_block );
496 p_sys->i_late_frames--;
500 /* A good idea could be to decode all I pictures and see for the other */
501 if( !p_dec->b_pace_control &&
503 (p_sys->i_late_frames > 4) )
506 if( p_sys->i_late_frames < 12 )
508 p_context->skip_frame =
509 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
510 AVDISCARD_NONREF : p_sys->i_skip_frame;
514 /* picture too late, won't decode
515 * but break picture until a new I, and for mpeg4 ...*/
516 p_sys->i_late_frames--; /* needed else it will never be decrease */
517 block_Release( p_block );
523 if( p_sys->b_hurry_up )
524 p_context->skip_frame = p_sys->i_skip_frame;
525 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
531 if( p_context->width <= 0 || p_context->height <= 0 )
533 if( p_sys->b_hurry_up )
534 p_context->skip_frame = p_sys->i_skip_frame;
537 else if( !b_drawpicture )
539 /* It creates broken picture
540 * FIXME either our parser or ffmpeg is broken */
542 if( p_sys->b_hurry_up )
543 p_context->skip_frame = __MAX( p_context->skip_frame,
549 * Do the actual decoding now */
551 /* Don't forget that libavcodec requires a little more bytes
552 * that the real frame size */
553 if( p_block->i_buffer > 0 )
555 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
557 p_block = block_Realloc( p_block, 0,
558 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
561 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
563 memset( p_block->p_buffer + p_block->i_buffer, 0,
564 FF_INPUT_BUFFER_PADDING_SIZE );
567 while( p_block->i_buffer > 0 || p_sys->b_flush )
569 int i_used, b_gotpicture;
573 /* Set the PTS/DTS in the context reordered_opaque field */
574 if( p_block->i_pts > VLC_TS_INVALID )
575 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
576 else if( p_block->i_dts > VLC_TS_INVALID )
577 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
579 p_context->reordered_opaque = INT64_MIN;
580 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
582 /* Make sure we don't reuse the same timestamps twice */
584 p_block->i_dts = VLC_TS_INVALID;
588 av_init_packet( &pkt );
589 pkt.data = p_block->p_buffer;
590 pkt.size = p_block->i_buffer;
591 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
592 &b_gotpicture, &pkt );
594 if( b_null_size && !p_sys->b_flush &&
595 p_context->width > 0 && p_context->height > 0 )
597 /* Reparse it to not drop the I frame */
599 if( p_sys->b_hurry_up )
600 p_context->skip_frame = p_sys->i_skip_frame;
601 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
602 &b_gotpicture, &pkt );
607 p_sys->b_first_frame = true;
609 if( p_block->i_buffer <= 0 )
610 p_sys->b_flush = false;
615 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
617 block_Release( p_block );
620 else if( i_used > p_block->i_buffer ||
621 p_context->thread_count > 1 )
623 i_used = p_block->i_buffer;
627 p_block->i_buffer -= i_used;
628 p_block->p_buffer += i_used;
630 /* Nothing to display */
633 if( i_used == 0 ) break;
637 /* Sanity check (seems to be needed for some streams) */
638 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
640 p_sys->b_has_b_frames = true;
643 /* Compute the PTS */
644 mtime_t i_pts = VLC_TS_INVALID;
645 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
647 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
648 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
651 if( !p_context->has_b_frames ||
652 !p_sys->b_has_b_frames ||
653 !p_sys->p_ff_pic->reference ||
654 p_sys->i_pts <= VLC_TS_INVALID )
657 /* Guess what ? The rules are different for Real Video :( */
658 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
659 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
660 p_sys->b_has_b_frames )
662 i_pts = VLC_TS_INVALID;
663 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
671 if( i_pts <= VLC_TS_INVALID )
672 i_pts = p_sys->i_pts;
674 /* Interpolate the next PTS */
675 if( i_pts > VLC_TS_INVALID )
676 p_sys->i_pts = i_pts;
677 if( p_sys->i_pts > VLC_TS_INVALID )
679 /* interpolate the next PTS */
680 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
681 p_dec->fmt_in.video.i_frame_rate_base > 0 )
683 p_sys->i_pts += INT64_C(1000000) *
684 (2 + p_sys->p_ff_pic->repeat_pict) *
685 p_dec->fmt_in.video.i_frame_rate_base /
686 (2 * p_dec->fmt_in.video.i_frame_rate);
688 else if( p_context->time_base.den > 0 )
690 int i_tick = p_context->ticks_per_frame;
694 p_sys->i_pts += INT64_C(1000000) *
695 (2 + p_sys->p_ff_pic->repeat_pict) *
696 i_tick * p_context->time_base.num /
697 (2 * p_context->time_base.den);
701 /* Update frame late count (except when doing preroll) */
702 mtime_t i_display_date = 0;
703 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
704 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
706 if( i_display_date > 0 && i_display_date <= mdate() )
708 p_sys->i_late_frames++;
709 if( p_sys->i_late_frames == 1 )
710 p_sys->i_late_frames_start = mdate();
714 p_sys->i_late_frames = 0;
717 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
720 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
722 /* Get a new picture */
723 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
726 block_Release( p_block );
730 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
732 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
736 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
737 decoder_LinkPicture( p_dec, p_pic );
740 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
742 /* Fetch again the aspect ratio in case it changed */
743 p_dec->fmt_out.video.i_sar_num
744 = p_context->sample_aspect_ratio.num;
745 p_dec->fmt_out.video.i_sar_den
746 = p_context->sample_aspect_ratio.den;
748 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
750 p_dec->fmt_out.video.i_sar_num = 1;
751 p_dec->fmt_out.video.i_sar_den = 1;
755 /* Send decoded frame to vout */
756 if( i_pts > VLC_TS_INVALID)
760 if( p_sys->b_first_frame )
762 /* Hack to force display of still pictures */
763 p_sys->b_first_frame = false;
764 p_pic->b_force = true;
767 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
768 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
769 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
771 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
772 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
773 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
774 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
775 p_pic->i_qstride * i_mb_h );
776 switch( p_sys->p_ff_pic->qscale_type )
778 case FF_QSCALE_TYPE_MPEG1:
779 p_pic->i_qtype = QTYPE_MPEG1;
781 case FF_QSCALE_TYPE_MPEG2:
782 p_pic->i_qtype = QTYPE_MPEG2;
784 case FF_QSCALE_TYPE_H264:
785 p_pic->i_qtype = QTYPE_H264;
793 decoder_DeletePicture( p_dec, p_pic );
797 block_Release( p_block );
801 /*****************************************************************************
802 * EndVideo: decoder destruction
803 *****************************************************************************
804 * This function is called when the thread ends after a successful
806 *****************************************************************************/
807 void EndVideoDec( decoder_t *p_dec )
809 decoder_sys_t *p_sys = p_dec->p_sys;
813 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
814 if( p_sys->p_context->codec )
815 avcodec_flush_buffers( p_sys->p_context );
819 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
823 vlc_va_Delete( p_sys->p_va );
826 vlc_sem_destroy( &p_sys->sem_mt );
829 /*****************************************************************************
830 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
831 *****************************************************************************/
832 static void ffmpeg_InitCodec( decoder_t *p_dec )
834 decoder_sys_t *p_sys = p_dec->p_sys;
835 int i_size = p_dec->fmt_in.i_extra;
837 if( !i_size ) return;
839 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
843 p_sys->p_context->extradata_size = i_size + 12;
844 p = p_sys->p_context->extradata =
845 malloc( p_sys->p_context->extradata_size );
849 memcpy( &p[0], "SVQ3", 4 );
850 memset( &p[4], 0, 8 );
851 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
853 /* Now remove all atoms before the SMI one */
854 if( p_sys->p_context->extradata_size > 0x5a &&
855 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
857 uint8_t *psz = &p[0x52];
859 while( psz < &p[p_sys->p_context->extradata_size - 8] )
861 int i_size = GetDWBE( psz );
864 /* FIXME handle 1 as long size */
867 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
869 memmove( &p[0x52], psz,
870 &p[p_sys->p_context->extradata_size] - psz );
880 p_sys->p_context->extradata_size = i_size;
881 p_sys->p_context->extradata =
882 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
883 if( p_sys->p_context->extradata )
885 memcpy( p_sys->p_context->extradata,
886 p_dec->fmt_in.p_extra, i_size );
887 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
888 0, FF_INPUT_BUFFER_PADDING_SIZE );
893 /*****************************************************************************
894 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
895 * picture_t structure (when not in direct rendering mode).
896 *****************************************************************************/
897 static void ffmpeg_CopyPicture( decoder_t *p_dec,
898 picture_t *p_pic, AVFrame *p_ff_pic )
900 decoder_sys_t *p_sys = p_dec->p_sys;
904 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
906 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
908 int i_plane, i_size, i_line;
909 uint8_t *p_dst, *p_src;
910 int i_src_stride, i_dst_stride;
912 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
914 p_src = p_ff_pic->data[i_plane];
915 p_dst = p_pic->p[i_plane].p_pixels;
916 i_src_stride = p_ff_pic->linesize[i_plane];
917 i_dst_stride = p_pic->p[i_plane].i_pitch;
919 i_size = __MIN( i_src_stride, i_dst_stride );
920 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
923 memcpy( p_dst, p_src, i_size );
924 p_src += i_src_stride;
925 p_dst += i_dst_stride;
931 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
932 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
933 p_sys->p_context->pix_fmt, name ? name : "unknown" );
938 /*****************************************************************************
939 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
940 *****************************************************************************
941 * It is used for direct rendering as well as to get the right PTS for each
942 * decoded picture (even in indirect rendering mode).
943 *****************************************************************************/
944 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
947 decoder_t *p_dec = (decoder_t *)p_context->opaque;
948 decoder_sys_t *p_sys = p_dec->p_sys;
952 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
953 p_ff_pic->opaque = NULL;
957 /* hwaccel_context is not present in old ffmpeg version */
958 if( vlc_va_Setup( p_sys->p_va,
959 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
960 p_context->width, p_context->height ) )
962 msg_Err( p_dec, "vlc_va_Setup failed" );
967 p_ff_pic->type = FF_BUFFER_TYPE_USER;
969 #if LIBAVCODEC_VERSION_MAJOR < 54
970 p_ff_pic->age = 256*256*256*64;
973 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
975 msg_Err( p_dec, "VaGrabSurface failed" );
980 else if( !p_sys->b_direct_rendering )
982 /* Not much to do in indirect rendering mode. */
983 return avcodec_default_get_buffer( p_context, p_ff_pic );
987 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
988 * so we need to check for direct rendering again. */
990 int i_width = p_context->width;
991 int i_height = p_context->height;
992 avcodec_align_dimensions( p_context, &i_width, &i_height );
994 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
995 p_context->pix_fmt == PIX_FMT_PAL8 )
998 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1000 /* Get a new picture */
1001 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1004 bool b_compatible = true;
1005 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1006 p_pic->p[0].i_lines < i_height )
1007 b_compatible = false;
1008 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
1011 switch( p_sys->i_codec_id )
1021 i_align = i == 0 ? 16 : 8;
1024 if( p_pic->p[i].i_pitch % i_align )
1025 b_compatible = false;
1026 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1027 b_compatible = false;
1029 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
1031 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1032 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1033 b_compatible = false;
1037 decoder_DeletePicture( p_dec, p_pic );
1041 if( p_sys->i_direct_rendering_used != 1 )
1043 msg_Dbg( p_dec, "using direct rendering" );
1044 p_sys->i_direct_rendering_used = 1;
1047 p_context->draw_horiz_band = NULL;
1049 p_ff_pic->opaque = (void*)p_pic;
1050 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1051 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1052 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1053 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1054 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1056 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1057 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1058 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1059 p_ff_pic->linesize[3] = 0;
1061 #if LIBAVCODEC_VERSION_MAJOR < 54
1062 p_ff_pic->age = 256*256*256*64;
1069 if( p_sys->i_direct_rendering_used != 0 )
1071 msg_Warn( p_dec, "disabling direct rendering" );
1072 p_sys->i_direct_rendering_used = 0;
1075 return avcodec_default_get_buffer( p_context, p_ff_pic );
1077 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1079 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1081 /* We always use default reget function, it works perfectly fine */
1082 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1085 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1088 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1089 decoder_sys_t *p_sys = p_dec->p_sys;
1093 vlc_va_Release( p_sys->p_va, p_ff_pic );
1095 else if( !p_ff_pic->opaque )
1097 /* We can end up here without the AVFrame being allocated by
1098 * avcodec_default_get_buffer() if VA is used and the frame is
1099 * released when the decoder is closed
1101 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1102 avcodec_default_release_buffer( p_context, p_ff_pic );
1106 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1108 decoder_UnlinkPicture( p_dec, p_pic );
1110 for( int i = 0; i < 4; i++ )
1111 p_ff_pic->data[i] = NULL;
1114 static int ffmpeg_va_Start( void *func, va_list ap )
1116 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1117 int codec = va_arg( ap, int );
1118 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1119 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1121 return open( va, codec, fmt );
1124 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1125 const es_format_t *fmt )
1127 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1128 if( unlikely(p_va == NULL) )
1131 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1132 true, ffmpeg_va_Start, p_va,
1134 if( p_va->module == NULL )
1136 vlc_object_release( p_va );
1142 static void ffmpeg_va_Stop( void *func, va_list ap )
1144 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1145 void (*close)( vlc_va_t * ) = func;
1150 static void vlc_va_Delete( vlc_va_t *va )
1152 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1153 vlc_object_release( va );
1156 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1157 const enum PixelFormat *pi_fmt )
1159 decoder_t *p_dec = p_context->opaque;
1160 decoder_sys_t *p_sys = p_dec->p_sys;
1161 vlc_va_t *p_va = p_sys->p_va;
1164 vlc_va_Delete( p_va );
1166 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1169 /* Try too look for a supported hw acceleration */
1170 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1172 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1173 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1174 pi_fmt[i], name ? name : "unknown" );
1175 if( p_va->pix_fmt != pi_fmt[i] )
1178 /* We try to call vlc_va_Setup when possible to detect errors when
1179 * possible (later is too late) */
1180 if( p_context->width > 0 && p_context->height > 0
1181 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1182 &p_dec->fmt_out.video.i_chroma,
1183 p_context->width, p_context->height ) )
1185 msg_Err( p_dec, "acceleration setup failure" );
1189 if( p_va->description )
1190 msg_Info( p_dec, "Using %s for hardware decoding.",
1191 p_va->description );
1193 /* FIXME this will disable direct rendering
1194 * even if a new pixel format is renegotiated
1196 p_sys->b_direct_rendering = false;
1198 p_context->draw_horiz_band = NULL;
1202 msg_Err( p_dec, "acceleration not available" );
1203 vlc_va_Delete( p_va );
1207 /* Fallback to default behaviour */
1208 return avcodec_default_get_format( p_context, pi_fmt );