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;
60 enum AVDiscard i_skip_idct;
62 /* how many decoded frames are late */
64 mtime_t i_late_frames_start;
66 /* for direct rendering */
67 bool b_direct_rendering;
68 int i_direct_rendering_used;
72 /* Hack to force display of still pictures */
77 #if LIBAVCODEC_VERSION_MAJOR < 54
78 AVPaletteControl palette;
92 #ifdef HAVE_AVCODEC_MT
93 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
94 # define post_mt(s) vlc_sem_post( &s->sem_mt )
100 /*****************************************************************************
102 *****************************************************************************/
103 static void ffmpeg_InitCodec ( decoder_t * );
104 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
105 #if LIBAVCODEC_VERSION_MAJOR >= 55
106 static int lavc_GetFrame(struct AVCodecContext *, AVFrame *, int);
108 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
109 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
111 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
112 const enum PixelFormat * );
114 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
116 uint8_t *p = (uint8_t*)&fcc;
117 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
120 /*****************************************************************************
122 *****************************************************************************/
124 /* Returns a new picture buffer */
125 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
126 AVCodecContext *p_context )
128 decoder_sys_t *p_sys = p_dec->p_sys;
130 if( p_context->coded_width != p_context->width ||
131 p_context->coded_height != p_context->height )
133 p_dec->fmt_out.video.i_visible_width = p_context->width;
134 p_dec->fmt_out.video.i_visible_height = p_context->height;
136 p_dec->fmt_out.video.i_width = p_context->coded_width;
137 p_dec->fmt_out.video.i_height = p_context->coded_height;
139 if( !p_context->width || !p_context->height )
141 return NULL; /* invalid display size */
144 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
146 /* we are doomed, but not really, because most codecs set their pix_fmt
148 * FIXME does it make sense here ? */
149 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
151 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
153 /* If an aspect-ratio was specified in the input format then force it */
154 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
156 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
157 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
161 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
162 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
164 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
166 p_dec->fmt_out.video.i_sar_num = 1;
167 p_dec->fmt_out.video.i_sar_den = 1;
171 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
172 p_dec->fmt_in.video.i_frame_rate_base > 0 )
174 p_dec->fmt_out.video.i_frame_rate =
175 p_dec->fmt_in.video.i_frame_rate;
176 p_dec->fmt_out.video.i_frame_rate_base =
177 p_dec->fmt_in.video.i_frame_rate_base;
179 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
181 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
182 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num * __MAX( p_context->ticks_per_frame, 1 );
185 return decoder_NewPicture( p_dec );
188 /*****************************************************************************
189 * InitVideo: initialize the video decoder
190 *****************************************************************************
191 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
192 * opened (done after the first decoded frame).
193 *****************************************************************************/
194 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
195 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
197 decoder_sys_t *p_sys;
200 /* Allocate the memory needed to store the decoder's structure */
201 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
204 p_codec->type = AVMEDIA_TYPE_VIDEO;
205 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
206 p_context->codec_id = i_codec_id;
207 p_sys->p_context = p_context;
208 p_sys->p_codec = p_codec;
209 p_sys->i_codec_id = i_codec_id;
210 p_sys->psz_namecodec = psz_namecodec;
211 p_sys->p_ff_pic = avcodec_alloc_frame();
212 p_sys->b_delayed_open = true;
214 vlc_sem_init( &p_sys->sem_mt, 0 );
216 /* ***** Fill p_context with init values ***** */
217 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
219 /* ***** Get configuration of ffmpeg plugin ***** */
220 p_sys->p_context->workaround_bugs =
221 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
222 p_sys->p_context->err_recognition =
223 var_InheritInteger( p_dec, "avcodec-error-resilience" );
225 if( var_CreateGetBool( p_dec, "grayscale" ) )
226 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
228 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
229 if( i_val ) p_sys->p_context->debug_mv = 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 != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
296 p_sys->i_codec_id != AV_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 p_sys->p_context->get_format = ffmpeg_GetFormat;
317 /* Always use our get_buffer wrapper so we can calculate the
319 #if LIBAVCODEC_VERSION_MAJOR >= 55
320 p_sys->p_context->get_buffer2 = lavc_GetFrame;
322 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
323 p_sys->p_context->reget_buffer = avcodec_default_reget_buffer;
324 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
326 p_sys->p_context->opaque = p_dec;
328 #ifdef HAVE_AVCODEC_MT
329 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
330 if( i_thread_count <= 0 )
332 i_thread_count = vlc_GetCPUCount();
333 if( i_thread_count > 1 )
336 //FIXME: take in count the decoding time
337 i_thread_count = __MIN( i_thread_count, 4 );
339 i_thread_count = __MIN( i_thread_count, 16 );
340 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
341 p_sys->p_context->thread_count = i_thread_count;
342 p_sys->p_context->thread_safe_callbacks = true;
346 case AV_CODEC_ID_MPEG4:
347 case AV_CODEC_ID_H263:
348 p_sys->p_context->thread_type = 0;
350 case AV_CODEC_ID_MPEG1VIDEO:
351 case AV_CODEC_ID_MPEG2VIDEO:
352 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
354 # if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0))
355 case AV_CODEC_ID_H264:
356 case AV_CODEC_ID_VC1:
357 case AV_CODEC_ID_WMV3:
358 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
362 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
363 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
366 /* ***** misc init ***** */
367 p_sys->i_pts = VLC_TS_INVALID;
368 p_sys->b_has_b_frames = false;
369 p_sys->b_first_frame = true;
370 p_sys->b_flush = false;
371 p_sys->i_late_frames = 0;
373 /* Set output properties */
374 p_dec->fmt_out.i_cat = VIDEO_ES;
375 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
377 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
378 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
380 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
382 #if LIBAVCODEC_VERSION_MAJOR < 54
384 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
385 if( p_dec->fmt_in.video.p_palette )
387 p_sys->palette.palette_changed = 1;
389 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
395 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
396 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
397 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
398 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
400 p_sys->palette.palette[i] = c.u;
402 p_sys->p_context->palctrl = &p_sys->palette;
404 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
405 if( p_dec->fmt_out.video.p_palette )
406 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
408 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
410 p_sys->p_context->palctrl = &p_sys->palette;
416 /* ***** init this codec with special data ***** */
417 ffmpeg_InitCodec( p_dec );
419 /* ***** Open the codec ***** */
420 if( ffmpeg_OpenCodec( p_dec ) < 0 )
422 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
423 av_free( p_sys->p_ff_pic );
424 vlc_sem_destroy( &p_sys->sem_mt );
432 /*****************************************************************************
433 * DecodeVideo: Called to decode one or more frames
434 *****************************************************************************/
435 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
437 decoder_sys_t *p_sys = p_dec->p_sys;
438 AVCodecContext *p_context = p_sys->p_context;
440 int b_null_size = false;
443 if( !pp_block || !*pp_block )
446 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
448 ffmpeg_InitCodec( p_dec );
449 if( p_sys->b_delayed_open )
451 if( ffmpeg_OpenCodec( p_dec ) )
452 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
457 if( p_sys->b_delayed_open )
459 block_Release( p_block );
463 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
465 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
467 p_sys->i_late_frames = 0;
470 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
471 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;
575 av_init_packet( &pkt );
576 pkt.data = p_block->p_buffer;
577 pkt.size = p_block->i_buffer;
578 pkt.pts = p_block->i_pts;
579 pkt.dts = p_block->i_dts;
581 /* Make sure we don't reuse the same timestamps twice */
583 p_block->i_dts = VLC_TS_INVALID;
585 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
586 &b_gotpicture, &pkt );
588 if( b_null_size && !p_sys->b_flush &&
589 p_context->width > 0 && p_context->height > 0 )
591 /* Reparse it to not drop the I frame */
593 if( p_sys->b_hurry_up )
594 p_context->skip_frame = p_sys->i_skip_frame;
595 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
596 &b_gotpicture, &pkt );
601 p_sys->b_first_frame = true;
603 if( p_block->i_buffer <= 0 )
604 p_sys->b_flush = false;
609 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
611 block_Release( p_block );
614 else if( (unsigned)i_used > p_block->i_buffer ||
615 p_context->thread_count > 1 )
617 i_used = p_block->i_buffer;
621 p_block->i_buffer -= i_used;
622 p_block->p_buffer += i_used;
624 /* Nothing to display */
627 if( i_used == 0 ) break;
631 /* Sanity check (seems to be needed for some streams) */
632 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
634 p_sys->b_has_b_frames = true;
637 /* Compute the PTS */
639 p_sys->p_ff_pic->pkt_pts;
640 if (i_pts <= VLC_TS_INVALID)
641 i_pts = p_sys->p_ff_pic->pkt_dts;
643 if( i_pts <= VLC_TS_INVALID )
644 i_pts = p_sys->i_pts;
646 /* Interpolate the next PTS */
647 if( i_pts > VLC_TS_INVALID )
648 p_sys->i_pts = i_pts;
649 if( p_sys->i_pts > VLC_TS_INVALID )
651 /* interpolate the next PTS */
652 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
653 p_dec->fmt_in.video.i_frame_rate_base > 0 )
655 p_sys->i_pts += INT64_C(1000000) *
656 (2 + p_sys->p_ff_pic->repeat_pict) *
657 p_dec->fmt_in.video.i_frame_rate_base /
658 (2 * p_dec->fmt_in.video.i_frame_rate);
660 else if( p_context->time_base.den > 0 )
662 int i_tick = p_context->ticks_per_frame;
666 p_sys->i_pts += INT64_C(1000000) *
667 (2 + p_sys->p_ff_pic->repeat_pict) *
668 i_tick * p_context->time_base.num /
669 (2 * p_context->time_base.den);
673 /* Update frame late count (except when doing preroll) */
674 mtime_t i_display_date = 0;
675 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
676 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
678 if( i_display_date > 0 && i_display_date <= mdate() )
680 p_sys->i_late_frames++;
681 if( p_sys->i_late_frames == 1 )
682 p_sys->i_late_frames_start = mdate();
686 p_sys->i_late_frames = 0;
689 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
692 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
694 /* Get a new picture */
695 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
698 block_Release( p_block );
702 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
704 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
708 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
709 decoder_LinkPicture( p_dec, p_pic );
712 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
714 /* Fetch again the aspect ratio in case it changed */
715 p_dec->fmt_out.video.i_sar_num
716 = p_context->sample_aspect_ratio.num;
717 p_dec->fmt_out.video.i_sar_den
718 = p_context->sample_aspect_ratio.den;
720 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
722 p_dec->fmt_out.video.i_sar_num = 1;
723 p_dec->fmt_out.video.i_sar_den = 1;
727 /* Send decoded frame to vout */
728 if( i_pts > VLC_TS_INVALID)
732 if( p_sys->b_first_frame )
734 /* Hack to force display of still pictures */
735 p_sys->b_first_frame = false;
736 p_pic->b_force = true;
739 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
740 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
741 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
747 decoder_DeletePicture( p_dec, p_pic );
751 block_Release( p_block );
755 /*****************************************************************************
756 * EndVideo: decoder destruction
757 *****************************************************************************
758 * This function is called when the thread ends after a successful
760 *****************************************************************************/
761 void EndVideoDec( decoder_t *p_dec )
763 decoder_sys_t *p_sys = p_dec->p_sys;
767 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
768 if( p_sys->p_context->codec )
769 avcodec_flush_buffers( p_sys->p_context );
773 if( p_sys->p_ff_pic )
774 av_free( p_sys->p_ff_pic );
777 vlc_va_Delete( p_sys->p_va );
779 vlc_sem_destroy( &p_sys->sem_mt );
782 /*****************************************************************************
783 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
784 *****************************************************************************/
785 static void ffmpeg_InitCodec( decoder_t *p_dec )
787 decoder_sys_t *p_sys = p_dec->p_sys;
788 int i_size = p_dec->fmt_in.i_extra;
790 if( !i_size ) return;
792 if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
796 p_sys->p_context->extradata_size = i_size + 12;
797 p = p_sys->p_context->extradata =
798 malloc( p_sys->p_context->extradata_size );
802 memcpy( &p[0], "SVQ3", 4 );
803 memset( &p[4], 0, 8 );
804 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
806 /* Now remove all atoms before the SMI one */
807 if( p_sys->p_context->extradata_size > 0x5a &&
808 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
810 uint8_t *psz = &p[0x52];
812 while( psz < &p[p_sys->p_context->extradata_size - 8] )
814 int i_size = GetDWBE( psz );
817 /* FIXME handle 1 as long size */
820 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
822 memmove( &p[0x52], psz,
823 &p[p_sys->p_context->extradata_size] - psz );
833 p_sys->p_context->extradata_size = i_size;
834 p_sys->p_context->extradata =
835 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
836 if( p_sys->p_context->extradata )
838 memcpy( p_sys->p_context->extradata,
839 p_dec->fmt_in.p_extra, i_size );
840 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
841 0, FF_INPUT_BUFFER_PADDING_SIZE );
846 /*****************************************************************************
847 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
848 * picture_t structure (when not in direct rendering mode).
849 *****************************************************************************/
850 static void ffmpeg_CopyPicture( decoder_t *p_dec,
851 picture_t *p_pic, AVFrame *p_ff_pic )
853 decoder_sys_t *p_sys = p_dec->p_sys;
857 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic->opaque,
860 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
862 int i_plane, i_size, i_line;
863 uint8_t *p_dst, *p_src;
864 int i_src_stride, i_dst_stride;
866 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
868 p_src = p_ff_pic->data[i_plane];
869 p_dst = p_pic->p[i_plane].p_pixels;
870 i_src_stride = p_ff_pic->linesize[i_plane];
871 i_dst_stride = p_pic->p[i_plane].i_pitch;
873 i_size = __MIN( i_src_stride, i_dst_stride );
874 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
877 memcpy( p_dst, p_src, i_size );
878 p_src += i_src_stride;
879 p_dst += i_dst_stride;
885 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
886 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
887 p_sys->p_context->pix_fmt, name ? name : "unknown" );
892 #if LIBAVCODEC_VERSION_MAJOR >= 55
893 static int lavc_va_GetFrame(struct AVCodecContext *ctx, AVFrame *frame,
896 decoder_t *dec = ctx->opaque;
897 decoder_sys_t *sys = dec->p_sys;
898 vlc_va_t *va = sys->p_va;
900 if (vlc_va_Setup(va, &ctx->hwaccel_context, &dec->fmt_out.video.i_chroma,
901 ctx->coded_width, ctx->coded_height))
903 msg_Err(dec, "hardware acceleration setup failed");
906 if (vlc_va_Get(va, &frame->opaque, &frame->data[0]))
908 msg_Err(dec, "hardware acceleration picture allocation failed");
911 /* data[0] must be non-NULL for libavcodec internal checks.
912 * data[3] actually contains the format-specific surface handle. */
913 frame->data[3] = frame->data[0];
915 frame->buf[0] = av_buffer_create(frame->data[0], 0, va->release,
917 if (unlikely(frame->buf[0] == NULL))
919 vlc_va_Release(va, frame->opaque, frame->data[0]);
922 assert(frame->data[0] != NULL);
933 static void lavc_dr_ReleaseFrame(void *opaque, uint8_t *data)
935 lavc_pic_ref_t *ref = opaque;
937 decoder_UnlinkPicture(ref->decoder, ref->picture);
942 static picture_t *lavc_dr_GetFrame(struct AVCodecContext *ctx,
943 AVFrame *frame, int flags)
945 decoder_t *dec = (decoder_t *)ctx->opaque;
947 if (GetVlcChroma(&dec->fmt_out.video, ctx->pix_fmt) != VLC_SUCCESS)
949 dec->fmt_out.i_codec = dec->fmt_out.video.i_chroma;
950 if (ctx->pix_fmt == PIX_FMT_PAL8)
953 int width = frame->width;
954 int height = frame->height;
955 int aligns[AV_NUM_DATA_POINTERS];
957 avcodec_align_dimensions2(ctx, &width, &height, aligns);
959 picture_t *pic = ffmpeg_NewPictBuf(dec, ctx);
963 /* Check that the picture is suitable for libavcodec */
964 if (pic->p[0].i_pitch < width * pic->p[0].i_pixel_pitch)
966 msg_Dbg(dec, "plane 0: pitch too small (%d/%d*%d)",
967 pic->p[0].i_pitch, width, pic->p[0].i_pixel_pitch);
971 if (pic->p[0].i_lines < height)
973 msg_Dbg(dec, "plane 0: lines too few (%d/%d)",
974 pic->p[0].i_lines, height);
978 for (int i = 0; i < pic->i_planes; i++)
980 if (pic->p[i].i_pitch % aligns[i])
982 msg_Dbg(dec, "plane %d: pitch not aligned (%d%%%d)",
983 i, pic->p[i].i_pitch, aligns[i]);
986 if (((uintptr_t)pic->p[i].p_pixels) % aligns[i])
988 msg_Warn(dec, "plane %d not aligned", i);
993 /* Allocate buffer references */
994 for (int i = 0; i < pic->i_planes; i++)
996 lavc_pic_ref_t *ref = malloc(sizeof (*ref));
1001 decoder_LinkPicture(dec, pic);
1003 uint8_t *data = pic->p[i].p_pixels;
1004 int size = pic->p[i].i_pitch * pic->p[i].i_lines;
1006 frame->buf[i] = av_buffer_create(data, size, lavc_dr_ReleaseFrame,
1008 if (unlikely(frame->buf[i] == NULL))
1010 lavc_dr_ReleaseFrame(ref, data);
1014 decoder_UnlinkPicture(dec, pic);
1018 for (unsigned i = 0; frame->buf[i] != NULL; i++)
1019 av_buffer_unref(&frame->buf[i]);
1021 decoder_DeletePicture(dec, pic);
1026 * Callback used by libavcodec to get a frame buffer.
1028 * It is used for direct rendering as well as to get the right PTS for each
1029 * decoded picture (even in indirect rendering mode).
1031 static int lavc_GetFrame(struct AVCodecContext *ctx, AVFrame *frame, int flags)
1033 decoder_t *dec = ctx->opaque;
1034 decoder_sys_t *sys = dec->p_sys;
1037 for (unsigned i = 0; i < AV_NUM_DATA_POINTERS; i++)
1039 frame->data[i] = NULL;
1040 frame->linesize[i] = 0;
1041 frame->buf[i] = NULL;
1044 if (sys->p_va != NULL)
1045 return lavc_va_GetFrame(ctx, frame, flags);
1047 frame->opaque = NULL;
1048 if (!sys->b_direct_rendering)
1049 return avcodec_default_get_buffer2(ctx, frame, flags);
1051 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1052 * so we need to check for direct rendering again. */
1054 pic = lavc_dr_GetFrame(ctx, frame, flags);
1057 if (sys->i_direct_rendering_used != 0)
1059 msg_Warn(dec, "disabling direct rendering");
1060 sys->i_direct_rendering_used = 0;
1063 return avcodec_default_get_buffer2(ctx, frame, flags);
1066 if (sys->i_direct_rendering_used != 1)
1068 msg_Dbg(dec, "enabling direct rendering");
1069 sys->i_direct_rendering_used = 1;
1073 frame->opaque = pic;
1074 static_assert(PICTURE_PLANE_MAX <= AV_NUM_DATA_POINTERS, "Oops!");
1075 for (unsigned i = 0; i < PICTURE_PLANE_MAX; i++)
1077 frame->data[i] = pic->p[i].p_pixels;
1078 frame->linesize[i] = pic->p[i].i_pitch;
1083 static int ffmpeg_va_GetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1085 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1086 decoder_sys_t *p_sys = p_dec->p_sys;
1087 vlc_va_t *p_va = p_sys->p_va;
1089 /* hwaccel_context is not present in old ffmpeg version */
1090 if( vlc_va_Setup( p_va,
1091 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
1092 p_context->coded_width, p_context->coded_height ) )
1094 msg_Err( p_dec, "vlc_va_Setup failed" );
1098 if( vlc_va_Get( p_va, &p_ff_pic->opaque, &p_ff_pic->data[0] ) )
1100 msg_Err( p_dec, "vlc_va_Get failed" );
1104 p_ff_pic->data[3] = p_ff_pic->data[0];
1105 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1109 static picture_t *ffmpeg_dr_GetFrameBuf(struct AVCodecContext *p_context)
1111 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1112 decoder_sys_t *p_sys = p_dec->p_sys;
1114 int i_width = p_context->width;
1115 int i_height = p_context->height;
1116 avcodec_align_dimensions( p_context, &i_width, &i_height );
1118 picture_t *p_pic = NULL;
1119 if (GetVlcChroma(&p_dec->fmt_out.video, p_context->pix_fmt) != VLC_SUCCESS)
1122 if (p_context->pix_fmt == PIX_FMT_PAL8)
1125 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1127 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1131 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1132 p_pic->p[0].i_lines < i_height )
1135 for( int i = 0; i < p_pic->i_planes; i++ )
1138 switch( p_sys->i_codec_id )
1140 case AV_CODEC_ID_SVQ1:
1141 case AV_CODEC_ID_VP5:
1142 case AV_CODEC_ID_VP6:
1143 case AV_CODEC_ID_VP6F:
1144 case AV_CODEC_ID_VP6A:
1148 i_align = i == 0 ? 16 : 8;
1151 if( p_pic->p[i].i_pitch % i_align )
1153 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1157 if( p_context->pix_fmt == PIX_FMT_YUV422P )
1159 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1160 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1168 decoder_DeletePicture( p_dec, p_pic );
1173 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
1176 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1177 decoder_sys_t *p_sys = p_dec->p_sys;
1180 p_ff_pic->opaque = NULL;
1181 #if ! LIBAVCODEC_VERSION_CHECK(54, 34, 0, 79, 101)
1182 p_ff_pic->pkt_pts = p_context->pkt ? p_context->pkt->pts : AV_NOPTS_VALUE;
1184 #if LIBAVCODEC_VERSION_MAJOR < 54
1185 p_ff_pic->age = 256*256*256*64;
1189 return ffmpeg_va_GetFrameBuf(p_context, p_ff_pic);
1191 if( !p_sys->b_direct_rendering )
1192 return avcodec_default_get_buffer( p_context, p_ff_pic );
1195 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
1196 * so we need to check for direct rendering again. */
1198 picture_t *p_pic = ffmpeg_dr_GetFrameBuf(p_context);
1200 if( p_sys->i_direct_rendering_used != 0 )
1202 msg_Warn( p_dec, "disabling direct rendering" );
1203 p_sys->i_direct_rendering_used = 0;
1207 return avcodec_default_get_buffer( p_context, p_ff_pic );
1210 if( p_sys->i_direct_rendering_used != 1 ) {
1211 msg_Dbg( p_dec, "using direct rendering" );
1212 p_sys->i_direct_rendering_used = 1;
1215 p_context->draw_horiz_band = NULL;
1218 p_ff_pic->opaque = (void*)p_pic;
1219 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1220 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1221 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1222 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1223 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1225 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1226 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1227 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1228 p_ff_pic->linesize[3] = 0;
1233 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1236 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1237 decoder_sys_t *p_sys = p_dec->p_sys;
1240 vlc_va_Release( p_sys->p_va, p_ff_pic->opaque, p_ff_pic->data[0] );
1241 else if( p_ff_pic->opaque )
1242 decoder_UnlinkPicture( p_dec, (picture_t*)p_ff_pic->opaque);
1243 else if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1244 /* We can end up here without the AVFrame being allocated by
1245 * avcodec_default_get_buffer() if VA is used and the frame is
1246 * released when the decoder is closed
1248 avcodec_default_release_buffer( p_context, p_ff_pic );
1250 for( int i = 0; i < 4; i++ )
1251 p_ff_pic->data[i] = NULL;
1255 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1256 const enum PixelFormat *pi_fmt )
1258 decoder_t *p_dec = p_context->opaque;
1259 decoder_sys_t *p_sys = p_dec->p_sys;
1260 vlc_va_t *p_va = p_sys->p_va;
1263 vlc_va_Delete( p_va );
1265 /* Enumerate available formats */
1266 bool can_hwaccel = false;
1267 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1269 const AVPixFmtDescriptor *dsc = av_pix_fmt_desc_get(pi_fmt[i]);
1272 bool hwaccel = (dsc->flags & AV_PIX_FMT_FLAG_HWACCEL) != 0;
1274 msg_Dbg( p_dec, "available %sware decoder output format %d (%s)",
1275 hwaccel ? "hard" : "soft", pi_fmt[i], dsc->name );
1283 /* Profile and level informations are needed now.
1284 * TODO: avoid code duplication with avcodec.c */
1285 if( p_context->profile != FF_PROFILE_UNKNOWN)
1286 p_dec->fmt_in.i_profile = p_context->profile;
1287 if( p_context->level != FF_LEVEL_UNKNOWN)
1288 p_dec->fmt_in.i_level = p_context->level;
1290 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1294 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1296 if( p_va->pix_fmt != pi_fmt[i] )
1299 /* We try to call vlc_va_Setup when possible to detect errors when
1300 * possible (later is too late) */
1301 if( p_context->width > 0 && p_context->height > 0
1302 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1303 &p_dec->fmt_out.video.i_chroma,
1304 p_context->width, p_context->height ) )
1306 msg_Err( p_dec, "acceleration setup failure" );
1310 if( p_va->description )
1311 msg_Info( p_dec, "Using %s for hardware decoding.",
1312 p_va->description );
1314 /* FIXME this will disable direct rendering
1315 * even if a new pixel format is renegotiated
1317 p_sys->b_direct_rendering = false;
1319 p_context->draw_horiz_band = NULL;
1323 vlc_va_Delete( p_va );
1326 /* Fallback to default behaviour */
1328 return avcodec_default_get_format( p_context, pi_fmt );