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 void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
108 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
109 const enum PixelFormat * );
110 static void vlc_va_Delete( vlc_va_t * );
112 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
114 uint8_t *p = (uint8_t*)&fcc;
115 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
118 /*****************************************************************************
120 *****************************************************************************/
122 /* Returns a new picture buffer */
123 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
124 AVCodecContext *p_context )
126 decoder_sys_t *p_sys = p_dec->p_sys;
128 p_dec->fmt_out.video.i_width = p_context->width;
129 p_dec->fmt_out.video.i_height = p_context->height;
131 if( !p_context->width || !p_context->height )
133 return NULL; /* invalid display size */
136 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
138 /* we are doomed, but not really, because most codecs set their pix_fmt
140 * FIXME does it make sense here ? */
141 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
143 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
145 /* If an aspect-ratio was specified in the input format then force it */
146 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
148 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
149 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
153 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
154 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
156 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
158 p_dec->fmt_out.video.i_sar_num = 1;
159 p_dec->fmt_out.video.i_sar_den = 1;
163 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
164 p_dec->fmt_in.video.i_frame_rate_base > 0 )
166 p_dec->fmt_out.video.i_frame_rate =
167 p_dec->fmt_in.video.i_frame_rate;
168 p_dec->fmt_out.video.i_frame_rate_base =
169 p_dec->fmt_in.video.i_frame_rate_base;
171 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
173 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
174 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num * __MAX( p_context->ticks_per_frame, 1 );
177 return decoder_NewPicture( p_dec );
180 /*****************************************************************************
181 * InitVideo: initialize the video decoder
182 *****************************************************************************
183 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
184 * opened (done after the first decoded frame).
185 *****************************************************************************/
186 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
187 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
189 decoder_sys_t *p_sys;
192 /* Allocate the memory needed to store the decoder's structure */
193 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
196 p_codec->type = AVMEDIA_TYPE_VIDEO;
197 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
198 p_context->codec_id = i_codec_id;
199 p_sys->p_context = p_context;
200 p_sys->p_codec = p_codec;
201 p_sys->i_codec_id = i_codec_id;
202 p_sys->psz_namecodec = psz_namecodec;
203 p_sys->p_ff_pic = avcodec_alloc_frame();
204 p_sys->b_delayed_open = true;
206 vlc_sem_init( &p_sys->sem_mt, 0 );
208 /* ***** Fill p_context with init values ***** */
209 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
211 /* ***** Get configuration of ffmpeg plugin ***** */
212 p_sys->p_context->workaround_bugs =
213 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
214 p_sys->p_context->err_recognition =
215 var_InheritInteger( p_dec, "avcodec-error-resilience" );
217 if( var_CreateGetBool( p_dec, "grayscale" ) )
218 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
220 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
221 if( i_val ) p_sys->p_context->debug_mv = i_val;
223 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
224 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
225 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
226 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
227 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
229 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
230 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
232 #if LIBAVCODEC_VERSION_CHECK( 54, 41, 0, 91, 100 )
233 if( var_InheritBool( p_dec, "avcodec-ignorecrop" ) )
234 p_sys->p_context->flags2 |= CODEC_FLAG2_IGNORE_CROP;
237 /* ***** libavcodec frame skipping ***** */
238 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
240 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
243 p_sys->p_context->skip_frame = AVDISCARD_NONE;
246 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
249 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
252 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
255 p_sys->p_context->skip_frame = AVDISCARD_ALL;
258 p_sys->p_context->skip_frame = AVDISCARD_NONE;
261 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
263 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
266 p_sys->p_context->skip_idct = AVDISCARD_NONE;
269 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
272 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
275 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
278 p_sys->p_context->skip_idct = AVDISCARD_ALL;
281 p_sys->p_context->skip_idct = AVDISCARD_NONE;
284 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
286 /* ***** libavcodec direct rendering ***** */
287 p_sys->b_direct_rendering = false;
288 p_sys->i_direct_rendering_used = -1;
289 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
290 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
291 /* No idea why ... but this fixes flickering on some TSCC streams */
292 p_sys->i_codec_id != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
293 p_sys->i_codec_id != AV_CODEC_ID_CINEPAK &&
294 !p_sys->p_context->debug_mv )
296 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
297 * so we need to do another check in ffmpeg_GetFrameBuf() */
298 p_sys->b_direct_rendering = true;
301 /* libavcodec doesn't properly release old pictures when frames are skipped */
302 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
303 if( p_sys->b_direct_rendering )
305 msg_Dbg( p_dec, "trying to use direct rendering" );
306 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
310 msg_Dbg( p_dec, "direct rendering is disabled" );
313 /* Always use our get_buffer wrapper so we can calculate the
315 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
316 p_sys->p_context->reget_buffer = avcodec_default_reget_buffer;
317 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
318 p_sys->p_context->opaque = p_dec;
320 #ifdef HAVE_AVCODEC_MT
321 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
322 if( i_thread_count <= 0 )
324 i_thread_count = vlc_GetCPUCount();
325 if( i_thread_count > 1 )
328 //FIXME: take in count the decoding time
329 i_thread_count = __MIN( i_thread_count, 4 );
331 i_thread_count = __MIN( i_thread_count, 16 );
332 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
333 p_sys->p_context->thread_count = i_thread_count;
336 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
337 if( (hw == NULL || strcasecmp( hw, "none" )) &&
338 (i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ||
339 i_codec_id == AV_CODEC_ID_MPEG4 || i_codec_id == AV_CODEC_ID_H263 ||
340 i_codec_id == AV_CODEC_ID_H264 ||
341 i_codec_id == AV_CODEC_ID_VC1 || i_codec_id == AV_CODEC_ID_WMV3) )
343 #if defined(HAVE_AVCODEC_MT) && LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55, 1, 0)
344 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
346 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
347 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
349 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
350 ( i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ) )
352 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
353 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
356 p_sys->p_context->get_format = ffmpeg_GetFormat;
359 #ifdef HAVE_AVCODEC_MT
360 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
361 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
365 /* ***** misc init ***** */
366 p_sys->i_pts = VLC_TS_INVALID;
367 p_sys->b_has_b_frames = false;
368 p_sys->b_first_frame = true;
369 p_sys->b_flush = false;
370 p_sys->i_late_frames = 0;
372 /* Set output properties */
373 p_dec->fmt_out.i_cat = VIDEO_ES;
374 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
376 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
377 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
379 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
381 #if LIBAVCODEC_VERSION_MAJOR < 54
383 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
384 if( p_dec->fmt_in.video.p_palette )
386 p_sys->palette.palette_changed = 1;
388 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
394 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
395 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
396 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
397 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
399 p_sys->palette.palette[i] = c.u;
401 p_sys->p_context->palctrl = &p_sys->palette;
403 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
404 if( p_dec->fmt_out.video.p_palette )
405 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
407 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
409 p_sys->p_context->palctrl = &p_sys->palette;
415 /* ***** init this codec with special data ***** */
416 ffmpeg_InitCodec( p_dec );
418 /* ***** Open the codec ***** */
419 if( ffmpeg_OpenCodec( p_dec ) < 0 )
421 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
422 av_free( p_sys->p_ff_pic );
423 vlc_sem_destroy( &p_sys->sem_mt );
431 /*****************************************************************************
432 * DecodeVideo: Called to decode one or more frames
433 *****************************************************************************/
434 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
436 decoder_sys_t *p_sys = p_dec->p_sys;
437 AVCodecContext *p_context = p_sys->p_context;
439 int b_null_size = false;
442 if( !pp_block || !*pp_block )
445 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
447 ffmpeg_InitCodec( p_dec );
448 if( p_sys->b_delayed_open )
450 if( ffmpeg_OpenCodec( p_dec ) )
451 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
456 if( p_sys->b_delayed_open )
458 block_Release( p_block );
462 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
464 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
466 p_sys->i_late_frames = 0;
468 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
469 avcodec_flush_buffers( p_context );
471 block_Release( p_block );
475 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
477 /* Do not care about late frames when prerolling
478 * TODO avoid decoding of non reference frame
479 * (ie all B except for H264 where it depends only on nal_ref_idc) */
480 p_sys->i_late_frames = 0;
483 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
484 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
486 if( p_sys->i_pts > VLC_TS_INVALID )
488 msg_Err( p_dec, "more than 5 seconds of late video -> "
489 "dropping frame (computer too slow ?)" );
490 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
492 block_Release( p_block );
493 p_sys->i_late_frames--;
497 /* A good idea could be to decode all I pictures and see for the other */
498 if( !p_dec->b_pace_control &&
500 (p_sys->i_late_frames > 4) )
503 if( p_sys->i_late_frames < 12 )
505 p_context->skip_frame =
506 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
507 AVDISCARD_NONREF : p_sys->i_skip_frame;
511 /* picture too late, won't decode
512 * but break picture until a new I, and for mpeg4 ...*/
513 p_sys->i_late_frames--; /* needed else it will never be decrease */
514 block_Release( p_block );
520 if( p_sys->b_hurry_up )
521 p_context->skip_frame = p_sys->i_skip_frame;
522 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
528 if( p_context->width <= 0 || p_context->height <= 0 )
530 if( p_sys->b_hurry_up )
531 p_context->skip_frame = p_sys->i_skip_frame;
534 else if( !b_drawpicture )
536 /* It creates broken picture
537 * FIXME either our parser or ffmpeg is broken */
539 if( p_sys->b_hurry_up )
540 p_context->skip_frame = __MAX( p_context->skip_frame,
546 * Do the actual decoding now */
548 /* Don't forget that libavcodec requires a little more bytes
549 * that the real frame size */
550 if( p_block->i_buffer > 0 )
552 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
554 p_block = block_Realloc( p_block, 0,
555 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
558 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
560 memset( p_block->p_buffer + p_block->i_buffer, 0,
561 FF_INPUT_BUFFER_PADDING_SIZE );
564 while( p_block->i_buffer > 0 || p_sys->b_flush )
566 int i_used, b_gotpicture;
572 av_init_packet( &pkt );
573 pkt.data = p_block->p_buffer;
574 pkt.size = p_block->i_buffer;
575 pkt.pts = p_block->i_pts;
576 pkt.dts = p_block->i_dts;
578 /* Make sure we don't reuse the same timestamps twice */
580 p_block->i_dts = VLC_TS_INVALID;
582 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
583 &b_gotpicture, &pkt );
585 if( b_null_size && !p_sys->b_flush &&
586 p_context->width > 0 && p_context->height > 0 )
588 /* Reparse it to not drop the I frame */
590 if( p_sys->b_hurry_up )
591 p_context->skip_frame = p_sys->i_skip_frame;
592 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
593 &b_gotpicture, &pkt );
598 p_sys->b_first_frame = true;
600 if( p_block->i_buffer <= 0 )
601 p_sys->b_flush = false;
606 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
608 block_Release( p_block );
611 else if( i_used > p_block->i_buffer ||
612 p_context->thread_count > 1 )
614 i_used = p_block->i_buffer;
618 p_block->i_buffer -= i_used;
619 p_block->p_buffer += i_used;
621 /* Nothing to display */
624 if( i_used == 0 ) break;
628 /* Sanity check (seems to be needed for some streams) */
629 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
631 p_sys->b_has_b_frames = true;
634 /* Compute the PTS */
636 p_sys->p_ff_pic->pkt_pts;
637 if (i_pts <= VLC_TS_INVALID)
638 i_pts = p_sys->p_ff_pic->pkt_dts;
640 if( i_pts <= VLC_TS_INVALID )
641 i_pts = p_sys->i_pts;
643 /* Interpolate the next PTS */
644 if( i_pts > VLC_TS_INVALID )
645 p_sys->i_pts = i_pts;
646 if( p_sys->i_pts > VLC_TS_INVALID )
648 /* interpolate the next PTS */
649 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
650 p_dec->fmt_in.video.i_frame_rate_base > 0 )
652 p_sys->i_pts += INT64_C(1000000) *
653 (2 + p_sys->p_ff_pic->repeat_pict) *
654 p_dec->fmt_in.video.i_frame_rate_base /
655 (2 * p_dec->fmt_in.video.i_frame_rate);
657 else if( p_context->time_base.den > 0 )
659 int i_tick = p_context->ticks_per_frame;
663 p_sys->i_pts += INT64_C(1000000) *
664 (2 + p_sys->p_ff_pic->repeat_pict) *
665 i_tick * p_context->time_base.num /
666 (2 * p_context->time_base.den);
670 /* Update frame late count (except when doing preroll) */
671 mtime_t i_display_date = 0;
672 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
673 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
675 if( i_display_date > 0 && i_display_date <= mdate() )
677 p_sys->i_late_frames++;
678 if( p_sys->i_late_frames == 1 )
679 p_sys->i_late_frames_start = mdate();
683 p_sys->i_late_frames = 0;
686 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
689 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
691 /* Get a new picture */
692 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
695 block_Release( p_block );
699 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
701 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
705 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
706 decoder_LinkPicture( p_dec, p_pic );
709 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
711 /* Fetch again the aspect ratio in case it changed */
712 p_dec->fmt_out.video.i_sar_num
713 = p_context->sample_aspect_ratio.num;
714 p_dec->fmt_out.video.i_sar_den
715 = p_context->sample_aspect_ratio.den;
717 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
719 p_dec->fmt_out.video.i_sar_num = 1;
720 p_dec->fmt_out.video.i_sar_den = 1;
724 /* Send decoded frame to vout */
725 if( i_pts > VLC_TS_INVALID)
729 if( p_sys->b_first_frame )
731 /* Hack to force display of still pictures */
732 p_sys->b_first_frame = false;
733 p_pic->b_force = true;
736 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
737 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
738 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
744 decoder_DeletePicture( p_dec, p_pic );
748 block_Release( p_block );
752 /*****************************************************************************
753 * EndVideo: decoder destruction
754 *****************************************************************************
755 * This function is called when the thread ends after a successful
757 *****************************************************************************/
758 void EndVideoDec( decoder_t *p_dec )
760 decoder_sys_t *p_sys = p_dec->p_sys;
764 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
765 if( p_sys->p_context->codec )
766 avcodec_flush_buffers( p_sys->p_context );
770 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
774 vlc_va_Delete( p_sys->p_va );
777 vlc_sem_destroy( &p_sys->sem_mt );
780 /*****************************************************************************
781 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
782 *****************************************************************************/
783 static void ffmpeg_InitCodec( decoder_t *p_dec )
785 decoder_sys_t *p_sys = p_dec->p_sys;
786 int i_size = p_dec->fmt_in.i_extra;
788 if( !i_size ) return;
790 if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
794 p_sys->p_context->extradata_size = i_size + 12;
795 p = p_sys->p_context->extradata =
796 malloc( p_sys->p_context->extradata_size );
800 memcpy( &p[0], "SVQ3", 4 );
801 memset( &p[4], 0, 8 );
802 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
804 /* Now remove all atoms before the SMI one */
805 if( p_sys->p_context->extradata_size > 0x5a &&
806 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
808 uint8_t *psz = &p[0x52];
810 while( psz < &p[p_sys->p_context->extradata_size - 8] )
812 int i_size = GetDWBE( psz );
815 /* FIXME handle 1 as long size */
818 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
820 memmove( &p[0x52], psz,
821 &p[p_sys->p_context->extradata_size] - psz );
831 p_sys->p_context->extradata_size = i_size;
832 p_sys->p_context->extradata =
833 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
834 if( p_sys->p_context->extradata )
836 memcpy( p_sys->p_context->extradata,
837 p_dec->fmt_in.p_extra, i_size );
838 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
839 0, FF_INPUT_BUFFER_PADDING_SIZE );
844 /*****************************************************************************
845 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
846 * picture_t structure (when not in direct rendering mode).
847 *****************************************************************************/
848 static void ffmpeg_CopyPicture( decoder_t *p_dec,
849 picture_t *p_pic, AVFrame *p_ff_pic )
851 decoder_sys_t *p_sys = p_dec->p_sys;
855 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
857 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
859 int i_plane, i_size, i_line;
860 uint8_t *p_dst, *p_src;
861 int i_src_stride, i_dst_stride;
863 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
865 p_src = p_ff_pic->data[i_plane];
866 p_dst = p_pic->p[i_plane].p_pixels;
867 i_src_stride = p_ff_pic->linesize[i_plane];
868 i_dst_stride = p_pic->p[i_plane].i_pitch;
870 i_size = __MIN( i_src_stride, i_dst_stride );
871 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
874 memcpy( p_dst, p_src, i_size );
875 p_src += i_src_stride;
876 p_dst += i_dst_stride;
882 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
883 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
884 p_sys->p_context->pix_fmt, name ? name : "unknown" );
889 /*****************************************************************************
890 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
891 *****************************************************************************
892 * It is used for direct rendering as well as to get the right PTS for each
893 * decoded picture (even in indirect rendering mode).
894 *****************************************************************************/
895 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
898 decoder_t *p_dec = (decoder_t *)p_context->opaque;
899 decoder_sys_t *p_sys = p_dec->p_sys;
903 p_ff_pic->opaque = NULL;
907 /* hwaccel_context is not present in old ffmpeg version */
908 if( vlc_va_Setup( p_sys->p_va,
909 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
910 p_context->width, p_context->height ) )
912 msg_Err( p_dec, "vlc_va_Setup failed" );
917 p_ff_pic->type = FF_BUFFER_TYPE_USER;
919 #if LIBAVCODEC_VERSION_MAJOR < 54
920 p_ff_pic->age = 256*256*256*64;
923 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
925 msg_Err( p_dec, "VaGrabSurface failed" );
930 else if( !p_sys->b_direct_rendering )
932 /* Not much to do in indirect rendering mode. */
933 return avcodec_default_get_buffer( p_context, p_ff_pic );
937 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
938 * so we need to check for direct rendering again. */
940 int i_width = p_context->width;
941 int i_height = p_context->height;
942 avcodec_align_dimensions( p_context, &i_width, &i_height );
944 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
945 p_context->pix_fmt == PIX_FMT_PAL8 )
948 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
950 /* Get a new picture */
951 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
954 bool b_compatible = true;
955 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
956 p_pic->p[0].i_lines < i_height )
957 b_compatible = false;
958 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
961 switch( p_sys->i_codec_id )
963 case AV_CODEC_ID_SVQ1:
964 case AV_CODEC_ID_VP5:
965 case AV_CODEC_ID_VP6:
966 case AV_CODEC_ID_VP6F:
967 case AV_CODEC_ID_VP6A:
971 i_align = i == 0 ? 16 : 8;
974 if( p_pic->p[i].i_pitch % i_align )
975 b_compatible = false;
976 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
977 b_compatible = false;
979 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
981 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
982 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
983 b_compatible = false;
987 decoder_DeletePicture( p_dec, p_pic );
991 if( p_sys->i_direct_rendering_used != 1 )
993 msg_Dbg( p_dec, "using direct rendering" );
994 p_sys->i_direct_rendering_used = 1;
997 p_context->draw_horiz_band = NULL;
999 p_ff_pic->opaque = (void*)p_pic;
1000 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1001 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1002 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1003 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1004 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1006 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1007 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1008 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1009 p_ff_pic->linesize[3] = 0;
1011 #if LIBAVCODEC_VERSION_MAJOR < 54
1012 p_ff_pic->age = 256*256*256*64;
1019 if( p_sys->i_direct_rendering_used != 0 )
1021 msg_Warn( p_dec, "disabling direct rendering" );
1022 p_sys->i_direct_rendering_used = 0;
1025 return avcodec_default_get_buffer( p_context, p_ff_pic );
1028 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1031 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1032 decoder_sys_t *p_sys = p_dec->p_sys;
1036 vlc_va_Release( p_sys->p_va, p_ff_pic );
1038 else if( !p_ff_pic->opaque )
1040 /* We can end up here without the AVFrame being allocated by
1041 * avcodec_default_get_buffer() if VA is used and the frame is
1042 * released when the decoder is closed
1044 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1045 avcodec_default_release_buffer( p_context, p_ff_pic );
1049 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1051 decoder_UnlinkPicture( p_dec, p_pic );
1053 for( int i = 0; i < 4; i++ )
1054 p_ff_pic->data[i] = NULL;
1057 static int ffmpeg_va_Start( void *func, va_list ap )
1059 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1060 int codec = va_arg( ap, int );
1061 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1062 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1064 return open( va, codec, fmt );
1067 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1068 const es_format_t *fmt )
1070 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1071 if( unlikely(p_va == NULL) )
1074 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1075 true, ffmpeg_va_Start, p_va,
1077 if( p_va->module == NULL )
1079 vlc_object_release( p_va );
1085 static void ffmpeg_va_Stop( void *func, va_list ap )
1087 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1088 void (*close)( vlc_va_t * ) = func;
1093 static void vlc_va_Delete( vlc_va_t *va )
1095 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1096 vlc_object_release( va );
1099 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1100 const enum PixelFormat *pi_fmt )
1102 decoder_t *p_dec = p_context->opaque;
1103 decoder_sys_t *p_sys = p_dec->p_sys;
1104 vlc_va_t *p_va = p_sys->p_va;
1107 vlc_va_Delete( p_va );
1109 /* Profile and level informations are needed now.
1110 * TODO: avoid code duplication with avcodec.c */
1111 if( p_context->profile != FF_PROFILE_UNKNOWN)
1112 p_dec->fmt_in.i_profile = p_context->profile;
1113 if( p_context->level != FF_LEVEL_UNKNOWN)
1114 p_dec->fmt_in.i_level = p_context->level;
1116 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1119 /* Try too look for a supported hw acceleration */
1120 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1122 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1123 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1124 pi_fmt[i], name ? name : "unknown" );
1125 if( p_va->pix_fmt != pi_fmt[i] )
1128 /* We try to call vlc_va_Setup when possible to detect errors when
1129 * possible (later is too late) */
1130 if( p_context->width > 0 && p_context->height > 0
1131 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1132 &p_dec->fmt_out.video.i_chroma,
1133 p_context->width, p_context->height ) )
1135 msg_Err( p_dec, "acceleration setup failure" );
1139 if( p_va->description )
1140 msg_Info( p_dec, "Using %s for hardware decoding.",
1141 p_va->description );
1143 /* FIXME this will disable direct rendering
1144 * even if a new pixel format is renegotiated
1146 p_sys->b_direct_rendering = false;
1148 p_context->draw_horiz_band = NULL;
1152 msg_Err( p_dec, "acceleration not available" );
1153 vlc_va_Delete( p_va );
1157 /* Fallback to default behaviour */
1158 return avcodec_default_get_format( p_context, pi_fmt );