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 * );
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;
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 #if LIBAVCODEC_VERSION_MAJOR < 54
215 p_sys->p_context->error_recognition =
217 p_sys->p_context->err_recognition =
219 var_InheritInteger( p_dec, "avcodec-error-resilience" );
221 if( var_CreateGetBool( p_dec, "grayscale" ) )
222 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
224 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
225 if( i_val ) p_sys->p_context->debug_mv = i_val;
227 i_val = var_CreateGetInteger( p_dec, "avcodec-lowres" );
228 if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
230 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
231 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
232 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
233 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
234 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
236 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
237 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
239 /* ***** libavcodec frame skipping ***** */
240 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
242 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
245 p_sys->p_context->skip_frame = AVDISCARD_NONE;
248 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
251 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
254 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
257 p_sys->p_context->skip_frame = AVDISCARD_ALL;
260 p_sys->p_context->skip_frame = AVDISCARD_NONE;
263 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
265 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
268 p_sys->p_context->skip_idct = AVDISCARD_NONE;
271 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
274 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
277 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
280 p_sys->p_context->skip_idct = AVDISCARD_ALL;
283 p_sys->p_context->skip_idct = AVDISCARD_NONE;
286 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
288 /* ***** libavcodec direct rendering ***** */
289 p_sys->b_direct_rendering = false;
290 p_sys->i_direct_rendering_used = -1;
291 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
292 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
293 /* No idea why ... but this fixes flickering on some TSCC streams */
294 p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD &&
295 p_sys->i_codec_id != CODEC_ID_CINEPAK &&
296 !p_sys->p_context->debug_mv )
298 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
299 * so we need to do another check in ffmpeg_GetFrameBuf() */
300 p_sys->b_direct_rendering = true;
303 /* libavcodec doesn't properly release old pictures when frames are skipped */
304 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
305 if( p_sys->b_direct_rendering )
307 msg_Dbg( p_dec, "trying to use direct rendering" );
308 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
312 msg_Dbg( p_dec, "direct rendering is disabled" );
315 /* Always use our get_buffer wrapper so we can calculate the
317 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
318 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
319 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
320 p_sys->p_context->opaque = p_dec;
322 #ifdef HAVE_AVCODEC_MT
323 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
324 if( i_thread_count <= 0 )
326 i_thread_count = vlc_GetCPUCount();
327 if( i_thread_count > 1 )
330 //FIXME: take in count the decoding time
331 i_thread_count = __MIN( i_thread_count, 4 );
333 i_thread_count = __MIN( i_thread_count, 16 );
334 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
335 p_sys->p_context->thread_count = i_thread_count;
338 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
339 if( (hw == NULL || strcasecmp( hw, "none" )) &&
340 (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
341 i_codec_id == CODEC_ID_MPEG4 ||
342 i_codec_id == CODEC_ID_H264 ||
343 i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
345 #ifdef HAVE_AVCODEC_MT
346 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
348 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
349 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
351 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
352 ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) )
354 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
355 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
358 p_sys->p_context->get_format = ffmpeg_GetFormat;
361 #ifdef HAVE_AVCODEC_MT
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;
367 /* ***** misc init ***** */
368 p_sys->i_pts = VLC_TS_INVALID;
369 p_sys->b_has_b_frames = false;
370 p_sys->b_first_frame = true;
371 p_sys->b_flush = false;
372 p_sys->i_late_frames = 0;
374 /* Set output properties */
375 p_dec->fmt_out.i_cat = VIDEO_ES;
376 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
378 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
379 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
381 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
383 #if LIBAVCODEC_VERSION_MAJOR < 54
385 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
386 if( p_dec->fmt_in.video.p_palette )
388 p_sys->palette.palette_changed = 1;
390 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
396 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
397 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
398 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
399 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
401 p_sys->palette.palette[i] = c.u;
403 p_sys->p_context->palctrl = &p_sys->palette;
405 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
406 if( p_dec->fmt_out.video.p_palette )
407 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
409 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
411 p_sys->p_context->palctrl = &p_sys->palette;
417 /* ***** init this codec with special data ***** */
418 ffmpeg_InitCodec( p_dec );
420 /* ***** Open the codec ***** */
421 if( ffmpeg_OpenCodec( p_dec ) < 0 )
423 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
424 av_free( p_sys->p_ff_pic );
425 vlc_sem_destroy( &p_sys->sem_mt );
433 /*****************************************************************************
434 * DecodeVideo: Called to decode one or more frames
435 *****************************************************************************/
436 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
438 decoder_sys_t *p_sys = p_dec->p_sys;
439 AVCodecContext *p_context = p_sys->p_context;
441 int b_null_size = false;
444 if( !pp_block || !*pp_block )
447 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
449 ffmpeg_InitCodec( p_dec );
450 if( p_sys->b_delayed_open )
452 if( ffmpeg_OpenCodec( p_dec ) )
453 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
458 if( p_sys->b_delayed_open )
460 block_Release( p_block );
464 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
466 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
468 p_sys->i_late_frames = 0;
470 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
471 avcodec_flush_buffers( p_context );
473 block_Release( p_block );
477 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
479 /* Do not care about late frames when prerolling
480 * TODO avoid decoding of non reference frame
481 * (ie all B except for H264 where it depends only on nal_ref_idc) */
482 p_sys->i_late_frames = 0;
485 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
486 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
488 if( p_sys->i_pts > VLC_TS_INVALID )
490 msg_Err( p_dec, "more than 5 seconds of late video -> "
491 "dropping frame (computer too slow ?)" );
492 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
494 block_Release( p_block );
495 p_sys->i_late_frames--;
499 /* A good idea could be to decode all I pictures and see for the other */
500 if( !p_dec->b_pace_control &&
502 (p_sys->i_late_frames > 4) )
505 if( p_sys->i_late_frames < 12 )
507 p_context->skip_frame =
508 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
509 AVDISCARD_NONREF : p_sys->i_skip_frame;
513 /* picture too late, won't decode
514 * but break picture until a new I, and for mpeg4 ...*/
515 p_sys->i_late_frames--; /* needed else it will never be decrease */
516 block_Release( p_block );
522 if( p_sys->b_hurry_up )
523 p_context->skip_frame = p_sys->i_skip_frame;
524 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
530 if( p_context->width <= 0 || p_context->height <= 0 )
532 if( p_sys->b_hurry_up )
533 p_context->skip_frame = p_sys->i_skip_frame;
536 else if( !b_drawpicture )
538 /* It creates broken picture
539 * FIXME either our parser or ffmpeg is broken */
541 if( p_sys->b_hurry_up )
542 p_context->skip_frame = __MAX( p_context->skip_frame,
548 * Do the actual decoding now */
550 /* Don't forget that libavcodec requires a little more bytes
551 * that the real frame size */
552 if( p_block->i_buffer > 0 )
554 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
556 p_block = block_Realloc( p_block, 0,
557 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
560 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
562 memset( p_block->p_buffer + p_block->i_buffer, 0,
563 FF_INPUT_BUFFER_PADDING_SIZE );
566 while( p_block->i_buffer > 0 || p_sys->b_flush )
568 int i_used, b_gotpicture;
572 /* Set the PTS/DTS in the context reordered_opaque field */
573 if( p_block->i_pts > VLC_TS_INVALID )
574 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
575 else if( p_block->i_dts > VLC_TS_INVALID )
576 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
578 p_context->reordered_opaque = INT64_MIN;
579 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
581 /* Make sure we don't reuse the same timestamps twice */
583 p_block->i_dts = VLC_TS_INVALID;
587 av_init_packet( &pkt );
588 pkt.data = p_block->p_buffer;
589 pkt.size = p_block->i_buffer;
590 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
591 &b_gotpicture, &pkt );
593 if( b_null_size && !p_sys->b_flush &&
594 p_context->width > 0 && p_context->height > 0 )
596 /* Reparse it to not drop the I frame */
598 if( p_sys->b_hurry_up )
599 p_context->skip_frame = p_sys->i_skip_frame;
600 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
601 &b_gotpicture, &pkt );
606 p_sys->b_first_frame = true;
608 if( p_block->i_buffer <= 0 )
609 p_sys->b_flush = false;
614 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
616 block_Release( p_block );
619 else if( i_used > p_block->i_buffer ||
620 p_context->thread_count > 1 )
622 i_used = p_block->i_buffer;
626 p_block->i_buffer -= i_used;
627 p_block->p_buffer += i_used;
629 /* Nothing to display */
632 if( i_used == 0 ) break;
636 /* Sanity check (seems to be needed for some streams) */
637 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
639 p_sys->b_has_b_frames = true;
642 /* Compute the PTS */
643 mtime_t i_pts = VLC_TS_INVALID;
644 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
646 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
647 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
650 if( !p_context->has_b_frames ||
651 !p_sys->b_has_b_frames ||
652 !p_sys->p_ff_pic->reference ||
653 p_sys->i_pts <= VLC_TS_INVALID )
656 /* Guess what ? The rules are different for Real Video :( */
657 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
658 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
659 p_sys->b_has_b_frames )
661 i_pts = VLC_TS_INVALID;
662 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
670 if( i_pts <= VLC_TS_INVALID )
671 i_pts = p_sys->i_pts;
673 /* Interpolate the next PTS */
674 if( i_pts > VLC_TS_INVALID )
675 p_sys->i_pts = i_pts;
676 if( p_sys->i_pts > VLC_TS_INVALID )
678 /* interpolate the next PTS */
679 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
680 p_dec->fmt_in.video.i_frame_rate_base > 0 )
682 p_sys->i_pts += INT64_C(1000000) *
683 (2 + p_sys->p_ff_pic->repeat_pict) *
684 p_dec->fmt_in.video.i_frame_rate_base /
685 (2 * p_dec->fmt_in.video.i_frame_rate);
687 else if( p_context->time_base.den > 0 )
689 int i_tick = p_context->ticks_per_frame;
693 p_sys->i_pts += INT64_C(1000000) *
694 (2 + p_sys->p_ff_pic->repeat_pict) *
695 i_tick * p_context->time_base.num /
696 (2 * p_context->time_base.den);
700 /* Update frame late count (except when doing preroll) */
701 mtime_t i_display_date = 0;
702 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
703 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
705 if( i_display_date > 0 && i_display_date <= mdate() )
707 p_sys->i_late_frames++;
708 if( p_sys->i_late_frames == 1 )
709 p_sys->i_late_frames_start = mdate();
713 p_sys->i_late_frames = 0;
716 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
719 if( !p_sys->p_ff_pic->opaque )
721 /* Get a new picture */
722 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
725 block_Release( p_block );
729 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
731 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
735 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
736 decoder_LinkPicture( p_dec, p_pic );
739 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
741 /* Fetch again the aspect ratio in case it changed */
742 p_dec->fmt_out.video.i_sar_num
743 = p_context->sample_aspect_ratio.num;
744 p_dec->fmt_out.video.i_sar_den
745 = p_context->sample_aspect_ratio.den;
747 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
749 p_dec->fmt_out.video.i_sar_num = 1;
750 p_dec->fmt_out.video.i_sar_den = 1;
754 /* Send decoded frame to vout */
755 if( i_pts > VLC_TS_INVALID)
759 if( p_sys->b_first_frame )
761 /* Hack to force display of still pictures */
762 p_sys->b_first_frame = false;
763 p_pic->b_force = true;
766 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
767 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
768 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
770 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
771 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
772 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
773 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
774 p_pic->i_qstride * i_mb_h );
775 switch( p_sys->p_ff_pic->qscale_type )
777 case FF_QSCALE_TYPE_MPEG1:
778 p_pic->i_qtype = QTYPE_MPEG1;
780 case FF_QSCALE_TYPE_MPEG2:
781 p_pic->i_qtype = QTYPE_MPEG2;
783 case FF_QSCALE_TYPE_H264:
784 p_pic->i_qtype = QTYPE_H264;
792 decoder_DeletePicture( p_dec, p_pic );
796 block_Release( p_block );
800 /*****************************************************************************
801 * EndVideo: decoder destruction
802 *****************************************************************************
803 * This function is called when the thread ends after a successful
805 *****************************************************************************/
806 void EndVideoDec( decoder_t *p_dec )
808 decoder_sys_t *p_sys = p_dec->p_sys;
812 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
813 if( p_sys->p_context->codec )
814 avcodec_flush_buffers( p_sys->p_context );
818 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
822 vlc_va_Delete( p_sys->p_va );
825 vlc_sem_destroy( &p_sys->sem_mt );
828 /*****************************************************************************
829 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
830 *****************************************************************************/
831 static void ffmpeg_InitCodec( decoder_t *p_dec )
833 decoder_sys_t *p_sys = p_dec->p_sys;
834 int i_size = p_dec->fmt_in.i_extra;
836 if( !i_size ) return;
838 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
842 p_sys->p_context->extradata_size = i_size + 12;
843 p = p_sys->p_context->extradata =
844 malloc( p_sys->p_context->extradata_size );
848 memcpy( &p[0], "SVQ3", 4 );
849 memset( &p[4], 0, 8 );
850 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
852 /* Now remove all atoms before the SMI one */
853 if( p_sys->p_context->extradata_size > 0x5a &&
854 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
856 uint8_t *psz = &p[0x52];
858 while( psz < &p[p_sys->p_context->extradata_size - 8] )
860 int i_size = GetDWBE( psz );
863 /* FIXME handle 1 as long size */
866 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
868 memmove( &p[0x52], psz,
869 &p[p_sys->p_context->extradata_size] - psz );
879 p_sys->p_context->extradata_size = i_size;
880 p_sys->p_context->extradata =
881 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
882 if( p_sys->p_context->extradata )
884 memcpy( p_sys->p_context->extradata,
885 p_dec->fmt_in.p_extra, i_size );
886 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
887 0, FF_INPUT_BUFFER_PADDING_SIZE );
892 /*****************************************************************************
893 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
894 * picture_t structure (when not in direct rendering mode).
895 *****************************************************************************/
896 static void ffmpeg_CopyPicture( decoder_t *p_dec,
897 picture_t *p_pic, AVFrame *p_ff_pic )
899 decoder_sys_t *p_sys = p_dec->p_sys;
903 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
905 else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
907 int i_plane, i_size, i_line;
908 uint8_t *p_dst, *p_src;
909 int i_src_stride, i_dst_stride;
911 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
913 p_src = p_ff_pic->data[i_plane];
914 p_dst = p_pic->p[i_plane].p_pixels;
915 i_src_stride = p_ff_pic->linesize[i_plane];
916 i_dst_stride = p_pic->p[i_plane].i_pitch;
918 i_size = __MIN( i_src_stride, i_dst_stride );
919 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
922 memcpy( p_dst, p_src, i_size );
923 p_src += i_src_stride;
924 p_dst += i_dst_stride;
930 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
931 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
932 p_sys->p_context->pix_fmt, name ? name : "unknown" );
937 /*****************************************************************************
938 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
939 *****************************************************************************
940 * It is used for direct rendering as well as to get the right PTS for each
941 * decoded picture (even in indirect rendering mode).
942 *****************************************************************************/
943 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
946 decoder_t *p_dec = (decoder_t *)p_context->opaque;
947 decoder_sys_t *p_sys = p_dec->p_sys;
951 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
952 p_ff_pic->opaque = NULL;
956 /* hwaccel_context is not present in old ffmpeg version */
957 if( vlc_va_Setup( p_sys->p_va,
958 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
959 p_context->width, p_context->height ) )
961 msg_Err( p_dec, "vlc_va_Setup failed" );
966 p_ff_pic->type = FF_BUFFER_TYPE_USER;
968 #if LIBAVCODEC_VERSION_MAJOR < 54
969 p_ff_pic->age = 256*256*256*64;
972 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
974 msg_Err( p_dec, "VaGrabSurface failed" );
979 else if( !p_sys->b_direct_rendering )
981 /* Not much to do in indirect rendering mode. */
982 return avcodec_default_get_buffer( p_context, p_ff_pic );
986 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
987 * so we need to check for direct rendering again. */
989 int i_width = p_context->width;
990 int i_height = p_context->height;
991 avcodec_align_dimensions( p_context, &i_width, &i_height );
993 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
994 p_context->pix_fmt == PIX_FMT_PAL8 )
997 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
999 /* Get a new picture */
1000 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1003 bool b_compatible = true;
1004 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1005 p_pic->p[0].i_lines < i_height )
1006 b_compatible = false;
1007 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
1010 switch( p_sys->i_codec_id )
1020 i_align = i == 0 ? 16 : 8;
1023 if( p_pic->p[i].i_pitch % i_align )
1024 b_compatible = false;
1025 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1026 b_compatible = false;
1028 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
1030 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1031 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1032 b_compatible = false;
1036 decoder_DeletePicture( p_dec, p_pic );
1040 if( p_sys->i_direct_rendering_used != 1 )
1042 msg_Dbg( p_dec, "using direct rendering" );
1043 p_sys->i_direct_rendering_used = 1;
1046 p_context->draw_horiz_band = NULL;
1048 p_ff_pic->opaque = (void*)p_pic;
1049 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1050 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1051 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1052 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1053 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1055 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1056 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1057 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1058 p_ff_pic->linesize[3] = 0;
1060 #if LIBAVCODEC_VERSION_MAJOR < 54
1061 p_ff_pic->age = 256*256*256*64;
1068 if( p_sys->i_direct_rendering_used != 0 )
1070 msg_Warn( p_dec, "disabling direct rendering" );
1071 p_sys->i_direct_rendering_used = 0;
1074 return avcodec_default_get_buffer( p_context, p_ff_pic );
1076 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1078 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1080 /* We always use default reget function, it works perfectly fine */
1081 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1084 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1087 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1088 decoder_sys_t *p_sys = p_dec->p_sys;
1092 vlc_va_Release( p_sys->p_va, p_ff_pic );
1094 else if( !p_ff_pic->opaque )
1096 /* We can end up here without the AVFrame being allocated by
1097 * avcodec_default_get_buffer() if VA is used and the frame is
1098 * released when the decoder is closed
1100 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1101 avcodec_default_release_buffer( p_context, p_ff_pic );
1105 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1107 decoder_UnlinkPicture( p_dec, p_pic );
1109 for( int i = 0; i < 4; i++ )
1110 p_ff_pic->data[i] = NULL;
1113 static int ffmpeg_va_Start( void *func, va_list ap )
1115 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1116 int codec = va_arg( ap, int );
1117 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1118 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1120 return open( va, codec, fmt );
1123 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1124 const es_format_t *fmt )
1126 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1127 if( unlikely(p_va == NULL) )
1130 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1131 true, ffmpeg_va_Start, p_va,
1133 if( p_va->module == NULL )
1135 vlc_object_release( p_va );
1141 static void ffmpeg_va_Stop( void *func, va_list ap )
1143 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1144 void (*close)( vlc_va_t * ) = func;
1149 static void vlc_va_Delete( vlc_va_t *va )
1151 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1152 vlc_object_release( va );
1155 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1156 const enum PixelFormat *pi_fmt )
1158 decoder_t *p_dec = p_context->opaque;
1159 decoder_sys_t *p_sys = p_dec->p_sys;
1160 vlc_va_t *p_va = p_sys->p_va;
1163 vlc_va_Delete( p_va );
1165 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1168 /* Try too look for a supported hw acceleration */
1169 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1171 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1172 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1173 pi_fmt[i], name ? name : "unknown" );
1174 if( p_va->pix_fmt != pi_fmt[i] )
1177 /* We try to call vlc_va_Setup when possible to detect errors when
1178 * possible (later is too late) */
1179 if( p_context->width > 0 && p_context->height > 0
1180 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1181 &p_dec->fmt_out.video.i_chroma,
1182 p_context->width, p_context->height ) )
1184 msg_Err( p_dec, "acceleration setup failure" );
1188 if( p_va->description )
1189 msg_Info( p_dec, "Using %s for hardware decoding.",
1190 p_va->description );
1192 /* FIXME this will disable direct rendering
1193 * even if a new pixel format is renegotiated
1195 p_sys->b_direct_rendering = false;
1197 p_context->draw_horiz_band = NULL;
1201 msg_Err( p_dec, "acceleration not available" );
1202 vlc_va_Delete( p_va );
1206 /* Fallback to default behaviour */
1207 return avcodec_default_get_format( p_context, pi_fmt );