1 /*****************************************************************************
2 * video.c: video decoder using the libavcodec library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
34 #include <vlc_avcodec.h>
36 #include <vlc_modules.h>
39 #include <libavcodec/avcodec.h>
40 #include <libavutil/mem.h>
41 #include <libavutil/pixdesc.h>
46 /*****************************************************************************
47 * decoder_sys_t : decoder descriptor
48 *****************************************************************************/
51 AVCODEC_COMMON_MEMBERS
53 /* Video decoder specific part */
58 /* for frame skipping algo */
60 enum AVDiscard i_skip_frame;
61 enum AVDiscard i_skip_idct;
63 /* how many decoded frames are late */
65 mtime_t i_late_frames_start;
67 /* for direct rendering */
68 bool b_direct_rendering;
69 int i_direct_rendering_used;
73 /* Hack to force display of still pictures */
78 #if LIBAVCODEC_VERSION_MAJOR < 54
79 AVPaletteControl palette;
93 #ifdef HAVE_AVCODEC_MT
94 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
95 # define post_mt(s) vlc_sem_post( &s->sem_mt )
101 /*****************************************************************************
103 *****************************************************************************/
104 static void ffmpeg_InitCodec ( decoder_t * );
105 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
106 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
107 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
108 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
109 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
110 const enum PixelFormat * );
111 static void vlc_va_Delete( vlc_va_t * );
113 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
115 uint8_t *p = (uint8_t*)&fcc;
116 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
119 /*****************************************************************************
121 *****************************************************************************/
123 /* Returns a new picture buffer */
124 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
125 AVCodecContext *p_context )
127 decoder_sys_t *p_sys = p_dec->p_sys;
129 p_dec->fmt_out.video.i_width = p_context->width;
130 p_dec->fmt_out.video.i_height = p_context->height;
132 if( !p_context->width || !p_context->height )
134 return NULL; /* invalid display size */
137 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
139 /* we are doomed, but not really, because most codecs set their pix_fmt
141 * FIXME does it make sense here ? */
142 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
144 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
146 /* If an aspect-ratio was specified in the input format then force it */
147 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
149 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
150 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
154 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
155 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
157 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
159 p_dec->fmt_out.video.i_sar_num = 1;
160 p_dec->fmt_out.video.i_sar_den = 1;
164 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
165 p_dec->fmt_in.video.i_frame_rate_base > 0 )
167 p_dec->fmt_out.video.i_frame_rate =
168 p_dec->fmt_in.video.i_frame_rate;
169 p_dec->fmt_out.video.i_frame_rate_base =
170 p_dec->fmt_in.video.i_frame_rate_base;
172 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
174 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
175 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
178 return decoder_NewPicture( p_dec );
181 /*****************************************************************************
182 * InitVideo: initialize the video decoder
183 *****************************************************************************
184 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
185 * opened (done after the first decoded frame).
186 *****************************************************************************/
187 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
188 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
190 decoder_sys_t *p_sys;
193 /* Allocate the memory needed to store the decoder's structure */
194 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
197 p_codec->type = AVMEDIA_TYPE_VIDEO;
198 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
199 p_context->codec_id = i_codec_id;
200 p_sys->p_context = p_context;
201 p_sys->p_codec = p_codec;
202 p_sys->i_codec_id = i_codec_id;
203 p_sys->psz_namecodec = psz_namecodec;
204 p_sys->p_ff_pic = avcodec_alloc_frame();
205 p_sys->b_delayed_open = true;
207 vlc_sem_init( &p_sys->sem_mt, 0 );
209 /* ***** Fill p_context with init values ***** */
210 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
212 /* ***** Get configuration of ffmpeg plugin ***** */
213 p_sys->p_context->workaround_bugs =
214 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
215 p_sys->p_context->err_recognition =
216 var_InheritInteger( p_dec, "avcodec-error-resilience" );
218 if( var_CreateGetBool( p_dec, "grayscale" ) )
219 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
221 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
222 if( i_val ) p_sys->p_context->debug_mv = i_val;
224 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
225 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
226 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
227 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
228 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
230 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
231 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
233 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 54, 41, 0 )
234 if( var_InheritBool( p_dec, "avcodec-ignorecrop" ) )
235 p_sys->p_context->flags2 |= CODEC_FLAG2_IGNORE_CROP;
238 /* ***** libavcodec frame skipping ***** */
239 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
241 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
244 p_sys->p_context->skip_frame = AVDISCARD_NONE;
247 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
250 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
253 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
256 p_sys->p_context->skip_frame = AVDISCARD_ALL;
259 p_sys->p_context->skip_frame = AVDISCARD_NONE;
262 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
264 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
267 p_sys->p_context->skip_idct = AVDISCARD_NONE;
270 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
273 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
276 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
279 p_sys->p_context->skip_idct = AVDISCARD_ALL;
282 p_sys->p_context->skip_idct = AVDISCARD_NONE;
285 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
287 /* ***** libavcodec direct rendering ***** */
288 p_sys->b_direct_rendering = false;
289 p_sys->i_direct_rendering_used = -1;
290 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
291 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
292 /* No idea why ... but this fixes flickering on some TSCC streams */
293 p_sys->i_codec_id != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
294 p_sys->i_codec_id != AV_CODEC_ID_CINEPAK &&
295 !p_sys->p_context->debug_mv )
297 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
298 * so we need to do another check in ffmpeg_GetFrameBuf() */
299 p_sys->b_direct_rendering = true;
302 /* libavcodec doesn't properly release old pictures when frames are skipped */
303 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
304 if( p_sys->b_direct_rendering )
306 msg_Dbg( p_dec, "trying to use direct rendering" );
307 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
311 msg_Dbg( p_dec, "direct rendering is disabled" );
314 /* Always use our get_buffer wrapper so we can calculate the
316 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
317 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
318 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
319 p_sys->p_context->opaque = p_dec;
321 #ifdef HAVE_AVCODEC_MT
322 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
323 if( i_thread_count <= 0 )
325 i_thread_count = vlc_GetCPUCount();
326 if( i_thread_count > 1 )
329 //FIXME: take in count the decoding time
330 i_thread_count = __MIN( i_thread_count, 4 );
332 i_thread_count = __MIN( i_thread_count, 16 );
333 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
334 p_sys->p_context->thread_count = i_thread_count;
337 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
338 if( (hw == NULL || strcasecmp( hw, "none" )) &&
339 (i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ||
340 i_codec_id == AV_CODEC_ID_MPEG4 ||
341 i_codec_id == AV_CODEC_ID_H264 ||
342 i_codec_id == AV_CODEC_ID_VC1 || i_codec_id == AV_CODEC_ID_WMV3) )
344 #ifdef HAVE_AVCODEC_MT
345 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
347 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
348 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
350 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
351 ( i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ) )
353 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
354 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
357 p_sys->p_context->get_format = ffmpeg_GetFormat;
360 #ifdef HAVE_AVCODEC_MT
361 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
362 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;
469 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
470 avcodec_flush_buffers( p_context );
472 block_Release( p_block );
476 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
478 /* Do not care about late frames when prerolling
479 * TODO avoid decoding of non reference frame
480 * (ie all B except for H264 where it depends only on nal_ref_idc) */
481 p_sys->i_late_frames = 0;
484 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
485 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
487 if( p_sys->i_pts > VLC_TS_INVALID )
489 msg_Err( p_dec, "more than 5 seconds of late video -> "
490 "dropping frame (computer too slow ?)" );
491 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
493 block_Release( p_block );
494 p_sys->i_late_frames--;
498 /* A good idea could be to decode all I pictures and see for the other */
499 if( !p_dec->b_pace_control &&
501 (p_sys->i_late_frames > 4) )
504 if( p_sys->i_late_frames < 12 )
506 p_context->skip_frame =
507 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
508 AVDISCARD_NONREF : p_sys->i_skip_frame;
512 /* picture too late, won't decode
513 * but break picture until a new I, and for mpeg4 ...*/
514 p_sys->i_late_frames--; /* needed else it will never be decrease */
515 block_Release( p_block );
521 if( p_sys->b_hurry_up )
522 p_context->skip_frame = p_sys->i_skip_frame;
523 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
529 if( p_context->width <= 0 || p_context->height <= 0 )
531 if( p_sys->b_hurry_up )
532 p_context->skip_frame = p_sys->i_skip_frame;
535 else if( !b_drawpicture )
537 /* It creates broken picture
538 * FIXME either our parser or ffmpeg is broken */
540 if( p_sys->b_hurry_up )
541 p_context->skip_frame = __MAX( p_context->skip_frame,
547 * Do the actual decoding now */
549 /* Don't forget that libavcodec requires a little more bytes
550 * that the real frame size */
551 if( p_block->i_buffer > 0 )
553 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
555 p_block = block_Realloc( p_block, 0,
556 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
559 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
561 memset( p_block->p_buffer + p_block->i_buffer, 0,
562 FF_INPUT_BUFFER_PADDING_SIZE );
565 while( p_block->i_buffer > 0 || p_sys->b_flush )
567 int i_used, b_gotpicture;
571 /* Set the PTS/DTS in the context reordered_opaque field */
572 if( p_block->i_pts > VLC_TS_INVALID )
573 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
574 else if( p_block->i_dts > VLC_TS_INVALID )
575 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
577 p_context->reordered_opaque = INT64_MIN;
578 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
580 /* Make sure we don't reuse the same timestamps twice */
582 p_block->i_dts = VLC_TS_INVALID;
586 av_init_packet( &pkt );
587 pkt.data = p_block->p_buffer;
588 pkt.size = p_block->i_buffer;
589 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
590 &b_gotpicture, &pkt );
592 if( b_null_size && !p_sys->b_flush &&
593 p_context->width > 0 && p_context->height > 0 )
595 /* Reparse it to not drop the I frame */
597 if( p_sys->b_hurry_up )
598 p_context->skip_frame = p_sys->i_skip_frame;
599 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
600 &b_gotpicture, &pkt );
605 p_sys->b_first_frame = true;
607 if( p_block->i_buffer <= 0 )
608 p_sys->b_flush = false;
613 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
615 block_Release( p_block );
618 else if( i_used > p_block->i_buffer ||
619 p_context->thread_count > 1 )
621 i_used = p_block->i_buffer;
625 p_block->i_buffer -= i_used;
626 p_block->p_buffer += i_used;
628 /* Nothing to display */
631 if( i_used == 0 ) break;
635 /* Sanity check (seems to be needed for some streams) */
636 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
638 p_sys->b_has_b_frames = true;
641 /* Compute the PTS */
642 mtime_t i_pts = VLC_TS_INVALID;
643 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
645 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
646 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
649 if( !p_context->has_b_frames ||
650 !p_sys->b_has_b_frames ||
651 !p_sys->p_ff_pic->reference ||
652 p_sys->i_pts <= VLC_TS_INVALID )
655 /* Guess what ? The rules are different for Real Video :( */
656 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
657 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
658 p_sys->b_has_b_frames )
660 i_pts = VLC_TS_INVALID;
661 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
669 if( i_pts <= VLC_TS_INVALID )
670 i_pts = p_sys->i_pts;
672 /* Interpolate the next PTS */
673 if( i_pts > VLC_TS_INVALID )
674 p_sys->i_pts = i_pts;
675 if( p_sys->i_pts > VLC_TS_INVALID )
677 /* interpolate the next PTS */
678 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
679 p_dec->fmt_in.video.i_frame_rate_base > 0 )
681 p_sys->i_pts += INT64_C(1000000) *
682 (2 + p_sys->p_ff_pic->repeat_pict) *
683 p_dec->fmt_in.video.i_frame_rate_base /
684 (2 * p_dec->fmt_in.video.i_frame_rate);
686 else if( p_context->time_base.den > 0 )
688 int i_tick = p_context->ticks_per_frame;
692 p_sys->i_pts += INT64_C(1000000) *
693 (2 + p_sys->p_ff_pic->repeat_pict) *
694 i_tick * p_context->time_base.num /
695 (2 * p_context->time_base.den);
699 /* Update frame late count (except when doing preroll) */
700 mtime_t i_display_date = 0;
701 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
702 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
704 if( i_display_date > 0 && i_display_date <= mdate() )
706 p_sys->i_late_frames++;
707 if( p_sys->i_late_frames == 1 )
708 p_sys->i_late_frames_start = mdate();
712 p_sys->i_late_frames = 0;
715 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
718 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
720 /* Get a new picture */
721 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
724 block_Release( p_block );
728 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
730 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
734 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
735 decoder_LinkPicture( p_dec, p_pic );
738 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
740 /* Fetch again the aspect ratio in case it changed */
741 p_dec->fmt_out.video.i_sar_num
742 = p_context->sample_aspect_ratio.num;
743 p_dec->fmt_out.video.i_sar_den
744 = p_context->sample_aspect_ratio.den;
746 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
748 p_dec->fmt_out.video.i_sar_num = 1;
749 p_dec->fmt_out.video.i_sar_den = 1;
753 /* Send decoded frame to vout */
754 if( i_pts > VLC_TS_INVALID)
758 if( p_sys->b_first_frame )
760 /* Hack to force display of still pictures */
761 p_sys->b_first_frame = false;
762 p_pic->b_force = true;
765 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
766 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
767 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
773 decoder_DeletePicture( p_dec, p_pic );
777 block_Release( p_block );
781 /*****************************************************************************
782 * EndVideo: decoder destruction
783 *****************************************************************************
784 * This function is called when the thread ends after a successful
786 *****************************************************************************/
787 void EndVideoDec( decoder_t *p_dec )
789 decoder_sys_t *p_sys = p_dec->p_sys;
793 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
794 if( p_sys->p_context->codec )
795 avcodec_flush_buffers( p_sys->p_context );
799 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
803 vlc_va_Delete( p_sys->p_va );
806 vlc_sem_destroy( &p_sys->sem_mt );
809 /*****************************************************************************
810 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
811 *****************************************************************************/
812 static void ffmpeg_InitCodec( decoder_t *p_dec )
814 decoder_sys_t *p_sys = p_dec->p_sys;
815 int i_size = p_dec->fmt_in.i_extra;
817 if( !i_size ) return;
819 if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
823 p_sys->p_context->extradata_size = i_size + 12;
824 p = p_sys->p_context->extradata =
825 malloc( p_sys->p_context->extradata_size );
829 memcpy( &p[0], "SVQ3", 4 );
830 memset( &p[4], 0, 8 );
831 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
833 /* Now remove all atoms before the SMI one */
834 if( p_sys->p_context->extradata_size > 0x5a &&
835 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
837 uint8_t *psz = &p[0x52];
839 while( psz < &p[p_sys->p_context->extradata_size - 8] )
841 int i_size = GetDWBE( psz );
844 /* FIXME handle 1 as long size */
847 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
849 memmove( &p[0x52], psz,
850 &p[p_sys->p_context->extradata_size] - psz );
860 p_sys->p_context->extradata_size = i_size;
861 p_sys->p_context->extradata =
862 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
863 if( p_sys->p_context->extradata )
865 memcpy( p_sys->p_context->extradata,
866 p_dec->fmt_in.p_extra, i_size );
867 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
868 0, FF_INPUT_BUFFER_PADDING_SIZE );
873 /*****************************************************************************
874 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
875 * picture_t structure (when not in direct rendering mode).
876 *****************************************************************************/
877 static void ffmpeg_CopyPicture( decoder_t *p_dec,
878 picture_t *p_pic, AVFrame *p_ff_pic )
880 decoder_sys_t *p_sys = p_dec->p_sys;
884 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
886 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
888 int i_plane, i_size, i_line;
889 uint8_t *p_dst, *p_src;
890 int i_src_stride, i_dst_stride;
892 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
894 p_src = p_ff_pic->data[i_plane];
895 p_dst = p_pic->p[i_plane].p_pixels;
896 i_src_stride = p_ff_pic->linesize[i_plane];
897 i_dst_stride = p_pic->p[i_plane].i_pitch;
899 i_size = __MIN( i_src_stride, i_dst_stride );
900 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
903 memcpy( p_dst, p_src, i_size );
904 p_src += i_src_stride;
905 p_dst += i_dst_stride;
911 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
912 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
913 p_sys->p_context->pix_fmt, name ? name : "unknown" );
918 /*****************************************************************************
919 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
920 *****************************************************************************
921 * It is used for direct rendering as well as to get the right PTS for each
922 * decoded picture (even in indirect rendering mode).
923 *****************************************************************************/
924 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
927 decoder_t *p_dec = (decoder_t *)p_context->opaque;
928 decoder_sys_t *p_sys = p_dec->p_sys;
932 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
933 p_ff_pic->opaque = NULL;
937 /* hwaccel_context is not present in old ffmpeg version */
938 if( vlc_va_Setup( p_sys->p_va,
939 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
940 p_context->width, p_context->height ) )
942 msg_Err( p_dec, "vlc_va_Setup failed" );
947 p_ff_pic->type = FF_BUFFER_TYPE_USER;
949 #if LIBAVCODEC_VERSION_MAJOR < 54
950 p_ff_pic->age = 256*256*256*64;
953 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
955 msg_Err( p_dec, "VaGrabSurface failed" );
960 else if( !p_sys->b_direct_rendering )
962 /* Not much to do in indirect rendering mode. */
963 return avcodec_default_get_buffer( p_context, p_ff_pic );
967 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
968 * so we need to check for direct rendering again. */
970 int i_width = p_context->width;
971 int i_height = p_context->height;
972 avcodec_align_dimensions( p_context, &i_width, &i_height );
974 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
975 p_context->pix_fmt == PIX_FMT_PAL8 )
978 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
980 /* Get a new picture */
981 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
984 bool b_compatible = true;
985 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
986 p_pic->p[0].i_lines < i_height )
987 b_compatible = false;
988 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
991 switch( p_sys->i_codec_id )
993 case AV_CODEC_ID_SVQ1:
994 case AV_CODEC_ID_VP5:
995 case AV_CODEC_ID_VP6:
996 case AV_CODEC_ID_VP6F:
997 case AV_CODEC_ID_VP6A:
1001 i_align = i == 0 ? 16 : 8;
1004 if( p_pic->p[i].i_pitch % i_align )
1005 b_compatible = false;
1006 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1007 b_compatible = false;
1009 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
1011 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1012 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1013 b_compatible = false;
1017 decoder_DeletePicture( p_dec, p_pic );
1021 if( p_sys->i_direct_rendering_used != 1 )
1023 msg_Dbg( p_dec, "using direct rendering" );
1024 p_sys->i_direct_rendering_used = 1;
1027 p_context->draw_horiz_band = NULL;
1029 p_ff_pic->opaque = (void*)p_pic;
1030 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1031 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1032 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1033 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1034 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1036 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1037 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1038 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1039 p_ff_pic->linesize[3] = 0;
1041 #if LIBAVCODEC_VERSION_MAJOR < 54
1042 p_ff_pic->age = 256*256*256*64;
1049 if( p_sys->i_direct_rendering_used != 0 )
1051 msg_Warn( p_dec, "disabling direct rendering" );
1052 p_sys->i_direct_rendering_used = 0;
1055 return avcodec_default_get_buffer( p_context, p_ff_pic );
1057 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1059 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1061 /* We always use default reget function, it works perfectly fine */
1062 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1065 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1068 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1069 decoder_sys_t *p_sys = p_dec->p_sys;
1073 vlc_va_Release( p_sys->p_va, p_ff_pic );
1075 else if( !p_ff_pic->opaque )
1077 /* We can end up here without the AVFrame being allocated by
1078 * avcodec_default_get_buffer() if VA is used and the frame is
1079 * released when the decoder is closed
1081 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1082 avcodec_default_release_buffer( p_context, p_ff_pic );
1086 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1088 decoder_UnlinkPicture( p_dec, p_pic );
1090 for( int i = 0; i < 4; i++ )
1091 p_ff_pic->data[i] = NULL;
1094 static int ffmpeg_va_Start( void *func, va_list ap )
1096 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1097 int codec = va_arg( ap, int );
1098 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1099 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1101 return open( va, codec, fmt );
1104 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1105 const es_format_t *fmt )
1107 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1108 if( unlikely(p_va == NULL) )
1111 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1112 true, ffmpeg_va_Start, p_va,
1114 if( p_va->module == NULL )
1116 vlc_object_release( p_va );
1122 static void ffmpeg_va_Stop( void *func, va_list ap )
1124 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1125 void (*close)( vlc_va_t * ) = func;
1130 static void vlc_va_Delete( vlc_va_t *va )
1132 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1133 vlc_object_release( va );
1136 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1137 const enum PixelFormat *pi_fmt )
1139 decoder_t *p_dec = p_context->opaque;
1140 decoder_sys_t *p_sys = p_dec->p_sys;
1141 vlc_va_t *p_va = p_sys->p_va;
1144 vlc_va_Delete( p_va );
1146 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1149 /* Try too look for a supported hw acceleration */
1150 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1152 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1153 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1154 pi_fmt[i], name ? name : "unknown" );
1155 if( p_va->pix_fmt != pi_fmt[i] )
1158 /* We try to call vlc_va_Setup when possible to detect errors when
1159 * possible (later is too late) */
1160 if( p_context->width > 0 && p_context->height > 0
1161 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1162 &p_dec->fmt_out.video.i_chroma,
1163 p_context->width, p_context->height ) )
1165 msg_Err( p_dec, "acceleration setup failure" );
1169 if( p_va->description )
1170 msg_Info( p_dec, "Using %s for hardware decoding.",
1171 p_va->description );
1173 /* FIXME this will disable direct rendering
1174 * even if a new pixel format is renegotiated
1176 p_sys->b_direct_rendering = false;
1178 p_context->draw_horiz_band = NULL;
1182 msg_Err( p_dec, "acceleration not available" );
1183 vlc_va_Delete( p_va );
1187 /* Fallback to default behaviour */
1188 return avcodec_default_get_format( p_context, pi_fmt );