1 /*****************************************************************************
2 * video.c: video decoder using the libavcodec library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VLC authors and VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
34 #include <vlc_avcodec.h>
36 #include <vlc_modules.h>
39 #include <libavcodec/avcodec.h>
40 #include <libavutil/mem.h>
41 #include <libavutil/pixdesc.h>
46 /*****************************************************************************
47 * decoder_sys_t : decoder descriptor
48 *****************************************************************************/
51 AVCODEC_COMMON_MEMBERS
53 /* Video decoder specific part */
58 /* for frame skipping algo */
60 enum AVDiscard i_skip_frame;
61 enum AVDiscard i_skip_idct;
63 /* how many decoded frames are late */
65 mtime_t i_late_frames_start;
67 /* for direct rendering */
68 bool b_direct_rendering;
69 int i_direct_rendering_used;
73 /* Hack to force display of still pictures */
78 #if LIBAVCODEC_VERSION_MAJOR < 54
79 AVPaletteControl palette;
93 #ifdef HAVE_AVCODEC_MT
94 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
95 # define post_mt(s) vlc_sem_post( &s->sem_mt )
101 /*****************************************************************************
103 *****************************************************************************/
104 static void ffmpeg_InitCodec ( decoder_t * );
105 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
106 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
107 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
108 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
109 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
110 const enum PixelFormat * );
111 static void vlc_va_Delete( vlc_va_t * );
113 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
115 uint8_t *p = (uint8_t*)&fcc;
116 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
119 /*****************************************************************************
121 *****************************************************************************/
123 /* Returns a new picture buffer */
124 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
125 AVCodecContext *p_context )
127 decoder_sys_t *p_sys = p_dec->p_sys;
129 p_dec->fmt_out.video.i_width = p_context->width;
130 p_dec->fmt_out.video.i_height = p_context->height;
132 if( !p_context->width || !p_context->height )
134 return NULL; /* invalid display size */
137 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
139 /* we are doomed, but not really, because most codecs set their pix_fmt
141 * FIXME does it make sense here ? */
142 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
144 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
146 /* If an aspect-ratio was specified in the input format then force it */
147 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
149 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
150 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
154 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
155 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
157 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
159 p_dec->fmt_out.video.i_sar_num = 1;
160 p_dec->fmt_out.video.i_sar_den = 1;
164 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
165 p_dec->fmt_in.video.i_frame_rate_base > 0 )
167 p_dec->fmt_out.video.i_frame_rate =
168 p_dec->fmt_in.video.i_frame_rate;
169 p_dec->fmt_out.video.i_frame_rate_base =
170 p_dec->fmt_in.video.i_frame_rate_base;
172 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
174 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
175 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
178 return decoder_NewPicture( p_dec );
181 /*****************************************************************************
182 * InitVideo: initialize the video decoder
183 *****************************************************************************
184 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
185 * opened (done after the first decoded frame).
186 *****************************************************************************/
187 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
188 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
190 decoder_sys_t *p_sys;
193 /* Allocate the memory needed to store the decoder's structure */
194 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
197 p_codec->type = AVMEDIA_TYPE_VIDEO;
198 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
199 p_context->codec_id = i_codec_id;
200 p_sys->p_context = p_context;
201 p_sys->p_codec = p_codec;
202 p_sys->i_codec_id = i_codec_id;
203 p_sys->psz_namecodec = psz_namecodec;
204 p_sys->p_ff_pic = avcodec_alloc_frame();
205 p_sys->b_delayed_open = true;
207 vlc_sem_init( &p_sys->sem_mt, 0 );
209 /* ***** Fill p_context with init values ***** */
210 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
212 /* ***** Get configuration of ffmpeg plugin ***** */
213 p_sys->p_context->workaround_bugs =
214 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
215 #if LIBAVCODEC_VERSION_MAJOR < 54
216 p_sys->p_context->error_recognition =
218 p_sys->p_context->err_recognition =
220 var_InheritInteger( p_dec, "avcodec-error-resilience" );
222 if( var_CreateGetBool( p_dec, "grayscale" ) )
223 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
225 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
226 if( i_val ) p_sys->p_context->debug_mv = i_val;
228 i_val = var_CreateGetInteger( p_dec, "avcodec-lowres" );
229 if( i_val > 0 && i_val <= 2 ) p_sys->p_context->lowres = i_val;
231 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
232 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
233 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
234 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
235 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
237 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
238 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
240 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 54, 41, 0 )
241 if( var_InheritBool( p_dec, "avcodec-ignorecrop" ) )
242 p_sys->p_context->flags2 |= CODEC_FLAG2_IGNORE_CROP;
245 /* ***** libavcodec frame skipping ***** */
246 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
248 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
251 p_sys->p_context->skip_frame = AVDISCARD_NONE;
254 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
257 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
260 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
263 p_sys->p_context->skip_frame = AVDISCARD_ALL;
266 p_sys->p_context->skip_frame = AVDISCARD_NONE;
269 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
271 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
274 p_sys->p_context->skip_idct = AVDISCARD_NONE;
277 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
280 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
283 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
286 p_sys->p_context->skip_idct = AVDISCARD_ALL;
289 p_sys->p_context->skip_idct = AVDISCARD_NONE;
292 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
294 /* ***** libavcodec direct rendering ***** */
295 p_sys->b_direct_rendering = false;
296 p_sys->i_direct_rendering_used = -1;
297 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
298 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
299 /* No idea why ... but this fixes flickering on some TSCC streams */
300 p_sys->i_codec_id != CODEC_ID_TSCC && p_sys->i_codec_id != CODEC_ID_CSCD &&
301 p_sys->i_codec_id != CODEC_ID_CINEPAK &&
302 !p_sys->p_context->debug_mv )
304 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
305 * so we need to do another check in ffmpeg_GetFrameBuf() */
306 p_sys->b_direct_rendering = true;
309 /* libavcodec doesn't properly release old pictures when frames are skipped */
310 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
311 if( p_sys->b_direct_rendering )
313 msg_Dbg( p_dec, "trying to use direct rendering" );
314 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
318 msg_Dbg( p_dec, "direct rendering is disabled" );
321 /* Always use our get_buffer wrapper so we can calculate the
323 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
324 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
325 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
326 p_sys->p_context->opaque = p_dec;
328 #ifdef HAVE_AVCODEC_MT
329 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
330 if( i_thread_count <= 0 )
332 i_thread_count = vlc_GetCPUCount();
333 if( i_thread_count > 1 )
336 //FIXME: take in count the decoding time
337 i_thread_count = __MIN( i_thread_count, 4 );
339 i_thread_count = __MIN( i_thread_count, 16 );
340 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
341 p_sys->p_context->thread_count = i_thread_count;
344 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
345 if( (hw == NULL || strcasecmp( hw, "none" )) &&
346 (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
347 i_codec_id == CODEC_ID_MPEG4 ||
348 i_codec_id == CODEC_ID_H264 ||
349 i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
351 #ifdef HAVE_AVCODEC_MT
352 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
354 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
355 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
357 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
358 ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) )
360 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
361 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
364 p_sys->p_context->get_format = ffmpeg_GetFormat;
367 #ifdef HAVE_AVCODEC_MT
368 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
369 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
373 /* ***** misc init ***** */
374 p_sys->i_pts = VLC_TS_INVALID;
375 p_sys->b_has_b_frames = false;
376 p_sys->b_first_frame = true;
377 p_sys->b_flush = false;
378 p_sys->i_late_frames = 0;
380 /* Set output properties */
381 p_dec->fmt_out.i_cat = VIDEO_ES;
382 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
384 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
385 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
387 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
389 #if LIBAVCODEC_VERSION_MAJOR < 54
391 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
392 if( p_dec->fmt_in.video.p_palette )
394 p_sys->palette.palette_changed = 1;
396 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
402 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
403 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
404 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
405 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
407 p_sys->palette.palette[i] = c.u;
409 p_sys->p_context->palctrl = &p_sys->palette;
411 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
412 if( p_dec->fmt_out.video.p_palette )
413 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
415 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
417 p_sys->p_context->palctrl = &p_sys->palette;
423 /* ***** init this codec with special data ***** */
424 ffmpeg_InitCodec( p_dec );
426 /* ***** Open the codec ***** */
427 if( ffmpeg_OpenCodec( p_dec ) < 0 )
429 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
430 av_free( p_sys->p_ff_pic );
431 vlc_sem_destroy( &p_sys->sem_mt );
439 /*****************************************************************************
440 * DecodeVideo: Called to decode one or more frames
441 *****************************************************************************/
442 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
444 decoder_sys_t *p_sys = p_dec->p_sys;
445 AVCodecContext *p_context = p_sys->p_context;
447 int b_null_size = false;
450 if( !pp_block || !*pp_block )
453 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
455 ffmpeg_InitCodec( p_dec );
456 if( p_sys->b_delayed_open )
458 if( ffmpeg_OpenCodec( p_dec ) )
459 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
464 if( p_sys->b_delayed_open )
466 block_Release( p_block );
470 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
472 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
474 p_sys->i_late_frames = 0;
476 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
477 avcodec_flush_buffers( p_context );
479 block_Release( p_block );
483 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
485 /* Do not care about late frames when prerolling
486 * TODO avoid decoding of non reference frame
487 * (ie all B except for H264 where it depends only on nal_ref_idc) */
488 p_sys->i_late_frames = 0;
491 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
492 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
494 if( p_sys->i_pts > VLC_TS_INVALID )
496 msg_Err( p_dec, "more than 5 seconds of late video -> "
497 "dropping frame (computer too slow ?)" );
498 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
500 block_Release( p_block );
501 p_sys->i_late_frames--;
505 /* A good idea could be to decode all I pictures and see for the other */
506 if( !p_dec->b_pace_control &&
508 (p_sys->i_late_frames > 4) )
511 if( p_sys->i_late_frames < 12 )
513 p_context->skip_frame =
514 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
515 AVDISCARD_NONREF : p_sys->i_skip_frame;
519 /* picture too late, won't decode
520 * but break picture until a new I, and for mpeg4 ...*/
521 p_sys->i_late_frames--; /* needed else it will never be decrease */
522 block_Release( p_block );
528 if( p_sys->b_hurry_up )
529 p_context->skip_frame = p_sys->i_skip_frame;
530 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
536 if( p_context->width <= 0 || p_context->height <= 0 )
538 if( p_sys->b_hurry_up )
539 p_context->skip_frame = p_sys->i_skip_frame;
542 else if( !b_drawpicture )
544 /* It creates broken picture
545 * FIXME either our parser or ffmpeg is broken */
547 if( p_sys->b_hurry_up )
548 p_context->skip_frame = __MAX( p_context->skip_frame,
554 * Do the actual decoding now */
556 /* Don't forget that libavcodec requires a little more bytes
557 * that the real frame size */
558 if( p_block->i_buffer > 0 )
560 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
562 p_block = block_Realloc( p_block, 0,
563 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
566 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
568 memset( p_block->p_buffer + p_block->i_buffer, 0,
569 FF_INPUT_BUFFER_PADDING_SIZE );
572 while( p_block->i_buffer > 0 || p_sys->b_flush )
574 int i_used, b_gotpicture;
578 /* Set the PTS/DTS in the context reordered_opaque field */
579 if( p_block->i_pts > VLC_TS_INVALID )
580 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
581 else if( p_block->i_dts > VLC_TS_INVALID )
582 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
584 p_context->reordered_opaque = INT64_MIN;
585 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
587 /* Make sure we don't reuse the same timestamps twice */
589 p_block->i_dts = VLC_TS_INVALID;
593 av_init_packet( &pkt );
594 pkt.data = p_block->p_buffer;
595 pkt.size = p_block->i_buffer;
596 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
597 &b_gotpicture, &pkt );
599 if( b_null_size && !p_sys->b_flush &&
600 p_context->width > 0 && p_context->height > 0 )
602 /* Reparse it to not drop the I frame */
604 if( p_sys->b_hurry_up )
605 p_context->skip_frame = p_sys->i_skip_frame;
606 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
607 &b_gotpicture, &pkt );
612 p_sys->b_first_frame = true;
614 if( p_block->i_buffer <= 0 )
615 p_sys->b_flush = false;
620 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
622 block_Release( p_block );
625 else if( i_used > p_block->i_buffer ||
626 p_context->thread_count > 1 )
628 i_used = p_block->i_buffer;
632 p_block->i_buffer -= i_used;
633 p_block->p_buffer += i_used;
635 /* Nothing to display */
638 if( i_used == 0 ) break;
642 /* Sanity check (seems to be needed for some streams) */
643 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
645 p_sys->b_has_b_frames = true;
648 /* Compute the PTS */
649 mtime_t i_pts = VLC_TS_INVALID;
650 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
652 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
653 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
656 if( !p_context->has_b_frames ||
657 !p_sys->b_has_b_frames ||
658 !p_sys->p_ff_pic->reference ||
659 p_sys->i_pts <= VLC_TS_INVALID )
662 /* Guess what ? The rules are different for Real Video :( */
663 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
664 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
665 p_sys->b_has_b_frames )
667 i_pts = VLC_TS_INVALID;
668 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
676 if( i_pts <= VLC_TS_INVALID )
677 i_pts = p_sys->i_pts;
679 /* Interpolate the next PTS */
680 if( i_pts > VLC_TS_INVALID )
681 p_sys->i_pts = i_pts;
682 if( p_sys->i_pts > VLC_TS_INVALID )
684 /* interpolate the next PTS */
685 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
686 p_dec->fmt_in.video.i_frame_rate_base > 0 )
688 p_sys->i_pts += INT64_C(1000000) *
689 (2 + p_sys->p_ff_pic->repeat_pict) *
690 p_dec->fmt_in.video.i_frame_rate_base /
691 (2 * p_dec->fmt_in.video.i_frame_rate);
693 else if( p_context->time_base.den > 0 )
695 int i_tick = p_context->ticks_per_frame;
699 p_sys->i_pts += INT64_C(1000000) *
700 (2 + p_sys->p_ff_pic->repeat_pict) *
701 i_tick * p_context->time_base.num /
702 (2 * p_context->time_base.den);
706 /* Update frame late count (except when doing preroll) */
707 mtime_t i_display_date = 0;
708 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
709 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
711 if( i_display_date > 0 && i_display_date <= mdate() )
713 p_sys->i_late_frames++;
714 if( p_sys->i_late_frames == 1 )
715 p_sys->i_late_frames_start = mdate();
719 p_sys->i_late_frames = 0;
722 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
725 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
727 /* Get a new picture */
728 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
731 block_Release( p_block );
735 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
737 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
741 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
742 decoder_LinkPicture( p_dec, p_pic );
745 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
747 /* Fetch again the aspect ratio in case it changed */
748 p_dec->fmt_out.video.i_sar_num
749 = p_context->sample_aspect_ratio.num;
750 p_dec->fmt_out.video.i_sar_den
751 = p_context->sample_aspect_ratio.den;
753 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
755 p_dec->fmt_out.video.i_sar_num = 1;
756 p_dec->fmt_out.video.i_sar_den = 1;
760 /* Send decoded frame to vout */
761 if( i_pts > VLC_TS_INVALID)
765 if( p_sys->b_first_frame )
767 /* Hack to force display of still pictures */
768 p_sys->b_first_frame = false;
769 p_pic->b_force = true;
772 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
773 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
774 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
776 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
777 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
778 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
779 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
780 p_pic->i_qstride * i_mb_h );
781 switch( p_sys->p_ff_pic->qscale_type )
783 case FF_QSCALE_TYPE_MPEG1:
784 p_pic->i_qtype = QTYPE_MPEG1;
786 case FF_QSCALE_TYPE_MPEG2:
787 p_pic->i_qtype = QTYPE_MPEG2;
789 case FF_QSCALE_TYPE_H264:
790 p_pic->i_qtype = QTYPE_H264;
798 decoder_DeletePicture( p_dec, p_pic );
802 block_Release( p_block );
806 /*****************************************************************************
807 * EndVideo: decoder destruction
808 *****************************************************************************
809 * This function is called when the thread ends after a successful
811 *****************************************************************************/
812 void EndVideoDec( decoder_t *p_dec )
814 decoder_sys_t *p_sys = p_dec->p_sys;
818 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
819 if( p_sys->p_context->codec )
820 avcodec_flush_buffers( p_sys->p_context );
824 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
828 vlc_va_Delete( p_sys->p_va );
831 vlc_sem_destroy( &p_sys->sem_mt );
834 /*****************************************************************************
835 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
836 *****************************************************************************/
837 static void ffmpeg_InitCodec( decoder_t *p_dec )
839 decoder_sys_t *p_sys = p_dec->p_sys;
840 int i_size = p_dec->fmt_in.i_extra;
842 if( !i_size ) return;
844 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
848 p_sys->p_context->extradata_size = i_size + 12;
849 p = p_sys->p_context->extradata =
850 malloc( p_sys->p_context->extradata_size );
854 memcpy( &p[0], "SVQ3", 4 );
855 memset( &p[4], 0, 8 );
856 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
858 /* Now remove all atoms before the SMI one */
859 if( p_sys->p_context->extradata_size > 0x5a &&
860 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
862 uint8_t *psz = &p[0x52];
864 while( psz < &p[p_sys->p_context->extradata_size - 8] )
866 int i_size = GetDWBE( psz );
869 /* FIXME handle 1 as long size */
872 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
874 memmove( &p[0x52], psz,
875 &p[p_sys->p_context->extradata_size] - psz );
885 p_sys->p_context->extradata_size = i_size;
886 p_sys->p_context->extradata =
887 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
888 if( p_sys->p_context->extradata )
890 memcpy( p_sys->p_context->extradata,
891 p_dec->fmt_in.p_extra, i_size );
892 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
893 0, FF_INPUT_BUFFER_PADDING_SIZE );
898 /*****************************************************************************
899 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
900 * picture_t structure (when not in direct rendering mode).
901 *****************************************************************************/
902 static void ffmpeg_CopyPicture( decoder_t *p_dec,
903 picture_t *p_pic, AVFrame *p_ff_pic )
905 decoder_sys_t *p_sys = p_dec->p_sys;
909 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
911 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
913 int i_plane, i_size, i_line;
914 uint8_t *p_dst, *p_src;
915 int i_src_stride, i_dst_stride;
917 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
919 p_src = p_ff_pic->data[i_plane];
920 p_dst = p_pic->p[i_plane].p_pixels;
921 i_src_stride = p_ff_pic->linesize[i_plane];
922 i_dst_stride = p_pic->p[i_plane].i_pitch;
924 i_size = __MIN( i_src_stride, i_dst_stride );
925 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
928 memcpy( p_dst, p_src, i_size );
929 p_src += i_src_stride;
930 p_dst += i_dst_stride;
936 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
937 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
938 p_sys->p_context->pix_fmt, name ? name : "unknown" );
943 /*****************************************************************************
944 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
945 *****************************************************************************
946 * It is used for direct rendering as well as to get the right PTS for each
947 * decoded picture (even in indirect rendering mode).
948 *****************************************************************************/
949 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
952 decoder_t *p_dec = (decoder_t *)p_context->opaque;
953 decoder_sys_t *p_sys = p_dec->p_sys;
957 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
958 p_ff_pic->opaque = NULL;
962 /* hwaccel_context is not present in old ffmpeg version */
963 if( vlc_va_Setup( p_sys->p_va,
964 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
965 p_context->width, p_context->height ) )
967 msg_Err( p_dec, "vlc_va_Setup failed" );
972 p_ff_pic->type = FF_BUFFER_TYPE_USER;
974 #if LIBAVCODEC_VERSION_MAJOR < 54
975 p_ff_pic->age = 256*256*256*64;
978 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
980 msg_Err( p_dec, "VaGrabSurface failed" );
985 else if( !p_sys->b_direct_rendering )
987 /* Not much to do in indirect rendering mode. */
988 return avcodec_default_get_buffer( p_context, p_ff_pic );
992 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
993 * so we need to check for direct rendering again. */
995 int i_width = p_context->width;
996 int i_height = p_context->height;
997 avcodec_align_dimensions( p_context, &i_width, &i_height );
999 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
1000 p_context->pix_fmt == PIX_FMT_PAL8 )
1003 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1005 /* Get a new picture */
1006 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1009 bool b_compatible = true;
1010 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1011 p_pic->p[0].i_lines < i_height )
1012 b_compatible = false;
1013 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
1016 switch( p_sys->i_codec_id )
1026 i_align = i == 0 ? 16 : 8;
1029 if( p_pic->p[i].i_pitch % i_align )
1030 b_compatible = false;
1031 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1032 b_compatible = false;
1034 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
1036 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1037 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1038 b_compatible = false;
1042 decoder_DeletePicture( p_dec, p_pic );
1046 if( p_sys->i_direct_rendering_used != 1 )
1048 msg_Dbg( p_dec, "using direct rendering" );
1049 p_sys->i_direct_rendering_used = 1;
1052 p_context->draw_horiz_band = NULL;
1054 p_ff_pic->opaque = (void*)p_pic;
1055 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1056 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1057 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1058 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1059 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1061 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1062 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1063 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1064 p_ff_pic->linesize[3] = 0;
1066 #if LIBAVCODEC_VERSION_MAJOR < 54
1067 p_ff_pic->age = 256*256*256*64;
1074 if( p_sys->i_direct_rendering_used != 0 )
1076 msg_Warn( p_dec, "disabling direct rendering" );
1077 p_sys->i_direct_rendering_used = 0;
1080 return avcodec_default_get_buffer( p_context, p_ff_pic );
1082 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1084 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1086 /* We always use default reget function, it works perfectly fine */
1087 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1090 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1093 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1094 decoder_sys_t *p_sys = p_dec->p_sys;
1098 vlc_va_Release( p_sys->p_va, p_ff_pic );
1100 else if( !p_ff_pic->opaque )
1102 /* We can end up here without the AVFrame being allocated by
1103 * avcodec_default_get_buffer() if VA is used and the frame is
1104 * released when the decoder is closed
1106 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1107 avcodec_default_release_buffer( p_context, p_ff_pic );
1111 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1113 decoder_UnlinkPicture( p_dec, p_pic );
1115 for( int i = 0; i < 4; i++ )
1116 p_ff_pic->data[i] = NULL;
1119 static int ffmpeg_va_Start( void *func, va_list ap )
1121 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1122 int codec = va_arg( ap, int );
1123 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1124 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1126 return open( va, codec, fmt );
1129 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1130 const es_format_t *fmt )
1132 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1133 if( unlikely(p_va == NULL) )
1136 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1137 true, ffmpeg_va_Start, p_va,
1139 if( p_va->module == NULL )
1141 vlc_object_release( p_va );
1147 static void ffmpeg_va_Stop( void *func, va_list ap )
1149 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1150 void (*close)( vlc_va_t * ) = func;
1155 static void vlc_va_Delete( vlc_va_t *va )
1157 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1158 vlc_object_release( va );
1161 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1162 const enum PixelFormat *pi_fmt )
1164 decoder_t *p_dec = p_context->opaque;
1165 decoder_sys_t *p_sys = p_dec->p_sys;
1166 vlc_va_t *p_va = p_sys->p_va;
1169 vlc_va_Delete( p_va );
1171 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1174 /* Try too look for a supported hw acceleration */
1175 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1177 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1178 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1179 pi_fmt[i], name ? name : "unknown" );
1180 if( p_va->pix_fmt != pi_fmt[i] )
1183 /* We try to call vlc_va_Setup when possible to detect errors when
1184 * possible (later is too late) */
1185 if( p_context->width > 0 && p_context->height > 0
1186 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1187 &p_dec->fmt_out.video.i_chroma,
1188 p_context->width, p_context->height ) )
1190 msg_Err( p_dec, "acceleration setup failure" );
1194 if( p_va->description )
1195 msg_Info( p_dec, "Using %s for hardware decoding.",
1196 p_va->description );
1198 /* FIXME this will disable direct rendering
1199 * even if a new pixel format is renegotiated
1201 p_sys->b_direct_rendering = false;
1203 p_context->draw_horiz_band = NULL;
1207 msg_Err( p_dec, "acceleration not available" );
1208 vlc_va_Delete( p_va );
1212 /* Fallback to default behaviour */
1213 return avcodec_default_get_format( p_context, pi_fmt );