1 /*****************************************************************************
2 * video.c: video decoder using the libavcodec library
3 *****************************************************************************
4 * Copyright (C) 1999-2001 the VideoLAN team
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
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 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 General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, 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 #if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 52, 68, 2 ) ) && (LIBAVCODEC_VERSION_INT < AV_VERSION_INT( 52, 100, 1 ) )
297 /* avcodec native vp8 decode doesn't handle EMU_EDGE flag, and I
298 don't have idea howto implement fallback to libvpx decoder */
299 p_sys->i_codec_id != CODEC_ID_VP8 &&
301 !p_sys->p_context->debug_mv )
303 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
304 * so we need to do another check in ffmpeg_GetFrameBuf() */
305 p_sys->b_direct_rendering = true;
308 /* libavcodec doesn't properly release old pictures when frames are skipped */
309 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
310 if( p_sys->b_direct_rendering )
312 msg_Dbg( p_dec, "trying to use direct rendering" );
313 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
317 msg_Dbg( p_dec, "direct rendering is disabled" );
320 /* Always use our get_buffer wrapper so we can calculate the
322 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
323 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
324 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
325 p_sys->p_context->opaque = p_dec;
327 #ifdef HAVE_AVCODEC_MT
328 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
329 if( i_thread_count <= 0 )
331 i_thread_count = vlc_GetCPUCount();
332 if( i_thread_count > 1 )
335 //FIXME: take in count the decoding time
336 i_thread_count = __MIN( i_thread_count, 4 );
338 i_thread_count = __MIN( i_thread_count, 16 );
339 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
340 p_sys->p_context->thread_count = i_thread_count;
343 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
344 if( (hw == NULL || strcasecmp( hw, "none" )) &&
345 (i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ||
346 i_codec_id == CODEC_ID_MPEG4 ||
347 i_codec_id == CODEC_ID_H264 ||
348 i_codec_id == CODEC_ID_VC1 || i_codec_id == CODEC_ID_WMV3) )
350 #ifdef HAVE_AVCODEC_MT
351 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
353 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
354 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
356 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
357 ( i_codec_id == CODEC_ID_MPEG1VIDEO || i_codec_id == CODEC_ID_MPEG2VIDEO ) )
359 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
360 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
363 p_sys->p_context->get_format = ffmpeg_GetFormat;
366 #ifdef HAVE_AVCODEC_MT
367 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
368 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
372 /* ***** misc init ***** */
373 p_sys->i_pts = VLC_TS_INVALID;
374 p_sys->b_has_b_frames = false;
375 p_sys->b_first_frame = true;
376 p_sys->b_flush = false;
377 p_sys->i_late_frames = 0;
379 /* Set output properties */
380 p_dec->fmt_out.i_cat = VIDEO_ES;
381 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
383 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
384 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
386 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
388 #if LIBAVCODEC_VERSION_MAJOR < 54
390 memset( &p_sys->palette, 0, sizeof(p_sys->palette) );
391 if( p_dec->fmt_in.video.p_palette )
393 p_sys->palette.palette_changed = 1;
395 for( int i = 0; i < __MIN( AVPALETTE_COUNT, p_dec->fmt_in.video.p_palette->i_entries ); i++ )
401 c.a[0] = p_dec->fmt_in.video.p_palette->palette[i][0];
402 c.a[1] = p_dec->fmt_in.video.p_palette->palette[i][1];
403 c.a[2] = p_dec->fmt_in.video.p_palette->palette[i][2];
404 c.a[3] = p_dec->fmt_in.video.p_palette->palette[i][3];
406 p_sys->palette.palette[i] = c.u;
408 p_sys->p_context->palctrl = &p_sys->palette;
410 p_dec->fmt_out.video.p_palette = malloc( sizeof(video_palette_t) );
411 if( p_dec->fmt_out.video.p_palette )
412 *p_dec->fmt_out.video.p_palette = *p_dec->fmt_in.video.p_palette;
414 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
416 p_sys->p_context->palctrl = &p_sys->palette;
422 /* ***** init this codec with special data ***** */
423 ffmpeg_InitCodec( p_dec );
425 /* ***** Open the codec ***** */
426 if( ffmpeg_OpenCodec( p_dec ) < 0 )
428 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
429 av_free( p_sys->p_ff_pic );
430 vlc_sem_destroy( &p_sys->sem_mt );
438 /*****************************************************************************
439 * DecodeVideo: Called to decode one or more frames
440 *****************************************************************************/
441 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
443 decoder_sys_t *p_sys = p_dec->p_sys;
444 AVCodecContext *p_context = p_sys->p_context;
446 int b_null_size = false;
449 if( !pp_block || !*pp_block )
452 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
454 ffmpeg_InitCodec( p_dec );
455 if( p_sys->b_delayed_open )
457 if( ffmpeg_OpenCodec( p_dec ) )
458 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
463 if( p_sys->b_delayed_open )
465 block_Release( p_block );
469 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
471 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
473 p_sys->i_late_frames = 0;
475 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
476 avcodec_flush_buffers( p_context );
478 block_Release( p_block );
482 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
484 /* Do not care about late frames when prerolling
485 * TODO avoid decoding of non reference frame
486 * (ie all B except for H264 where it depends only on nal_ref_idc) */
487 p_sys->i_late_frames = 0;
490 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
491 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
493 if( p_sys->i_pts > VLC_TS_INVALID )
495 msg_Err( p_dec, "more than 5 seconds of late video -> "
496 "dropping frame (computer too slow ?)" );
497 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
499 block_Release( p_block );
500 p_sys->i_late_frames--;
504 /* A good idea could be to decode all I pictures and see for the other */
505 if( !p_dec->b_pace_control &&
507 (p_sys->i_late_frames > 4) )
510 if( p_sys->i_late_frames < 12 )
512 p_context->skip_frame =
513 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
514 AVDISCARD_NONREF : p_sys->i_skip_frame;
518 /* picture too late, won't decode
519 * but break picture until a new I, and for mpeg4 ...*/
520 p_sys->i_late_frames--; /* needed else it will never be decrease */
521 block_Release( p_block );
527 if( p_sys->b_hurry_up )
528 p_context->skip_frame = p_sys->i_skip_frame;
529 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
535 if( p_context->width <= 0 || p_context->height <= 0 )
537 if( p_sys->b_hurry_up )
538 p_context->skip_frame = p_sys->i_skip_frame;
541 else if( !b_drawpicture )
543 /* It creates broken picture
544 * FIXME either our parser or ffmpeg is broken */
546 if( p_sys->b_hurry_up )
547 p_context->skip_frame = __MAX( p_context->skip_frame,
553 * Do the actual decoding now */
555 /* Don't forget that libavcodec requires a little more bytes
556 * that the real frame size */
557 if( p_block->i_buffer > 0 )
559 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
561 p_block = block_Realloc( p_block, 0,
562 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
565 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
567 memset( p_block->p_buffer + p_block->i_buffer, 0,
568 FF_INPUT_BUFFER_PADDING_SIZE );
571 while( p_block->i_buffer > 0 || p_sys->b_flush )
573 int i_used, b_gotpicture;
577 /* Set the PTS/DTS in the context reordered_opaque field */
578 if( p_block->i_pts > VLC_TS_INVALID )
579 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
580 else if( p_block->i_dts > VLC_TS_INVALID )
581 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
583 p_context->reordered_opaque = INT64_MIN;
584 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
586 /* Make sure we don't reuse the same timestamps twice */
588 p_block->i_dts = VLC_TS_INVALID;
592 av_init_packet( &pkt );
593 pkt.data = p_block->p_buffer;
594 pkt.size = p_block->i_buffer;
595 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
596 &b_gotpicture, &pkt );
598 if( b_null_size && !p_sys->b_flush &&
599 p_context->width > 0 && p_context->height > 0 )
601 /* Reparse it to not drop the I frame */
603 if( p_sys->b_hurry_up )
604 p_context->skip_frame = p_sys->i_skip_frame;
605 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
606 &b_gotpicture, &pkt );
611 p_sys->b_first_frame = true;
613 if( p_block->i_buffer <= 0 )
614 p_sys->b_flush = false;
619 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
621 block_Release( p_block );
624 else if( i_used > p_block->i_buffer ||
625 p_context->thread_count > 1 )
627 i_used = p_block->i_buffer;
631 p_block->i_buffer -= i_used;
632 p_block->p_buffer += i_used;
634 /* Nothing to display */
637 if( i_used == 0 ) break;
641 /* Sanity check (seems to be needed for some streams) */
642 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
644 p_sys->b_has_b_frames = true;
647 /* Compute the PTS */
648 mtime_t i_pts = VLC_TS_INVALID;
649 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
651 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
652 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
655 if( !p_context->has_b_frames ||
656 !p_sys->b_has_b_frames ||
657 !p_sys->p_ff_pic->reference ||
658 p_sys->i_pts <= VLC_TS_INVALID )
661 /* Guess what ? The rules are different for Real Video :( */
662 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
663 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
664 p_sys->b_has_b_frames )
666 i_pts = VLC_TS_INVALID;
667 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
675 if( i_pts <= VLC_TS_INVALID )
676 i_pts = p_sys->i_pts;
678 /* Interpolate the next PTS */
679 if( i_pts > VLC_TS_INVALID )
680 p_sys->i_pts = i_pts;
681 if( p_sys->i_pts > VLC_TS_INVALID )
683 /* interpolate the next PTS */
684 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
685 p_dec->fmt_in.video.i_frame_rate_base > 0 )
687 p_sys->i_pts += INT64_C(1000000) *
688 (2 + p_sys->p_ff_pic->repeat_pict) *
689 p_dec->fmt_in.video.i_frame_rate_base /
690 (2 * p_dec->fmt_in.video.i_frame_rate);
692 else if( p_context->time_base.den > 0 )
694 int i_tick = p_context->ticks_per_frame;
698 p_sys->i_pts += INT64_C(1000000) *
699 (2 + p_sys->p_ff_pic->repeat_pict) *
700 i_tick * p_context->time_base.num /
701 (2 * p_context->time_base.den);
705 /* Update frame late count (except when doing preroll) */
706 mtime_t i_display_date = 0;
707 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
708 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
710 if( i_display_date > 0 && i_display_date <= mdate() )
712 p_sys->i_late_frames++;
713 if( p_sys->i_late_frames == 1 )
714 p_sys->i_late_frames_start = mdate();
718 p_sys->i_late_frames = 0;
721 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
724 if( !p_sys->p_ff_pic->opaque )
726 /* Get a new picture */
727 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
730 block_Release( p_block );
734 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
736 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
740 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
741 decoder_LinkPicture( p_dec, p_pic );
744 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
746 /* Fetch again the aspect ratio in case it changed */
747 p_dec->fmt_out.video.i_sar_num
748 = p_context->sample_aspect_ratio.num;
749 p_dec->fmt_out.video.i_sar_den
750 = p_context->sample_aspect_ratio.den;
752 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
754 p_dec->fmt_out.video.i_sar_num = 1;
755 p_dec->fmt_out.video.i_sar_den = 1;
759 /* Send decoded frame to vout */
760 if( i_pts > VLC_TS_INVALID)
764 if( p_sys->b_first_frame )
766 /* Hack to force display of still pictures */
767 p_sys->b_first_frame = false;
768 p_pic->b_force = true;
771 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
772 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
773 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
775 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
776 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
777 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
778 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
779 p_pic->i_qstride * i_mb_h );
780 switch( p_sys->p_ff_pic->qscale_type )
782 case FF_QSCALE_TYPE_MPEG1:
783 p_pic->i_qtype = QTYPE_MPEG1;
785 case FF_QSCALE_TYPE_MPEG2:
786 p_pic->i_qtype = QTYPE_MPEG2;
788 case FF_QSCALE_TYPE_H264:
789 p_pic->i_qtype = QTYPE_H264;
797 decoder_DeletePicture( p_dec, p_pic );
801 block_Release( p_block );
805 /*****************************************************************************
806 * EndVideo: decoder destruction
807 *****************************************************************************
808 * This function is called when the thread ends after a successful
810 *****************************************************************************/
811 void EndVideoDec( decoder_t *p_dec )
813 decoder_sys_t *p_sys = p_dec->p_sys;
817 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
818 if( p_sys->p_context->codec )
819 avcodec_flush_buffers( p_sys->p_context );
823 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
827 vlc_va_Delete( p_sys->p_va );
830 vlc_sem_destroy( &p_sys->sem_mt );
833 /*****************************************************************************
834 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
835 *****************************************************************************/
836 static void ffmpeg_InitCodec( decoder_t *p_dec )
838 decoder_sys_t *p_sys = p_dec->p_sys;
839 int i_size = p_dec->fmt_in.i_extra;
841 if( !i_size ) return;
843 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
847 p_sys->p_context->extradata_size = i_size + 12;
848 p = p_sys->p_context->extradata =
849 malloc( p_sys->p_context->extradata_size );
853 memcpy( &p[0], "SVQ3", 4 );
854 memset( &p[4], 0, 8 );
855 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
857 /* Now remove all atoms before the SMI one */
858 if( p_sys->p_context->extradata_size > 0x5a &&
859 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
861 uint8_t *psz = &p[0x52];
863 while( psz < &p[p_sys->p_context->extradata_size - 8] )
865 int i_size = GetDWBE( psz );
868 /* FIXME handle 1 as long size */
871 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
873 memmove( &p[0x52], psz,
874 &p[p_sys->p_context->extradata_size] - psz );
884 p_sys->p_context->extradata_size = i_size;
885 p_sys->p_context->extradata =
886 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
887 if( p_sys->p_context->extradata )
889 memcpy( p_sys->p_context->extradata,
890 p_dec->fmt_in.p_extra, i_size );
891 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
892 0, FF_INPUT_BUFFER_PADDING_SIZE );
897 /*****************************************************************************
898 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
899 * picture_t structure (when not in direct rendering mode).
900 *****************************************************************************/
901 static void ffmpeg_CopyPicture( decoder_t *p_dec,
902 picture_t *p_pic, AVFrame *p_ff_pic )
904 decoder_sys_t *p_sys = p_dec->p_sys;
908 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
910 else if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
912 int i_plane, i_size, i_line;
913 uint8_t *p_dst, *p_src;
914 int i_src_stride, i_dst_stride;
916 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
918 p_src = p_ff_pic->data[i_plane];
919 p_dst = p_pic->p[i_plane].p_pixels;
920 i_src_stride = p_ff_pic->linesize[i_plane];
921 i_dst_stride = p_pic->p[i_plane].i_pitch;
923 i_size = __MIN( i_src_stride, i_dst_stride );
924 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
927 memcpy( p_dst, p_src, i_size );
928 p_src += i_src_stride;
929 p_dst += i_dst_stride;
935 msg_Err( p_dec, "don't know how to convert chroma %i",
936 p_sys->p_context->pix_fmt );
941 /*****************************************************************************
942 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
943 *****************************************************************************
944 * It is used for direct rendering as well as to get the right PTS for each
945 * decoded picture (even in indirect rendering mode).
946 *****************************************************************************/
947 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
950 decoder_t *p_dec = (decoder_t *)p_context->opaque;
951 decoder_sys_t *p_sys = p_dec->p_sys;
955 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
956 p_ff_pic->opaque = NULL;
960 #if 1 // LIBAVCODEC_VERSION_MAJOR >= ? FIXME
961 /* hwaccel_context is not present in old ffmpeg version */
962 if( vlc_va_Setup( p_sys->p_va,
963 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
964 p_context->width, p_context->height ) )
966 msg_Err( p_dec, "vlc_va_Setup failed" );
974 p_ff_pic->type = FF_BUFFER_TYPE_USER;
976 #if LIBAVCODEC_VERSION_MAJOR < 54
977 p_ff_pic->age = 256*256*256*64;
980 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
982 msg_Err( p_dec, "VaGrabSurface failed" );
987 else if( !p_sys->b_direct_rendering )
989 /* Not much to do in indirect rendering mode. */
990 return avcodec_default_get_buffer( p_context, p_ff_pic );
994 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
995 * so we need to check for direct rendering again. */
997 int i_width = p_context->width;
998 int i_height = p_context->height;
999 avcodec_align_dimensions( p_context, &i_width, &i_height );
1001 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
1002 p_context->pix_fmt == PIX_FMT_PAL8 )
1005 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
1007 /* Get a new picture */
1008 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
1011 bool b_compatible = true;
1012 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
1013 p_pic->p[0].i_lines < i_height )
1014 b_compatible = false;
1015 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
1018 switch( p_sys->i_codec_id )
1028 i_align = i == 0 ? 16 : 8;
1031 if( p_pic->p[i].i_pitch % i_align )
1032 b_compatible = false;
1033 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
1034 b_compatible = false;
1036 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
1038 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
1039 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
1040 b_compatible = false;
1044 decoder_DeletePicture( p_dec, p_pic );
1048 if( p_sys->i_direct_rendering_used != 1 )
1050 msg_Dbg( p_dec, "using direct rendering" );
1051 p_sys->i_direct_rendering_used = 1;
1054 p_context->draw_horiz_band = NULL;
1056 p_ff_pic->opaque = (void*)p_pic;
1057 p_ff_pic->type = FF_BUFFER_TYPE_USER;
1058 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
1059 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
1060 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
1061 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
1063 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
1064 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1065 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1066 p_ff_pic->linesize[3] = 0;
1068 #if LIBAVCODEC_VERSION_MAJOR < 54
1069 p_ff_pic->age = 256*256*256*64;
1076 if( p_sys->i_direct_rendering_used != 0 )
1078 msg_Warn( p_dec, "disabling direct rendering" );
1079 p_sys->i_direct_rendering_used = 0;
1082 return avcodec_default_get_buffer( p_context, p_ff_pic );
1084 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1086 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1088 /* We always use default reget function, it works perfectly fine */
1089 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1092 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1095 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1096 decoder_sys_t *p_sys = p_dec->p_sys;
1100 vlc_va_Release( p_sys->p_va, p_ff_pic );
1102 else if( !p_ff_pic->opaque )
1104 /* We can end up here without the AVFrame being allocated by
1105 * avcodec_default_get_buffer() if VA is used and the frame is
1106 * released when the decoder is closed
1108 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1109 avcodec_default_release_buffer( p_context, p_ff_pic );
1113 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1115 decoder_UnlinkPicture( p_dec, p_pic );
1117 for( int i = 0; i < 4; i++ )
1118 p_ff_pic->data[i] = NULL;
1121 static int ffmpeg_va_Start( void *func, va_list ap )
1123 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1124 int codec = va_arg( ap, int );
1125 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1126 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1128 return open( va, codec, fmt );
1131 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1132 const es_format_t *fmt )
1134 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1135 if( unlikely(p_va == NULL) )
1138 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1139 true, ffmpeg_va_Start, p_va,
1141 if( p_va->module == NULL )
1143 vlc_object_release( p_va );
1149 static void ffmpeg_va_Stop( void *func, va_list ap )
1151 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1152 void (*close)( vlc_va_t * ) = func;
1157 static void vlc_va_Delete( vlc_va_t *va )
1159 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1160 vlc_object_release( va );
1163 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1164 const enum PixelFormat *pi_fmt )
1166 decoder_t *p_dec = p_context->opaque;
1167 decoder_sys_t *p_sys = p_dec->p_sys;
1168 vlc_va_t *p_va = p_sys->p_va;
1171 vlc_va_Delete( p_va );
1173 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1176 /* Try too look for a supported hw acceleration */
1177 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1179 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1180 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1181 pi_fmt[i], name ? name : "unknown" );
1182 if( p_va->pix_fmt != pi_fmt[i] )
1185 /* We try to call vlc_va_Setup when possible to detect errors when
1186 * possible (later is too late) */
1187 if( p_context->width > 0 && p_context->height > 0
1188 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1189 &p_dec->fmt_out.video.i_chroma,
1190 p_context->width, p_context->height ) )
1192 msg_Err( p_dec, "acceleration setup failure" );
1196 if( p_va->description )
1197 msg_Info( p_dec, "Using %s for hardware decoding.",
1198 p_va->description );
1200 /* FIXME this will disable direct rendering
1201 * even if a new pixel format is renegotiated
1203 p_sys->b_direct_rendering = false;
1205 p_context->draw_horiz_band = NULL;
1209 msg_Err( p_dec, "acceleration not available" );
1210 vlc_va_Delete( p_va );
1214 /* Fallback to default behaviour */
1215 return avcodec_default_get_format( p_context, pi_fmt );