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 //AVPaletteControl palette;
90 #ifdef HAVE_AVCODEC_MT
91 # define wait_mt(s) vlc_sem_wait( &s->sem_mt )
92 # define post_mt(s) vlc_sem_post( &s->sem_mt )
98 /*****************************************************************************
100 *****************************************************************************/
101 static void ffmpeg_InitCodec ( decoder_t * );
102 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
103 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
104 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
105 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
106 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *,
107 const enum PixelFormat * );
108 static void vlc_va_Delete( vlc_va_t * );
110 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
112 uint8_t *p = (uint8_t*)&fcc;
113 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
116 /*****************************************************************************
118 *****************************************************************************/
120 /* Returns a new picture buffer */
121 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
122 AVCodecContext *p_context )
124 decoder_sys_t *p_sys = p_dec->p_sys;
126 p_dec->fmt_out.video.i_width = p_context->width;
127 p_dec->fmt_out.video.i_height = p_context->height;
129 if( !p_context->width || !p_context->height )
131 return NULL; /* invalid display size */
134 if( !p_sys->p_va && GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) )
136 /* we are doomed, but not really, because most codecs set their pix_fmt
138 * FIXME does it make sense here ? */
139 p_dec->fmt_out.video.i_chroma = VLC_CODEC_I420;
141 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
143 /* If an aspect-ratio was specified in the input format then force it */
144 if( p_dec->fmt_in.video.i_sar_num > 0 && p_dec->fmt_in.video.i_sar_den > 0 )
146 p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
147 p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
151 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
152 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
154 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
156 p_dec->fmt_out.video.i_sar_num = 1;
157 p_dec->fmt_out.video.i_sar_den = 1;
161 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
162 p_dec->fmt_in.video.i_frame_rate_base > 0 )
164 p_dec->fmt_out.video.i_frame_rate =
165 p_dec->fmt_in.video.i_frame_rate;
166 p_dec->fmt_out.video.i_frame_rate_base =
167 p_dec->fmt_in.video.i_frame_rate_base;
169 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
171 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
172 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
175 return decoder_NewPicture( p_dec );
178 /*****************************************************************************
179 * InitVideo: initialize the video decoder
180 *****************************************************************************
181 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
182 * opened (done after the first decoded frame).
183 *****************************************************************************/
184 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
185 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
187 decoder_sys_t *p_sys;
190 /* Allocate the memory needed to store the decoder's structure */
191 if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(decoder_sys_t) ) ) == NULL )
194 p_codec->type = AVMEDIA_TYPE_VIDEO;
195 p_context->codec_type = AVMEDIA_TYPE_VIDEO;
196 p_context->codec_id = i_codec_id;
197 p_sys->p_context = p_context;
198 p_sys->p_codec = p_codec;
199 p_sys->i_codec_id = i_codec_id;
200 p_sys->psz_namecodec = psz_namecodec;
201 p_sys->p_ff_pic = avcodec_alloc_frame();
202 p_sys->b_delayed_open = true;
204 vlc_sem_init( &p_sys->sem_mt, 0 );
206 /* ***** Fill p_context with init values ***** */
207 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_original_fourcc ?: p_dec->fmt_in.i_codec );
209 /* ***** Get configuration of ffmpeg plugin ***** */
210 p_sys->p_context->workaround_bugs =
211 var_InheritInteger( p_dec, "avcodec-workaround-bugs" );
212 p_sys->p_context->err_recognition =
213 var_InheritInteger( p_dec, "avcodec-error-resilience" );
215 if( var_CreateGetBool( p_dec, "grayscale" ) )
216 p_sys->p_context->flags |= CODEC_FLAG_GRAY;
218 i_val = var_CreateGetInteger( p_dec, "avcodec-vismv" );
219 if( i_val ) p_sys->p_context->debug_mv = i_val;
221 i_val = var_CreateGetInteger( p_dec, "avcodec-skiploopfilter" );
222 if( i_val >= 4 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
223 else if( i_val == 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
224 else if( i_val == 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
225 else if( i_val == 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
227 if( var_CreateGetBool( p_dec, "avcodec-fast" ) )
228 p_sys->p_context->flags2 |= CODEC_FLAG2_FAST;
230 #if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT( 54, 41, 0 )
231 if( var_InheritBool( p_dec, "avcodec-ignorecrop" ) )
232 p_sys->p_context->flags2 |= CODEC_FLAG2_IGNORE_CROP;
235 /* ***** libavcodec frame skipping ***** */
236 p_sys->b_hurry_up = var_CreateGetBool( p_dec, "avcodec-hurry-up" );
238 switch( var_CreateGetInteger( p_dec, "avcodec-skip-frame" ) )
241 p_sys->p_context->skip_frame = AVDISCARD_NONE;
244 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
247 p_sys->p_context->skip_frame = AVDISCARD_NONREF;
250 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
253 p_sys->p_context->skip_frame = AVDISCARD_ALL;
256 p_sys->p_context->skip_frame = AVDISCARD_NONE;
259 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
261 switch( var_CreateGetInteger( p_dec, "avcodec-skip-idct" ) )
264 p_sys->p_context->skip_idct = AVDISCARD_NONE;
267 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
270 p_sys->p_context->skip_idct = AVDISCARD_NONREF;
273 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
276 p_sys->p_context->skip_idct = AVDISCARD_ALL;
279 p_sys->p_context->skip_idct = AVDISCARD_NONE;
282 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
284 /* ***** libavcodec direct rendering ***** */
285 p_sys->b_direct_rendering = false;
286 p_sys->i_direct_rendering_used = -1;
287 if( var_CreateGetBool( p_dec, "avcodec-dr" ) &&
288 (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
289 /* No idea why ... but this fixes flickering on some TSCC streams */
290 p_sys->i_codec_id != AV_CODEC_ID_TSCC && p_sys->i_codec_id != AV_CODEC_ID_CSCD &&
291 p_sys->i_codec_id != AV_CODEC_ID_CINEPAK &&
292 !p_sys->p_context->debug_mv )
294 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
295 * so we need to do another check in ffmpeg_GetFrameBuf() */
296 p_sys->b_direct_rendering = true;
299 /* libavcodec doesn't properly release old pictures when frames are skipped */
300 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = false;
301 if( p_sys->b_direct_rendering )
303 msg_Dbg( p_dec, "trying to use direct rendering" );
304 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
308 msg_Dbg( p_dec, "direct rendering is disabled" );
311 /* Always use our get_buffer wrapper so we can calculate the
313 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
314 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
315 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
316 p_sys->p_context->opaque = p_dec;
318 #ifdef HAVE_AVCODEC_MT
319 int i_thread_count = var_InheritInteger( p_dec, "avcodec-threads" );
320 if( i_thread_count <= 0 )
322 i_thread_count = vlc_GetCPUCount();
323 if( i_thread_count > 1 )
326 //FIXME: take in count the decoding time
327 i_thread_count = __MIN( i_thread_count, 4 );
329 i_thread_count = __MIN( i_thread_count, 16 );
330 msg_Dbg( p_dec, "allowing %d thread(s) for decoding", i_thread_count );
331 p_sys->p_context->thread_count = i_thread_count;
334 char *hw = var_CreateGetString( p_dec, "avcodec-hw" ); /* FIXME */
335 if( (hw == NULL || strcasecmp( hw, "none" )) &&
336 (i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ||
337 i_codec_id == AV_CODEC_ID_MPEG4 ||
338 i_codec_id == AV_CODEC_ID_H264 ||
339 i_codec_id == AV_CODEC_ID_VC1 || i_codec_id == AV_CODEC_ID_WMV3) )
341 #ifdef HAVE_AVCODEC_MT
342 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
344 msg_Warn( p_dec, "threaded frame decoding is not compatible with libavcodec-hw, disabled" );
345 p_sys->p_context->thread_type &= ~FF_THREAD_FRAME;
347 if( ( p_sys->p_context->thread_type & FF_THREAD_SLICE ) &&
348 ( i_codec_id == AV_CODEC_ID_MPEG1VIDEO || i_codec_id == AV_CODEC_ID_MPEG2VIDEO ) )
350 msg_Warn( p_dec, "threaded slice decoding is not compatible with libavcodec-hw, disabled" );
351 p_sys->p_context->thread_type &= ~FF_THREAD_SLICE;
354 p_sys->p_context->get_format = ffmpeg_GetFormat;
357 #ifdef HAVE_AVCODEC_MT
358 if( p_sys->p_context->thread_type & FF_THREAD_FRAME )
359 p_dec->i_extra_picture_buffers = 2 * p_sys->p_context->thread_count;
363 /* ***** misc init ***** */
364 p_sys->i_pts = VLC_TS_INVALID;
365 p_sys->b_has_b_frames = false;
366 p_sys->b_first_frame = true;
367 p_sys->b_flush = false;
368 p_sys->i_late_frames = 0;
370 /* Set output properties */
371 p_dec->fmt_out.i_cat = VIDEO_ES;
372 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
374 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
375 p_dec->fmt_out.i_codec = VLC_CODEC_I420;
377 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
380 # warning FIXME: palette
382 /* ***** init this codec with special data ***** */
383 ffmpeg_InitCodec( p_dec );
385 /* ***** Open the codec ***** */
386 if( ffmpeg_OpenCodec( p_dec ) < 0 )
388 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
389 av_free( p_sys->p_ff_pic );
390 vlc_sem_destroy( &p_sys->sem_mt );
398 /*****************************************************************************
399 * DecodeVideo: Called to decode one or more frames
400 *****************************************************************************/
401 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
403 decoder_sys_t *p_sys = p_dec->p_sys;
404 AVCodecContext *p_context = p_sys->p_context;
406 int b_null_size = false;
409 if( !pp_block || !*pp_block )
412 if( !p_context->extradata_size && p_dec->fmt_in.i_extra )
414 ffmpeg_InitCodec( p_dec );
415 if( p_sys->b_delayed_open )
417 if( ffmpeg_OpenCodec( p_dec ) )
418 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
423 if( p_sys->b_delayed_open )
425 block_Release( p_block );
429 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
431 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
433 p_sys->i_late_frames = 0;
435 if( p_block->i_flags & BLOCK_FLAG_DISCONTINUITY )
436 avcodec_flush_buffers( p_context );
438 block_Release( p_block );
442 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
444 /* Do not care about late frames when prerolling
445 * TODO avoid decoding of non reference frame
446 * (ie all B except for H264 where it depends only on nal_ref_idc) */
447 p_sys->i_late_frames = 0;
450 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
451 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
453 if( p_sys->i_pts > VLC_TS_INVALID )
455 msg_Err( p_dec, "more than 5 seconds of late video -> "
456 "dropping frame (computer too slow ?)" );
457 p_sys->i_pts = VLC_TS_INVALID; /* To make sure we recover properly */
459 block_Release( p_block );
460 p_sys->i_late_frames--;
464 /* A good idea could be to decode all I pictures and see for the other */
465 if( !p_dec->b_pace_control &&
467 (p_sys->i_late_frames > 4) )
470 if( p_sys->i_late_frames < 12 )
472 p_context->skip_frame =
473 (p_sys->i_skip_frame <= AVDISCARD_NONREF) ?
474 AVDISCARD_NONREF : p_sys->i_skip_frame;
478 /* picture too late, won't decode
479 * but break picture until a new I, and for mpeg4 ...*/
480 p_sys->i_late_frames--; /* needed else it will never be decrease */
481 block_Release( p_block );
487 if( p_sys->b_hurry_up )
488 p_context->skip_frame = p_sys->i_skip_frame;
489 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
495 if( p_context->width <= 0 || p_context->height <= 0 )
497 if( p_sys->b_hurry_up )
498 p_context->skip_frame = p_sys->i_skip_frame;
501 else if( !b_drawpicture )
503 /* It creates broken picture
504 * FIXME either our parser or ffmpeg is broken */
506 if( p_sys->b_hurry_up )
507 p_context->skip_frame = __MAX( p_context->skip_frame,
513 * Do the actual decoding now */
515 /* Don't forget that libavcodec requires a little more bytes
516 * that the real frame size */
517 if( p_block->i_buffer > 0 )
519 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
521 p_block = block_Realloc( p_block, 0,
522 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE );
525 p_block->i_buffer -= FF_INPUT_BUFFER_PADDING_SIZE;
527 memset( p_block->p_buffer + p_block->i_buffer, 0,
528 FF_INPUT_BUFFER_PADDING_SIZE );
531 while( p_block->i_buffer > 0 || p_sys->b_flush )
533 int i_used, b_gotpicture;
537 /* Set the PTS/DTS in the context reordered_opaque field */
538 if( p_block->i_pts > VLC_TS_INVALID )
539 p_context->reordered_opaque = (p_block->i_pts << 1) | 0;
540 else if( p_block->i_dts > VLC_TS_INVALID )
541 p_context->reordered_opaque = (p_block->i_dts << 1) | 1;
543 p_context->reordered_opaque = INT64_MIN;
544 p_sys->p_ff_pic->reordered_opaque = p_context->reordered_opaque;
546 /* Make sure we don't reuse the same timestamps twice */
548 p_block->i_dts = VLC_TS_INVALID;
552 av_init_packet( &pkt );
553 pkt.data = p_block->p_buffer;
554 pkt.size = p_block->i_buffer;
555 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
556 &b_gotpicture, &pkt );
558 if( b_null_size && !p_sys->b_flush &&
559 p_context->width > 0 && p_context->height > 0 )
561 /* Reparse it to not drop the I frame */
563 if( p_sys->b_hurry_up )
564 p_context->skip_frame = p_sys->i_skip_frame;
565 i_used = avcodec_decode_video2( p_context, p_sys->p_ff_pic,
566 &b_gotpicture, &pkt );
571 p_sys->b_first_frame = true;
573 if( p_block->i_buffer <= 0 )
574 p_sys->b_flush = false;
579 msg_Warn( p_dec, "cannot decode one frame (%zu bytes)",
581 block_Release( p_block );
584 else if( i_used > p_block->i_buffer ||
585 p_context->thread_count > 1 )
587 i_used = p_block->i_buffer;
591 p_block->i_buffer -= i_used;
592 p_block->p_buffer += i_used;
594 /* Nothing to display */
597 if( i_used == 0 ) break;
601 /* Sanity check (seems to be needed for some streams) */
602 if( p_sys->p_ff_pic->pict_type == AV_PICTURE_TYPE_B)
604 p_sys->b_has_b_frames = true;
607 /* Compute the PTS */
608 mtime_t i_pts = VLC_TS_INVALID;
609 if( p_sys->p_ff_pic->reordered_opaque != INT64_MIN )
611 mtime_t i_ts = p_sys->p_ff_pic->reordered_opaque >> 1;
612 bool b_dts = p_sys->p_ff_pic->reordered_opaque & 1;
615 if( !p_context->has_b_frames ||
616 !p_sys->b_has_b_frames ||
617 !p_sys->p_ff_pic->reference ||
618 p_sys->i_pts <= VLC_TS_INVALID )
621 /* Guess what ? The rules are different for Real Video :( */
622 if( (p_dec->fmt_in.i_codec == VLC_CODEC_RV30 ||
623 p_dec->fmt_in.i_codec == VLC_CODEC_RV40) &&
624 p_sys->b_has_b_frames )
626 i_pts = VLC_TS_INVALID;
627 if(p_sys->p_ff_pic->reference) i_pts = i_ts;
635 if( i_pts <= VLC_TS_INVALID )
636 i_pts = p_sys->i_pts;
638 /* Interpolate the next PTS */
639 if( i_pts > VLC_TS_INVALID )
640 p_sys->i_pts = i_pts;
641 if( p_sys->i_pts > VLC_TS_INVALID )
643 /* interpolate the next PTS */
644 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
645 p_dec->fmt_in.video.i_frame_rate_base > 0 )
647 p_sys->i_pts += INT64_C(1000000) *
648 (2 + p_sys->p_ff_pic->repeat_pict) *
649 p_dec->fmt_in.video.i_frame_rate_base /
650 (2 * p_dec->fmt_in.video.i_frame_rate);
652 else if( p_context->time_base.den > 0 )
654 int i_tick = p_context->ticks_per_frame;
658 p_sys->i_pts += INT64_C(1000000) *
659 (2 + p_sys->p_ff_pic->repeat_pict) *
660 i_tick * p_context->time_base.num /
661 (2 * p_context->time_base.den);
665 /* Update frame late count (except when doing preroll) */
666 mtime_t i_display_date = 0;
667 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
668 i_display_date = decoder_GetDisplayDate( p_dec, i_pts );
670 if( i_display_date > 0 && i_display_date <= mdate() )
672 p_sys->i_late_frames++;
673 if( p_sys->i_late_frames == 1 )
674 p_sys->i_late_frames_start = mdate();
678 p_sys->i_late_frames = 0;
681 if( !b_drawpicture || ( !p_sys->p_va && !p_sys->p_ff_pic->linesize[0] ) )
684 if( p_sys->p_va != NULL || p_sys->p_ff_pic->opaque == NULL )
686 /* Get a new picture */
687 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
690 block_Release( p_block );
694 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
696 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
700 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
701 decoder_LinkPicture( p_dec, p_pic );
704 if( !p_dec->fmt_in.video.i_sar_num || !p_dec->fmt_in.video.i_sar_den )
706 /* Fetch again the aspect ratio in case it changed */
707 p_dec->fmt_out.video.i_sar_num
708 = p_context->sample_aspect_ratio.num;
709 p_dec->fmt_out.video.i_sar_den
710 = p_context->sample_aspect_ratio.den;
712 if( !p_dec->fmt_out.video.i_sar_num || !p_dec->fmt_out.video.i_sar_den )
714 p_dec->fmt_out.video.i_sar_num = 1;
715 p_dec->fmt_out.video.i_sar_den = 1;
719 /* Send decoded frame to vout */
720 if( i_pts > VLC_TS_INVALID)
724 if( p_sys->b_first_frame )
726 /* Hack to force display of still pictures */
727 p_sys->b_first_frame = false;
728 p_pic->b_force = true;
731 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
732 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
733 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
739 decoder_DeletePicture( p_dec, p_pic );
743 block_Release( p_block );
747 /*****************************************************************************
748 * EndVideo: decoder destruction
749 *****************************************************************************
750 * This function is called when the thread ends after a successful
752 *****************************************************************************/
753 void EndVideoDec( decoder_t *p_dec )
755 decoder_sys_t *p_sys = p_dec->p_sys;
759 /* do not flush buffers if codec hasn't been opened (theora/vorbis/VC1) */
760 if( p_sys->p_context->codec )
761 avcodec_flush_buffers( p_sys->p_context );
765 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
769 vlc_va_Delete( p_sys->p_va );
772 vlc_sem_destroy( &p_sys->sem_mt );
775 /*****************************************************************************
776 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
777 *****************************************************************************/
778 static void ffmpeg_InitCodec( decoder_t *p_dec )
780 decoder_sys_t *p_sys = p_dec->p_sys;
781 int i_size = p_dec->fmt_in.i_extra;
783 if( !i_size ) return;
785 if( p_sys->i_codec_id == AV_CODEC_ID_SVQ3 )
789 p_sys->p_context->extradata_size = i_size + 12;
790 p = p_sys->p_context->extradata =
791 malloc( p_sys->p_context->extradata_size );
795 memcpy( &p[0], "SVQ3", 4 );
796 memset( &p[4], 0, 8 );
797 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
799 /* Now remove all atoms before the SMI one */
800 if( p_sys->p_context->extradata_size > 0x5a &&
801 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
803 uint8_t *psz = &p[0x52];
805 while( psz < &p[p_sys->p_context->extradata_size - 8] )
807 int i_size = GetDWBE( psz );
810 /* FIXME handle 1 as long size */
813 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
815 memmove( &p[0x52], psz,
816 &p[p_sys->p_context->extradata_size] - psz );
826 p_sys->p_context->extradata_size = i_size;
827 p_sys->p_context->extradata =
828 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
829 if( p_sys->p_context->extradata )
831 memcpy( p_sys->p_context->extradata,
832 p_dec->fmt_in.p_extra, i_size );
833 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
834 0, FF_INPUT_BUFFER_PADDING_SIZE );
839 /*****************************************************************************
840 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
841 * picture_t structure (when not in direct rendering mode).
842 *****************************************************************************/
843 static void ffmpeg_CopyPicture( decoder_t *p_dec,
844 picture_t *p_pic, AVFrame *p_ff_pic )
846 decoder_sys_t *p_sys = p_dec->p_sys;
850 vlc_va_Extract( p_sys->p_va, p_pic, p_ff_pic );
852 else if( FindVlcChroma( p_sys->p_context->pix_fmt ) )
854 int i_plane, i_size, i_line;
855 uint8_t *p_dst, *p_src;
856 int i_src_stride, i_dst_stride;
858 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
860 p_src = p_ff_pic->data[i_plane];
861 p_dst = p_pic->p[i_plane].p_pixels;
862 i_src_stride = p_ff_pic->linesize[i_plane];
863 i_dst_stride = p_pic->p[i_plane].i_pitch;
865 i_size = __MIN( i_src_stride, i_dst_stride );
866 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
869 memcpy( p_dst, p_src, i_size );
870 p_src += i_src_stride;
871 p_dst += i_dst_stride;
877 const char *name = av_get_pix_fmt_name( p_sys->p_context->pix_fmt );
878 msg_Err( p_dec, "Unsupported decoded output format %d (%s)",
879 p_sys->p_context->pix_fmt, name ? name : "unknown" );
884 /*****************************************************************************
885 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
886 *****************************************************************************
887 * It is used for direct rendering as well as to get the right PTS for each
888 * decoded picture (even in indirect rendering mode).
889 *****************************************************************************/
890 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
893 decoder_t *p_dec = (decoder_t *)p_context->opaque;
894 decoder_sys_t *p_sys = p_dec->p_sys;
898 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
899 p_ff_pic->opaque = NULL;
903 /* hwaccel_context is not present in old ffmpeg version */
904 if( vlc_va_Setup( p_sys->p_va,
905 &p_context->hwaccel_context, &p_dec->fmt_out.video.i_chroma,
906 p_context->width, p_context->height ) )
908 msg_Err( p_dec, "vlc_va_Setup failed" );
913 p_ff_pic->type = FF_BUFFER_TYPE_USER;
915 if( vlc_va_Get( p_sys->p_va, p_ff_pic ) )
917 msg_Err( p_dec, "VaGrabSurface failed" );
922 else if( !p_sys->b_direct_rendering )
924 /* Not much to do in indirect rendering mode. */
925 return avcodec_default_get_buffer( p_context, p_ff_pic );
929 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
930 * so we need to check for direct rendering again. */
932 int i_width = p_context->width;
933 int i_height = p_context->height;
934 avcodec_align_dimensions( p_context, &i_width, &i_height );
936 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
937 p_context->pix_fmt == PIX_FMT_PAL8 )
940 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
942 /* Get a new picture */
943 p_pic = ffmpeg_NewPictBuf( p_dec, p_context );
946 bool b_compatible = true;
947 if( p_pic->p[0].i_pitch / p_pic->p[0].i_pixel_pitch < i_width ||
948 p_pic->p[0].i_lines < i_height )
949 b_compatible = false;
950 for( int i = 0; i < p_pic->i_planes && b_compatible; i++ )
953 switch( p_sys->i_codec_id )
955 case AV_CODEC_ID_SVQ1:
956 case AV_CODEC_ID_VP5:
957 case AV_CODEC_ID_VP6:
958 case AV_CODEC_ID_VP6F:
959 case AV_CODEC_ID_VP6A:
963 i_align = i == 0 ? 16 : 8;
966 if( p_pic->p[i].i_pitch % i_align )
967 b_compatible = false;
968 if( (intptr_t)p_pic->p[i].p_pixels % i_align )
969 b_compatible = false;
971 if( p_context->pix_fmt == PIX_FMT_YUV422P && b_compatible )
973 if( 2 * p_pic->p[1].i_pitch != p_pic->p[0].i_pitch ||
974 2 * p_pic->p[2].i_pitch != p_pic->p[0].i_pitch )
975 b_compatible = false;
979 decoder_DeletePicture( p_dec, p_pic );
983 if( p_sys->i_direct_rendering_used != 1 )
985 msg_Dbg( p_dec, "using direct rendering" );
986 p_sys->i_direct_rendering_used = 1;
989 p_context->draw_horiz_band = NULL;
991 p_ff_pic->opaque = (void*)p_pic;
992 p_ff_pic->type = FF_BUFFER_TYPE_USER;
993 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
994 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
995 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
996 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
998 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
999 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
1000 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
1001 p_ff_pic->linesize[3] = 0;
1007 if( p_sys->i_direct_rendering_used != 0 )
1009 msg_Warn( p_dec, "disabling direct rendering" );
1010 p_sys->i_direct_rendering_used = 0;
1013 return avcodec_default_get_buffer( p_context, p_ff_pic );
1015 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
1017 p_ff_pic->reordered_opaque = p_context->reordered_opaque;
1019 /* We always use default reget function, it works perfectly fine */
1020 return avcodec_default_reget_buffer( p_context, p_ff_pic );
1023 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
1026 decoder_t *p_dec = (decoder_t *)p_context->opaque;
1027 decoder_sys_t *p_sys = p_dec->p_sys;
1031 vlc_va_Release( p_sys->p_va, p_ff_pic );
1033 else if( !p_ff_pic->opaque )
1035 /* We can end up here without the AVFrame being allocated by
1036 * avcodec_default_get_buffer() if VA is used and the frame is
1037 * released when the decoder is closed
1039 if( p_ff_pic->type == FF_BUFFER_TYPE_INTERNAL )
1040 avcodec_default_release_buffer( p_context, p_ff_pic );
1044 picture_t *p_pic = (picture_t*)p_ff_pic->opaque;
1046 decoder_UnlinkPicture( p_dec, p_pic );
1048 for( int i = 0; i < 4; i++ )
1049 p_ff_pic->data[i] = NULL;
1052 static int ffmpeg_va_Start( void *func, va_list ap )
1054 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1055 int codec = va_arg( ap, int );
1056 const es_format_t *fmt = va_arg( ap, const es_format_t * );
1057 int (*open)( vlc_va_t *, int, const es_format_t * ) = func;
1059 return open( va, codec, fmt );
1062 static vlc_va_t *vlc_va_New( vlc_object_t *parent, int codec_id,
1063 const es_format_t *fmt )
1065 vlc_va_t *p_va = vlc_object_create( parent, sizeof( *p_va ) );
1066 if( unlikely(p_va == NULL) )
1069 p_va->module = vlc_module_load( p_va, "hw decoder", "$avcodec-hw",
1070 true, ffmpeg_va_Start, p_va,
1072 if( p_va->module == NULL )
1074 vlc_object_release( p_va );
1080 static void ffmpeg_va_Stop( void *func, va_list ap )
1082 vlc_va_t *va = va_arg( ap, vlc_va_t * );
1083 void (*close)( vlc_va_t * ) = func;
1088 static void vlc_va_Delete( vlc_va_t *va )
1090 vlc_module_unload( va->module, ffmpeg_va_Stop, va );
1091 vlc_object_release( va );
1094 static enum PixelFormat ffmpeg_GetFormat( AVCodecContext *p_context,
1095 const enum PixelFormat *pi_fmt )
1097 decoder_t *p_dec = p_context->opaque;
1098 decoder_sys_t *p_sys = p_dec->p_sys;
1099 vlc_va_t *p_va = p_sys->p_va;
1102 vlc_va_Delete( p_va );
1104 p_va = vlc_va_New( VLC_OBJECT(p_dec), p_sys->i_codec_id, &p_dec->fmt_in );
1107 /* Try too look for a supported hw acceleration */
1108 for( size_t i = 0; pi_fmt[i] != PIX_FMT_NONE; i++ )
1110 const char *name = av_get_pix_fmt_name(pi_fmt[i]);
1111 msg_Dbg( p_dec, "Available decoder output format %d (%s)",
1112 pi_fmt[i], name ? name : "unknown" );
1113 if( p_va->pix_fmt != pi_fmt[i] )
1116 /* We try to call vlc_va_Setup when possible to detect errors when
1117 * possible (later is too late) */
1118 if( p_context->width > 0 && p_context->height > 0
1119 && vlc_va_Setup( p_va, &p_context->hwaccel_context,
1120 &p_dec->fmt_out.video.i_chroma,
1121 p_context->width, p_context->height ) )
1123 msg_Err( p_dec, "acceleration setup failure" );
1127 if( p_va->description )
1128 msg_Info( p_dec, "Using %s for hardware decoding.",
1129 p_va->description );
1131 /* FIXME this will disable direct rendering
1132 * even if a new pixel format is renegotiated
1134 p_sys->b_direct_rendering = false;
1136 p_context->draw_horiz_band = NULL;
1140 msg_Err( p_dec, "acceleration not available" );
1141 vlc_va_Delete( p_va );
1145 /* Fallback to default behaviour */
1146 return avcodec_default_get_format( p_context, pi_fmt );