1 /*****************************************************************************
2 * video.c: video decoder using the ffmpeg 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>
35 #include <vlc_input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
36 #include <vlc_codecs.h> /* BITMAPINFOHEADER */
39 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
40 # include <libavcodec/avcodec.h>
41 #elif defined(HAVE_FFMPEG_AVCODEC_H)
42 # include <ffmpeg/avcodec.h>
50 /*****************************************************************************
51 * decoder_sys_t : decoder descriptor
52 *****************************************************************************/
57 /* Video decoder specific part */
63 BITMAPINFOHEADER *p_format;
65 /* for frame skipping algo */
67 enum AVDiscard i_skip_frame;
68 enum AVDiscard i_skip_idct;
70 /* how many decoded frames are late */
72 mtime_t i_late_frames_start;
74 /* for direct rendering */
75 int b_direct_rendering;
79 /* Hack to force display of still pictures */
82 int i_buffer_orig, i_buffer;
83 char *p_buffer_orig, *p_buffer;
86 /* FIXME (dummy palette for now) */
87 static AVPaletteControl palette_control;
89 /*****************************************************************************
91 *****************************************************************************/
92 static void ffmpeg_InitCodec ( decoder_t * );
93 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
94 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
95 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
96 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
98 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
100 uint8_t *p = (uint8_t*)&fcc;
101 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
104 /*****************************************************************************
106 *****************************************************************************/
108 /* Returns a new picture buffer */
109 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
110 AVCodecContext *p_context )
114 p_dec->fmt_out.video.i_width = p_context->width;
115 p_dec->fmt_out.video.i_height = p_context->height;
116 p_dec->fmt_out.i_codec = GetVlcChroma( p_context->pix_fmt );
118 if( !p_context->width || !p_context->height )
120 return NULL; /* invalid display size */
123 if( !p_dec->fmt_out.i_codec )
126 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
129 /* If an aspect-ratio was specified in the input format then force it */
130 if( p_dec->fmt_in.video.i_aspect )
132 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
136 p_dec->fmt_out.video.i_aspect =
137 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
138 p_context->width / p_context->height );
139 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
140 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
142 if( p_dec->fmt_out.video.i_aspect == 0 )
144 p_dec->fmt_out.video.i_aspect =
145 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
149 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
150 p_dec->fmt_out.video.i_frame_rate_base > 0 )
152 p_dec->fmt_out.video.i_frame_rate =
153 p_dec->fmt_in.video.i_frame_rate;
154 p_dec->fmt_out.video.i_frame_rate_base =
155 p_dec->fmt_in.video.i_frame_rate_base;
157 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
159 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
160 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
163 p_pic = p_dec->pf_vout_buffer_new( p_dec );
168 /*****************************************************************************
169 * InitVideo: initialize the video decoder
170 *****************************************************************************
171 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
172 * opened (done after the first decoded frame).
173 *****************************************************************************/
174 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
175 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
177 decoder_sys_t *p_sys;
180 /* Allocate the memory needed to store the decoder's structure */
181 if( ( p_dec->p_sys = p_sys =
182 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
186 memset( p_sys, 0, sizeof(decoder_sys_t) );
188 p_dec->p_sys->p_context = p_context;
189 p_dec->p_sys->p_codec = p_codec;
190 p_dec->p_sys->i_codec_id = i_codec_id;
191 p_dec->p_sys->psz_namecodec = psz_namecodec;
192 p_sys->p_ff_pic = avcodec_alloc_frame();
194 /* ***** Fill p_context with init values ***** */
195 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
196 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
197 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
198 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
200 /* ***** Get configuration of ffmpeg plugin ***** */
201 p_sys->p_context->workaround_bugs =
202 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
203 p_sys->p_context->error_resilience =
204 config_GetInt( p_dec, "ffmpeg-error-resilience" );
206 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
207 var_Get( p_dec, "grayscale", &val );
208 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
210 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
211 var_Get( p_dec, "ffmpeg-vismv", &val );
212 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
214 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
215 var_Get( p_dec, "ffmpeg-lowres", &val );
216 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
218 var_Create( p_dec, "ffmpeg-skiploopfilter",
219 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
220 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
221 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
222 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
223 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
224 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
226 /* ***** ffmpeg frame skipping ***** */
227 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
228 var_Get( p_dec, "ffmpeg-hurry-up", &val );
229 p_sys->b_hurry_up = val.b_bool;
231 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
232 var_Get( p_dec, "ffmpeg-skip-frame", &val );
236 p_sys->p_context->skip_frame = AVDISCARD_NONE;
239 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
242 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
245 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
248 p_sys->p_context->skip_frame = AVDISCARD_ALL;
251 p_sys->p_context->skip_frame = AVDISCARD_NONE;
254 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
256 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
257 var_Get( p_dec, "ffmpeg-skip-idct", &val );
261 p_sys->p_context->skip_idct = AVDISCARD_NONE;
264 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
267 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
270 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
273 p_sys->p_context->skip_idct = AVDISCARD_ALL;
276 p_sys->p_context->skip_idct = AVDISCARD_NONE;
279 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
281 /* ***** ffmpeg direct rendering ***** */
282 p_sys->b_direct_rendering = 0;
283 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
284 var_Get( p_dec, "ffmpeg-dr", &val );
285 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
286 /* Apparently direct rendering doesn't work with YUV422P */
287 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
288 /* H264 uses too many reference frames */
289 p_sys->i_codec_id != CODEC_ID_H264 &&
290 !p_sys->p_context->debug_mv )
292 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
293 * so we need to do another check in ffmpeg_GetFrameBuf() */
294 p_sys->b_direct_rendering = 1;
297 /* ffmpeg doesn't properly release old pictures when frames are skipped */
298 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
299 if( p_sys->b_direct_rendering )
301 msg_Dbg( p_dec, "using direct rendering" );
302 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
305 /* Always use our get_buffer wrapper so we can calculate the
307 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
308 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
309 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
310 p_sys->p_context->opaque = p_dec;
312 /* ***** init this codec with special data ***** */
313 ffmpeg_InitCodec( p_dec );
315 /* ***** misc init ***** */
316 p_sys->input_pts = p_sys->input_dts = 0;
318 p_sys->b_has_b_frames = false;
319 p_sys->b_first_frame = true;
320 p_sys->i_late_frames = 0;
322 p_sys->i_buffer_orig = 1;
323 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
324 if( !p_sys->p_buffer_orig )
330 /* Set output properties */
331 p_dec->fmt_out.i_cat = VIDEO_ES;
332 p_dec->fmt_out.i_codec = GetVlcChroma( p_context->pix_fmt );
335 if( p_dec->fmt_in.video.p_palette )
336 p_sys->p_context->palctrl =
337 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
338 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
339 p_sys->p_context->palctrl = &palette_control;
341 /* ***** Open the codec ***** */
342 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
345 free( p_sys->p_buffer_orig );
350 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
352 vlc_mutex_unlock( lock );
353 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
354 free( p_sys->p_buffer_orig );
358 vlc_mutex_unlock( lock );
359 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
365 /*****************************************************************************
366 * DecodeVideo: Called to decode one or more frames
367 *****************************************************************************/
368 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
370 decoder_sys_t *p_sys = p_dec->p_sys;
372 int b_null_size = false;
375 if( !pp_block || !*pp_block ) return NULL;
377 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
378 ffmpeg_InitCodec( p_dec );
382 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
385 p_sys->i_pts = 0; /* To make sure we recover properly */
387 p_sys->input_pts = p_sys->input_dts = 0;
388 p_sys->i_late_frames = 0;
390 block_Release( p_block );
392 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
393 //avcodec_flush_buffers( p_sys->p_context );
397 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
399 /* Do not care about late frames when prerolling
400 * TODO avoid decoding of non reference frame
401 * (ie all B except for H264 where it depends only on nal_ref_idc) */
402 p_sys->i_late_frames = 0;
405 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
406 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
410 msg_Err( p_dec, "more than 5 seconds of late video -> "
411 "dropping frame (computer too slow ?)" );
412 p_sys->i_pts = 0; /* To make sure we recover properly */
414 block_Release( p_block );
415 p_sys->i_late_frames--;
419 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
421 p_sys->input_pts = p_block->i_pts;
422 p_sys->input_dts = p_block->i_dts;
424 /* Make sure we don't reuse the same timestamps twice */
425 p_block->i_pts = p_block->i_dts = 0;
428 /* A good idea could be to decode all I pictures and see for the other */
429 if( !p_dec->b_pace_control &&
431 (p_sys->i_late_frames > 4) )
434 if( p_sys->i_late_frames < 8 )
436 p_sys->p_context->skip_frame =
437 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
438 AVDISCARD_BIDIR : p_sys->i_skip_frame;
442 /* picture too late, won't decode
443 * but break picture until a new I, and for mpeg4 ...*/
444 p_sys->i_late_frames--; /* needed else it will never be decrease */
445 block_Release( p_block );
452 if( p_sys->b_hurry_up )
453 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
454 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
460 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
462 if( p_sys->b_hurry_up )
463 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
468 * Do the actual decoding now
471 /* Don't forget that ffmpeg requires a little more bytes
472 * that the real frame size */
473 if( p_block->i_buffer > 0 )
475 p_sys->i_buffer = p_block->i_buffer;
476 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
477 p_sys->i_buffer_orig )
479 free( p_sys->p_buffer_orig );
480 p_sys->i_buffer_orig =
481 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
482 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
484 p_sys->p_buffer = p_sys->p_buffer_orig;
485 p_sys->i_buffer = p_block->i_buffer;
486 if( !p_sys->p_buffer )
488 block_Release( p_block );
491 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
492 memset( p_sys->p_buffer + p_block->i_buffer, 0,
493 FF_INPUT_BUFFER_PADDING_SIZE );
495 p_block->i_buffer = 0;
498 while( p_sys->i_buffer > 0 )
500 int i_used, b_gotpicture;
503 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
505 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
506 if( b_null_size && p_sys->p_context->width > 0 &&
507 p_sys->p_context->height > 0 )
509 /* Reparse it to not drop the I frame */
511 if( p_sys->b_hurry_up )
512 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
513 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
515 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
520 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
522 block_Release( p_block );
525 else if( i_used > p_sys->i_buffer )
527 i_used = p_sys->i_buffer;
531 p_sys->i_buffer -= i_used;
532 p_sys->p_buffer += i_used;
534 /* Nothing to display */
537 if( i_used == 0 ) break;
541 /* Update frame late count (except when doing preroll) */
542 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
543 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
545 p_sys->i_late_frames++;
546 if( p_sys->i_late_frames == 1 )
547 p_sys->i_late_frames_start = mdate();
551 p_sys->i_late_frames = 0;
554 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
556 /* Do not display the picture */
557 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
558 if( !b_drawpicture && p_pic )
559 p_dec->pf_vout_buffer_del( p_dec, p_pic );
563 if( !p_sys->p_ff_pic->opaque )
565 /* Get a new picture */
566 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
569 block_Release( p_block );
573 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
575 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
579 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
583 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
585 /* Sanity check (seems to be needed for some streams) */
586 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
588 p_sys->b_has_b_frames = true;
591 if( !p_dec->fmt_in.video.i_aspect )
593 /* Fetch again the aspect ratio in case it changed */
594 p_dec->fmt_out.video.i_aspect =
596 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
597 * p_sys->p_context->width / p_sys->p_context->height );
598 p_dec->fmt_out.video.i_sar_num
599 = p_sys->p_context->sample_aspect_ratio.num;
600 p_dec->fmt_out.video.i_sar_den
601 = p_sys->p_context->sample_aspect_ratio.den;
603 if( p_dec->fmt_out.video.i_aspect == 0 )
605 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
606 * p_sys->p_context->width / p_sys->p_context->height;
610 /* Send decoded frame to vout */
613 p_pic->date = p_sys->i_pts;
615 /* interpolate the next PTS */
616 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
617 p_dec->fmt_in.video.i_frame_rate_base > 0 )
619 p_sys->i_pts += INT64_C(1000000) *
620 (2 + p_sys->p_ff_pic->repeat_pict) *
621 p_dec->fmt_in.video.i_frame_rate_base *
622 p_block->i_rate / INPUT_RATE_DEFAULT /
623 (2 * p_dec->fmt_in.video.i_frame_rate);
625 else if( p_sys->p_context->time_base.den > 0 )
627 p_sys->i_pts += INT64_C(1000000) *
628 (2 + p_sys->p_ff_pic->repeat_pict) *
629 p_sys->p_context->time_base.num *
630 p_block->i_rate / INPUT_RATE_DEFAULT /
631 (2 * p_sys->p_context->time_base.den);
634 if( p_sys->b_first_frame )
636 /* Hack to force display of still pictures */
637 p_sys->b_first_frame = false;
638 p_pic->b_force = true;
641 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
642 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
643 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
649 p_dec->pf_vout_buffer_del( p_dec, p_pic );
653 block_Release( p_block );
657 /*****************************************************************************
658 * EndVideo: decoder destruction
659 *****************************************************************************
660 * This function is called when the thread ends after a successful
662 *****************************************************************************/
663 void EndVideoDec( decoder_t *p_dec )
665 decoder_sys_t *p_sys = p_dec->p_sys;
667 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
668 free( p_sys->p_buffer_orig );
671 /*****************************************************************************
672 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
673 *****************************************************************************/
674 static void ffmpeg_InitCodec( decoder_t *p_dec )
676 decoder_sys_t *p_sys = p_dec->p_sys;
677 int i_size = p_dec->fmt_in.i_extra;
679 if( !i_size ) return;
681 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
685 p_sys->p_context->extradata_size = i_size + 12;
686 p = p_sys->p_context->extradata =
687 malloc( p_sys->p_context->extradata_size );
691 memcpy( &p[0], "SVQ3", 4 );
692 memset( &p[4], 0, 8 );
693 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
695 /* Now remove all atoms before the SMI one */
696 if( p_sys->p_context->extradata_size > 0x5a &&
697 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
699 uint8_t *psz = &p[0x52];
701 while( psz < &p[p_sys->p_context->extradata_size - 8] )
703 int i_size = GetDWBE( psz );
706 /* FIXME handle 1 as long size */
709 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
711 memmove( &p[0x52], psz,
712 &p[p_sys->p_context->extradata_size] - psz );
720 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
721 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
722 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
724 if( p_dec->fmt_in.i_extra == 8 )
726 p_sys->p_context->extradata_size = 8;
727 p_sys->p_context->extradata = malloc( 8 );
728 if( p_sys->p_context->extradata )
730 memcpy( p_sys->p_context->extradata,
731 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
732 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
734 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
735 p_sys->p_context->sub_id );
741 p_sys->p_context->extradata_size = i_size;
742 p_sys->p_context->extradata =
743 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
744 if( p_sys->p_context->extradata )
746 memcpy( p_sys->p_context->extradata,
747 p_dec->fmt_in.p_extra, i_size );
748 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
749 0, FF_INPUT_BUFFER_PADDING_SIZE );
754 /*****************************************************************************
755 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
756 * picture_t structure (when not in direct rendering mode).
757 *****************************************************************************/
758 static void ffmpeg_CopyPicture( decoder_t *p_dec,
759 picture_t *p_pic, AVFrame *p_ff_pic )
761 decoder_sys_t *p_sys = p_dec->p_sys;
763 if( GetVlcChroma( p_sys->p_context->pix_fmt ) )
765 int i_plane, i_size, i_line;
766 uint8_t *p_dst, *p_src;
767 int i_src_stride, i_dst_stride;
769 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
771 p_src = p_ff_pic->data[i_plane];
772 p_dst = p_pic->p[i_plane].p_pixels;
773 i_src_stride = p_ff_pic->linesize[i_plane];
774 i_dst_stride = p_pic->p[i_plane].i_pitch;
776 i_size = __MIN( i_src_stride, i_dst_stride );
777 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
780 vlc_memcpy( p_dst, p_src, i_size );
781 p_src += i_src_stride;
782 p_dst += i_dst_stride;
788 msg_Err( p_dec, "don't know how to convert chroma %i",
789 p_sys->p_context->pix_fmt );
794 /*****************************************************************************
795 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
796 *****************************************************************************
797 * It is used for direct rendering as well as to get the right PTS for each
798 * decoded picture (even in indirect rendering mode).
799 *****************************************************************************/
800 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
802 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
805 decoder_t *p_dec = (decoder_t *)p_context->opaque;
806 decoder_sys_t *p_sys = p_dec->p_sys;
809 /* Set picture PTS */
810 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
813 p_ff_pic->opaque = 0;
815 /* Not much to do in indirect rendering mode */
816 if( !p_sys->b_direct_rendering )
818 return avcodec_default_get_buffer( p_context, p_ff_pic );
821 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
822 * so this check is necessary. */
823 if( !GetVlcChroma( p_context->pix_fmt ) ||
824 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
826 msg_Dbg( p_dec, "disabling direct rendering" );
827 p_sys->b_direct_rendering = 0;
828 return avcodec_default_get_buffer( p_context, p_ff_pic );
831 /* Get a new picture */
832 //p_sys->p_vout->render.b_allow_modify_pics = 0;
833 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
836 p_sys->b_direct_rendering = 0;
837 return avcodec_default_get_buffer( p_context, p_ff_pic );
839 p_sys->p_context->draw_horiz_band = NULL;
841 p_ff_pic->opaque = (void*)p_pic;
842 p_ff_pic->type = FF_BUFFER_TYPE_USER;
843 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
844 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
845 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
846 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
848 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
849 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
850 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
851 p_ff_pic->linesize[3] = 0;
853 if( p_ff_pic->reference != 0 )
855 p_dec->pf_picture_link( p_dec, p_pic );
858 /* FIXME what is that, should give good value */
859 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
863 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
865 decoder_t *p_dec = (decoder_t *)p_context->opaque;
867 /* Set picture PTS */
868 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
870 /* We always use default reget function, it works perfectly fine */
871 return avcodec_default_reget_buffer( p_context, p_ff_pic );
874 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
876 decoder_sys_t *p_sys = p_dec->p_sys;
878 /* Set picture PTS */
879 if( p_sys->input_pts )
881 p_ff_pic->pts = p_sys->input_pts;
883 else if( p_sys->input_dts )
885 /* Some demuxers only set the dts so let's try to find a useful
886 * timestamp from this */
887 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
888 !p_ff_pic->reference || !p_sys->i_pts )
890 p_ff_pic->pts = p_sys->input_dts;
892 else p_ff_pic->pts = 0;
894 else p_ff_pic->pts = 0;
896 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
898 p_sys->input_pts = p_sys->input_dts = 0;
902 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
905 decoder_t *p_dec = (decoder_t *)p_context->opaque;
908 if( !p_ff_pic->opaque )
910 avcodec_default_release_buffer( p_context, p_ff_pic );
914 p_pic = (picture_t*)p_ff_pic->opaque;
916 p_ff_pic->data[0] = NULL;
917 p_ff_pic->data[1] = NULL;
918 p_ff_pic->data[2] = NULL;
919 p_ff_pic->data[3] = NULL;
921 if( p_ff_pic->reference != 0 )
923 p_dec->pf_picture_unlink( p_dec, p_pic );