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 const 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 * );
97 static void ffmpeg_NextPts( decoder_t *, int i_block_rate );
99 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
101 uint8_t *p = (uint8_t*)&fcc;
102 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
105 /*****************************************************************************
107 *****************************************************************************/
109 /* Returns a new picture buffer */
110 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
111 AVCodecContext *p_context )
115 p_dec->fmt_out.video.i_width = p_context->width;
116 p_dec->fmt_out.video.i_height = p_context->height;
118 if( !p_context->width || !p_context->height )
120 return NULL; /* invalid display size */
123 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
126 msg_Err( p_dec, "avcodec does not know how to convert this chroma" );
127 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
129 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
131 /* If an aspect-ratio was specified in the input format then force it */
132 if( p_dec->fmt_in.video.i_aspect )
134 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
138 p_dec->fmt_out.video.i_aspect =
139 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
140 p_context->width / p_context->height );
141 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
142 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
144 if( p_dec->fmt_out.video.i_aspect == 0 )
146 p_dec->fmt_out.video.i_aspect =
147 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
151 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
152 p_dec->fmt_out.video.i_frame_rate_base > 0 )
154 p_dec->fmt_out.video.i_frame_rate =
155 p_dec->fmt_in.video.i_frame_rate;
156 p_dec->fmt_out.video.i_frame_rate_base =
157 p_dec->fmt_in.video.i_frame_rate_base;
159 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
161 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
162 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
165 p_pic = p_dec->pf_vout_buffer_new( p_dec );
170 /*****************************************************************************
171 * InitVideo: initialize the video decoder
172 *****************************************************************************
173 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
174 * opened (done after the first decoded frame).
175 *****************************************************************************/
176 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
177 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
179 decoder_sys_t *p_sys;
182 /* Allocate the memory needed to store the decoder's structure */
183 if( ( p_dec->p_sys = p_sys =
184 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
188 memset( p_sys, 0, sizeof(decoder_sys_t) );
190 p_dec->p_sys->p_context = p_context;
191 p_dec->p_sys->p_codec = p_codec;
192 p_dec->p_sys->i_codec_id = i_codec_id;
193 p_dec->p_sys->psz_namecodec = psz_namecodec;
194 p_sys->p_ff_pic = avcodec_alloc_frame();
196 /* ***** Fill p_context with init values ***** */
197 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
198 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
199 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
200 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
202 /* ***** Get configuration of ffmpeg plugin ***** */
203 p_sys->p_context->workaround_bugs =
204 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
205 p_sys->p_context->error_resilience =
206 config_GetInt( p_dec, "ffmpeg-error-resilience" );
208 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
209 var_Get( p_dec, "grayscale", &val );
210 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
212 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
213 var_Get( p_dec, "ffmpeg-vismv", &val );
214 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
216 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
217 var_Get( p_dec, "ffmpeg-lowres", &val );
218 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
220 var_Create( p_dec, "ffmpeg-skiploopfilter",
221 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
222 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
223 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
224 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
225 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
226 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
228 /* ***** ffmpeg frame skipping ***** */
229 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
230 var_Get( p_dec, "ffmpeg-hurry-up", &val );
231 p_sys->b_hurry_up = val.b_bool;
233 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
234 var_Get( p_dec, "ffmpeg-skip-frame", &val );
238 p_sys->p_context->skip_frame = AVDISCARD_NONE;
241 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
244 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
247 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
250 p_sys->p_context->skip_frame = AVDISCARD_ALL;
253 p_sys->p_context->skip_frame = AVDISCARD_NONE;
256 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
258 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
259 var_Get( p_dec, "ffmpeg-skip-idct", &val );
263 p_sys->p_context->skip_idct = AVDISCARD_NONE;
266 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
269 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
272 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
275 p_sys->p_context->skip_idct = AVDISCARD_ALL;
278 p_sys->p_context->skip_idct = AVDISCARD_NONE;
281 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
283 /* ***** ffmpeg direct rendering ***** */
284 p_sys->b_direct_rendering = 0;
285 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
286 var_Get( p_dec, "ffmpeg-dr", &val );
287 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
288 /* Apparently direct rendering doesn't work with YUV422P */
289 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
290 /* H264 uses too many reference frames */
291 p_sys->i_codec_id != CODEC_ID_H264 &&
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 = 1;
299 /* ffmpeg doesn't properly release old pictures when frames are skipped */
300 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
301 if( p_sys->b_direct_rendering )
303 msg_Dbg( p_dec, "using direct rendering" );
304 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
307 /* Always use our get_buffer wrapper so we can calculate the
309 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
310 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
311 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
312 p_sys->p_context->opaque = p_dec;
314 /* ***** init this codec with special data ***** */
315 ffmpeg_InitCodec( p_dec );
317 /* ***** misc init ***** */
318 p_sys->input_pts = p_sys->input_dts = 0;
320 p_sys->b_has_b_frames = false;
321 p_sys->b_first_frame = true;
322 p_sys->i_late_frames = 0;
324 p_sys->i_buffer_orig = 1;
325 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
326 if( !p_sys->p_buffer_orig )
332 /* Set output properties */
333 p_dec->fmt_out.i_cat = VIDEO_ES;
334 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
337 msg_Err( p_dec, "avcodec does not know how to convert this chroma" );
338 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
340 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
343 if( p_dec->fmt_in.video.p_palette )
344 p_sys->p_context->palctrl =
345 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
346 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
347 p_sys->p_context->palctrl = (AVPaletteControl *) &palette_control;
349 /* ***** Open the codec ***** */
350 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
353 free( p_sys->p_buffer_orig );
358 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
360 vlc_mutex_unlock( lock );
361 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
362 free( p_sys->p_buffer_orig );
366 vlc_mutex_unlock( lock );
367 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
373 /*****************************************************************************
374 * DecodeVideo: Called to decode one or more frames
375 *****************************************************************************/
376 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
378 decoder_sys_t *p_sys = p_dec->p_sys;
380 int b_null_size = false;
383 if( !pp_block || !*pp_block ) return NULL;
385 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
386 ffmpeg_InitCodec( p_dec );
390 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
393 p_sys->i_pts = 0; /* To make sure we recover properly */
395 p_sys->input_pts = p_sys->input_dts = 0;
396 p_sys->i_late_frames = 0;
398 block_Release( p_block );
400 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
401 //avcodec_flush_buffers( p_sys->p_context );
405 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
407 /* Do not care about late frames when prerolling
408 * TODO avoid decoding of non reference frame
409 * (ie all B except for H264 where it depends only on nal_ref_idc) */
410 p_sys->i_late_frames = 0;
413 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
414 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
418 msg_Err( p_dec, "more than 5 seconds of late video -> "
419 "dropping frame (computer too slow ?)" );
420 p_sys->i_pts = 0; /* To make sure we recover properly */
422 block_Release( p_block );
423 p_sys->i_late_frames--;
427 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
429 p_sys->input_pts = p_block->i_pts;
430 p_sys->input_dts = p_block->i_dts;
432 /* Make sure we don't reuse the same timestamps twice */
433 p_block->i_pts = p_block->i_dts = 0;
436 /* A good idea could be to decode all I pictures and see for the other */
437 if( !p_dec->b_pace_control &&
439 (p_sys->i_late_frames > 4) )
442 if( p_sys->i_late_frames < 12 )
444 p_sys->p_context->skip_frame =
445 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
446 AVDISCARD_BIDIR : p_sys->i_skip_frame;
450 /* picture too late, won't decode
451 * but break picture until a new I, and for mpeg4 ...*/
452 p_sys->i_late_frames--; /* needed else it will never be decrease */
453 block_Release( p_block );
460 if( p_sys->b_hurry_up )
461 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
462 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
468 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
470 if( p_sys->b_hurry_up )
471 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
476 * Do the actual decoding now
479 /* Don't forget that ffmpeg requires a little more bytes
480 * that the real frame size */
481 if( p_block->i_buffer > 0 )
483 p_sys->i_buffer = p_block->i_buffer;
484 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
485 p_sys->i_buffer_orig )
487 free( p_sys->p_buffer_orig );
488 p_sys->i_buffer_orig =
489 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
490 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
492 p_sys->p_buffer = p_sys->p_buffer_orig;
493 p_sys->i_buffer = p_block->i_buffer;
494 if( !p_sys->p_buffer )
496 block_Release( p_block );
499 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
500 memset( p_sys->p_buffer + p_block->i_buffer, 0,
501 FF_INPUT_BUFFER_PADDING_SIZE );
503 p_block->i_buffer = 0;
506 while( p_sys->i_buffer > 0 )
508 int i_used, b_gotpicture;
511 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
513 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
514 if( b_null_size && p_sys->p_context->width > 0 &&
515 p_sys->p_context->height > 0 )
517 /* Reparse it to not drop the I frame */
519 if( p_sys->b_hurry_up )
520 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
521 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
523 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
528 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
530 block_Release( p_block );
533 else if( i_used > p_sys->i_buffer )
535 i_used = p_sys->i_buffer;
539 p_sys->i_buffer -= i_used;
540 p_sys->p_buffer += i_used;
542 /* Nothing to display */
545 if( i_used == 0 ) break;
550 if( p_sys->p_ff_pic->pts )
551 p_sys->i_pts = p_sys->p_ff_pic->pts;
553 /* Update frame late count (except when doing preroll) */
554 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
555 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
557 p_sys->i_late_frames++;
558 if( p_sys->i_late_frames == 1 )
559 p_sys->i_late_frames_start = mdate();
563 p_sys->i_late_frames = 0;
566 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
568 /* Do not display the picture */
569 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
570 if( !b_drawpicture && p_pic )
571 p_dec->pf_vout_buffer_del( p_dec, p_pic );
573 ffmpeg_NextPts( p_dec, p_block->i_rate );
577 if( !p_sys->p_ff_pic->opaque )
579 /* Get a new picture */
580 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
583 block_Release( p_block );
587 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
589 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
593 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
596 /* Sanity check (seems to be needed for some streams) */
597 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
599 p_sys->b_has_b_frames = true;
602 if( !p_dec->fmt_in.video.i_aspect )
604 /* Fetch again the aspect ratio in case it changed */
605 p_dec->fmt_out.video.i_aspect =
607 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
608 * p_sys->p_context->width / p_sys->p_context->height );
609 p_dec->fmt_out.video.i_sar_num
610 = p_sys->p_context->sample_aspect_ratio.num;
611 p_dec->fmt_out.video.i_sar_den
612 = p_sys->p_context->sample_aspect_ratio.den;
614 if( p_dec->fmt_out.video.i_aspect == 0 )
616 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
617 * p_sys->p_context->width / p_sys->p_context->height;
621 /* Send decoded frame to vout */
624 p_pic->date = p_sys->i_pts;
626 ffmpeg_NextPts( p_dec, p_block->i_rate );
628 if( p_sys->b_first_frame )
630 /* Hack to force display of still pictures */
631 p_sys->b_first_frame = false;
632 p_pic->b_force = true;
635 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
636 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
637 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
643 p_dec->pf_vout_buffer_del( p_dec, p_pic );
647 block_Release( p_block );
651 /*****************************************************************************
652 * EndVideo: decoder destruction
653 *****************************************************************************
654 * This function is called when the thread ends after a successful
656 *****************************************************************************/
657 void EndVideoDec( decoder_t *p_dec )
659 decoder_sys_t *p_sys = p_dec->p_sys;
661 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
662 free( p_sys->p_buffer_orig );
665 /*****************************************************************************
666 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
667 *****************************************************************************/
668 static void ffmpeg_InitCodec( decoder_t *p_dec )
670 decoder_sys_t *p_sys = p_dec->p_sys;
671 int i_size = p_dec->fmt_in.i_extra;
673 if( !i_size ) return;
675 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
679 p_sys->p_context->extradata_size = i_size + 12;
680 p = p_sys->p_context->extradata =
681 malloc( p_sys->p_context->extradata_size );
685 memcpy( &p[0], "SVQ3", 4 );
686 memset( &p[4], 0, 8 );
687 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
689 /* Now remove all atoms before the SMI one */
690 if( p_sys->p_context->extradata_size > 0x5a &&
691 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
693 uint8_t *psz = &p[0x52];
695 while( psz < &p[p_sys->p_context->extradata_size - 8] )
697 int i_size = GetDWBE( psz );
700 /* FIXME handle 1 as long size */
703 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
705 memmove( &p[0x52], psz,
706 &p[p_sys->p_context->extradata_size] - psz );
714 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
715 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
716 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
718 if( p_dec->fmt_in.i_extra == 8 )
720 p_sys->p_context->extradata_size = 8;
721 p_sys->p_context->extradata = malloc( 8 );
722 if( p_sys->p_context->extradata )
724 memcpy( p_sys->p_context->extradata,
725 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
726 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
728 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
729 p_sys->p_context->sub_id );
735 p_sys->p_context->extradata_size = i_size;
736 p_sys->p_context->extradata =
737 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
738 if( p_sys->p_context->extradata )
740 memcpy( p_sys->p_context->extradata,
741 p_dec->fmt_in.p_extra, i_size );
742 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
743 0, FF_INPUT_BUFFER_PADDING_SIZE );
748 /*****************************************************************************
749 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
750 * picture_t structure (when not in direct rendering mode).
751 *****************************************************************************/
752 static void ffmpeg_CopyPicture( decoder_t *p_dec,
753 picture_t *p_pic, AVFrame *p_ff_pic )
755 decoder_sys_t *p_sys = p_dec->p_sys;
757 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) )
759 int i_plane, i_size, i_line;
760 uint8_t *p_dst, *p_src;
761 int i_src_stride, i_dst_stride;
763 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
765 p_src = p_ff_pic->data[i_plane];
766 p_dst = p_pic->p[i_plane].p_pixels;
767 i_src_stride = p_ff_pic->linesize[i_plane];
768 i_dst_stride = p_pic->p[i_plane].i_pitch;
770 i_size = __MIN( i_src_stride, i_dst_stride );
771 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
774 vlc_memcpy( p_dst, p_src, i_size );
775 p_src += i_src_stride;
776 p_dst += i_dst_stride;
782 msg_Err( p_dec, "don't know how to convert chroma %i",
783 p_sys->p_context->pix_fmt );
788 /*****************************************************************************
789 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
790 *****************************************************************************
791 * It is used for direct rendering as well as to get the right PTS for each
792 * decoded picture (even in indirect rendering mode).
793 *****************************************************************************/
794 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
796 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
799 decoder_t *p_dec = (decoder_t *)p_context->opaque;
800 decoder_sys_t *p_sys = p_dec->p_sys;
803 /* Set picture PTS */
804 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
807 p_ff_pic->opaque = 0;
809 /* Not much to do in indirect rendering mode */
810 if( !p_sys->b_direct_rendering )
812 return avcodec_default_get_buffer( p_context, p_ff_pic );
815 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
816 * so this check is necessary. */
817 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
818 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
820 msg_Dbg( p_dec, "disabling direct rendering" );
821 p_sys->b_direct_rendering = 0;
822 return avcodec_default_get_buffer( p_context, p_ff_pic );
824 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
826 /* Get a new picture */
827 //p_sys->p_vout->render.b_allow_modify_pics = 0;
828 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
831 p_sys->b_direct_rendering = 0;
832 return avcodec_default_get_buffer( p_context, p_ff_pic );
834 p_sys->p_context->draw_horiz_band = NULL;
836 p_ff_pic->opaque = (void*)p_pic;
837 p_ff_pic->type = FF_BUFFER_TYPE_USER;
838 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
839 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
840 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
841 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
843 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
844 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
845 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
846 p_ff_pic->linesize[3] = 0;
848 if( p_ff_pic->reference != 0 )
850 p_dec->pf_picture_link( p_dec, p_pic );
853 /* FIXME what is that, should give good value */
854 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
858 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
860 decoder_t *p_dec = (decoder_t *)p_context->opaque;
862 /* Set picture PTS */
863 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
865 /* We always use default reget function, it works perfectly fine */
866 return avcodec_default_reget_buffer( p_context, p_ff_pic );
869 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
871 decoder_sys_t *p_sys = p_dec->p_sys;
873 /* Set picture PTS */
874 if( p_sys->input_pts )
876 p_ff_pic->pts = p_sys->input_pts;
878 else if( p_sys->input_dts )
880 /* Some demuxers only set the dts so let's try to find a useful
881 * timestamp from this */
882 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
883 !p_ff_pic->reference || !p_sys->i_pts )
885 p_ff_pic->pts = p_sys->input_dts;
887 else p_ff_pic->pts = 0;
889 else p_ff_pic->pts = 0;
891 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
893 p_sys->input_pts = p_sys->input_dts = 0;
897 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
900 decoder_t *p_dec = (decoder_t *)p_context->opaque;
903 if( !p_ff_pic->opaque )
905 avcodec_default_release_buffer( p_context, p_ff_pic );
909 p_pic = (picture_t*)p_ff_pic->opaque;
911 p_ff_pic->data[0] = NULL;
912 p_ff_pic->data[1] = NULL;
913 p_ff_pic->data[2] = NULL;
914 p_ff_pic->data[3] = NULL;
916 if( p_ff_pic->reference != 0 )
918 p_dec->pf_picture_unlink( p_dec, p_pic );
922 static void ffmpeg_NextPts( decoder_t *p_dec, int i_block_rate )
924 decoder_sys_t *p_sys = p_dec->p_sys;
926 if( p_sys->i_pts <= 0 )
929 /* interpolate the next PTS */
930 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
931 p_dec->fmt_in.video.i_frame_rate_base > 0 )
933 p_sys->i_pts += INT64_C(1000000) *
934 (2 + p_sys->p_ff_pic->repeat_pict) *
935 p_dec->fmt_in.video.i_frame_rate_base *
936 i_block_rate / INPUT_RATE_DEFAULT /
937 (2 * p_dec->fmt_in.video.i_frame_rate);
939 else if( p_sys->p_context->time_base.den > 0 )
941 p_sys->i_pts += INT64_C(1000000) *
942 (2 + p_sys->p_ff_pic->repeat_pict) *
943 p_sys->p_context->time_base.num *
944 i_block_rate / INPUT_RATE_DEFAULT /
945 (2 * p_sys->p_context->time_base.den);