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 * );
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;
117 p_dec->fmt_out.i_codec = GetVlcChroma( p_context->pix_fmt );
119 if( !p_context->width || !p_context->height )
121 return NULL; /* invalid display size */
124 if( !p_dec->fmt_out.i_codec )
127 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
130 /* If an aspect-ratio was specified in the input format then force it */
131 if( p_dec->fmt_in.video.i_aspect )
133 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
137 p_dec->fmt_out.video.i_aspect =
138 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
139 p_context->width / p_context->height );
140 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
141 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
143 if( p_dec->fmt_out.video.i_aspect == 0 )
145 p_dec->fmt_out.video.i_aspect =
146 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
150 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
151 p_dec->fmt_out.video.i_frame_rate_base > 0 )
153 p_dec->fmt_out.video.i_frame_rate =
154 p_dec->fmt_in.video.i_frame_rate;
155 p_dec->fmt_out.video.i_frame_rate_base =
156 p_dec->fmt_in.video.i_frame_rate_base;
158 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
160 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
161 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
164 p_pic = p_dec->pf_vout_buffer_new( p_dec );
169 /*****************************************************************************
170 * InitVideo: initialize the video decoder
171 *****************************************************************************
172 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
173 * opened (done after the first decoded frame).
174 *****************************************************************************/
175 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
176 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
178 decoder_sys_t *p_sys;
181 /* Allocate the memory needed to store the decoder's structure */
182 if( ( p_dec->p_sys = p_sys =
183 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
187 memset( p_sys, 0, sizeof(decoder_sys_t) );
189 p_dec->p_sys->p_context = p_context;
190 p_dec->p_sys->p_codec = p_codec;
191 p_dec->p_sys->i_codec_id = i_codec_id;
192 p_dec->p_sys->psz_namecodec = psz_namecodec;
193 p_sys->p_ff_pic = avcodec_alloc_frame();
195 /* ***** Fill p_context with init values ***** */
196 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
197 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
198 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
199 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
201 /* ***** Get configuration of ffmpeg plugin ***** */
202 p_sys->p_context->workaround_bugs =
203 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
204 p_sys->p_context->error_resilience =
205 config_GetInt( p_dec, "ffmpeg-error-resilience" );
207 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
208 var_Get( p_dec, "grayscale", &val );
209 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
211 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
212 var_Get( p_dec, "ffmpeg-vismv", &val );
213 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
215 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
216 var_Get( p_dec, "ffmpeg-lowres", &val );
217 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
219 var_Create( p_dec, "ffmpeg-skiploopfilter",
220 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
221 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
222 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
223 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
224 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
225 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
227 /* ***** ffmpeg frame skipping ***** */
228 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
229 var_Get( p_dec, "ffmpeg-hurry-up", &val );
230 p_sys->b_hurry_up = val.b_bool;
232 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
233 var_Get( p_dec, "ffmpeg-skip-frame", &val );
237 p_sys->p_context->skip_frame = AVDISCARD_NONE;
240 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
243 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
246 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
249 p_sys->p_context->skip_frame = AVDISCARD_ALL;
252 p_sys->p_context->skip_frame = AVDISCARD_NONE;
255 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
257 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "ffmpeg-skip-idct", &val );
262 p_sys->p_context->skip_idct = AVDISCARD_NONE;
265 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
268 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
271 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
274 p_sys->p_context->skip_idct = AVDISCARD_ALL;
277 p_sys->p_context->skip_idct = AVDISCARD_NONE;
280 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
282 /* ***** ffmpeg direct rendering ***** */
283 p_sys->b_direct_rendering = 0;
284 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
285 var_Get( p_dec, "ffmpeg-dr", &val );
286 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
287 /* Apparently direct rendering doesn't work with YUV422P */
288 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
289 /* H264 uses too many reference frames */
290 p_sys->i_codec_id != CODEC_ID_H264 &&
291 !p_sys->p_context->debug_mv )
293 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
294 * so we need to do another check in ffmpeg_GetFrameBuf() */
295 p_sys->b_direct_rendering = 1;
298 /* ffmpeg doesn't properly release old pictures when frames are skipped */
299 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
300 if( p_sys->b_direct_rendering )
302 msg_Dbg( p_dec, "using direct rendering" );
303 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
306 /* Always use our get_buffer wrapper so we can calculate the
308 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
309 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
310 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
311 p_sys->p_context->opaque = p_dec;
313 /* ***** init this codec with special data ***** */
314 ffmpeg_InitCodec( p_dec );
316 /* ***** misc init ***** */
317 p_sys->input_pts = p_sys->input_dts = 0;
319 p_sys->b_has_b_frames = false;
320 p_sys->b_first_frame = true;
321 p_sys->i_late_frames = 0;
323 p_sys->i_buffer_orig = 1;
324 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
325 if( !p_sys->p_buffer_orig )
331 /* Set output properties */
332 p_dec->fmt_out.i_cat = VIDEO_ES;
333 p_dec->fmt_out.i_codec = GetVlcChroma( p_context->pix_fmt );
336 if( p_dec->fmt_in.video.p_palette )
337 p_sys->p_context->palctrl =
338 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
339 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
340 p_sys->p_context->palctrl = &palette_control;
342 /* ***** Open the codec ***** */
343 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
346 free( p_sys->p_buffer_orig );
351 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
353 vlc_mutex_unlock( lock );
354 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
355 free( p_sys->p_buffer_orig );
359 vlc_mutex_unlock( lock );
360 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
366 /*****************************************************************************
367 * DecodeVideo: Called to decode one or more frames
368 *****************************************************************************/
369 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
371 decoder_sys_t *p_sys = p_dec->p_sys;
373 int b_null_size = false;
376 if( !pp_block || !*pp_block ) return NULL;
378 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
379 ffmpeg_InitCodec( p_dec );
383 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
386 p_sys->i_pts = 0; /* To make sure we recover properly */
388 p_sys->input_pts = p_sys->input_dts = 0;
389 p_sys->i_late_frames = 0;
391 block_Release( p_block );
393 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
394 //avcodec_flush_buffers( p_sys->p_context );
398 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
400 /* Do not care about late frames when prerolling
401 * TODO avoid decoding of non reference frame
402 * (ie all B except for H264 where it depends only on nal_ref_idc) */
403 p_sys->i_late_frames = 0;
406 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
407 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
411 msg_Err( p_dec, "more than 5 seconds of late video -> "
412 "dropping frame (computer too slow ?)" );
413 p_sys->i_pts = 0; /* To make sure we recover properly */
415 block_Release( p_block );
416 p_sys->i_late_frames--;
420 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
422 p_sys->input_pts = p_block->i_pts;
423 p_sys->input_dts = p_block->i_dts;
425 /* Make sure we don't reuse the same timestamps twice */
426 p_block->i_pts = p_block->i_dts = 0;
429 /* A good idea could be to decode all I pictures and see for the other */
430 if( !p_dec->b_pace_control &&
432 (p_sys->i_late_frames > 4) )
435 if( p_sys->i_late_frames < 12 )
437 p_sys->p_context->skip_frame =
438 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
439 AVDISCARD_BIDIR : p_sys->i_skip_frame;
443 /* picture too late, won't decode
444 * but break picture until a new I, and for mpeg4 ...*/
445 p_sys->i_late_frames--; /* needed else it will never be decrease */
446 block_Release( p_block );
453 if( p_sys->b_hurry_up )
454 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
455 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
461 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
463 if( p_sys->b_hurry_up )
464 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
469 * Do the actual decoding now
472 /* Don't forget that ffmpeg requires a little more bytes
473 * that the real frame size */
474 if( p_block->i_buffer > 0 )
476 p_sys->i_buffer = p_block->i_buffer;
477 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
478 p_sys->i_buffer_orig )
480 free( p_sys->p_buffer_orig );
481 p_sys->i_buffer_orig =
482 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
483 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
485 p_sys->p_buffer = p_sys->p_buffer_orig;
486 p_sys->i_buffer = p_block->i_buffer;
487 if( !p_sys->p_buffer )
489 block_Release( p_block );
492 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
493 memset( p_sys->p_buffer + p_block->i_buffer, 0,
494 FF_INPUT_BUFFER_PADDING_SIZE );
496 p_block->i_buffer = 0;
499 while( p_sys->i_buffer > 0 )
501 int i_used, b_gotpicture;
504 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
506 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
507 if( b_null_size && p_sys->p_context->width > 0 &&
508 p_sys->p_context->height > 0 )
510 /* Reparse it to not drop the I frame */
512 if( p_sys->b_hurry_up )
513 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
514 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
516 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
521 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
523 block_Release( p_block );
526 else if( i_used > p_sys->i_buffer )
528 i_used = p_sys->i_buffer;
532 p_sys->i_buffer -= i_used;
533 p_sys->p_buffer += i_used;
535 /* Nothing to display */
538 if( i_used == 0 ) break;
543 if( p_sys->p_ff_pic->pts )
544 p_sys->i_pts = p_sys->p_ff_pic->pts;
546 /* Update frame late count (except when doing preroll) */
547 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
548 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
550 p_sys->i_late_frames++;
551 if( p_sys->i_late_frames == 1 )
552 p_sys->i_late_frames_start = mdate();
556 p_sys->i_late_frames = 0;
559 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
561 /* Do not display the picture */
562 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
563 if( !b_drawpicture && p_pic )
564 p_dec->pf_vout_buffer_del( p_dec, p_pic );
566 ffmpeg_NextPts( p_dec, p_block->i_rate );
570 if( !p_sys->p_ff_pic->opaque )
572 /* Get a new picture */
573 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
576 block_Release( p_block );
580 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
582 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
586 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
589 /* Sanity check (seems to be needed for some streams) */
590 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
592 p_sys->b_has_b_frames = true;
595 if( !p_dec->fmt_in.video.i_aspect )
597 /* Fetch again the aspect ratio in case it changed */
598 p_dec->fmt_out.video.i_aspect =
600 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
601 * p_sys->p_context->width / p_sys->p_context->height );
602 p_dec->fmt_out.video.i_sar_num
603 = p_sys->p_context->sample_aspect_ratio.num;
604 p_dec->fmt_out.video.i_sar_den
605 = p_sys->p_context->sample_aspect_ratio.den;
607 if( p_dec->fmt_out.video.i_aspect == 0 )
609 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
610 * p_sys->p_context->width / p_sys->p_context->height;
614 /* Send decoded frame to vout */
617 p_pic->date = p_sys->i_pts;
619 ffmpeg_NextPts( p_dec, p_block->i_rate );
621 if( p_sys->b_first_frame )
623 /* Hack to force display of still pictures */
624 p_sys->b_first_frame = false;
625 p_pic->b_force = true;
628 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
629 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
630 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
636 p_dec->pf_vout_buffer_del( p_dec, p_pic );
640 block_Release( p_block );
644 /*****************************************************************************
645 * EndVideo: decoder destruction
646 *****************************************************************************
647 * This function is called when the thread ends after a successful
649 *****************************************************************************/
650 void EndVideoDec( decoder_t *p_dec )
652 decoder_sys_t *p_sys = p_dec->p_sys;
654 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
655 free( p_sys->p_buffer_orig );
658 /*****************************************************************************
659 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
660 *****************************************************************************/
661 static void ffmpeg_InitCodec( decoder_t *p_dec )
663 decoder_sys_t *p_sys = p_dec->p_sys;
664 int i_size = p_dec->fmt_in.i_extra;
666 if( !i_size ) return;
668 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
672 p_sys->p_context->extradata_size = i_size + 12;
673 p = p_sys->p_context->extradata =
674 malloc( p_sys->p_context->extradata_size );
678 memcpy( &p[0], "SVQ3", 4 );
679 memset( &p[4], 0, 8 );
680 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
682 /* Now remove all atoms before the SMI one */
683 if( p_sys->p_context->extradata_size > 0x5a &&
684 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
686 uint8_t *psz = &p[0x52];
688 while( psz < &p[p_sys->p_context->extradata_size - 8] )
690 int i_size = GetDWBE( psz );
693 /* FIXME handle 1 as long size */
696 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
698 memmove( &p[0x52], psz,
699 &p[p_sys->p_context->extradata_size] - psz );
707 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
708 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
709 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
711 if( p_dec->fmt_in.i_extra == 8 )
713 p_sys->p_context->extradata_size = 8;
714 p_sys->p_context->extradata = malloc( 8 );
715 if( p_sys->p_context->extradata )
717 memcpy( p_sys->p_context->extradata,
718 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
719 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
721 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
722 p_sys->p_context->sub_id );
728 p_sys->p_context->extradata_size = i_size;
729 p_sys->p_context->extradata =
730 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
731 if( p_sys->p_context->extradata )
733 memcpy( p_sys->p_context->extradata,
734 p_dec->fmt_in.p_extra, i_size );
735 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
736 0, FF_INPUT_BUFFER_PADDING_SIZE );
741 /*****************************************************************************
742 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
743 * picture_t structure (when not in direct rendering mode).
744 *****************************************************************************/
745 static void ffmpeg_CopyPicture( decoder_t *p_dec,
746 picture_t *p_pic, AVFrame *p_ff_pic )
748 decoder_sys_t *p_sys = p_dec->p_sys;
750 if( GetVlcChroma( p_sys->p_context->pix_fmt ) )
752 int i_plane, i_size, i_line;
753 uint8_t *p_dst, *p_src;
754 int i_src_stride, i_dst_stride;
756 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
758 p_src = p_ff_pic->data[i_plane];
759 p_dst = p_pic->p[i_plane].p_pixels;
760 i_src_stride = p_ff_pic->linesize[i_plane];
761 i_dst_stride = p_pic->p[i_plane].i_pitch;
763 i_size = __MIN( i_src_stride, i_dst_stride );
764 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
767 vlc_memcpy( p_dst, p_src, i_size );
768 p_src += i_src_stride;
769 p_dst += i_dst_stride;
775 msg_Err( p_dec, "don't know how to convert chroma %i",
776 p_sys->p_context->pix_fmt );
781 /*****************************************************************************
782 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
783 *****************************************************************************
784 * It is used for direct rendering as well as to get the right PTS for each
785 * decoded picture (even in indirect rendering mode).
786 *****************************************************************************/
787 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
789 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
792 decoder_t *p_dec = (decoder_t *)p_context->opaque;
793 decoder_sys_t *p_sys = p_dec->p_sys;
796 /* Set picture PTS */
797 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
800 p_ff_pic->opaque = 0;
802 /* Not much to do in indirect rendering mode */
803 if( !p_sys->b_direct_rendering )
805 return avcodec_default_get_buffer( p_context, p_ff_pic );
808 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
809 * so this check is necessary. */
810 if( !GetVlcChroma( p_context->pix_fmt ) ||
811 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
813 msg_Dbg( p_dec, "disabling direct rendering" );
814 p_sys->b_direct_rendering = 0;
815 return avcodec_default_get_buffer( p_context, p_ff_pic );
818 /* Get a new picture */
819 //p_sys->p_vout->render.b_allow_modify_pics = 0;
820 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
823 p_sys->b_direct_rendering = 0;
824 return avcodec_default_get_buffer( p_context, p_ff_pic );
826 p_sys->p_context->draw_horiz_band = NULL;
828 p_ff_pic->opaque = (void*)p_pic;
829 p_ff_pic->type = FF_BUFFER_TYPE_USER;
830 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
831 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
832 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
833 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
835 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
836 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
837 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
838 p_ff_pic->linesize[3] = 0;
840 if( p_ff_pic->reference != 0 )
842 p_dec->pf_picture_link( p_dec, p_pic );
845 /* FIXME what is that, should give good value */
846 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
850 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
852 decoder_t *p_dec = (decoder_t *)p_context->opaque;
854 /* Set picture PTS */
855 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
857 /* We always use default reget function, it works perfectly fine */
858 return avcodec_default_reget_buffer( p_context, p_ff_pic );
861 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
863 decoder_sys_t *p_sys = p_dec->p_sys;
865 /* Set picture PTS */
866 if( p_sys->input_pts )
868 p_ff_pic->pts = p_sys->input_pts;
870 else if( p_sys->input_dts )
872 /* Some demuxers only set the dts so let's try to find a useful
873 * timestamp from this */
874 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
875 !p_ff_pic->reference || !p_sys->i_pts )
877 p_ff_pic->pts = p_sys->input_dts;
879 else p_ff_pic->pts = 0;
881 else p_ff_pic->pts = 0;
883 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
885 p_sys->input_pts = p_sys->input_dts = 0;
889 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
892 decoder_t *p_dec = (decoder_t *)p_context->opaque;
895 if( !p_ff_pic->opaque )
897 avcodec_default_release_buffer( p_context, p_ff_pic );
901 p_pic = (picture_t*)p_ff_pic->opaque;
903 p_ff_pic->data[0] = NULL;
904 p_ff_pic->data[1] = NULL;
905 p_ff_pic->data[2] = NULL;
906 p_ff_pic->data[3] = NULL;
908 if( p_ff_pic->reference != 0 )
910 p_dec->pf_picture_unlink( p_dec, p_pic );
914 static void ffmpeg_NextPts( decoder_t *p_dec, int i_block_rate )
916 decoder_sys_t *p_sys = p_dec->p_sys;
918 if( p_sys->i_pts <= 0 )
921 /* interpolate the next PTS */
922 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
923 p_dec->fmt_in.video.i_frame_rate_base > 0 )
925 p_sys->i_pts += INT64_C(1000000) *
926 (2 + p_sys->p_ff_pic->repeat_pict) *
927 p_dec->fmt_in.video.i_frame_rate_base *
928 i_block_rate / INPUT_RATE_DEFAULT /
929 (2 * p_dec->fmt_in.video.i_frame_rate);
931 else if( p_sys->p_context->time_base.den > 0 )
933 p_sys->i_pts += INT64_C(1000000) *
934 (2 + p_sys->p_ff_pic->repeat_pict) *
935 p_sys->p_context->time_base.num *
936 i_block_rate / INPUT_RATE_DEFAULT /
937 (2 * p_sys->p_context->time_base.den);