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 *****************************************************************************/
33 #include <vlc_codec.h>
35 #include <vlc_input.h> /* hmmm, just for INPUT_RATE_DEFAULT */
38 #if defined(HAVE_LIBAVCODEC_AVCODEC_H)
39 # include <libavcodec/avcodec.h>
40 #elif defined(HAVE_FFMPEG_AVCODEC_H)
41 # include <ffmpeg/avcodec.h>
48 /*****************************************************************************
49 * decoder_sys_t : decoder descriptor
50 *****************************************************************************/
55 /* Video decoder specific part */
61 BITMAPINFOHEADER *p_format;
63 /* for frame skipping algo */
65 enum AVDiscard i_skip_frame;
66 enum AVDiscard i_skip_idct;
68 /* how many decoded frames are late */
70 mtime_t i_late_frames_start;
72 /* for direct rendering */
73 int b_direct_rendering;
75 vlc_bool_t b_has_b_frames;
77 /* Hack to force display of still pictures */
78 vlc_bool_t b_first_frame;
80 int i_buffer_orig, i_buffer;
81 char *p_buffer_orig, *p_buffer;
83 /* Postprocessing handle */
86 vlc_bool_t b_pp_async;
90 /* FIXME (dummy palette for now) */
91 static AVPaletteControl palette_control;
93 /*****************************************************************************
95 *****************************************************************************/
96 static void ffmpeg_InitCodec ( decoder_t * );
97 static void ffmpeg_CopyPicture ( decoder_t *, picture_t *, AVFrame * );
98 static int ffmpeg_GetFrameBuf ( struct AVCodecContext *, AVFrame * );
99 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
101 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
103 uint8_t *p = (uint8_t*)&fcc;
104 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
107 /*****************************************************************************
109 *****************************************************************************/
110 static uint32_t ffmpeg_PixFmtToChroma( int i_ff_chroma )
112 switch( i_ff_chroma )
114 case PIX_FMT_YUV420P:
115 case PIX_FMT_YUVJ420P: /* Hacky but better then chroma conversion */
116 return VLC_FOURCC('I','4','2','0');
117 case PIX_FMT_YUV422P:
118 case PIX_FMT_YUVJ422P: /* Hacky but better then chroma conversion */
119 return VLC_FOURCC('I','4','2','2');
120 case PIX_FMT_YUV444P:
121 case PIX_FMT_YUVJ444P: /* Hacky but better then chroma conversion */
122 return VLC_FOURCC('I','4','4','4');
125 return VLC_FOURCC('Y','U','Y','2');
128 return VLC_FOURCC('R','V','1','5');
130 return VLC_FOURCC('R','V','1','6');
132 return VLC_FOURCC('R','V','2','4');
134 return VLC_FOURCC('R','V','3','2');
137 return VLC_FOURCC('R','G','B','A');
140 return VLC_FOURCC('G','R','E','Y');
142 case PIX_FMT_YUV410P:
143 case PIX_FMT_YUV411P:
150 /* Returns a new picture buffer */
151 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
152 AVCodecContext *p_context )
154 decoder_sys_t *p_sys = p_dec->p_sys;
157 p_dec->fmt_out.video.i_width = p_context->width;
158 p_dec->fmt_out.video.i_height = p_context->height;
159 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
161 if( !p_context->width || !p_context->height )
163 return NULL; /* invalid display size */
166 if( !p_dec->fmt_out.i_codec )
168 /* we make conversion if possible*/
169 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
172 /* If an aspect-ratio was specified in the input format then force it */
173 if( p_dec->fmt_in.video.i_aspect )
175 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
179 p_dec->fmt_out.video.i_aspect =
180 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
181 p_context->width / p_context->height );
182 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
183 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
185 if( p_dec->fmt_out.video.i_aspect == 0 )
187 p_dec->fmt_out.video.i_aspect =
188 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
192 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
193 p_dec->fmt_out.video.i_frame_rate_base > 0 )
195 p_dec->fmt_out.video.i_frame_rate =
196 p_dec->fmt_in.video.i_frame_rate;
197 p_dec->fmt_out.video.i_frame_rate_base =
198 p_dec->fmt_in.video.i_frame_rate_base;
200 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
202 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
203 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
206 p_pic = p_dec->pf_vout_buffer_new( p_dec );
208 if( p_sys->p_pp && p_sys->b_pp && !p_sys->b_pp_init )
210 E_(InitPostproc)( p_sys->p_pp, p_context->width,
211 p_context->height, p_context->pix_fmt );
212 p_sys->b_pp_init = VLC_TRUE;
218 /*****************************************************************************
219 * InitVideo: initialize the video decoder
220 *****************************************************************************
221 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
222 * opened (done after the first decoded frame).
223 *****************************************************************************/
224 int E_(InitVideoDec)( decoder_t *p_dec, AVCodecContext *p_context,
225 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
227 decoder_sys_t *p_sys;
230 /* Allocate the memory needed to store the decoder's structure */
231 if( ( p_dec->p_sys = p_sys =
232 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
234 msg_Err( p_dec, "out of memory" );
237 memset( p_sys, 0, sizeof(decoder_sys_t) );
239 p_dec->p_sys->p_context = p_context;
240 p_dec->p_sys->p_codec = p_codec;
241 p_dec->p_sys->i_codec_id = i_codec_id;
242 p_dec->p_sys->psz_namecodec = psz_namecodec;
243 p_sys->p_ff_pic = avcodec_alloc_frame();
245 /* ***** Fill p_context with init values ***** */
246 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
247 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
248 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
249 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
251 /* ***** Get configuration of ffmpeg plugin ***** */
252 p_sys->p_context->workaround_bugs =
253 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
254 p_sys->p_context->error_resilience =
255 config_GetInt( p_dec, "ffmpeg-error-resilience" );
257 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
258 var_Get( p_dec, "grayscale", &val );
259 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
261 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "ffmpeg-vismv", &val );
263 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
265 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
266 var_Get( p_dec, "ffmpeg-lowres", &val );
267 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
269 var_Create( p_dec, "ffmpeg-skiploopfilter",
270 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
271 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
272 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
273 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
274 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
275 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
277 /* ***** ffmpeg frame skipping ***** */
278 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
279 var_Get( p_dec, "ffmpeg-hurry-up", &val );
280 p_sys->b_hurry_up = val.b_bool;
282 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
283 var_Get( p_dec, "ffmpeg-skip-frame", &val );
287 p_sys->p_context->skip_frame = AVDISCARD_NONE;
290 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
293 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
296 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
299 p_sys->p_context->skip_frame = AVDISCARD_ALL;
302 p_sys->p_context->skip_frame = AVDISCARD_NONE;
305 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
307 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
308 var_Get( p_dec, "ffmpeg-skip-idct", &val );
312 p_sys->p_context->skip_idct = AVDISCARD_NONE;
315 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
318 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
321 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
324 p_sys->p_context->skip_idct = AVDISCARD_ALL;
327 p_sys->p_context->skip_idct = AVDISCARD_NONE;
330 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
332 /* ***** ffmpeg direct rendering ***** */
333 p_sys->b_direct_rendering = 0;
334 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
335 var_Get( p_dec, "ffmpeg-dr", &val );
336 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
337 /* Apparently direct rendering doesn't work with YUV422P */
338 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
339 /* H264 uses too many reference frames */
340 p_sys->i_codec_id != CODEC_ID_H264 &&
341 !p_sys->p_context->debug_mv )
343 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
344 * so we need to do another check in ffmpeg_GetFrameBuf() */
345 p_sys->b_direct_rendering = 1;
349 p_sys->b_pp = p_sys->b_pp_async = p_sys->b_pp_init = VLC_FALSE;
350 p_sys->p_pp = E_(OpenPostproc)( p_dec, &p_sys->b_pp_async );
352 /* ffmpeg doesn't properly release old pictures when frames are skipped */
353 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
354 if( p_sys->b_direct_rendering )
356 msg_Dbg( p_dec, "using direct rendering" );
357 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
360 /* Always use our get_buffer wrapper so we can calculate the
362 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
363 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
364 p_sys->p_context->opaque = p_dec;
366 /* ***** init this codec with special data ***** */
367 ffmpeg_InitCodec( p_dec );
369 /* ***** misc init ***** */
370 p_sys->input_pts = p_sys->input_dts = 0;
372 p_sys->b_has_b_frames = VLC_FALSE;
373 p_sys->b_first_frame = VLC_TRUE;
374 p_sys->i_late_frames = 0;
376 p_sys->i_buffer_orig = 1;
377 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
379 /* Set output properties */
380 p_dec->fmt_out.i_cat = VIDEO_ES;
381 p_dec->fmt_out.i_codec = ffmpeg_PixFmtToChroma( p_context->pix_fmt );
384 if( p_dec->fmt_in.video.p_palette )
385 p_sys->p_context->palctrl =
386 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
388 p_sys->p_context->palctrl = &palette_control;
390 /* ***** Open the codec ***** */
391 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
398 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
400 vlc_mutex_unlock( lock );
401 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
405 vlc_mutex_unlock( lock );
406 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
412 /*****************************************************************************
413 * DecodeVideo: Called to decode one or more frames
414 *****************************************************************************/
415 picture_t *E_(DecodeVideo)( decoder_t *p_dec, block_t **pp_block )
417 decoder_sys_t *p_sys = p_dec->p_sys;
419 int b_null_size = VLC_FALSE;
422 if( !pp_block || !*pp_block ) return NULL;
424 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
425 ffmpeg_InitCodec( p_dec );
429 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
432 p_sys->i_pts = 0; /* To make sure we recover properly */
434 p_sys->input_pts = p_sys->input_dts = 0;
435 p_sys->i_late_frames = 0;
437 block_Release( p_block );
439 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
440 //avcodec_flush_buffers( p_sys->p_context );
444 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
446 /* Do not care about late frames when prerolling
447 * TODO avoid decoding of non reference frame
448 * (ie all B except for H264 where it depends only on nal_ref_idc) */
449 p_sys->i_late_frames = 0;
452 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
453 (mdate() - p_sys->i_late_frames_start > I64C(5000000)) )
457 msg_Err( p_dec, "more than 5 seconds of late video -> "
458 "dropping frame (computer too slow ?)" );
459 p_sys->i_pts = 0; /* To make sure we recover properly */
461 block_Release( p_block );
462 p_sys->i_late_frames--;
466 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
468 p_sys->input_pts = p_block->i_pts;
469 p_sys->input_dts = p_block->i_dts;
471 /* Make sure we don't reuse the same timestamps twice */
472 p_block->i_pts = p_block->i_dts = 0;
475 /* A good idea could be to decode all I pictures and see for the other */
476 if( !p_dec->b_pace_control &&
478 (p_sys->i_late_frames > 4) )
481 if( p_sys->i_late_frames < 8 )
483 p_sys->p_context->skip_frame =
484 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
485 AVDISCARD_BIDIR : p_sys->i_skip_frame;
489 /* picture too late, won't decode
490 * but break picture until a new I, and for mpeg4 ...*/
491 p_sys->i_late_frames--; /* needed else it will never be decrease */
492 block_Release( p_block );
499 if( p_sys->b_hurry_up )
500 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
501 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
507 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
509 if( p_sys->b_hurry_up )
510 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
511 b_null_size = VLC_TRUE;
515 * Do the actual decoding now
518 /* Check if post-processing was enabled */
519 p_sys->b_pp = p_sys->b_pp_async;
521 /* Don't forget that ffmpeg requires a little more bytes
522 * that the real frame size */
523 if( p_block->i_buffer > 0 )
525 p_sys->i_buffer = p_block->i_buffer;
526 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
527 p_sys->i_buffer_orig )
529 free( p_sys->p_buffer_orig );
530 p_sys->i_buffer_orig =
531 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
532 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
534 p_sys->p_buffer = p_sys->p_buffer_orig;
535 p_sys->i_buffer = p_block->i_buffer;
536 p_dec->p_libvlc->pf_memcpy( p_sys->p_buffer, p_block->p_buffer,
538 memset( p_sys->p_buffer + p_block->i_buffer, 0,
539 FF_INPUT_BUFFER_PADDING_SIZE );
541 p_block->i_buffer = 0;
544 while( p_sys->i_buffer > 0 )
546 int i_used, b_gotpicture;
549 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
551 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
552 if( b_null_size && p_sys->p_context->width > 0 &&
553 p_sys->p_context->height > 0 )
555 /* Reparse it to not drop the I frame */
556 b_null_size = VLC_FALSE;
557 if( p_sys->b_hurry_up )
558 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
559 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
561 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
566 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
568 block_Release( p_block );
571 else if( i_used > p_sys->i_buffer )
573 i_used = p_sys->i_buffer;
577 p_sys->i_buffer -= i_used;
578 p_sys->p_buffer += i_used;
580 /* Nothing to display */
583 if( i_used == 0 ) break;
587 /* Update frame late count (except when doing preroll) */
588 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
589 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
591 p_sys->i_late_frames++;
592 if( p_sys->i_late_frames == 1 )
593 p_sys->i_late_frames_start = mdate();
597 p_sys->i_late_frames = 0;
600 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
602 /* Do not display the picture */
603 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
604 if( !b_drawpicture && p_pic )
605 p_dec->pf_vout_buffer_del( p_dec, p_pic );
609 if( !p_sys->p_ff_pic->opaque )
611 /* Get a new picture */
612 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
615 block_Release( p_block );
619 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
621 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
625 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
629 if( p_sys->p_ff_pic->pts ) p_sys->i_pts = p_sys->p_ff_pic->pts;
631 /* Sanity check (seems to be needed for some streams) */
632 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
634 p_sys->b_has_b_frames = VLC_TRUE;
637 if( !p_dec->fmt_in.video.i_aspect )
639 /* Fetch again the aspect ratio in case it changed */
640 p_dec->fmt_out.video.i_aspect =
642 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
643 * p_sys->p_context->width / p_sys->p_context->height );
644 p_dec->fmt_out.video.i_sar_num
645 = p_sys->p_context->sample_aspect_ratio.num;
646 p_dec->fmt_out.video.i_sar_den
647 = p_sys->p_context->sample_aspect_ratio.den;
649 if( p_dec->fmt_out.video.i_aspect == 0 )
651 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
652 * p_sys->p_context->width / p_sys->p_context->height;
656 /* Send decoded frame to vout */
659 p_pic->date = p_sys->i_pts;
661 /* interpolate the next PTS */
662 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
663 p_dec->fmt_in.video.i_frame_rate_base > 0 )
665 p_sys->i_pts += I64C(1000000) *
666 (2 + p_sys->p_ff_pic->repeat_pict) *
667 p_dec->fmt_in.video.i_frame_rate_base *
668 p_block->i_rate / INPUT_RATE_DEFAULT /
669 (2 * p_dec->fmt_in.video.i_frame_rate);
671 else if( p_sys->p_context->time_base.den > 0 )
673 p_sys->i_pts += I64C(1000000) *
674 (2 + p_sys->p_ff_pic->repeat_pict) *
675 p_sys->p_context->time_base.num *
676 p_block->i_rate / INPUT_RATE_DEFAULT /
677 (2 * p_sys->p_context->time_base.den);
680 if( p_sys->b_first_frame )
682 /* Hack to force display of still pictures */
683 p_sys->b_first_frame = VLC_FALSE;
684 p_pic->b_force = VLC_TRUE;
687 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
688 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
689 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
695 p_dec->pf_vout_buffer_del( p_dec, p_pic );
699 block_Release( p_block );
703 /*****************************************************************************
704 * EndVideo: decoder destruction
705 *****************************************************************************
706 * This function is called when the thread ends after a successful
708 *****************************************************************************/
709 void E_(EndVideoDec)( decoder_t *p_dec )
711 decoder_sys_t *p_sys = p_dec->p_sys;
713 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
714 E_(ClosePostproc)( p_dec, p_sys->p_pp );
715 free( p_sys->p_buffer_orig );
718 /*****************************************************************************
719 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
720 *****************************************************************************/
721 static void ffmpeg_InitCodec( decoder_t *p_dec )
723 decoder_sys_t *p_sys = p_dec->p_sys;
724 int i_size = p_dec->fmt_in.i_extra;
726 if( !i_size ) return;
728 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
732 p_sys->p_context->extradata_size = i_size + 12;
733 p = p_sys->p_context->extradata =
734 malloc( p_sys->p_context->extradata_size );
736 memcpy( &p[0], "SVQ3", 4 );
737 memset( &p[4], 0, 8 );
738 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
740 /* Now remove all atoms before the SMI one */
741 if( p_sys->p_context->extradata_size > 0x5a &&
742 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
744 uint8_t *psz = &p[0x52];
746 while( psz < &p[p_sys->p_context->extradata_size - 8] )
748 int i_size = GetDWBE( psz );
751 /* FIXME handle 1 as long size */
754 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
756 memmove( &p[0x52], psz,
757 &p[p_sys->p_context->extradata_size] - psz );
765 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
766 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
767 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
769 if( p_dec->fmt_in.i_extra == 8 )
771 p_sys->p_context->extradata_size = 8;
772 p_sys->p_context->extradata = malloc( 8 );
774 memcpy( p_sys->p_context->extradata,
775 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
776 p_sys->p_context->sub_id= ((uint32_t*)p_dec->fmt_in.p_extra)[1];
778 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
779 p_sys->p_context->sub_id );
784 p_sys->p_context->extradata_size = i_size;
785 p_sys->p_context->extradata =
786 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
787 memcpy( p_sys->p_context->extradata,
788 p_dec->fmt_in.p_extra, i_size );
789 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
790 0, FF_INPUT_BUFFER_PADDING_SIZE );
794 /*****************************************************************************
795 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
796 * picture_t structure (when not in direct rendering mode).
797 *****************************************************************************/
798 static void ffmpeg_CopyPicture( decoder_t *p_dec,
799 picture_t *p_pic, AVFrame *p_ff_pic )
801 decoder_sys_t *p_sys = p_dec->p_sys;
803 if( ffmpeg_PixFmtToChroma( p_sys->p_context->pix_fmt ) )
805 int i_plane, i_size, i_line;
806 uint8_t *p_dst, *p_src;
807 int i_src_stride, i_dst_stride;
809 if( p_sys->p_pp && p_sys->b_pp )
810 E_(PostprocPict)( p_sys->p_pp, p_pic, p_ff_pic );
813 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
815 p_src = p_ff_pic->data[i_plane];
816 p_dst = p_pic->p[i_plane].p_pixels;
817 i_src_stride = p_ff_pic->linesize[i_plane];
818 i_dst_stride = p_pic->p[i_plane].i_pitch;
820 i_size = __MIN( i_src_stride, i_dst_stride );
821 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
824 p_dec->p_libvlc->pf_memcpy( p_dst, p_src, i_size );
825 p_src += i_src_stride;
826 p_dst += i_dst_stride;
836 /* we need to convert to I420 */
837 switch( p_sys->p_context->pix_fmt )
839 case PIX_FMT_YUV410P:
840 case PIX_FMT_YUV411P:
843 for( i = 0; i < p_pic->i_planes; i++ )
845 dest_pic.data[i] = p_pic->p[i].p_pixels;
846 dest_pic.linesize[i] = p_pic->p[i].i_pitch;
848 #if !defined(HAVE_LIBSWSCALE_SWSCALE_H) && !defined(HAVE_FFMPEG_SWSCALE_H) && !defined(HAVE_LIBSWSCALE_TREE)
849 img_convert( &dest_pic, PIX_FMT_YUV420P,
850 (AVPicture *)p_ff_pic,
851 p_sys->p_context->pix_fmt,
852 p_sys->p_context->width,
853 p_sys->p_context->height );
857 msg_Err( p_dec, "don't know how to convert chroma %i",
858 p_sys->p_context->pix_fmt );
865 /*****************************************************************************
866 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
867 *****************************************************************************
868 * It is used for direct rendering as well as to get the right PTS for each
869 * decoded picture (even in indirect rendering mode).
870 *****************************************************************************/
871 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
874 decoder_t *p_dec = (decoder_t *)p_context->opaque;
875 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_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;
901 p_ff_pic->opaque = 0;
903 /* Not much to do in indirect rendering mode */
904 if( !p_sys->b_direct_rendering || p_sys->b_pp )
906 return avcodec_default_get_buffer( p_context, p_ff_pic );
909 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
910 * so this check is necessary. */
911 if( !ffmpeg_PixFmtToChroma( p_context->pix_fmt ) ||
912 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 )
914 msg_Dbg( p_dec, "disabling direct rendering" );
915 p_sys->b_direct_rendering = 0;
916 return avcodec_default_get_buffer( p_context, p_ff_pic );
919 /* Get a new picture */
920 //p_sys->p_vout->render.b_allow_modify_pics = 0;
921 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
924 p_sys->b_direct_rendering = 0;
925 return avcodec_default_get_buffer( p_context, p_ff_pic );
927 p_sys->p_context->draw_horiz_band = NULL;
929 p_ff_pic->opaque = (void*)p_pic;
930 p_ff_pic->type = FF_BUFFER_TYPE_USER;
931 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
932 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
933 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
934 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
936 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
937 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
938 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
939 p_ff_pic->linesize[3] = 0;
941 if( p_ff_pic->reference != 0 ||
942 p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
944 p_dec->pf_picture_link( p_dec, p_pic );
947 /* FIXME what is that, should give good value */
948 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
953 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
956 decoder_t *p_dec = (decoder_t *)p_context->opaque;
959 if( !p_ff_pic->opaque )
961 avcodec_default_release_buffer( p_context, p_ff_pic );
965 p_pic = (picture_t*)p_ff_pic->opaque;
967 p_ff_pic->data[0] = NULL;
968 p_ff_pic->data[1] = NULL;
969 p_ff_pic->data[2] = NULL;
970 p_ff_pic->data[3] = NULL;
972 if( p_ff_pic->reference != 0 ||
973 p_dec->p_sys->i_codec_id == CODEC_ID_H264 /* Bug in libavcodec */ )
975 p_dec->pf_picture_unlink( p_dec, p_pic );