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;
90 /* FIXME (dummy palette for now) */
91 static const 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 int ffmpeg_ReGetFrameBuf( struct AVCodecContext *, AVFrame * );
100 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *, AVFrame * );
101 static void ffmpeg_NextPts( decoder_t *, int i_block_rate );
103 static uint32_t ffmpeg_CodecTag( vlc_fourcc_t fcc )
105 uint8_t *p = (uint8_t*)&fcc;
106 return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
109 /*****************************************************************************
111 *****************************************************************************/
113 /* Returns a new picture buffer */
114 static inline picture_t *ffmpeg_NewPictBuf( decoder_t *p_dec,
115 AVCodecContext *p_context )
119 p_dec->fmt_out.video.i_width = p_context->width;
120 p_dec->fmt_out.video.i_height = p_context->height;
122 if( !p_context->width || !p_context->height )
124 return NULL; /* invalid display size */
127 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
129 /* we are doomed, but not really, because most codecs set their pix_fmt much later */
130 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
132 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
134 /* If an aspect-ratio was specified in the input format then force it */
135 if( p_dec->fmt_in.video.i_aspect )
137 p_dec->fmt_out.video.i_aspect = p_dec->fmt_in.video.i_aspect;
141 p_dec->fmt_out.video.i_aspect =
142 VOUT_ASPECT_FACTOR * ( av_q2d(p_context->sample_aspect_ratio) *
143 p_context->width / p_context->height );
144 p_dec->fmt_out.video.i_sar_num = p_context->sample_aspect_ratio.num;
145 p_dec->fmt_out.video.i_sar_den = p_context->sample_aspect_ratio.den;
147 if( p_dec->fmt_out.video.i_aspect == 0 )
149 p_dec->fmt_out.video.i_aspect =
150 VOUT_ASPECT_FACTOR * p_context->width / p_context->height;
154 if( p_dec->fmt_out.video.i_frame_rate > 0 &&
155 p_dec->fmt_out.video.i_frame_rate_base > 0 )
157 p_dec->fmt_out.video.i_frame_rate =
158 p_dec->fmt_in.video.i_frame_rate;
159 p_dec->fmt_out.video.i_frame_rate_base =
160 p_dec->fmt_in.video.i_frame_rate_base;
162 else if( p_context->time_base.num > 0 && p_context->time_base.den > 0 )
164 p_dec->fmt_out.video.i_frame_rate = p_context->time_base.den;
165 p_dec->fmt_out.video.i_frame_rate_base = p_context->time_base.num;
168 p_pic = p_dec->pf_vout_buffer_new( p_dec );
173 /*****************************************************************************
174 * InitVideo: initialize the video decoder
175 *****************************************************************************
176 * the ffmpeg codec will be opened, some memory allocated. The vout is not yet
177 * opened (done after the first decoded frame).
178 *****************************************************************************/
179 int InitVideoDec( decoder_t *p_dec, AVCodecContext *p_context,
180 AVCodec *p_codec, int i_codec_id, const char *psz_namecodec )
182 decoder_sys_t *p_sys;
185 /* Allocate the memory needed to store the decoder's structure */
186 if( ( p_dec->p_sys = p_sys =
187 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
191 memset( p_sys, 0, sizeof(decoder_sys_t) );
193 p_dec->p_sys->p_context = p_context;
194 p_dec->p_sys->p_codec = p_codec;
195 p_dec->p_sys->i_codec_id = i_codec_id;
196 p_dec->p_sys->psz_namecodec = psz_namecodec;
197 p_sys->p_ff_pic = avcodec_alloc_frame();
199 /* ***** Fill p_context with init values ***** */
200 p_sys->p_context->codec_tag = ffmpeg_CodecTag( p_dec->fmt_in.i_codec );
201 p_sys->p_context->width = p_dec->fmt_in.video.i_width;
202 p_sys->p_context->height = p_dec->fmt_in.video.i_height;
203 p_sys->p_context->bits_per_sample = p_dec->fmt_in.video.i_bits_per_pixel;
205 /* ***** Get configuration of ffmpeg plugin ***** */
206 p_sys->p_context->workaround_bugs =
207 config_GetInt( p_dec, "ffmpeg-workaround-bugs" );
208 p_sys->p_context->error_resilience =
209 config_GetInt( p_dec, "ffmpeg-error-resilience" );
211 var_Create( p_dec, "grayscale", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
212 var_Get( p_dec, "grayscale", &val );
213 if( val.b_bool ) p_sys->p_context->flags |= CODEC_FLAG_GRAY;
215 var_Create( p_dec, "ffmpeg-vismv", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
216 var_Get( p_dec, "ffmpeg-vismv", &val );
217 if( val.i_int ) p_sys->p_context->debug_mv = val.i_int;
219 var_Create( p_dec, "ffmpeg-lowres", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
220 var_Get( p_dec, "ffmpeg-lowres", &val );
221 if( val.i_int > 0 && val.i_int <= 2 ) p_sys->p_context->lowres = val.i_int;
223 var_Create( p_dec, "ffmpeg-skiploopfilter",
224 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
225 var_Get( p_dec, "ffmpeg-skiploopfilter", &val );
226 if( val.i_int > 0 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONREF;
227 if( val.i_int > 1 ) p_sys->p_context->skip_loop_filter = AVDISCARD_BIDIR;
228 if( val.i_int > 2 ) p_sys->p_context->skip_loop_filter = AVDISCARD_NONKEY;
229 if( val.i_int > 3 ) p_sys->p_context->skip_loop_filter = AVDISCARD_ALL;
231 /* ***** ffmpeg frame skipping ***** */
232 var_Create( p_dec, "ffmpeg-hurry-up", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
233 var_Get( p_dec, "ffmpeg-hurry-up", &val );
234 p_sys->b_hurry_up = val.b_bool;
236 var_Create( p_dec, "ffmpeg-skip-frame", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
237 var_Get( p_dec, "ffmpeg-skip-frame", &val );
241 p_sys->p_context->skip_frame = AVDISCARD_NONE;
244 p_sys->p_context->skip_frame = AVDISCARD_DEFAULT;
247 p_sys->p_context->skip_frame = AVDISCARD_BIDIR;
250 p_sys->p_context->skip_frame = AVDISCARD_NONKEY;
253 p_sys->p_context->skip_frame = AVDISCARD_ALL;
256 p_sys->p_context->skip_frame = AVDISCARD_NONE;
259 p_sys->i_skip_frame = p_sys->p_context->skip_frame;
261 var_Create( p_dec, "ffmpeg-skip-idct", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
262 var_Get( p_dec, "ffmpeg-skip-idct", &val );
266 p_sys->p_context->skip_idct = AVDISCARD_NONE;
269 p_sys->p_context->skip_idct = AVDISCARD_DEFAULT;
272 p_sys->p_context->skip_idct = AVDISCARD_BIDIR;
275 p_sys->p_context->skip_idct = AVDISCARD_NONKEY;
278 p_sys->p_context->skip_idct = AVDISCARD_ALL;
281 p_sys->p_context->skip_idct = AVDISCARD_NONE;
284 p_sys->i_skip_idct = p_sys->p_context->skip_idct;
286 /* ***** ffmpeg direct rendering ***** */
287 p_sys->b_direct_rendering = 0;
288 var_Create( p_dec, "ffmpeg-dr", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
289 var_Get( p_dec, "ffmpeg-dr", &val );
290 if( val.b_bool && (p_sys->p_codec->capabilities & CODEC_CAP_DR1) &&
291 /* Apparently direct rendering doesn't work with YUV422P */
292 p_sys->p_context->pix_fmt != PIX_FMT_YUV422P &&
293 /* H264 uses too many reference frames */
294 p_sys->i_codec_id != CODEC_ID_H264 &&
295 !p_sys->p_context->debug_mv )
297 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
298 * so we need to do another check in ffmpeg_GetFrameBuf() */
299 p_sys->b_direct_rendering = 1;
302 /* ffmpeg doesn't properly release old pictures when frames are skipped */
303 //if( p_sys->b_hurry_up ) p_sys->b_direct_rendering = 0;
304 if( p_sys->b_direct_rendering )
306 msg_Dbg( p_dec, "using direct rendering" );
307 p_sys->p_context->flags |= CODEC_FLAG_EMU_EDGE;
310 /* Always use our get_buffer wrapper so we can calculate the
312 p_sys->p_context->get_buffer = ffmpeg_GetFrameBuf;
313 p_sys->p_context->reget_buffer = ffmpeg_ReGetFrameBuf;
314 p_sys->p_context->release_buffer = ffmpeg_ReleaseFrameBuf;
315 p_sys->p_context->opaque = p_dec;
317 /* ***** init this codec with special data ***** */
318 ffmpeg_InitCodec( p_dec );
320 /* ***** misc init ***** */
321 p_sys->input_pts = p_sys->input_dts = 0;
323 p_sys->b_has_b_frames = false;
324 p_sys->b_first_frame = true;
325 p_sys->b_flush = false;
326 p_sys->i_late_frames = 0;
328 p_sys->i_buffer_orig = 1;
329 p_sys->p_buffer_orig = p_sys->p_buffer = malloc( p_sys->i_buffer_orig );
330 if( !p_sys->p_buffer_orig )
336 /* Set output properties */
337 p_dec->fmt_out.i_cat = VIDEO_ES;
338 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS )
340 /* we are doomed. but not really, because most codecs set their pix_fmt later on */
341 p_dec->fmt_out.i_codec = VLC_FOURCC('I','4','2','0');
343 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
346 if( p_dec->fmt_in.video.p_palette )
347 p_sys->p_context->palctrl =
348 (AVPaletteControl *)p_dec->fmt_in.video.p_palette;
349 else if( p_sys->i_codec_id != CODEC_ID_MSVIDEO1 && p_sys->i_codec_id != CODEC_ID_CINEPAK )
350 p_sys->p_context->palctrl = (AVPaletteControl *) &palette_control;
352 /* ***** Open the codec ***** */
353 vlc_mutex_t *lock = var_AcquireMutex( "avcodec" );
356 free( p_sys->p_buffer_orig );
361 if( avcodec_open( p_sys->p_context, p_sys->p_codec ) < 0 )
363 vlc_mutex_unlock( lock );
364 msg_Err( p_dec, "cannot open codec (%s)", p_sys->psz_namecodec );
365 free( p_sys->p_buffer_orig );
369 vlc_mutex_unlock( lock );
370 msg_Dbg( p_dec, "ffmpeg codec (%s) started", p_sys->psz_namecodec );
376 /*****************************************************************************
377 * DecodeVideo: Called to decode one or more frames
378 *****************************************************************************/
379 picture_t *DecodeVideo( decoder_t *p_dec, block_t **pp_block )
381 decoder_sys_t *p_sys = p_dec->p_sys;
383 int b_null_size = false;
386 if( !pp_block || !*pp_block ) return NULL;
388 if( !p_sys->p_context->extradata_size && p_dec->fmt_in.i_extra )
389 ffmpeg_InitCodec( p_dec );
393 if( p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED) )
396 p_sys->i_pts = 0; /* To make sure we recover properly */
398 p_sys->input_pts = p_sys->input_dts = 0;
399 p_sys->i_late_frames = 0;
401 block_Release( p_block );
403 //if( p_block->i_flags & BLOCK_FLAG_CORRUPTED )
404 //avcodec_flush_buffers( p_sys->p_context );
408 if( p_block->i_flags & BLOCK_FLAG_PREROLL )
410 /* Do not care about late frames when prerolling
411 * TODO avoid decoding of non reference frame
412 * (ie all B except for H264 where it depends only on nal_ref_idc) */
413 p_sys->i_late_frames = 0;
416 if( !p_dec->b_pace_control && (p_sys->i_late_frames > 0) &&
417 (mdate() - p_sys->i_late_frames_start > INT64_C(5000000)) )
421 msg_Err( p_dec, "more than 5 seconds of late video -> "
422 "dropping frame (computer too slow ?)" );
423 p_sys->i_pts = 0; /* To make sure we recover properly */
425 block_Release( p_block );
426 p_sys->i_late_frames--;
430 if( p_block->i_pts > 0 || p_block->i_dts > 0 )
432 p_sys->input_pts = p_block->i_pts;
433 p_sys->input_dts = p_block->i_dts;
435 /* Make sure we don't reuse the same timestamps twice */
436 p_block->i_pts = p_block->i_dts = 0;
439 /* A good idea could be to decode all I pictures and see for the other */
440 if( !p_dec->b_pace_control &&
442 (p_sys->i_late_frames > 4) )
445 if( p_sys->i_late_frames < 12 )
447 p_sys->p_context->skip_frame =
448 (p_sys->i_skip_frame <= AVDISCARD_BIDIR) ?
449 AVDISCARD_BIDIR : p_sys->i_skip_frame;
453 /* picture too late, won't decode
454 * but break picture until a new I, and for mpeg4 ...*/
455 p_sys->i_late_frames--; /* needed else it will never be decrease */
456 block_Release( p_block );
463 if( p_sys->b_hurry_up )
464 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
465 if( !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
471 if( p_sys->p_context->width <= 0 || p_sys->p_context->height <= 0 )
473 if( p_sys->b_hurry_up )
474 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
479 * Do the actual decoding now
482 /* Don't forget that ffmpeg requires a little more bytes
483 * that the real frame size */
484 if( p_block->i_buffer > 0 )
486 p_sys->b_flush = ( p_block->i_flags & BLOCK_FLAG_END_OF_SEQUENCE ) != 0;
488 p_sys->i_buffer = p_block->i_buffer;
489 if( p_sys->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE >
490 p_sys->i_buffer_orig )
492 free( p_sys->p_buffer_orig );
493 p_sys->i_buffer_orig =
494 p_block->i_buffer + FF_INPUT_BUFFER_PADDING_SIZE;
495 p_sys->p_buffer_orig = malloc( p_sys->i_buffer_orig );
497 p_sys->p_buffer = p_sys->p_buffer_orig;
498 p_sys->i_buffer = p_block->i_buffer;
499 if( !p_sys->p_buffer )
501 block_Release( p_block );
504 vlc_memcpy( p_sys->p_buffer, p_block->p_buffer, p_block->i_buffer );
505 memset( p_sys->p_buffer + p_block->i_buffer, 0,
506 FF_INPUT_BUFFER_PADDING_SIZE );
508 p_block->i_buffer = 0;
511 while( p_sys->i_buffer > 0 || p_sys->b_flush )
513 int i_used, b_gotpicture;
516 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
518 p_sys->i_buffer <= 0 && p_sys->b_flush ? NULL : (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
520 if( b_null_size && p_sys->p_context->width > 0 &&
521 p_sys->p_context->height > 0 &&
524 /* Reparse it to not drop the I frame */
526 if( p_sys->b_hurry_up )
527 p_sys->p_context->skip_frame = p_sys->i_skip_frame;
528 i_used = avcodec_decode_video( p_sys->p_context, p_sys->p_ff_pic,
530 (uint8_t*)p_sys->p_buffer, p_sys->i_buffer );
534 p_sys->b_first_frame = true;
536 if( p_sys->i_buffer <= 0 )
537 p_sys->b_flush = false;
541 msg_Warn( p_dec, "cannot decode one frame (%d bytes)",
543 block_Release( p_block );
546 else if( i_used > p_sys->i_buffer )
548 i_used = p_sys->i_buffer;
552 p_sys->i_buffer -= i_used;
553 p_sys->p_buffer += i_used;
555 /* Nothing to display */
558 if( i_used == 0 ) break;
563 if( p_sys->p_ff_pic->pts )
564 p_sys->i_pts = p_sys->p_ff_pic->pts;
566 /* Update frame late count (except when doing preroll) */
567 if( p_sys->i_pts && decoder_GetDisplayDate(p_dec, p_sys->i_pts) <= mdate() &&
568 !(p_block->i_flags & BLOCK_FLAG_PREROLL) )
570 p_sys->i_late_frames++;
571 if( p_sys->i_late_frames == 1 )
572 p_sys->i_late_frames_start = mdate();
576 p_sys->i_late_frames = 0;
579 if( !b_drawpicture || !p_sys->p_ff_pic->linesize[0] )
581 /* Do not display the picture */
582 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
583 if( !b_drawpicture && p_pic )
584 p_dec->pf_vout_buffer_del( p_dec, p_pic );
586 ffmpeg_NextPts( p_dec, p_block->i_rate );
590 if( !p_sys->p_ff_pic->opaque )
592 /* Get a new picture */
593 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
596 block_Release( p_block );
600 /* Fill p_picture_t from AVVideoFrame and do chroma conversion
602 ffmpeg_CopyPicture( p_dec, p_pic, p_sys->p_ff_pic );
606 p_pic = (picture_t *)p_sys->p_ff_pic->opaque;
609 /* Sanity check (seems to be needed for some streams) */
610 if( p_sys->p_ff_pic->pict_type == FF_B_TYPE )
612 p_sys->b_has_b_frames = true;
615 if( !p_dec->fmt_in.video.i_aspect )
617 /* Fetch again the aspect ratio in case it changed */
618 p_dec->fmt_out.video.i_aspect =
620 * ( av_q2d(p_sys->p_context->sample_aspect_ratio)
621 * p_sys->p_context->width / p_sys->p_context->height );
622 p_dec->fmt_out.video.i_sar_num
623 = p_sys->p_context->sample_aspect_ratio.num;
624 p_dec->fmt_out.video.i_sar_den
625 = p_sys->p_context->sample_aspect_ratio.den;
627 if( p_dec->fmt_out.video.i_aspect == 0 )
629 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR
630 * p_sys->p_context->width / p_sys->p_context->height;
634 /* Send decoded frame to vout */
638 p_pic->date = p_sys->i_pts;
640 ffmpeg_NextPts( p_dec, p_block->i_rate );
642 if( p_sys->b_first_frame )
644 /* Hack to force display of still pictures */
645 p_sys->b_first_frame = false;
646 p_pic->b_force = true;
649 p_pic->i_nb_fields = 2 + p_sys->p_ff_pic->repeat_pict;
650 p_pic->b_progressive = !p_sys->p_ff_pic->interlaced_frame;
651 p_pic->b_top_field_first = p_sys->p_ff_pic->top_field_first;
653 p_pic->i_qstride = p_sys->p_ff_pic->qstride;
655 p_pic->p_q = p_sys->p_ff_pic->qscale_table; /* XXX: is this dangerous? shouldn't be since the ff pics are never freed ... but you never know */
657 /* FIXME: this leaks p_q */
658 int i_mb_h = ( p_pic->format.i_height + 15 ) / 16;
659 p_pic->p_q = malloc( p_pic->i_qstride * i_mb_h );
660 memcpy( p_pic->p_q, p_sys->p_ff_pic->qscale_table,
661 p_pic->i_qstride * i_mb_h );
663 switch( p_sys->p_ff_pic->qscale_type )
665 case FF_QSCALE_TYPE_MPEG1:
666 p_pic->i_qtype = QTYPE_MPEG1;
668 case FF_QSCALE_TYPE_MPEG2:
669 p_pic->i_qtype = QTYPE_MPEG2;
671 case FF_QSCALE_TYPE_H264:
672 p_pic->i_qtype = QTYPE_H264;
680 p_dec->pf_vout_buffer_del( p_dec, p_pic );
684 block_Release( p_block );
688 /*****************************************************************************
689 * EndVideo: decoder destruction
690 *****************************************************************************
691 * This function is called when the thread ends after a successful
693 *****************************************************************************/
694 void EndVideoDec( decoder_t *p_dec )
696 decoder_sys_t *p_sys = p_dec->p_sys;
698 if( p_sys->p_ff_pic ) av_free( p_sys->p_ff_pic );
699 free( p_sys->p_buffer_orig );
702 /*****************************************************************************
703 * ffmpeg_InitCodec: setup codec extra initialization data for ffmpeg
704 *****************************************************************************/
705 static void ffmpeg_InitCodec( decoder_t *p_dec )
707 decoder_sys_t *p_sys = p_dec->p_sys;
708 int i_size = p_dec->fmt_in.i_extra;
710 if( !i_size ) return;
712 if( p_sys->i_codec_id == CODEC_ID_SVQ3 )
716 p_sys->p_context->extradata_size = i_size + 12;
717 p = p_sys->p_context->extradata =
718 malloc( p_sys->p_context->extradata_size );
722 memcpy( &p[0], "SVQ3", 4 );
723 memset( &p[4], 0, 8 );
724 memcpy( &p[12], p_dec->fmt_in.p_extra, i_size );
726 /* Now remove all atoms before the SMI one */
727 if( p_sys->p_context->extradata_size > 0x5a &&
728 strncmp( (char*)&p[0x56], "SMI ", 4 ) )
730 uint8_t *psz = &p[0x52];
732 while( psz < &p[p_sys->p_context->extradata_size - 8] )
734 int i_size = GetDWBE( psz );
737 /* FIXME handle 1 as long size */
740 if( !strncmp( (char*)&psz[4], "SMI ", 4 ) )
742 memmove( &p[0x52], psz,
743 &p[p_sys->p_context->extradata_size] - psz );
751 else if( p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '0' ) ||
752 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '1', '3' ) ||
753 p_dec->fmt_in.i_codec == VLC_FOURCC( 'R', 'V', '2', '0' ) )
755 if( p_dec->fmt_in.i_extra == 8 )
757 p_sys->p_context->extradata_size = 8;
758 p_sys->p_context->extradata = malloc( 8 );
759 if( p_sys->p_context->extradata )
761 memcpy( p_sys->p_context->extradata,
762 p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra );
763 p_sys->p_context->sub_id = ((uint32_t*)p_dec->fmt_in.p_extra)[1];
765 msg_Warn( p_dec, "using extra data for RV codec sub_id=%08x",
766 p_sys->p_context->sub_id );
772 p_sys->p_context->extradata_size = i_size;
773 p_sys->p_context->extradata =
774 malloc( i_size + FF_INPUT_BUFFER_PADDING_SIZE );
775 if( p_sys->p_context->extradata )
777 memcpy( p_sys->p_context->extradata,
778 p_dec->fmt_in.p_extra, i_size );
779 memset( &((uint8_t*)p_sys->p_context->extradata)[i_size],
780 0, FF_INPUT_BUFFER_PADDING_SIZE );
785 /*****************************************************************************
786 * ffmpeg_CopyPicture: copy a picture from ffmpeg internal buffers to a
787 * picture_t structure (when not in direct rendering mode).
788 *****************************************************************************/
789 static void ffmpeg_CopyPicture( decoder_t *p_dec,
790 picture_t *p_pic, AVFrame *p_ff_pic )
792 decoder_sys_t *p_sys = p_dec->p_sys;
794 if( TestFfmpegChroma( p_sys->p_context->pix_fmt, -1 ) == VLC_SUCCESS )
796 int i_plane, i_size, i_line;
797 uint8_t *p_dst, *p_src;
798 int i_src_stride, i_dst_stride;
800 for( i_plane = 0; i_plane < p_pic->i_planes; i_plane++ )
802 p_src = p_ff_pic->data[i_plane];
803 p_dst = p_pic->p[i_plane].p_pixels;
804 i_src_stride = p_ff_pic->linesize[i_plane];
805 i_dst_stride = p_pic->p[i_plane].i_pitch;
807 i_size = __MIN( i_src_stride, i_dst_stride );
808 for( i_line = 0; i_line < p_pic->p[i_plane].i_visible_lines;
811 vlc_memcpy( p_dst, p_src, i_size );
812 p_src += i_src_stride;
813 p_dst += i_dst_stride;
819 msg_Err( p_dec, "don't know how to convert chroma %i",
820 p_sys->p_context->pix_fmt );
825 /*****************************************************************************
826 * ffmpeg_GetFrameBuf: callback used by ffmpeg to get a frame buffer.
827 *****************************************************************************
828 * It is used for direct rendering as well as to get the right PTS for each
829 * decoded picture (even in indirect rendering mode).
830 *****************************************************************************/
831 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic );
833 static int ffmpeg_GetFrameBuf( struct AVCodecContext *p_context,
836 decoder_t *p_dec = (decoder_t *)p_context->opaque;
837 decoder_sys_t *p_sys = p_dec->p_sys;
840 /* Set picture PTS */
841 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
844 p_ff_pic->opaque = 0;
846 /* Not much to do in indirect rendering mode */
847 if( !p_sys->b_direct_rendering )
849 return avcodec_default_get_buffer( p_context, p_ff_pic );
852 /* Some codecs set pix_fmt only after the 1st frame has been decoded,
853 * so we need to check for direct rendering again. */
855 int i_width = p_sys->p_context->width;
856 int i_height = p_sys->p_context->height;
857 avcodec_align_dimensions( p_sys->p_context, &i_width, &i_height );
859 if( GetVlcChroma( &p_dec->fmt_out.video, p_context->pix_fmt ) != VLC_SUCCESS ||
860 p_sys->p_context->width % 16 || p_sys->p_context->height % 16 ||
861 /* We only pad picture up to 16 */
862 PAD(p_sys->p_context->width,16) < i_width || PAD(p_sys->p_context->height,16) < i_height )
864 msg_Dbg( p_dec, "disabling direct rendering" );
865 p_sys->b_direct_rendering = 0;
866 return avcodec_default_get_buffer( p_context, p_ff_pic );
868 p_dec->fmt_out.i_codec = p_dec->fmt_out.video.i_chroma;
870 /* Get a new picture */
871 //p_sys->p_vout->render.b_allow_modify_pics = 0;
872 p_pic = ffmpeg_NewPictBuf( p_dec, p_sys->p_context );
875 p_sys->b_direct_rendering = 0;
876 return avcodec_default_get_buffer( p_context, p_ff_pic );
878 p_sys->p_context->draw_horiz_band = NULL;
880 p_ff_pic->opaque = (void*)p_pic;
881 p_ff_pic->type = FF_BUFFER_TYPE_USER;
882 p_ff_pic->data[0] = p_pic->p[0].p_pixels;
883 p_ff_pic->data[1] = p_pic->p[1].p_pixels;
884 p_ff_pic->data[2] = p_pic->p[2].p_pixels;
885 p_ff_pic->data[3] = NULL; /* alpha channel but I'm not sure */
887 p_ff_pic->linesize[0] = p_pic->p[0].i_pitch;
888 p_ff_pic->linesize[1] = p_pic->p[1].i_pitch;
889 p_ff_pic->linesize[2] = p_pic->p[2].i_pitch;
890 p_ff_pic->linesize[3] = 0;
892 if( p_ff_pic->reference != 0 )
894 p_dec->pf_picture_link( p_dec, p_pic );
897 /* FIXME what is that, should give good value */
898 p_ff_pic->age = 256*256*256*64; // FIXME FIXME from ffmpeg
902 static int ffmpeg_ReGetFrameBuf( struct AVCodecContext *p_context, AVFrame *p_ff_pic )
904 decoder_t *p_dec = (decoder_t *)p_context->opaque;
908 p_ff_pic->pts = AV_NOPTS_VALUE;
910 /* We always use default reget function, it works perfectly fine */
911 i_ret = avcodec_default_reget_buffer( p_context, p_ff_pic );
913 /* Set picture PTS if avcodec_default_reget_buffer didn't set it (through a
914 * ffmpeg_GetFrameBuf call) */
915 if( !i_ret && p_ff_pic->pts == AV_NOPTS_VALUE )
916 ffmpeg_SetFrameBufferPts( p_dec, p_ff_pic );
921 static void ffmpeg_SetFrameBufferPts( decoder_t *p_dec, AVFrame *p_ff_pic )
923 decoder_sys_t *p_sys = p_dec->p_sys;
925 /* Set picture PTS */
926 if( p_sys->input_pts )
928 p_ff_pic->pts = p_sys->input_pts;
930 else if( p_sys->input_dts )
932 /* Some demuxers only set the dts so let's try to find a useful
933 * timestamp from this */
934 if( !p_sys->p_context->has_b_frames || !p_sys->b_has_b_frames ||
935 !p_ff_pic->reference || !p_sys->i_pts )
937 p_ff_pic->pts = p_sys->input_dts;
949 if( p_sys->i_pts ) /* make sure 1st frame has a pts > 0 */
951 p_sys->input_pts = p_sys->input_dts = 0;
955 static void ffmpeg_ReleaseFrameBuf( struct AVCodecContext *p_context,
958 decoder_t *p_dec = (decoder_t *)p_context->opaque;
961 if( !p_ff_pic->opaque )
963 avcodec_default_release_buffer( p_context, p_ff_pic );
967 p_pic = (picture_t*)p_ff_pic->opaque;
969 p_ff_pic->data[0] = NULL;
970 p_ff_pic->data[1] = NULL;
971 p_ff_pic->data[2] = NULL;
972 p_ff_pic->data[3] = NULL;
974 if( p_ff_pic->reference != 0 )
976 p_dec->pf_picture_unlink( p_dec, p_pic );
980 static void ffmpeg_NextPts( decoder_t *p_dec, int i_block_rate )
982 decoder_sys_t *p_sys = p_dec->p_sys;
984 if( p_sys->i_pts <= 0 )
987 /* interpolate the next PTS */
988 if( p_dec->fmt_in.video.i_frame_rate > 0 &&
989 p_dec->fmt_in.video.i_frame_rate_base > 0 )
991 p_sys->i_pts += INT64_C(1000000) *
992 (2 + p_sys->p_ff_pic->repeat_pict) *
993 p_dec->fmt_in.video.i_frame_rate_base *
994 i_block_rate / INPUT_RATE_DEFAULT /
995 (2 * p_dec->fmt_in.video.i_frame_rate);
997 else if( p_sys->p_context->time_base.den > 0 )
999 p_sys->i_pts += INT64_C(1000000) *
1000 (2 + p_sys->p_ff_pic->repeat_pict) *
1001 p_sys->p_context->time_base.num *
1002 i_block_rate / INPUT_RATE_DEFAULT /
1003 (2 * p_sys->p_context->time_base.den);