1 /*****************************************************************************
2 * demux.c: demuxer using ffmpeg (libavformat).
3 *****************************************************************************
4 * Copyright (C) 2004-2009 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_common.h>
34 #include <vlc_demux.h>
35 #include <vlc_stream.h>
37 #include <vlc_input.h>
38 #include <vlc_charset.h>
39 #include <vlc_avcodec.h>
42 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
43 # include <libavformat/avformat.h>
44 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
45 # include <ffmpeg/avformat.h>
48 #include "../../codec/avcodec/avcodec.h"
51 #include "../vobsub.h"
53 //#define AVFORMAT_DEBUG 1
55 /* Version checking */
56 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
58 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
59 # define HAVE_FFMPEG_CODEC_ATTACHMENT 1
62 #if (LIBAVFORMAT_VERSION_INT >= ((52<<16)+(15<<8)+0) )
63 # define HAVE_FFMPEG_CHAPTERS 1
66 /*****************************************************************************
67 * demux_sys_t: demux descriptor
68 *****************************************************************************/
88 input_attachment_t **attachments;
90 /* Only one title with seekpoints possible atm. */
91 input_title_t *p_title;
94 /*****************************************************************************
96 *****************************************************************************/
97 static int Demux ( demux_t *p_demux );
98 static int Control( demux_t *p_demux, int i_query, va_list args );
100 static int IORead( void *opaque, uint8_t *buf, int buf_size );
101 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
103 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
105 /*****************************************************************************
107 *****************************************************************************/
108 int OpenDemux( vlc_object_t *p_this )
110 demux_t *p_demux = (demux_t*)p_this;
115 int64_t i_start_time = -1;
117 /* Init Probe data */
118 pd.filename = p_demux->psz_path;
119 if( ( pd.buf_size = stream_Peek( p_demux->s, &pd.buf, 2048 + 213 ) ) <= 0 )
121 msg_Warn( p_demux, "cannot peek" );
126 av_register_all(); /* Can be called several times */
127 vlc_avcodec_unlock();
130 if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
132 msg_Dbg( p_demux, "couldn't guess format" );
136 /* Don't try to handle MPEG unless forced */
137 if( !p_demux->b_force &&
138 ( !strcmp( fmt->name, "mpeg" ) ||
139 !strcmp( fmt->name, "vcd" ) ||
140 !strcmp( fmt->name, "vob" ) ||
141 !strcmp( fmt->name, "mpegts" ) ||
142 /* libavformat's redirector won't work */
143 !strcmp( fmt->name, "redir" ) ||
144 !strcmp( fmt->name, "sdp" ) ) )
149 /* Don't trigger false alarms on bin files */
150 if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
154 if( !p_demux->psz_path ) return VLC_EGENERIC;
156 i_len = strlen( p_demux->psz_path );
157 if( i_len < 4 ) return VLC_EGENERIC;
159 if( strcasecmp( &p_demux->psz_path[i_len - 4], ".str" ) &&
160 strcasecmp( &p_demux->psz_path[i_len - 4], ".xai" ) &&
161 strcasecmp( &p_demux->psz_path[i_len - 3], ".xa" ) )
167 msg_Dbg( p_demux, "detected format: %s", fmt->name );
169 /* Fill p_demux fields */
170 p_demux->pf_demux = Demux;
171 p_demux->pf_control = Control;
172 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
177 p_sys->i_pcr_tk = -1;
179 TAB_INIT( p_sys->i_attachments, p_sys->attachments);
180 p_sys->p_title = NULL;
182 /* Create I/O wrapper */
183 p_sys->io_buffer_size = 32768; /* FIXME */
184 p_sys->io_buffer = malloc( p_sys->io_buffer_size );
185 p_sys->url.priv_data = p_demux;
186 p_sys->url.prot = &p_sys->prot;
187 p_sys->url.prot->name = "VLC I/O wrapper";
188 p_sys->url.prot->url_open = 0;
189 p_sys->url.prot->url_read =
190 (int (*) (URLContext *, unsigned char *, int))IORead;
191 p_sys->url.prot->url_write = 0;
192 p_sys->url.prot->url_seek =
193 (int64_t (*) (URLContext *, int64_t, int))IOSeek;
194 p_sys->url.prot->url_close = 0;
195 p_sys->url.prot->next = 0;
196 init_put_byte( &p_sys->io, p_sys->io_buffer, p_sys->io_buffer_size,
197 0, &p_sys->url, IORead, NULL, IOSeek );
200 if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
203 msg_Err( p_demux, "av_open_input_stream failed" );
204 CloseDemux( p_this );
208 vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
209 if( av_find_stream_info( p_sys->ic ) < 0 )
211 vlc_avcodec_unlock();
212 msg_Warn( p_demux, "av_find_stream_info failed" );
214 vlc_avcodec_unlock();
216 for( i = 0; i < p_sys->ic->nb_streams; i++ )
218 AVStream *s = p_sys->ic->streams[i];
219 AVCodecContext *cc = s->codec;
224 const char *psz_type = "unknown";
226 if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
227 fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
229 switch( cc->codec_type )
231 case CODEC_TYPE_AUDIO:
232 es_format_Init( &fmt, AUDIO_ES, fcc );
233 fmt.i_bitrate = cc->bit_rate;
234 fmt.audio.i_channels = cc->channels;
235 fmt.audio.i_rate = cc->sample_rate;
236 #if LIBAVCODEC_VERSION_INT < ((52<<16)+(0<<8)+0)
237 fmt.audio.i_bitspersample = cc->bits_per_sample;
239 fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
241 fmt.audio.i_blockalign = cc->block_align;
245 case CODEC_TYPE_VIDEO:
246 es_format_Init( &fmt, VIDEO_ES, fcc );
248 /* Special case for raw video data */
249 if( cc->codec_id == CODEC_ID_RAWVIDEO )
251 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
252 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
254 msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
257 fmt.i_codec = fmt.video.i_chroma;
260 fmt.video.i_width = cc->width;
261 fmt.video.i_height = cc->height;
264 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
265 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
270 case CODEC_TYPE_SUBTITLE:
271 es_format_Init( &fmt, SPU_ES, fcc );
272 if( strncmp( p_sys->ic->iformat->name, "matroska", 8 ) == 0 &&
273 cc->codec_id == CODEC_ID_DVD_SUBTITLE &&
274 cc->extradata != NULL &&
275 cc->extradata_size > 0 )
278 char *psz_buf = malloc( cc->extradata_size + 1);
279 if( psz_buf != NULL )
281 memcpy( psz_buf, cc->extradata , cc->extradata_size );
282 psz_buf[cc->extradata_size] = '\0';
284 psz_start = strstr( psz_buf, "size:" );
286 vobsub_size_parse( psz_start,
287 &fmt.subs.spu.i_original_frame_width,
288 &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS )
290 msg_Dbg( p_demux, "original frame size: %dx%d",
291 fmt.subs.spu.i_original_frame_width,
292 fmt.subs.spu.i_original_frame_height );
296 msg_Warn( p_demux, "reading original frame size failed" );
299 psz_start = strstr( psz_buf, "palette:" );
301 vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS )
303 fmt.subs.spu.palette[0] = 0xBeef;
304 msg_Dbg( p_demux, "vobsub palette read" );
308 msg_Warn( p_demux, "reading original palette failed" );
314 psz_type = "subtitle";
318 es_format_Init( &fmt, UNKNOWN_ES, 0 );
319 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
320 if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
322 input_attachment_t *p_attachment;
323 psz_type = "attachment";
324 if( cc->codec_id == CODEC_ID_TTF )
326 p_attachment = vlc_input_attachment_New( s->filename, "application/x-truetype-font", NULL,
327 cc->extradata, (int)cc->extradata_size );
328 TAB_APPEND( p_sys->i_attachments, p_sys->attachments, p_attachment );
330 else msg_Warn( p_demux, "unsupported attachment type in ffmpeg demux" );
335 if( cc->codec_type == CODEC_TYPE_DATA )
338 msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
341 fmt.psz_language = strdup( s->language );
343 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
344 if( cc->codec_type != CODEC_TYPE_ATTACHMENT )
347 const bool b_ogg = !strcmp( p_sys->fmt->name, "ogg" );
348 const uint8_t *p_extra = cc->extradata;
349 unsigned i_extra = cc->extradata_size;
351 if( cc->codec_id == CODEC_ID_THEORA && b_ogg )
356 for( i_count = 0; i_count < 3; i_count++ )
360 pi_size[i_count] = GetWBE( p_extra );
361 pp_data[i_count] = (uint8_t*)&p_extra[2];
362 if( i_extra < pi_size[i_count] + 2 )
365 p_extra += 2 + pi_size[i_count];
366 i_extra -= 2 + pi_size[i_count];
368 if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
369 pi_size, pp_data, i_count ) )
375 else if( cc->codec_id == CODEC_ID_SPEEX && b_ogg )
377 uint8_t p_dummy_comment[] = {
384 pi_size[0] = i_extra;
385 pp_data[0] = (uint8_t*)p_extra;
387 pi_size[1] = sizeof(p_dummy_comment);
388 pp_data[1] = p_dummy_comment;
390 if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
391 pi_size, pp_data, 2 ) )
397 else if( cc->extradata_size > 0 )
399 fmt.p_extra = malloc( i_extra );
402 fmt.i_extra = i_extra;
403 memcpy( fmt.p_extra, p_extra, i_extra );
407 es = es_out_Add( p_demux->out, &fmt );
408 es_format_Clean( &fmt );
410 msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
411 psz_type, (char*)&fcc );
412 TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
414 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
415 i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
417 msg_Dbg( p_demux, "AVFormat supported stream" );
418 msg_Dbg( p_demux, " - format = %s (%s)",
419 p_sys->fmt->name, p_sys->fmt->long_name );
420 msg_Dbg( p_demux, " - start time = %"PRId64, i_start_time );
421 msg_Dbg( p_demux, " - duration = %"PRId64,
422 ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
423 p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
425 #ifdef HAVE_FFMPEG_CHAPTERS
426 if( p_sys->ic->nb_chapters > 0 )
427 p_sys->p_title = vlc_input_title_New();
428 for( i = 0; i < p_sys->ic->nb_chapters; i++ )
430 seekpoint_t *s = vlc_seekpoint_New();
432 if( p_sys->ic->chapters[i]->title )
434 s->psz_name = strdup( p_sys->ic->chapters[i]->title );
435 EnsureUTF8( s->psz_name );
436 msg_Dbg( p_demux, " - chapter %d: %s", i, s->psz_name );
438 s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
439 p_sys->ic->chapters[i]->time_base.num /
440 p_sys->ic->chapters[i]->time_base.den -
441 (i_start_time != -1 ? i_start_time : 0 );
442 TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
449 /*****************************************************************************
451 *****************************************************************************/
452 void CloseDemux( vlc_object_t *p_this )
454 demux_t *p_demux = (demux_t*)p_this;
455 demux_sys_t *p_sys = p_demux->p_sys;
457 FREENULL( p_sys->tk );
459 if( p_sys->ic ) av_close_input_stream( p_sys->ic );
461 for( int i = 0; i < p_sys->i_attachments; i++ )
462 free( p_sys->attachments[i] );
463 TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
466 vlc_input_title_Delete( p_sys->p_title );
468 free( p_sys->io_buffer );
472 /*****************************************************************************
474 *****************************************************************************/
475 static int Demux( demux_t *p_demux )
477 demux_sys_t *p_sys = p_demux->p_sys;
480 int64_t i_start_time;
483 if( av_read_frame( p_sys->ic, &pkt ) )
487 if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
489 av_free_packet( &pkt );
492 const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
494 if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
499 memcpy( p_frame->p_buffer, pkt.data, pkt.size );
501 if( pkt.flags & PKT_FLAG_KEY )
502 p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
504 i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
505 ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE ) : 0;
507 p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
508 VLC_TS_INVALID : (pkt.dts) * 1000000 *
509 p_stream->time_base.num /
510 p_stream->time_base.den - i_start_time + VLC_TS_0;
511 p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
512 VLC_TS_INVALID : (pkt.pts) * 1000000 *
513 p_stream->time_base.num /
514 p_stream->time_base.den - i_start_time + VLC_TS_0;
515 if( pkt.duration > 0 )
516 p_frame->i_length = pkt.duration * 1000000 *
517 p_stream->time_base.num /
518 p_stream->time_base.den - i_start_time;
520 if( pkt.dts != AV_NOPTS_VALUE && pkt.dts == pkt.pts &&
521 p_stream->codec->codec_type == CODEC_TYPE_VIDEO )
523 /* Add here notoriously bugged file formats/samples regarding PTS */
524 if( !strcmp( p_sys->fmt->name, "flv" ) )
525 p_frame->i_pts = VLC_TS_INVALID;
527 #ifdef AVFORMAT_DEBUG
528 msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
529 pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
532 if( p_frame->i_dts > VLC_TS_INVALID &&
533 ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
535 p_sys->i_pcr_tk = pkt.stream_index;
536 p_sys->i_pcr = p_frame->i_dts;
538 es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
541 es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
543 UpdateSeekPoint( p_demux, p_sys->i_pcr);
544 av_free_packet( &pkt );
548 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
550 demux_sys_t *p_sys = p_demux->p_sys;
553 if( !p_sys->p_title )
556 for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
558 if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
563 if( i != p_demux->info.i_seekpoint && i >= 0 )
565 p_demux->info.i_seekpoint = i;
566 p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
570 /*****************************************************************************
572 *****************************************************************************/
573 static int Control( demux_t *p_demux, int i_query, va_list args )
575 demux_sys_t *p_sys = p_demux->p_sys;
581 case DEMUX_GET_POSITION:
582 pf = (double*) va_arg( args, double* ); *pf = 0.0;
583 i64 = stream_Size( p_demux->s );
586 double current = stream_Tell( p_demux->s );
587 *pf = current / (double)i64;
590 if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
592 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
597 case DEMUX_SET_POSITION:
598 f = (double) va_arg( args, double );
599 if( p_sys->i_pcr > 0 )
601 i64 = p_sys->ic->duration * f;
602 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
603 i64 += p_sys->ic->start_time;
605 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
607 /* If we have a duration, we prefer to seek by time
608 but if we don't, or if the seek fails, try BYTE seeking */
609 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
610 (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
612 int64_t i_size = stream_Size( p_demux->s );
615 msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
616 if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
621 UpdateSeekPoint( p_demux, i64 );
623 p_sys->i_pcr = -1; /* Invalidate time display */
627 case DEMUX_GET_LENGTH:
628 pi64 = (int64_t*)va_arg( args, int64_t * );
629 if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
631 *pi64 = p_sys->ic->duration;
637 pi64 = (int64_t*)va_arg( args, int64_t * );
638 *pi64 = p_sys->i_pcr;
642 i64 = (int64_t)va_arg( args, int64_t );
643 i64 = i64 *AV_TIME_BASE / 1000000;
644 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
645 i64 += p_sys->ic->start_time;
647 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
649 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
653 p_sys->i_pcr = -1; /* Invalidate time display */
654 UpdateSeekPoint( p_demux, i64 );
657 case DEMUX_HAS_UNSUPPORTED_META:
659 bool *pb_bool = (bool*)va_arg( args, bool* );
667 vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
669 if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
670 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
671 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
676 if( p_sys->ic->title[0] )
677 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
678 if( p_sys->ic->author[0] )
679 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
680 if( p_sys->ic->copyright[0] )
681 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
682 if( p_sys->ic->comment[0] )
683 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
684 if( p_sys->ic->genre[0] )
685 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
689 case DEMUX_GET_ATTACHMENTS:
691 input_attachment_t ***ppp_attach =
692 (input_attachment_t***)va_arg( args, input_attachment_t*** );
693 int *pi_int = (int*)va_arg( args, int * );
696 if( p_sys->i_attachments <= 0 )
699 *pi_int = p_sys->i_attachments;;
700 *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
701 for( i = 0; i < p_sys->i_attachments; i++ )
702 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
706 case DEMUX_GET_TITLE_INFO:
708 input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
709 int *pi_int = (int*)va_arg( args, int* );
710 int *pi_title_offset = (int*)va_arg( args, int* );
711 int *pi_seekpoint_offset = (int*)va_arg( args, int* );
713 if( !p_sys->p_title )
717 *ppp_title = malloc( sizeof( input_title_t**) );
718 (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
719 *pi_title_offset = 0;
720 *pi_seekpoint_offset = 0;
723 case DEMUX_SET_TITLE:
725 const int i_title = (int)va_arg( args, int );
726 if( !p_sys->p_title || i_title != 0 )
730 case DEMUX_SET_SEEKPOINT:
732 const int i_seekpoint = (int)va_arg( args, int );
733 if( !p_sys->p_title )
736 i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
737 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
738 i64 += p_sys->ic->start_time;
740 msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
742 if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
746 p_sys->i_pcr = -1; /* Invalidate time display */
747 UpdateSeekPoint( p_demux, i64 );
757 /*****************************************************************************
758 * I/O wrappers for libavformat
759 *****************************************************************************/
760 static int IORead( void *opaque, uint8_t *buf, int buf_size )
762 URLContext *p_url = opaque;
763 demux_t *p_demux = p_url->priv_data;
764 if( buf_size < 0 ) return -1;
765 int i_ret = stream_Read( p_demux->s, buf, buf_size );
766 return i_ret ? i_ret : -1;
769 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
771 URLContext *p_url = opaque;
772 demux_t *p_demux = p_url->priv_data;
774 int64_t i_size = stream_Size( p_demux->s );
776 #ifdef AVFORMAT_DEBUG
777 msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
787 i_absolute = (int64_t)offset;
790 i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
793 i_absolute = i_size + (int64_t)offset;
802 msg_Dbg( p_demux, "Trying to seek before the beginning" );
806 if( i_size > 0 && i_absolute >= i_size )
808 msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
812 if( stream_Seek( p_demux->s, i_absolute ) )
814 msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
818 return stream_Tell( p_demux->s );
821 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */