git.sesse.net Git - vlc/blob - modules/demux/avformat/demux.c

   1 /*****************************************************************************
   2  * demux.c: demuxer using ffmpeg (libavformat).
   3  *****************************************************************************
   4  * Copyright (C) 2004-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  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.
  14  *
  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.
  19  *
  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  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28
  29 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_demux.h>
  35 #include <vlc_stream.h>
  36 #include <vlc_meta.h>
  37 #include <vlc_input.h>
  38 #include <vlc_charset.h>
  39 #include <vlc_avcodec.h>
  40
  41 /* ffmpeg header */
  42 #if defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  43 #   include <libavformat/avformat.h>
  44 #elif defined(HAVE_FFMPEG_AVFORMAT_H)
  45 #   include <ffmpeg/avformat.h>
  46 #endif
  47
  48 #include "../../codec/avcodec/avcodec.h"
  49 #include "avformat.h"
  50 #include "../xiph.h"
  51 #include "../vobsub.h"
  52
  53 //#define AVFORMAT_DEBUG 1
  54
  55 /* Version checking */
  56 #if defined(HAVE_FFMPEG_AVFORMAT_H) || defined(HAVE_LIBAVFORMAT_AVFORMAT_H)
  57
  58 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(50<<8)+0) )
  59 #   define HAVE_FFMPEG_CODEC_ATTACHMENT 1
  60 #endif
  61
  62 #if (LIBAVFORMAT_VERSION_INT >= ((52<<16)+(15<<8)+0) )
  63 #   define HAVE_FFMPEG_CHAPTERS 1
  64 #endif
  65
  66 /*****************************************************************************
  67  * demux_sys_t: demux descriptor
  68  *****************************************************************************/
  69 struct demux_sys_t
  70 {
  71     ByteIOContext   io;
  72     int             io_buffer_size;
  73     uint8_t        *io_buffer;
  74
  75     AVInputFormat  *fmt;
  76     AVFormatContext *ic;
  77     URLContext     url;
  78     URLProtocol    prot;
  79
  80     int             i_tk;
  81     es_out_id_t     **tk;
  82
  83     int64_t     i_pcr;
  84     int64_t     i_pcr_inc;
  85     int         i_pcr_tk;
  86
  87     int                i_attachments;
  88     input_attachment_t **attachments;
  89
  90     /* Only one title with seekpoints possible atm. */
  91     input_title_t *p_title;
  92 };
  93
  94 /*****************************************************************************
  95  * Local prototypes
  96  *****************************************************************************/
  97 static int Demux  ( demux_t *p_demux );
  98 static int Control( demux_t *p_demux, int i_query, va_list args );
  99
 100 static int IORead( void *opaque, uint8_t *buf, int buf_size );
 101 static int64_t IOSeek( void *opaque, int64_t offset, int whence );
 102
 103 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time );
 104
 105 /*****************************************************************************
 106  * Open
 107  *****************************************************************************/
 108 int OpenDemux( vlc_object_t *p_this )
 109 {
 110     demux_t       *p_demux = (demux_t*)p_this;
 111     demux_sys_t   *p_sys;
 112     AVProbeData   pd;
 113     AVInputFormat *fmt;
 114     unsigned int  i;
 115     int64_t       i_start_time = -1;
 116
 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 )
 120     {
 121         msg_Warn( p_demux, "cannot peek" );
 122         return VLC_EGENERIC;
 123     }
 124
 125     vlc_avcodec_lock();
 126     av_register_all(); /* Can be called several times */
 127     vlc_avcodec_unlock();
 128
 129     /* Guess format */
 130     if( !( fmt = av_probe_input_format( &pd, 1 ) ) )
 131     {
 132         msg_Dbg( p_demux, "couldn't guess format" );
 133         return VLC_EGENERIC;
 134     }
 135
 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" ) ) )
 145     {
 146         return VLC_EGENERIC;
 147     }
 148
 149     /* Don't trigger false alarms on bin files */
 150     if( !p_demux->b_force && !strcmp( fmt->name, "psxstr" ) )
 151     {
 152         int i_len;
 153
 154         if( !p_demux->psz_path ) return VLC_EGENERIC;
 155
 156         i_len = strlen( p_demux->psz_path );
 157         if( i_len < 4 ) return VLC_EGENERIC;
 158
 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" ) )
 162         {
 163             return VLC_EGENERIC;
 164         }
 165     }
 166
 167     msg_Dbg( p_demux, "detected format: %s", fmt->name );
 168
 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 ) );
 173     p_sys->ic = 0;
 174     p_sys->fmt = fmt;
 175     p_sys->i_tk = 0;
 176     p_sys->tk = NULL;
 177     p_sys->i_pcr_tk = -1;
 178     p_sys->i_pcr = -1;
 179     TAB_INIT( p_sys->i_attachments, p_sys->attachments);
 180     p_sys->p_title = NULL;
 181
 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 );
 198
 199     /* Open it */
 200     if( av_open_input_stream( &p_sys->ic, &p_sys->io, p_demux->psz_path,
 201                               p_sys->fmt, NULL ) )
 202     {
 203         msg_Err( p_demux, "av_open_input_stream failed" );
 204         CloseDemux( p_this );
 205         return VLC_EGENERIC;
 206     }
 207
 208     vlc_avcodec_lock(); /* avformat calls avcodec behind our back!!! */
 209     if( av_find_stream_info( p_sys->ic ) < 0 )
 210     {
 211         vlc_avcodec_unlock();
 212         msg_Warn( p_demux, "av_find_stream_info failed" );
 213     }
 214     vlc_avcodec_unlock();
 215
 216     for( i = 0; i < p_sys->ic->nb_streams; i++ )
 217     {
 218         AVStream *s = p_sys->ic->streams[i];
 219         AVCodecContext *cc = s->codec;
 220
 221         es_out_id_t  *es;
 222         es_format_t  fmt;
 223         vlc_fourcc_t fcc;
 224         const char *psz_type = "unknown";
 225
 226         if( !GetVlcFourcc( cc->codec_id, NULL, &fcc, NULL ) )
 227             fcc = VLC_FOURCC( 'u', 'n', 'd', 'f' );
 228
 229         switch( cc->codec_type )
 230         {
 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;
 238 #else
 239             fmt.audio.i_bitspersample = cc->bits_per_coded_sample;
 240 #endif
 241             fmt.audio.i_blockalign = cc->block_align;
 242             psz_type = "audio";
 243             break;
 244
 245         case CODEC_TYPE_VIDEO:
 246             es_format_Init( &fmt, VIDEO_ES, fcc );
 247
 248             /* Special case for raw video data */
 249             if( cc->codec_id == CODEC_ID_RAWVIDEO )
 250             {
 251                 msg_Dbg( p_demux, "raw video, pixel format: %i", cc->pix_fmt );
 252                 if( GetVlcChroma( &fmt.video, cc->pix_fmt ) != VLC_SUCCESS)
 253                 {
 254                     msg_Err( p_demux, "was unable to find a FourCC match for raw video" );
 255                 }
 256                 else
 257                     fmt.i_codec = fmt.video.i_chroma;
 258             }
 259
 260             fmt.video.i_width = cc->width;
 261             fmt.video.i_height = cc->height;
 262             if( cc->palctrl )
 263             {
 264                 fmt.video.p_palette = malloc( sizeof(video_palette_t) );
 265                 *fmt.video.p_palette = *(video_palette_t *)cc->palctrl;
 266             }
 267             psz_type = "video";
 268             break;
 269
 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 )
 276             {
 277                 char *psz_start;
 278                 char *psz_buf = malloc( cc->extradata_size + 1);
 279                 if( psz_buf != NULL )
 280                 {
 281                     memcpy( psz_buf, cc->extradata , cc->extradata_size );
 282                     psz_buf[cc->extradata_size] = '\0';
 283
 284                     psz_start = strstr( psz_buf, "size:" );
 285                     if( psz_start &&
 286                         vobsub_size_parse( psz_start,
 287                                            &fmt.subs.spu.i_original_frame_width,
 288                                            &fmt.subs.spu.i_original_frame_height ) == VLC_SUCCESS )
 289                     {
 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 );
 293                     }
 294                     else
 295                     {
 296                         msg_Warn( p_demux, "reading original frame size failed" );
 297                     }
 298
 299                     psz_start = strstr( psz_buf, "palette:" );
 300                     if( psz_start &&
 301                         vobsub_palette_parse( psz_start, &fmt.subs.spu.palette[1] ) == VLC_SUCCESS )
 302                     {
 303                         fmt.subs.spu.palette[0] =  0xBeef;
 304                         msg_Dbg( p_demux, "vobsub palette read" );
 305                     }
 306                     else
 307                     {
 308                         msg_Warn( p_demux, "reading original palette failed" );
 309                     }
 310                     free( psz_buf );
 311                 }
 312             }
 313
 314             psz_type = "subtitle";
 315             break;
 316
 317         default:
 318             es_format_Init( &fmt, UNKNOWN_ES, 0 );
 319 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
 320             if( cc->codec_type == CODEC_TYPE_ATTACHMENT )
 321             {
 322                 input_attachment_t *p_attachment;
 323                 psz_type = "attachment";
 324                 if( cc->codec_id == CODEC_ID_TTF )
 325                 {
 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 );
 329                 }
 330                 else msg_Warn( p_demux, "unsupported attachment type in ffmpeg demux" );
 331             }
 332             break;
 333 #endif
 334
 335             if( cc->codec_type == CODEC_TYPE_DATA )
 336                 psz_type = "data";
 337
 338             msg_Warn( p_demux, "unsupported track type in ffmpeg demux" );
 339             break;
 340         }
 341         fmt.psz_language = strdup( s->language );
 342         if( s->disposition & AV_DISPOSITION_DEFAULT )
 343             fmt.i_priority = 1000;
 344
 345 #ifdef HAVE_FFMPEG_CODEC_ATTACHMENT
 346         if( cc->codec_type != CODEC_TYPE_ATTACHMENT )
 347 #endif
 348         {
 349             const bool    b_ogg = !strcmp( p_sys->fmt->name, "ogg" );
 350             const uint8_t *p_extra = cc->extradata;
 351             unsigned      i_extra  = cc->extradata_size;
 352
 353             if( cc->codec_id == CODEC_ID_THEORA && b_ogg )
 354             {
 355                 unsigned pi_size[3];
 356                 void     *pp_data[3];
 357                 unsigned i_count;
 358                 for( i_count = 0; i_count < 3; i_count++ )
 359                 {
 360                     if( i_extra < 2 )
 361                         break;
 362                     pi_size[i_count] = GetWBE( p_extra );
 363                     pp_data[i_count] = (uint8_t*)&p_extra[2];
 364                     if( i_extra < pi_size[i_count] + 2 )
 365                         break;
 366
 367                     p_extra += 2 + pi_size[i_count];
 368                     i_extra -= 2 + pi_size[i_count];
 369                 }
 370                 if( i_count > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 371                                                      pi_size, pp_data, i_count ) )
 372                 {
 373                     fmt.i_extra = 0;
 374                     fmt.p_extra = NULL;
 375                 }
 376             }
 377             else if( cc->codec_id == CODEC_ID_SPEEX && b_ogg )
 378             {
 379                 uint8_t p_dummy_comment[] = {
 380                     0, 0, 0, 0,
 381                     0, 0, 0, 0,
 382                 };
 383                 unsigned pi_size[2];
 384                 void     *pp_data[2];
 385
 386                 pi_size[0] = i_extra;
 387                 pp_data[0] = (uint8_t*)p_extra;
 388
 389                 pi_size[1] = sizeof(p_dummy_comment);
 390                 pp_data[1] = p_dummy_comment;
 391
 392                 if( pi_size[0] > 0 && xiph_PackHeaders( &fmt.i_extra, &fmt.p_extra,
 393                                                         pi_size, pp_data, 2 ) )
 394                 {
 395                     fmt.i_extra = 0;
 396                     fmt.p_extra = NULL;
 397                 }
 398             }
 399             else if( cc->extradata_size > 0 )
 400             {
 401                 fmt.p_extra = malloc( i_extra );
 402                 if( fmt.p_extra )
 403                 {
 404                     fmt.i_extra = i_extra;
 405                     memcpy( fmt.p_extra, p_extra, i_extra );
 406                 }
 407             }
 408         }
 409         es = es_out_Add( p_demux->out, &fmt );
 410         if( s->disposition & AV_DISPOSITION_DEFAULT )
 411             es_out_Control( p_demux->out, ES_OUT_SET_ES_DEFAULT, es );
 412         es_format_Clean( &fmt );
 413
 414         msg_Dbg( p_demux, "adding es: %s codec = %4.4s",
 415                  psz_type, (char*)&fcc );
 416         TAB_APPEND( p_sys->i_tk, p_sys->tk, es );
 417     }
 418     if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 419         i_start_time = p_sys->ic->start_time * 1000000 / AV_TIME_BASE;
 420
 421     msg_Dbg( p_demux, "AVFormat supported stream" );
 422     msg_Dbg( p_demux, "    - format = %s (%s)",
 423              p_sys->fmt->name, p_sys->fmt->long_name );
 424     msg_Dbg( p_demux, "    - start time = %"PRId64, i_start_time );
 425     msg_Dbg( p_demux, "    - duration = %"PRId64,
 426              ( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE ) ?
 427              p_sys->ic->duration * 1000000 / AV_TIME_BASE : -1 );
 428
 429 #ifdef HAVE_FFMPEG_CHAPTERS
 430     if( p_sys->ic->nb_chapters > 0 )
 431         p_sys->p_title = vlc_input_title_New();
 432     for( i = 0; i < p_sys->ic->nb_chapters; i++ )
 433     {
 434         seekpoint_t *s = vlc_seekpoint_New();
 435
 436         if( p_sys->ic->chapters[i]->title )
 437         {
 438             s->psz_name = strdup( p_sys->ic->chapters[i]->title );
 439             EnsureUTF8( s->psz_name );
 440             msg_Dbg( p_demux, "    - chapter %d: %s", i, s->psz_name );
 441         }
 442         s->i_time_offset = p_sys->ic->chapters[i]->start * 1000000 *
 443             p_sys->ic->chapters[i]->time_base.num /
 444             p_sys->ic->chapters[i]->time_base.den -
 445             (i_start_time != -1 ? i_start_time : 0 );
 446         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
 447     }
 448 #endif
 449
 450     return VLC_SUCCESS;
 451 }
 452
 453 /*****************************************************************************
 454  * Close
 455  *****************************************************************************/
 456 void CloseDemux( vlc_object_t *p_this )
 457 {
 458     demux_t     *p_demux = (demux_t*)p_this;
 459     demux_sys_t *p_sys = p_demux->p_sys;
 460
 461     FREENULL( p_sys->tk );
 462
 463     if( p_sys->ic ) av_close_input_stream( p_sys->ic );
 464
 465     for( int i = 0; i < p_sys->i_attachments; i++ )
 466         free( p_sys->attachments[i] );
 467     TAB_CLEAN( p_sys->i_attachments, p_sys->attachments);
 468
 469     if( p_sys->p_title )
 470         vlc_input_title_Delete( p_sys->p_title );
 471
 472     free( p_sys->io_buffer );
 473     free( p_sys );
 474 }
 475
 476 /*****************************************************************************
 477  * Demux:
 478  *****************************************************************************/
 479 static int Demux( demux_t *p_demux )
 480 {
 481     demux_sys_t *p_sys = p_demux->p_sys;
 482     AVPacket    pkt;
 483     block_t     *p_frame;
 484     int64_t     i_start_time;
 485
 486     /* Read a frame */
 487     if( av_read_frame( p_sys->ic, &pkt ) )
 488     {
 489         return 0;
 490     }
 491     if( pkt.stream_index < 0 || pkt.stream_index >= p_sys->i_tk )
 492     {
 493         av_free_packet( &pkt );
 494         return 1;
 495     }
 496     const AVStream *p_stream = p_sys->ic->streams[pkt.stream_index];
 497
 498     if( ( p_frame = block_New( p_demux, pkt.size ) ) == NULL )
 499     {
 500         return 0;
 501     }
 502
 503     memcpy( p_frame->p_buffer, pkt.data, pkt.size );
 504
 505     if( pkt.flags & PKT_FLAG_KEY )
 506         p_frame->i_flags |= BLOCK_FLAG_TYPE_I;
 507
 508     i_start_time = ( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE ) ?
 509         ( p_sys->ic->start_time * 1000000 / AV_TIME_BASE )  : 0;
 510
 511     p_frame->i_dts = ( pkt.dts == (int64_t)AV_NOPTS_VALUE ) ?
 512         VLC_TS_INVALID : (pkt.dts) * 1000000 *
 513         p_stream->time_base.num /
 514         p_stream->time_base.den - i_start_time + VLC_TS_0;
 515     p_frame->i_pts = ( pkt.pts == (int64_t)AV_NOPTS_VALUE ) ?
 516         VLC_TS_INVALID : (pkt.pts) * 1000000 *
 517         p_stream->time_base.num /
 518         p_stream->time_base.den - i_start_time + VLC_TS_0;
 519     if( pkt.duration > 0 )
 520         p_frame->i_length = pkt.duration * 1000000 *
 521             p_stream->time_base.num /
 522             p_stream->time_base.den - i_start_time;
 523
 524     if( pkt.dts != AV_NOPTS_VALUE && pkt.dts == pkt.pts &&
 525         p_stream->codec->codec_type == CODEC_TYPE_VIDEO )
 526     {
 527         /* Add here notoriously bugged file formats/samples regarding PTS */
 528         if( !strcmp( p_sys->fmt->name, "flv" ) )
 529             p_frame->i_pts = VLC_TS_INVALID;
 530     }
 531 #ifdef AVFORMAT_DEBUG
 532     msg_Dbg( p_demux, "tk[%d] dts=%"PRId64" pts=%"PRId64,
 533              pkt.stream_index, p_frame->i_dts, p_frame->i_pts );
 534 #endif
 535
 536     if( p_frame->i_dts > VLC_TS_INVALID  &&
 537         ( pkt.stream_index == p_sys->i_pcr_tk || p_sys->i_pcr_tk < 0 ) )
 538     {
 539         p_sys->i_pcr_tk = pkt.stream_index;
 540         p_sys->i_pcr = p_frame->i_dts;
 541
 542         es_out_Control( p_demux->out, ES_OUT_SET_PCR, (int64_t)p_sys->i_pcr );
 543     }
 544
 545     es_out_Send( p_demux->out, p_sys->tk[pkt.stream_index], p_frame );
 546
 547     UpdateSeekPoint( p_demux, p_sys->i_pcr);
 548     av_free_packet( &pkt );
 549     return 1;
 550 }
 551
 552 static void UpdateSeekPoint( demux_t *p_demux, int64_t i_time )
 553 {
 554     demux_sys_t *p_sys = p_demux->p_sys;
 555     int i;
 556
 557     if( !p_sys->p_title )
 558         return;
 559
 560     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 561     {
 562         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 563             break;
 564     }
 565     i--;
 566
 567     if( i != p_demux->info.i_seekpoint && i >= 0 )
 568     {
 569         p_demux->info.i_seekpoint = i;
 570         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 571     }
 572 }
 573
 574 /*****************************************************************************
 575  * Control:
 576  *****************************************************************************/
 577 static int Control( demux_t *p_demux, int i_query, va_list args )
 578 {
 579     demux_sys_t *p_sys = p_demux->p_sys;
 580     double f, *pf;
 581     int64_t i64, *pi64;
 582
 583     switch( i_query )
 584     {
 585         case DEMUX_GET_POSITION:
 586             pf = (double*) va_arg( args, double* ); *pf = 0.0;
 587             i64 = stream_Size( p_demux->s );
 588             if( i64 > 0 )
 589             {
 590                 double current = stream_Tell( p_demux->s );
 591                 *pf = current / (double)i64;
 592             }
 593
 594             if( (p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE) && (p_sys->i_pcr > 0) )
 595             {
 596                 *pf = (double)p_sys->i_pcr / (double)p_sys->ic->duration;
 597             }
 598
 599             return VLC_SUCCESS;
 600
 601         case DEMUX_SET_POSITION:
 602             f = (double) va_arg( args, double );
 603             if( p_sys->i_pcr > 0 )
 604             {
 605                 i64 = p_sys->ic->duration * f;
 606                 if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 607                     i64 += p_sys->ic->start_time;
 608
 609                 msg_Warn( p_demux, "DEMUX_SET_POSITION: %"PRId64, i64 );
 610
 611                 /* If we have a duration, we prefer to seek by time
 612                    but if we don't, or if the seek fails, try BYTE seeking */
 613                 if( p_sys->ic->duration == (int64_t)AV_NOPTS_VALUE ||
 614                     (av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0) )
 615                 {
 616                     int64_t i_size = stream_Size( p_demux->s );
 617                     i64 = (i_size * f);
 618
 619                     msg_Warn( p_demux, "DEMUX_SET_BYTE_POSITION: %"PRId64, i64 );
 620                     if( av_seek_frame( p_sys->ic, -1, i64, AVSEEK_FLAG_BYTE ) < 0 )
 621                         return VLC_EGENERIC;
 622                 }
 623                 else
 624                 {
 625                     UpdateSeekPoint( p_demux, i64 );
 626                 }
 627                 p_sys->i_pcr = -1; /* Invalidate time display */
 628             }
 629             return VLC_SUCCESS;
 630
 631         case DEMUX_GET_LENGTH:
 632             pi64 = (int64_t*)va_arg( args, int64_t * );
 633             if( p_sys->ic->duration != (int64_t)AV_NOPTS_VALUE )
 634             {
 635                 *pi64 = p_sys->ic->duration;
 636             }
 637             else *pi64 = 0;
 638             return VLC_SUCCESS;
 639
 640         case DEMUX_GET_TIME:
 641             pi64 = (int64_t*)va_arg( args, int64_t * );
 642             *pi64 = p_sys->i_pcr;
 643             return VLC_SUCCESS;
 644
 645         case DEMUX_SET_TIME:
 646             i64 = (int64_t)va_arg( args, int64_t );
 647             i64 = i64 *AV_TIME_BASE / 1000000;
 648             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 649                 i64 += p_sys->ic->start_time;
 650
 651             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 652
 653             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 654             {
 655                 return VLC_EGENERIC;
 656             }
 657             p_sys->i_pcr = -1; /* Invalidate time display */
 658             UpdateSeekPoint( p_demux, i64 );
 659             return VLC_SUCCESS;
 660
 661         case DEMUX_HAS_UNSUPPORTED_META:
 662         {
 663             bool *pb_bool = (bool*)va_arg( args, bool* );
 664             *pb_bool = true;
 665             return VLC_SUCCESS;
 666         }
 667
 668
 669         case DEMUX_GET_META:
 670         {
 671             vlc_meta_t *p_meta = (vlc_meta_t*)va_arg( args, vlc_meta_t* );
 672
 673             if( !p_sys->ic->title[0] || !p_sys->ic->author[0] ||
 674                 !p_sys->ic->copyright[0] || !p_sys->ic->comment[0] ||
 675                 /*!p_sys->ic->album[0] ||*/ !p_sys->ic->genre[0] )
 676             {
 677                 return VLC_EGENERIC;
 678             }
 679
 680             if( p_sys->ic->title[0] )
 681                 vlc_meta_SetTitle( p_meta, p_sys->ic->title );
 682             if( p_sys->ic->author[0] )
 683                 vlc_meta_SetArtist( p_meta, p_sys->ic->author );
 684             if( p_sys->ic->copyright[0] )
 685                 vlc_meta_SetCopyright( p_meta, p_sys->ic->copyright );
 686             if( p_sys->ic->comment[0] )
 687                 vlc_meta_SetDescription( p_meta, p_sys->ic->comment );
 688             if( p_sys->ic->genre[0] )
 689                 vlc_meta_SetGenre( p_meta, p_sys->ic->genre );
 690             return VLC_SUCCESS;
 691         }
 692
 693         case DEMUX_GET_ATTACHMENTS:
 694         {
 695             input_attachment_t ***ppp_attach =
 696                 (input_attachment_t***)va_arg( args, input_attachment_t*** );
 697             int *pi_int = (int*)va_arg( args, int * );
 698             int i;
 699
 700             if( p_sys->i_attachments <= 0 )
 701                 return VLC_EGENERIC;
 702
 703             *pi_int = p_sys->i_attachments;;
 704             *ppp_attach = malloc( sizeof(input_attachment_t**) * p_sys->i_attachments );
 705             for( i = 0; i < p_sys->i_attachments; i++ )
 706                 (*ppp_attach)[i] = vlc_input_attachment_Duplicate( p_sys->attachments[i] );
 707             return VLC_SUCCESS;
 708         }
 709
 710         case DEMUX_GET_TITLE_INFO:
 711         {
 712             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 713             int *pi_int    = (int*)va_arg( args, int* );
 714             int *pi_title_offset = (int*)va_arg( args, int* );
 715             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 716
 717             if( !p_sys->p_title )
 718                 return VLC_EGENERIC;
 719
 720             *pi_int = 1;
 721             *ppp_title = malloc( sizeof( input_title_t**) );
 722             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 723             *pi_title_offset = 0;
 724             *pi_seekpoint_offset = 0;
 725             return VLC_SUCCESS;
 726         }
 727         case DEMUX_SET_TITLE:
 728         {
 729             const int i_title = (int)va_arg( args, int );
 730             if( !p_sys->p_title || i_title != 0 )
 731                 return VLC_EGENERIC;
 732             return VLC_SUCCESS;
 733         }
 734         case DEMUX_SET_SEEKPOINT:
 735         {
 736             const int i_seekpoint = (int)va_arg( args, int );
 737             if( !p_sys->p_title )
 738                 return VLC_EGENERIC;
 739
 740             i64 = p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset *AV_TIME_BASE / 1000000;
 741             if( p_sys->ic->start_time != (int64_t)AV_NOPTS_VALUE )
 742                 i64 += p_sys->ic->start_time;
 743
 744             msg_Warn( p_demux, "DEMUX_SET_TIME: %"PRId64, i64 );
 745
 746             if( av_seek_frame( p_sys->ic, -1, i64, 0 ) < 0 )
 747             {
 748                 return VLC_EGENERIC;
 749             }
 750             p_sys->i_pcr = -1; /* Invalidate time display */
 751             UpdateSeekPoint( p_demux, i64 );
 752             return VLC_SUCCESS;
 753         }
 754
 755
 756         default:
 757             return VLC_EGENERIC;
 758     }
 759 }
 760
 761 /*****************************************************************************
 762  * I/O wrappers for libavformat
 763  *****************************************************************************/
 764 static int IORead( void *opaque, uint8_t *buf, int buf_size )
 765 {
 766     URLContext *p_url = opaque;
 767     demux_t *p_demux = p_url->priv_data;
 768     if( buf_size < 0 ) return -1;
 769     int i_ret = stream_Read( p_demux->s, buf, buf_size );
 770     return i_ret ? i_ret : -1;
 771 }
 772
 773 static int64_t IOSeek( void *opaque, int64_t offset, int whence )
 774 {
 775     URLContext *p_url = opaque;
 776     demux_t *p_demux = p_url->priv_data;
 777     int64_t i_absolute;
 778     int64_t i_size = stream_Size( p_demux->s );
 779
 780 #ifdef AVFORMAT_DEBUG
 781     msg_Warn( p_demux, "IOSeek offset: %"PRId64", whence: %i", offset, whence );
 782 #endif
 783
 784     switch( whence )
 785     {
 786 #ifdef AVSEEK_SIZE
 787         case AVSEEK_SIZE:
 788             return i_size;
 789 #endif
 790         case SEEK_SET:
 791             i_absolute = (int64_t)offset;
 792             break;
 793         case SEEK_CUR:
 794             i_absolute = stream_Tell( p_demux->s ) + (int64_t)offset;
 795             break;
 796         case SEEK_END:
 797             i_absolute = i_size + (int64_t)offset;
 798             break;
 799         default:
 800             return -1;
 801
 802     }
 803
 804     if( i_absolute < 0 )
 805     {
 806         msg_Dbg( p_demux, "Trying to seek before the beginning" );
 807         return -1;
 808     }
 809
 810     if( i_size > 0 && i_absolute >= i_size )
 811     {
 812         msg_Dbg( p_demux, "Trying to seek too far : EOF?" );
 813         return -1;
 814     }
 815
 816     if( stream_Seek( p_demux->s, i_absolute ) )
 817     {
 818         msg_Warn( p_demux, "we were not allowed to seek, or EOF " );
 819         return -1;
 820     }
 821
 822     return stream_Tell( p_demux->s );
 823 }
 824
 825 #endif /* HAVE_LIBAVFORMAT_AVFORMAT_H */