git.sesse.net Git - vlc/blob - modules/demux/mp4/mp4.c

   1 /*****************************************************************************
   2  * mp4.c : MP4 file input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2004 VideoLAN
   5  * $Id$
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include <stdlib.h>                                      /* malloc(), free() */
  27
  28 #include <vlc/vlc.h>
  29 #include <vlc/input.h>
  30 #include <vlc_playlist.h>
  31 #include "iso_lang.h"
  32 #include "vlc_meta.h"
  33
  34 #include "libmp4.h"
  35 #include "drms.h"
  36
  37 /*****************************************************************************
  38  * Module descriptor
  39  *****************************************************************************/
  40 static int  Open ( vlc_object_t * );
  41 static void Close( vlc_object_t * );
  42
  43 vlc_module_begin();
  44     set_description( _("MP4 stream demuxer") );
  45     set_capability( "demux2", 242 );
  46     set_callbacks( Open, Close );
  47 vlc_module_end();
  48
  49 /*****************************************************************************
  50  * Local prototypes
  51  *****************************************************************************/
  52 static int    Demux   ( demux_t * );
  53 static int    DemuxRef( demux_t *p_demux )
  54 {
  55     return 0;
  56 }
  57 static int   Seek     ( demux_t *, mtime_t );
  58 static int   Control  ( demux_t *, int, va_list );
  59
  60 /* Contain all information about a chunk */
  61 typedef struct
  62 {
  63     uint64_t     i_offset; /* absolute position of this chunk in the file */
  64     uint32_t     i_sample_description_index; /* index for SampleEntry to use */
  65     uint32_t     i_sample_count; /* how many samples in this chunk */
  66     uint32_t     i_sample_first; /* index of the first sample in this chunk */
  67
  68     /* now provide way to calculate pts, dts, and offset without to
  69         much memory and with fast acces */
  70
  71     /* with this we can calculate dts/pts without waste memory */
  72     uint64_t     i_first_dts;
  73     uint32_t     *p_sample_count_dts;
  74     uint32_t     *p_sample_delta_dts; /* dts delta */
  75
  76     /* TODO if needed add pts
  77         but quickly *add* support for edts and seeking */
  78
  79 } mp4_chunk_t;
  80
  81
  82  /* Contain all needed information for read all track with vlc */
  83 typedef struct
  84 {
  85     int i_track_ID;     /* this should be unique */
  86
  87     int b_ok;           /* The track is usable */
  88     int b_enable;       /* is the trak enable by default */
  89     vlc_bool_t b_selected;     /* is the trak being played */
  90
  91     es_format_t fmt;
  92     es_out_id_t *p_es;
  93
  94     /* display size only ! */
  95     int i_width;
  96     int i_height;
  97
  98     /* more internal data */
  99     uint64_t        i_timescale;    /* time scale for this track only */
 100
 101     /* elst */
 102     int             i_elst;         /* current elst */
 103     int64_t         i_elst_time;    /* current elst start time (in movie time scale)*/
 104     MP4_Box_t       *p_elst;        /* elst (could be NULL) */
 105
 106     /* give the next sample to read, i_chunk is to find quickly where
 107       the sample is located */
 108     uint32_t         i_sample;       /* next sample to read */
 109     uint32_t         i_chunk;        /* chunk where next sample is stored */
 110     /* total count of chunk and sample */
 111     uint32_t         i_chunk_count;
 112     uint32_t         i_sample_count;
 113
 114     mp4_chunk_t    *chunk; /* always defined  for each chunk */
 115
 116     /* sample size, p_sample_size defined only if i_sample_size == 0
 117         else i_sample_size is size for all sample */
 118     uint32_t         i_sample_size;
 119     uint32_t         *p_sample_size; /* XXX perhaps add file offset if take
 120                                     too much time to do sumations each time*/
 121
 122     MP4_Box_t *p_stbl;  /* will contain all timing information */
 123     MP4_Box_t *p_stsd;  /* will contain all data to initialize decoder */
 124     MP4_Box_t *p_sample;/* point on actual sdsd */
 125
 126     vlc_bool_t b_drms;
 127     void      *p_drms;
 128
 129 } mp4_track_t;
 130
 131
 132 struct demux_sys_t
 133 {
 134     MP4_Box_t    *p_root;      /* container for the whole file */
 135
 136     mtime_t      i_pcr;
 137
 138     uint64_t     i_time;        /* time position of the presentation
 139                                  * in movie timescale */
 140     uint64_t     i_timescale;   /* movie time scale */
 141     uint64_t     i_duration;    /* movie duration */
 142     unsigned int i_tracks;      /* number of tracks */
 143     mp4_track_t *track;    /* array of track */
 144 };
 145
 146
 147 /*****************************************************************************
 148  * Declaration of local function
 149  *****************************************************************************/
 150 static void MP4_TrackCreate ( demux_t *, mp4_track_t *, MP4_Box_t  *);
 151 static void MP4_TrackDestroy( demux_t *, mp4_track_t * );
 152
 153 static int  MP4_TrackSelect ( demux_t *, mp4_track_t *, mtime_t );
 154 static void MP4_TrackUnselect(demux_t *, mp4_track_t * );
 155
 156 static int  MP4_TrackSeek   ( demux_t *, mp4_track_t *, mtime_t );
 157
 158 static uint64_t MP4_TrackGetPos    ( mp4_track_t * );
 159 static int      MP4_TrackSampleSize( mp4_track_t * );
 160 static int      MP4_TrackNextSample( demux_t *, mp4_track_t * );
 161 static void     MP4_TrackSetELST( demux_t *, mp4_track_t *, int64_t );
 162
 163 /* Return time in µs of a track */
 164 static inline int64_t MP4_TrackGetPTS( demux_t *p_demux, mp4_track_t *p_track )
 165 {
 166     unsigned int i_sample;
 167     unsigned int i_index;
 168     int64_t i_dts;
 169
 170     i_sample = p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first;
 171     i_dts = p_track->chunk[p_track->i_chunk].i_first_dts;
 172     i_index = 0;
 173     while( i_sample > 0 )
 174     {
 175         if( i_sample > p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index] )
 176         {
 177             i_dts += p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index] *
 178                         p_track->chunk[p_track->i_chunk].p_sample_delta_dts[i_index];
 179             i_sample -= p_track->chunk[p_track->i_chunk].p_sample_count_dts[i_index];
 180             i_index++;
 181         }
 182         else
 183         {
 184             i_dts += i_sample *
 185                         p_track->chunk[p_track->i_chunk].p_sample_delta_dts[i_index];
 186             i_sample = 0;
 187             break;
 188         }
 189     }
 190
 191     /* now handle elst */
 192     if( p_track->p_elst )
 193     {
 194         demux_sys_t         *p_sys = p_demux->p_sys;
 195         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
 196
 197         /* convert to offset */
 198         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
 199               elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
 200             elst->i_media_time[p_track->i_elst] > 0 )
 201         {
 202             i_dts -= elst->i_media_time[p_track->i_elst];
 203         }
 204
 205         /* add i_elst_time */
 206         i_dts += p_track->i_elst_time * p_track->i_timescale / p_sys->i_timescale;
 207
 208         if( i_dts < 0 ) i_dts = 0;
 209     }
 210
 211     return (int64_t)1000000 * i_dts / p_track->i_timescale;
 212 }
 213 static inline int64_t MP4_GetMoviePTS(demux_sys_t *p_sys )
 214 {
 215     return (int64_t)1000000 * p_sys->i_time / p_sys->i_timescale;
 216 }
 217
 218 #define FREE( p ) if( p ) { free( p ); (p) = NULL;}
 219
 220 /*****************************************************************************
 221  * Open: check file and initializes MP4 structures
 222  *****************************************************************************/
 223 static int Open( vlc_object_t * p_this )
 224 {
 225     demux_t  *p_demux = (demux_t *)p_this;
 226     demux_sys_t     *p_sys;
 227
 228     uint8_t         *p_peek;
 229
 230     MP4_Box_t       *p_ftyp;
 231     MP4_Box_t       *p_rmra;
 232     MP4_Box_t       *p_mvhd;
 233     MP4_Box_t       *p_trak;
 234
 235     unsigned int    i;
 236     vlc_bool_t      b_seekable;
 237
 238     /* a little test to see if it could be a mp4 */
 239     if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 )
 240     {
 241         msg_Warn( p_demux, "MP4 plugin discarded (cannot peek)" );
 242         return VLC_EGENERIC;
 243     }
 244     switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
 245     {
 246         case FOURCC_ftyp:
 247         case FOURCC_moov:
 248         case FOURCC_foov:
 249         case FOURCC_moof:
 250         case FOURCC_mdat:
 251         case FOURCC_udta:
 252         case FOURCC_free:
 253         case FOURCC_skip:
 254         case FOURCC_wide:
 255         case VLC_FOURCC( 'p', 'n', 'o', 't' ):
 256             break;
 257          default:
 258             msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
 259             return VLC_EGENERIC;
 260     }
 261
 262     /* I need to seek */
 263     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
 264     if( !b_seekable )
 265     {
 266         msg_Warn( p_demux, "MP4 plugin discarded (unseekable)" );
 267         return VLC_EGENERIC;
 268     }
 269
 270     /*Set exported functions */
 271     p_demux->pf_demux = Demux;
 272     p_demux->pf_control = Control;
 273
 274     /* create our structure that will contains all data */
 275     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 276     memset( p_sys, 0, sizeof( demux_sys_t ) );
 277
 278     /* Now load all boxes ( except raw data ) */
 279     if( ( p_sys->p_root = MP4_BoxGetRoot( p_demux->s ) ) == NULL )
 280     {
 281         msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
 282         goto error;
 283     }
 284
 285     MP4_BoxDumpStructure( p_demux->s, p_sys->p_root );
 286
 287     if( ( p_ftyp = MP4_BoxGet( p_sys->p_root, "/ftyp" ) ) )
 288     {
 289         switch( p_ftyp->data.p_ftyp->i_major_brand )
 290         {
 291             case( FOURCC_isom ):
 292                 msg_Dbg( p_demux,
 293                          "ISO Media file (isom) version %d.",
 294                          p_ftyp->data.p_ftyp->i_minor_version );
 295                 break;
 296             default:
 297                 msg_Dbg( p_demux,
 298                          "unrecognized major file specification (%4.4s).",
 299                           (char*)&p_ftyp->data.p_ftyp->i_major_brand );
 300                 break;
 301         }
 302     }
 303     else
 304     {
 305         msg_Dbg( p_demux, "file type box missing (assuming ISO Media file)" );
 306     }
 307
 308     /* the file need to have one moov box */
 309     if( MP4_BoxCount( p_sys->p_root, "/moov" ) <= 0 )
 310     {
 311         MP4_Box_t *p_foov = MP4_BoxGet( p_sys->p_root, "/foov" );
 312
 313         if( !p_foov )
 314         {
 315             msg_Err( p_demux, "MP4 plugin discarded (no moov box)" );
 316             goto error;
 317         }
 318         /* we have a free box as a moov, rename it */
 319         p_foov->i_type = FOURCC_moov;
 320     }
 321
 322     if( ( p_rmra = MP4_BoxGet( p_sys->p_root,  "/moov/rmra" ) ) )
 323     {
 324         playlist_t *p_playlist;
 325         int        i_count = MP4_BoxCount( p_rmra, "rmda" );
 326         int        i;
 327
 328         msg_Dbg( p_demux, "detected playlist mov file (%d ref)", i_count );
 329
 330         p_playlist =
 331             (playlist_t *)vlc_object_find( p_demux,
 332                                            VLC_OBJECT_PLAYLIST,
 333                                            FIND_ANYWHERE );
 334         if( p_playlist )
 335         {
 336             //p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
 337             for( i = 0; i < i_count; i++ )
 338             {
 339                 MP4_Box_t *p_rdrf = MP4_BoxGet( p_rmra, "rmda[%d]/rdrf", i );
 340                 char      *psz_ref;
 341                 uint32_t  i_ref_type;
 342
 343                 if( !p_rdrf || !( psz_ref = p_rdrf->data.p_rdrf->psz_ref ) )
 344                 {
 345                     continue;
 346                 }
 347                 i_ref_type = p_rdrf->data.p_rdrf->i_ref_type;
 348
 349                 msg_Dbg( p_demux, "new ref=`%s' type=%4.4s",
 350                          psz_ref, (char*)&i_ref_type );
 351
 352                 if( i_ref_type == VLC_FOURCC( 'u', 'r', 'l', ' ' ) )
 353                 {
 354                     if( strstr( psz_ref, "qt5gateQT" ) )
 355                     {
 356                         msg_Dbg( p_demux, "ignoring pseudo ref =`%s'", psz_ref );
 357                         continue;
 358                     }
 359                     if( !strncmp( psz_ref, "http://", 7 ) ||
 360                         !strncmp( psz_ref, "rtsp://", 7 ) )
 361                     {
 362                         msg_Dbg( p_demux, "adding ref = `%s'", psz_ref );
 363                         playlist_Add( p_playlist, psz_ref, psz_ref,
 364                                       PLAYLIST_APPEND, PLAYLIST_END );
 365                     }
 366                     else
 367                     {
 368                         /* msg dbg relative ? */
 369                         char *psz_absolute = alloca( strlen( p_demux->psz_path ) + strlen( psz_ref ) + 1);
 370                         char *end = strrchr( p_demux->psz_path, '/' );
 371
 372                         if( end )
 373                         {
 374                             int i_len = end + 1 - p_demux->psz_path;
 375
 376                             strncpy( psz_absolute, p_demux->psz_path, i_len);
 377                             psz_absolute[i_len] = '\0';
 378                         }
 379                         else
 380                         {
 381                             strcpy( psz_absolute, "" );
 382                         }
 383                         strcat( psz_absolute, psz_ref );
 384                         msg_Dbg( p_demux, "adding ref = `%s'", psz_absolute );
 385                         playlist_Add( p_playlist, psz_absolute, psz_absolute,
 386                                       PLAYLIST_APPEND, PLAYLIST_END );
 387                     }
 388                 }
 389                 else
 390                 {
 391                     msg_Err( p_demux, "unknown ref type=%4.4s FIXME (send a bug report)",
 392                              (char*)&p_rdrf->data.p_rdrf->i_ref_type );
 393                 }
 394             }
 395             vlc_object_release( p_playlist );
 396         }
 397         else
 398         {
 399             msg_Err( p_demux, "can't find playlist" );
 400         }
 401     }
 402
 403     if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) )
 404     {
 405         if( !p_rmra )
 406         {
 407             msg_Err( p_demux, "cannot find /moov/mvhd" );
 408             goto error;
 409         }
 410         else
 411         {
 412             msg_Warn( p_demux, "cannot find /moov/mvhd (pure ref file)" );
 413             p_demux->pf_demux = DemuxRef;
 414             return VLC_SUCCESS;
 415         }
 416     }
 417     else
 418     {
 419         p_sys->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 420         p_sys->i_duration = p_mvhd->data.p_mvhd->i_duration;
 421     }
 422
 423     if( !( p_sys->i_tracks = MP4_BoxCount( p_sys->p_root, "/moov/trak" ) ) )
 424     {
 425         msg_Err( p_demux, "cannot find any /moov/trak" );
 426         goto error;
 427     }
 428     msg_Dbg( p_demux, "find %d track%c",
 429                         p_sys->i_tracks,
 430                         p_sys->i_tracks ? 's':' ' );
 431
 432     /* allocate memory */
 433     p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
 434     memset( p_sys->track, 0, p_sys->i_tracks * sizeof( mp4_track_t ) );
 435
 436     /* now process each track and extract all usefull informations */
 437     for( i = 0; i < p_sys->i_tracks; i++ )
 438     {
 439         p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 440         MP4_TrackCreate( p_demux, &p_sys->track[i], p_trak );
 441
 442         if( p_sys->track[i].b_ok )
 443         {
 444             char *psz_cat;
 445             switch( p_sys->track[i].fmt.i_cat )
 446             {
 447                 case( VIDEO_ES ):
 448                     psz_cat = "video";
 449                     break;
 450                 case( AUDIO_ES ):
 451                     psz_cat = "audio";
 452                     break;
 453                 case( SPU_ES ):
 454                     psz_cat = "subtitle";
 455                     break;
 456
 457                 default:
 458                     psz_cat = "unknown";
 459                     break;
 460             }
 461
 462             msg_Dbg( p_demux, "adding track[Id 0x%x] %s (%s) language %s",
 463                             p_sys->track[i].i_track_ID,
 464                             psz_cat,
 465                             p_sys->track[i].b_enable ? "enable":"disable",
 466                             p_sys->track[i].fmt.psz_language ? p_sys->track[i].fmt.psz_language : "undef" );
 467         }
 468         else
 469         {
 470             msg_Dbg( p_demux, "ignoring track[Id 0x%x]", p_sys->track[i].i_track_ID );
 471         }
 472
 473     }
 474     return VLC_SUCCESS;
 475
 476 error:
 477     if( p_sys->p_root )
 478     {
 479         MP4_BoxFree( p_demux->s, p_sys->p_root );
 480     }
 481     free( p_sys );
 482     return VLC_EGENERIC;
 483 }
 484
 485 /*****************************************************************************
 486  * Demux: read packet and send them to decoders
 487  *****************************************************************************
 488  * TODO check for newly selected track (ie audio upt to now )
 489  *****************************************************************************/
 490 static int Demux( demux_t *p_demux )
 491 {
 492     demux_sys_t *p_sys = p_demux->p_sys;
 493     unsigned int i_track;
 494
 495
 496     unsigned int i_track_selected;
 497
 498     /* check for newly selected/unselected track */
 499     for( i_track = 0, i_track_selected = 0; i_track <  p_sys->i_tracks; i_track++ )
 500     {
 501         mp4_track_t *tk = &p_sys->track[i_track];
 502
 503         if( tk->b_selected && tk->i_sample >= tk->i_sample_count )
 504         {
 505             msg_Warn( p_demux, "track[0x%x] will be disabled", tk->i_track_ID );
 506             MP4_TrackUnselect( p_demux, tk);
 507         }
 508         else if( tk->b_ok )
 509         {
 510             vlc_bool_t b;
 511             es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 512
 513             if( tk->b_selected && !b )
 514             {
 515                 MP4_TrackUnselect( p_demux, tk );
 516             }
 517             else if( !tk->b_selected && b)
 518             {
 519                 MP4_TrackSelect( p_demux, tk, MP4_GetMoviePTS( p_sys ) );
 520             }
 521
 522             if( tk->b_selected )
 523             {
 524                 i_track_selected++;
 525             }
 526         }
 527     }
 528
 529     if( i_track_selected <= 0 )
 530     {
 531         msg_Warn( p_demux, "no track selected, exiting..." );
 532         return 0;
 533     }
 534
 535     /* first wait for the good time to read a packet */
 536     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr + 1 );
 537
 538     p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
 539
 540     /* we will read 100ms for each stream so ...*/
 541     p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 542
 543     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 544     {
 545         mp4_track_t *tk = &p_sys->track[i_track];
 546
 547         if( !tk->b_ok || !tk->b_selected )
 548         {
 549             continue;
 550         }
 551
 552         while( MP4_TrackGetPTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
 553         {
 554 #if 0
 555             msg_Dbg( p_demux, "tk=%lld mv=%lld",
 556                      MP4_TrackGetPTS( p_demux, tk ),
 557                      MP4_GetMoviePTS( p_sys ) );
 558 #endif
 559
 560             if( MP4_TrackSampleSize( tk ) > 0 )
 561             {
 562                 block_t *p_block;
 563
 564                 /* go,go go ! */
 565                 if( stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
 566                 {
 567                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
 568                     MP4_TrackUnselect( p_demux, tk );
 569                     break;
 570                 }
 571
 572                 /* now read pes */
 573                 if( ( p_block = stream_Block( p_demux->s,
 574                                               MP4_TrackSampleSize( tk ) ) ) == NULL )
 575                 {
 576                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
 577                     MP4_TrackUnselect( p_demux, tk );
 578                     break;
 579                 }
 580
 581                 if( tk->b_drms && tk->p_drms )
 582                 {
 583                     drms_decrypt( tk->p_drms,
 584                                   (uint32_t*)p_block->p_buffer,
 585                                   p_block->i_buffer );
 586                 }
 587                 else if( tk->fmt.i_cat == SPU_ES && p_block->i_buffer >= 2 )
 588                 {
 589                     uint16_t i_size = GetWBE( p_block->p_buffer );
 590
 591                     if( i_size + 2 <= p_block->i_buffer )
 592                     {
 593                         char *p;
 594                         /* remove the length field, and append a '\0' */
 595                         memmove( &p_block->p_buffer[0], &p_block->p_buffer[2], i_size );
 596                         p_block->p_buffer[i_size] = '\0';
 597                         p_block->i_buffer = i_size + 1;
 598
 599                         /* convert \r -> \n */
 600                         while( ( p = strchr( p_block->p_buffer, '\r' ) ) )
 601                         {
 602                             *p = '\n';
 603                         }
 604                     }
 605                     else
 606                     {
 607                         /* Invalid */
 608                         p_block->i_buffer = 0;
 609                     }
 610                 }
 611                 p_block->i_dts = MP4_TrackGetPTS( p_demux, tk ) + 1;
 612
 613                 p_block->i_pts = tk->fmt.i_cat == VIDEO_ES ? 0 : p_block->i_dts + 1;
 614
 615                 if( !tk->b_drms || ( tk->b_drms && tk->p_drms ) )
 616                 {
 617                     es_out_Send( p_demux->out, tk->p_es, p_block );
 618                 }
 619             }
 620
 621             /* Next sample */
 622             if( MP4_TrackNextSample( p_demux, tk ) )
 623             {
 624                 break;
 625             }
 626         }
 627     }
 628
 629     return 1;
 630 }
 631 /*****************************************************************************
 632  * Seek: Got to i_date
 633  ******************************************************************************/
 634 static int   Seek     ( demux_t *p_demux, mtime_t i_date )
 635 {
 636     demux_sys_t *p_sys = p_demux->p_sys;
 637     unsigned int i_track;
 638
 639     /* First update update global time */
 640     p_sys->i_time = i_date * p_sys->i_timescale / 1000000;
 641     p_sys->i_pcr  = i_date;
 642
 643     /* Now for each stream try to go to this time */
 644     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 645     {
 646         mp4_track_t *tk = &p_sys->track[i_track];
 647
 648         if( tk->b_ok && tk->b_selected )
 649         {
 650             MP4_TrackSeek( p_demux, tk, i_date );
 651         }
 652     }
 653     return( 1 );
 654 }
 655
 656 /*****************************************************************************
 657  * Control:
 658  *****************************************************************************/
 659 static int Control( demux_t *p_demux, int i_query, va_list args )
 660 {
 661     demux_sys_t *p_sys = p_demux->p_sys;
 662
 663     double f, *pf;
 664     int64_t i64, *pi64;
 665
 666     switch( i_query )
 667     {
 668         case DEMUX_GET_POSITION:
 669             pf = (double*)va_arg( args, double * );
 670             if( p_sys->i_duration > 0 )
 671             {
 672                 *pf = (double)p_sys->i_time / (double)p_sys->i_duration;
 673             }
 674             else
 675             {
 676                 *pf = 0.0;
 677             }
 678             return VLC_SUCCESS;
 679
 680         case DEMUX_SET_POSITION:
 681             f = (double)va_arg( args, double );
 682             if( p_sys->i_timescale > 0 )
 683             {
 684                 i64 = (int64_t)( f * (double)1000000 *
 685                                  (double)p_sys->i_duration /
 686                                  (double)p_sys->i_timescale );
 687                 return Seek( p_demux, i64 );
 688             }
 689             else return VLC_SUCCESS;
 690
 691         case DEMUX_GET_TIME:
 692             pi64 = (int64_t*)va_arg( args, int64_t * );
 693             if( p_sys->i_timescale > 0 )
 694             {
 695                 *pi64 = (mtime_t)1000000 *
 696                         (mtime_t)p_sys->i_time /
 697                         (mtime_t)p_sys->i_timescale;
 698             }
 699             else *pi64 = 0;
 700             return VLC_SUCCESS;
 701
 702         case DEMUX_SET_TIME:
 703             i64 = (int64_t)va_arg( args, int64_t );
 704             return Seek( p_demux, i64 );
 705
 706         case DEMUX_GET_LENGTH:
 707             pi64 = (int64_t*)va_arg( args, int64_t * );
 708             if( p_sys->i_timescale > 0 )
 709             {
 710                 *pi64 = (mtime_t)1000000 *
 711                         (mtime_t)p_sys->i_duration /
 712                         (mtime_t)p_sys->i_timescale;
 713             }
 714             else *pi64 = 0;
 715             return VLC_SUCCESS;
 716
 717         case DEMUX_GET_FPS:
 718             msg_Warn( p_demux, "DEMUX_GET_FPS unimplemented !!" );
 719             return VLC_EGENERIC;
 720
 721         case DEMUX_GET_META:
 722         {
 723             vlc_meta_t **pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
 724             vlc_meta_t *meta;
 725             MP4_Box_t  *p_udta   = MP4_BoxGet( p_sys->p_root, "/moov/udta" );
 726             MP4_Box_t  *p_0xa9xxx;
 727             if( p_udta == NULL )
 728             {
 729                 return VLC_EGENERIC;
 730             }
 731             *pp_meta = meta = vlc_meta_New();
 732             for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
 733                  p_0xa9xxx = p_0xa9xxx->p_next )
 734             {
 735                 switch( p_0xa9xxx->i_type )
 736                 {
 737                 case FOURCC_0xa9nam:
 738                     vlc_meta_Add( meta, VLC_META_TITLE,
 739                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 740                     break;
 741                 case FOURCC_0xa9aut:
 742                     vlc_meta_Add( meta, VLC_META_AUTHOR,
 743                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 744                     break;
 745                 case FOURCC_0xa9ART:
 746                     vlc_meta_Add( meta, VLC_META_ARTIST,
 747                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 748                     break;
 749                 case FOURCC_0xa9cpy:
 750                     vlc_meta_Add( meta, VLC_META_COPYRIGHT,
 751                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 752                     break;
 753                 case FOURCC_0xa9day:
 754                     vlc_meta_Add( meta, VLC_META_DATE,
 755                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 756                     break;
 757                 case FOURCC_0xa9des:
 758                     vlc_meta_Add( meta, VLC_META_DESCRIPTION,
 759                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 760                     break;
 761
 762                 case FOURCC_0xa9swr:
 763                 case FOURCC_0xa9inf:
 764                 case FOURCC_0xa9dir:
 765                 case FOURCC_0xa9cmt:
 766                 case FOURCC_0xa9req:
 767                 case FOURCC_0xa9fmt:
 768                 case FOURCC_0xa9prd:
 769                 case FOURCC_0xa9prf:
 770                 case FOURCC_0xa9src:
 771                     /* TODO one day, but they aren't really meaningfull */
 772                     break;
 773
 774                 default:
 775                     break;
 776                 }
 777             }
 778             return VLC_SUCCESS;
 779         }
 780
 781         default:
 782             msg_Err( p_demux, "control query unimplemented !!!" );
 783             return VLC_EGENERIC;
 784     }
 785 }
 786
 787 /*****************************************************************************
 788  * Close: frees unused data
 789  *****************************************************************************/
 790 static void Close ( vlc_object_t * p_this )
 791 {
 792     unsigned int i_track;
 793     demux_t *  p_demux = (demux_t *)p_this;
 794     demux_sys_t *p_sys = p_demux->p_sys;
 795
 796     msg_Dbg( p_demux, "freeing all memory" );
 797
 798     MP4_BoxFree( p_demux->s, p_sys->p_root );
 799     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 800     {
 801         MP4_TrackDestroy( p_demux, &p_sys->track[i_track] );
 802     }
 803     FREE( p_sys->track );
 804
 805     free( p_sys );
 806 }
 807
 808
 809
 810 /****************************************************************************
 811  * Local functions, specific to vlc
 812  ****************************************************************************/
 813
 814 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
 815 static int TrackCreateChunksIndex( demux_t *p_demux,
 816                                    mp4_track_t *p_demux_track )
 817 {
 818     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
 819     MP4_Box_t *p_stsc;
 820
 821     unsigned int i_chunk;
 822     unsigned int i_index, i_last;
 823
 824     if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
 825           !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )||
 826         ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
 827     {
 828         return( VLC_EGENERIC );
 829     }
 830
 831     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
 832     if( !p_demux_track->i_chunk_count )
 833     {
 834         msg_Warn( p_demux, "no chunk defined" );
 835         return( VLC_EGENERIC );
 836     }
 837     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
 838                                    sizeof( mp4_chunk_t ) );
 839
 840     /* first we read chunk offset */
 841     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 842     {
 843         p_demux_track->chunk[i_chunk].i_offset =
 844                 p_co64->data.p_co64->i_chunk_offset[i_chunk];
 845     }
 846
 847     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
 848         to be used for the sample XXX begin to 1
 849         We construct it begining at the end */
 850     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
 851     i_index = p_stsc->data.p_stsc->i_entry_count;
 852     if( !i_index )
 853     {
 854         msg_Warn( p_demux, "cannot read chunk table or table empty" );
 855         return( VLC_EGENERIC );
 856     }
 857
 858     while( i_index )
 859     {
 860         i_index--;
 861         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 862                 i_chunk < i_last; i_chunk++ )
 863         {
 864             p_demux_track->chunk[i_chunk].i_sample_description_index =
 865                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
 866             p_demux_track->chunk[i_chunk].i_sample_count =
 867                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
 868         }
 869         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 870     }
 871
 872     p_demux_track->chunk[0].i_sample_first = 0;
 873     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 874     {
 875         p_demux_track->chunk[i_chunk].i_sample_first =
 876             p_demux_track->chunk[i_chunk-1].i_sample_first +
 877                 p_demux_track->chunk[i_chunk-1].i_sample_count;
 878     }
 879
 880     msg_Dbg( p_demux,
 881              "track[Id 0x%x] read %d chunk",
 882              p_demux_track->i_track_ID,
 883              p_demux_track->i_chunk_count );
 884
 885     return( VLC_SUCCESS );
 886 }
 887 static int TrackCreateSamplesIndex( demux_t *p_demux,
 888                                     mp4_track_t *p_demux_track )
 889 {
 890     MP4_Box_t *p_stts; /* makes mapping between sample and decoding time,
 891                           ctts make same mapping but for composition time,
 892                           not yet used and probably not usefull */
 893     MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2
 894                           that uses a compressed form FIXME make them in libmp4
 895                           as a unique type */
 896     /* TODO use also stss and stsh table for seeking */
 897     /* FIXME use edit table */
 898     int64_t i_sample;
 899     int64_t i_chunk;
 900
 901     int64_t i_index;
 902     int64_t i_index_sample_used;
 903
 904     int64_t i_last_dts;
 905
 906     p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
 907     p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
 908
 909     if( ( !p_stts )||( !p_stsz ) )
 910     {
 911         msg_Warn( p_demux, "cannot read sample table" );
 912         return( VLC_EGENERIC );
 913     }
 914
 915     p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count;
 916
 917
 918     /* for sample size, there are 2 case */
 919     if( p_stsz->data.p_stsz->i_sample_size )
 920     {
 921         /* 1: all sample have the same size, so no need to construct a table */
 922         p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size;
 923         p_demux_track->p_sample_size = NULL;
 924     }
 925     else
 926     {
 927         /* 2: each sample can have a different size */
 928         p_demux_track->i_sample_size = 0;
 929         p_demux_track->p_sample_size =
 930             calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
 931
 932         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
 933         {
 934             p_demux_track->p_sample_size[i_sample] =
 935                     p_stsz->data.p_stsz->i_entry_size[i_sample];
 936         }
 937     }
 938     /* we have extract all information from stsz,
 939         now use stts */
 940
 941     /* if we don't want to waste too much memory, we can't expand
 942        the box !, so each chunk will contain an "extract" of this table
 943        for fast research */
 944
 945     i_last_dts = 0;
 946     i_index = 0; i_index_sample_used =0;
 947
 948     /* create and init last data for each chunk */
 949     for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 950     {
 951
 952         int64_t i_entry, i_sample_count, i;
 953         /* save last dts */
 954         p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts;
 955     /* count how many entries needed for this chunk
 956        for p_sample_delta_dts and p_sample_count_dts */
 957
 958         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 959
 960         i_entry = 0;
 961         while( i_sample_count > 0 )
 962         {
 963             i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry];
 964             if( i_entry == 0 )
 965             {
 966                 i_sample_count += i_index_sample_used; /* don't count already used sample
 967                                                    int this entry */
 968             }
 969             i_entry++;
 970         }
 971
 972         /* allocate them */
 973         p_demux_track->chunk[i_chunk].p_sample_count_dts =
 974             calloc( i_entry, sizeof( uint32_t ) );
 975         p_demux_track->chunk[i_chunk].p_sample_delta_dts =
 976             calloc( i_entry, sizeof( uint32_t ) );
 977
 978         /* now copy */
 979         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 980         for( i = 0; i < i_entry; i++ )
 981         {
 982             int64_t i_used;
 983             int64_t i_rest;
 984
 985             i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used;
 986
 987             i_used = __MIN( i_rest, i_sample_count );
 988
 989             i_index_sample_used += i_used;
 990             i_sample_count -= i_used;
 991
 992             p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used;
 993
 994             p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] =
 995                         p_stts->data.p_stts->i_sample_delta[i_index];
 996
 997             i_last_dts += i_used *
 998                     p_demux_track->chunk[i_chunk].p_sample_delta_dts[i];
 999
1000             if( i_index_sample_used >=
1001                              p_stts->data.p_stts->i_sample_count[i_index] )
1002             {
1003
1004                 i_index++;
1005                 i_index_sample_used = 0;
1006             }
1007         }
1008
1009     }
1010
1011     msg_Dbg( p_demux,
1012              "track[Id 0x%x] read %d samples length:"I64Fd"s",
1013              p_demux_track->i_track_ID,
1014              p_demux_track->i_sample_count,
1015              i_last_dts / p_demux_track->i_timescale );
1016
1017     return( VLC_SUCCESS );
1018 }
1019
1020 /*
1021  * TrackCreateES:
1022  *  Create ES and PES to init decoder if needed, for a track starting at i_chunk
1023  */
1024 static int  TrackCreateES   ( demux_t   *p_demux,
1025                               mp4_track_t *p_track,
1026                               unsigned int     i_chunk,
1027                               es_out_id_t      **pp_es )
1028 {
1029     MP4_Box_t   *p_sample;
1030     MP4_Box_t   *p_esds;
1031
1032     *pp_es = NULL;
1033
1034     if( !p_track->chunk[i_chunk].i_sample_description_index )
1035     {
1036         msg_Warn( p_demux,
1037                   "invalid SampleEntry index (track[Id 0x%x])",
1038                   p_track->i_track_ID );
1039         return VLC_EGENERIC;
1040     }
1041
1042     p_sample = MP4_BoxGet(  p_track->p_stsd, "[%d]",
1043                 p_track->chunk[i_chunk].i_sample_description_index - 1 );
1044
1045     if( !p_sample || !p_sample->data.p_data )
1046     {
1047         msg_Warn( p_demux,
1048                   "cannot find SampleEntry (track[Id 0x%x])",
1049                   p_track->i_track_ID );
1050         return( VLC_EGENERIC );
1051     }
1052
1053     p_track->p_sample = p_sample;
1054
1055     if( p_track->i_sample_size == 1 )
1056     {
1057         MP4_Box_data_sample_soun_t *p_soun;
1058
1059         p_soun = p_sample->data.p_sample_soun;
1060
1061         if( p_soun->i_qt_version == 0 )
1062         {
1063             switch( p_sample->i_type )
1064             {
1065                 case VLC_FOURCC( 'i', 'm', 'a', '4' ):
1066                     p_soun->i_qt_version = 1;
1067                     p_soun->i_sample_per_packet = 64;
1068                     p_soun->i_bytes_per_packet  = 34;
1069                     p_soun->i_bytes_per_frame   = 34 * p_soun->i_channelcount;
1070                     p_soun->i_bytes_per_sample  = 2;
1071                     break;
1072                 case VLC_FOURCC( 'M', 'A', 'C', '3' ):
1073                     p_soun->i_qt_version = 1;
1074                     p_soun->i_sample_per_packet = 6;
1075                     p_soun->i_bytes_per_packet  = 2;
1076                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1077                     p_soun->i_bytes_per_sample  = 2;
1078                     break;
1079                 case VLC_FOURCC( 'M', 'A', 'C', '6' ):
1080                     p_soun->i_qt_version = 1;
1081                     p_soun->i_sample_per_packet = 12;
1082                     p_soun->i_bytes_per_packet  = 2;
1083                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1084                     p_soun->i_bytes_per_sample  = 2;
1085                     break;
1086                 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
1087                 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
1088                     p_soun->i_samplesize = 8;
1089                     break;
1090                 default:
1091                     break;
1092             }
1093
1094         }
1095         else if( p_soun->i_qt_version == 1 && p_soun->i_sample_per_packet <= 0 )
1096         {
1097             p_soun->i_qt_version = 0;
1098         }
1099     }
1100
1101
1102     /* It's a little ugly but .. there are special cases */
1103     switch( p_sample->i_type )
1104     {
1105         case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
1106         case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
1107             p_track->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
1108             break;
1109         case( VLC_FOURCC( 'r', 'a', 'w', ' ' ) ):
1110             p_track->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
1111             break;
1112         case( VLC_FOURCC( 's', '2', '6', '3' ) ):
1113             p_track->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '3' );
1114             break;
1115
1116         case( VLC_FOURCC( 't', 'e', 'x', 't' ) ):
1117             p_track->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
1118             /* FIXME: Not true, could be UTF-16 with a Byte Order Mark (0xfeff) */
1119             /* FIXME UTF-8 doesn't work here ? */
1120             /* p_track->fmt.subs.psz_encoding = strdup( "UTF-8" ); */
1121             break;
1122
1123         default:
1124             p_track->fmt.i_codec = p_sample->i_type;
1125             break;
1126     }
1127
1128     /* now see if esds is present and if so create a data packet
1129         with decoder_specific_info  */
1130 #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
1131     if( ( ( p_esds = MP4_BoxGet( p_sample, "esds" ) ) ||
1132           ( p_esds = MP4_BoxGet( p_sample, "wave/esds" ) ) )&&
1133         ( p_esds->data.p_esds )&&
1134         ( p_decconfig ) )
1135     {
1136         /* First update information based on i_objectTypeIndication */
1137         switch( p_decconfig->i_objectTypeIndication )
1138         {
1139             case( 0x20 ): /* MPEG4 VIDEO */
1140                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','v' );
1141                 break;
1142             case( 0x40):
1143                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1144                 break;
1145             case( 0x60):
1146             case( 0x61):
1147             case( 0x62):
1148             case( 0x63):
1149             case( 0x64):
1150             case( 0x65): /* MPEG2 video */
1151                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1152                 break;
1153             /* Theses are MPEG2-AAC */
1154             case( 0x66): /* main profile */
1155             case( 0x67): /* Low complexity profile */
1156             case( 0x68): /* Scaleable Sampling rate profile */
1157                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1158                 break;
1159             /* true MPEG 2 audio */
1160             case( 0x69):
1161                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1162                 break;
1163             case( 0x6a): /* MPEG1 video */
1164                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1165                 break;
1166             case( 0x6b): /* MPEG1 audio */
1167                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1168                 break;
1169             case( 0x6c ): /* jpeg */
1170                 p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' );
1171                 break;
1172             default:
1173                 /* Unknown entry, but don't touch i_fourcc */
1174                 msg_Warn( p_demux,
1175                           "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])",
1176                           p_decconfig->i_objectTypeIndication,
1177                           p_track->i_track_ID );
1178                 break;
1179         }
1180         p_track->fmt.i_extra = p_decconfig->i_decoder_specific_info_len;
1181         if( p_track->fmt.i_extra > 0 )
1182         {
1183             p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1184             memcpy( p_track->fmt.p_extra, p_decconfig->p_decoder_specific_info,
1185                     p_track->fmt.i_extra );
1186         }
1187     }
1188     else
1189     {
1190         switch( p_sample->i_type )
1191         {
1192             /* qt decoder, send the complete chunk */
1193             case VLC_FOURCC( 'S', 'V', 'Q', '3' ):
1194             case VLC_FOURCC( 'S', 'V', 'Q', '1' ):
1195             case VLC_FOURCC( 'V', 'P', '3', '1' ):
1196             case VLC_FOURCC( '3', 'I', 'V', '1' ):
1197             case VLC_FOURCC( 'Z', 'y', 'G', 'o' ):
1198                 p_track->fmt.i_extra =
1199                     p_sample->data.p_sample_vide->i_qt_image_description;
1200                 if( p_track->fmt.i_extra > 0 )
1201                 {
1202                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1203                     memcpy( p_track->fmt.p_extra,
1204                             p_sample->data.p_sample_vide->p_qt_image_description,
1205                             p_track->fmt.i_extra);
1206                 }
1207                 break;
1208             case VLC_FOURCC( 'Q', 'D', 'M', 'C' ):
1209             case VLC_FOURCC( 'Q', 'D', 'M', '2' ):
1210             case VLC_FOURCC( 'Q', 'c', 'l', 'p' ):
1211             case VLC_FOURCC( 's', 'a', 'm', 'r' ):
1212                 p_track->fmt.i_extra =
1213                     p_sample->data.p_sample_soun->i_qt_description;
1214                 if( p_track->fmt.i_extra > 0 )
1215                 {
1216                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1217                     memcpy( p_track->fmt.p_extra,
1218                             p_sample->data.p_sample_soun->p_qt_description,
1219                             p_track->fmt.i_extra);
1220                 }
1221                 break;
1222
1223             /* avc1: send avcC (h264 without annexe B, ie without start code)*/
1224             case VLC_FOURCC( 'a', 'v', 'c', '1' ):
1225             {
1226                 MP4_Box_t *p_avcC = MP4_BoxGet( p_sample, "avcC" );
1227
1228                 if( p_avcC )
1229                 {
1230                     /* Hack: use a packetizer to reecampsulate data in anexe B format */
1231                     msg_Dbg( p_demux, "avcC: size=%d", p_avcC->data.p_avcC->i_avcC );
1232                     p_track->fmt.i_extra = p_avcC->data.p_avcC->i_avcC;
1233                     p_track->fmt.p_extra = malloc( p_avcC->data.p_avcC->i_avcC );
1234                     memcpy( p_track->fmt.p_extra, p_avcC->data.p_avcC->p_avcC, p_track->fmt.i_extra );
1235                     p_track->fmt.b_packetized = VLC_FALSE;
1236                 }
1237                 else
1238                 {
1239                     msg_Err( p_demux, "missing avcC" );
1240                 }
1241                 break;
1242             }
1243
1244             default:
1245                 break;
1246         }
1247     }
1248
1249 #undef p_decconfig
1250
1251     /* some last initialisation */
1252     switch( p_track->fmt.i_cat )
1253     {
1254     case( VIDEO_ES ):
1255         p_track->fmt.video.i_width = p_sample->data.p_sample_vide->i_width;
1256         p_track->fmt.video.i_height = p_sample->data.p_sample_vide->i_height;
1257
1258         /* fall on display size */
1259         if( p_track->fmt.video.i_width <= 0 )
1260             p_track->fmt.video.i_width = p_track->i_width;
1261         if( p_track->fmt.video.i_height <= 0 )
1262             p_track->fmt.video.i_height = p_track->i_height;
1263
1264         /* Find out apect ratio from display size */
1265         if( p_track->i_width > 0 && p_track->i_height > 0 &&
1266             /* Work-around buggy muxed files */
1267             p_sample->data.p_sample_vide->i_width != p_track->i_width )
1268             p_track->fmt.video.i_aspect =
1269                 VOUT_ASPECT_FACTOR * p_track->i_width / p_track->i_height;
1270
1271         break;
1272
1273     case( AUDIO_ES ):
1274         p_track->fmt.audio.i_channels =
1275             p_sample->data.p_sample_soun->i_channelcount;
1276         p_track->fmt.audio.i_rate =
1277             p_sample->data.p_sample_soun->i_sampleratehi;
1278         p_track->fmt.i_bitrate = p_sample->data.p_sample_soun->i_channelcount *
1279             p_sample->data.p_sample_soun->i_sampleratehi *
1280                 p_sample->data.p_sample_soun->i_samplesize;
1281         p_track->fmt.audio.i_bitspersample =
1282             p_sample->data.p_sample_soun->i_samplesize;
1283         break;
1284
1285     default:
1286         break;
1287     }
1288
1289     *pp_es = es_out_Add( p_demux->out, &p_track->fmt );
1290
1291     return VLC_SUCCESS;
1292 }
1293
1294 /* given a time it return sample/chunk
1295  * it also update elst field of the track
1296  */
1297 static int  TrackTimeToSampleChunk( demux_t *p_demux,
1298                                     mp4_track_t *p_track,
1299                                     int64_t i_start,
1300                                     uint32_t *pi_chunk,
1301                                     uint32_t *pi_sample )
1302 {
1303     demux_sys_t *p_sys = p_demux->p_sys;
1304     MP4_Box_t   *p_stss;
1305     uint64_t     i_dts;
1306     unsigned int i_sample;
1307     unsigned int i_chunk;
1308     int          i_index;
1309
1310     /* FIXME see if it's needed to check p_track->i_chunk_count */
1311     if( !p_track->b_ok || p_track->i_chunk_count == 0 )
1312     {
1313         return( VLC_EGENERIC );
1314     }
1315
1316     /* handle elst (find the correct one) */
1317     MP4_TrackSetELST( p_demux, p_track, i_start );
1318     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1319     {
1320         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1321         int64_t i_mvt= i_start * p_sys->i_timescale / (int64_t)1000000;
1322
1323         /* now calculate i_start for this elst */
1324         /* offset */
1325         i_start -= p_track->i_elst_time * (int64_t)1000000 / p_sys->i_timescale;
1326         if( i_start < 0 )
1327         {
1328             *pi_chunk = 0;
1329             *pi_sample= 0;
1330
1331             return VLC_SUCCESS;
1332         }
1333         /* to track time scale */
1334         i_start  = i_start * p_track->i_timescale / (int64_t)1000000;
1335         /* add elst offset */
1336         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
1337              elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
1338             elst->i_media_time[p_track->i_elst] > 0 )
1339         {
1340             i_start += elst->i_media_time[p_track->i_elst];
1341         }
1342
1343         msg_Dbg( p_demux, "elst (%d) gives "I64Fd"ms (movie)-> "I64Fd"ms (track)",
1344                  p_track->i_elst,
1345                  i_mvt * 1000 / p_sys->i_timescale,
1346                  i_start * 1000 / p_track->i_timescale );
1347     }
1348     else
1349     {
1350         /* convert absolute time to in timescale unit */
1351         i_start = i_start * p_track->i_timescale / (int64_t)1000000;
1352     }
1353
1354     /* we start from sample 0/chunk 0, hope it won't take too much time */
1355     /* *** find good chunk *** */
1356     for( i_chunk = 0; ; i_chunk++ )
1357     {
1358         if( i_chunk + 1 >= p_track->i_chunk_count )
1359         {
1360             /* at the end and can't check if i_start in this chunk,
1361                it will be check while searching i_sample */
1362             i_chunk = p_track->i_chunk_count - 1;
1363             break;
1364         }
1365
1366         if( i_start >= p_track->chunk[i_chunk].i_first_dts &&
1367             i_start <  p_track->chunk[i_chunk + 1].i_first_dts )
1368         {
1369             break;
1370         }
1371     }
1372
1373     /* *** find sample in the chunk *** */
1374     i_sample = p_track->chunk[i_chunk].i_sample_first;
1375     i_dts    = p_track->chunk[i_chunk].i_first_dts;
1376     for( i_index = 0; i_sample < p_track->chunk[i_chunk].i_sample_count; )
1377     {
1378         if( i_dts +
1379             p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1380             p_track->chunk[i_chunk].p_sample_delta_dts[i_index] < i_start )
1381         {
1382             i_dts    +=
1383                 p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1384                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1385
1386             i_sample += p_track->chunk[i_chunk].p_sample_count_dts[i_index];
1387             i_index++;
1388         }
1389         else
1390         {
1391             if( p_track->chunk[i_chunk].p_sample_delta_dts[i_index] <= 0 )
1392             {
1393                 break;
1394             }
1395             i_sample += ( i_start - i_dts ) / p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1396             break;
1397         }
1398     }
1399
1400     if( i_sample >= p_track->i_sample_count )
1401     {
1402         msg_Warn( p_demux,
1403                   "track[Id 0x%x] will be disabled (seeking too far) chunk=%d sample=%d",
1404                   p_track->i_track_ID, i_chunk, i_sample );
1405         return( VLC_EGENERIC );
1406     }
1407
1408
1409     /* *** Try to find nearest sync points *** */
1410     if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
1411     {
1412         unsigned int i_index;
1413         msg_Dbg( p_demux,
1414                     "track[Id 0x%x] using Sync Sample Box (stss)",
1415                     p_track->i_track_ID );
1416         for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
1417         {
1418             if( p_stss->data.p_stss->i_sample_number[i_index] >= i_sample )
1419             {
1420                 if( i_index > 0 )
1421                 {
1422                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1423                             i_sample,
1424                             p_stss->data.p_stss->i_sample_number[i_index-1] );
1425                     i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
1426                     /* new i_sample is less than old so i_chunk can only decreased */
1427                     while( i_chunk > 0 &&
1428                             i_sample < p_track->chunk[i_chunk].i_sample_first )
1429                     {
1430                         i_chunk--;
1431                     }
1432                 }
1433                 else
1434                 {
1435                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1436                             i_sample,
1437                             p_stss->data.p_stss->i_sample_number[i_index] );
1438                     i_sample = p_stss->data.p_stss->i_sample_number[i_index];
1439                     /* new i_sample is more than old so i_chunk can only increased */
1440                     while( i_chunk < p_track->i_chunk_count - 1 &&
1441                            i_sample >= p_track->chunk[i_chunk].i_sample_first +
1442                                                 p_track->chunk[i_chunk].i_sample_count )
1443                     {
1444                         i_chunk++;
1445                     }
1446                 }
1447                 break;
1448             }
1449         }
1450     }
1451     else
1452     {
1453         msg_Dbg( p_demux,
1454                     "track[Id 0x%x] does not provide Sync Sample Box (stss)",
1455                     p_track->i_track_ID );
1456     }
1457
1458     *pi_chunk  = i_chunk;
1459     *pi_sample = i_sample;
1460
1461     return VLC_SUCCESS;
1462 }
1463
1464 static int  TrackGotoChunkSample( demux_t   *p_demux,
1465                                   mp4_track_t *p_track,
1466                                   unsigned int     i_chunk,
1467                                   unsigned int     i_sample )
1468 {
1469     vlc_bool_t b_reselect = VLC_FALSE;
1470
1471     /* now see if actual es is ok */
1472     if( p_track->i_chunk < 0 ||
1473         p_track->i_chunk >= p_track->i_chunk_count ||
1474         p_track->chunk[p_track->i_chunk].i_sample_description_index !=
1475             p_track->chunk[i_chunk].i_sample_description_index )
1476     {
1477         msg_Warn( p_demux, "recreate ES" );
1478
1479         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, p_track->p_es, &b_reselect );
1480
1481         es_out_Del( p_demux->out, p_track->p_es );
1482
1483         p_track->p_es = NULL;
1484
1485         if( TrackCreateES( p_demux,
1486                            p_track, i_chunk,
1487                            &p_track->p_es ) )
1488         {
1489             msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
1490                      p_track->i_track_ID );
1491
1492             p_track->b_ok       = VLC_FALSE;
1493             p_track->b_selected = VLC_FALSE;
1494             return VLC_EGENERIC;
1495         }
1496     }
1497
1498     /* select again the new decoder */
1499     if( b_reselect )
1500     {
1501         es_out_Control( p_demux->out, ES_OUT_SET_ES, p_track->p_es );
1502     }
1503
1504     p_track->i_chunk    = i_chunk;
1505     p_track->i_sample   = i_sample;
1506
1507     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
1508 }
1509
1510 /****************************************************************************
1511  * MP4_TrackCreate:
1512  ****************************************************************************
1513  * Parse track information and create all needed data to run a track
1514  * If it succeed b_ok is set to 1 else to 0
1515  ****************************************************************************/
1516 static void MP4_TrackCreate( demux_t *p_demux,
1517                              mp4_track_t *p_track,
1518                              MP4_Box_t  * p_box_trak )
1519 {
1520     demux_sys_t *p_sys = p_demux->p_sys;
1521
1522     MP4_Box_t *p_tkhd = MP4_BoxGet( p_box_trak, "tkhd" );
1523     MP4_Box_t *p_tref = MP4_BoxGet( p_box_trak, "tref" );
1524     MP4_Box_t *p_elst;
1525
1526     MP4_Box_t *p_mdhd;
1527     MP4_Box_t *p_hdlr;
1528
1529     MP4_Box_t *p_vmhd;
1530     MP4_Box_t *p_smhd;
1531
1532     MP4_Box_t *p_drms;
1533
1534     unsigned int i;
1535     char language[4];
1536
1537     /* hint track unsuported */
1538
1539     /* set default value (-> track unusable) */
1540     p_track->b_ok       = VLC_FALSE;
1541     p_track->b_enable   = VLC_FALSE;
1542     p_track->b_selected = VLC_FALSE;
1543
1544     es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 );
1545
1546     if( !p_tkhd )
1547     {
1548         return;
1549     }
1550
1551     /* do we launch this track by default ? */
1552     p_track->b_enable =
1553         ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
1554
1555     p_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
1556     p_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
1557     p_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
1558
1559     if( p_tref )
1560     {
1561 /*        msg_Warn( p_demux, "unhandled box: tref --> FIXME" ); */
1562     }
1563
1564     p_mdhd = MP4_BoxGet( p_box_trak, "mdia/mdhd" );
1565     p_hdlr = MP4_BoxGet( p_box_trak, "mdia/hdlr" );
1566
1567     if( ( !p_mdhd )||( !p_hdlr ) )
1568     {
1569         return;
1570     }
1571
1572     p_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
1573
1574     for( i = 0; i < 3; i++ )
1575     {
1576         language[i] = p_mdhd->data.p_mdhd->i_language[i];
1577     }
1578     language[3] = '\0';
1579
1580     switch( p_hdlr->data.p_hdlr->i_handler_type )
1581     {
1582         case( FOURCC_soun ):
1583             if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) )
1584             {
1585                 return;
1586             }
1587             p_track->fmt.i_cat = AUDIO_ES;
1588             break;
1589
1590         case( FOURCC_vide ):
1591             if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) )
1592             {
1593                 return;
1594             }
1595             p_track->fmt.i_cat = VIDEO_ES;
1596             break;
1597
1598         case( FOURCC_text ):
1599             p_track->fmt.i_cat = SPU_ES;
1600             break;
1601
1602         default:
1603             return;
1604     }
1605
1606     p_track->i_elst = 0;
1607     p_track->i_elst_time = 0;
1608     if( ( p_track->p_elst = p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) )
1609     {
1610         MP4_Box_data_elst_t *elst = p_elst->data.p_elst;
1611         int i;
1612
1613         msg_Warn( p_demux, "elst box found" );
1614         for( i = 0; i < elst->i_entry_count; i++ )
1615         {
1616             msg_Dbg( p_demux, "   - [%d] duration="I64Fd"ms media time="I64Fd"ms) rate=%d.%d",
1617                      i,
1618                      elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
1619                      elst->i_media_time[i] >= 0 ?
1620                         elst->i_media_time[i] * 1000 / p_track->i_timescale : -1,
1621                      elst->i_media_rate_integer[i],
1622                      elst->i_media_rate_fraction[i] );
1623         }
1624     }
1625
1626
1627 /*  TODO
1628     add support for:
1629     p_dinf = MP4_BoxGet( p_minf, "dinf" );
1630 */
1631     if( !( p_track->p_stbl = MP4_BoxGet( p_box_trak,"mdia/minf/stbl" ) ) ||
1632         !( p_track->p_stsd = MP4_BoxGet( p_box_trak,"mdia/minf/stbl/stsd") ) )
1633     {
1634         return;
1635     }
1636
1637     p_drms = MP4_BoxGet( p_track->p_stsd, "drms" );
1638     p_track->b_drms = p_drms != NULL;
1639     p_track->p_drms = p_track->b_drms ?
1640         p_drms->data.p_sample_soun->p_drms : NULL;
1641
1642     /* Set language */
1643     if( strcmp( language, "```" ) && strcmp( language, "und" ) )
1644     {
1645         p_track->fmt.psz_language = strdup( language );
1646     }
1647
1648     /* fxi i_timescale for AUDIO_ES with i_qt_version == 0 */
1649     if( p_track->fmt.i_cat == AUDIO_ES ) //&& p_track->i_sample_size == 1 )
1650     {
1651         MP4_Box_t *p_sample;
1652
1653         p_sample = MP4_BoxGet(  p_track->p_stsd, "[0]" );
1654         if( p_sample && p_sample->data.p_sample_soun)
1655         {
1656             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1657             if( p_soun->i_qt_version == 0 &&
1658                 p_track->i_timescale != p_soun->i_sampleratehi )
1659             {
1660                 msg_Warn( p_demux,
1661                           "i_timescale ("I64Fu") != i_sampleratehi (%u) with "
1662                           "qt_version == 0\n"
1663                           "Making both equal. (report any problem)",
1664                           p_track->i_timescale, p_soun->i_sampleratehi );
1665
1666                 if( p_soun->i_sampleratehi )
1667                     p_track->i_timescale = p_soun->i_sampleratehi;
1668                 else
1669                     p_soun->i_sampleratehi = p_track->i_timescale;
1670             }
1671         }
1672     }
1673
1674     /* Create chunk index table and sample index table */
1675     if( TrackCreateChunksIndex( p_demux,p_track  ) ||
1676         TrackCreateSamplesIndex( p_demux, p_track ) )
1677     {
1678         return; /* cannot create chunks index */
1679     }
1680
1681     p_track->i_chunk  = 0;
1682     p_track->i_sample = 0;
1683
1684     /* now create es */
1685     if( TrackCreateES( p_demux,
1686                        p_track, p_track->i_chunk,
1687                        &p_track->p_es ) )
1688     {
1689         msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
1690                  p_track->i_track_ID );
1691         return;
1692     }
1693
1694 #if 0
1695     {
1696         int i;
1697         for( i = 0; i < p_track->i_chunk_count; i++ )
1698         {
1699             fprintf( stderr, "%-5d sample_count=%d pts=%lld\n", i, p_track->chunk[i].i_sample_count, p_track->chunk[i].i_first_dts );
1700
1701         }
1702     }
1703 #endif
1704     p_track->b_ok = VLC_TRUE;
1705 }
1706
1707 /****************************************************************************
1708  * MP4_TrackDestroy:
1709  ****************************************************************************
1710  * Destroy a track created by MP4_TrackCreate.
1711  ****************************************************************************/
1712 static void MP4_TrackDestroy( demux_t *p_demux,
1713                               mp4_track_t *p_track )
1714 {
1715     unsigned int i_chunk;
1716
1717     p_track->b_ok = VLC_FALSE;
1718     p_track->b_enable   = VLC_FALSE;
1719     p_track->b_selected = VLC_FALSE;
1720
1721     es_format_Clean( &p_track->fmt );
1722
1723     for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ )
1724     {
1725         if( p_track->chunk )
1726         {
1727            FREE(p_track->chunk[i_chunk].p_sample_count_dts);
1728            FREE(p_track->chunk[i_chunk].p_sample_delta_dts );
1729         }
1730     }
1731     FREE( p_track->chunk );
1732
1733     if( !p_track->i_sample_size )
1734     {
1735         FREE( p_track->p_sample_size );
1736     }
1737 }
1738
1739 static int  MP4_TrackSelect ( demux_t    *p_demux,
1740                               mp4_track_t  *p_track,
1741                               mtime_t           i_start )
1742 {
1743     if( !p_track->b_ok )
1744     {
1745         return VLC_EGENERIC;
1746     }
1747
1748     if( p_track->b_selected )
1749     {
1750         msg_Warn( p_demux,
1751                   "track[Id 0x%x] already selected",
1752                   p_track->i_track_ID );
1753         return VLC_SUCCESS;
1754     }
1755
1756     return MP4_TrackSeek( p_demux, p_track, i_start );
1757 }
1758
1759 static void MP4_TrackUnselect(demux_t    *p_demux,
1760                               mp4_track_t  *p_track )
1761 {
1762     if( !p_track->b_ok )
1763     {
1764         return;
1765     }
1766
1767     if( !p_track->b_selected )
1768     {
1769         msg_Warn( p_demux,
1770                   "track[Id 0x%x] already unselected",
1771                   p_track->i_track_ID );
1772         return;
1773     }
1774     if( p_track->p_es )
1775     {
1776         es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE, p_track->p_es, VLC_FALSE );
1777     }
1778
1779     p_track->b_selected = VLC_FALSE;
1780 }
1781
1782 static int  MP4_TrackSeek   ( demux_t    *p_demux,
1783                               mp4_track_t  *p_track,
1784                               mtime_t           i_start )
1785 {
1786     uint32_t i_chunk;
1787     uint32_t i_sample;
1788
1789     if( !p_track->b_ok )
1790     {
1791         return( VLC_EGENERIC );
1792     }
1793
1794     if( TrackTimeToSampleChunk( p_demux,
1795                                 p_track, i_start,
1796                                 &i_chunk, &i_sample ) )
1797     {
1798         msg_Warn( p_demux,
1799                   "cannot select track[Id 0x%x]",
1800                   p_track->i_track_ID );
1801         return( VLC_EGENERIC );
1802     }
1803
1804     p_track->b_selected = VLC_TRUE;
1805
1806     if( TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) )
1807     {
1808         p_track->b_selected = VLC_FALSE;
1809     }
1810     return( p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC );
1811 }
1812
1813
1814 /*
1815  * 3 types: for audio
1816  *
1817  */
1818 #define QT_V0_MAX_SAMPLES    1500
1819 static int  MP4_TrackSampleSize( mp4_track_t   *p_track )
1820 {
1821     int i_size;
1822     MP4_Box_data_sample_soun_t *p_soun;
1823
1824     if( p_track->i_sample_size == 0 )
1825     {
1826         /* most simple case */
1827         return( p_track->p_sample_size[p_track->i_sample] );
1828     }
1829     if( p_track->fmt.i_cat != AUDIO_ES )
1830     {
1831         return( p_track->i_sample_size );
1832     }
1833
1834     if( p_track->i_sample_size != 1 )
1835     {
1836         //msg_Warn( p_demux, "SampleSize != 1" );
1837         return( p_track->i_sample_size );
1838     }
1839
1840     p_soun = p_track->p_sample->data.p_sample_soun;
1841
1842     if( p_soun->i_qt_version == 1 )
1843     {
1844         i_size = p_track->chunk[p_track->i_chunk].i_sample_count / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
1845     }
1846     else
1847     {
1848         /* FIXME */
1849         int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count -
1850                 ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first );
1851         if( i_samples > QT_V0_MAX_SAMPLES )
1852         {
1853             i_samples = QT_V0_MAX_SAMPLES;
1854         }
1855         i_size = i_samples * p_soun->i_channelcount * p_soun->i_samplesize / 8;
1856     }
1857
1858     //fprintf( stderr, "size=%d\n", i_size );
1859     return( i_size );
1860 }
1861
1862
1863 static uint64_t MP4_TrackGetPos( mp4_track_t *p_track )
1864 {
1865     unsigned int i_sample;
1866     uint64_t i_pos;
1867
1868
1869     i_pos = p_track->chunk[p_track->i_chunk].i_offset;
1870
1871     if( p_track->i_sample_size )
1872     {
1873         MP4_Box_data_sample_soun_t *p_soun = p_track->p_sample->data.p_sample_soun;
1874
1875         if( p_soun->i_qt_version == 0 )
1876         {
1877             i_pos += ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ) *
1878                         p_soun->i_channelcount * p_soun->i_samplesize / 8;
1879         }
1880         else
1881         {
1882             /* we read chunk by chunk */
1883             i_pos += 0;
1884         }
1885     }
1886     else
1887     {
1888         for( i_sample = p_track->chunk[p_track->i_chunk].i_sample_first;
1889                 i_sample < p_track->i_sample; i_sample++ )
1890         {
1891             i_pos += p_track->p_sample_size[i_sample];
1892         }
1893
1894     }
1895     return( i_pos );
1896 }
1897
1898 static int  MP4_TrackNextSample( demux_t     *p_demux,
1899                                  mp4_track_t   *p_track )
1900 {
1901
1902     if( p_track->fmt.i_cat == AUDIO_ES &&
1903         p_track->i_sample_size != 0 )
1904     {
1905         MP4_Box_data_sample_soun_t *p_soun;
1906
1907         p_soun = p_track->p_sample->data.p_sample_soun;
1908
1909         if( p_soun->i_qt_version == 1 )
1910         {
1911             /* chunk by chunk */
1912             p_track->i_sample =
1913                 p_track->chunk[p_track->i_chunk].i_sample_first +
1914                 p_track->chunk[p_track->i_chunk].i_sample_count;
1915         }
1916         else
1917         {
1918             /* FIXME */
1919             p_track->i_sample += QT_V0_MAX_SAMPLES;
1920             if( p_track->i_sample > p_track->chunk[p_track->i_chunk].i_sample_first + p_track->chunk[p_track->i_chunk].i_sample_count )
1921             {
1922                 p_track->i_sample =
1923                     p_track->chunk[p_track->i_chunk].i_sample_first +
1924                     p_track->chunk[p_track->i_chunk].i_sample_count;
1925             }
1926         }
1927     }
1928     else
1929     {
1930         p_track->i_sample++;
1931     }
1932
1933     if( p_track->i_sample >= p_track->i_sample_count )
1934     {
1935         /* we have reach end of the track so free decoder stuff */
1936         msg_Warn( p_demux, "track[0x%x] will be disabled", p_track->i_track_ID );
1937         MP4_TrackUnselect( p_demux, p_track );
1938         return VLC_EGENERIC;
1939     }
1940
1941     /* Have we changed chunk ? */
1942     if( p_track->i_sample >=
1943             p_track->chunk[p_track->i_chunk].i_sample_first +
1944             p_track->chunk[p_track->i_chunk].i_sample_count )
1945     {
1946         if( TrackGotoChunkSample( p_demux,
1947                                   p_track,
1948                                   p_track->i_chunk + 1,
1949                                   p_track->i_sample ) )
1950         {
1951             msg_Warn( p_demux, "track[0x%x] will be disabled (cannot restart decoder)", p_track->i_track_ID );
1952             MP4_TrackUnselect( p_demux, p_track );
1953             return VLC_EGENERIC;
1954         }
1955     }
1956
1957     /* Have we changed elst */
1958     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1959     {
1960         demux_sys_t *p_sys = p_demux->p_sys;
1961         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1962         int64_t i_mvt = MP4_TrackGetPTS( p_demux, p_track ) * p_sys->i_timescale / (int64_t)1000000;
1963
1964         if( p_track->i_elst < elst->i_entry_count &&
1965             i_mvt >= p_track->i_elst_time + elst->i_segment_duration[p_track->i_elst] )
1966         {
1967             MP4_TrackSetELST( p_demux, p_track, MP4_TrackGetPTS( p_demux, p_track ) );
1968         }
1969     }
1970
1971     return VLC_SUCCESS;
1972 }
1973
1974 static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk, int64_t i_time )
1975 {
1976     demux_sys_t *p_sys = p_demux->p_sys;
1977     int         i_elst_last = tk->i_elst;
1978
1979     /* handle elst (find the correct one) */
1980     tk->i_elst      = 0;
1981     tk->i_elst_time = 0;
1982     if( tk->p_elst && tk->p_elst->data.p_elst->i_entry_count > 0 )
1983     {
1984         MP4_Box_data_elst_t *elst = tk->p_elst->data.p_elst;
1985         int64_t i_mvt= i_time * p_sys->i_timescale / (int64_t)1000000;
1986
1987         for( tk->i_elst = 0; tk->i_elst < elst->i_entry_count; tk->i_elst++ )
1988         {
1989             mtime_t i_dur = elst->i_segment_duration[tk->i_elst];
1990
1991             if( tk->i_elst_time <= i_mvt && i_mvt < tk->i_elst_time + i_dur )
1992             {
1993                 break;
1994             }
1995             tk->i_elst_time += i_dur;
1996         }
1997
1998         if( tk->i_elst >= elst->i_entry_count )
1999         {
2000             /* msg_Dbg( p_demux, "invalid number of entry in elst" ); */
2001             tk->i_elst = elst->i_entry_count - 1;
2002             tk->i_elst_time -= elst->i_segment_duration[tk->i_elst];
2003         }
2004
2005         if( elst->i_media_time[tk->i_elst] < 0 )
2006         {
2007             /* track offset */
2008             tk->i_elst_time += elst->i_segment_duration[tk->i_elst];
2009         }
2010     }
2011     if( i_elst_last != tk->i_elst )
2012     {
2013         msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
2014     }
2015 }
2016