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_access ) + 3 + 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                             strcpy( psz_absolute, p_demux->psz_access );
 377                             strcat( psz_absolute, "://" );
 378                             strncat( psz_absolute, p_demux->psz_path, i_len);
 379                         }
 380                         else
 381                         {
 382                             strcpy( psz_absolute, "" );
 383                         }
 384                         strcat( psz_absolute, psz_ref );
 385                         msg_Dbg( p_demux, "adding ref = `%s'", psz_absolute );
 386                         playlist_Add( p_playlist, psz_absolute, psz_absolute,
 387                                       PLAYLIST_APPEND, PLAYLIST_END );
 388                     }
 389                 }
 390                 else
 391                 {
 392                     msg_Err( p_demux, "unknown ref type=%4.4s FIXME (send a bug report)",
 393                              (char*)&p_rdrf->data.p_rdrf->i_ref_type );
 394                 }
 395             }
 396             vlc_object_release( p_playlist );
 397         }
 398         else
 399         {
 400             msg_Err( p_demux, "can't find playlist" );
 401         }
 402     }
 403
 404     if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) )
 405     {
 406         if( !p_rmra )
 407         {
 408             msg_Err( p_demux, "cannot find /moov/mvhd" );
 409             goto error;
 410         }
 411         else
 412         {
 413             msg_Warn( p_demux, "cannot find /moov/mvhd (pure ref file)" );
 414             p_demux->pf_demux = DemuxRef;
 415             return VLC_SUCCESS;
 416         }
 417     }
 418     else
 419     {
 420         p_sys->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 421         p_sys->i_duration = p_mvhd->data.p_mvhd->i_duration;
 422     }
 423
 424     if( !( p_sys->i_tracks = MP4_BoxCount( p_sys->p_root, "/moov/trak" ) ) )
 425     {
 426         msg_Err( p_demux, "cannot find any /moov/trak" );
 427         goto error;
 428     }
 429     msg_Dbg( p_demux, "find %d track%c",
 430                         p_sys->i_tracks,
 431                         p_sys->i_tracks ? 's':' ' );
 432
 433     /* allocate memory */
 434     p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
 435     memset( p_sys->track, 0, p_sys->i_tracks * sizeof( mp4_track_t ) );
 436
 437     /* now process each track and extract all usefull information */
 438     for( i = 0; i < p_sys->i_tracks; i++ )
 439     {
 440         p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 441         MP4_TrackCreate( p_demux, &p_sys->track[i], p_trak );
 442
 443         if( p_sys->track[i].b_ok )
 444         {
 445             char *psz_cat;
 446             switch( p_sys->track[i].fmt.i_cat )
 447             {
 448                 case( VIDEO_ES ):
 449                     psz_cat = "video";
 450                     break;
 451                 case( AUDIO_ES ):
 452                     psz_cat = "audio";
 453                     break;
 454                 case( SPU_ES ):
 455                     psz_cat = "subtitle";
 456                     break;
 457
 458                 default:
 459                     psz_cat = "unknown";
 460                     break;
 461             }
 462
 463             msg_Dbg( p_demux, "adding track[Id 0x%x] %s (%s) language %s",
 464                             p_sys->track[i].i_track_ID,
 465                             psz_cat,
 466                             p_sys->track[i].b_enable ? "enable":"disable",
 467                             p_sys->track[i].fmt.psz_language ? p_sys->track[i].fmt.psz_language : "undef" );
 468         }
 469         else
 470         {
 471             msg_Dbg( p_demux, "ignoring track[Id 0x%x]", p_sys->track[i].i_track_ID );
 472         }
 473
 474     }
 475     return VLC_SUCCESS;
 476
 477 error:
 478     if( p_sys->p_root )
 479     {
 480         MP4_BoxFree( p_demux->s, p_sys->p_root );
 481     }
 482     free( p_sys );
 483     return VLC_EGENERIC;
 484 }
 485
 486 /*****************************************************************************
 487  * Demux: read packet and send them to decoders
 488  *****************************************************************************
 489  * TODO check for newly selected track (ie audio upt to now )
 490  *****************************************************************************/
 491 static int Demux( demux_t *p_demux )
 492 {
 493     demux_sys_t *p_sys = p_demux->p_sys;
 494     unsigned int i_track;
 495
 496
 497     unsigned int i_track_selected;
 498
 499     /* check for newly selected/unselected track */
 500     for( i_track = 0, i_track_selected = 0; i_track < p_sys->i_tracks;
 501          i_track++ )
 502     {
 503         mp4_track_t *tk = &p_sys->track[i_track];
 504
 505         if( tk->b_selected && tk->i_sample >= tk->i_sample_count )
 506         {
 507             msg_Warn( p_demux, "track[0x%x] will be disabled", tk->i_track_ID );
 508             MP4_TrackUnselect( p_demux, tk);
 509         }
 510         else if( tk->b_ok )
 511         {
 512             vlc_bool_t b;
 513             es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 514
 515             if( tk->b_selected && !b )
 516             {
 517                 MP4_TrackUnselect( p_demux, tk );
 518             }
 519             else if( !tk->b_selected && b)
 520             {
 521                 MP4_TrackSelect( p_demux, tk, MP4_GetMoviePTS( p_sys ) );
 522             }
 523
 524             if( tk->b_selected )
 525             {
 526                 i_track_selected++;
 527             }
 528         }
 529     }
 530
 531     if( i_track_selected <= 0 )
 532     {
 533         p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 534         if( p_sys->i_timescale > 0 )
 535         {
 536             int64_t i_length = (mtime_t)1000000 *
 537                                (mtime_t)p_sys->i_duration /
 538                                (mtime_t)p_sys->i_timescale;
 539             if( MP4_GetMoviePTS( p_sys ) >= i_length )
 540                 return 0;
 541             return 1;
 542         }
 543
 544         msg_Warn( p_demux, "no track selected, exiting..." );
 545         return 0;
 546     }
 547
 548     /* first wait for the good time to read a packet */
 549     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr + 1 );
 550
 551     p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
 552
 553     /* we will read 100ms for each stream so ...*/
 554     p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 555
 556     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 557     {
 558         mp4_track_t *tk = &p_sys->track[i_track];
 559
 560         if( !tk->b_ok || !tk->b_selected )
 561         {
 562             continue;
 563         }
 564
 565         while( MP4_TrackGetPTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
 566         {
 567 #if 0
 568             msg_Dbg( p_demux, "tk=%lld mv=%lld",
 569                      MP4_TrackGetPTS( p_demux, tk ),
 570                      MP4_GetMoviePTS( p_sys ) );
 571 #endif
 572
 573             if( MP4_TrackSampleSize( tk ) > 0 )
 574             {
 575                 block_t *p_block;
 576
 577                 /* go,go go ! */
 578                 if( stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
 579                 {
 580                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
 581                     MP4_TrackUnselect( p_demux, tk );
 582                     break;
 583                 }
 584
 585                 /* now read pes */
 586                 if( ( p_block = stream_Block( p_demux->s,
 587                                               MP4_TrackSampleSize( tk ) ) ) == NULL )
 588                 {
 589                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)", tk->i_track_ID );
 590                     MP4_TrackUnselect( p_demux, tk );
 591                     break;
 592                 }
 593
 594                 if( tk->b_drms && tk->p_drms )
 595                 {
 596                     drms_decrypt( tk->p_drms,
 597                                   (uint32_t*)p_block->p_buffer,
 598                                   p_block->i_buffer );
 599                 }
 600                 else if( tk->fmt.i_cat == SPU_ES )
 601                 {
 602                     if( tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) && p_block->i_buffer >= 2 )
 603                     {
 604                         uint16_t i_size = GetWBE( p_block->p_buffer );
 605
 606                         if( i_size + 2 <= p_block->i_buffer )
 607                         {
 608                             char *p;
 609                             /* remove the length field, and append a '\0' */
 610                             memmove( &p_block->p_buffer[0], &p_block->p_buffer[2], i_size );
 611                             p_block->p_buffer[i_size] = '\0';
 612                             p_block->i_buffer = i_size + 1;
 613
 614                             /* convert \r -> \n */
 615                             while( ( p = strchr( p_block->p_buffer, '\r' ) ) )
 616                             {
 617                                 *p = '\n';
 618                             }
 619                         }
 620                         else
 621                         {
 622                             /* Invalid */
 623                             p_block->i_buffer = 0;
 624                         }
 625                     }
 626                 }
 627                 p_block->i_dts = MP4_TrackGetPTS( p_demux, tk ) + 1;
 628
 629                 p_block->i_pts = tk->fmt.i_cat == VIDEO_ES ? 0 : p_block->i_dts + 1;
 630
 631                 if( !tk->b_drms || ( tk->b_drms && tk->p_drms ) )
 632                 {
 633                     es_out_Send( p_demux->out, tk->p_es, p_block );
 634                 }
 635             }
 636
 637             /* Next sample */
 638             if( MP4_TrackNextSample( p_demux, tk ) )
 639             {
 640                 break;
 641             }
 642         }
 643     }
 644
 645     return 1;
 646 }
 647 /*****************************************************************************
 648  * Seek: Got to i_date
 649 ******************************************************************************/
 650 static int Seek( demux_t *p_demux, mtime_t i_date )
 651 {
 652     demux_sys_t *p_sys = p_demux->p_sys;
 653     unsigned int i_track;
 654
 655     /* First update update global time */
 656     p_sys->i_time = i_date * p_sys->i_timescale / 1000000;
 657     p_sys->i_pcr  = i_date;
 658
 659     /* Now for each stream try to go to this time */
 660     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 661     {
 662         mp4_track_t *tk = &p_sys->track[i_track];
 663         MP4_TrackSeek( p_demux, tk, i_date );
 664     }
 665     return VLC_SUCCESS;
 666 }
 667
 668 /*****************************************************************************
 669  * Control:
 670  *****************************************************************************/
 671 static int Control( demux_t *p_demux, int i_query, va_list args )
 672 {
 673     demux_sys_t *p_sys = p_demux->p_sys;
 674
 675     double f, *pf;
 676     int64_t i64, *pi64;
 677
 678     switch( i_query )
 679     {
 680         case DEMUX_GET_POSITION:
 681             pf = (double*)va_arg( args, double * );
 682             if( p_sys->i_duration > 0 )
 683             {
 684                 *pf = (double)p_sys->i_time / (double)p_sys->i_duration;
 685             }
 686             else
 687             {
 688                 *pf = 0.0;
 689             }
 690             return VLC_SUCCESS;
 691
 692         case DEMUX_SET_POSITION:
 693             f = (double)va_arg( args, double );
 694             if( p_sys->i_timescale > 0 )
 695             {
 696                 i64 = (int64_t)( f * (double)1000000 *
 697                                  (double)p_sys->i_duration /
 698                                  (double)p_sys->i_timescale );
 699                 return Seek( p_demux, i64 );
 700             }
 701             else return VLC_SUCCESS;
 702
 703         case DEMUX_GET_TIME:
 704             pi64 = (int64_t*)va_arg( args, int64_t * );
 705             if( p_sys->i_timescale > 0 )
 706             {
 707                 *pi64 = (mtime_t)1000000 *
 708                         (mtime_t)p_sys->i_time /
 709                         (mtime_t)p_sys->i_timescale;
 710             }
 711             else *pi64 = 0;
 712             return VLC_SUCCESS;
 713
 714         case DEMUX_SET_TIME:
 715             i64 = (int64_t)va_arg( args, int64_t );
 716             return Seek( p_demux, i64 );
 717
 718         case DEMUX_GET_LENGTH:
 719             pi64 = (int64_t*)va_arg( args, int64_t * );
 720             if( p_sys->i_timescale > 0 )
 721             {
 722                 *pi64 = (mtime_t)1000000 *
 723                         (mtime_t)p_sys->i_duration /
 724                         (mtime_t)p_sys->i_timescale;
 725             }
 726             else *pi64 = 0;
 727             return VLC_SUCCESS;
 728
 729         case DEMUX_GET_FPS:
 730             msg_Warn( p_demux, "DEMUX_GET_FPS unimplemented !!" );
 731             return VLC_EGENERIC;
 732
 733         case DEMUX_GET_META:
 734         {
 735             vlc_meta_t **pp_meta = (vlc_meta_t**)va_arg( args, vlc_meta_t** );
 736             vlc_meta_t *meta;
 737             MP4_Box_t  *p_udta   = MP4_BoxGet( p_sys->p_root, "/moov/udta" );
 738             MP4_Box_t  *p_0xa9xxx;
 739             if( p_udta == NULL )
 740             {
 741                 return VLC_EGENERIC;
 742             }
 743             *pp_meta = meta = vlc_meta_New();
 744             for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
 745                  p_0xa9xxx = p_0xa9xxx->p_next )
 746             {
 747                 switch( p_0xa9xxx->i_type )
 748                 {
 749                 case FOURCC_0xa9nam:
 750                     vlc_meta_Add( meta, VLC_META_TITLE,
 751                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 752                     break;
 753                 case FOURCC_0xa9aut:
 754                     vlc_meta_Add( meta, VLC_META_AUTHOR,
 755                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 756                     break;
 757                 case FOURCC_0xa9ART:
 758                     vlc_meta_Add( meta, VLC_META_ARTIST,
 759                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 760                     break;
 761                 case FOURCC_0xa9cpy:
 762                     vlc_meta_Add( meta, VLC_META_COPYRIGHT,
 763                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 764                     break;
 765                 case FOURCC_0xa9day:
 766                     vlc_meta_Add( meta, VLC_META_DATE,
 767                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 768                     break;
 769                 case FOURCC_0xa9des:
 770                     vlc_meta_Add( meta, VLC_META_DESCRIPTION,
 771                                   p_0xa9xxx->data.p_0xa9xxx->psz_text );
 772                     break;
 773
 774                 case FOURCC_0xa9swr:
 775                 case FOURCC_0xa9inf:
 776                 case FOURCC_0xa9dir:
 777                 case FOURCC_0xa9cmt:
 778                 case FOURCC_0xa9req:
 779                 case FOURCC_0xa9fmt:
 780                 case FOURCC_0xa9prd:
 781                 case FOURCC_0xa9prf:
 782                 case FOURCC_0xa9src:
 783                     /* TODO one day, but they aren't really meaningfull */
 784                     break;
 785
 786                 default:
 787                     break;
 788                 }
 789             }
 790             return VLC_SUCCESS;
 791         }
 792
 793         case DEMUX_GET_TITLE_INFO:
 794         case DEMUX_SET_NEXT_DEMUX_TIME:
 795         case DEMUX_SET_GROUP:
 796             return VLC_EGENERIC;
 797
 798         default:
 799             msg_Warn( p_demux, "control query unimplemented !!!" );
 800             return VLC_EGENERIC;
 801     }
 802 }
 803
 804 /*****************************************************************************
 805  * Close: frees unused data
 806  *****************************************************************************/
 807 static void Close ( vlc_object_t * p_this )
 808 {
 809     unsigned int i_track;
 810     demux_t *  p_demux = (demux_t *)p_this;
 811     demux_sys_t *p_sys = p_demux->p_sys;
 812
 813     msg_Dbg( p_demux, "freeing all memory" );
 814
 815     MP4_BoxFree( p_demux->s, p_sys->p_root );
 816     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 817     {
 818         MP4_TrackDestroy( p_demux, &p_sys->track[i_track] );
 819     }
 820     FREE( p_sys->track );
 821
 822     free( p_sys );
 823 }
 824
 825
 826
 827 /****************************************************************************
 828  * Local functions, specific to vlc
 829  ****************************************************************************/
 830
 831 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
 832 static int TrackCreateChunksIndex( demux_t *p_demux,
 833                                    mp4_track_t *p_demux_track )
 834 {
 835     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
 836     MP4_Box_t *p_stsc;
 837
 838     unsigned int i_chunk;
 839     unsigned int i_index, i_last;
 840
 841     if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
 842           !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )||
 843         ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
 844     {
 845         return( VLC_EGENERIC );
 846     }
 847
 848     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
 849     if( !p_demux_track->i_chunk_count )
 850     {
 851         msg_Warn( p_demux, "no chunk defined" );
 852         return( VLC_EGENERIC );
 853     }
 854     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
 855                                    sizeof( mp4_chunk_t ) );
 856
 857     /* first we read chunk offset */
 858     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 859     {
 860         p_demux_track->chunk[i_chunk].i_offset =
 861                 p_co64->data.p_co64->i_chunk_offset[i_chunk];
 862     }
 863
 864     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
 865         to be used for the sample XXX begin to 1
 866         We construct it begining at the end */
 867     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
 868     i_index = p_stsc->data.p_stsc->i_entry_count;
 869     if( !i_index )
 870     {
 871         msg_Warn( p_demux, "cannot read chunk table or table empty" );
 872         return( VLC_EGENERIC );
 873     }
 874
 875     while( i_index )
 876     {
 877         i_index--;
 878         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 879                 i_chunk < i_last; i_chunk++ )
 880         {
 881             p_demux_track->chunk[i_chunk].i_sample_description_index =
 882                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
 883             p_demux_track->chunk[i_chunk].i_sample_count =
 884                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
 885         }
 886         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 887     }
 888
 889     p_demux_track->chunk[0].i_sample_first = 0;
 890     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 891     {
 892         p_demux_track->chunk[i_chunk].i_sample_first =
 893             p_demux_track->chunk[i_chunk-1].i_sample_first +
 894                 p_demux_track->chunk[i_chunk-1].i_sample_count;
 895     }
 896
 897     msg_Dbg( p_demux,
 898              "track[Id 0x%x] read %d chunk",
 899              p_demux_track->i_track_ID,
 900              p_demux_track->i_chunk_count );
 901
 902     return( VLC_SUCCESS );
 903 }
 904 static int TrackCreateSamplesIndex( demux_t *p_demux,
 905                                     mp4_track_t *p_demux_track )
 906 {
 907     MP4_Box_t *p_stts; /* makes mapping between sample and decoding time,
 908                           ctts make same mapping but for composition time,
 909                           not yet used and probably not usefull */
 910     MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2
 911                           that uses a compressed form FIXME make them in libmp4
 912                           as a unique type */
 913     /* TODO use also stss and stsh table for seeking */
 914     /* FIXME use edit table */
 915     int64_t i_sample;
 916     int64_t i_chunk;
 917
 918     int64_t i_index;
 919     int64_t i_index_sample_used;
 920
 921     int64_t i_last_dts;
 922
 923     p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
 924     p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
 925
 926     if( ( !p_stts )||( !p_stsz ) )
 927     {
 928         msg_Warn( p_demux, "cannot read sample table" );
 929         return( VLC_EGENERIC );
 930     }
 931
 932     p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count;
 933
 934
 935     /* for sample size, there are 2 case */
 936     if( p_stsz->data.p_stsz->i_sample_size )
 937     {
 938         /* 1: all sample have the same size, so no need to construct a table */
 939         p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size;
 940         p_demux_track->p_sample_size = NULL;
 941     }
 942     else
 943     {
 944         /* 2: each sample can have a different size */
 945         p_demux_track->i_sample_size = 0;
 946         p_demux_track->p_sample_size =
 947             calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
 948
 949         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
 950         {
 951             p_demux_track->p_sample_size[i_sample] =
 952                     p_stsz->data.p_stsz->i_entry_size[i_sample];
 953         }
 954     }
 955     /* we have extract all information from stsz,
 956         now use stts */
 957
 958     /* if we don't want to waste too much memory, we can't expand
 959        the box !, so each chunk will contain an "extract" of this table
 960        for fast research */
 961
 962     i_last_dts = 0;
 963     i_index = 0; i_index_sample_used =0;
 964
 965     /* create and init last data for each chunk */
 966     for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 967     {
 968
 969         int64_t i_entry, i_sample_count, i;
 970         /* save last dts */
 971         p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts;
 972     /* count how many entries needed for this chunk
 973        for p_sample_delta_dts and p_sample_count_dts */
 974
 975         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 976
 977         i_entry = 0;
 978         while( i_sample_count > 0 )
 979         {
 980             i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry];
 981             if( i_entry == 0 )
 982             {
 983                 i_sample_count += i_index_sample_used; /* don't count already used sample
 984                                                    int this entry */
 985             }
 986             i_entry++;
 987         }
 988
 989         /* allocate them */
 990         p_demux_track->chunk[i_chunk].p_sample_count_dts =
 991             calloc( i_entry, sizeof( uint32_t ) );
 992         p_demux_track->chunk[i_chunk].p_sample_delta_dts =
 993             calloc( i_entry, sizeof( uint32_t ) );
 994
 995         /* now copy */
 996         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 997         for( i = 0; i < i_entry; i++ )
 998         {
 999             int64_t i_used;
1000             int64_t i_rest;
1001
1002             i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used;
1003
1004             i_used = __MIN( i_rest, i_sample_count );
1005
1006             i_index_sample_used += i_used;
1007             i_sample_count -= i_used;
1008
1009             p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used;
1010
1011             p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] =
1012                         p_stts->data.p_stts->i_sample_delta[i_index];
1013
1014             i_last_dts += i_used *
1015                     p_demux_track->chunk[i_chunk].p_sample_delta_dts[i];
1016
1017             if( i_index_sample_used >=
1018                              p_stts->data.p_stts->i_sample_count[i_index] )
1019             {
1020
1021                 i_index++;
1022                 i_index_sample_used = 0;
1023             }
1024         }
1025
1026     }
1027
1028     msg_Dbg( p_demux, "track[Id 0x%x] read %d samples length:"I64Fd"s",
1029              p_demux_track->i_track_ID,
1030              p_demux_track->i_sample_count,
1031              i_last_dts / p_demux_track->i_timescale );
1032
1033     return( VLC_SUCCESS );
1034 }
1035
1036 /*
1037  * TrackCreateES:
1038  * Create ES and PES to init decoder if needed, for a track starting at i_chunk
1039  */
1040 static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
1041                           unsigned int i_chunk, es_out_id_t **pp_es )
1042 {
1043     MP4_Box_t   *p_sample;
1044     MP4_Box_t   *p_esds;
1045
1046     *pp_es = NULL;
1047
1048     if( !p_track->chunk[i_chunk].i_sample_description_index )
1049     {
1050         msg_Warn( p_demux,
1051                   "invalid SampleEntry index (track[Id 0x%x])",
1052                   p_track->i_track_ID );
1053         return VLC_EGENERIC;
1054     }
1055
1056     p_sample = MP4_BoxGet(  p_track->p_stsd, "[%d]",
1057                 p_track->chunk[i_chunk].i_sample_description_index - 1 );
1058
1059     if( !p_sample || ( !p_sample->data.p_data && p_track->fmt.i_cat != SPU_ES ) )
1060     {
1061         msg_Warn( p_demux,
1062                   "cannot find SampleEntry (track[Id 0x%x])",
1063                   p_track->i_track_ID );
1064         return( VLC_EGENERIC );
1065     }
1066
1067     p_track->p_sample = p_sample;
1068
1069     if( p_track->fmt.i_cat == AUDIO_ES && p_track->i_sample_size == 1 )
1070     {
1071         MP4_Box_data_sample_soun_t *p_soun;
1072
1073         p_soun = p_sample->data.p_sample_soun;
1074
1075         if( p_soun->i_qt_version == 0 )
1076         {
1077             switch( p_sample->i_type )
1078             {
1079                 case VLC_FOURCC( 'i', 'm', 'a', '4' ):
1080                     p_soun->i_qt_version = 1;
1081                     p_soun->i_sample_per_packet = 64;
1082                     p_soun->i_bytes_per_packet  = 34;
1083                     p_soun->i_bytes_per_frame   = 34 * p_soun->i_channelcount;
1084                     p_soun->i_bytes_per_sample  = 2;
1085                     break;
1086                 case VLC_FOURCC( 'M', 'A', 'C', '3' ):
1087                     p_soun->i_qt_version = 1;
1088                     p_soun->i_sample_per_packet = 6;
1089                     p_soun->i_bytes_per_packet  = 2;
1090                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1091                     p_soun->i_bytes_per_sample  = 2;
1092                     break;
1093                 case VLC_FOURCC( 'M', 'A', 'C', '6' ):
1094                     p_soun->i_qt_version = 1;
1095                     p_soun->i_sample_per_packet = 12;
1096                     p_soun->i_bytes_per_packet  = 2;
1097                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1098                     p_soun->i_bytes_per_sample  = 2;
1099                     break;
1100                 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
1101                 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
1102                     p_soun->i_samplesize = 8;
1103                     break;
1104                 default:
1105                     break;
1106             }
1107
1108         }
1109         else if( p_soun->i_qt_version == 1 && p_soun->i_sample_per_packet <= 0 )
1110         {
1111             p_soun->i_qt_version = 0;
1112         }
1113     }
1114
1115
1116     /* It's a little ugly but .. there are special cases */
1117     switch( p_sample->i_type )
1118     {
1119         case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
1120         case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
1121             p_track->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
1122             break;
1123         case( VLC_FOURCC( 'r', 'a', 'w', ' ' ) ):
1124             p_track->fmt.i_codec = VLC_FOURCC( 'a', 'r', 'a', 'w' );
1125             break;
1126         case( VLC_FOURCC( 's', '2', '6', '3' ) ):
1127             p_track->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '3' );
1128             break;
1129
1130         case( VLC_FOURCC( 't', 'e', 'x', 't' ) ):
1131             p_track->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
1132             /* FIXME: Not true, could be UTF-16 with a Byte Order Mark (0xfeff) */
1133             /* FIXME UTF-8 doesn't work here ? */
1134             /* p_track->fmt.subs.psz_encoding = strdup( "UTF-8" ); */
1135             break;
1136
1137         default:
1138             p_track->fmt.i_codec = p_sample->i_type;
1139             break;
1140     }
1141
1142     /* now see if esds is present and if so create a data packet
1143         with decoder_specific_info  */
1144 #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
1145     if( ( ( p_esds = MP4_BoxGet( p_sample, "esds" ) ) ||
1146           ( p_esds = MP4_BoxGet( p_sample, "wave/esds" ) ) )&&
1147         ( p_esds->data.p_esds )&&
1148         ( p_decconfig ) )
1149     {
1150         /* First update information based on i_objectTypeIndication */
1151         switch( p_decconfig->i_objectTypeIndication )
1152         {
1153             case( 0x20 ): /* MPEG4 VIDEO */
1154                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','v' );
1155                 break;
1156             case( 0x40):
1157                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1158                 break;
1159             case( 0x60):
1160             case( 0x61):
1161             case( 0x62):
1162             case( 0x63):
1163             case( 0x64):
1164             case( 0x65): /* MPEG2 video */
1165                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1166                 break;
1167             /* Theses are MPEG2-AAC */
1168             case( 0x66): /* main profile */
1169             case( 0x67): /* Low complexity profile */
1170             case( 0x68): /* Scaleable Sampling rate profile */
1171                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1172                 break;
1173             /* true MPEG 2 audio */
1174             case( 0x69):
1175                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1176                 break;
1177             case( 0x6a): /* MPEG1 video */
1178                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1179                 break;
1180             case( 0x6b): /* MPEG1 audio */
1181                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1182                 break;
1183             case( 0x6c ): /* jpeg */
1184                 p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' );
1185                 break;
1186
1187             /* Private ID */
1188             case( 0xe0 ): /* NeroDigital: dvd subs */
1189                 if( p_track->fmt.i_cat == SPU_ES )
1190                 {
1191                     p_track->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
1192                     break;
1193                 }
1194             /* Fallback */
1195             default:
1196                 /* Unknown entry, but don't touch i_fourcc */
1197                 msg_Warn( p_demux,
1198                           "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])",
1199                           p_decconfig->i_objectTypeIndication,
1200                           p_track->i_track_ID );
1201                 break;
1202         }
1203         p_track->fmt.i_extra = p_decconfig->i_decoder_specific_info_len;
1204         if( p_track->fmt.i_extra > 0 )
1205         {
1206             p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1207             memcpy( p_track->fmt.p_extra, p_decconfig->p_decoder_specific_info,
1208                     p_track->fmt.i_extra );
1209         }
1210     }
1211     else
1212     {
1213         switch( p_sample->i_type )
1214         {
1215             /* qt decoder, send the complete chunk */
1216             case VLC_FOURCC( 'S', 'V', 'Q', '3' ):
1217             case VLC_FOURCC( 'S', 'V', 'Q', '1' ):
1218             case VLC_FOURCC( 'V', 'P', '3', '1' ):
1219             case VLC_FOURCC( '3', 'I', 'V', '1' ):
1220             case VLC_FOURCC( 'Z', 'y', 'G', 'o' ):
1221                 p_track->fmt.i_extra =
1222                     p_sample->data.p_sample_vide->i_qt_image_description;
1223                 if( p_track->fmt.i_extra > 0 )
1224                 {
1225                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1226                     memcpy( p_track->fmt.p_extra,
1227                             p_sample->data.p_sample_vide->p_qt_image_description,
1228                             p_track->fmt.i_extra);
1229                 }
1230                 break;
1231             case VLC_FOURCC( 'Q', 'D', 'M', 'C' ):
1232             case VLC_FOURCC( 'Q', 'D', 'M', '2' ):
1233             case VLC_FOURCC( 'Q', 'c', 'l', 'p' ):
1234             case VLC_FOURCC( 's', 'a', 'm', 'r' ):
1235                 p_track->fmt.i_extra =
1236                     p_sample->data.p_sample_soun->i_qt_description;
1237                 if( p_track->fmt.i_extra > 0 )
1238                 {
1239                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1240                     memcpy( p_track->fmt.p_extra,
1241                             p_sample->data.p_sample_soun->p_qt_description,
1242                             p_track->fmt.i_extra);
1243                 }
1244                 break;
1245
1246             /* avc1: send avcC (h264 without annexe B, ie without start code)*/
1247             case VLC_FOURCC( 'a', 'v', 'c', '1' ):
1248             {
1249                 MP4_Box_t *p_avcC = MP4_BoxGet( p_sample, "avcC" );
1250
1251                 if( p_avcC )
1252                 {
1253                     /* Hack: use a packetizer to reecampsulate data in anexe B format */
1254                     msg_Dbg( p_demux, "avcC: size=%d", p_avcC->data.p_avcC->i_avcC );
1255                     p_track->fmt.i_extra = p_avcC->data.p_avcC->i_avcC;
1256                     p_track->fmt.p_extra = malloc( p_avcC->data.p_avcC->i_avcC );
1257                     memcpy( p_track->fmt.p_extra, p_avcC->data.p_avcC->p_avcC, p_track->fmt.i_extra );
1258                     p_track->fmt.b_packetized = VLC_FALSE;
1259                 }
1260                 else
1261                 {
1262                     msg_Err( p_demux, "missing avcC" );
1263                 }
1264                 break;
1265             }
1266
1267             default:
1268                 break;
1269         }
1270     }
1271
1272 #undef p_decconfig
1273
1274     /* some last initialisation */
1275     switch( p_track->fmt.i_cat )
1276     {
1277     case( VIDEO_ES ):
1278         p_track->fmt.video.i_width = p_sample->data.p_sample_vide->i_width;
1279         p_track->fmt.video.i_height = p_sample->data.p_sample_vide->i_height;
1280
1281         /* fall on display size */
1282         if( p_track->fmt.video.i_width <= 0 )
1283             p_track->fmt.video.i_width = p_track->i_width;
1284         if( p_track->fmt.video.i_height <= 0 )
1285             p_track->fmt.video.i_height = p_track->i_height;
1286
1287         /* Find out apect ratio from display size */
1288         if( p_track->i_width > 0 && p_track->i_height > 0 &&
1289             /* Work-around buggy muxed files */
1290             p_sample->data.p_sample_vide->i_width != p_track->i_width )
1291             p_track->fmt.video.i_aspect =
1292                 VOUT_ASPECT_FACTOR * p_track->i_width / p_track->i_height;
1293
1294         break;
1295
1296     case( AUDIO_ES ):
1297         p_track->fmt.audio.i_channels =
1298             p_sample->data.p_sample_soun->i_channelcount;
1299         p_track->fmt.audio.i_rate =
1300             p_sample->data.p_sample_soun->i_sampleratehi;
1301         p_track->fmt.i_bitrate = p_sample->data.p_sample_soun->i_channelcount *
1302             p_sample->data.p_sample_soun->i_sampleratehi *
1303                 p_sample->data.p_sample_soun->i_samplesize;
1304         p_track->fmt.audio.i_bitspersample =
1305             p_sample->data.p_sample_soun->i_samplesize;
1306         break;
1307
1308     default:
1309         break;
1310     }
1311
1312     *pp_es = es_out_Add( p_demux->out, &p_track->fmt );
1313
1314     return VLC_SUCCESS;
1315 }
1316
1317 /* given a time it return sample/chunk
1318  * it also update elst field of the track
1319  */
1320 static int TrackTimeToSampleChunk( demux_t *p_demux, mp4_track_t *p_track,
1321                                    int64_t i_start, uint32_t *pi_chunk,
1322                                    uint32_t *pi_sample )
1323 {
1324     demux_sys_t *p_sys = p_demux->p_sys;
1325     MP4_Box_t   *p_stss;
1326     uint64_t     i_dts;
1327     unsigned int i_sample;
1328     unsigned int i_chunk;
1329     int          i_index;
1330
1331     /* FIXME see if it's needed to check p_track->i_chunk_count */
1332     if( !p_track->b_ok || p_track->i_chunk_count == 0 )
1333     {
1334         return( VLC_EGENERIC );
1335     }
1336
1337     /* handle elst (find the correct one) */
1338     MP4_TrackSetELST( p_demux, p_track, i_start );
1339     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1340     {
1341         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1342         int64_t i_mvt= i_start * p_sys->i_timescale / (int64_t)1000000;
1343
1344         /* now calculate i_start for this elst */
1345         /* offset */
1346         i_start -= p_track->i_elst_time * I64C(1000000) / p_sys->i_timescale;
1347         if( i_start < 0 )
1348         {
1349             *pi_chunk = 0;
1350             *pi_sample= 0;
1351
1352             return VLC_SUCCESS;
1353         }
1354         /* to track time scale */
1355         i_start  = i_start * p_track->i_timescale / (int64_t)1000000;
1356         /* add elst offset */
1357         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
1358              elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
1359             elst->i_media_time[p_track->i_elst] > 0 )
1360         {
1361             i_start += elst->i_media_time[p_track->i_elst];
1362         }
1363
1364         msg_Dbg( p_demux, "elst (%d) gives "I64Fd"ms (movie)-> "I64Fd
1365                  "ms (track)", p_track->i_elst,
1366                  i_mvt * 1000 / p_sys->i_timescale,
1367                  i_start * 1000 / p_track->i_timescale );
1368     }
1369     else
1370     {
1371         /* convert absolute time to in timescale unit */
1372         i_start = i_start * p_track->i_timescale / (int64_t)1000000;
1373     }
1374
1375     /* we start from sample 0/chunk 0, hope it won't take too much time */
1376     /* *** find good chunk *** */
1377     for( i_chunk = 0; ; i_chunk++ )
1378     {
1379         if( i_chunk + 1 >= p_track->i_chunk_count )
1380         {
1381             /* at the end and can't check if i_start in this chunk,
1382                it will be check while searching i_sample */
1383             i_chunk = p_track->i_chunk_count - 1;
1384             break;
1385         }
1386
1387         if( i_start >= p_track->chunk[i_chunk].i_first_dts &&
1388             i_start <  p_track->chunk[i_chunk + 1].i_first_dts )
1389         {
1390             break;
1391         }
1392     }
1393
1394     /* *** find sample in the chunk *** */
1395     i_sample = p_track->chunk[i_chunk].i_sample_first;
1396     i_dts    = p_track->chunk[i_chunk].i_first_dts;
1397     for( i_index = 0; i_sample < p_track->chunk[i_chunk].i_sample_count; )
1398     {
1399         if( i_dts +
1400             p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1401             p_track->chunk[i_chunk].p_sample_delta_dts[i_index] < i_start )
1402         {
1403             i_dts    +=
1404                 p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1405                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1406
1407             i_sample += p_track->chunk[i_chunk].p_sample_count_dts[i_index];
1408             i_index++;
1409         }
1410         else
1411         {
1412             if( p_track->chunk[i_chunk].p_sample_delta_dts[i_index] <= 0 )
1413             {
1414                 break;
1415             }
1416             i_sample += ( i_start - i_dts ) /
1417                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1418             break;
1419         }
1420     }
1421
1422     if( i_sample >= p_track->i_sample_count )
1423     {
1424         msg_Warn( p_demux, "track[Id 0x%x] will be disabled "
1425                   "(seeking too far) chunk=%d sample=%d",
1426                   p_track->i_track_ID, i_chunk, i_sample );
1427         return( VLC_EGENERIC );
1428     }
1429
1430
1431     /* *** Try to find nearest sync points *** */
1432     if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
1433     {
1434         unsigned int i_index;
1435         msg_Dbg( p_demux,
1436                     "track[Id 0x%x] using Sync Sample Box (stss)",
1437                     p_track->i_track_ID );
1438         for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
1439         {
1440             if( p_stss->data.p_stss->i_sample_number[i_index] >= i_sample )
1441             {
1442                 if( i_index > 0 )
1443                 {
1444                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1445                             i_sample,
1446                             p_stss->data.p_stss->i_sample_number[i_index-1] );
1447                     i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
1448                     /* new i_sample is less than old so i_chunk can only decreased */
1449                     while( i_chunk > 0 &&
1450                             i_sample < p_track->chunk[i_chunk].i_sample_first )
1451                     {
1452                         i_chunk--;
1453                     }
1454                 }
1455                 else
1456                 {
1457                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1458                             i_sample,
1459                             p_stss->data.p_stss->i_sample_number[i_index] );
1460                     i_sample = p_stss->data.p_stss->i_sample_number[i_index];
1461                     /* new i_sample is more than old so i_chunk can only increased */
1462                     while( i_chunk < p_track->i_chunk_count - 1 &&
1463                            i_sample >= p_track->chunk[i_chunk].i_sample_first +
1464                              p_track->chunk[i_chunk].i_sample_count )
1465                     {
1466                         i_chunk++;
1467                     }
1468                 }
1469                 break;
1470             }
1471         }
1472     }
1473     else
1474     {
1475         msg_Dbg( p_demux, "track[Id 0x%x] does not provide Sync "
1476                  "Sample Box (stss)", p_track->i_track_ID );
1477     }
1478
1479     *pi_chunk  = i_chunk;
1480     *pi_sample = i_sample;
1481
1482     return VLC_SUCCESS;
1483 }
1484
1485 static int TrackGotoChunkSample( demux_t *p_demux, mp4_track_t *p_track,
1486                                  unsigned int i_chunk, unsigned int i_sample )
1487 {
1488     vlc_bool_t b_reselect = VLC_FALSE;
1489
1490     /* now see if actual es is ok */
1491     if( p_track->i_chunk < 0 ||
1492         p_track->i_chunk >= p_track->i_chunk_count - 1 ||
1493         p_track->chunk[p_track->i_chunk].i_sample_description_index !=
1494             p_track->chunk[i_chunk].i_sample_description_index )
1495     {
1496         msg_Warn( p_demux, "recreate ES for track[Id 0x%x]",
1497                   p_track->i_track_ID );
1498
1499         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
1500                         p_track->p_es, &b_reselect );
1501
1502         es_out_Del( p_demux->out, p_track->p_es );
1503
1504         p_track->p_es = NULL;
1505
1506         if( TrackCreateES( p_demux, p_track, i_chunk, &p_track->p_es ) )
1507         {
1508             msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
1509                      p_track->i_track_ID );
1510
1511             p_track->b_ok       = VLC_FALSE;
1512             p_track->b_selected = VLC_FALSE;
1513             return VLC_EGENERIC;
1514         }
1515     }
1516
1517     /* select again the new decoder */
1518     if( b_reselect )
1519     {
1520         es_out_Control( p_demux->out, ES_OUT_SET_ES, p_track->p_es );
1521     }
1522
1523     p_track->i_chunk    = i_chunk;
1524     p_track->i_sample   = i_sample;
1525
1526     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
1527 }
1528
1529 /****************************************************************************
1530  * MP4_TrackCreate:
1531  ****************************************************************************
1532  * Parse track information and create all needed data to run a track
1533  * If it succeed b_ok is set to 1 else to 0
1534  ****************************************************************************/
1535 static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
1536                              MP4_Box_t *p_box_trak )
1537 {
1538     demux_sys_t *p_sys = p_demux->p_sys;
1539
1540     MP4_Box_t *p_tkhd = MP4_BoxGet( p_box_trak, "tkhd" );
1541     MP4_Box_t *p_tref = MP4_BoxGet( p_box_trak, "tref" );
1542     MP4_Box_t *p_elst;
1543
1544     MP4_Box_t *p_mdhd;
1545     MP4_Box_t *p_hdlr;
1546
1547     MP4_Box_t *p_vmhd;
1548     MP4_Box_t *p_smhd;
1549
1550     MP4_Box_t *p_drms;
1551
1552     unsigned int i;
1553     char language[4];
1554
1555     /* hint track unsuported */
1556
1557     /* set default value (-> track unusable) */
1558     p_track->b_ok       = VLC_FALSE;
1559     p_track->b_enable   = VLC_FALSE;
1560     p_track->b_selected = VLC_FALSE;
1561
1562     es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 );
1563
1564     if( !p_tkhd )
1565     {
1566         return;
1567     }
1568
1569     /* do we launch this track by default ? */
1570     p_track->b_enable =
1571         ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
1572
1573     p_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
1574     p_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
1575     p_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
1576
1577     if( p_tref )
1578     {
1579 /*        msg_Warn( p_demux, "unhandled box: tref --> FIXME" ); */
1580     }
1581
1582     p_mdhd = MP4_BoxGet( p_box_trak, "mdia/mdhd" );
1583     p_hdlr = MP4_BoxGet( p_box_trak, "mdia/hdlr" );
1584
1585     if( ( !p_mdhd )||( !p_hdlr ) )
1586     {
1587         return;
1588     }
1589
1590     p_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
1591
1592     for( i = 0; i < 3; i++ )
1593     {
1594         language[i] = p_mdhd->data.p_mdhd->i_language[i];
1595     }
1596     language[3] = '\0';
1597
1598     switch( p_hdlr->data.p_hdlr->i_handler_type )
1599     {
1600         case( FOURCC_soun ):
1601             if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) )
1602             {
1603                 return;
1604             }
1605             p_track->fmt.i_cat = AUDIO_ES;
1606             break;
1607
1608         case( FOURCC_vide ):
1609             if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) )
1610             {
1611                 return;
1612             }
1613             p_track->fmt.i_cat = VIDEO_ES;
1614             break;
1615
1616         case( FOURCC_text ):
1617         case( FOURCC_subp ):
1618             p_track->fmt.i_cat = SPU_ES;
1619             break;
1620
1621         default:
1622             return;
1623     }
1624
1625     p_track->i_elst = 0;
1626     p_track->i_elst_time = 0;
1627     if( ( p_track->p_elst = p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) )
1628     {
1629         MP4_Box_data_elst_t *elst = p_elst->data.p_elst;
1630         int i;
1631
1632         msg_Warn( p_demux, "elst box found" );
1633         for( i = 0; i < elst->i_entry_count; i++ )
1634         {
1635             msg_Dbg( p_demux, "   - [%d] duration="I64Fd"ms media time="I64Fd"ms) rate=%d.%d",
1636                      i,
1637                      elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
1638                      elst->i_media_time[i] >= 0 ?
1639                         elst->i_media_time[i] * 1000 / p_track->i_timescale : -1,
1640                      elst->i_media_rate_integer[i],
1641                      elst->i_media_rate_fraction[i] );
1642         }
1643     }
1644
1645
1646 /*  TODO
1647     add support for:
1648     p_dinf = MP4_BoxGet( p_minf, "dinf" );
1649 */
1650     if( !( p_track->p_stbl = MP4_BoxGet( p_box_trak,"mdia/minf/stbl" ) ) ||
1651         !( p_track->p_stsd = MP4_BoxGet( p_box_trak,"mdia/minf/stbl/stsd") ) )
1652     {
1653         return;
1654     }
1655
1656     p_drms = MP4_BoxGet( p_track->p_stsd, "drms" );
1657     p_track->b_drms = p_drms != NULL;
1658     p_track->p_drms = p_track->b_drms ?
1659         p_drms->data.p_sample_soun->p_drms : NULL;
1660
1661     /* Set language */
1662     if( strcmp( language, "```" ) && strcmp( language, "und" ) )
1663     {
1664         p_track->fmt.psz_language = strdup( language );
1665     }
1666
1667     /* fxi i_timescale for AUDIO_ES with i_qt_version == 0 */
1668     if( p_track->fmt.i_cat == AUDIO_ES ) //&& p_track->i_sample_size == 1 )
1669     {
1670         MP4_Box_t *p_sample;
1671
1672         p_sample = MP4_BoxGet(  p_track->p_stsd, "[0]" );
1673         if( p_sample && p_sample->data.p_sample_soun)
1674         {
1675             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1676             if( p_soun->i_qt_version == 0 &&
1677                 p_track->i_timescale != p_soun->i_sampleratehi )
1678             {
1679                 msg_Warn( p_demux,
1680                           "i_timescale ("I64Fu") != i_sampleratehi (%u) with "
1681                           "qt_version == 0\n"
1682                           "Making both equal. (report any problem)",
1683                           p_track->i_timescale, p_soun->i_sampleratehi );
1684
1685                 if( p_soun->i_sampleratehi )
1686                     p_track->i_timescale = p_soun->i_sampleratehi;
1687                 else
1688                     p_soun->i_sampleratehi = p_track->i_timescale;
1689             }
1690         }
1691     }
1692
1693     /* Create chunk index table and sample index table */
1694     if( TrackCreateChunksIndex( p_demux,p_track  ) ||
1695         TrackCreateSamplesIndex( p_demux, p_track ) )
1696     {
1697         return; /* cannot create chunks index */
1698     }
1699
1700     p_track->i_chunk  = 0;
1701     p_track->i_sample = 0;
1702
1703     /* now create es */
1704     if( TrackCreateES( p_demux,
1705                        p_track, p_track->i_chunk,
1706                        &p_track->p_es ) )
1707     {
1708         msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
1709                  p_track->i_track_ID );
1710         return;
1711     }
1712
1713 #if 0
1714     {
1715         int i;
1716         for( i = 0; i < p_track->i_chunk_count; i++ )
1717         {
1718             fprintf( stderr, "%-5d sample_count=%d pts=%lld\n",
1719                      i, p_track->chunk[i].i_sample_count,
1720                      p_track->chunk[i].i_first_dts );
1721
1722         }
1723     }
1724 #endif
1725     p_track->b_ok = VLC_TRUE;
1726 }
1727
1728 /****************************************************************************
1729  * MP4_TrackDestroy:
1730  ****************************************************************************
1731  * Destroy a track created by MP4_TrackCreate.
1732  ****************************************************************************/
1733 static void MP4_TrackDestroy( demux_t *p_demux, mp4_track_t *p_track )
1734 {
1735     unsigned int i_chunk;
1736
1737     p_track->b_ok = VLC_FALSE;
1738     p_track->b_enable   = VLC_FALSE;
1739     p_track->b_selected = VLC_FALSE;
1740
1741     es_format_Clean( &p_track->fmt );
1742
1743     for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ )
1744     {
1745         if( p_track->chunk )
1746         {
1747            FREE(p_track->chunk[i_chunk].p_sample_count_dts);
1748            FREE(p_track->chunk[i_chunk].p_sample_delta_dts );
1749         }
1750     }
1751     FREE( p_track->chunk );
1752
1753     if( !p_track->i_sample_size )
1754     {
1755         FREE( p_track->p_sample_size );
1756     }
1757 }
1758
1759 static int MP4_TrackSelect( demux_t *p_demux, mp4_track_t *p_track,
1760                             mtime_t i_start )
1761 {
1762     if( !p_track->b_ok )
1763     {
1764         return VLC_EGENERIC;
1765     }
1766
1767     if( p_track->b_selected )
1768     {
1769         msg_Warn( p_demux, "track[Id 0x%x] already selected",
1770                   p_track->i_track_ID );
1771         return VLC_SUCCESS;
1772     }
1773
1774     return MP4_TrackSeek( p_demux, p_track, i_start );
1775 }
1776
1777 static void MP4_TrackUnselect( demux_t *p_demux, mp4_track_t *p_track )
1778 {
1779     if( !p_track->b_ok )
1780     {
1781         return;
1782     }
1783
1784     if( !p_track->b_selected )
1785     {
1786         msg_Warn( p_demux, "track[Id 0x%x] already unselected",
1787                   p_track->i_track_ID );
1788         return;
1789     }
1790     if( p_track->p_es )
1791     {
1792         es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE,
1793                         p_track->p_es, VLC_FALSE );
1794     }
1795
1796     p_track->b_selected = VLC_FALSE;
1797 }
1798
1799 static int MP4_TrackSeek( demux_t *p_demux, mp4_track_t *p_track,
1800                           mtime_t i_start )
1801 {
1802     uint32_t i_chunk;
1803     uint32_t i_sample;
1804
1805     if( !p_track->b_ok )
1806     {
1807         return( VLC_EGENERIC );
1808     }
1809
1810     p_track->b_selected = VLC_FALSE;
1811
1812     if( TrackTimeToSampleChunk( p_demux, p_track, i_start,
1813                                 &i_chunk, &i_sample ) )
1814     {
1815         msg_Warn( p_demux, "cannot select track[Id 0x%x]",
1816                   p_track->i_track_ID );
1817         return( VLC_EGENERIC );
1818     }
1819
1820     p_track->b_selected = VLC_TRUE;
1821
1822     if( TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) ==
1823         VLC_SUCCESS )
1824     {
1825         p_track->b_selected = VLC_TRUE;
1826     }
1827     return( p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC );
1828 }
1829
1830
1831 /*
1832  * 3 types: for audio
1833  *
1834  */
1835 #define QT_V0_MAX_SAMPLES    1500
1836 static int MP4_TrackSampleSize( mp4_track_t *p_track )
1837 {
1838     int i_size;
1839     MP4_Box_data_sample_soun_t *p_soun;
1840
1841     if( p_track->i_sample_size == 0 )
1842     {
1843         /* most simple case */
1844         return( p_track->p_sample_size[p_track->i_sample] );
1845     }
1846     if( p_track->fmt.i_cat != AUDIO_ES )
1847     {
1848         return( p_track->i_sample_size );
1849     }
1850
1851     if( p_track->i_sample_size != 1 )
1852     {
1853         //msg_Warn( p_demux, "SampleSize != 1" );
1854         return( p_track->i_sample_size );
1855     }
1856
1857     p_soun = p_track->p_sample->data.p_sample_soun;
1858
1859     if( p_soun->i_qt_version == 1 )
1860     {
1861         i_size = p_track->chunk[p_track->i_chunk].i_sample_count / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
1862     }
1863     else
1864     {
1865         /* FIXME */
1866         int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count -
1867                 ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first );
1868         if( i_samples > QT_V0_MAX_SAMPLES )
1869         {
1870             i_samples = QT_V0_MAX_SAMPLES;
1871         }
1872         i_size = i_samples * p_soun->i_channelcount * p_soun->i_samplesize / 8;
1873     }
1874
1875     //fprintf( stderr, "size=%d\n", i_size );
1876     return( i_size );
1877 }
1878
1879
1880 static uint64_t MP4_TrackGetPos( mp4_track_t *p_track )
1881 {
1882     unsigned int i_sample;
1883     uint64_t i_pos;
1884
1885
1886     i_pos = p_track->chunk[p_track->i_chunk].i_offset;
1887
1888     if( p_track->i_sample_size )
1889     {
1890         MP4_Box_data_sample_soun_t *p_soun = p_track->p_sample->data.p_sample_soun;
1891
1892         if( p_soun->i_qt_version == 0 )
1893         {
1894             i_pos += ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ) *
1895                         p_soun->i_channelcount * p_soun->i_samplesize / 8;
1896         }
1897         else
1898         {
1899             /* we read chunk by chunk */
1900             i_pos += 0;
1901         }
1902     }
1903     else
1904     {
1905         for( i_sample = p_track->chunk[p_track->i_chunk].i_sample_first;
1906                 i_sample < p_track->i_sample; i_sample++ )
1907         {
1908             i_pos += p_track->p_sample_size[i_sample];
1909         }
1910
1911     }
1912     return( i_pos );
1913 }
1914
1915 static int  MP4_TrackNextSample( demux_t     *p_demux,
1916                                  mp4_track_t   *p_track )
1917 {
1918
1919     if( p_track->fmt.i_cat == AUDIO_ES &&
1920         p_track->i_sample_size != 0 )
1921     {
1922         MP4_Box_data_sample_soun_t *p_soun;
1923
1924         p_soun = p_track->p_sample->data.p_sample_soun;
1925
1926         if( p_soun->i_qt_version == 1 )
1927         {
1928             /* chunk by chunk */
1929             p_track->i_sample =
1930                 p_track->chunk[p_track->i_chunk].i_sample_first +
1931                 p_track->chunk[p_track->i_chunk].i_sample_count;
1932         }
1933         else
1934         {
1935             /* FIXME */
1936             p_track->i_sample += QT_V0_MAX_SAMPLES;
1937             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 )
1938             {
1939                 p_track->i_sample =
1940                     p_track->chunk[p_track->i_chunk].i_sample_first +
1941                     p_track->chunk[p_track->i_chunk].i_sample_count;
1942             }
1943         }
1944     }
1945     else
1946     {
1947         p_track->i_sample++;
1948     }
1949
1950     if( p_track->i_sample >= p_track->i_sample_count )
1951     {
1952         /* we have reach end of the track so free decoder stuff */
1953         msg_Warn( p_demux, "track[0x%x] will be disabled", p_track->i_track_ID );
1954         MP4_TrackUnselect( p_demux, p_track );
1955         return VLC_EGENERIC;
1956     }
1957
1958     /* Have we changed chunk ? */
1959     if( p_track->i_sample >=
1960             p_track->chunk[p_track->i_chunk].i_sample_first +
1961             p_track->chunk[p_track->i_chunk].i_sample_count )
1962     {
1963         if( TrackGotoChunkSample( p_demux, p_track, p_track->i_chunk + 1,
1964                                   p_track->i_sample ) )
1965         {
1966             msg_Warn( p_demux, "track[0x%x] will be disabled "
1967                       "(cannot restart decoder)", p_track->i_track_ID );
1968             MP4_TrackUnselect( p_demux, p_track );
1969             return VLC_EGENERIC;
1970         }
1971     }
1972
1973     /* Have we changed elst */
1974     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1975     {
1976         demux_sys_t *p_sys = p_demux->p_sys;
1977         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1978         int64_t i_mvt = MP4_TrackGetPTS( p_demux, p_track ) *
1979                         p_sys->i_timescale / (int64_t)1000000;
1980
1981         if( p_track->i_elst < elst->i_entry_count &&
1982             i_mvt >= p_track->i_elst_time +
1983                      elst->i_segment_duration[p_track->i_elst] )
1984         {
1985             MP4_TrackSetELST( p_demux, p_track,
1986                               MP4_TrackGetPTS( p_demux, p_track ) );
1987         }
1988     }
1989
1990     return VLC_SUCCESS;
1991 }
1992
1993 static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk,
1994                               int64_t i_time )
1995 {
1996     demux_sys_t *p_sys = p_demux->p_sys;
1997     int         i_elst_last = tk->i_elst;
1998
1999     /* handle elst (find the correct one) */
2000     tk->i_elst      = 0;
2001     tk->i_elst_time = 0;
2002     if( tk->p_elst && tk->p_elst->data.p_elst->i_entry_count > 0 )
2003     {
2004         MP4_Box_data_elst_t *elst = tk->p_elst->data.p_elst;
2005         int64_t i_mvt= i_time * p_sys->i_timescale / (int64_t)1000000;
2006
2007         for( tk->i_elst = 0; tk->i_elst < elst->i_entry_count; tk->i_elst++ )
2008         {
2009             mtime_t i_dur = elst->i_segment_duration[tk->i_elst];
2010
2011             if( tk->i_elst_time <= i_mvt && i_mvt < tk->i_elst_time + i_dur )
2012             {
2013                 break;
2014             }
2015             tk->i_elst_time += i_dur;
2016         }
2017
2018         if( tk->i_elst >= elst->i_entry_count )
2019         {
2020             /* msg_Dbg( p_demux, "invalid number of entry in elst" ); */
2021             tk->i_elst = elst->i_entry_count - 1;
2022             tk->i_elst_time -= elst->i_segment_duration[tk->i_elst];
2023         }
2024
2025         if( elst->i_media_time[tk->i_elst] < 0 )
2026         {
2027             /* track offset */
2028             tk->i_elst_time += elst->i_segment_duration[tk->i_elst];
2029         }
2030     }
2031     if( i_elst_last != tk->i_elst )
2032     {
2033         msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
2034     }
2035 }