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