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 the VideoLAN team
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_plugin.h>
  33
  34
  35 #include <vlc_demux.h>
  36 #include <vlc_md5.h>
  37 #include <vlc_charset.h>
  38 #include <vlc_iso_lang.h>
  39 #include <vlc_meta.h>
  40 #include <vlc_input.h>
  41
  42 #include "libmp4.h"
  43 #include "drms.h"
  44
  45 #ifdef UNDER_CE
  46 #define uint64_t int64_t
  47 #endif
  48
  49 /*****************************************************************************
  50  * Module descriptor
  51  *****************************************************************************/
  52 static int  Open ( vlc_object_t * );
  53 static void Close( vlc_object_t * );
  54
  55 vlc_module_begin();
  56     set_category( CAT_INPUT );
  57     set_subcategory( SUBCAT_INPUT_DEMUX );
  58     set_description( N_("MP4 stream demuxer") );
  59     set_capability( "demux", 242 );
  60     set_callbacks( Open, Close );
  61 vlc_module_end();
  62
  63 /*****************************************************************************
  64  * Local prototypes
  65  *****************************************************************************/
  66 static int   Demux   ( demux_t * );
  67 static int   DemuxRef( demux_t *p_demux ){ (void)p_demux; return 0;}
  68 static int   Seek    ( demux_t *, mtime_t );
  69 static int   Control ( demux_t *, int, va_list );
  70
  71 /* Contain all information about a chunk */
  72 typedef struct
  73 {
  74     uint64_t     i_offset; /* absolute position of this chunk in the file */
  75     uint32_t     i_sample_description_index; /* index for SampleEntry to use */
  76     uint32_t     i_sample_count; /* how many samples in this chunk */
  77     uint32_t     i_sample_first; /* index of the first sample in this chunk */
  78
  79     /* now provide way to calculate pts, dts, and offset without to
  80         much memory and with fast acces */
  81
  82     /* with this we can calculate dts/pts without waste memory */
  83     uint64_t     i_first_dts;
  84     uint32_t     *p_sample_count_dts;
  85     uint32_t     *p_sample_delta_dts;   /* dts delta */
  86
  87     uint32_t     *p_sample_count_pts;
  88     int32_t      *p_sample_offset_pts;  /* pts-dts */
  89
  90     /* TODO if needed add pts
  91         but quickly *add* support for edts and seeking */
  92
  93 } mp4_chunk_t;
  94
  95  /* Contain all needed information for read all track with vlc */
  96 typedef struct
  97 {
  98     unsigned int i_track_ID;/* this should be unique */
  99
 100     int b_ok;               /* The track is usable */
 101     int b_enable;           /* is the trak enable by default */
 102     bool b_selected;  /* is the trak being played */
 103     bool b_chapter;   /* True when used for chapter only */
 104
 105     bool b_mac_encoding;
 106
 107     es_format_t fmt;
 108     es_out_id_t *p_es;
 109
 110     /* display size only ! */
 111     int i_width;
 112     int i_height;
 113
 114     /* more internal data */
 115     uint64_t        i_timescale;    /* time scale for this track only */
 116
 117     /* elst */
 118     int             i_elst;         /* current elst */
 119     int64_t         i_elst_time;    /* current elst start time (in movie time scale)*/
 120     MP4_Box_t       *p_elst;        /* elst (could be NULL) */
 121
 122     /* give the next sample to read, i_chunk is to find quickly where
 123       the sample is located */
 124     uint32_t         i_sample;       /* next sample to read */
 125     uint32_t         i_chunk;        /* chunk where next sample is stored */
 126     /* total count of chunk and sample */
 127     uint32_t         i_chunk_count;
 128     uint32_t         i_sample_count;
 129
 130     mp4_chunk_t    *chunk; /* always defined  for each chunk */
 131
 132     /* sample size, p_sample_size defined only if i_sample_size == 0
 133         else i_sample_size is size for all sample */
 134     uint32_t         i_sample_size;
 135     uint32_t         *p_sample_size; /* XXX perhaps add file offset if take
 136                                     too much time to do sumations each time*/
 137
 138     MP4_Box_t *p_stbl;  /* will contain all timing information */
 139     MP4_Box_t *p_stsd;  /* will contain all data to initialize decoder */
 140     MP4_Box_t *p_sample;/* point on actual sdsd */
 141
 142     bool b_drms;
 143     void      *p_drms;
 144
 145 } mp4_track_t;
 146
 147
 148 struct demux_sys_t
 149 {
 150     MP4_Box_t    *p_root;      /* container for the whole file */
 151
 152     mtime_t      i_pcr;
 153
 154     uint64_t     i_time;         /* time position of the presentation
 155                                   * in movie timescale */
 156     uint64_t     i_timescale;    /* movie time scale */
 157     uint64_t     i_duration;     /* movie duration */
 158     unsigned int i_tracks;       /* number of tracks */
 159     mp4_track_t  *track;         /* array of track */
 160
 161     /* */
 162     MP4_Box_t    *p_tref_chap;
 163
 164     /* */
 165     input_title_t *p_title;
 166 };
 167
 168 /*****************************************************************************
 169  * Declaration of local function
 170  *****************************************************************************/
 171 static void MP4_TrackCreate ( demux_t *, mp4_track_t *, MP4_Box_t  *, bool b_force_enable );
 172 static void MP4_TrackDestroy(  mp4_track_t * );
 173
 174 static int  MP4_TrackSelect ( demux_t *, mp4_track_t *, mtime_t );
 175 static void MP4_TrackUnselect(demux_t *, mp4_track_t * );
 176
 177 static int  MP4_TrackSeek   ( demux_t *, mp4_track_t *, mtime_t );
 178
 179 static uint64_t MP4_TrackGetPos    ( mp4_track_t * );
 180 static int      MP4_TrackSampleSize( mp4_track_t * );
 181 static int      MP4_TrackNextSample( demux_t *, mp4_track_t * );
 182 static void     MP4_TrackSetELST( demux_t *, mp4_track_t *, int64_t );
 183
 184 static void     MP4_UpdateSeekpoint( demux_t * );
 185 static const char *MP4_ConvertMacCode( uint16_t );
 186
 187 /* Return time in s of a track */
 188 static inline int64_t MP4_TrackGetDTS( demux_t *p_demux, mp4_track_t *p_track )
 189 {
 190 #define chunk p_track->chunk[p_track->i_chunk]
 191
 192     unsigned int i_index = 0;
 193     unsigned int i_sample = p_track->i_sample - chunk.i_sample_first;
 194     int64_t i_dts = chunk.i_first_dts;
 195
 196     while( i_sample > 0 )
 197     {
 198         if( i_sample > chunk.p_sample_count_dts[i_index] )
 199         {
 200             i_dts += chunk.p_sample_count_dts[i_index] *
 201                 chunk.p_sample_delta_dts[i_index];
 202             i_sample -= chunk.p_sample_count_dts[i_index];
 203             i_index++;
 204         }
 205         else
 206         {
 207             i_dts += i_sample * chunk.p_sample_delta_dts[i_index];
 208             i_sample = 0;
 209             break;
 210         }
 211     }
 212
 213 #undef chunk
 214
 215     /* now handle elst */
 216     if( p_track->p_elst )
 217     {
 218         demux_sys_t         *p_sys = p_demux->p_sys;
 219         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
 220
 221         /* convert to offset */
 222         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
 223               elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
 224             elst->i_media_time[p_track->i_elst] > 0 )
 225         {
 226             i_dts -= elst->i_media_time[p_track->i_elst];
 227         }
 228
 229         /* add i_elst_time */
 230         i_dts += p_track->i_elst_time * p_track->i_timescale /
 231             p_sys->i_timescale;
 232
 233         if( i_dts < 0 ) i_dts = 0;
 234     }
 235
 236     return INT64_C(1000000) * i_dts / p_track->i_timescale;
 237 }
 238
 239 static inline int64_t MP4_TrackGetPTSDelta( mp4_track_t *p_track )
 240 {
 241     mp4_chunk_t *ck = &p_track->chunk[p_track->i_chunk];
 242     unsigned int i_index = 0;
 243     unsigned int i_sample = p_track->i_sample - ck->i_sample_first;
 244
 245     if( ck->p_sample_count_pts == NULL || ck->p_sample_offset_pts == NULL )
 246         return -1;
 247
 248     for( i_index = 0;; i_index++ )
 249     {
 250         if( i_sample < ck->p_sample_count_pts[i_index] )
 251             return ck->p_sample_offset_pts[i_index] * INT64_C(1000000) /
 252                    (int64_t)p_track->i_timescale;
 253
 254         i_sample -= ck->p_sample_count_pts[i_index];
 255     }
 256 }
 257
 258 static inline int64_t MP4_GetMoviePTS(demux_sys_t *p_sys )
 259 {
 260     return INT64_C(1000000) * p_sys->i_time / p_sys->i_timescale;
 261 }
 262
 263 static void LoadChapter( demux_t  *p_demux );
 264
 265 /*****************************************************************************
 266  * Open: check file and initializes MP4 structures
 267  *****************************************************************************/
 268 static int Open( vlc_object_t * p_this )
 269 {
 270     demux_t  *p_demux = (demux_t *)p_this;
 271     demux_sys_t     *p_sys;
 272
 273     const uint8_t   *p_peek;
 274
 275     MP4_Box_t       *p_ftyp;
 276     MP4_Box_t       *p_rmra;
 277     MP4_Box_t       *p_mvhd;
 278     MP4_Box_t       *p_trak;
 279
 280     unsigned int    i;
 281     bool      b_seekable;
 282     bool      b_enabled_es;
 283
 284     /* A little test to see if it could be a mp4 */
 285     if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 ) return VLC_EGENERIC;
 286
 287     switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
 288     {
 289         case FOURCC_ftyp:
 290         case FOURCC_moov:
 291         case FOURCC_foov:
 292         case FOURCC_moof:
 293         case FOURCC_mdat:
 294         case FOURCC_udta:
 295         case FOURCC_free:
 296         case FOURCC_skip:
 297         case FOURCC_wide:
 298         case VLC_FOURCC( 'p', 'n', 'o', 't' ):
 299             break;
 300          default:
 301             return VLC_EGENERIC;
 302     }
 303
 304     /* I need to seek */
 305     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
 306     if( !b_seekable )
 307     {
 308         msg_Warn( p_demux, "MP4 plugin discarded (unseekable)" );
 309         return VLC_EGENERIC;
 310     }
 311
 312     /*Set exported functions */
 313     p_demux->pf_demux = Demux;
 314     p_demux->pf_control = Control;
 315
 316     /* create our structure that will contains all data */
 317     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 318     memset( p_sys, 0, sizeof( demux_sys_t ) );
 319
 320     /* Now load all boxes ( except raw data ) */
 321     if( ( p_sys->p_root = MP4_BoxGetRoot( p_demux->s ) ) == NULL )
 322     {
 323         msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
 324         goto error;
 325     }
 326
 327     MP4_BoxDumpStructure( p_demux->s, p_sys->p_root );
 328
 329     if( ( p_ftyp = MP4_BoxGet( p_sys->p_root, "/ftyp" ) ) )
 330     {
 331         switch( p_ftyp->data.p_ftyp->i_major_brand )
 332         {
 333             case( FOURCC_isom ):
 334                 msg_Dbg( p_demux,
 335                          "ISO Media file (isom) version %d.",
 336                          p_ftyp->data.p_ftyp->i_minor_version );
 337                 break;
 338             default:
 339                 msg_Dbg( p_demux,
 340                          "unrecognized major file specification (%4.4s).",
 341                           (char*)&p_ftyp->data.p_ftyp->i_major_brand );
 342                 break;
 343         }
 344     }
 345     else
 346     {
 347         msg_Dbg( p_demux, "file type box missing (assuming ISO Media file)" );
 348     }
 349
 350     /* the file need to have one moov box */
 351     if( MP4_BoxCount( p_sys->p_root, "/moov" ) <= 0 )
 352     {
 353         MP4_Box_t *p_foov = MP4_BoxGet( p_sys->p_root, "/foov" );
 354
 355         if( !p_foov )
 356         {
 357             msg_Err( p_demux, "MP4 plugin discarded (no moov box)" );
 358             goto error;
 359         }
 360         /* we have a free box as a moov, rename it */
 361         p_foov->i_type = FOURCC_moov;
 362     }
 363
 364     if( ( p_rmra = MP4_BoxGet( p_sys->p_root,  "/moov/rmra" ) ) )
 365     {
 366         int        i_count = MP4_BoxCount( p_rmra, "rmda" );
 367         int        i;
 368
 369         msg_Dbg( p_demux, "detected playlist mov file (%d ref)", i_count );
 370
 371         input_thread_t * p_input = vlc_object_find( p_demux, VLC_OBJECT_INPUT, FIND_PARENT );
 372         input_item_t * p_current = input_GetItem( p_input );
 373         p_current->i_type = ITEM_TYPE_PLAYLIST;
 374
 375         for( i = 0; i < i_count; i++ )
 376         {
 377             MP4_Box_t *p_rdrf = MP4_BoxGet( p_rmra, "rmda[%d]/rdrf", i );
 378             char      *psz_ref;
 379             uint32_t  i_ref_type;
 380
 381             if( !p_rdrf || !( psz_ref = strdup( p_rdrf->data.p_rdrf->psz_ref ) ) )
 382             {
 383                 continue;
 384             }
 385             i_ref_type = p_rdrf->data.p_rdrf->i_ref_type;
 386
 387             msg_Dbg( p_demux, "new ref=`%s' type=%4.4s",
 388                      psz_ref, (char*)&i_ref_type );
 389
 390             if( i_ref_type == VLC_FOURCC( 'u', 'r', 'l', ' ' ) )
 391             {
 392                 if( strstr( psz_ref, "qt5gateQT" ) )
 393                 {
 394                     msg_Dbg( p_demux, "ignoring pseudo ref =`%s'", psz_ref );
 395                     continue;
 396                 }
 397                 if( !strncmp( psz_ref, "http://", 7 ) ||
 398                     !strncmp( psz_ref, "rtsp://", 7 ) )
 399                 {
 400                     ;
 401                 }
 402                 else
 403                 {
 404                     char *psz_absolute;
 405                     char *psz_path = strdup( p_demux->psz_path );
 406                     char *end = strrchr( psz_path, '/' );
 407                     if( end ) end[1] = '\0';
 408                     else *psz_path = '\0';
 409
 410                     if( asprintf( &psz_absolute, "%s://%s%s",
 411                                   p_demux->psz_access, psz_path, psz_ref ) < 0 )
 412                         return VLC_ENOMEM;
 413
 414                     free( psz_ref );
 415                     psz_ref = psz_absolute;
 416                     free( psz_path );
 417                 }
 418                 input_item_t *p_input;
 419                 msg_Dbg( p_demux, "adding ref = `%s'", psz_ref );
 420                 p_input = input_item_NewExt( p_demux, psz_ref, NULL,
 421                                     0, NULL, -1 );
 422                 input_item_CopyOptions( p_current, p_input );
 423                 input_item_AddSubItem( p_current, p_input );
 424                 vlc_gc_decref( p_input );
 425             }
 426             else
 427             {
 428                 msg_Err( p_demux, "unknown ref type=%4.4s FIXME (send a bug report)",
 429                          (char*)&p_rdrf->data.p_rdrf->i_ref_type );
 430             }
 431             free( psz_ref );
 432         }
 433         vlc_object_release( p_input );
 434     }
 435
 436     if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) )
 437     {
 438         if( !p_rmra )
 439         {
 440             msg_Err( p_demux, "cannot find /moov/mvhd" );
 441             goto error;
 442         }
 443         else
 444         {
 445             msg_Warn( p_demux, "cannot find /moov/mvhd (pure ref file)" );
 446             p_demux->pf_demux = DemuxRef;
 447             return VLC_SUCCESS;
 448         }
 449     }
 450     else
 451     {
 452         p_sys->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 453         if( p_sys->i_timescale == 0 )
 454         {
 455             msg_Err( p_this, "bad timescale" );
 456             goto error;
 457         }
 458         p_sys->i_duration = p_mvhd->data.p_mvhd->i_duration;
 459     }
 460
 461     if( !( p_sys->i_tracks = MP4_BoxCount( p_sys->p_root, "/moov/trak" ) ) )
 462     {
 463         msg_Err( p_demux, "cannot find any /moov/trak" );
 464         goto error;
 465     }
 466     msg_Dbg( p_demux, "found %d track%c",
 467                         p_sys->i_tracks,
 468                         p_sys->i_tracks ? 's':' ' );
 469
 470     /* allocate memory */
 471     p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
 472     if( p_sys->track == NULL )
 473         goto error;
 474     memset( p_sys->track, 0, p_sys->i_tracks * sizeof( mp4_track_t ) );
 475
 476     /* Search the first chap reference (like quicktime) and
 477      * check that at least 1 stream is enabled */
 478     p_sys->p_tref_chap = NULL;
 479     b_enabled_es = false;
 480     for( i = 0; i < p_sys->i_tracks; i++ )
 481     {
 482         MP4_Box_t *p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 483
 484
 485         MP4_Box_t *p_tkhd = MP4_BoxGet( p_trak, "tkhd" );
 486         if( p_tkhd && (p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED) )
 487             b_enabled_es = true;
 488
 489         MP4_Box_t *p_chap = MP4_BoxGet( p_trak, "tref/chap", i );
 490         if( p_chap && p_chap->data.p_tref_generic->i_entry_count > 0 && !p_sys->p_tref_chap )
 491             p_sys->p_tref_chap = p_chap;
 492     }
 493
 494     /* now process each track and extract all usefull information */
 495     for( i = 0; i < p_sys->i_tracks; i++ )
 496     {
 497         p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 498         MP4_TrackCreate( p_demux, &p_sys->track[i], p_trak, !b_enabled_es );
 499
 500         if( p_sys->track[i].b_ok && !p_sys->track[i].b_chapter )
 501         {
 502             const char *psz_cat;
 503             switch( p_sys->track[i].fmt.i_cat )
 504             {
 505                 case( VIDEO_ES ):
 506                     psz_cat = "video";
 507                     break;
 508                 case( AUDIO_ES ):
 509                     psz_cat = "audio";
 510                     break;
 511                 case( SPU_ES ):
 512                     psz_cat = "subtitle";
 513                     break;
 514
 515                 default:
 516                     psz_cat = "unknown";
 517                     break;
 518             }
 519
 520             msg_Dbg( p_demux, "adding track[Id 0x%x] %s (%s) language %s",
 521                      p_sys->track[i].i_track_ID, psz_cat,
 522                      p_sys->track[i].b_enable ? "enable":"disable",
 523                      p_sys->track[i].fmt.psz_language ?
 524                      p_sys->track[i].fmt.psz_language : "undef" );
 525         }
 526         else if( p_sys->track[i].b_ok && p_sys->track[i].b_chapter )
 527         {
 528             msg_Dbg( p_demux, "using track[Id 0x%x] for chapter language %s",
 529                      p_sys->track[i].i_track_ID,
 530                      p_sys->track[i].fmt.psz_language ?
 531                      p_sys->track[i].fmt.psz_language : "undef" );
 532         }
 533         else
 534         {
 535             msg_Dbg( p_demux, "ignoring track[Id 0x%x]",
 536                      p_sys->track[i].i_track_ID );
 537         }
 538     }
 539
 540     /* */
 541     LoadChapter( p_demux );
 542
 543     return VLC_SUCCESS;
 544
 545 error:
 546     if( p_sys->p_root )
 547     {
 548         MP4_BoxFree( p_demux->s, p_sys->p_root );
 549     }
 550     free( p_sys );
 551     return VLC_EGENERIC;
 552 }
 553
 554 /*****************************************************************************
 555  * Demux: read packet and send them to decoders
 556  *****************************************************************************
 557  * TODO check for newly selected track (ie audio upt to now )
 558  *****************************************************************************/
 559 static int Demux( demux_t *p_demux )
 560 {
 561     demux_sys_t *p_sys = p_demux->p_sys;
 562     unsigned int i_track;
 563
 564
 565     unsigned int i_track_selected;
 566
 567     /* check for newly selected/unselected track */
 568     for( i_track = 0, i_track_selected = 0; i_track < p_sys->i_tracks;
 569          i_track++ )
 570     {
 571         mp4_track_t *tk = &p_sys->track[i_track];
 572         bool b;
 573
 574         if( !tk->b_ok || tk->b_chapter ||
 575             ( tk->b_selected && tk->i_sample >= tk->i_sample_count ) )
 576         {
 577             continue;
 578         }
 579
 580         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 581
 582         if( tk->b_selected && !b )
 583         {
 584             MP4_TrackUnselect( p_demux, tk );
 585         }
 586         else if( !tk->b_selected && b)
 587         {
 588             MP4_TrackSelect( p_demux, tk, MP4_GetMoviePTS( p_sys ) );
 589         }
 590
 591         if( tk->b_selected )
 592         {
 593             i_track_selected++;
 594         }
 595     }
 596
 597     if( i_track_selected <= 0 )
 598     {
 599         p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 600         if( p_sys->i_timescale > 0 )
 601         {
 602             int64_t i_length = (mtime_t)1000000 *
 603                                (mtime_t)p_sys->i_duration /
 604                                (mtime_t)p_sys->i_timescale;
 605             if( MP4_GetMoviePTS( p_sys ) >= i_length )
 606                 return 0;
 607             return 1;
 608         }
 609
 610         msg_Warn( p_demux, "no track selected, exiting..." );
 611         return 0;
 612     }
 613
 614     /* */
 615     MP4_UpdateSeekpoint( p_demux );
 616
 617     /* first wait for the good time to read a packet */
 618     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr + 1 );
 619
 620     p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
 621
 622     /* we will read 100ms for each stream so ...*/
 623     p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 624
 625     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 626     {
 627         mp4_track_t *tk = &p_sys->track[i_track];
 628
 629         if( !tk->b_ok || tk->b_chapter || !tk->b_selected || tk->i_sample >= tk->i_sample_count )
 630             continue;
 631
 632         while( MP4_TrackGetDTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
 633         {
 634 #if 0
 635             msg_Dbg( p_demux, "tk(%i)=%lld mv=%lld", i_track,
 636                      MP4_TrackGetDTS( p_demux, tk ),
 637                      MP4_GetMoviePTS( p_sys ) );
 638 #endif
 639
 640             if( MP4_TrackSampleSize( tk ) > 0 )
 641             {
 642                 block_t *p_block;
 643                 int64_t i_delta;
 644
 645                 /* go,go go ! */
 646                 if( stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
 647                 {
 648                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)",
 649                               tk->i_track_ID );
 650                     MP4_TrackUnselect( p_demux, tk );
 651                     break;
 652                 }
 653
 654                 /* now read pes */
 655                 if( !(p_block =
 656                          stream_Block( p_demux->s, MP4_TrackSampleSize(tk) )) )
 657                 {
 658                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)",
 659                               tk->i_track_ID );
 660                     MP4_TrackUnselect( p_demux, tk );
 661                     break;
 662                 }
 663
 664                 if( tk->b_drms && tk->p_drms )
 665                 {
 666                     drms_decrypt( tk->p_drms, (uint32_t*)p_block->p_buffer,
 667                                   p_block->i_buffer );
 668                 }
 669                 else if( tk->fmt.i_cat == SPU_ES )
 670                 {
 671                     if( tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) &&
 672                         p_block->i_buffer >= 2 )
 673                     {
 674                         uint16_t i_size = GetWBE( p_block->p_buffer );
 675
 676                         if( i_size + 2 <= p_block->i_buffer )
 677                         {
 678                             char *p;
 679                             /* remove the length field, and append a '\0' */
 680                             memmove( &p_block->p_buffer[0],
 681                                      &p_block->p_buffer[2], i_size );
 682                             p_block->p_buffer[i_size] = '\0';
 683                             p_block->i_buffer = i_size + 1;
 684
 685                             /* convert \r -> \n */
 686                             while( ( p = strchr((char *) p_block->p_buffer, '\r' ) ) )
 687                             {
 688                                 *p = '\n';
 689                             }
 690                         }
 691                         else
 692                         {
 693                             /* Invalid */
 694                             p_block->i_buffer = 0;
 695                         }
 696                     }
 697                 }
 698                 /* dts */
 699                 p_block->i_dts = MP4_TrackGetDTS( p_demux, tk ) + 1;
 700                 /* pts */
 701                 i_delta = MP4_TrackGetPTSDelta( tk );
 702                 if( i_delta != -1 )
 703                     p_block->i_pts = p_block->i_dts + i_delta;
 704                 else if( tk->fmt.i_cat != VIDEO_ES )
 705                     p_block->i_pts = p_block->i_dts;
 706                 else
 707                     p_block->i_pts = 0;
 708
 709                 if( !tk->b_drms || ( tk->b_drms && tk->p_drms ) )
 710                     es_out_Send( p_demux->out, tk->p_es, p_block );
 711             }
 712
 713             /* Next sample */
 714             if( MP4_TrackNextSample( p_demux, tk ) )
 715                 break;
 716         }
 717     }
 718
 719     return 1;
 720 }
 721
 722 static void MP4_UpdateSeekpoint( demux_t *p_demux )
 723 {
 724     demux_sys_t *p_sys = p_demux->p_sys;
 725     int64_t i_time;
 726     int i;
 727     if( !p_sys->p_title )
 728         return;
 729     i_time = MP4_GetMoviePTS( p_sys );
 730     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 731     {
 732         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 733             break;
 734     }
 735     i--;
 736
 737     if( i != p_demux->info.i_seekpoint && i >= 0 )
 738     {
 739         p_demux->info.i_seekpoint = i;
 740         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 741     }
 742 }
 743 /*****************************************************************************
 744  * Seek: Got to i_date
 745 ******************************************************************************/
 746 static int Seek( demux_t *p_demux, mtime_t i_date )
 747 {
 748     demux_sys_t *p_sys = p_demux->p_sys;
 749     unsigned int i_track;
 750
 751     /* First update update global time */
 752     p_sys->i_time = i_date * p_sys->i_timescale / 1000000;
 753     p_sys->i_pcr  = i_date;
 754
 755     /* Now for each stream try to go to this time */
 756     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 757     {
 758         mp4_track_t *tk = &p_sys->track[i_track];
 759         MP4_TrackSeek( p_demux, tk, i_date );
 760     }
 761     MP4_UpdateSeekpoint( p_demux );
 762
 763     es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_date );
 764
 765     return VLC_SUCCESS;
 766 }
 767
 768 /*****************************************************************************
 769  * Control:
 770  *****************************************************************************/
 771 static int Control( demux_t *p_demux, int i_query, va_list args )
 772 {
 773     demux_sys_t *p_sys = p_demux->p_sys;
 774
 775     double f, *pf;
 776     int64_t i64, *pi64;
 777
 778     switch( i_query )
 779     {
 780         case DEMUX_GET_POSITION:
 781             pf = (double*)va_arg( args, double * );
 782             if( p_sys->i_duration > 0 )
 783             {
 784                 *pf = (double)p_sys->i_time / (double)p_sys->i_duration;
 785             }
 786             else
 787             {
 788                 *pf = 0.0;
 789             }
 790             return VLC_SUCCESS;
 791
 792         case DEMUX_SET_POSITION:
 793             f = (double)va_arg( args, double );
 794             if( p_sys->i_timescale > 0 )
 795             {
 796                 i64 = (int64_t)( f * (double)1000000 *
 797                                  (double)p_sys->i_duration /
 798                                  (double)p_sys->i_timescale );
 799                 return Seek( p_demux, i64 );
 800             }
 801             else return VLC_SUCCESS;
 802
 803         case DEMUX_GET_TIME:
 804             pi64 = (int64_t*)va_arg( args, int64_t * );
 805             if( p_sys->i_timescale > 0 )
 806             {
 807                 *pi64 = (mtime_t)1000000 *
 808                         (mtime_t)p_sys->i_time /
 809                         (mtime_t)p_sys->i_timescale;
 810             }
 811             else *pi64 = 0;
 812             return VLC_SUCCESS;
 813
 814         case DEMUX_SET_TIME:
 815             i64 = (int64_t)va_arg( args, int64_t );
 816             return Seek( p_demux, i64 );
 817
 818         case DEMUX_GET_LENGTH:
 819             pi64 = (int64_t*)va_arg( args, int64_t * );
 820             if( p_sys->i_timescale > 0 )
 821             {
 822                 *pi64 = (mtime_t)1000000 *
 823                         (mtime_t)p_sys->i_duration /
 824                         (mtime_t)p_sys->i_timescale;
 825             }
 826             else *pi64 = 0;
 827             return VLC_SUCCESS;
 828
 829         case DEMUX_GET_FPS:
 830             msg_Warn( p_demux, "DEMUX_GET_FPS unimplemented !!" );
 831             return VLC_EGENERIC;
 832
 833         case DEMUX_GET_META:
 834         {
 835             vlc_meta_t *p_meta = (vlc_meta_t *)va_arg( args, vlc_meta_t*);
 836             MP4_Box_t  *p_0xa9xxx;
 837
 838             MP4_Box_t  *p_udta = MP4_BoxGet( p_sys->p_root, "/moov/udta/meta/ilst" );
 839             if( p_udta == NULL )
 840             {
 841                 p_udta = MP4_BoxGet( p_sys->p_root, "/moov/udta" );
 842                 if( p_udta == NULL )
 843                 {
 844                     return VLC_EGENERIC;
 845                 }
 846             }
 847
 848             for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
 849                  p_0xa9xxx = p_0xa9xxx->p_next )
 850             {
 851
 852                 if( !p_0xa9xxx || !p_0xa9xxx->data.p_0xa9xxx )
 853                     continue;
 854
 855                 /* FIXME FIXME: should convert from whatever the character
 856                  * encoding of MP4 meta data is to UTF-8. */
 857 #define SET(fct) do { char *psz_utf = strdup( p_0xa9xxx->data.p_0xa9xxx->psz_text ? p_0xa9xxx->data.p_0xa9xxx->psz_text : "" ); \
 858     if( psz_utf ) { EnsureUTF8( psz_utf );  \
 859                     fct( p_meta, psz_utf ); free( psz_utf ); } } while(0)
 860
 861                 /* XXX Becarefull p_udta can have box that are not 0xa9xx */
 862                 switch( p_0xa9xxx->i_type )
 863                 {
 864                 case FOURCC_0xa9nam: /* Full name */
 865                     SET( vlc_meta_SetTitle );
 866                     break;
 867                 case FOURCC_0xa9aut:
 868                     SET( vlc_meta_SetArtist );
 869                     break;
 870                 case FOURCC_0xa9ART:
 871                     SET( vlc_meta_SetArtist );
 872                     break;
 873                 case FOURCC_0xa9cpy:
 874                     SET( vlc_meta_SetCopyright );
 875                     break;
 876                 case FOURCC_0xa9day: /* Creation Date */
 877                     SET( vlc_meta_SetDate );
 878                     break;
 879                 case FOURCC_0xa9des: /* Description */
 880                     SET( vlc_meta_SetDescription );
 881                     break;
 882                 case FOURCC_0xa9gen: /* Genre */
 883                     SET( vlc_meta_SetGenre );
 884                     break;
 885
 886                 case FOURCC_0xa9alb: /* Album */
 887                     SET( vlc_meta_SetAlbum );
 888                     break;
 889
 890                 case FOURCC_0xa9trk: /* Track */
 891                     SET( vlc_meta_SetTracknum );
 892                     break;
 893
 894                 case FOURCC_0xa9cmt: /* Commment */
 895                     SET( vlc_meta_SetDescription );
 896                     break;
 897
 898                 case FOURCC_0xa9url: /* URL */
 899                     SET( vlc_meta_SetURL );
 900                     break;
 901
 902                 case FOURCC_0xa9enc: /* Encoded By */
 903                     SET( vlc_meta_SetEncodedBy );
 904                     break;
 905
 906                 case FOURCC_0xa9swr:
 907                 case FOURCC_0xa9inf: /* Information */
 908                 case FOURCC_0xa9dir: /* Director */
 909                 case FOURCC_0xa9dis: /* Disclaimer */
 910                 case FOURCC_0xa9req: /* Requirements */
 911                 case FOURCC_0xa9fmt: /* Original Format */
 912                 case FOURCC_0xa9dsa: /* Display Source As */
 913                 case FOURCC_0xa9hst: /* Host Computer */
 914                 case FOURCC_0xa9prd: /* Producer */
 915                 case FOURCC_0xa9prf: /* Performers */
 916                 case FOURCC_0xa9ope: /* Original Performer */
 917                 case FOURCC_0xa9src: /* Providers Source Content */
 918                 case FOURCC_0xa9wrt: /* Writer */
 919                 case FOURCC_0xa9com: /* Composer */
 920                 case FOURCC_WLOC:    /* Window Location */
 921                     /* TODO one day, but they aren't really meaningfull */
 922                     break;
 923 #undef SET
 924
 925                 default:
 926                     break;
 927                 }
 928             }
 929             return VLC_SUCCESS;
 930         }
 931
 932         case DEMUX_GET_TITLE_INFO:
 933         {
 934             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 935             int *pi_int    = (int*)va_arg( args, int* );
 936             int *pi_title_offset = (int*)va_arg( args, int* );
 937             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 938
 939             if( !p_sys->p_title )
 940                 return VLC_EGENERIC;
 941
 942             *pi_int = 1;
 943             *ppp_title = malloc( sizeof( input_title_t**) );
 944             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 945             *pi_title_offset = 0;
 946             *pi_seekpoint_offset = 0;
 947             return VLC_SUCCESS;
 948         }
 949         case DEMUX_SET_TITLE:
 950         {
 951             const int i_title = (int)va_arg( args, int );
 952             if( !p_sys->p_title || i_title != 0 )
 953                 return VLC_EGENERIC;
 954             return VLC_SUCCESS;
 955         }
 956         case DEMUX_SET_SEEKPOINT:
 957         {
 958             const int i_seekpoint = (int)va_arg( args, int );
 959             if( !p_sys->p_title )
 960                 return VLC_EGENERIC;
 961             return Seek( p_demux, p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset );
 962         }
 963
 964         case DEMUX_SET_NEXT_DEMUX_TIME:
 965         case DEMUX_SET_GROUP:
 966         case DEMUX_HAS_UNSUPPORTED_META:
 967         case DEMUX_GET_ATTACHMENTS:
 968             return VLC_EGENERIC;
 969
 970         default:
 971             msg_Warn( p_demux, "control query %u unimplemented", i_query );
 972             return VLC_EGENERIC;
 973     }
 974 }
 975
 976 /*****************************************************************************
 977  * Close: frees unused data
 978  *****************************************************************************/
 979 static void Close ( vlc_object_t * p_this )
 980 {
 981     demux_t *  p_demux = (demux_t *)p_this;
 982     demux_sys_t *p_sys = p_demux->p_sys;
 983     unsigned int i_track;
 984
 985     msg_Dbg( p_demux, "freeing all memory" );
 986
 987     MP4_BoxFree( p_demux->s, p_sys->p_root );
 988     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 989     {
 990         MP4_TrackDestroy(  &p_sys->track[i_track] );
 991     }
 992     FREENULL( p_sys->track );
 993
 994     if( p_sys->p_title )
 995         vlc_input_title_Delete( p_sys->p_title );
 996
 997     free( p_sys );
 998 }
 999
1000
1001
1002 /****************************************************************************
1003  * Local functions, specific to vlc
1004  ****************************************************************************/
1005 /* Chapters */
1006 static void LoadChapterGpac( demux_t  *p_demux, MP4_Box_t *p_chpl )
1007 {
1008     demux_sys_t *p_sys = p_demux->p_sys;
1009     int i;
1010
1011     p_sys->p_title = vlc_input_title_New();
1012     for( i = 0; i < p_chpl->data.p_chpl->i_chapter; i++ )
1013     {
1014         seekpoint_t *s = vlc_seekpoint_New();
1015
1016         s->psz_name = strdup( p_chpl->data.p_chpl->chapter[i].psz_name );
1017         EnsureUTF8( s->psz_name );
1018         s->i_time_offset = p_chpl->data.p_chpl->chapter[i].i_start / 10;
1019         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
1020     }
1021 }
1022 static void LoadChapterApple( demux_t  *p_demux, mp4_track_t *tk )
1023 {
1024     demux_sys_t *p_sys = p_demux->p_sys;
1025
1026     for( tk->i_sample = 0; tk->i_sample < tk->i_sample_count; tk->i_sample++ )
1027     {
1028         const int64_t i_dts = MP4_TrackGetDTS( p_demux, tk );
1029         const int64_t i_pts_delta = MP4_TrackGetPTSDelta( tk );
1030         const unsigned int i_size = MP4_TrackSampleSize( tk );
1031
1032         if( i_size > 0 && !stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
1033         {
1034             char p_buffer[256];
1035             const int i_read = stream_Read( p_demux->s, p_buffer, __MIN( sizeof(p_buffer), i_size ) );
1036             const int i_len = __MIN( GetWBE(p_buffer), i_read-2 );
1037
1038             if( i_len > 0 )
1039             {
1040                 seekpoint_t *s = vlc_seekpoint_New();
1041
1042                 s->psz_name = strndup( &p_buffer[2], i_len );
1043                 EnsureUTF8( s->psz_name );
1044
1045                 s->i_time_offset = i_dts + __MAX( i_pts_delta, 0 );
1046
1047                 if( !p_sys->p_title )
1048                     p_sys->p_title = vlc_input_title_New();
1049                 TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
1050             }
1051         }
1052         if( tk->i_sample+1 >= tk->chunk[tk->i_chunk].i_sample_first +
1053                               tk->chunk[tk->i_chunk].i_sample_count )
1054             tk->i_chunk++;
1055     }
1056 }
1057 static void LoadChapter( demux_t  *p_demux )
1058 {
1059     demux_sys_t *p_sys = p_demux->p_sys;
1060     MP4_Box_t *p_chpl;
1061
1062     if( ( p_chpl = MP4_BoxGet( p_sys->p_root, "/moov/udta/chpl" ) ) && p_chpl->data.p_chpl->i_chapter > 0 )
1063     {
1064         LoadChapterGpac( p_demux, p_chpl );
1065     }
1066     else if( p_sys->p_tref_chap )
1067     {
1068         MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
1069         unsigned int i, j;
1070
1071         /* Load the first subtitle track like quicktime */
1072         for( i = 0; i < p_chap->i_entry_count; i++ )
1073         {
1074             for( j = 0; j < p_sys->i_tracks; j++ )
1075             {
1076                 mp4_track_t *tk = &p_sys->track[j];
1077                 if( tk->b_ok && tk->i_track_ID == p_chap->i_track_ID[i] &&
1078                     tk->fmt.i_cat == SPU_ES && tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) )
1079                     break;
1080             }
1081             if( j < p_sys->i_tracks )
1082             {
1083                 LoadChapterApple( p_demux, &p_sys->track[j] );
1084                 break;
1085             }
1086         }
1087     }
1088 }
1089
1090 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
1091 static int TrackCreateChunksIndex( demux_t *p_demux,
1092                                    mp4_track_t *p_demux_track )
1093 {
1094     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
1095     MP4_Box_t *p_stsc;
1096
1097     unsigned int i_chunk;
1098     unsigned int i_index, i_last;
1099
1100     if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
1101           !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )||
1102         ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
1103     {
1104         return( VLC_EGENERIC );
1105     }
1106
1107     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
1108     if( !p_demux_track->i_chunk_count )
1109     {
1110         msg_Warn( p_demux, "no chunk defined" );
1111         return( VLC_EGENERIC );
1112     }
1113     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
1114                                    sizeof( mp4_chunk_t ) );
1115     if( p_demux_track->chunk == NULL )
1116     {
1117         return VLC_ENOMEM;
1118     }
1119
1120     /* first we read chunk offset */
1121     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1122     {
1123         mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1124
1125         ck->i_offset = p_co64->data.p_co64->i_chunk_offset[i_chunk];
1126
1127         ck->i_first_dts = 0;
1128         ck->p_sample_count_dts = NULL;
1129         ck->p_sample_delta_dts = NULL;
1130         ck->p_sample_count_pts = NULL;
1131         ck->p_sample_offset_pts = NULL;
1132     }
1133
1134     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
1135         to be used for the sample XXX begin to 1
1136         We construct it begining at the end */
1137     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
1138     i_index = p_stsc->data.p_stsc->i_entry_count;
1139     if( !i_index )
1140     {
1141         msg_Warn( p_demux, "cannot read chunk table or table empty" );
1142         return( VLC_EGENERIC );
1143     }
1144
1145     while( i_index-- )
1146     {
1147         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
1148              i_chunk < i_last; i_chunk++ )
1149         {
1150             if( i_chunk >= p_demux_track->i_chunk_count )
1151             {
1152                 msg_Warn( p_demux, "corrupted chunk table" );
1153                 return VLC_EGENERIC;
1154             }
1155
1156             p_demux_track->chunk[i_chunk].i_sample_description_index =
1157                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
1158             p_demux_track->chunk[i_chunk].i_sample_count =
1159                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
1160         }
1161         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
1162     }
1163
1164     p_demux_track->chunk[0].i_sample_first = 0;
1165     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1166     {
1167         p_demux_track->chunk[i_chunk].i_sample_first =
1168             p_demux_track->chunk[i_chunk-1].i_sample_first +
1169                 p_demux_track->chunk[i_chunk-1].i_sample_count;
1170     }
1171
1172     msg_Dbg( p_demux, "track[Id 0x%x] read %d chunk",
1173              p_demux_track->i_track_ID, p_demux_track->i_chunk_count );
1174
1175     return VLC_SUCCESS;
1176 }
1177
1178 static int TrackCreateSamplesIndex( demux_t *p_demux,
1179                                     mp4_track_t *p_demux_track )
1180 {
1181     MP4_Box_t *p_box;
1182     MP4_Box_data_stsz_t *stsz;
1183     MP4_Box_data_stts_t *stts;
1184     /* TODO use also stss and stsh table for seeking */
1185     /* FIXME use edit table */
1186     int64_t i_sample;
1187     int64_t i_chunk;
1188
1189     int64_t i_index;
1190     int64_t i_index_sample_used;
1191
1192     int64_t i_last_dts;
1193
1194     /* Find stsz
1195      *  Gives the sample size for each samples. There is also a stz2 table
1196      *  (compressed form) that we need to implement TODO */
1197     p_box = MP4_BoxGet( p_demux_track->p_stbl, "stsz" );
1198     if( !p_box )
1199     {
1200         /* FIXME and stz2 */
1201         msg_Warn( p_demux, "cannot find STSZ box" );
1202         return VLC_EGENERIC;
1203     }
1204     stsz = p_box->data.p_stsz;
1205
1206     /* Find stts
1207      *  Gives mapping between sample and decoding time
1208      */
1209     p_box = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
1210     if( !p_box )
1211     {
1212         msg_Warn( p_demux, "cannot find STTS box" );
1213         return VLC_EGENERIC;
1214     }
1215     stts = p_box->data.p_stts;
1216
1217     /* Use stsz table to create a sample number -> sample size table */
1218     p_demux_track->i_sample_count = stsz->i_sample_count;
1219     if( stsz->i_sample_size )
1220     {
1221         /* 1: all sample have the same size, so no need to construct a table */
1222         p_demux_track->i_sample_size = stsz->i_sample_size;
1223         p_demux_track->p_sample_size = NULL;
1224     }
1225     else
1226     {
1227         /* 2: each sample can have a different size */
1228         p_demux_track->i_sample_size = 0;
1229         p_demux_track->p_sample_size =
1230             calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
1231         if( p_demux_track->p_sample_size == NULL )
1232             return VLC_ENOMEM;
1233
1234         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
1235         {
1236             p_demux_track->p_sample_size[i_sample] =
1237                     stsz->i_entry_size[i_sample];
1238         }
1239     }
1240
1241     /* Use stts table to create a sample number -> dts table.
1242      * XXX: if we don't want to waste too much memory, we can't expand
1243      *  the box! so each chunk will contain an "extract" of this table
1244      *  for fast research (problem with raw stream where a sample is sometime
1245      *  just channels*bits_per_sample/8 */
1246
1247     i_last_dts = 0;
1248     i_index = 0; i_index_sample_used = 0;
1249     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1250     {
1251         mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1252         int64_t i_entry, i_sample_count, i;
1253
1254         /* save last dts */
1255         ck->i_first_dts = i_last_dts;
1256
1257         /* count how many entries are needed for this chunk
1258          * for p_sample_delta_dts and p_sample_count_dts */
1259         i_sample_count = ck->i_sample_count;
1260
1261         i_entry = 0;
1262         while( i_sample_count > 0 )
1263         {
1264             i_sample_count -= stts->i_sample_count[i_index+i_entry];
1265             /* don't count already used sample in this entry */
1266             if( i_entry == 0 )
1267                 i_sample_count += i_index_sample_used;
1268
1269             i_entry++;
1270         }
1271
1272         /* allocate them */
1273         ck->p_sample_count_dts = calloc( i_entry, sizeof( uint32_t ) );
1274         ck->p_sample_delta_dts = calloc( i_entry, sizeof( uint32_t ) );
1275
1276         if( !ck->p_sample_count_dts || !ck->p_sample_delta_dts )
1277             return VLC_ENOMEM;
1278
1279         /* now copy */
1280         i_sample_count = ck->i_sample_count;
1281         for( i = 0; i < i_entry; i++ )
1282         {
1283             int64_t i_used;
1284             int64_t i_rest;
1285
1286             i_rest = stts->i_sample_count[i_index] - i_index_sample_used;
1287
1288             i_used = __MIN( i_rest, i_sample_count );
1289
1290             i_index_sample_used += i_used;
1291             i_sample_count -= i_used;
1292
1293             ck->p_sample_count_dts[i] = i_used;
1294             ck->p_sample_delta_dts[i] = stts->i_sample_delta[i_index];
1295
1296             i_last_dts += i_used * ck->p_sample_delta_dts[i];
1297
1298             if( i_index_sample_used >= stts->i_sample_count[i_index] )
1299             {
1300                 i_index++;
1301                 i_index_sample_used = 0;
1302             }
1303         }
1304     }
1305
1306     /* Find ctts
1307      *  Gives the delta between decoding time (dts) and composition table (pts)
1308      */
1309     p_box = MP4_BoxGet( p_demux_track->p_stbl, "ctts" );
1310     if( p_box )
1311     {
1312         MP4_Box_data_ctts_t *ctts = p_box->data.p_ctts;
1313
1314         msg_Warn( p_demux, "CTTS table" );
1315
1316         /* Create pts-dts table per chunk */
1317         i_index = 0; i_index_sample_used = 0;
1318         for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1319         {
1320             mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1321             int64_t i_entry, i_sample_count, i;
1322
1323             /* count how many entries are needed for this chunk
1324              * for p_sample_delta_dts and p_sample_count_dts */
1325             i_sample_count = ck->i_sample_count;
1326
1327             i_entry = 0;
1328             while( i_sample_count > 0 )
1329             {
1330                 i_sample_count -= ctts->i_sample_count[i_index+i_entry];
1331
1332                 /* don't count already used sample in this entry */
1333                 if( i_entry == 0 )
1334                     i_sample_count += i_index_sample_used;
1335
1336                 i_entry++;
1337             }
1338
1339             /* allocate them */
1340             ck->p_sample_count_pts = calloc( i_entry, sizeof( uint32_t ) );
1341             ck->p_sample_offset_pts = calloc( i_entry, sizeof( int32_t ) );
1342             if( !ck->p_sample_count_pts || !ck->p_sample_offset_pts )
1343                 return VLC_ENOMEM;
1344
1345             /* now copy */
1346             i_sample_count = ck->i_sample_count;
1347             for( i = 0; i < i_entry; i++ )
1348             {
1349                 int64_t i_used;
1350                 int64_t i_rest;
1351
1352                 i_rest = ctts->i_sample_count[i_index] -
1353                     i_index_sample_used;
1354
1355                 i_used = __MIN( i_rest, i_sample_count );
1356
1357                 i_index_sample_used += i_used;
1358                 i_sample_count -= i_used;
1359
1360                 ck->p_sample_count_pts[i] = i_used;
1361                 ck->p_sample_offset_pts[i] = ctts->i_sample_offset[i_index];
1362
1363                 if( i_index_sample_used >= ctts->i_sample_count[i_index] )
1364                 {
1365                     i_index++;
1366                     i_index_sample_used = 0;
1367                 }
1368             }
1369         }
1370     }
1371
1372     msg_Dbg( p_demux, "track[Id 0x%x] read %d samples length:%"PRId64"s",
1373              p_demux_track->i_track_ID, p_demux_track->i_sample_count,
1374              i_last_dts / p_demux_track->i_timescale );
1375
1376     return VLC_SUCCESS;
1377 }
1378
1379 /*
1380  * TrackCreateES:
1381  * Create ES and PES to init decoder if needed, for a track starting at i_chunk
1382  */
1383 static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
1384                           unsigned int i_chunk, es_out_id_t **pp_es )
1385 {
1386     MP4_Box_t   *p_sample;
1387     MP4_Box_t   *p_esds;
1388     MP4_Box_t   *p_box;
1389
1390     if( pp_es )
1391         *pp_es = NULL;
1392
1393     if( !p_track->chunk[i_chunk].i_sample_description_index )
1394     {
1395         msg_Warn( p_demux, "invalid SampleEntry index (track[Id 0x%x])",
1396                   p_track->i_track_ID );
1397         return VLC_EGENERIC;
1398     }
1399
1400     p_sample = MP4_BoxGet(  p_track->p_stsd, "[%d]",
1401                 p_track->chunk[i_chunk].i_sample_description_index - 1 );
1402
1403     if( !p_sample ||
1404         ( !p_sample->data.p_data && p_track->fmt.i_cat != SPU_ES ) )
1405     {
1406         msg_Warn( p_demux, "cannot find SampleEntry (track[Id 0x%x])",
1407                   p_track->i_track_ID );
1408         return VLC_EGENERIC;
1409     }
1410
1411     p_track->p_sample = p_sample;
1412
1413     if( p_track->fmt.i_cat == AUDIO_ES && ( p_track->i_sample_size == 1 || p_track->i_sample_size == 2 ) )
1414     {
1415         MP4_Box_data_sample_soun_t *p_soun;
1416
1417         p_soun = p_sample->data.p_sample_soun;
1418
1419         if( p_soun->i_qt_version == 0 )
1420         {
1421             switch( p_sample->i_type )
1422             {
1423                 case VLC_FOURCC( 'i', 'm', 'a', '4' ):
1424                     p_soun->i_qt_version = 1;
1425                     p_soun->i_sample_per_packet = 64;
1426                     p_soun->i_bytes_per_packet  = 34;
1427                     p_soun->i_bytes_per_frame   = 34 * p_soun->i_channelcount;
1428                     p_soun->i_bytes_per_sample  = 2;
1429                     break;
1430                 case VLC_FOURCC( 'M', 'A', 'C', '3' ):
1431                     p_soun->i_qt_version = 1;
1432                     p_soun->i_sample_per_packet = 6;
1433                     p_soun->i_bytes_per_packet  = 2;
1434                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1435                     p_soun->i_bytes_per_sample  = 2;
1436                     break;
1437                 case VLC_FOURCC( 'M', 'A', 'C', '6' ):
1438                     p_soun->i_qt_version = 1;
1439                     p_soun->i_sample_per_packet = 12;
1440                     p_soun->i_bytes_per_packet  = 2;
1441                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1442                     p_soun->i_bytes_per_sample  = 2;
1443                     break;
1444                 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
1445                 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
1446                     p_soun->i_samplesize = 8;
1447                     break;
1448                 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
1449                 case VLC_FOURCC( 'r', 'a', 'w', ' ' ):
1450                 case VLC_FOURCC( 't', 'w', 'o', 's' ):
1451                 case VLC_FOURCC( 's', 'o', 'w', 't' ):
1452                     /* What would be the fun if you could trust the .mov */
1453                     p_track->i_sample_size = ((p_soun->i_samplesize+7)/8) * p_soun->i_channelcount;
1454                     break;
1455                 default:
1456                     break;
1457             }
1458
1459         }
1460         else if( p_soun->i_qt_version == 1 && p_soun->i_sample_per_packet <= 0 )
1461         {
1462             p_soun->i_qt_version = 0;
1463         }
1464     }
1465
1466     /* It's a little ugly but .. there are special cases */
1467     switch( p_sample->i_type )
1468     {
1469         case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
1470         case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
1471         {
1472             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1473             p_track->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
1474             if( p_track->i_sample_size > 1 )
1475                 p_soun->i_qt_version = 0;
1476             break;
1477         }
1478
1479         case( VLC_FOURCC( 'r', 'a', 'w', ' ' ) ):
1480         case( VLC_FOURCC( 'N', 'O', 'N', 'E' ) ):
1481         {
1482             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1483
1484             if(p_soun && (p_soun->i_samplesize+7)/8 == 1 )
1485                 p_track->fmt.i_codec = VLC_FOURCC( 'u', '8', ' ', ' ' );
1486             else
1487                 p_track->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
1488
1489             /* Buggy files workaround */
1490             if( p_sample->data.p_sample_soun && (p_track->i_timescale !=
1491                 p_sample->data.p_sample_soun->i_sampleratehi) )
1492             {
1493                 MP4_Box_data_sample_soun_t *p_soun =
1494                     p_sample->data.p_sample_soun;
1495
1496                 msg_Warn( p_demux, "i_timescale (%"PRIu64") != i_sampleratehi "
1497                           "(%u), making both equal (report any problem).",
1498                           p_track->i_timescale, p_soun->i_sampleratehi );
1499
1500                 if( p_soun->i_sampleratehi )
1501                     p_track->i_timescale = p_soun->i_sampleratehi;
1502                 else
1503                     p_soun->i_sampleratehi = p_track->i_timescale;
1504             }
1505             break;
1506         }
1507
1508         case( VLC_FOURCC( 's', '2', '6', '3' ) ):
1509             p_track->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '3' );
1510             break;
1511
1512         case( VLC_FOURCC( 't', 'e', 'x', 't' ) ):
1513         case( VLC_FOURCC( 't', 'x', '3', 'g' ) ):
1514             p_track->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
1515             /* FIXME: Not true, could be UTF-16 with a Byte Order Mark (0xfeff) */
1516             /* FIXME UTF-8 doesn't work here ? */
1517             if( p_track->b_mac_encoding )
1518                 p_track->fmt.subs.psz_encoding = strdup( "MAC" );
1519             else
1520                 p_track->fmt.subs.psz_encoding = strdup( "UTF-8" );
1521             break;
1522
1523         case VLC_FOURCC('y','v','1','2'):
1524             p_track->fmt.i_codec = VLC_FOURCC('Y','V','1','2');
1525             break;
1526         case VLC_FOURCC('y','u','v','2'):
1527             p_track->fmt.i_codec = VLC_FOURCC('Y','U','Y','2');
1528             break;
1529
1530         case VLC_FOURCC('i','n','2','4'):
1531             /* in in24/in32 there's enda-atom to tell it's little-endian (if present) */
1532             if( ( MP4_BoxGet( p_sample, "wave/enda" ) ) ||
1533                 ( MP4_BoxGet( p_sample, "enda" ) ) )
1534             {
1535                 p_track->fmt.i_codec = VLC_FOURCC('4','2','n','i');
1536             } else {
1537                 p_track->fmt.i_codec = p_sample->i_type;
1538             }
1539             break;
1540
1541         default:
1542             p_track->fmt.i_codec = p_sample->i_type;
1543             break;
1544     }
1545
1546     /* now see if esds is present and if so create a data packet
1547         with decoder_specific_info  */
1548 #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
1549     if( ( ( p_esds = MP4_BoxGet( p_sample, "esds" ) ) ||
1550           ( p_esds = MP4_BoxGet( p_sample, "wave/esds" ) ) )&&
1551         ( p_esds->data.p_esds )&&
1552         ( p_decconfig ) )
1553     {
1554         /* First update information based on i_objectTypeIndication */
1555         switch( p_decconfig->i_objectTypeIndication )
1556         {
1557             case( 0x20 ): /* MPEG4 VIDEO */
1558                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','v' );
1559                 break;
1560             case( 0x40):
1561                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1562                 break;
1563             case( 0x60):
1564             case( 0x61):
1565             case( 0x62):
1566             case( 0x63):
1567             case( 0x64):
1568             case( 0x65): /* MPEG2 video */
1569                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1570                 break;
1571             /* Theses are MPEG2-AAC */
1572             case( 0x66): /* main profile */
1573             case( 0x67): /* Low complexity profile */
1574             case( 0x68): /* Scaleable Sampling rate profile */
1575                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1576                 break;
1577             /* true MPEG 2 audio */
1578             case( 0x69):
1579                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1580                 break;
1581             case( 0x6a): /* MPEG1 video */
1582                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1583                 break;
1584             case( 0x6b): /* MPEG1 audio */
1585                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1586                 break;
1587             case( 0x6c ): /* jpeg */
1588                 p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' );
1589                 break;
1590             case( 0x6d ): /* png */
1591                 p_track->fmt.i_codec = VLC_FOURCC( 'p','n','g',' ' );
1592                 break;
1593             case( 0x6e ): /* jpeg200 */
1594                 p_track->fmt.i_codec = VLC_FOURCC( 'M','J','2','C' );
1595                 break;
1596             case( 0xa3 ): /* vc1 */
1597                 p_track->fmt.i_codec = VLC_FOURCC( 'W','V','C','1' );
1598                 break;
1599
1600             /* Private ID */
1601             case( 0xe0 ): /* NeroDigital: dvd subs */
1602                 if( p_track->fmt.i_cat == SPU_ES )
1603                 {
1604                     p_track->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
1605                     if( p_track->i_width > 0 )
1606                         p_track->fmt.subs.spu.i_original_frame_width = p_track->i_width;
1607                     if( p_track->i_height > 0 )
1608                         p_track->fmt.subs.spu.i_original_frame_height = p_track->i_height;
1609                     break;
1610                 }
1611             case( 0xe1 ): /* QCelp for 3gp */
1612                 if( p_track->fmt.i_cat == AUDIO_ES )
1613                 {
1614                     p_track->fmt.i_codec = VLC_FOURCC( 'Q','c','l','p' );
1615                 }
1616                 break;
1617
1618             /* Fallback */
1619             default:
1620                 /* Unknown entry, but don't touch i_fourcc */
1621                 msg_Warn( p_demux,
1622                           "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])",
1623                           p_decconfig->i_objectTypeIndication,
1624                           p_track->i_track_ID );
1625                 break;
1626         }
1627         p_track->fmt.i_extra = p_decconfig->i_decoder_specific_info_len;
1628         if( p_track->fmt.i_extra > 0 )
1629         {
1630             p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1631             memcpy( p_track->fmt.p_extra, p_decconfig->p_decoder_specific_info,
1632                     p_track->fmt.i_extra );
1633         }
1634     }
1635     else
1636     {
1637         switch( p_sample->i_type )
1638         {
1639             /* qt decoder, send the complete chunk */
1640             case VLC_FOURCC ('h', 'd', 'v', '1'): // HDV 720p30
1641             case VLC_FOURCC ('h', 'd', 'v', '2'): // HDV 1080i60
1642             case VLC_FOURCC ('h', 'd', 'v', '3'): // HDV 1080i50
1643             case VLC_FOURCC ('h', 'd', 'v', '5'): // HDV 720p25
1644             case VLC_FOURCC ('m', 'x', '5', 'n'): // MPEG2 IMX NTSC 525/60 50mb/s produced by FCP
1645             case VLC_FOURCC ('m', 'x', '5', 'p'): // MPEG2 IMX PAL 625/60 50mb/s produced by FCP
1646             case VLC_FOURCC ('m', 'x', '4', 'n'): // MPEG2 IMX NTSC 525/60 40mb/s produced by FCP
1647             case VLC_FOURCC ('m', 'x', '4', 'p'): // MPEG2 IMX PAL 625/60 40mb/s produced by FCP
1648             case VLC_FOURCC ('m', 'x', '3', 'n'): // MPEG2 IMX NTSC 525/60 30mb/s produced by FCP
1649             case VLC_FOURCC ('m', 'x', '3', 'p'): // MPEG2 IMX PAL 625/50 30mb/s produced by FCP
1650             case VLC_FOURCC ('x', 'd', 'v', '2'): // XDCAM HD 1080i60
1651             case VLC_FOURCC ('A', 'V', 'm', 'p'): // AVID IMX PAL
1652                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1653                 break;
1654             /* qt decoder, send the complete chunk */
1655             case VLC_FOURCC( 'S', 'V', 'Q', '3' ):
1656             case VLC_FOURCC( 'S', 'V', 'Q', '1' ):
1657             case VLC_FOURCC( 'V', 'P', '3', '1' ):
1658             case VLC_FOURCC( '3', 'I', 'V', '1' ):
1659             case VLC_FOURCC( 'Z', 'y', 'G', 'o' ):
1660                 p_track->fmt.i_extra =
1661                     p_sample->data.p_sample_vide->i_qt_image_description;
1662                 if( p_track->fmt.i_extra > 0 )
1663                 {
1664                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1665                     memcpy( p_track->fmt.p_extra,
1666                             p_sample->data.p_sample_vide->p_qt_image_description,
1667                             p_track->fmt.i_extra);
1668                 }
1669                 break;
1670             case VLC_FOURCC( 'Q', 'D', 'M', 'C' ):
1671             case VLC_FOURCC( 'Q', 'D', 'M', '2' ):
1672             case VLC_FOURCC( 'Q', 'c', 'l', 'p' ):
1673             case VLC_FOURCC( 's', 'a', 'm', 'r' ):
1674             case VLC_FOURCC( 'a', 'l', 'a', 'c' ):
1675                 p_track->fmt.i_extra =
1676                     p_sample->data.p_sample_soun->i_qt_description;
1677                 if( p_track->fmt.i_extra > 0 )
1678                 {
1679                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1680                     memcpy( p_track->fmt.p_extra,
1681                             p_sample->data.p_sample_soun->p_qt_description,
1682                             p_track->fmt.i_extra);
1683                 }
1684                 break;
1685
1686             /* avc1: send avcC (h264 without annexe B, ie without start code)*/
1687             case VLC_FOURCC( 'a', 'v', 'c', '1' ):
1688             {
1689                 MP4_Box_t *p_avcC = MP4_BoxGet( p_sample, "avcC" );
1690
1691                 if( p_avcC )
1692                 {
1693                     p_track->fmt.i_extra = p_avcC->data.p_avcC->i_avcC;
1694                     if( p_track->fmt.i_extra > 0 )
1695                     {
1696                         p_track->fmt.p_extra = malloc( p_avcC->data.p_avcC->i_avcC );
1697                         memcpy( p_track->fmt.p_extra, p_avcC->data.p_avcC->p_avcC,
1698                                 p_track->fmt.i_extra );
1699                     }
1700                 }
1701                 else
1702                 {
1703                     msg_Err( p_demux, "missing avcC" );
1704                 }
1705                 break;
1706             }
1707
1708             case VLC_FOURCC('m','s',0x00,0x02):
1709             case VLC_FOURCC('m','s',0x00,0x11):
1710                 p_track->fmt.audio.i_blockalign = p_sample->data.p_sample_soun->i_bytes_per_frame;
1711                 break;
1712
1713             default:
1714                 break;
1715         }
1716     }
1717
1718 #undef p_decconfig
1719
1720     /* some last initialisation */
1721     switch( p_track->fmt.i_cat )
1722     {
1723     case VIDEO_ES:
1724         p_track->fmt.video.i_width = p_sample->data.p_sample_vide->i_width;
1725         p_track->fmt.video.i_height = p_sample->data.p_sample_vide->i_height;
1726         p_track->fmt.video.i_bits_per_pixel =
1727             p_sample->data.p_sample_vide->i_depth;
1728
1729         /* fall on display size */
1730         if( p_track->fmt.video.i_width <= 0 )
1731             p_track->fmt.video.i_width = p_track->i_width;
1732         if( p_track->fmt.video.i_height <= 0 )
1733             p_track->fmt.video.i_height = p_track->i_height;
1734
1735         /* Find out apect ratio from display size */
1736         if( p_track->i_width > 0 && p_track->i_height > 0 &&
1737             /* Work-around buggy muxed files */
1738             p_sample->data.p_sample_vide->i_width != p_track->i_width )
1739             p_track->fmt.video.i_aspect =
1740                 VOUT_ASPECT_FACTOR * p_track->i_width / p_track->i_height;
1741
1742         /* Support for cropping (eg. in H263 files) */
1743         p_track->fmt.video.i_visible_width = p_track->fmt.video.i_width;
1744         p_track->fmt.video.i_visible_height = p_track->fmt.video.i_height;
1745
1746         /* Frame rate */
1747         p_track->fmt.video.i_frame_rate = p_track->i_timescale;
1748         p_track->fmt.video.i_frame_rate_base = 1;
1749
1750         if( p_track->fmt.video.i_frame_rate &&
1751             (p_box = MP4_BoxGet( p_track->p_stbl, "stts" )) &&
1752             p_box->data.p_stts->i_entry_count >= 1 )
1753         {
1754             p_track->fmt.video.i_frame_rate_base =
1755                 p_box->data.p_stts->i_sample_delta[0];
1756         }
1757
1758         break;
1759
1760     case AUDIO_ES:
1761         p_track->fmt.audio.i_channels =
1762             p_sample->data.p_sample_soun->i_channelcount;
1763         p_track->fmt.audio.i_rate =
1764             p_sample->data.p_sample_soun->i_sampleratehi;
1765         p_track->fmt.i_bitrate = p_sample->data.p_sample_soun->i_channelcount *
1766             p_sample->data.p_sample_soun->i_sampleratehi *
1767                 p_sample->data.p_sample_soun->i_samplesize;
1768         p_track->fmt.audio.i_bitspersample =
1769             p_sample->data.p_sample_soun->i_samplesize;
1770
1771         if( p_track->i_sample_size != 0 &&
1772             p_sample->data.p_sample_soun->i_qt_version == 1 && p_sample->data.p_sample_soun->i_sample_per_packet <= 0 )
1773         {
1774             msg_Err( p_demux, "Invalid sample per packet value for qt_version 1" );
1775             return VLC_EGENERIC;
1776         }
1777         break;
1778
1779     default:
1780         break;
1781     }
1782
1783     if( pp_es )
1784         *pp_es = es_out_Add( p_demux->out, &p_track->fmt );
1785
1786     return VLC_SUCCESS;
1787 }
1788
1789 /* given a time it return sample/chunk
1790  * it also update elst field of the track
1791  */
1792 static int TrackTimeToSampleChunk( demux_t *p_demux, mp4_track_t *p_track,
1793                                    int64_t i_start, uint32_t *pi_chunk,
1794                                    uint32_t *pi_sample )
1795 {
1796     demux_sys_t *p_sys = p_demux->p_sys;
1797     MP4_Box_t   *p_stss;
1798     uint64_t     i_dts;
1799     unsigned int i_sample;
1800     unsigned int i_chunk;
1801     int          i_index;
1802
1803     /* FIXME see if it's needed to check p_track->i_chunk_count */
1804     if( p_track->i_chunk_count == 0 )
1805         return( VLC_EGENERIC );
1806
1807     /* handle elst (find the correct one) */
1808     MP4_TrackSetELST( p_demux, p_track, i_start );
1809     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1810     {
1811         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1812         int64_t i_mvt= i_start * p_sys->i_timescale / (int64_t)1000000;
1813
1814         /* now calculate i_start for this elst */
1815         /* offset */
1816         i_start -= p_track->i_elst_time * INT64_C(1000000) / p_sys->i_timescale;
1817         if( i_start < 0 )
1818         {
1819             *pi_chunk = 0;
1820             *pi_sample= 0;
1821
1822             return VLC_SUCCESS;
1823         }
1824         /* to track time scale */
1825         i_start  = i_start * p_track->i_timescale / (int64_t)1000000;
1826         /* add elst offset */
1827         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
1828              elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
1829             elst->i_media_time[p_track->i_elst] > 0 )
1830         {
1831             i_start += elst->i_media_time[p_track->i_elst];
1832         }
1833
1834         msg_Dbg( p_demux, "elst (%d) gives %"PRId64"ms (movie)-> %"PRId64
1835                  "ms (track)", p_track->i_elst,
1836                  i_mvt * 1000 / p_sys->i_timescale,
1837                  i_start * 1000 / p_track->i_timescale );
1838     }
1839     else
1840     {
1841         /* convert absolute time to in timescale unit */
1842         i_start = i_start * p_track->i_timescale / (int64_t)1000000;
1843     }
1844
1845     /* we start from sample 0/chunk 0, hope it won't take too much time */
1846     /* *** find good chunk *** */
1847     for( i_chunk = 0; ; i_chunk++ )
1848     {
1849         if( i_chunk + 1 >= p_track->i_chunk_count )
1850         {
1851             /* at the end and can't check if i_start in this chunk,
1852                it will be check while searching i_sample */
1853             i_chunk = p_track->i_chunk_count - 1;
1854             break;
1855         }
1856
1857         if( (uint64_t)i_start >= p_track->chunk[i_chunk].i_first_dts &&
1858             (uint64_t)i_start <  p_track->chunk[i_chunk + 1].i_first_dts )
1859         {
1860             break;
1861         }
1862     }
1863
1864     /* *** find sample in the chunk *** */
1865     i_sample = p_track->chunk[i_chunk].i_sample_first;
1866     i_dts    = p_track->chunk[i_chunk].i_first_dts;
1867     for( i_index = 0; i_sample < p_track->chunk[i_chunk].i_sample_count; )
1868     {
1869         if( i_dts +
1870             p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1871             p_track->chunk[i_chunk].p_sample_delta_dts[i_index] < (uint64_t)i_start )
1872         {
1873             i_dts    +=
1874                 p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1875                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1876
1877             i_sample += p_track->chunk[i_chunk].p_sample_count_dts[i_index];
1878             i_index++;
1879         }
1880         else
1881         {
1882             if( p_track->chunk[i_chunk].p_sample_delta_dts[i_index] <= 0 )
1883             {
1884                 break;
1885             }
1886             i_sample += ( i_start - i_dts ) /
1887                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1888             break;
1889         }
1890     }
1891
1892     if( i_sample >= p_track->i_sample_count )
1893     {
1894         msg_Warn( p_demux, "track[Id 0x%x] will be disabled "
1895                   "(seeking too far) chunk=%d sample=%d",
1896                   p_track->i_track_ID, i_chunk, i_sample );
1897         return( VLC_EGENERIC );
1898     }
1899
1900
1901     /* *** Try to find nearest sync points *** */
1902     if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
1903     {
1904         unsigned int i_index;
1905         msg_Dbg( p_demux,
1906                     "track[Id 0x%x] using Sync Sample Box (stss)",
1907                     p_track->i_track_ID );
1908         for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
1909         {
1910             if( p_stss->data.p_stss->i_sample_number[i_index] >= i_sample )
1911             {
1912                 if( i_index > 0 )
1913                 {
1914                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1915                             i_sample,
1916                             p_stss->data.p_stss->i_sample_number[i_index-1] );
1917                     i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
1918                     /* new i_sample is less than old so i_chunk can only decreased */
1919                     while( i_chunk > 0 &&
1920                             i_sample < p_track->chunk[i_chunk].i_sample_first )
1921                     {
1922                         i_chunk--;
1923                     }
1924                 }
1925                 else
1926                 {
1927                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1928                             i_sample,
1929                             p_stss->data.p_stss->i_sample_number[i_index] );
1930                     i_sample = p_stss->data.p_stss->i_sample_number[i_index];
1931                     /* new i_sample is more than old so i_chunk can only increased */
1932                     while( i_chunk < p_track->i_chunk_count - 1 &&
1933                            i_sample >= p_track->chunk[i_chunk].i_sample_first +
1934                              p_track->chunk[i_chunk].i_sample_count )
1935                     {
1936                         i_chunk++;
1937                     }
1938                 }
1939                 break;
1940             }
1941         }
1942     }
1943     else
1944     {
1945         msg_Dbg( p_demux, "track[Id 0x%x] does not provide Sync "
1946                  "Sample Box (stss)", p_track->i_track_ID );
1947     }
1948
1949     *pi_chunk  = i_chunk;
1950     *pi_sample = i_sample;
1951
1952     return VLC_SUCCESS;
1953 }
1954
1955 static int TrackGotoChunkSample( demux_t *p_demux, mp4_track_t *p_track,
1956                                  unsigned int i_chunk, unsigned int i_sample )
1957 {
1958     bool b_reselect = false;
1959
1960     /* now see if actual es is ok */
1961     if( (p_track->i_chunk >= p_track->i_chunk_count - 1) ||
1962         (p_track->chunk[p_track->i_chunk].i_sample_description_index !=
1963             p_track->chunk[i_chunk].i_sample_description_index) )
1964     {
1965         msg_Warn( p_demux, "recreate ES for track[Id 0x%x]",
1966                   p_track->i_track_ID );
1967
1968         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
1969                         p_track->p_es, &b_reselect );
1970
1971         es_out_Del( p_demux->out, p_track->p_es );
1972
1973         p_track->p_es = NULL;
1974
1975         if( TrackCreateES( p_demux, p_track, i_chunk, &p_track->p_es ) )
1976         {
1977             msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
1978                      p_track->i_track_ID );
1979
1980             p_track->b_ok       = false;
1981             p_track->b_selected = false;
1982             return VLC_EGENERIC;
1983         }
1984     }
1985
1986     /* select again the new decoder */
1987     if( b_reselect )
1988     {
1989         es_out_Control( p_demux->out, ES_OUT_SET_ES, p_track->p_es );
1990     }
1991
1992     p_track->i_chunk    = i_chunk;
1993     p_track->i_sample   = i_sample;
1994
1995     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
1996 }
1997
1998 /****************************************************************************
1999  * MP4_TrackCreate:
2000  ****************************************************************************
2001  * Parse track information and create all needed data to run a track
2002  * If it succeed b_ok is set to 1 else to 0
2003  ****************************************************************************/
2004 static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
2005                              MP4_Box_t *p_box_trak,
2006                              bool b_force_enable )
2007 {
2008     demux_sys_t *p_sys = p_demux->p_sys;
2009
2010     MP4_Box_t *p_tkhd = MP4_BoxGet( p_box_trak, "tkhd" );
2011     MP4_Box_t *p_tref = MP4_BoxGet( p_box_trak, "tref" );
2012     MP4_Box_t *p_elst;
2013
2014     MP4_Box_t *p_mdhd;
2015     MP4_Box_t *p_udta;
2016     MP4_Box_t *p_hdlr;
2017
2018     MP4_Box_t *p_vmhd;
2019     MP4_Box_t *p_smhd;
2020
2021     MP4_Box_t *p_drms;
2022
2023     unsigned int i;
2024     char language[4];
2025
2026     /* hint track unsupported */
2027
2028     /* set default value (-> track unusable) */
2029     p_track->b_ok       = false;
2030     p_track->b_enable   = false;
2031     p_track->b_selected = false;
2032     p_track->b_chapter  = false;
2033     p_track->b_mac_encoding = false;
2034
2035     es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 );
2036
2037     if( !p_tkhd )
2038     {
2039         return;
2040     }
2041
2042     /* do we launch this track by default ? */
2043     p_track->b_enable =
2044         ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
2045     if( !p_track->b_enable )
2046         p_track->fmt.i_priority = -1;
2047
2048     p_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
2049     p_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
2050     p_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
2051
2052     if( p_tref )
2053     {
2054 /*        msg_Warn( p_demux, "unhandled box: tref --> FIXME" ); */
2055     }
2056
2057     p_mdhd = MP4_BoxGet( p_box_trak, "mdia/mdhd" );
2058     p_hdlr = MP4_BoxGet( p_box_trak, "mdia/hdlr" );
2059
2060     if( ( !p_mdhd )||( !p_hdlr ) )
2061     {
2062         return;
2063     }
2064
2065     p_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
2066     if( !p_track->i_timescale )
2067         return;
2068
2069     if( p_mdhd->data.p_mdhd->i_language_code < 0x800 )
2070     {
2071         /* We can convert i_language_code into iso 639 code,
2072          * I won't */
2073         strcpy( language, MP4_ConvertMacCode( p_mdhd->data.p_mdhd->i_language_code ) );
2074         p_track->b_mac_encoding = true;
2075     }
2076     else
2077     {
2078         for( i = 0; i < 3; i++ )
2079             language[i] = p_mdhd->data.p_mdhd->i_language[i];
2080         language[3] = '\0';
2081     }
2082
2083     switch( p_hdlr->data.p_hdlr->i_handler_type )
2084     {
2085         case( FOURCC_soun ):
2086             if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) )
2087             {
2088                 return;
2089             }
2090             p_track->fmt.i_cat = AUDIO_ES;
2091             break;
2092
2093         case( FOURCC_vide ):
2094             if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) )
2095             {
2096                 return;
2097             }
2098             p_track->fmt.i_cat = VIDEO_ES;
2099             break;
2100
2101         case( FOURCC_text ):
2102         case( FOURCC_subp ):
2103         case( FOURCC_tx3g ):
2104             p_track->fmt.i_cat = SPU_ES;
2105             break;
2106
2107         default:
2108             return;
2109     }
2110
2111     p_track->i_elst = 0;
2112     p_track->i_elst_time = 0;
2113     if( ( p_track->p_elst = p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) )
2114     {
2115         MP4_Box_data_elst_t *elst = p_elst->data.p_elst;
2116         unsigned int i;
2117
2118         msg_Warn( p_demux, "elst box found" );
2119         for( i = 0; i < elst->i_entry_count; i++ )
2120         {
2121             msg_Dbg( p_demux, "   - [%d] duration=%"PRId64"ms media time=%"PRId64
2122                      "ms) rate=%d.%d", i,
2123                      elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
2124                      elst->i_media_time[i] >= 0 ?
2125                      (int64_t)(elst->i_media_time[i] * 1000 / p_track->i_timescale) :
2126                      INT64_C(-1),
2127                      elst->i_media_rate_integer[i],
2128                      elst->i_media_rate_fraction[i] );
2129         }
2130     }
2131
2132
2133 /*  TODO
2134     add support for:
2135     p_dinf = MP4_BoxGet( p_minf, "dinf" );
2136 */
2137     if( !( p_track->p_stbl = MP4_BoxGet( p_box_trak,"mdia/minf/stbl" ) ) ||
2138         !( p_track->p_stsd = MP4_BoxGet( p_box_trak,"mdia/minf/stbl/stsd") ) )
2139     {
2140         return;
2141     }
2142
2143     p_drms = MP4_BoxGet( p_track->p_stsd, "drms" );
2144     p_track->b_drms = p_drms != NULL;
2145     p_track->p_drms = p_track->b_drms ?
2146         p_drms->data.p_sample_soun->p_drms : NULL;
2147
2148     /* Set language */
2149     if( *language && strcmp( language, "```" ) && strcmp( language, "und" ) )
2150     {
2151         p_track->fmt.psz_language = strdup( language );
2152     }
2153
2154     p_udta = MP4_BoxGet( p_box_trak, "udta" );
2155     if( p_udta )
2156     {
2157         MP4_Box_t *p_0xa9xxx;
2158         for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
2159                  p_0xa9xxx = p_0xa9xxx->p_next )
2160         {
2161             switch( p_0xa9xxx->i_type )
2162             {
2163                 case FOURCC_0xa9nam:
2164                     p_track->fmt.psz_description =
2165                         strdup( p_0xa9xxx->data.p_0xa9xxx->psz_text );
2166                     break;
2167             }
2168         }
2169     }
2170
2171     /* Create chunk index table and sample index table */
2172     if( TrackCreateChunksIndex( p_demux,p_track  ) ||
2173         TrackCreateSamplesIndex( p_demux, p_track ) )
2174     {
2175         return; /* cannot create chunks index */
2176     }
2177
2178     p_track->i_chunk  = 0;
2179     p_track->i_sample = 0;
2180
2181     /* Mark chapter only track */
2182     if( p_sys->p_tref_chap )
2183     {
2184         MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
2185         unsigned int i;
2186
2187         for( i = 0; i < p_chap->i_entry_count; i++ )
2188         {
2189             if( p_track->i_track_ID == p_chap->i_track_ID[i] )
2190             {
2191                 p_track->b_chapter = true;
2192                 p_track->b_enable = false;
2193                 break;
2194             }
2195         }
2196     }
2197
2198     /* now create es */
2199     if( b_force_enable &&
2200         ( p_track->fmt.i_cat == VIDEO_ES || p_track->fmt.i_cat == AUDIO_ES ) )
2201     {
2202         msg_Warn( p_demux, "Enabling track[Id 0x%x] (buggy file without enabled track)",
2203                   p_track->i_track_ID );
2204         p_track->b_enable = true;
2205         p_track->fmt.i_priority = 0;
2206     }
2207
2208     p_track->p_es = NULL;
2209     if( TrackCreateES( p_demux,
2210                        p_track, p_track->i_chunk,
2211                        p_track->b_chapter ? NULL : &p_track->p_es ) )
2212     {
2213         msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
2214                  p_track->i_track_ID );
2215         return;
2216     }
2217     p_track->b_ok = true;
2218 #if 0
2219     {
2220         int i;
2221         for( i = 0; i < p_track->i_chunk_count; i++ )
2222         {
2223             fprintf( stderr, "%-5d sample_count=%d pts=%lld\n",
2224                      i, p_track->chunk[i].i_sample_count,
2225                      p_track->chunk[i].i_first_dts );
2226
2227         }
2228     }
2229 #endif
2230 }
2231
2232 /****************************************************************************
2233  * MP4_TrackDestroy:
2234  ****************************************************************************
2235  * Destroy a track created by MP4_TrackCreate.
2236  ****************************************************************************/
2237 static void MP4_TrackDestroy( mp4_track_t *p_track )
2238 {
2239     unsigned int i_chunk;
2240
2241     p_track->b_ok = false;
2242     p_track->b_enable   = false;
2243     p_track->b_selected = false;
2244
2245     es_format_Clean( &p_track->fmt );
2246
2247     for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ )
2248     {
2249         if( p_track->chunk )
2250         {
2251            FREENULL(p_track->chunk[i_chunk].p_sample_count_dts);
2252            FREENULL(p_track->chunk[i_chunk].p_sample_delta_dts );
2253
2254            FREENULL(p_track->chunk[i_chunk].p_sample_count_pts);
2255            FREENULL(p_track->chunk[i_chunk].p_sample_offset_pts );
2256         }
2257     }
2258     FREENULL( p_track->chunk );
2259
2260     if( !p_track->i_sample_size )
2261     {
2262         FREENULL( p_track->p_sample_size );
2263     }
2264 }
2265
2266 static int MP4_TrackSelect( demux_t *p_demux, mp4_track_t *p_track,
2267                             mtime_t i_start )
2268 {
2269     if( !p_track->b_ok || p_track->b_chapter )
2270     {
2271         return VLC_EGENERIC;
2272     }
2273
2274     if( p_track->b_selected )
2275     {
2276         msg_Warn( p_demux, "track[Id 0x%x] already selected",
2277                   p_track->i_track_ID );
2278         return VLC_SUCCESS;
2279     }
2280
2281     return MP4_TrackSeek( p_demux, p_track, i_start );
2282 }
2283
2284 static void MP4_TrackUnselect( demux_t *p_demux, mp4_track_t *p_track )
2285 {
2286     if( !p_track->b_ok || p_track->b_chapter )
2287     {
2288         return;
2289     }
2290
2291     if( !p_track->b_selected )
2292     {
2293         msg_Warn( p_demux, "track[Id 0x%x] already unselected",
2294                   p_track->i_track_ID );
2295         return;
2296     }
2297     if( p_track->p_es )
2298     {
2299         es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE,
2300                         p_track->p_es, false );
2301     }
2302
2303     p_track->b_selected = false;
2304 }
2305
2306 static int MP4_TrackSeek( demux_t *p_demux, mp4_track_t *p_track,
2307                           mtime_t i_start )
2308 {
2309     uint32_t i_chunk;
2310     uint32_t i_sample;
2311
2312     if( !p_track->b_ok || p_track->b_chapter )
2313         return VLC_EGENERIC;
2314
2315     p_track->b_selected = false;
2316
2317     if( TrackTimeToSampleChunk( p_demux, p_track, i_start,
2318                                 &i_chunk, &i_sample ) )
2319     {
2320         msg_Warn( p_demux, "cannot select track[Id 0x%x]",
2321                   p_track->i_track_ID );
2322         return VLC_EGENERIC;
2323     }
2324
2325     p_track->b_selected = true;
2326
2327     if( !TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) )
2328         p_track->b_selected = true;
2329
2330     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
2331 }
2332
2333
2334 /*
2335  * 3 types: for audio
2336  *
2337  */
2338 #define QT_V0_MAX_SAMPLES 1024
2339 static int MP4_TrackSampleSize( mp4_track_t *p_track )
2340 {
2341     int i_size;
2342     MP4_Box_data_sample_soun_t *p_soun;
2343
2344     if( p_track->i_sample_size == 0 )
2345     {
2346         /* most simple case */
2347         return p_track->p_sample_size[p_track->i_sample];
2348     }
2349     if( p_track->fmt.i_cat != AUDIO_ES )
2350     {
2351         return p_track->i_sample_size;
2352     }
2353
2354     p_soun = p_track->p_sample->data.p_sample_soun;
2355
2356     if( p_soun->i_qt_version == 1 )
2357     {
2358         i_size = p_track->chunk[p_track->i_chunk].i_sample_count /
2359             p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
2360     }
2361     else if( p_track->i_sample_size > 256 )
2362     {
2363         /* We do that so we don't read too much data
2364          * (in this case we are likely dealing with compressed data) */
2365         i_size = p_track->i_sample_size;
2366     }
2367     else
2368     {
2369         /* Read a bunch of samples at once */
2370         int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count -
2371             ( p_track->i_sample -
2372               p_track->chunk[p_track->i_chunk].i_sample_first );
2373
2374         i_samples = __MIN( QT_V0_MAX_SAMPLES, i_samples );
2375         i_size = i_samples * p_track->i_sample_size;
2376     }
2377
2378     //fprintf( stderr, "size=%d\n", i_size );
2379     return i_size;
2380 }
2381
2382 static uint64_t MP4_TrackGetPos( mp4_track_t *p_track )
2383 {
2384     unsigned int i_sample;
2385     uint64_t i_pos;
2386
2387     i_pos = p_track->chunk[p_track->i_chunk].i_offset;
2388
2389     if( p_track->i_sample_size )
2390     {
2391         MP4_Box_data_sample_soun_t *p_soun =
2392             p_track->p_sample->data.p_sample_soun;
2393
2394         if( p_soun->i_qt_version == 0 )
2395         {
2396             i_pos += ( p_track->i_sample -
2397                        p_track->chunk[p_track->i_chunk].i_sample_first ) *
2398                      p_track->i_sample_size;
2399         }
2400         else
2401         {
2402             /* we read chunk by chunk */
2403             i_pos += 0;
2404         }
2405     }
2406     else
2407     {
2408         for( i_sample = p_track->chunk[p_track->i_chunk].i_sample_first;
2409              i_sample < p_track->i_sample; i_sample++ )
2410         {
2411             i_pos += p_track->p_sample_size[i_sample];
2412         }
2413     }
2414
2415     return i_pos;
2416 }
2417
2418 static int MP4_TrackNextSample( demux_t *p_demux, mp4_track_t *p_track )
2419 {
2420     if( p_track->fmt.i_cat == AUDIO_ES && p_track->i_sample_size != 0 )
2421     {
2422         MP4_Box_data_sample_soun_t *p_soun;
2423
2424         p_soun = p_track->p_sample->data.p_sample_soun;
2425
2426         if( p_soun->i_qt_version == 1 )
2427         {
2428             /* chunk by chunk */
2429             p_track->i_sample =
2430                 p_track->chunk[p_track->i_chunk].i_sample_first +
2431                 p_track->chunk[p_track->i_chunk].i_sample_count;
2432         }
2433         else if( p_track->i_sample_size > 256 )
2434         {
2435             /* We do that so we don't read too much data
2436              * (in this case we are likely dealing with compressed data) */
2437             p_track->i_sample += 1;
2438         }
2439         else
2440         {
2441             /* FIXME */
2442             p_track->i_sample += QT_V0_MAX_SAMPLES;
2443             if( p_track->i_sample >
2444                 p_track->chunk[p_track->i_chunk].i_sample_first +
2445                 p_track->chunk[p_track->i_chunk].i_sample_count )
2446             {
2447                 p_track->i_sample =
2448                     p_track->chunk[p_track->i_chunk].i_sample_first +
2449                     p_track->chunk[p_track->i_chunk].i_sample_count;
2450             }
2451         }
2452     }
2453     else
2454     {
2455         p_track->i_sample++;
2456     }
2457
2458     if( p_track->i_sample >= p_track->i_sample_count )
2459         return VLC_EGENERIC;
2460
2461     /* Have we changed chunk ? */
2462     if( p_track->i_sample >=
2463             p_track->chunk[p_track->i_chunk].i_sample_first +
2464             p_track->chunk[p_track->i_chunk].i_sample_count )
2465     {
2466         if( TrackGotoChunkSample( p_demux, p_track, p_track->i_chunk + 1,
2467                                   p_track->i_sample ) )
2468         {
2469             msg_Warn( p_demux, "track[0x%x] will be disabled "
2470                       "(cannot restart decoder)", p_track->i_track_ID );
2471             MP4_TrackUnselect( p_demux, p_track );
2472             return VLC_EGENERIC;
2473         }
2474     }
2475
2476     /* Have we changed elst */
2477     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
2478     {
2479         demux_sys_t *p_sys = p_demux->p_sys;
2480         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
2481         uint64_t i_mvt = MP4_TrackGetDTS( p_demux, p_track ) *
2482                         p_sys->i_timescale / (int64_t)1000000;
2483
2484         if( (unsigned int)p_track->i_elst < elst->i_entry_count &&
2485             i_mvt >= p_track->i_elst_time +
2486                      elst->i_segment_duration[p_track->i_elst] )
2487         {
2488             MP4_TrackSetELST( p_demux, p_track,
2489                               MP4_TrackGetDTS( p_demux, p_track ) );
2490         }
2491     }
2492
2493     return VLC_SUCCESS;
2494 }
2495
2496 static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk,
2497                               int64_t i_time )
2498 {
2499     demux_sys_t *p_sys = p_demux->p_sys;
2500     int         i_elst_last = tk->i_elst;
2501
2502     /* handle elst (find the correct one) */
2503     tk->i_elst      = 0;
2504     tk->i_elst_time = 0;
2505     if( tk->p_elst && tk->p_elst->data.p_elst->i_entry_count > 0 )
2506     {
2507         MP4_Box_data_elst_t *elst = tk->p_elst->data.p_elst;
2508         int64_t i_mvt= i_time * p_sys->i_timescale / (int64_t)1000000;
2509
2510         for( tk->i_elst = 0; (unsigned int)tk->i_elst < elst->i_entry_count; tk->i_elst++ )
2511         {
2512             mtime_t i_dur = elst->i_segment_duration[tk->i_elst];
2513
2514             if( tk->i_elst_time <= i_mvt && i_mvt < tk->i_elst_time + i_dur )
2515             {
2516                 break;
2517             }
2518             tk->i_elst_time += i_dur;
2519         }
2520
2521         if( (unsigned int)tk->i_elst >= elst->i_entry_count )
2522         {
2523             /* msg_Dbg( p_demux, "invalid number of entry in elst" ); */
2524             tk->i_elst = elst->i_entry_count - 1;
2525             tk->i_elst_time -= elst->i_segment_duration[tk->i_elst];
2526         }
2527
2528         if( elst->i_media_time[tk->i_elst] < 0 )
2529         {
2530             /* track offset */
2531             tk->i_elst_time += elst->i_segment_duration[tk->i_elst];
2532         }
2533     }
2534     if( i_elst_last != tk->i_elst )
2535     {
2536         msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
2537     }
2538 }
2539
2540 /* */
2541 static const char *MP4_ConvertMacCode( uint16_t i_code )
2542 {
2543     static const struct { const char *psz_iso639_1; uint16_t i_code; } p_cvt[] = {
2544         { "en",   0 }, { "fr",   1 }, { "de",   2 }, { "it",   3 }, { "nl",   4 },
2545         { "sv",   5 }, { "es",   6 }, { "da",   7 }, { "pt",   8 }, { "no",   9 },
2546         { "he",  10 }, { "ja",  11 }, { "ar",  12 }, { "fi",  13 }, { "el",  14 },
2547         { "is",  15 }, { "mt",  16 }, { "tr",  17 }, { "hr",  18 }, { "zh",  19 },
2548         { "ur",  20 }, { "hi",  21 }, { "th",  22 }, { "ko",  23 }, { "lt",  24 },
2549         { "pl",  25 }, { "hu",  26 }, { "et",  27 }, { "lv",  28 }, //{ "??",  29 },
2550         { "fo",  30 }, { "fa",  31 }, { "ru",  32 }, { "zh",  33 }, { "nl",  34 },
2551         { "ga",  35 }, { "sq",  36 }, { "ro",  37 }, { "cs",  38 }, { "sk",  39 },
2552         { "sl",  40 }, { "yi",  41 }, { "sr",  42 }, { "mk",  43 }, { "bg",  44 },
2553         { "uk",  45 }, { "be",  46 }, { "uz",  47 }, { "az",  48 }, { "kk",  48 },
2554         { "az",  50 }, { "hy",  51 }, { "ka",  52 }, { "mo",  53 }, { "ky",  54 },
2555         { "tg",  55 }, { "tk",  56 }, { "mn",  57 }, { "mn",  58 }, { "ps",  59 },
2556         { "ku",  60 }, { "ks",  61 }, { "sd",  62 }, { "bo",  63 }, { "ne",  64 },
2557         { "sa",  65 }, { "mr",  66 }, { "bn",  67 }, { "as",  68 }, { "gu",  69 },
2558         { "pa",  70 }, { "or",  71 }, { "ml",  72 }, { "kn",  73 }, { "ta",  74 },
2559         { "te",  75 }, { "si",  76 }, { "my",  77 }, { "km",  78 }, { "lo",  79 },
2560         { "vi",  80 }, { "id",  81 }, { "tl",  82 }, { "ms",  83 }, { "ms",  84 },
2561         { "am",  85 }, { "ti",  86 }, { "om",  87 }, { "so",  88 }, { "sw",  89 },
2562         { "rw",  90 }, { "rn",  91 }, { "ny",  92 }, { "mg",  93 }, { "eo",  94 },
2563
2564                                                      { "cy", 128 }, { "eu", 129 },
2565         { "ca", 130 }, { "la", 131 }, { "qu", 132 }, { "gn", 133 }, { "ay", 134 },
2566         { "tt", 135 }, { "ug", 136 }, { "dz", 137 }, { "jv", 138 }, { "su", 139 },
2567         { "gl", 140 }, { "af", 141 }, { "br", 142 }, { "iu", 143 }, { "gd", 144 },
2568         { "gv", 145 }, { "ga", 146 }, { "to", 147 }, { "el", 148 },
2569         /* */
2570         { NULL, 0 }
2571     };
2572     int i;
2573     for( i = 0; p_cvt[i].psz_iso639_1 != NULL; i++ )
2574     {
2575         if( p_cvt[i].i_code == i_code )
2576             return p_cvt[i].psz_iso639_1;
2577     }
2578     return "";
2579 }