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_shortname( N_("MP4") )
  60     set_capability( "demux", 242 )
  61     set_callbacks( Open, Close )
  62 vlc_module_end ()
  63
  64 /*****************************************************************************
  65  * Local prototypes
  66  *****************************************************************************/
  67 static int   Demux   ( demux_t * );
  68 static int   DemuxRef( demux_t *p_demux ){ (void)p_demux; return 0;}
  69 static int   Seek    ( demux_t *, mtime_t );
  70 static int   Control ( demux_t *, int, va_list );
  71
  72 /* Contain all information about a chunk */
  73 typedef struct
  74 {
  75     uint64_t     i_offset; /* absolute position of this chunk in the file */
  76     uint32_t     i_sample_description_index; /* index for SampleEntry to use */
  77     uint32_t     i_sample_count; /* how many samples in this chunk */
  78     uint32_t     i_sample_first; /* index of the first sample in this chunk */
  79
  80     /* now provide way to calculate pts, dts, and offset without to
  81         much memory and with fast acces */
  82
  83     /* with this we can calculate dts/pts without waste memory */
  84     uint64_t     i_first_dts;
  85     uint32_t     *p_sample_count_dts;
  86     uint32_t     *p_sample_delta_dts;   /* dts delta */
  87
  88     uint32_t     *p_sample_count_pts;
  89     int32_t      *p_sample_offset_pts;  /* pts-dts */
  90
  91     /* TODO if needed add pts
  92         but quickly *add* support for edts and seeking */
  93
  94 } mp4_chunk_t;
  95
  96  /* Contain all needed information for read all track with vlc */
  97 typedef struct
  98 {
  99     unsigned int i_track_ID;/* this should be unique */
 100
 101     int b_ok;               /* The track is usable */
 102     int b_enable;           /* is the trak enable by default */
 103     bool b_selected;  /* is the trak being played */
 104     bool b_chapter;   /* True when used for chapter only */
 105
 106     bool b_mac_encoding;
 107
 108     es_format_t fmt;
 109     es_out_id_t *p_es;
 110
 111     /* display size only ! */
 112     int i_width;
 113     int i_height;
 114
 115     /* more internal data */
 116     uint64_t        i_timescale;    /* time scale for this track only */
 117
 118     /* elst */
 119     int             i_elst;         /* current elst */
 120     int64_t         i_elst_time;    /* current elst start time (in movie time scale)*/
 121     MP4_Box_t       *p_elst;        /* elst (could be NULL) */
 122
 123     /* give the next sample to read, i_chunk is to find quickly where
 124       the sample is located */
 125     uint32_t         i_sample;       /* next sample to read */
 126     uint32_t         i_chunk;        /* chunk where next sample is stored */
 127     /* total count of chunk and sample */
 128     uint32_t         i_chunk_count;
 129     uint32_t         i_sample_count;
 130
 131     mp4_chunk_t    *chunk; /* always defined  for each chunk */
 132
 133     /* sample size, p_sample_size defined only if i_sample_size == 0
 134         else i_sample_size is size for all sample */
 135     uint32_t         i_sample_size;
 136     uint32_t         *p_sample_size; /* XXX perhaps add file offset if take
 137                                     too much time to do sumations each time*/
 138
 139     MP4_Box_t *p_stbl;  /* will contain all timing information */
 140     MP4_Box_t *p_stsd;  /* will contain all data to initialize decoder */
 141     MP4_Box_t *p_sample;/* point on actual sdsd */
 142
 143     bool b_drms;
 144     void      *p_drms;
 145     MP4_Box_t *p_skcr;
 146
 147 } mp4_track_t;
 148
 149
 150 struct demux_sys_t
 151 {
 152     MP4_Box_t    *p_root;      /* container for the whole file */
 153
 154     mtime_t      i_pcr;
 155
 156     uint64_t     i_time;         /* time position of the presentation
 157                                   * in movie timescale */
 158     uint64_t     i_timescale;    /* movie time scale */
 159     uint64_t     i_duration;     /* movie duration */
 160     unsigned int i_tracks;       /* number of tracks */
 161     mp4_track_t  *track;         /* array of track */
 162
 163     /* */
 164     MP4_Box_t    *p_tref_chap;
 165
 166     /* */
 167     input_title_t *p_title;
 168 };
 169
 170 /*****************************************************************************
 171  * Declaration of local function
 172  *****************************************************************************/
 173 static void MP4_TrackCreate ( demux_t *, mp4_track_t *, MP4_Box_t  *, bool b_force_enable );
 174 static void MP4_TrackDestroy(  mp4_track_t * );
 175
 176 static int  MP4_TrackSelect ( demux_t *, mp4_track_t *, mtime_t );
 177 static void MP4_TrackUnselect(demux_t *, mp4_track_t * );
 178
 179 static int  MP4_TrackSeek   ( demux_t *, mp4_track_t *, mtime_t );
 180
 181 static uint64_t MP4_TrackGetPos    ( mp4_track_t * );
 182 static int      MP4_TrackSampleSize( mp4_track_t * );
 183 static int      MP4_TrackNextSample( demux_t *, mp4_track_t * );
 184 static void     MP4_TrackSetELST( demux_t *, mp4_track_t *, int64_t );
 185
 186 static void     MP4_UpdateSeekpoint( demux_t * );
 187 static const char *MP4_ConvertMacCode( uint16_t );
 188
 189 /* Return time in s of a track */
 190 static inline int64_t MP4_TrackGetDTS( demux_t *p_demux, mp4_track_t *p_track )
 191 {
 192 #define chunk p_track->chunk[p_track->i_chunk]
 193
 194     unsigned int i_index = 0;
 195     unsigned int i_sample = p_track->i_sample - chunk.i_sample_first;
 196     int64_t i_dts = chunk.i_first_dts;
 197
 198     while( i_sample > 0 )
 199     {
 200         if( i_sample > chunk.p_sample_count_dts[i_index] )
 201         {
 202             i_dts += chunk.p_sample_count_dts[i_index] *
 203                 chunk.p_sample_delta_dts[i_index];
 204             i_sample -= chunk.p_sample_count_dts[i_index];
 205             i_index++;
 206         }
 207         else
 208         {
 209             i_dts += i_sample * chunk.p_sample_delta_dts[i_index];
 210             i_sample = 0;
 211             break;
 212         }
 213     }
 214
 215 #undef chunk
 216
 217     /* now handle elst */
 218     if( p_track->p_elst )
 219     {
 220         demux_sys_t         *p_sys = p_demux->p_sys;
 221         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
 222
 223         /* convert to offset */
 224         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
 225               elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
 226             elst->i_media_time[p_track->i_elst] > 0 )
 227         {
 228             i_dts -= elst->i_media_time[p_track->i_elst];
 229         }
 230
 231         /* add i_elst_time */
 232         i_dts += p_track->i_elst_time * p_track->i_timescale /
 233             p_sys->i_timescale;
 234
 235         if( i_dts < 0 ) i_dts = 0;
 236     }
 237
 238     return INT64_C(1000000) * i_dts / p_track->i_timescale;
 239 }
 240
 241 static inline int64_t MP4_TrackGetPTSDelta( mp4_track_t *p_track )
 242 {
 243     mp4_chunk_t *ck = &p_track->chunk[p_track->i_chunk];
 244     unsigned int i_index = 0;
 245     unsigned int i_sample = p_track->i_sample - ck->i_sample_first;
 246
 247     if( ck->p_sample_count_pts == NULL || ck->p_sample_offset_pts == NULL )
 248         return -1;
 249
 250     for( i_index = 0;; i_index++ )
 251     {
 252         if( i_sample < ck->p_sample_count_pts[i_index] )
 253             return ck->p_sample_offset_pts[i_index] * INT64_C(1000000) /
 254                    (int64_t)p_track->i_timescale;
 255
 256         i_sample -= ck->p_sample_count_pts[i_index];
 257     }
 258 }
 259
 260 static inline int64_t MP4_GetMoviePTS(demux_sys_t *p_sys )
 261 {
 262     return INT64_C(1000000) * p_sys->i_time / p_sys->i_timescale;
 263 }
 264
 265 static void LoadChapter( demux_t  *p_demux );
 266
 267 /*****************************************************************************
 268  * Open: check file and initializes MP4 structures
 269  *****************************************************************************/
 270 static int Open( vlc_object_t * p_this )
 271 {
 272     demux_t  *p_demux = (demux_t *)p_this;
 273     demux_sys_t     *p_sys;
 274
 275     const uint8_t   *p_peek;
 276
 277     MP4_Box_t       *p_ftyp;
 278     MP4_Box_t       *p_rmra;
 279     MP4_Box_t       *p_mvhd;
 280     MP4_Box_t       *p_trak;
 281
 282     unsigned int    i;
 283     bool      b_seekable;
 284     bool      b_enabled_es;
 285
 286     /* A little test to see if it could be a mp4 */
 287     if( stream_Peek( p_demux->s, &p_peek, 8 ) < 8 ) return VLC_EGENERIC;
 288
 289     switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
 290     {
 291         case FOURCC_ftyp:
 292         case FOURCC_moov:
 293         case FOURCC_foov:
 294         case FOURCC_moof:
 295         case FOURCC_mdat:
 296         case FOURCC_udta:
 297         case FOURCC_free:
 298         case FOURCC_skip:
 299         case FOURCC_wide:
 300         case VLC_FOURCC( 'p', 'n', 'o', 't' ):
 301             break;
 302          default:
 303             return VLC_EGENERIC;
 304     }
 305
 306     /* I need to seek */
 307     stream_Control( p_demux->s, STREAM_CAN_SEEK, &b_seekable );
 308     if( !b_seekable )
 309     {
 310         msg_Warn( p_demux, "MP4 plugin discarded (unseekable)" );
 311         return VLC_EGENERIC;
 312     }
 313
 314     /*Set exported functions */
 315     p_demux->pf_demux = Demux;
 316     p_demux->pf_control = Control;
 317
 318     /* create our structure that will contains all data */
 319     p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
 320     memset( p_sys, 0, sizeof( demux_sys_t ) );
 321
 322     /* Now load all boxes ( except raw data ) */
 323     if( ( p_sys->p_root = MP4_BoxGetRoot( p_demux->s ) ) == NULL )
 324     {
 325         msg_Warn( p_demux, "MP4 plugin discarded (not a valid file)" );
 326         goto error;
 327     }
 328
 329     MP4_BoxDumpStructure( p_demux->s, p_sys->p_root );
 330
 331     if( ( p_ftyp = MP4_BoxGet( p_sys->p_root, "/ftyp" ) ) )
 332     {
 333         switch( p_ftyp->data.p_ftyp->i_major_brand )
 334         {
 335             case( FOURCC_isom ):
 336                 msg_Dbg( p_demux,
 337                          "ISO Media file (isom) version %d.",
 338                          p_ftyp->data.p_ftyp->i_minor_version );
 339                 break;
 340             default:
 341                 msg_Dbg( p_demux,
 342                          "unrecognized major file specification (%4.4s).",
 343                           (char*)&p_ftyp->data.p_ftyp->i_major_brand );
 344                 break;
 345         }
 346     }
 347     else
 348     {
 349         msg_Dbg( p_demux, "file type box missing (assuming ISO Media file)" );
 350     }
 351
 352     /* the file need to have one moov box */
 353     if( MP4_BoxCount( p_sys->p_root, "/moov" ) <= 0 )
 354     {
 355         MP4_Box_t *p_foov = MP4_BoxGet( p_sys->p_root, "/foov" );
 356
 357         if( !p_foov )
 358         {
 359             msg_Err( p_demux, "MP4 plugin discarded (no moov box)" );
 360             goto error;
 361         }
 362         /* we have a free box as a moov, rename it */
 363         p_foov->i_type = FOURCC_moov;
 364     }
 365
 366     if( ( p_rmra = MP4_BoxGet( p_sys->p_root,  "/moov/rmra" ) ) )
 367     {
 368         int        i_count = MP4_BoxCount( p_rmra, "rmda" );
 369         int        i;
 370
 371         msg_Dbg( p_demux, "detected playlist mov file (%d ref)", i_count );
 372
 373         input_thread_t *p_input = vlc_object_find( p_demux, VLC_OBJECT_INPUT, FIND_PARENT );
 374         input_item_t *p_current = input_GetItem( p_input );
 375
 376         for( i = 0; i < i_count; i++ )
 377         {
 378             MP4_Box_t *p_rdrf = MP4_BoxGet( p_rmra, "rmda[%d]/rdrf", i );
 379             char      *psz_ref;
 380             uint32_t  i_ref_type;
 381
 382             if( !p_rdrf || !( psz_ref = strdup( p_rdrf->data.p_rdrf->psz_ref ) ) )
 383             {
 384                 continue;
 385             }
 386             i_ref_type = p_rdrf->data.p_rdrf->i_ref_type;
 387
 388             msg_Dbg( p_demux, "new ref=`%s' type=%4.4s",
 389                      psz_ref, (char*)&i_ref_type );
 390
 391             if( i_ref_type == VLC_FOURCC( 'u', 'r', 'l', ' ' ) )
 392             {
 393                 if( strstr( psz_ref, "qt5gateQT" ) )
 394                 {
 395                     msg_Dbg( p_demux, "ignoring pseudo ref =`%s'", psz_ref );
 396                     continue;
 397                 }
 398                 if( !strncmp( psz_ref, "http://", 7 ) ||
 399                     !strncmp( psz_ref, "rtsp://", 7 ) )
 400                 {
 401                     ;
 402                 }
 403                 else
 404                 {
 405                     char *psz_absolute;
 406                     char *psz_path = strdup( p_demux->psz_path );
 407                     char *end = strrchr( psz_path, '/' );
 408                     if( end ) end[1] = '\0';
 409                     else *psz_path = '\0';
 410
 411                     if( asprintf( &psz_absolute, "%s://%s%s",
 412                                   p_demux->psz_access, psz_path, psz_ref ) < 0 )
 413                         return VLC_ENOMEM;
 414
 415                     free( psz_ref );
 416                     psz_ref = psz_absolute;
 417                     free( psz_path );
 418                 }
 419                 msg_Dbg( p_demux, "adding ref = `%s'", psz_ref );
 420                 input_item_t *p_input = input_item_New( p_demux, psz_ref, NULL );
 421                 input_item_CopyOptions( p_current, p_input );
 422                 input_item_AddSubItem( p_current, p_input );
 423                 vlc_gc_decref( p_input );
 424             }
 425             else
 426             {
 427                 msg_Err( p_demux, "unknown ref type=%4.4s FIXME (send a bug report)",
 428                          (char*)&p_rdrf->data.p_rdrf->i_ref_type );
 429             }
 430             free( psz_ref );
 431         }
 432         vlc_object_release( p_input );
 433     }
 434
 435     if( !(p_mvhd = MP4_BoxGet( p_sys->p_root, "/moov/mvhd" ) ) )
 436     {
 437         if( !p_rmra )
 438         {
 439             msg_Err( p_demux, "cannot find /moov/mvhd" );
 440             goto error;
 441         }
 442         else
 443         {
 444             msg_Warn( p_demux, "cannot find /moov/mvhd (pure ref file)" );
 445             p_demux->pf_demux = DemuxRef;
 446             return VLC_SUCCESS;
 447         }
 448     }
 449     else
 450     {
 451         p_sys->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 452         if( p_sys->i_timescale == 0 )
 453         {
 454             msg_Err( p_this, "bad timescale" );
 455             goto error;
 456         }
 457         p_sys->i_duration = p_mvhd->data.p_mvhd->i_duration;
 458     }
 459
 460     if( !( p_sys->i_tracks = MP4_BoxCount( p_sys->p_root, "/moov/trak" ) ) )
 461     {
 462         msg_Err( p_demux, "cannot find any /moov/trak" );
 463         goto error;
 464     }
 465     msg_Dbg( p_demux, "found %d track%c",
 466                         p_sys->i_tracks,
 467                         p_sys->i_tracks ? 's':' ' );
 468
 469     /* allocate memory */
 470     p_sys->track = calloc( p_sys->i_tracks, sizeof( mp4_track_t ) );
 471     if( p_sys->track == NULL )
 472         goto error;
 473     memset( p_sys->track, 0, p_sys->i_tracks * sizeof( mp4_track_t ) );
 474
 475     /* Search the first chap reference (like quicktime) and
 476      * check that at least 1 stream is enabled */
 477     p_sys->p_tref_chap = NULL;
 478     b_enabled_es = false;
 479     for( i = 0; i < p_sys->i_tracks; i++ )
 480     {
 481         MP4_Box_t *p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 482
 483
 484         MP4_Box_t *p_tkhd = MP4_BoxGet( p_trak, "tkhd" );
 485         if( p_tkhd && (p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED) )
 486             b_enabled_es = true;
 487
 488         MP4_Box_t *p_chap = MP4_BoxGet( p_trak, "tref/chap", i );
 489         if( p_chap && p_chap->data.p_tref_generic->i_entry_count > 0 && !p_sys->p_tref_chap )
 490             p_sys->p_tref_chap = p_chap;
 491     }
 492
 493     /* now process each track and extract all usefull information */
 494     for( i = 0; i < p_sys->i_tracks; i++ )
 495     {
 496         p_trak = MP4_BoxGet( p_sys->p_root, "/moov/trak[%d]", i );
 497         MP4_TrackCreate( p_demux, &p_sys->track[i], p_trak, !b_enabled_es );
 498
 499         if( p_sys->track[i].b_ok && !p_sys->track[i].b_chapter )
 500         {
 501             const char *psz_cat;
 502             switch( p_sys->track[i].fmt.i_cat )
 503             {
 504                 case( VIDEO_ES ):
 505                     psz_cat = "video";
 506                     break;
 507                 case( AUDIO_ES ):
 508                     psz_cat = "audio";
 509                     break;
 510                 case( SPU_ES ):
 511                     psz_cat = "subtitle";
 512                     break;
 513
 514                 default:
 515                     psz_cat = "unknown";
 516                     break;
 517             }
 518
 519             msg_Dbg( p_demux, "adding track[Id 0x%x] %s (%s) language %s",
 520                      p_sys->track[i].i_track_ID, psz_cat,
 521                      p_sys->track[i].b_enable ? "enable":"disable",
 522                      p_sys->track[i].fmt.psz_language ?
 523                      p_sys->track[i].fmt.psz_language : "undef" );
 524         }
 525         else if( p_sys->track[i].b_ok && p_sys->track[i].b_chapter )
 526         {
 527             msg_Dbg( p_demux, "using track[Id 0x%x] for chapter language %s",
 528                      p_sys->track[i].i_track_ID,
 529                      p_sys->track[i].fmt.psz_language ?
 530                      p_sys->track[i].fmt.psz_language : "undef" );
 531         }
 532         else
 533         {
 534             msg_Dbg( p_demux, "ignoring track[Id 0x%x]",
 535                      p_sys->track[i].i_track_ID );
 536         }
 537     }
 538
 539     /* */
 540     LoadChapter( p_demux );
 541
 542     return VLC_SUCCESS;
 543
 544 error:
 545     if( p_sys->p_root )
 546     {
 547         MP4_BoxFree( p_demux->s, p_sys->p_root );
 548     }
 549     free( p_sys );
 550     return VLC_EGENERIC;
 551 }
 552
 553 /*****************************************************************************
 554  * Demux: read packet and send them to decoders
 555  *****************************************************************************
 556  * TODO check for newly selected track (ie audio upt to now )
 557  *****************************************************************************/
 558 static int Demux( demux_t *p_demux )
 559 {
 560     demux_sys_t *p_sys = p_demux->p_sys;
 561     unsigned int i_track;
 562
 563
 564     unsigned int i_track_selected;
 565
 566     /* check for newly selected/unselected track */
 567     for( i_track = 0, i_track_selected = 0; i_track < p_sys->i_tracks;
 568          i_track++ )
 569     {
 570         mp4_track_t *tk = &p_sys->track[i_track];
 571         bool b;
 572
 573         if( !tk->b_ok || tk->b_chapter ||
 574             ( tk->b_selected && tk->i_sample >= tk->i_sample_count ) )
 575         {
 576             continue;
 577         }
 578
 579         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE, tk->p_es, &b );
 580
 581         if( tk->b_selected && !b )
 582         {
 583             MP4_TrackUnselect( p_demux, tk );
 584         }
 585         else if( !tk->b_selected && b)
 586         {
 587             MP4_TrackSelect( p_demux, tk, MP4_GetMoviePTS( p_sys ) );
 588         }
 589
 590         if( tk->b_selected )
 591         {
 592             i_track_selected++;
 593         }
 594     }
 595
 596     if( i_track_selected <= 0 )
 597     {
 598         p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 599         if( p_sys->i_timescale > 0 )
 600         {
 601             int64_t i_length = (mtime_t)1000000 *
 602                                (mtime_t)p_sys->i_duration /
 603                                (mtime_t)p_sys->i_timescale;
 604             if( MP4_GetMoviePTS( p_sys ) >= i_length )
 605                 return 0;
 606             return 1;
 607         }
 608
 609         msg_Warn( p_demux, "no track selected, exiting..." );
 610         return 0;
 611     }
 612
 613     /* */
 614     MP4_UpdateSeekpoint( p_demux );
 615
 616     /* first wait for the good time to read a packet */
 617     es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_pcr + 1 );
 618
 619     p_sys->i_pcr = MP4_GetMoviePTS( p_sys );
 620
 621     /* we will read 100ms for each stream so ...*/
 622     p_sys->i_time += __MAX( p_sys->i_timescale / 10 , 1 );
 623
 624     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 625     {
 626         mp4_track_t *tk = &p_sys->track[i_track];
 627
 628         if( !tk->b_ok || tk->b_chapter || !tk->b_selected || tk->i_sample >= tk->i_sample_count )
 629             continue;
 630
 631         while( MP4_TrackGetDTS( p_demux, tk ) < MP4_GetMoviePTS( p_sys ) )
 632         {
 633 #if 0
 634             msg_Dbg( p_demux, "tk(%i)=%lld mv=%lld", i_track,
 635                      MP4_TrackGetDTS( p_demux, tk ),
 636                      MP4_GetMoviePTS( p_sys ) );
 637 #endif
 638
 639             if( MP4_TrackSampleSize( tk ) > 0 )
 640             {
 641                 block_t *p_block;
 642                 int64_t i_delta;
 643
 644                 /* go,go go ! */
 645                 if( stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
 646                 {
 647                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)",
 648                               tk->i_track_ID );
 649                     MP4_TrackUnselect( p_demux, tk );
 650                     break;
 651                 }
 652
 653                 /* now read pes */
 654                 if( !(p_block =
 655                          stream_Block( p_demux->s, MP4_TrackSampleSize(tk) )) )
 656                 {
 657                     msg_Warn( p_demux, "track[0x%x] will be disabled (eof?)",
 658                               tk->i_track_ID );
 659                     MP4_TrackUnselect( p_demux, tk );
 660                     break;
 661                 }
 662
 663                 if( tk->b_drms && tk->p_drms )
 664                 {
 665                     if( tk->p_skcr )
 666                     {
 667                         uint32_t p_key[4];
 668                         drms_get_p_key( tk->p_drms, p_key );
 669
 670                         for( int i_pos = tk->p_skcr->data.p_skcr->i_init; i_pos < p_block->i_buffer; )
 671                         {
 672                             int n = __MIN( tk->p_skcr->data.p_skcr->i_encr, p_block->i_buffer - i_pos );
 673                             drms_decrypt( tk->p_drms, (uint32_t*)&p_block->p_buffer[i_pos], n, p_key );
 674                             i_pos += n;
 675                             i_pos += __MIN( tk->p_skcr->data.p_skcr->i_decr, p_block->i_buffer - i_pos );
 676                         }
 677                     }
 678                     else
 679                     {
 680                         drms_decrypt( tk->p_drms, (uint32_t*)p_block->p_buffer,
 681                                       p_block->i_buffer, NULL );
 682                     }
 683                 }
 684                 else if( tk->fmt.i_cat == SPU_ES )
 685                 {
 686                     if( tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) &&
 687                         p_block->i_buffer >= 2 )
 688                     {
 689                         uint16_t i_size = GetWBE( p_block->p_buffer );
 690
 691                         if( i_size + 2 <= p_block->i_buffer )
 692                         {
 693                             char *p;
 694                             /* remove the length field, and append a '\0' */
 695                             memmove( &p_block->p_buffer[0],
 696                                      &p_block->p_buffer[2], i_size );
 697                             p_block->p_buffer[i_size] = '\0';
 698                             p_block->i_buffer = i_size + 1;
 699
 700                             /* convert \r -> \n */
 701                             while( ( p = strchr((char *) p_block->p_buffer, '\r' ) ) )
 702                             {
 703                                 *p = '\n';
 704                             }
 705                         }
 706                         else
 707                         {
 708                             /* Invalid */
 709                             p_block->i_buffer = 0;
 710                         }
 711                     }
 712                 }
 713                 /* dts */
 714                 p_block->i_dts = MP4_TrackGetDTS( p_demux, tk ) + 1;
 715                 /* pts */
 716                 i_delta = MP4_TrackGetPTSDelta( tk );
 717                 if( i_delta != -1 )
 718                     p_block->i_pts = p_block->i_dts + i_delta;
 719                 else if( tk->fmt.i_cat != VIDEO_ES )
 720                     p_block->i_pts = p_block->i_dts;
 721                 else
 722                     p_block->i_pts = 0;
 723
 724                 if( !tk->b_drms || ( tk->b_drms && tk->p_drms ) )
 725                     es_out_Send( p_demux->out, tk->p_es, p_block );
 726             }
 727
 728             /* Next sample */
 729             if( MP4_TrackNextSample( p_demux, tk ) )
 730                 break;
 731         }
 732     }
 733
 734     return 1;
 735 }
 736
 737 static void MP4_UpdateSeekpoint( demux_t *p_demux )
 738 {
 739     demux_sys_t *p_sys = p_demux->p_sys;
 740     int64_t i_time;
 741     int i;
 742     if( !p_sys->p_title )
 743         return;
 744     i_time = MP4_GetMoviePTS( p_sys );
 745     for( i = 0; i < p_sys->p_title->i_seekpoint; i++ )
 746     {
 747         if( i_time < p_sys->p_title->seekpoint[i]->i_time_offset )
 748             break;
 749     }
 750     i--;
 751
 752     if( i != p_demux->info.i_seekpoint && i >= 0 )
 753     {
 754         p_demux->info.i_seekpoint = i;
 755         p_demux->info.i_update |= INPUT_UPDATE_SEEKPOINT;
 756     }
 757 }
 758 /*****************************************************************************
 759  * Seek: Got to i_date
 760 ******************************************************************************/
 761 static int Seek( demux_t *p_demux, mtime_t i_date )
 762 {
 763     demux_sys_t *p_sys = p_demux->p_sys;
 764     unsigned int i_track;
 765
 766     /* First update update global time */
 767     p_sys->i_time = i_date * p_sys->i_timescale / 1000000;
 768     p_sys->i_pcr  = i_date;
 769
 770     /* Now for each stream try to go to this time */
 771     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
 772     {
 773         mp4_track_t *tk = &p_sys->track[i_track];
 774         MP4_TrackSeek( p_demux, tk, i_date );
 775     }
 776     MP4_UpdateSeekpoint( p_demux );
 777
 778     es_out_Control( p_demux->out, ES_OUT_SET_NEXT_DISPLAY_TIME, i_date );
 779
 780     return VLC_SUCCESS;
 781 }
 782
 783 /*****************************************************************************
 784  * Control:
 785  *****************************************************************************/
 786 static int Control( demux_t *p_demux, int i_query, va_list args )
 787 {
 788     demux_sys_t *p_sys = p_demux->p_sys;
 789
 790     double f, *pf;
 791     int64_t i64, *pi64;
 792
 793     switch( i_query )
 794     {
 795         case DEMUX_GET_POSITION:
 796             pf = (double*)va_arg( args, double * );
 797             if( p_sys->i_duration > 0 )
 798             {
 799                 *pf = (double)p_sys->i_time / (double)p_sys->i_duration;
 800             }
 801             else
 802             {
 803                 *pf = 0.0;
 804             }
 805             return VLC_SUCCESS;
 806
 807         case DEMUX_SET_POSITION:
 808             f = (double)va_arg( args, double );
 809             if( p_sys->i_timescale > 0 )
 810             {
 811                 i64 = (int64_t)( f * (double)1000000 *
 812                                  (double)p_sys->i_duration /
 813                                  (double)p_sys->i_timescale );
 814                 return Seek( p_demux, i64 );
 815             }
 816             else return VLC_SUCCESS;
 817
 818         case DEMUX_GET_TIME:
 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_time /
 824                         (mtime_t)p_sys->i_timescale;
 825             }
 826             else *pi64 = 0;
 827             return VLC_SUCCESS;
 828
 829         case DEMUX_SET_TIME:
 830             i64 = (int64_t)va_arg( args, int64_t );
 831             return Seek( p_demux, i64 );
 832
 833         case DEMUX_GET_LENGTH:
 834             pi64 = (int64_t*)va_arg( args, int64_t * );
 835             if( p_sys->i_timescale > 0 )
 836             {
 837                 *pi64 = (mtime_t)1000000 *
 838                         (mtime_t)p_sys->i_duration /
 839                         (mtime_t)p_sys->i_timescale;
 840             }
 841             else *pi64 = 0;
 842             return VLC_SUCCESS;
 843
 844         case DEMUX_GET_FPS:
 845             msg_Warn( p_demux, "DEMUX_GET_FPS unimplemented !!" );
 846             return VLC_EGENERIC;
 847
 848         case DEMUX_GET_META:
 849         {
 850             vlc_meta_t *p_meta = (vlc_meta_t *)va_arg( args, vlc_meta_t*);
 851             MP4_Box_t  *p_0xa9xxx;
 852
 853             MP4_Box_t  *p_udta = MP4_BoxGet( p_sys->p_root, "/moov/udta/meta/ilst" );
 854             if( p_udta == NULL )
 855             {
 856                 p_udta = MP4_BoxGet( p_sys->p_root, "/moov/udta" );
 857                 if( p_udta == NULL )
 858                 {
 859                     return VLC_EGENERIC;
 860                 }
 861             }
 862
 863             for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
 864                  p_0xa9xxx = p_0xa9xxx->p_next )
 865             {
 866
 867                 if( !p_0xa9xxx || !p_0xa9xxx->data.p_0xa9xxx )
 868                     continue;
 869
 870                 /* FIXME FIXME: should convert from whatever the character
 871                  * encoding of MP4 meta data is to UTF-8. */
 872 #define SET(fct) do { char *psz_utf = strdup( p_0xa9xxx->data.p_0xa9xxx->psz_text ? p_0xa9xxx->data.p_0xa9xxx->psz_text : "" ); \
 873     if( psz_utf ) { EnsureUTF8( psz_utf );  \
 874                     fct( p_meta, psz_utf ); free( psz_utf ); } } while(0)
 875
 876                 /* XXX Becarefull p_udta can have box that are not 0xa9xx */
 877                 switch( p_0xa9xxx->i_type )
 878                 {
 879                 case FOURCC_0xa9nam: /* Full name */
 880                     SET( vlc_meta_SetTitle );
 881                     break;
 882                 case FOURCC_0xa9aut:
 883                     SET( vlc_meta_SetArtist );
 884                     break;
 885                 case FOURCC_0xa9ART:
 886                     SET( vlc_meta_SetArtist );
 887                     break;
 888                 case FOURCC_0xa9cpy:
 889                     SET( vlc_meta_SetCopyright );
 890                     break;
 891                 case FOURCC_0xa9day: /* Creation Date */
 892                     SET( vlc_meta_SetDate );
 893                     break;
 894                 case FOURCC_0xa9des: /* Description */
 895                     SET( vlc_meta_SetDescription );
 896                     break;
 897                 case FOURCC_0xa9gen: /* Genre */
 898                     SET( vlc_meta_SetGenre );
 899                     break;
 900
 901                 case FOURCC_0xa9alb: /* Album */
 902                     SET( vlc_meta_SetAlbum );
 903                     break;
 904
 905                 case FOURCC_0xa9trk: /* Track */
 906                     SET( vlc_meta_SetTrackNum );
 907                     break;
 908
 909                 case FOURCC_0xa9cmt: /* Commment */
 910                     SET( vlc_meta_SetDescription );
 911                     break;
 912
 913                 case FOURCC_0xa9url: /* URL */
 914                     SET( vlc_meta_SetURL );
 915                     break;
 916
 917                 case FOURCC_0xa9enc: /* Encoded By */
 918                     SET( vlc_meta_SetEncodedBy );
 919                     break;
 920
 921                 case FOURCC_0xa9swr:
 922                 case FOURCC_0xa9inf: /* Information */
 923                 case FOURCC_0xa9dir: /* Director */
 924                 case FOURCC_0xa9dis: /* Disclaimer */
 925                 case FOURCC_0xa9req: /* Requirements */
 926                 case FOURCC_0xa9fmt: /* Original Format */
 927                 case FOURCC_0xa9dsa: /* Display Source As */
 928                 case FOURCC_0xa9hst: /* Host Computer */
 929                 case FOURCC_0xa9prd: /* Producer */
 930                 case FOURCC_0xa9prf: /* Performers */
 931                 case FOURCC_0xa9ope: /* Original Performer */
 932                 case FOURCC_0xa9src: /* Providers Source Content */
 933                 case FOURCC_0xa9wrt: /* Writer */
 934                 case FOURCC_0xa9com: /* Composer */
 935                 case FOURCC_WLOC:    /* Window Location */
 936                     /* TODO one day, but they aren't really meaningfull */
 937                     break;
 938 #undef SET
 939
 940                 default:
 941                     break;
 942                 }
 943             }
 944             return VLC_SUCCESS;
 945         }
 946
 947         case DEMUX_GET_TITLE_INFO:
 948         {
 949             input_title_t ***ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
 950             int *pi_int    = (int*)va_arg( args, int* );
 951             int *pi_title_offset = (int*)va_arg( args, int* );
 952             int *pi_seekpoint_offset = (int*)va_arg( args, int* );
 953
 954             if( !p_sys->p_title )
 955                 return VLC_EGENERIC;
 956
 957             *pi_int = 1;
 958             *ppp_title = malloc( sizeof( input_title_t**) );
 959             (*ppp_title)[0] = vlc_input_title_Duplicate( p_sys->p_title );
 960             *pi_title_offset = 0;
 961             *pi_seekpoint_offset = 0;
 962             return VLC_SUCCESS;
 963         }
 964         case DEMUX_SET_TITLE:
 965         {
 966             const int i_title = (int)va_arg( args, int );
 967             if( !p_sys->p_title || i_title != 0 )
 968                 return VLC_EGENERIC;
 969             return VLC_SUCCESS;
 970         }
 971         case DEMUX_SET_SEEKPOINT:
 972         {
 973             const int i_seekpoint = (int)va_arg( args, int );
 974             if( !p_sys->p_title )
 975                 return VLC_EGENERIC;
 976             return Seek( p_demux, p_sys->p_title->seekpoint[i_seekpoint]->i_time_offset );
 977         }
 978
 979         case DEMUX_SET_NEXT_DEMUX_TIME:
 980         case DEMUX_SET_GROUP:
 981         case DEMUX_HAS_UNSUPPORTED_META:
 982         case DEMUX_GET_ATTACHMENTS:
 983             return VLC_EGENERIC;
 984
 985         default:
 986             msg_Warn( p_demux, "control query %u unimplemented", i_query );
 987             return VLC_EGENERIC;
 988     }
 989 }
 990
 991 /*****************************************************************************
 992  * Close: frees unused data
 993  *****************************************************************************/
 994 static void Close ( vlc_object_t * p_this )
 995 {
 996     demux_t *  p_demux = (demux_t *)p_this;
 997     demux_sys_t *p_sys = p_demux->p_sys;
 998     unsigned int i_track;
 999
1000     msg_Dbg( p_demux, "freeing all memory" );
1001
1002     MP4_BoxFree( p_demux->s, p_sys->p_root );
1003     for( i_track = 0; i_track < p_sys->i_tracks; i_track++ )
1004     {
1005         MP4_TrackDestroy(  &p_sys->track[i_track] );
1006     }
1007     FREENULL( p_sys->track );
1008
1009     if( p_sys->p_title )
1010         vlc_input_title_Delete( p_sys->p_title );
1011
1012     free( p_sys );
1013 }
1014
1015
1016
1017 /****************************************************************************
1018  * Local functions, specific to vlc
1019  ****************************************************************************/
1020 /* Chapters */
1021 static void LoadChapterGpac( demux_t  *p_demux, MP4_Box_t *p_chpl )
1022 {
1023     demux_sys_t *p_sys = p_demux->p_sys;
1024     int i;
1025
1026     p_sys->p_title = vlc_input_title_New();
1027     for( i = 0; i < p_chpl->data.p_chpl->i_chapter; i++ )
1028     {
1029         seekpoint_t *s = vlc_seekpoint_New();
1030
1031         s->psz_name = strdup( p_chpl->data.p_chpl->chapter[i].psz_name );
1032         EnsureUTF8( s->psz_name );
1033         s->i_time_offset = p_chpl->data.p_chpl->chapter[i].i_start / 10;
1034         TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
1035     }
1036 }
1037 static void LoadChapterApple( demux_t  *p_demux, mp4_track_t *tk )
1038 {
1039     demux_sys_t *p_sys = p_demux->p_sys;
1040
1041     for( tk->i_sample = 0; tk->i_sample < tk->i_sample_count; tk->i_sample++ )
1042     {
1043         const int64_t i_dts = MP4_TrackGetDTS( p_demux, tk );
1044         const int64_t i_pts_delta = MP4_TrackGetPTSDelta( tk );
1045         const unsigned int i_size = MP4_TrackSampleSize( tk );
1046
1047         if( i_size > 0 && !stream_Seek( p_demux->s, MP4_TrackGetPos( tk ) ) )
1048         {
1049             char p_buffer[256];
1050             const int i_read = stream_Read( p_demux->s, p_buffer, __MIN( sizeof(p_buffer), i_size ) );
1051             const int i_len = __MIN( GetWBE(p_buffer), i_read-2 );
1052
1053             if( i_len > 0 )
1054             {
1055                 seekpoint_t *s = vlc_seekpoint_New();
1056
1057                 s->psz_name = strndup( &p_buffer[2], i_len );
1058                 EnsureUTF8( s->psz_name );
1059
1060                 s->i_time_offset = i_dts + __MAX( i_pts_delta, 0 );
1061
1062                 if( !p_sys->p_title )
1063                     p_sys->p_title = vlc_input_title_New();
1064                 TAB_APPEND( p_sys->p_title->i_seekpoint, p_sys->p_title->seekpoint, s );
1065             }
1066         }
1067         if( tk->i_sample+1 >= tk->chunk[tk->i_chunk].i_sample_first +
1068                               tk->chunk[tk->i_chunk].i_sample_count )
1069             tk->i_chunk++;
1070     }
1071 }
1072 static void LoadChapter( demux_t  *p_demux )
1073 {
1074     demux_sys_t *p_sys = p_demux->p_sys;
1075     MP4_Box_t *p_chpl;
1076
1077     if( ( p_chpl = MP4_BoxGet( p_sys->p_root, "/moov/udta/chpl" ) ) && p_chpl->data.p_chpl->i_chapter > 0 )
1078     {
1079         LoadChapterGpac( p_demux, p_chpl );
1080     }
1081     else if( p_sys->p_tref_chap )
1082     {
1083         MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
1084         unsigned int i, j;
1085
1086         /* Load the first subtitle track like quicktime */
1087         for( i = 0; i < p_chap->i_entry_count; i++ )
1088         {
1089             for( j = 0; j < p_sys->i_tracks; j++ )
1090             {
1091                 mp4_track_t *tk = &p_sys->track[j];
1092                 if( tk->b_ok && tk->i_track_ID == p_chap->i_track_ID[i] &&
1093                     tk->fmt.i_cat == SPU_ES && tk->fmt.i_codec == VLC_FOURCC( 's', 'u', 'b', 't' ) )
1094                     break;
1095             }
1096             if( j < p_sys->i_tracks )
1097             {
1098                 LoadChapterApple( p_demux, &p_sys->track[j] );
1099                 break;
1100             }
1101         }
1102     }
1103 }
1104
1105 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
1106 static int TrackCreateChunksIndex( demux_t *p_demux,
1107                                    mp4_track_t *p_demux_track )
1108 {
1109     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
1110     MP4_Box_t *p_stsc;
1111
1112     unsigned int i_chunk;
1113     unsigned int i_index, i_last;
1114
1115     if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
1116           !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )||
1117         ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
1118     {
1119         return( VLC_EGENERIC );
1120     }
1121
1122     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
1123     if( !p_demux_track->i_chunk_count )
1124     {
1125         msg_Warn( p_demux, "no chunk defined" );
1126         return( VLC_EGENERIC );
1127     }
1128     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
1129                                    sizeof( mp4_chunk_t ) );
1130     if( p_demux_track->chunk == NULL )
1131     {
1132         return VLC_ENOMEM;
1133     }
1134
1135     /* first we read chunk offset */
1136     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1137     {
1138         mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1139
1140         ck->i_offset = p_co64->data.p_co64->i_chunk_offset[i_chunk];
1141
1142         ck->i_first_dts = 0;
1143         ck->p_sample_count_dts = NULL;
1144         ck->p_sample_delta_dts = NULL;
1145         ck->p_sample_count_pts = NULL;
1146         ck->p_sample_offset_pts = NULL;
1147     }
1148
1149     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
1150         to be used for the sample XXX begin to 1
1151         We construct it begining at the end */
1152     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
1153     i_index = p_stsc->data.p_stsc->i_entry_count;
1154     if( !i_index )
1155     {
1156         msg_Warn( p_demux, "cannot read chunk table or table empty" );
1157         return( VLC_EGENERIC );
1158     }
1159
1160     while( i_index-- )
1161     {
1162         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
1163              i_chunk < i_last; i_chunk++ )
1164         {
1165             if( i_chunk >= p_demux_track->i_chunk_count )
1166             {
1167                 msg_Warn( p_demux, "corrupted chunk table" );
1168                 return VLC_EGENERIC;
1169             }
1170
1171             p_demux_track->chunk[i_chunk].i_sample_description_index =
1172                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
1173             p_demux_track->chunk[i_chunk].i_sample_count =
1174                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
1175         }
1176         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
1177     }
1178
1179     p_demux_track->chunk[0].i_sample_first = 0;
1180     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1181     {
1182         p_demux_track->chunk[i_chunk].i_sample_first =
1183             p_demux_track->chunk[i_chunk-1].i_sample_first +
1184                 p_demux_track->chunk[i_chunk-1].i_sample_count;
1185     }
1186
1187     msg_Dbg( p_demux, "track[Id 0x%x] read %d chunk",
1188              p_demux_track->i_track_ID, p_demux_track->i_chunk_count );
1189
1190     return VLC_SUCCESS;
1191 }
1192
1193 static int TrackCreateSamplesIndex( demux_t *p_demux,
1194                                     mp4_track_t *p_demux_track )
1195 {
1196     MP4_Box_t *p_box;
1197     MP4_Box_data_stsz_t *stsz;
1198     MP4_Box_data_stts_t *stts;
1199     /* TODO use also stss and stsh table for seeking */
1200     /* FIXME use edit table */
1201     int64_t i_sample;
1202     int64_t i_chunk;
1203
1204     int64_t i_index;
1205     int64_t i_index_sample_used;
1206
1207     int64_t i_last_dts;
1208
1209     /* Find stsz
1210      *  Gives the sample size for each samples. There is also a stz2 table
1211      *  (compressed form) that we need to implement TODO */
1212     p_box = MP4_BoxGet( p_demux_track->p_stbl, "stsz" );
1213     if( !p_box )
1214     {
1215         /* FIXME and stz2 */
1216         msg_Warn( p_demux, "cannot find STSZ box" );
1217         return VLC_EGENERIC;
1218     }
1219     stsz = p_box->data.p_stsz;
1220
1221     /* Find stts
1222      *  Gives mapping between sample and decoding time
1223      */
1224     p_box = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
1225     if( !p_box )
1226     {
1227         msg_Warn( p_demux, "cannot find STTS box" );
1228         return VLC_EGENERIC;
1229     }
1230     stts = p_box->data.p_stts;
1231
1232     /* Use stsz table to create a sample number -> sample size table */
1233     p_demux_track->i_sample_count = stsz->i_sample_count;
1234     if( stsz->i_sample_size )
1235     {
1236         /* 1: all sample have the same size, so no need to construct a table */
1237         p_demux_track->i_sample_size = stsz->i_sample_size;
1238         p_demux_track->p_sample_size = NULL;
1239     }
1240     else
1241     {
1242         /* 2: each sample can have a different size */
1243         p_demux_track->i_sample_size = 0;
1244         p_demux_track->p_sample_size =
1245             calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
1246         if( p_demux_track->p_sample_size == NULL )
1247             return VLC_ENOMEM;
1248
1249         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
1250         {
1251             p_demux_track->p_sample_size[i_sample] =
1252                     stsz->i_entry_size[i_sample];
1253         }
1254     }
1255
1256     /* Use stts table to create a sample number -> dts table.
1257      * XXX: if we don't want to waste too much memory, we can't expand
1258      *  the box! so each chunk will contain an "extract" of this table
1259      *  for fast research (problem with raw stream where a sample is sometime
1260      *  just channels*bits_per_sample/8 */
1261
1262     i_last_dts = 0;
1263     i_index = 0; i_index_sample_used = 0;
1264     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1265     {
1266         mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1267         int64_t i_entry, i_sample_count, i;
1268
1269         /* save last dts */
1270         ck->i_first_dts = i_last_dts;
1271
1272         /* count how many entries are needed for this chunk
1273          * for p_sample_delta_dts and p_sample_count_dts */
1274         i_sample_count = ck->i_sample_count;
1275
1276         i_entry = 0;
1277         while( i_sample_count > 0 )
1278         {
1279             i_sample_count -= stts->i_sample_count[i_index+i_entry];
1280             /* don't count already used sample in this entry */
1281             if( i_entry == 0 )
1282                 i_sample_count += i_index_sample_used;
1283
1284             i_entry++;
1285         }
1286
1287         /* allocate them */
1288         ck->p_sample_count_dts = calloc( i_entry, sizeof( uint32_t ) );
1289         ck->p_sample_delta_dts = calloc( i_entry, sizeof( uint32_t ) );
1290
1291         if( !ck->p_sample_count_dts || !ck->p_sample_delta_dts )
1292             return VLC_ENOMEM;
1293
1294         /* now copy */
1295         i_sample_count = ck->i_sample_count;
1296         for( i = 0; i < i_entry; i++ )
1297         {
1298             int64_t i_used;
1299             int64_t i_rest;
1300
1301             i_rest = stts->i_sample_count[i_index] - i_index_sample_used;
1302
1303             i_used = __MIN( i_rest, i_sample_count );
1304
1305             i_index_sample_used += i_used;
1306             i_sample_count -= i_used;
1307
1308             ck->p_sample_count_dts[i] = i_used;
1309             ck->p_sample_delta_dts[i] = stts->i_sample_delta[i_index];
1310
1311             i_last_dts += i_used * ck->p_sample_delta_dts[i];
1312
1313             if( i_index_sample_used >= stts->i_sample_count[i_index] )
1314             {
1315                 i_index++;
1316                 i_index_sample_used = 0;
1317             }
1318         }
1319     }
1320
1321     /* Find ctts
1322      *  Gives the delta between decoding time (dts) and composition table (pts)
1323      */
1324     p_box = MP4_BoxGet( p_demux_track->p_stbl, "ctts" );
1325     if( p_box )
1326     {
1327         MP4_Box_data_ctts_t *ctts = p_box->data.p_ctts;
1328
1329         msg_Warn( p_demux, "CTTS table" );
1330
1331         /* Create pts-dts table per chunk */
1332         i_index = 0; i_index_sample_used = 0;
1333         for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
1334         {
1335             mp4_chunk_t *ck = &p_demux_track->chunk[i_chunk];
1336             int64_t i_entry, i_sample_count, i;
1337
1338             /* count how many entries are needed for this chunk
1339              * for p_sample_delta_dts and p_sample_count_dts */
1340             i_sample_count = ck->i_sample_count;
1341
1342             i_entry = 0;
1343             while( i_sample_count > 0 )
1344             {
1345                 i_sample_count -= ctts->i_sample_count[i_index+i_entry];
1346
1347                 /* don't count already used sample in this entry */
1348                 if( i_entry == 0 )
1349                     i_sample_count += i_index_sample_used;
1350
1351                 i_entry++;
1352             }
1353
1354             /* allocate them */
1355             ck->p_sample_count_pts = calloc( i_entry, sizeof( uint32_t ) );
1356             ck->p_sample_offset_pts = calloc( i_entry, sizeof( int32_t ) );
1357             if( !ck->p_sample_count_pts || !ck->p_sample_offset_pts )
1358                 return VLC_ENOMEM;
1359
1360             /* now copy */
1361             i_sample_count = ck->i_sample_count;
1362             for( i = 0; i < i_entry; i++ )
1363             {
1364                 int64_t i_used;
1365                 int64_t i_rest;
1366
1367                 i_rest = ctts->i_sample_count[i_index] -
1368                     i_index_sample_used;
1369
1370                 i_used = __MIN( i_rest, i_sample_count );
1371
1372                 i_index_sample_used += i_used;
1373                 i_sample_count -= i_used;
1374
1375                 ck->p_sample_count_pts[i] = i_used;
1376                 ck->p_sample_offset_pts[i] = ctts->i_sample_offset[i_index];
1377
1378                 if( i_index_sample_used >= ctts->i_sample_count[i_index] )
1379                 {
1380                     i_index++;
1381                     i_index_sample_used = 0;
1382                 }
1383             }
1384         }
1385     }
1386
1387     msg_Dbg( p_demux, "track[Id 0x%x] read %d samples length:%"PRId64"s",
1388              p_demux_track->i_track_ID, p_demux_track->i_sample_count,
1389              i_last_dts / p_demux_track->i_timescale );
1390
1391     return VLC_SUCCESS;
1392 }
1393
1394 /*
1395  * TrackCreateES:
1396  * Create ES and PES to init decoder if needed, for a track starting at i_chunk
1397  */
1398 static int TrackCreateES( demux_t *p_demux, mp4_track_t *p_track,
1399                           unsigned int i_chunk, es_out_id_t **pp_es )
1400 {
1401     MP4_Box_t   *p_sample;
1402     MP4_Box_t   *p_esds;
1403     MP4_Box_t   *p_box;
1404     MP4_Box_t   *p_frma;
1405
1406     if( pp_es )
1407         *pp_es = NULL;
1408
1409     if( !p_track->chunk[i_chunk].i_sample_description_index )
1410     {
1411         msg_Warn( p_demux, "invalid SampleEntry index (track[Id 0x%x])",
1412                   p_track->i_track_ID );
1413         return VLC_EGENERIC;
1414     }
1415
1416     p_sample = MP4_BoxGet(  p_track->p_stsd, "[%d]",
1417                 p_track->chunk[i_chunk].i_sample_description_index - 1 );
1418
1419     if( !p_sample ||
1420         ( !p_sample->data.p_data && p_track->fmt.i_cat != SPU_ES ) )
1421     {
1422         msg_Warn( p_demux, "cannot find SampleEntry (track[Id 0x%x])",
1423                   p_track->i_track_ID );
1424         return VLC_EGENERIC;
1425     }
1426
1427     p_track->p_sample = p_sample;
1428
1429     if( ( p_frma = MP4_BoxGet( p_track->p_sample, "sinf/frma" ) ) )
1430     {
1431         msg_Warn( p_demux, "Original Format Box: %4.4s", (char *)&p_frma->data.p_frma->i_type );
1432
1433         p_sample->i_type = p_frma->data.p_frma->i_type;
1434     }
1435
1436     if( p_track->fmt.i_cat == AUDIO_ES && ( p_track->i_sample_size == 1 || p_track->i_sample_size == 2 ) )
1437     {
1438         MP4_Box_data_sample_soun_t *p_soun;
1439
1440         p_soun = p_sample->data.p_sample_soun;
1441
1442         if( p_soun->i_qt_version == 0 )
1443         {
1444             switch( p_sample->i_type )
1445             {
1446                 case VLC_FOURCC( 'i', 'm', 'a', '4' ):
1447                     p_soun->i_qt_version = 1;
1448                     p_soun->i_sample_per_packet = 64;
1449                     p_soun->i_bytes_per_packet  = 34;
1450                     p_soun->i_bytes_per_frame   = 34 * p_soun->i_channelcount;
1451                     p_soun->i_bytes_per_sample  = 2;
1452                     break;
1453                 case VLC_FOURCC( 'M', 'A', 'C', '3' ):
1454                     p_soun->i_qt_version = 1;
1455                     p_soun->i_sample_per_packet = 6;
1456                     p_soun->i_bytes_per_packet  = 2;
1457                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1458                     p_soun->i_bytes_per_sample  = 2;
1459                     break;
1460                 case VLC_FOURCC( 'M', 'A', 'C', '6' ):
1461                     p_soun->i_qt_version = 1;
1462                     p_soun->i_sample_per_packet = 12;
1463                     p_soun->i_bytes_per_packet  = 2;
1464                     p_soun->i_bytes_per_frame   = 2 * p_soun->i_channelcount;
1465                     p_soun->i_bytes_per_sample  = 2;
1466                     break;
1467                 case VLC_FOURCC( 'a', 'l', 'a', 'w' ):
1468                 case VLC_FOURCC( 'u', 'l', 'a', 'w' ):
1469                     p_soun->i_samplesize = 8;
1470                     break;
1471                 case VLC_FOURCC( 'N', 'O', 'N', 'E' ):
1472                 case VLC_FOURCC( 'r', 'a', 'w', ' ' ):
1473                 case VLC_FOURCC( 't', 'w', 'o', 's' ):
1474                 case VLC_FOURCC( 's', 'o', 'w', 't' ):
1475                     /* What would be the fun if you could trust the .mov */
1476                     p_track->i_sample_size = ((p_soun->i_samplesize+7)/8) * p_soun->i_channelcount;
1477                     break;
1478                 default:
1479                     break;
1480             }
1481
1482         }
1483         else if( p_soun->i_qt_version == 1 && p_soun->i_sample_per_packet <= 0 )
1484         {
1485             p_soun->i_qt_version = 0;
1486         }
1487     }
1488
1489     /* It's a little ugly but .. there are special cases */
1490     switch( p_sample->i_type )
1491     {
1492         case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
1493         case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
1494         {
1495             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1496             p_track->fmt.i_codec = VLC_FOURCC( 'm', 'p', 'g', 'a' );
1497             if( p_track->i_sample_size > 1 )
1498                 p_soun->i_qt_version = 0;
1499             break;
1500         }
1501
1502         case( VLC_FOURCC( 'r', 'a', 'w', ' ' ) ):
1503         case( VLC_FOURCC( 'N', 'O', 'N', 'E' ) ):
1504         {
1505             MP4_Box_data_sample_soun_t *p_soun = p_sample->data.p_sample_soun;
1506
1507             if(p_soun && (p_soun->i_samplesize+7)/8 == 1 )
1508                 p_track->fmt.i_codec = VLC_FOURCC( 'u', '8', ' ', ' ' );
1509             else
1510                 p_track->fmt.i_codec = VLC_FOURCC( 't', 'w', 'o', 's' );
1511
1512             /* Buggy files workaround */
1513             if( p_sample->data.p_sample_soun && (p_track->i_timescale !=
1514                 p_sample->data.p_sample_soun->i_sampleratehi) )
1515             {
1516                 MP4_Box_data_sample_soun_t *p_soun =
1517                     p_sample->data.p_sample_soun;
1518
1519                 msg_Warn( p_demux, "i_timescale (%"PRIu64") != i_sampleratehi "
1520                           "(%u), making both equal (report any problem).",
1521                           p_track->i_timescale, p_soun->i_sampleratehi );
1522
1523                 if( p_soun->i_sampleratehi )
1524                     p_track->i_timescale = p_soun->i_sampleratehi;
1525                 else
1526                     p_soun->i_sampleratehi = p_track->i_timescale;
1527             }
1528             break;
1529         }
1530
1531         case( VLC_FOURCC( 's', '2', '6', '3' ) ):
1532             p_track->fmt.i_codec = VLC_FOURCC( 'h', '2', '6', '3' );
1533             break;
1534
1535         case( VLC_FOURCC( 't', 'e', 'x', 't' ) ):
1536         case( VLC_FOURCC( 't', 'x', '3', 'g' ) ):
1537             p_track->fmt.i_codec = VLC_FOURCC( 's', 'u', 'b', 't' );
1538             /* FIXME: Not true, could be UTF-16 with a Byte Order Mark (0xfeff) */
1539             /* FIXME UTF-8 doesn't work here ? */
1540             if( p_track->b_mac_encoding )
1541                 p_track->fmt.subs.psz_encoding = strdup( "MAC" );
1542             else
1543                 p_track->fmt.subs.psz_encoding = strdup( "UTF-8" );
1544             break;
1545
1546         case VLC_FOURCC('y','v','1','2'):
1547             p_track->fmt.i_codec = VLC_FOURCC('Y','V','1','2');
1548             break;
1549         case VLC_FOURCC('y','u','v','2'):
1550             p_track->fmt.i_codec = VLC_FOURCC('Y','U','Y','2');
1551             break;
1552
1553         case VLC_FOURCC('i','n','2','4'):
1554             /* in in24/in32 there's enda-atom to tell it's little-endian (if present) */
1555             if( ( MP4_BoxGet( p_sample, "wave/enda" ) ) ||
1556                 ( MP4_BoxGet( p_sample, "enda" ) ) )
1557             {
1558                 p_track->fmt.i_codec = VLC_FOURCC('4','2','n','i');
1559             } else {
1560                 p_track->fmt.i_codec = p_sample->i_type;
1561             }
1562             break;
1563
1564         default:
1565             p_track->fmt.i_codec = p_sample->i_type;
1566             break;
1567     }
1568
1569     /* now see if esds is present and if so create a data packet
1570         with decoder_specific_info  */
1571 #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
1572     if( ( ( p_esds = MP4_BoxGet( p_sample, "esds" ) ) ||
1573           ( p_esds = MP4_BoxGet( p_sample, "wave/esds" ) ) )&&
1574         ( p_esds->data.p_esds )&&
1575         ( p_decconfig ) )
1576     {
1577         /* First update information based on i_objectTypeIndication */
1578         switch( p_decconfig->i_objectTypeIndication )
1579         {
1580             case( 0x20 ): /* MPEG4 VIDEO */
1581                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','v' );
1582                 break;
1583             case( 0x40):
1584                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1585                 break;
1586             case( 0x60):
1587             case( 0x61):
1588             case( 0x62):
1589             case( 0x63):
1590             case( 0x64):
1591             case( 0x65): /* MPEG2 video */
1592                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1593                 break;
1594             /* Theses are MPEG2-AAC */
1595             case( 0x66): /* main profile */
1596             case( 0x67): /* Low complexity profile */
1597             case( 0x68): /* Scaleable Sampling rate profile */
1598                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','4','a' );
1599                 break;
1600             /* true MPEG 2 audio */
1601             case( 0x69):
1602                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1603                 break;
1604             case( 0x6a): /* MPEG1 video */
1605                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1606                 break;
1607             case( 0x6b): /* MPEG1 audio */
1608                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','a' );
1609                 break;
1610             case( 0x6c ): /* jpeg */
1611                 p_track->fmt.i_codec = VLC_FOURCC( 'j','p','e','g' );
1612                 break;
1613             case( 0x6d ): /* png */
1614                 p_track->fmt.i_codec = VLC_FOURCC( 'p','n','g',' ' );
1615                 break;
1616             case( 0x6e ): /* jpeg200 */
1617                 p_track->fmt.i_codec = VLC_FOURCC( 'M','J','2','C' );
1618                 break;
1619             case( 0xa3 ): /* vc1 */
1620                 p_track->fmt.i_codec = VLC_FOURCC( 'W','V','C','1' );
1621                 break;
1622
1623             /* Private ID */
1624             case( 0xe0 ): /* NeroDigital: dvd subs */
1625                 if( p_track->fmt.i_cat == SPU_ES )
1626                 {
1627                     p_track->fmt.i_codec = VLC_FOURCC( 's','p','u',' ' );
1628                     if( p_track->i_width > 0 )
1629                         p_track->fmt.subs.spu.i_original_frame_width = p_track->i_width;
1630                     if( p_track->i_height > 0 )
1631                         p_track->fmt.subs.spu.i_original_frame_height = p_track->i_height;
1632                     break;
1633                 }
1634             case( 0xe1 ): /* QCelp for 3gp */
1635                 if( p_track->fmt.i_cat == AUDIO_ES )
1636                 {
1637                     p_track->fmt.i_codec = VLC_FOURCC( 'Q','c','l','p' );
1638                 }
1639                 break;
1640
1641             /* Fallback */
1642             default:
1643                 /* Unknown entry, but don't touch i_fourcc */
1644                 msg_Warn( p_demux,
1645                           "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])",
1646                           p_decconfig->i_objectTypeIndication,
1647                           p_track->i_track_ID );
1648                 break;
1649         }
1650         p_track->fmt.i_extra = p_decconfig->i_decoder_specific_info_len;
1651         if( p_track->fmt.i_extra > 0 )
1652         {
1653             p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1654             memcpy( p_track->fmt.p_extra, p_decconfig->p_decoder_specific_info,
1655                     p_track->fmt.i_extra );
1656         }
1657     }
1658     else
1659     {
1660         switch( p_sample->i_type )
1661         {
1662             /* qt decoder, send the complete chunk */
1663             case VLC_FOURCC ('h', 'd', 'v', '1'): // HDV 720p30
1664             case VLC_FOURCC ('h', 'd', 'v', '2'): // HDV 1080i60
1665             case VLC_FOURCC ('h', 'd', 'v', '3'): // HDV 1080i50
1666             case VLC_FOURCC ('h', 'd', 'v', '5'): // HDV 720p25
1667             case VLC_FOURCC ('m', 'x', '5', 'n'): // MPEG2 IMX NTSC 525/60 50mb/s produced by FCP
1668             case VLC_FOURCC ('m', 'x', '5', 'p'): // MPEG2 IMX PAL 625/60 50mb/s produced by FCP
1669             case VLC_FOURCC ('m', 'x', '4', 'n'): // MPEG2 IMX NTSC 525/60 40mb/s produced by FCP
1670             case VLC_FOURCC ('m', 'x', '4', 'p'): // MPEG2 IMX PAL 625/60 40mb/s produced by FCP
1671             case VLC_FOURCC ('m', 'x', '3', 'n'): // MPEG2 IMX NTSC 525/60 30mb/s produced by FCP
1672             case VLC_FOURCC ('m', 'x', '3', 'p'): // MPEG2 IMX PAL 625/50 30mb/s produced by FCP
1673             case VLC_FOURCC ('x', 'd', 'v', '2'): // XDCAM HD 1080i60
1674             case VLC_FOURCC ('A', 'V', 'm', 'p'): // AVID IMX PAL
1675                 p_track->fmt.i_codec = VLC_FOURCC( 'm','p','g','v' );
1676                 break;
1677             /* qt decoder, send the complete chunk */
1678             case VLC_FOURCC( 'S', 'V', 'Q', '3' ):
1679             case VLC_FOURCC( 'S', 'V', 'Q', '1' ):
1680             case VLC_FOURCC( 'V', 'P', '3', '1' ):
1681             case VLC_FOURCC( '3', 'I', 'V', '1' ):
1682             case VLC_FOURCC( 'Z', 'y', 'G', 'o' ):
1683                 p_track->fmt.i_extra =
1684                     p_sample->data.p_sample_vide->i_qt_image_description;
1685                 if( p_track->fmt.i_extra > 0 )
1686                 {
1687                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1688                     memcpy( p_track->fmt.p_extra,
1689                             p_sample->data.p_sample_vide->p_qt_image_description,
1690                             p_track->fmt.i_extra);
1691                 }
1692                 break;
1693             case VLC_FOURCC( 'Q', 'D', 'M', 'C' ):
1694             case VLC_FOURCC( 'Q', 'D', 'M', '2' ):
1695             case VLC_FOURCC( 's', 'a', 'm', 'r' ):
1696             case VLC_FOURCC( 'a', 'l', 'a', 'c' ):
1697                 p_track->fmt.i_extra =
1698                     p_sample->data.p_sample_soun->i_qt_description;
1699                 if( p_track->fmt.i_extra > 0 )
1700                 {
1701                     p_track->fmt.p_extra = malloc( p_track->fmt.i_extra );
1702                     memcpy( p_track->fmt.p_extra,
1703                             p_sample->data.p_sample_soun->p_qt_description,
1704                             p_track->fmt.i_extra);
1705                 }
1706                 break;
1707
1708             /* avc1: send avcC (h264 without annexe B, ie without start code)*/
1709             case VLC_FOURCC( 'a', 'v', 'c', '1' ):
1710             {
1711                 MP4_Box_t *p_avcC = MP4_BoxGet( p_sample, "avcC" );
1712
1713                 if( p_avcC )
1714                 {
1715                     p_track->fmt.i_extra = p_avcC->data.p_avcC->i_avcC;
1716                     if( p_track->fmt.i_extra > 0 )
1717                     {
1718                         p_track->fmt.p_extra = malloc( p_avcC->data.p_avcC->i_avcC );
1719                         memcpy( p_track->fmt.p_extra, p_avcC->data.p_avcC->p_avcC,
1720                                 p_track->fmt.i_extra );
1721                     }
1722                 }
1723                 else
1724                 {
1725                     msg_Err( p_demux, "missing avcC" );
1726                 }
1727                 break;
1728             }
1729
1730             case VLC_FOURCC('m','s',0x00,0x02):
1731             case VLC_FOURCC('m','s',0x00,0x11):
1732             case VLC_FOURCC('Q','c','l','p'):
1733                 p_track->fmt.audio.i_blockalign = p_sample->data.p_sample_soun->i_bytes_per_frame;
1734                 break;
1735
1736             default:
1737                 break;
1738         }
1739     }
1740
1741 #undef p_decconfig
1742
1743     /* some last initialisation */
1744     switch( p_track->fmt.i_cat )
1745     {
1746     case VIDEO_ES:
1747         p_track->fmt.video.i_width = p_sample->data.p_sample_vide->i_width;
1748         p_track->fmt.video.i_height = p_sample->data.p_sample_vide->i_height;
1749         p_track->fmt.video.i_bits_per_pixel =
1750             p_sample->data.p_sample_vide->i_depth;
1751
1752         /* fall on display size */
1753         if( p_track->fmt.video.i_width <= 0 )
1754             p_track->fmt.video.i_width = p_track->i_width;
1755         if( p_track->fmt.video.i_height <= 0 )
1756             p_track->fmt.video.i_height = p_track->i_height;
1757
1758         /* Find out apect ratio from display size */
1759         if( p_track->i_width > 0 && p_track->i_height > 0 &&
1760             /* Work-around buggy muxed files */
1761             p_sample->data.p_sample_vide->i_width != p_track->i_width )
1762             p_track->fmt.video.i_aspect =
1763                 VOUT_ASPECT_FACTOR * p_track->i_width / p_track->i_height;
1764
1765         /* Support for cropping (eg. in H263 files) */
1766         p_track->fmt.video.i_visible_width = p_track->fmt.video.i_width;
1767         p_track->fmt.video.i_visible_height = p_track->fmt.video.i_height;
1768
1769         /* Frame rate */
1770         p_track->fmt.video.i_frame_rate = p_track->i_timescale;
1771         p_track->fmt.video.i_frame_rate_base = 1;
1772
1773         if( p_track->fmt.video.i_frame_rate &&
1774             (p_box = MP4_BoxGet( p_track->p_stbl, "stts" )) &&
1775             p_box->data.p_stts->i_entry_count >= 1 )
1776         {
1777             p_track->fmt.video.i_frame_rate_base =
1778                 p_box->data.p_stts->i_sample_delta[0];
1779         }
1780
1781         break;
1782
1783     case AUDIO_ES:
1784         p_track->fmt.audio.i_channels =
1785             p_sample->data.p_sample_soun->i_channelcount;
1786         p_track->fmt.audio.i_rate =
1787             p_sample->data.p_sample_soun->i_sampleratehi;
1788         p_track->fmt.i_bitrate = p_sample->data.p_sample_soun->i_channelcount *
1789             p_sample->data.p_sample_soun->i_sampleratehi *
1790                 p_sample->data.p_sample_soun->i_samplesize;
1791         p_track->fmt.audio.i_bitspersample =
1792             p_sample->data.p_sample_soun->i_samplesize;
1793
1794         if( p_track->i_sample_size != 0 &&
1795             p_sample->data.p_sample_soun->i_qt_version == 1 && p_sample->data.p_sample_soun->i_sample_per_packet <= 0 )
1796         {
1797             msg_Err( p_demux, "Invalid sample per packet value for qt_version 1" );
1798             return VLC_EGENERIC;
1799         }
1800         break;
1801
1802     default:
1803         break;
1804     }
1805
1806     if( pp_es )
1807         *pp_es = es_out_Add( p_demux->out, &p_track->fmt );
1808
1809     return VLC_SUCCESS;
1810 }
1811
1812 /* given a time it return sample/chunk
1813  * it also update elst field of the track
1814  */
1815 static int TrackTimeToSampleChunk( demux_t *p_demux, mp4_track_t *p_track,
1816                                    int64_t i_start, uint32_t *pi_chunk,
1817                                    uint32_t *pi_sample )
1818 {
1819     demux_sys_t *p_sys = p_demux->p_sys;
1820     MP4_Box_t   *p_stss;
1821     uint64_t     i_dts;
1822     unsigned int i_sample;
1823     unsigned int i_chunk;
1824     int          i_index;
1825
1826     /* FIXME see if it's needed to check p_track->i_chunk_count */
1827     if( p_track->i_chunk_count == 0 )
1828         return( VLC_EGENERIC );
1829
1830     /* handle elst (find the correct one) */
1831     MP4_TrackSetELST( p_demux, p_track, i_start );
1832     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
1833     {
1834         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
1835         int64_t i_mvt= i_start * p_sys->i_timescale / (int64_t)1000000;
1836
1837         /* now calculate i_start for this elst */
1838         /* offset */
1839         i_start -= p_track->i_elst_time * INT64_C(1000000) / p_sys->i_timescale;
1840         if( i_start < 0 )
1841         {
1842             *pi_chunk = 0;
1843             *pi_sample= 0;
1844
1845             return VLC_SUCCESS;
1846         }
1847         /* to track time scale */
1848         i_start  = i_start * p_track->i_timescale / (int64_t)1000000;
1849         /* add elst offset */
1850         if( ( elst->i_media_rate_integer[p_track->i_elst] > 0 ||
1851              elst->i_media_rate_fraction[p_track->i_elst] > 0 ) &&
1852             elst->i_media_time[p_track->i_elst] > 0 )
1853         {
1854             i_start += elst->i_media_time[p_track->i_elst];
1855         }
1856
1857         msg_Dbg( p_demux, "elst (%d) gives %"PRId64"ms (movie)-> %"PRId64
1858                  "ms (track)", p_track->i_elst,
1859                  i_mvt * 1000 / p_sys->i_timescale,
1860                  i_start * 1000 / p_track->i_timescale );
1861     }
1862     else
1863     {
1864         /* convert absolute time to in timescale unit */
1865         i_start = i_start * p_track->i_timescale / (int64_t)1000000;
1866     }
1867
1868     /* we start from sample 0/chunk 0, hope it won't take too much time */
1869     /* *** find good chunk *** */
1870     for( i_chunk = 0; ; i_chunk++ )
1871     {
1872         if( i_chunk + 1 >= p_track->i_chunk_count )
1873         {
1874             /* at the end and can't check if i_start in this chunk,
1875                it will be check while searching i_sample */
1876             i_chunk = p_track->i_chunk_count - 1;
1877             break;
1878         }
1879
1880         if( (uint64_t)i_start >= p_track->chunk[i_chunk].i_first_dts &&
1881             (uint64_t)i_start <  p_track->chunk[i_chunk + 1].i_first_dts )
1882         {
1883             break;
1884         }
1885     }
1886
1887     /* *** find sample in the chunk *** */
1888     i_sample = p_track->chunk[i_chunk].i_sample_first;
1889     i_dts    = p_track->chunk[i_chunk].i_first_dts;
1890     for( i_index = 0; i_sample < p_track->chunk[i_chunk].i_sample_count; )
1891     {
1892         if( i_dts +
1893             p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1894             p_track->chunk[i_chunk].p_sample_delta_dts[i_index] < (uint64_t)i_start )
1895         {
1896             i_dts    +=
1897                 p_track->chunk[i_chunk].p_sample_count_dts[i_index] *
1898                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1899
1900             i_sample += p_track->chunk[i_chunk].p_sample_count_dts[i_index];
1901             i_index++;
1902         }
1903         else
1904         {
1905             if( p_track->chunk[i_chunk].p_sample_delta_dts[i_index] <= 0 )
1906             {
1907                 break;
1908             }
1909             i_sample += ( i_start - i_dts ) /
1910                 p_track->chunk[i_chunk].p_sample_delta_dts[i_index];
1911             break;
1912         }
1913     }
1914
1915     if( i_sample >= p_track->i_sample_count )
1916     {
1917         msg_Warn( p_demux, "track[Id 0x%x] will be disabled "
1918                   "(seeking too far) chunk=%d sample=%d",
1919                   p_track->i_track_ID, i_chunk, i_sample );
1920         return( VLC_EGENERIC );
1921     }
1922
1923
1924     /* *** Try to find nearest sync points *** */
1925     if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
1926     {
1927         unsigned int i_index;
1928         msg_Dbg( p_demux,
1929                     "track[Id 0x%x] using Sync Sample Box (stss)",
1930                     p_track->i_track_ID );
1931         for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
1932         {
1933             if( p_stss->data.p_stss->i_sample_number[i_index] >= i_sample )
1934             {
1935                 if( i_index > 0 )
1936                 {
1937                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1938                             i_sample,
1939                             p_stss->data.p_stss->i_sample_number[i_index-1] );
1940                     i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
1941                     /* new i_sample is less than old so i_chunk can only decreased */
1942                     while( i_chunk > 0 &&
1943                             i_sample < p_track->chunk[i_chunk].i_sample_first )
1944                     {
1945                         i_chunk--;
1946                     }
1947                 }
1948                 else
1949                 {
1950                     msg_Dbg( p_demux, "stts gives %d --> %d (sample number)",
1951                             i_sample,
1952                             p_stss->data.p_stss->i_sample_number[i_index] );
1953                     i_sample = p_stss->data.p_stss->i_sample_number[i_index];
1954                     /* new i_sample is more than old so i_chunk can only increased */
1955                     while( i_chunk < p_track->i_chunk_count - 1 &&
1956                            i_sample >= p_track->chunk[i_chunk].i_sample_first +
1957                              p_track->chunk[i_chunk].i_sample_count )
1958                     {
1959                         i_chunk++;
1960                     }
1961                 }
1962                 break;
1963             }
1964         }
1965     }
1966     else
1967     {
1968         msg_Dbg( p_demux, "track[Id 0x%x] does not provide Sync "
1969                  "Sample Box (stss)", p_track->i_track_ID );
1970     }
1971
1972     *pi_chunk  = i_chunk;
1973     *pi_sample = i_sample;
1974
1975     return VLC_SUCCESS;
1976 }
1977
1978 static int TrackGotoChunkSample( demux_t *p_demux, mp4_track_t *p_track,
1979                                  unsigned int i_chunk, unsigned int i_sample )
1980 {
1981     bool b_reselect = false;
1982
1983     /* now see if actual es is ok */
1984     if( p_track->i_chunk >= p_track->i_chunk_count ||
1985         p_track->chunk[p_track->i_chunk].i_sample_description_index !=
1986             p_track->chunk[i_chunk].i_sample_description_index )
1987     {
1988         msg_Warn( p_demux, "recreate ES for track[Id 0x%x]",
1989                   p_track->i_track_ID );
1990
1991         es_out_Control( p_demux->out, ES_OUT_GET_ES_STATE,
1992                         p_track->p_es, &b_reselect );
1993
1994         es_out_Del( p_demux->out, p_track->p_es );
1995
1996         p_track->p_es = NULL;
1997
1998         if( TrackCreateES( p_demux, p_track, i_chunk, &p_track->p_es ) )
1999         {
2000             msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
2001                      p_track->i_track_ID );
2002
2003             p_track->b_ok       = false;
2004             p_track->b_selected = false;
2005             return VLC_EGENERIC;
2006         }
2007     }
2008
2009     /* select again the new decoder */
2010     if( b_reselect )
2011     {
2012         es_out_Control( p_demux->out, ES_OUT_SET_ES, p_track->p_es );
2013     }
2014
2015     p_track->i_chunk    = i_chunk;
2016     p_track->i_sample   = i_sample;
2017
2018     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
2019 }
2020
2021 /****************************************************************************
2022  * MP4_TrackCreate:
2023  ****************************************************************************
2024  * Parse track information and create all needed data to run a track
2025  * If it succeed b_ok is set to 1 else to 0
2026  ****************************************************************************/
2027 static void MP4_TrackCreate( demux_t *p_demux, mp4_track_t *p_track,
2028                              MP4_Box_t *p_box_trak,
2029                              bool b_force_enable )
2030 {
2031     demux_sys_t *p_sys = p_demux->p_sys;
2032
2033     MP4_Box_t *p_tkhd = MP4_BoxGet( p_box_trak, "tkhd" );
2034     MP4_Box_t *p_tref = MP4_BoxGet( p_box_trak, "tref" );
2035     MP4_Box_t *p_elst;
2036
2037     MP4_Box_t *p_mdhd;
2038     MP4_Box_t *p_udta;
2039     MP4_Box_t *p_hdlr;
2040
2041     MP4_Box_t *p_vmhd;
2042     MP4_Box_t *p_smhd;
2043
2044     MP4_Box_t *p_drms;
2045
2046     unsigned int i;
2047     char language[4];
2048
2049     /* hint track unsupported */
2050
2051     /* set default value (-> track unusable) */
2052     p_track->b_ok       = false;
2053     p_track->b_enable   = false;
2054     p_track->b_selected = false;
2055     p_track->b_chapter  = false;
2056     p_track->b_mac_encoding = false;
2057
2058     es_format_Init( &p_track->fmt, UNKNOWN_ES, 0 );
2059
2060     if( !p_tkhd )
2061     {
2062         return;
2063     }
2064
2065     /* do we launch this track by default ? */
2066     p_track->b_enable =
2067         ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
2068     if( !p_track->b_enable )
2069         p_track->fmt.i_priority = -1;
2070
2071     p_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
2072     p_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
2073     p_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
2074
2075     if( p_tref )
2076     {
2077 /*        msg_Warn( p_demux, "unhandled box: tref --> FIXME" ); */
2078     }
2079
2080     p_mdhd = MP4_BoxGet( p_box_trak, "mdia/mdhd" );
2081     p_hdlr = MP4_BoxGet( p_box_trak, "mdia/hdlr" );
2082
2083     if( ( !p_mdhd )||( !p_hdlr ) )
2084     {
2085         return;
2086     }
2087
2088     p_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
2089     if( !p_track->i_timescale )
2090         return;
2091
2092     if( p_mdhd->data.p_mdhd->i_language_code < 0x800 )
2093     {
2094         /* We can convert i_language_code into iso 639 code,
2095          * I won't */
2096         strcpy( language, MP4_ConvertMacCode( p_mdhd->data.p_mdhd->i_language_code ) );
2097         p_track->b_mac_encoding = true;
2098     }
2099     else
2100     {
2101         for( i = 0; i < 3; i++ )
2102             language[i] = p_mdhd->data.p_mdhd->i_language[i];
2103         language[3] = '\0';
2104     }
2105
2106     switch( p_hdlr->data.p_hdlr->i_handler_type )
2107     {
2108         case( FOURCC_soun ):
2109             if( !( p_smhd = MP4_BoxGet( p_box_trak, "mdia/minf/smhd" ) ) )
2110             {
2111                 return;
2112             }
2113             p_track->fmt.i_cat = AUDIO_ES;
2114             break;
2115
2116         case( FOURCC_vide ):
2117             if( !( p_vmhd = MP4_BoxGet( p_box_trak, "mdia/minf/vmhd" ) ) )
2118             {
2119                 return;
2120             }
2121             p_track->fmt.i_cat = VIDEO_ES;
2122             break;
2123
2124         case( FOURCC_text ):
2125         case( FOURCC_subp ):
2126         case( FOURCC_tx3g ):
2127         case( FOURCC_sbtl ):
2128             p_track->fmt.i_cat = SPU_ES;
2129             break;
2130
2131         default:
2132             return;
2133     }
2134
2135     p_track->i_elst = 0;
2136     p_track->i_elst_time = 0;
2137     if( ( p_track->p_elst = p_elst = MP4_BoxGet( p_box_trak, "edts/elst" ) ) )
2138     {
2139         MP4_Box_data_elst_t *elst = p_elst->data.p_elst;
2140         unsigned int i;
2141
2142         msg_Warn( p_demux, "elst box found" );
2143         for( i = 0; i < elst->i_entry_count; i++ )
2144         {
2145             msg_Dbg( p_demux, "   - [%d] duration=%"PRId64"ms media time=%"PRId64
2146                      "ms) rate=%d.%d", i,
2147                      elst->i_segment_duration[i] * 1000 / p_sys->i_timescale,
2148                      elst->i_media_time[i] >= 0 ?
2149                      (int64_t)(elst->i_media_time[i] * 1000 / p_track->i_timescale) :
2150                      INT64_C(-1),
2151                      elst->i_media_rate_integer[i],
2152                      elst->i_media_rate_fraction[i] );
2153         }
2154     }
2155
2156
2157 /*  TODO
2158     add support for:
2159     p_dinf = MP4_BoxGet( p_minf, "dinf" );
2160 */
2161     if( !( p_track->p_stbl = MP4_BoxGet( p_box_trak,"mdia/minf/stbl" ) ) ||
2162         !( p_track->p_stsd = MP4_BoxGet( p_box_trak,"mdia/minf/stbl/stsd") ) )
2163     {
2164         return;
2165     }
2166
2167     p_drms = MP4_BoxGet( p_track->p_stsd, "drms" );
2168     p_track->b_drms = p_drms != NULL;
2169     p_track->p_drms = p_track->b_drms ?
2170         p_drms->data.p_sample_soun->p_drms : NULL;
2171
2172     if ( !p_drms )
2173     {
2174         p_drms = MP4_BoxGet( p_track->p_stsd, "drmi" );
2175         p_track->b_drms = p_drms != NULL;
2176         p_track->p_drms = p_track->b_drms ?
2177             p_drms->data.p_sample_vide->p_drms : NULL;
2178     }
2179
2180     if( p_drms )
2181         p_track->p_skcr = MP4_BoxGet( p_drms, "sinf/skcr" );
2182
2183     /* Set language */
2184     if( *language && strcmp( language, "```" ) && strcmp( language, "und" ) )
2185     {
2186         p_track->fmt.psz_language = strdup( language );
2187     }
2188
2189     p_udta = MP4_BoxGet( p_box_trak, "udta" );
2190     if( p_udta )
2191     {
2192         MP4_Box_t *p_0xa9xxx;
2193         for( p_0xa9xxx = p_udta->p_first; p_0xa9xxx != NULL;
2194                  p_0xa9xxx = p_0xa9xxx->p_next )
2195         {
2196             switch( p_0xa9xxx->i_type )
2197             {
2198                 case FOURCC_0xa9nam:
2199                     p_track->fmt.psz_description =
2200                         strdup( p_0xa9xxx->data.p_0xa9xxx->psz_text );
2201                     break;
2202             }
2203         }
2204     }
2205
2206     /* Create chunk index table and sample index table */
2207     if( TrackCreateChunksIndex( p_demux,p_track  ) ||
2208         TrackCreateSamplesIndex( p_demux, p_track ) )
2209     {
2210         return; /* cannot create chunks index */
2211     }
2212
2213     p_track->i_chunk  = 0;
2214     p_track->i_sample = 0;
2215
2216     /* Mark chapter only track */
2217     if( p_sys->p_tref_chap )
2218     {
2219         MP4_Box_data_tref_generic_t *p_chap = p_sys->p_tref_chap->data.p_tref_generic;
2220         unsigned int i;
2221
2222         for( i = 0; i < p_chap->i_entry_count; i++ )
2223         {
2224             if( p_track->i_track_ID == p_chap->i_track_ID[i] )
2225             {
2226                 p_track->b_chapter = true;
2227                 p_track->b_enable = false;
2228                 break;
2229             }
2230         }
2231     }
2232
2233     /* now create es */
2234     if( b_force_enable &&
2235         ( p_track->fmt.i_cat == VIDEO_ES || p_track->fmt.i_cat == AUDIO_ES ) )
2236     {
2237         msg_Warn( p_demux, "Enabling track[Id 0x%x] (buggy file without enabled track)",
2238                   p_track->i_track_ID );
2239         p_track->b_enable = true;
2240         p_track->fmt.i_priority = 0;
2241     }
2242
2243     p_track->p_es = NULL;
2244     if( TrackCreateES( p_demux,
2245                        p_track, p_track->i_chunk,
2246                        p_track->b_chapter ? NULL : &p_track->p_es ) )
2247     {
2248         msg_Err( p_demux, "cannot create es for track[Id 0x%x]",
2249                  p_track->i_track_ID );
2250         return;
2251     }
2252     p_track->b_ok = true;
2253 #if 0
2254     {
2255         int i;
2256         for( i = 0; i < p_track->i_chunk_count; i++ )
2257         {
2258             fprintf( stderr, "%-5d sample_count=%d pts=%lld\n",
2259                      i, p_track->chunk[i].i_sample_count,
2260                      p_track->chunk[i].i_first_dts );
2261
2262         }
2263     }
2264 #endif
2265 }
2266
2267 /****************************************************************************
2268  * MP4_TrackDestroy:
2269  ****************************************************************************
2270  * Destroy a track created by MP4_TrackCreate.
2271  ****************************************************************************/
2272 static void MP4_TrackDestroy( mp4_track_t *p_track )
2273 {
2274     unsigned int i_chunk;
2275
2276     p_track->b_ok = false;
2277     p_track->b_enable   = false;
2278     p_track->b_selected = false;
2279
2280     es_format_Clean( &p_track->fmt );
2281
2282     for( i_chunk = 0; i_chunk < p_track->i_chunk_count; i_chunk++ )
2283     {
2284         if( p_track->chunk )
2285         {
2286            FREENULL(p_track->chunk[i_chunk].p_sample_count_dts);
2287            FREENULL(p_track->chunk[i_chunk].p_sample_delta_dts );
2288
2289            FREENULL(p_track->chunk[i_chunk].p_sample_count_pts);
2290            FREENULL(p_track->chunk[i_chunk].p_sample_offset_pts );
2291         }
2292     }
2293     FREENULL( p_track->chunk );
2294
2295     if( !p_track->i_sample_size )
2296     {
2297         FREENULL( p_track->p_sample_size );
2298     }
2299 }
2300
2301 static int MP4_TrackSelect( demux_t *p_demux, mp4_track_t *p_track,
2302                             mtime_t i_start )
2303 {
2304     if( !p_track->b_ok || p_track->b_chapter )
2305     {
2306         return VLC_EGENERIC;
2307     }
2308
2309     if( p_track->b_selected )
2310     {
2311         msg_Warn( p_demux, "track[Id 0x%x] already selected",
2312                   p_track->i_track_ID );
2313         return VLC_SUCCESS;
2314     }
2315
2316     return MP4_TrackSeek( p_demux, p_track, i_start );
2317 }
2318
2319 static void MP4_TrackUnselect( demux_t *p_demux, mp4_track_t *p_track )
2320 {
2321     if( !p_track->b_ok || p_track->b_chapter )
2322     {
2323         return;
2324     }
2325
2326     if( !p_track->b_selected )
2327     {
2328         msg_Warn( p_demux, "track[Id 0x%x] already unselected",
2329                   p_track->i_track_ID );
2330         return;
2331     }
2332     if( p_track->p_es )
2333     {
2334         es_out_Control( p_demux->out, ES_OUT_SET_ES_STATE,
2335                         p_track->p_es, false );
2336     }
2337
2338     p_track->b_selected = false;
2339 }
2340
2341 static int MP4_TrackSeek( demux_t *p_demux, mp4_track_t *p_track,
2342                           mtime_t i_start )
2343 {
2344     uint32_t i_chunk;
2345     uint32_t i_sample;
2346
2347     if( !p_track->b_ok || p_track->b_chapter )
2348         return VLC_EGENERIC;
2349
2350     p_track->b_selected = false;
2351
2352     if( TrackTimeToSampleChunk( p_demux, p_track, i_start,
2353                                 &i_chunk, &i_sample ) )
2354     {
2355         msg_Warn( p_demux, "cannot select track[Id 0x%x]",
2356                   p_track->i_track_ID );
2357         return VLC_EGENERIC;
2358     }
2359
2360     p_track->b_selected = true;
2361
2362     if( !TrackGotoChunkSample( p_demux, p_track, i_chunk, i_sample ) )
2363         p_track->b_selected = true;
2364
2365     return p_track->b_selected ? VLC_SUCCESS : VLC_EGENERIC;
2366 }
2367
2368
2369 /*
2370  * 3 types: for audio
2371  *
2372  */
2373 #define QT_V0_MAX_SAMPLES 1024
2374 static int MP4_TrackSampleSize( mp4_track_t *p_track )
2375 {
2376     int i_size;
2377     MP4_Box_data_sample_soun_t *p_soun;
2378
2379     if( p_track->i_sample_size == 0 )
2380     {
2381         /* most simple case */
2382         return p_track->p_sample_size[p_track->i_sample];
2383     }
2384     if( p_track->fmt.i_cat != AUDIO_ES )
2385     {
2386         return p_track->i_sample_size;
2387     }
2388
2389     p_soun = p_track->p_sample->data.p_sample_soun;
2390
2391     if( p_soun->i_qt_version == 1 )
2392     {
2393         int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count;
2394         if( p_track->fmt.audio.i_blockalign > 1 )
2395             i_samples = p_soun->i_sample_per_packet;
2396
2397         i_size = i_samples / p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
2398     }
2399     else if( p_track->i_sample_size > 256 )
2400     {
2401         /* We do that so we don't read too much data
2402          * (in this case we are likely dealing with compressed data) */
2403         i_size = p_track->i_sample_size;
2404     }
2405     else
2406     {
2407         /* Read a bunch of samples at once */
2408         int i_samples = p_track->chunk[p_track->i_chunk].i_sample_count -
2409             ( p_track->i_sample -
2410               p_track->chunk[p_track->i_chunk].i_sample_first );
2411
2412         i_samples = __MIN( QT_V0_MAX_SAMPLES, i_samples );
2413         i_size = i_samples * p_track->i_sample_size;
2414     }
2415
2416     //fprintf( stderr, "size=%d\n", i_size );
2417     return i_size;
2418 }
2419
2420 static uint64_t MP4_TrackGetPos( mp4_track_t *p_track )
2421 {
2422     unsigned int i_sample;
2423     uint64_t i_pos;
2424
2425     i_pos = p_track->chunk[p_track->i_chunk].i_offset;
2426
2427     if( p_track->i_sample_size )
2428     {
2429         MP4_Box_data_sample_soun_t *p_soun =
2430             p_track->p_sample->data.p_sample_soun;
2431
2432         if( p_soun->i_qt_version == 0 )
2433         {
2434             i_pos += ( p_track->i_sample -
2435                        p_track->chunk[p_track->i_chunk].i_sample_first ) *
2436                      p_track->i_sample_size;
2437         }
2438         else
2439         {
2440             /* we read chunk by chunk unless a blockalign is requested */
2441             if( p_track->fmt.audio.i_blockalign > 1 )
2442                 i_pos += ( p_track->i_sample - p_track->chunk[p_track->i_chunk].i_sample_first ) /
2443                                 p_soun->i_sample_per_packet * p_soun->i_bytes_per_frame;
2444         }
2445     }
2446     else
2447     {
2448         for( i_sample = p_track->chunk[p_track->i_chunk].i_sample_first;
2449              i_sample < p_track->i_sample; i_sample++ )
2450         {
2451             i_pos += p_track->p_sample_size[i_sample];
2452         }
2453     }
2454
2455     return i_pos;
2456 }
2457
2458 static int MP4_TrackNextSample( demux_t *p_demux, mp4_track_t *p_track )
2459 {
2460     if( p_track->fmt.i_cat == AUDIO_ES && p_track->i_sample_size != 0 )
2461     {
2462         MP4_Box_data_sample_soun_t *p_soun;
2463
2464         p_soun = p_track->p_sample->data.p_sample_soun;
2465
2466         if( p_soun->i_qt_version == 1 )
2467         {
2468             /* we read chunk by chunk unless a blockalign is requested */
2469             if( p_track->fmt.audio.i_blockalign > 1 )
2470                 p_track->i_sample += p_soun->i_sample_per_packet;
2471             else
2472                 p_track->i_sample += p_track->chunk[p_track->i_chunk].i_sample_count;
2473         }
2474         else if( p_track->i_sample_size > 256 )
2475         {
2476             /* We do that so we don't read too much data
2477              * (in this case we are likely dealing with compressed data) */
2478             p_track->i_sample += 1;
2479         }
2480         else
2481         {
2482             /* FIXME */
2483             p_track->i_sample += QT_V0_MAX_SAMPLES;
2484             if( p_track->i_sample >
2485                 p_track->chunk[p_track->i_chunk].i_sample_first +
2486                 p_track->chunk[p_track->i_chunk].i_sample_count )
2487             {
2488                 p_track->i_sample =
2489                     p_track->chunk[p_track->i_chunk].i_sample_first +
2490                     p_track->chunk[p_track->i_chunk].i_sample_count;
2491             }
2492         }
2493     }
2494     else
2495     {
2496         p_track->i_sample++;
2497     }
2498
2499     if( p_track->i_sample >= p_track->i_sample_count )
2500         return VLC_EGENERIC;
2501
2502     /* Have we changed chunk ? */
2503     if( p_track->i_sample >=
2504             p_track->chunk[p_track->i_chunk].i_sample_first +
2505             p_track->chunk[p_track->i_chunk].i_sample_count )
2506     {
2507         if( TrackGotoChunkSample( p_demux, p_track, p_track->i_chunk + 1,
2508                                   p_track->i_sample ) )
2509         {
2510             msg_Warn( p_demux, "track[0x%x] will be disabled "
2511                       "(cannot restart decoder)", p_track->i_track_ID );
2512             MP4_TrackUnselect( p_demux, p_track );
2513             return VLC_EGENERIC;
2514         }
2515     }
2516
2517     /* Have we changed elst */
2518     if( p_track->p_elst && p_track->p_elst->data.p_elst->i_entry_count > 0 )
2519     {
2520         demux_sys_t *p_sys = p_demux->p_sys;
2521         MP4_Box_data_elst_t *elst = p_track->p_elst->data.p_elst;
2522         uint64_t i_mvt = MP4_TrackGetDTS( p_demux, p_track ) *
2523                         p_sys->i_timescale / (int64_t)1000000;
2524
2525         if( (unsigned int)p_track->i_elst < elst->i_entry_count &&
2526             i_mvt >= p_track->i_elst_time +
2527                      elst->i_segment_duration[p_track->i_elst] )
2528         {
2529             MP4_TrackSetELST( p_demux, p_track,
2530                               MP4_TrackGetDTS( p_demux, p_track ) );
2531         }
2532     }
2533
2534     return VLC_SUCCESS;
2535 }
2536
2537 static void MP4_TrackSetELST( demux_t *p_demux, mp4_track_t *tk,
2538                               int64_t i_time )
2539 {
2540     demux_sys_t *p_sys = p_demux->p_sys;
2541     int         i_elst_last = tk->i_elst;
2542
2543     /* handle elst (find the correct one) */
2544     tk->i_elst      = 0;
2545     tk->i_elst_time = 0;
2546     if( tk->p_elst && tk->p_elst->data.p_elst->i_entry_count > 0 )
2547     {
2548         MP4_Box_data_elst_t *elst = tk->p_elst->data.p_elst;
2549         int64_t i_mvt= i_time * p_sys->i_timescale / (int64_t)1000000;
2550
2551         for( tk->i_elst = 0; (unsigned int)tk->i_elst < elst->i_entry_count; tk->i_elst++ )
2552         {
2553             mtime_t i_dur = elst->i_segment_duration[tk->i_elst];
2554
2555             if( tk->i_elst_time <= i_mvt && i_mvt < tk->i_elst_time + i_dur )
2556             {
2557                 break;
2558             }
2559             tk->i_elst_time += i_dur;
2560         }
2561
2562         if( (unsigned int)tk->i_elst >= elst->i_entry_count )
2563         {
2564             /* msg_Dbg( p_demux, "invalid number of entry in elst" ); */
2565             tk->i_elst = elst->i_entry_count - 1;
2566             tk->i_elst_time -= elst->i_segment_duration[tk->i_elst];
2567         }
2568
2569         if( elst->i_media_time[tk->i_elst] < 0 )
2570         {
2571             /* track offset */
2572             tk->i_elst_time += elst->i_segment_duration[tk->i_elst];
2573         }
2574     }
2575     if( i_elst_last != tk->i_elst )
2576     {
2577         msg_Warn( p_demux, "elst old=%d new=%d", i_elst_last, tk->i_elst );
2578     }
2579 }
2580
2581 /* */
2582 static const char *MP4_ConvertMacCode( uint16_t i_code )
2583 {
2584     static const struct { const char *psz_iso639_1; uint16_t i_code; } p_cvt[] = {
2585         { "en",   0 }, { "fr",   1 }, { "de",   2 }, { "it",   3 }, { "nl",   4 },
2586         { "sv",   5 }, { "es",   6 }, { "da",   7 }, { "pt",   8 }, { "no",   9 },
2587         { "he",  10 }, { "ja",  11 }, { "ar",  12 }, { "fi",  13 }, { "el",  14 },
2588         { "is",  15 }, { "mt",  16 }, { "tr",  17 }, { "hr",  18 }, { "zh",  19 },
2589         { "ur",  20 }, { "hi",  21 }, { "th",  22 }, { "ko",  23 }, { "lt",  24 },
2590         { "pl",  25 }, { "hu",  26 }, { "et",  27 }, { "lv",  28 }, //{ "??",  29 },
2591         { "fo",  30 }, { "fa",  31 }, { "ru",  32 }, { "zh",  33 }, { "nl",  34 },
2592         { "ga",  35 }, { "sq",  36 }, { "ro",  37 }, { "cs",  38 }, { "sk",  39 },
2593         { "sl",  40 }, { "yi",  41 }, { "sr",  42 }, { "mk",  43 }, { "bg",  44 },
2594         { "uk",  45 }, { "be",  46 }, { "uz",  47 }, { "az",  48 }, { "kk",  48 },
2595         { "az",  50 }, { "hy",  51 }, { "ka",  52 }, { "mo",  53 }, { "ky",  54 },
2596         { "tg",  55 }, { "tk",  56 }, { "mn",  57 }, { "mn",  58 }, { "ps",  59 },
2597         { "ku",  60 }, { "ks",  61 }, { "sd",  62 }, { "bo",  63 }, { "ne",  64 },
2598         { "sa",  65 }, { "mr",  66 }, { "bn",  67 }, { "as",  68 }, { "gu",  69 },
2599         { "pa",  70 }, { "or",  71 }, { "ml",  72 }, { "kn",  73 }, { "ta",  74 },
2600         { "te",  75 }, { "si",  76 }, { "my",  77 }, { "km",  78 }, { "lo",  79 },
2601         { "vi",  80 }, { "id",  81 }, { "tl",  82 }, { "ms",  83 }, { "ms",  84 },
2602         { "am",  85 }, { "ti",  86 }, { "om",  87 }, { "so",  88 }, { "sw",  89 },
2603         { "rw",  90 }, { "rn",  91 }, { "ny",  92 }, { "mg",  93 }, { "eo",  94 },
2604
2605                                                      { "cy", 128 }, { "eu", 129 },
2606         { "ca", 130 }, { "la", 131 }, { "qu", 132 }, { "gn", 133 }, { "ay", 134 },
2607         { "tt", 135 }, { "ug", 136 }, { "dz", 137 }, { "jv", 138 }, { "su", 139 },
2608         { "gl", 140 }, { "af", 141 }, { "br", 142 }, { "iu", 143 }, { "gd", 144 },
2609         { "gv", 145 }, { "ga", 146 }, { "to", 147 }, { "el", 148 },
2610         /* */
2611         { NULL, 0 }
2612     };
2613     int i;
2614     for( i = 0; p_cvt[i].psz_iso639_1 != NULL; i++ )
2615     {
2616         if( p_cvt[i].i_code == i_code )
2617             return p_cvt[i].psz_iso639_1;
2618     }
2619     return "";
2620 }