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 VideoLAN
   5  * $Id: mp4.c,v 1.15 2003/01/25 17:57:36 fenrir Exp $
   6  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include <stdlib.h>                                      /* malloc(), free() */
  27 #include <string.h>                                              /* strdup() */
  28 #include <errno.h>
  29 #include <sys/types.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/input.h>
  33 #include "codecs.h"
  34 #include "libmp4.h"
  35 #include "mp4.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int    MP4Init    ( vlc_object_t * );
  41 static void __MP4End     ( vlc_object_t * );
  42 static int    MP4Demux   ( input_thread_t * );
  43
  44 /* New input could have something like that... */
  45 static int   MP4Seek     ( input_thread_t *, mtime_t );
  46
  47 #define MP4End(a) __MP4End(VLC_OBJECT(a))
  48
  49 /*****************************************************************************
  50  * Module descriptor
  51  *****************************************************************************/
  52 vlc_module_begin();
  53     set_description( "MP4 demuxer" );
  54     set_capability( "demux", 242 );
  55     set_callbacks( MP4Init, __MP4End );
  56 vlc_module_end();
  57
  58 /*****************************************************************************
  59  * Declaration of local function
  60  *****************************************************************************/
  61
  62 static int MP4_TrackSynchro( input_thread_t *p_input, track_data_mp4_t *p_track );
  63
  64 static void MP4_ParseTrack();
  65
  66 static int MP4_CreateChunksIndex();
  67 static int MP4_CreateSamplesIndex();
  68
  69 static void MP4_StartDecoder();
  70 static void MP4_StopDecoder();
  71
  72 static int  MP4_ReadSample();
  73 static int  MP4_DecodeSample();
  74
  75 #define MP4_Set4BytesLE( p, dw ) \
  76     *((uint8_t*)p)   = ( (dw)&0xff ); \
  77     *((uint8_t*)p+1) = ( ((dw)>> 8)&0xff ); \
  78     *((uint8_t*)p+2) = ( ((dw)>>16)&0xff ); \
  79     *((uint8_t*)p+3) = ( ((dw)>>24)&0xff )
  80
  81 #define MP4_Set2BytesLE( p, dw ) \
  82     *((uint8_t*)p) = ( (dw)&0xff ); \
  83     *((uint8_t*)p+1) = ( ((dw)>> 8)&0xff )
  84
  85
  86 /*****************************************************************************
  87  * MP4Init: check file and initializes MP4 structures
  88  *****************************************************************************/
  89 static int MP4Init( vlc_object_t * p_this )
  90 {
  91     input_thread_t  *p_input = (input_thread_t *)p_this;
  92     uint8_t         *p_peek;
  93
  94     demux_sys_t     *p_demux;
  95
  96     MP4_Box_t       *p_ftyp;
  97
  98
  99     MP4_Box_t       *p_mvhd;
 100     MP4_Box_t       *p_trak;
 101
 102     unsigned int    i;
 103     /* I need to seek */
 104     if( !p_input->stream.b_seekable )
 105     {
 106         msg_Warn( p_input, "MP4 plugin discarded (unseekable)" );
 107         return( -1 );
 108
 109     }
 110     /* Initialize access plug-in structures. */
 111     if( p_input->i_mtu == 0 )
 112     {
 113         /* Improve speed. */
 114         p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
 115     }
 116
 117     p_input->pf_demux = MP4Demux;
 118
 119     /* a little test to see if it could be a mp4 */
 120     if( input_Peek( p_input, &p_peek, 8 ) < 8 )
 121     {
 122         msg_Warn( p_input, "MP4 plugin discarded (cannot peek)" );
 123         return( -1 );
 124     }
 125
 126
 127     switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
 128     {
 129         case( FOURCC_ftyp ):
 130         case( FOURCC_moov ):
 131         case( FOURCC_moof ):
 132         case( FOURCC_mdat ):
 133         case( FOURCC_udta ):
 134         case( FOURCC_free ):
 135         case( FOURCC_skip ):
 136         case( FOURCC_wide ):
 137             break;
 138          default:
 139             msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
 140             return( -1 );
 141     }
 142
 143     /* create our structure that will contains all data */
 144     if( !( p_input->p_demux_data =
 145                 p_demux = malloc( sizeof( demux_sys_t ) ) ) )
 146     {
 147         msg_Err( p_input, "out of memory" );
 148         return( -1 );
 149     }
 150     memset( p_demux, 0, sizeof( demux_sys_t ) );
 151     p_input->p_demux_data = p_demux;
 152
 153
 154     /* Now load all boxes ( except raw data ) */
 155     if( !MP4_BoxGetRoot( p_input, &p_demux->box_root ) )
 156     {
 157         msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
 158         return( -1 );
 159     }
 160
 161     MP4_BoxDumpStructure( p_input, &p_demux->box_root );
 162
 163     if( ( p_ftyp = MP4_BoxGet( &p_demux->box_root, "/ftyp" ) ) )
 164     {
 165         switch( p_ftyp->data.p_ftyp->i_major_brand )
 166         {
 167             case( FOURCC_isom ):
 168                 msg_Info( p_input,
 169                           "ISO Media file (isom) version %d.",
 170                           p_ftyp->data.p_ftyp->i_minor_version );
 171                 break;
 172             default:
 173                 msg_Info( p_input,
 174                           "Unrecognize major file specification (%c%c%c%c).",
 175                            p_ftyp->data.p_ftyp->i_major_brand&0xff,
 176                            ( p_ftyp->data.p_ftyp->i_major_brand >>  8)&0xff,
 177                            ( p_ftyp->data.p_ftyp->i_major_brand >> 16 )&0xff,
 178                            ( p_ftyp->data.p_ftyp->i_major_brand >> 24 )&0xff );
 179                 break;
 180         }
 181     }
 182     else
 183     {
 184         msg_Info( p_input, "File Type box missing(assume ISO Media file)" );
 185     }
 186
 187     /* the file need to have one moov box */
 188     if( MP4_BoxCount( &p_demux->box_root, "/moov" ) != 1 )
 189     {
 190         msg_Err( p_input,
 191                  "MP4 plugin discarded (%d moov box)",
 192                  MP4_BoxCount( &p_demux->box_root, "/moov" ) );
 193 //        MP4End( p_input );
 194 //        return( -1 );
 195     }
 196
 197     if( !(p_mvhd = MP4_BoxGet( &p_demux->box_root, "/moov/mvhd" ) ) )
 198     {
 199         msg_Err( p_input, "cannot find /moov/mvhd !" );
 200         MP4End( p_input );
 201         return( -1 );
 202     }
 203     else
 204     {
 205         p_demux->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
 206         p_demux->i_duration = p_mvhd->data.p_mvhd->i_duration;
 207     }
 208
 209     if( !( p_demux->i_tracks =
 210                 MP4_BoxCount( &p_demux->box_root, "/moov/trak" ) ) )
 211     {
 212         msg_Err( p_input, "cannot find any /moov/trak !" );
 213         MP4End( p_input );
 214         return( -1 );
 215     }
 216     msg_Dbg( p_input, "find %d track%c",
 217                         p_demux->i_tracks,
 218                         p_demux->i_tracks ? 's':' ' );
 219
 220     /* allocate memory */
 221     p_demux->track = calloc( p_demux->i_tracks, sizeof( track_data_mp4_t ) );
 222
 223     /* now process each track and extract all usefull informations */
 224     for( i = 0; i < p_demux->i_tracks; i++ )
 225     {
 226         p_trak = MP4_BoxGet( &p_demux->box_root, "/moov/trak[%d]", i );
 227         MP4_ParseTrack( p_input, &p_demux->track[i], p_trak );
 228
 229         if( p_demux->track[i].b_ok )
 230         {
 231             char *psz_cat;
 232             switch( p_demux->track[i].i_cat )
 233             {
 234                 case( VIDEO_ES ):
 235                     psz_cat = "video";
 236                     break;
 237                 case( AUDIO_ES ):
 238                     psz_cat = "audio";
 239                     break;
 240                 default:
 241                     psz_cat = "unknown";
 242                     break;
 243             }
 244
 245             msg_Dbg( p_input, "adding track[Id 0x%x] %s (%s) language %c%c%c",
 246                             p_demux->track[i].i_track_ID,
 247                             psz_cat,
 248                             p_demux->track[i].b_enable ? "enable":"disable",
 249                             p_demux->track[i].i_language[0],
 250                             p_demux->track[i].i_language[1],
 251                             p_demux->track[i].i_language[2] );
 252         }
 253         else
 254         {
 255             msg_Dbg( p_input, "ignoring track[Id 0x%x]", p_demux->track[i].i_track_ID );
 256         }
 257
 258     }
 259
 260     /*  create one program */
 261     vlc_mutex_lock( &p_input->stream.stream_lock );
 262     if( input_InitStream( p_input, 0 ) == -1)
 263     {
 264         vlc_mutex_unlock( &p_input->stream.stream_lock );
 265         msg_Err( p_input, "cannot init stream" );
 266         MP4End( p_input );
 267         return( -1 );
 268     }
 269     if( input_AddProgram( p_input, 0, 0) == NULL )
 270     {
 271         vlc_mutex_unlock( &p_input->stream.stream_lock );
 272         msg_Err( p_input, "cannot add program" );
 273         MP4End( p_input );
 274         return( -1 );
 275     }
 276     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 277     /* XXX beurk and beurk, see MP4Demux and MP4Seek */
 278     if( p_demux->i_duration/p_demux->i_timescale > 0 )
 279     {
 280         p_input->stream.i_mux_rate =
 281             p_input->stream.p_selected_area->i_size / 50 /
 282             ( p_demux->i_duration / p_demux->i_timescale );
 283     }
 284     else
 285     {
 286         p_input->stream.i_mux_rate = 0;
 287     }
 288     vlc_mutex_unlock( &p_input->stream.stream_lock );
 289
 290
 291     for( i = 0; i < p_demux->i_tracks; i++ )
 292     {
 293         /* start decoder for this track if enable by default*/
 294         if( p_demux->track[i].b_enable )
 295         {
 296             MP4_StartDecoder( p_input, &p_demux->track[i] );
 297         }
 298     }
 299
 300     vlc_mutex_lock( &p_input->stream.stream_lock );
 301     p_input->stream.p_selected_program->b_is_ok = 1;
 302     vlc_mutex_unlock( &p_input->stream.stream_lock );
 303
 304     return( 0 );
 305
 306 }
 307
 308 /*****************************************************************************
 309  * MP4Demux: read packet and send them to decoders
 310  *****************************************************************************
 311  * TODO check for newly selected track (ie audio upt to now )
 312  *****************************************************************************/
 313 static int MP4Demux( input_thread_t *p_input )
 314 {
 315     demux_sys_t *p_demux = p_input->p_demux_data;
 316     unsigned int i_track;
 317
 318     /* XXX beurk, beuRK and BEURK,
 319        but only way I've found to detect seek from interface */
 320     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
 321     {
 322         mtime_t i_date;
 323
 324         /* first wait for empty buffer, arbitrary time FIXME */
 325         msleep( DEFAULT_PTS_DELAY );
 326         /* *** calculate new date *** */
 327
 328         i_date = (mtime_t)1000000 *
 329                  (mtime_t)p_demux->i_duration /
 330                  (mtime_t)p_demux->i_timescale *
 331                  (mtime_t)MP4_TellAbsolute( p_input ) /
 332                  (mtime_t)p_input->stream.p_selected_area->i_size;
 333         MP4Seek( p_input, i_date );
 334     }
 335
 336     /* first wait for the good time to read a packet */
 337     input_ClockManageRef( p_input,
 338                           p_input->stream.p_selected_program,
 339                           p_demux->i_pcr );
 340
 341
 342     /* update pcr XXX in mpeg scale so in 90000 unit/s */
 343     p_demux->i_pcr = MP4_GetMoviePTS( p_demux ) * 9 / 100;
 344
 345
 346     /* we will read 100ms for each stream so ...*/
 347     p_demux->i_time += __MAX( p_demux->i_timescale / 10 , 1 );
 348
 349
 350     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 351     {
 352         if( ( !p_demux->track[i_track].b_ok )||
 353             ( !p_demux->track[i_track].p_es )||
 354             ( !p_demux->track[i_track].p_es->p_decoder_fifo )||
 355             ( MP4_GetTrackPTS( &p_demux->track[i_track] ) >=
 356                         MP4_GetMoviePTS( p_demux ) ) )
 357         {
 358             continue; /* no need to read something */
 359         }
 360         while( MP4_GetTrackPTS( &p_demux->track[i_track] ) <
 361                         MP4_GetMoviePTS( p_demux ) )
 362         {
 363
 364             pes_packet_t *p_pes;
 365
 366             /* read a sample */
 367             if( !MP4_ReadSample( p_input ,
 368                                  &p_demux->track[i_track],
 369                                  &p_pes ) )
 370             {
 371                 break;
 372             }
 373
 374             /* send it to decoder and update time of this track
 375                  it also launch a new decoder if needed */
 376             MP4_DecodeSample( p_input ,
 377                               &p_demux->track[i_track],
 378                               p_pes );
 379         }
 380
 381     }
 382
 383     /* now check if all tracks are finished or unhandled*/
 384
 385     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 386     {
 387         if( ( p_demux->track[i_track].b_ok )&&
 388             ( p_demux->track[i_track].i_sample < p_demux->track[i_track].i_sample_count )&&
 389             ( p_demux->track[i_track].p_es )&&
 390             ( p_demux->track[i_track].p_es->p_decoder_fifo ) )
 391         {
 392             return( 1 );
 393         }
 394     }
 395
 396     return( 0 ); /* EOF */
 397 }
 398 /*****************************************************************************
 399  * MP4Seek: Got to i_date
 400  ******************************************************************************/
 401 static int   MP4Seek     ( input_thread_t *p_input, mtime_t i_date )
 402 {
 403     demux_sys_t *p_demux = p_input->p_demux_data;
 404     unsigned int i_track;
 405
 406     /* First update update global time */
 407     p_demux->i_time = i_date * p_demux->i_timescale / 1000000;
 408     p_demux->i_pcr = __MAX( MP4_GetMoviePTS( p_demux ) - DEFAULT_PTS_DELAY,
 409                             0 ) * 9 / 100;
 410
 411     /* Now for each stream try to go to this time */
 412     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 413     {
 414         MP4_TrackSynchro( p_input, &p_demux->track[i_track] );
 415     }
 416     return( 1 );
 417 }
 418
 419 /*****************************************************************************
 420  * MP4End: frees unused data
 421  *****************************************************************************/
 422 static void __MP4End ( vlc_object_t * p_this )
 423 {
 424 #define FREE( p ) \
 425     if( p ) { free( p ); }
 426     unsigned int i_track;
 427     input_thread_t *  p_input = (input_thread_t *)p_this;
 428     demux_sys_t *p_demux = p_input->p_demux_data;
 429
 430     msg_Dbg( p_input, "Freeing all memory" );
 431     MP4_BoxFree( p_input, &p_demux->box_root );
 432     for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
 433     {
 434         unsigned int i_chunk;
 435         for( i_chunk = 0;
 436                 i_chunk < p_demux->track[i_track].i_chunk_count; i_chunk++ )
 437         {
 438             if( p_demux->track[i_track].chunk )
 439             {
 440                FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_count_dts);
 441                FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_delta_dts );
 442             }
 443         }
 444         FREE( p_demux->track[i_track].chunk );
 445
 446         if( !p_demux->track[i_track].i_sample_size )
 447         {
 448             FREE( p_demux->track[i_track].p_sample_size );
 449         }
 450     }
 451     FREE( p_demux->track );
 452
 453     FREE( p_input->p_demux_data );
 454 #undef FREE
 455 }
 456
 457
 458 /****************************************************************************
 459  * Local functions, specific to vlc
 460  ****************************************************************************/
 461
 462 /****************************************************************************
 463  * MP4_TrackSynchro : synchronize a track with movie time after seek or
 464  *                    for newly selected track
 465  *****************************************************************************
 466  * TODO add support of Edit List (edts/elts) and Shadow Sync Sample(stsh)
 467  ****************************************************************************/
 468 static int MP4_TrackSynchro( input_thread_t *p_input, track_data_mp4_t *p_track )
 469 {
 470     demux_sys_t *p_demux = p_input->p_demux_data;
 471     unsigned int i_chunk_last;
 472     MP4_Box_t   *p_stss;
 473
 474     if( !p_track->b_ok ||
 475         !p_track->p_es ||
 476         !p_track->p_es->p_decoder_fifo )
 477     {
 478         return( 0 );
 479     }
 480     p_track->i_sample = 0;
 481     i_chunk_last = p_track->i_chunk;
 482     p_track->i_chunk = 0;
 483     for( ;; )
 484     {
 485         if( p_track->i_sample >= p_track->i_sample_count )
 486         {
 487             msg_Warn( p_input,
 488                         "track[Id 0x%x] will be disabled (seeking too far)",
 489                         p_track->i_track_ID );
 490             MP4_StopDecoder( p_input, p_track );
 491             break;
 492         }
 493         if( MP4_GetTrackPTS( p_track ) >= MP4_GetMoviePTS( p_demux ) )
 494         {
 495             break;
 496         }
 497         /* go one sample after */
 498         p_track->i_sample++;
 499         if( p_track->i_sample >= p_track->chunk[p_track->i_chunk].i_sample_first +
 500                 p_track->chunk[p_track->i_chunk].i_sample_count )
 501         {
 502             p_track->i_chunk++;
 503         }
 504
 505     }
 506     if( p_track->i_sample >= p_track->i_sample_count )
 507     {
 508         return( 0 );
 509     }
 510
 511     /* *** Try to find nearest sync points *** */
 512     if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
 513     {
 514         unsigned int i_index;
 515         msg_Dbg( p_input,
 516                     "track[Id 0x%x] using Sync Sample Box (stss)",
 517                     p_track->i_track_ID );
 518         for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
 519         {
 520             if( p_stss->data.p_stss->i_sample_number[i_index] >= p_track->i_sample )
 521             {
 522                 if( i_index > 0 )
 523                 {
 524                     msg_Dbg( p_input, "stts gives %d --> %d (sample number)",
 525                             p_track->i_sample,
 526                             p_stss->data.p_stss->i_sample_number[i_index-1] );
 527                     p_track->i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
 528                     /* new track.i_sample is less than old so i_chunk can only decreased */
 529                     while( p_track->i_chunk > 0 &&
 530                             p_track->i_sample < p_track->chunk[p_track->i_chunk].i_sample_first )
 531                     {
 532                         p_track->i_chunk--;
 533                     }
 534                 }
 535                 else
 536                 {
 537                     msg_Dbg( p_input, "stts gives %d --> %d (sample number)",
 538                             p_track->i_sample,
 539                             p_stss->data.p_stss->i_sample_number[i_index-1] );
 540                     p_track->i_sample = p_stss->data.p_stss->i_sample_number[i_index];
 541                     /* new track.i_sample is more than old so i_chunk can only increased */
 542                     while( p_track->i_chunk < p_track->i_chunk_count - 1 &&
 543                            p_track->i_sample >= p_track->chunk[p_track->i_chunk].i_sample_first +
 544                                                 p_track->chunk[p_track->i_chunk].i_sample_count )
 545                     {
 546                         p_track->i_chunk++;
 547                     }
 548                 }
 549                 break;
 550             }
 551         }
 552     }
 553     else
 554     {
 555         msg_Dbg( p_input,
 556                     "track[Id 0x%x] doesn't provided Sync Sample Box (stss)",
 557                     p_track->i_track_ID );
 558     }
 559
 560     /* *** If i_sample_description_index has changed restart decoder *** */
 561     if( p_track->chunk[i_chunk_last].i_sample_description_index !=
 562             p_track->chunk[p_track->i_chunk].i_sample_description_index )
 563     {
 564         msg_Warn( p_input,
 565                 "SampleEntry has changed, restarting decoder" );
 566         MP4_StopDecoder( p_input, p_track );
 567         MP4_StartDecoder( p_input, p_track );
 568     }
 569     return( 1 );
 570 }
 571
 572 /****************************************************************************
 573  * Parse track information and create all needed data to run a track
 574  * If it succeed b_ok is set to 1 else to 0
 575  ****************************************************************************/
 576 static void MP4_ParseTrack( input_thread_t *p_input,
 577                      track_data_mp4_t *p_demux_track,
 578                      MP4_Box_t  * p_trak )
 579 {
 580     unsigned int i;
 581
 582     MP4_Box_t *p_tkhd = MP4_BoxGet( p_trak, "tkhd" );
 583     MP4_Box_t *p_tref = MP4_BoxGet( p_trak, "tref" );
 584     MP4_Box_t *p_elst;
 585
 586     MP4_Box_t *p_mdhd;
 587     MP4_Box_t *p_hdlr;
 588
 589     MP4_Box_t *p_vmhd;
 590     MP4_Box_t *p_smhd;
 591
 592     /* hint track unsuported */
 593
 594     /* by default, track isn't usable */
 595     p_demux_track->b_ok = 0;
 596
 597     /* by default, we don't known the categorie */
 598     p_demux_track->i_cat = UNKNOWN_ES;
 599
 600     if( !p_tkhd )
 601     {
 602         return;
 603     }
 604
 605     /* do we launch this track by default ? */
 606     p_demux_track->b_enable =
 607         ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
 608
 609     p_demux_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
 610     p_demux_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
 611     p_demux_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
 612
 613     if( ( p_elst = MP4_BoxGet( p_trak, "edts/elst" ) ) )
 614     {
 615 /*        msg_Warn( p_input, "Unhandled box: edts --> FIXME" ); */
 616     }
 617
 618     if( p_tref )
 619     {
 620 /*        msg_Warn( p_input, "Unhandled box: tref --> FIXME" ); */
 621     }
 622
 623     p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
 624     p_hdlr = MP4_BoxGet( p_trak, "mdia/hdlr" );
 625
 626     if( ( !p_mdhd )||( !p_hdlr ) )
 627     {
 628         return;
 629     }
 630
 631     p_demux_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;
 632
 633     for( i = 0; i < 3; i++ )
 634     {
 635         p_demux_track->i_language[i] = p_mdhd->data.p_mdhd->i_language[i];
 636     }
 637     p_mdhd->data.p_mdhd->i_language[3] = 0;
 638
 639     switch( p_hdlr->data.p_hdlr->i_handler_type )
 640     {
 641         case( FOURCC_soun ):
 642             if( !( p_smhd = MP4_BoxGet( p_trak, "mdia/minf/smhd" ) ) )
 643             {
 644                 return;
 645             }
 646             p_demux_track->i_cat = AUDIO_ES;
 647             break;
 648
 649         case( FOURCC_vide ):
 650             if( !( p_vmhd = MP4_BoxGet( p_trak, "mdia/minf/vmhd" ) ) )
 651             {
 652                 return;
 653             }
 654             p_demux_track->i_cat = VIDEO_ES;
 655             break;
 656
 657         default:
 658             return;
 659     }
 660 /*  TODO
 661     add support for:
 662     p_dinf = MP4_BoxGet( p_minf, "dinf" );
 663 */
 664     if( !( p_demux_track->p_stbl = MP4_BoxGet( p_trak,"mdia/minf/stbl" ) ) )
 665     {
 666         return;
 667     }
 668
 669     if( !( p_demux_track->p_stsd = MP4_BoxGet( p_trak,"mdia/minf/stbl/stsd") ) )
 670     {
 671         return;
 672     }
 673
 674     /* Create chunk  index table */
 675     if( !MP4_CreateChunksIndex( p_input,p_demux_track  ) )
 676     {
 677         return; /* cannot create chunks index */
 678     }
 679
 680     /* create sample index table needed for reading and seeking */
 681     if( !MP4_CreateSamplesIndex( p_input, p_demux_track ) )
 682     {
 683         return; /* cannot create samples index */
 684     }
 685
 686     p_demux_track->b_ok = 1;
 687 }
 688
 689
 690
 691 /* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
 692 static int MP4_CreateChunksIndex( input_thread_t *p_input,
 693                                    track_data_mp4_t *p_demux_track )
 694 {
 695     MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
 696     MP4_Box_t *p_stsc;
 697
 698     unsigned int i_chunk;
 699     unsigned int i_index, i_last;
 700
 701
 702     if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
 703           !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )||
 704         ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
 705     {
 706         return( 0 );
 707     }
 708
 709     p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
 710     if( !p_demux_track->i_chunk_count )
 711     {
 712         msg_Warn( p_input, "No chunk defined" );
 713         return( 0 );
 714     }
 715     p_demux_track->chunk = calloc( p_demux_track->i_chunk_count,
 716                                    sizeof( chunk_data_mp4_t ) );
 717
 718     /* first we read chunk offset */
 719     for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 720     {
 721         p_demux_track->chunk[i_chunk].i_offset =
 722                 p_co64->data.p_co64->i_chunk_offset[i_chunk];
 723     }
 724
 725     /* now we read index for SampleEntry( soun vide mp4a mp4v ...)
 726         to be used for the sample XXX begin to 1
 727         We construct it begining at the end */
 728     i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
 729     i_index = p_stsc->data.p_stsc->i_entry_count;
 730     if( !i_index )
 731     {
 732         msg_Warn( p_input, "cannot read chunk table or table empty" );
 733         return( 0 );
 734     }
 735
 736     while( i_index )
 737     {
 738         i_index--;
 739         for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 740                 i_chunk < i_last; i_chunk++ )
 741         {
 742             p_demux_track->chunk[i_chunk].i_sample_description_index =
 743                     p_stsc->data.p_stsc->i_sample_description_index[i_index];
 744             p_demux_track->chunk[i_chunk].i_sample_count =
 745                     p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
 746         }
 747         i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
 748     }
 749
 750     p_demux_track->chunk[i_chunk].i_sample_first = 0;
 751     for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 752     {
 753         p_demux_track->chunk[i_chunk].i_sample_first =
 754             p_demux_track->chunk[i_chunk-1].i_sample_first +
 755                 p_demux_track->chunk[i_chunk-1].i_sample_count;
 756
 757     }
 758
 759     msg_Dbg( p_input,
 760              "track[Id 0x%x] read %d chunk",
 761              p_demux_track->i_track_ID,
 762             p_demux_track->i_chunk_count );
 763     return( 1 );
 764
 765 }
 766
 767
 768
 769 static int MP4_CreateSamplesIndex( input_thread_t *p_input,
 770                                    track_data_mp4_t *p_demux_track )
 771 {
 772     MP4_Box_t *p_stts; /* makes mapping between sample and decoding time,
 773                           ctts make same mapping but for composition time,
 774                           not yet used and probably not usefull */
 775     MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2
 776                           that uses a compressed form FIXME make them in libmp4
 777                           as a unique type */
 778     /* TODO use also stss and stsh table for seeking */
 779     /* FIXME use edit table */
 780     int64_t i_sample;
 781     int64_t i_chunk;
 782
 783     int64_t i_index;
 784     int64_t i_index_sample_used;
 785
 786     int64_t i_last_dts;
 787
 788     p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
 789     p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
 790
 791
 792     if( ( !p_stts )||( !p_stsz ) )
 793     {
 794         msg_Warn( p_input, "cannot read sample table" );
 795         return( 0 );
 796     }
 797
 798     p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count;
 799
 800
 801     /* for sample size, there are 2 case */
 802     if( p_stsz->data.p_stsz->i_sample_size )
 803     {
 804         /* 1: all sample have the same size, so no need to construct a table */
 805         p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size;
 806         p_demux_track->p_sample_size = NULL;
 807     }
 808     else
 809     {
 810         /* 2: each sample can have a different size */
 811         p_demux_track->i_sample_size = 0;
 812         p_demux_track->p_sample_size =
 813             calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
 814
 815         for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
 816         {
 817             p_demux_track->p_sample_size[i_sample] =
 818                     p_stsz->data.p_stsz->i_entry_size[i_sample];
 819         }
 820     }
 821     /* we have extract all information from stsz,
 822         now use stts */
 823
 824     /* if we don't want to waste too much memory, we can't expand
 825        the box !, so each chunk will contain an "extract" of this table
 826        for fast research */
 827
 828     i_last_dts = 0;
 829     i_index = 0; i_index_sample_used =0;
 830
 831     /* create and init last data for each chunk */
 832     for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
 833     {
 834
 835         int64_t i_entry, i_sample_count, i;
 836         /* save last dts */
 837         p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts;
 838     /* count how many entries needed for this chunk
 839        for p_sample_delta_dts and p_sample_count_dts */
 840
 841         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 842
 843         i_entry = 0;
 844         while( i_sample_count > 0 )
 845         {
 846             i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry];
 847             if( i_entry == 0 )
 848             {
 849                 i_sample_count += i_index_sample_used; /* don't count already used sample
 850                                                    int this entry */
 851             }
 852             i_entry++;
 853         }
 854
 855         /* allocate them */
 856         p_demux_track->chunk[i_chunk].p_sample_count_dts =
 857             calloc( i_entry, sizeof( uint32_t ) );
 858         p_demux_track->chunk[i_chunk].p_sample_delta_dts =
 859             calloc( i_entry, sizeof( uint32_t ) );
 860
 861         /* now copy */
 862         i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
 863         for( i = 0; i < i_entry; i++ )
 864         {
 865             int64_t i_used;
 866             int64_t i_rest;
 867
 868             i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used;
 869
 870             i_used = __MIN( i_rest, i_sample_count );
 871
 872             i_index_sample_used += i_used;
 873             i_sample_count -= i_used;
 874
 875             p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used;
 876
 877             p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] =
 878                         p_stts->data.p_stts->i_sample_delta[i_index];
 879
 880             i_last_dts += i_used *
 881                     p_demux_track->chunk[i_chunk].p_sample_delta_dts[i];
 882
 883             if( i_index_sample_used >=
 884                              p_stts->data.p_stts->i_sample_count[i_index] )
 885             {
 886
 887                 i_index++;
 888                 i_index_sample_used = 0;
 889             }
 890         }
 891
 892     }
 893
 894     msg_Dbg( p_input,
 895              "track[Id 0x%x] read %d samples length:"I64Fd"s",
 896              p_demux_track->i_track_ID,
 897              p_demux_track->i_sample_count,
 898              i_last_dts / p_demux_track->i_timescale );
 899
 900     return( 1 );
 901 }
 902
 903 static void MP4_StartDecoder( input_thread_t *p_input,
 904                                  track_data_mp4_t *p_demux_track )
 905 {
 906     MP4_Box_t *  p_sample;
 907     unsigned int i;
 908     unsigned int i_chunk;
 909
 910     unsigned int i_decoder_specific_info_len;
 911     uint8_t *    p_decoder_specific_info;
 912     pes_packet_t *p_pes_init;
 913
 914     uint8_t             *p_init;
 915     BITMAPINFOHEADER    *p_bih;
 916     WAVEFORMATEX        *p_wf;
 917
 918     MP4_Box_t   *p_esds;
 919
 920
 921     if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
 922     {
 923         return;
 924     }
 925
 926     msg_Dbg( p_input, "Starting decoder for track[Id 0x%x]",
 927                       p_demux_track->i_track_ID );
 928
 929     /* launch decoder according in chunk we are */
 930     i_chunk = p_demux_track->i_chunk;
 931
 932     if( !p_demux_track->chunk[i_chunk].i_sample_description_index )
 933     {
 934         msg_Warn( p_input,
 935                   "invalid SampleEntry index (track[Id 0x%x])",
 936                   p_demux_track->i_track_ID );
 937         return;
 938     }
 939     p_sample = MP4_BoxGet(  p_demux_track->p_stsd,
 940                             "[%d]",
 941                 p_demux_track->chunk[i_chunk].i_sample_description_index - 1 );
 942
 943     if( ( !p_sample )||( !p_sample->data.p_data ) )
 944     {
 945         msg_Warn( p_input,
 946                   "cannot find SampleEntry (track[Id 0x%x])",
 947                   p_demux_track->i_track_ID );
 948         return;
 949     }
 950
 951     vlc_mutex_lock( &p_input->stream.stream_lock );
 952     p_demux_track->p_es = input_AddES( p_input,
 953                                        p_input->stream.p_selected_program,
 954                                        p_demux_track->i_track_ID,
 955                                        0 );
 956     vlc_mutex_unlock( &p_input->stream.stream_lock );
 957     /* Initialise ES, first language as description */
 958     for( i = 0; i < 3; i++ )
 959     {
 960         p_demux_track->p_es->psz_desc[i] = p_demux_track->i_language[i];
 961     }
 962     p_demux_track->p_es->psz_desc[3] = '\0';
 963
 964     p_demux_track->p_es->i_stream_id = p_demux_track->i_track_ID;
 965
 966     /* It's a little ugly but .. there are special cases */
 967     switch( p_sample->i_type )
 968     {
 969         case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
 970         case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
 971             p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
 972             break;
 973         default:
 974             p_demux_track->p_es->i_fourcc = p_sample->i_type;
 975             break;
 976     }
 977
 978     p_demux_track->p_es->i_cat = p_demux_track->i_cat;
 979
 980     i_decoder_specific_info_len = 0;
 981     p_decoder_specific_info = NULL;
 982     p_pes_init = NULL;
 983
 984     /* now see if esds is present and if so create a data packet
 985         with decoder_specific_info  */
 986 #define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
 987     if( ( p_esds = MP4_BoxGet( p_sample, "esds" ) )&&
 988         ( p_esds->data.p_esds )&&
 989         ( p_decconfig ) )
 990     {
 991         /* First update information based on i_objectTypeIndication */
 992         switch( p_decconfig->i_objectTypeIndication )
 993         {
 994             case( 0x20 ): /* MPEG4 VIDEO */
 995                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','v' );
 996                 break;
 997             case( 0x40):
 998                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','a' );
 999                 break;
1000             case( 0x60):
1001             case( 0x61):
1002             case( 0x62):
1003             case( 0x63):
1004             case( 0x64):
1005             case( 0x65): /* MPEG2 video */
1006                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
1007                 break;
1008             /* Theses are MPEG2-AAC */
1009             case( 0x66): /* main profile */
1010             case( 0x67): /* Low complexity profile */
1011             case( 0x68): /* Scaleable Sampling rate profile */
1012                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','a' );
1013                 break;
1014             /* true MPEG 2 audio */
1015             case( 0x69):
1016                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','a' );
1017                 break;
1018             case( 0x6a): /* MPEG1 video */
1019                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
1020                 break;
1021             case( 0x6b): /* MPEG1 audio */
1022                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','a' );
1023                 break;
1024             case( 0x6c ): /* jpeg */
1025                 p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'j','p','e','g' );
1026                 break;
1027             default:
1028                 /* Unknown entry, but don't touch i_fourcc */
1029                 msg_Warn( p_input,
1030                           "objectTypeIndication(0x%x) unknow (Track[ID 0x%x])",
1031                           p_decconfig->i_objectTypeIndication,
1032                           p_demux_track->i_track_ID );
1033                 break;
1034         }
1035         i_decoder_specific_info_len =
1036                 p_decconfig->i_decoder_specific_info_len;
1037         p_decoder_specific_info =
1038                 p_decconfig->p_decoder_specific_info;
1039     }
1040
1041 #undef p_decconfig
1042
1043     /* some last initialisation */
1044     /* XXX I create a bitmapinfoheader_t or
1045        waveformatex_t for each stream, up to now it's the best thing
1046        I've found but it could exist a better solution :) as something
1047        like adding some new fields in p_es ...
1048
1049        XXX I don't set all values, only thoses that are interesting or known
1050         --> bitmapinfoheader_t : width and height
1051         --> waveformatex_t : channels, samplerate, bitspersample
1052         and at the end I add p_decoder_specific_info
1053
1054         TODO set more values
1055
1056      */
1057
1058     switch( p_demux_track->i_cat )
1059     {
1060         case( VIDEO_ES ):
1061             /* now create a bitmapinfoheader_t for decoder and
1062                add information found in p_esds */
1063             /* XXX XXX + 16 are for avoid segfault when ffmpeg access beyong the data */
1064             p_init = malloc( sizeof( BITMAPINFOHEADER ) + i_decoder_specific_info_len + 16 );
1065             p_bih = (BITMAPINFOHEADER*)p_init;
1066
1067             p_bih->biSize     = sizeof( BITMAPINFOHEADER ) + i_decoder_specific_info_len;
1068             p_bih->biWidth    = p_sample->data.p_sample_vide->i_width;
1069             p_bih->biHeight   = p_sample->data.p_sample_vide->i_height;
1070             p_bih->biPlanes   = 1;      // FIXME
1071             p_bih->biBitCount = 0;      // FIXME
1072             p_bih->biCompression   = 0; // FIXME
1073             p_bih->biSizeImage     = 0; // FIXME
1074             p_bih->biXPelsPerMeter = 0; // FIXME
1075             p_bih->biYPelsPerMeter = 0; // FIXME
1076             p_bih->biClrUsed       = 0; // FIXME
1077             p_bih->biClrImportant  = 0; // FIXME
1078
1079             if( p_bih->biWidth == 0 )
1080             {
1081                 // fall on display size
1082                 p_bih->biWidth = p_demux_track->i_width;
1083             }
1084             if( p_bih->biHeight == 0 )
1085             {
1086                 // fall on display size
1087                 p_bih->biHeight = p_demux_track->i_height;
1088             }
1089
1090             if( i_decoder_specific_info_len )
1091             {
1092                 data_packet_t   *p_data;
1093
1094                 memcpy( p_init + sizeof( BITMAPINFOHEADER ),
1095                         p_decoder_specific_info,
1096                         i_decoder_specific_info_len);
1097
1098                 /* If stream is mpeg4 video we send specific_info,
1099                    as it's needed to decode it (vol) */
1100                 switch( p_demux_track->p_es->i_fourcc )
1101                 {
1102                     case VLC_FOURCC( 'm','p','4','v' ):
1103                     case VLC_FOURCC( 'D','I','V','X' ):
1104                     case VLC_FOURCC( 'd','i','v','x' ):
1105                         p_pes_init = input_NewPES( p_input->p_method_data );
1106                         p_data = input_NewPacket( p_input->p_method_data,
1107                                                   i_decoder_specific_info_len);
1108                         memcpy( p_data->p_payload_start,
1109                                 p_decoder_specific_info,
1110                                 i_decoder_specific_info_len );
1111                         p_pes_init->i_dts = p_pes_init->i_pts = 0;
1112                         p_pes_init->p_first = p_pes_init->p_last = p_data;
1113                         p_pes_init->i_nb_data = 1;
1114                         p_pes_init->i_pes_size = i_decoder_specific_info_len;
1115                         break;
1116                     default:
1117                         break;
1118                 }
1119
1120             }
1121             break;
1122
1123         case( AUDIO_ES ):
1124             p_init = malloc( sizeof( WAVEFORMATEX ) + i_decoder_specific_info_len + 16 );
1125             p_wf = (WAVEFORMATEX*)p_init;
1126
1127             p_wf->wFormatTag = 0;
1128             p_wf->nChannels = p_sample->data.p_sample_soun->i_channelcount;
1129             p_wf->nSamplesPerSec = p_sample->data.p_sample_soun->i_sampleratehi;
1130             p_wf->nAvgBytesPerSec = p_sample->data.p_sample_soun->i_channelcount *
1131                                     p_sample->data.p_sample_soun->i_sampleratehi *
1132                                     p_sample->data.p_sample_soun->i_samplesize / 8;
1133             p_wf->nBlockAlign = 0;
1134             p_wf->wBitsPerSample = p_sample->data.p_sample_soun->i_samplesize;
1135             p_wf->cbSize = i_decoder_specific_info_len;
1136
1137             if( i_decoder_specific_info_len )
1138             {
1139                 memcpy( p_init + sizeof( WAVEFORMATEX ),
1140                         p_decoder_specific_info,
1141                         i_decoder_specific_info_len);
1142             }
1143
1144             break;
1145
1146         default:
1147             p_init = NULL;
1148             break;
1149     }
1150     if( p_demux_track->i_cat == AUDIO_ES )
1151     {
1152         p_demux_track->p_es->p_waveformatex = (void*)p_init;
1153     }
1154     else if( p_demux_track->i_cat == VIDEO_ES )
1155     {
1156         p_demux_track->p_es->p_bitmapinfoheader = (void*)p_init;
1157     }
1158     vlc_mutex_lock( &p_input->stream.stream_lock );
1159     input_SelectES( p_input, p_demux_track->p_es );
1160     vlc_mutex_unlock( &p_input->stream.stream_lock );
1161
1162     if( !p_demux_track->p_es->p_decoder_fifo )
1163     {
1164         msg_Warn( p_input, "cannot start decoder" );
1165         if( p_pes_init )
1166         {
1167             input_DeletePES( p_input->p_method_data, p_pes_init );
1168         }
1169         return;
1170     }
1171
1172     if( p_pes_init != NULL )
1173     {
1174         input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes_init );
1175     }
1176     p_demux_track->b_ok = 1;
1177     p_demux_track->b_selected = 1;
1178 }
1179
1180 static void MP4_StopDecoder( input_thread_t *p_input,
1181                              track_data_mp4_t *p_demux_track )
1182 {
1183     msg_Dbg( p_input, "Stopping decoder (track[Id 0x%x])",
1184                       p_demux_track->i_track_ID );
1185
1186     input_UnselectES( p_input, p_demux_track->p_es );
1187     p_demux_track->p_es = NULL;
1188
1189     p_demux_track->b_selected = 0;
1190 }
1191
1192 static int  MP4_ReadSample( input_thread_t *p_input,
1193                             track_data_mp4_t *p_demux_track,
1194                             pes_packet_t **pp_pes )
1195 {
1196     size_t i_size;
1197     off_t i_pos;
1198
1199     data_packet_t *p_data;
1200
1201
1202     /* this track have already reach the end */
1203     if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
1204     {
1205         *pp_pes = NULL;
1206         return( 0 );
1207     }
1208     /* caculate size and position for this sample */
1209     i_size = p_demux_track->i_sample_size ?
1210                     p_demux_track->i_sample_size :
1211                     p_demux_track->p_sample_size[p_demux_track->i_sample];
1212
1213     i_pos  = MP4_GetTrackPos( p_demux_track );
1214
1215     /* go,go go ! */
1216     if( ! MP4_SeekAbsolute( p_input, i_pos ) )
1217     {
1218         return( 0 );
1219     }
1220
1221     /* now create a pes */
1222     if( !(*pp_pes = input_NewPES( p_input->p_method_data ) ) )
1223     {
1224         return( 0 );
1225     }
1226     /* and a data packet for the data */
1227     if( !(p_data = input_NewPacket( p_input->p_method_data, i_size ) ) )
1228     {
1229         input_DeletePES( p_input->p_method_data, *pp_pes );
1230         *pp_pes = NULL;
1231         return( 0 );
1232     }
1233
1234     /* initialisation of all the field */
1235     (*pp_pes)->i_dts =
1236         (*pp_pes)->i_pts = MP4_GetTrackPTS( p_demux_track );
1237     (*pp_pes)->p_first = (*pp_pes)->p_last  = p_data;
1238     (*pp_pes)->i_nb_data = 1;
1239     (*pp_pes)->i_pes_size = i_size;
1240
1241     if( !i_size )
1242     {
1243         return( 1 );
1244     }
1245
1246 /*    msg_Dbg( p_input, "will read %d bytes", i_size ); */
1247     if( !MP4_ReadData( p_input, p_data->p_payload_start, i_size ) )
1248     {
1249         input_DeletePES( p_input->p_method_data, *pp_pes );
1250         return( 0 );
1251     }
1252
1253         return( 1 );
1254 }
1255
1256
1257 static int  MP4_DecodeSample( input_thread_t *p_input,
1258                               track_data_mp4_t *p_demux_track,
1259                               pes_packet_t *p_pes )
1260 {
1261
1262     if( !p_pes )
1263     {
1264         return( 0 );
1265     }
1266
1267     /* don't forget to convert in mpeg clock */
1268     /* FIXME correct ffmpeg to use dts instead of pts that it incorrect
1269        and, set it here ( and correct avi demux ) */
1270     p_pes->i_dts =
1271         p_pes->i_pts = input_ClockGetTS( p_input,
1272                                          p_input->stream.p_selected_program,
1273                                          p_pes->i_pts * 9/100);
1274
1275
1276     input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes );
1277
1278     /* now update sample position */
1279     p_demux_track->i_sample++; /* easy ;) */
1280     if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
1281     {
1282         /* we have reach end of the track so free decoder stuff */
1283         MP4_StopDecoder( p_input, p_demux_track );
1284         return( 1 );
1285     }
1286     /* Have we changed chunk ? */
1287     if( p_demux_track->i_sample >=
1288             p_demux_track->chunk[p_demux_track->i_chunk].i_sample_first +
1289                 p_demux_track->chunk[p_demux_track->i_chunk].i_sample_count )
1290     {
1291         /* we haven't reached the end of the track, so see if we
1292            have to change the decoder for the next frame because
1293            i_sample_description_index has changed */
1294
1295         p_demux_track->i_chunk++;
1296         if( p_demux_track->chunk[p_demux_track->i_chunk-1].i_sample_description_index
1297               != p_demux_track->chunk[p_demux_track->i_chunk].i_sample_description_index  )
1298         {
1299             /* FIXME */
1300             msg_Warn( p_input,
1301                       "SampleEntry has changed, starting a new decoder" );
1302             MP4_StopDecoder( p_input, p_demux_track );
1303             MP4_StartDecoder( p_input, p_demux_track );
1304         }
1305     }
1306
1307
1308     return( 1 );
1309 }
1310
1311
1312