mp4.c 41.3 KB
Newer Older
1 2 3 4
/*****************************************************************************
 * mp4.c : MP4 file input module for vlc
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
5
 * $Id: mp4.c,v 1.5 2002/11/17 06:46:56 fenrir Exp $
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>                                      /* malloc(), free() */
#include <string.h>                                              /* strdup() */
#include <errno.h>
#include <sys/types.h>

#include <vlc/vlc.h>
#include <vlc/input.h>

#include "libmp4.h"
#include "mp4.h"

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int    MP4Init    ( vlc_object_t * );
static void __MP4End     ( vlc_object_t * );
static int    MP4Demux   ( input_thread_t * );

44 45 46
/* New input could have something like that... */
static int   MP4Seek     ( input_thread_t *, mtime_t );

47 48 49 50 51 52 53 54 55 56 57 58 59 60
#define MP4End(a) __MP4End(VLC_OBJECT(a))

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
vlc_module_begin();
    set_description( "MP4 demuxer" );
    set_capability( "demux", 242 );
    set_callbacks( MP4Init, __MP4End );
vlc_module_end();

/*****************************************************************************
 * Declaration of local function 
 *****************************************************************************/
61 62 63

static int MP4_TrackSynchro( input_thread_t *p_input, track_data_mp4_t *p_track );

64 65 66 67 68 69 70 71 72 73 74 75
static void MP4_ParseTrack();

static int MP4_CreateChunksIndex();
static int MP4_CreateSamplesIndex();

static void MP4_StartDecoder();
static void MP4_StopDecoder();

static int  MP4_ReadSample();
static int  MP4_DecodeSample();

#define MP4_Set4BytesLE( p, dw ) \
76 77 78 79
    *((uint8_t*)p)   = ( (dw)&0xff ); \
    *((uint8_t*)p+1) = ( ((dw)>> 8)&0xff ); \
    *((uint8_t*)p+2) = ( ((dw)>>16)&0xff ); \
    *((uint8_t*)p+3) = ( ((dw)>>24)&0xff )
80 81

#define MP4_Set2BytesLE( p, dw ) \
82 83
    *((uint8_t*)p) = ( (dw)&0xff ); \
    *((uint8_t*)p+1) = ( ((dw)>> 8)&0xff )
84 85 86 87 88 89 90

    
/*****************************************************************************
 * MP4Init: check file and initializes MP4 structures
 *****************************************************************************/
static int MP4Init( vlc_object_t * p_this )
{   
91 92 93
    input_thread_t  *p_input = (input_thread_t *)p_this;
    uint8_t         *p_peek;
    uint32_t        i_type;
94
    
95
    demux_sys_t     *p_demux;
96
    
97
    MP4_Box_t       *p_ftyp;
98 99


100 101
    MP4_Box_t       *p_mvhd;
    MP4_Box_t       *p_trak;
102

103
    int             i;
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
    /* I need to seek */
    if( !p_input->stream.b_seekable )
    {
        msg_Warn( p_input, "MP4 plugin discarded (unseekable)" );
        return( -1 );
            
    } 
    /* Initialize access plug-in structures. */
    if( p_input->i_mtu == 0 )
    {
        /* Improve speed. */
        p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE ;
    }

    p_input->pf_demux = MP4Demux;

    /* a little test to see if it could be a mp4 */
    if( input_Peek( p_input, &p_peek, 8 ) < 8 )
    {
        msg_Warn( p_input, "MP4 plugin discarded (cannot peek)" );
        return( -1 );
    }
    i_type = ( p_peek[4] ) + ( p_peek[5] << 8 ) +
                ( p_peek[6] << 16 ) + ( p_peek[7] << 24);
    switch( i_type )
    {
        case( FOURCC_ftyp ):
        case( FOURCC_moov ):
        case( FOURCC_moof ):
        case( FOURCC_mdat ):
134
        case( FOURCC_udta ): 
135 136
        case( FOURCC_free ):
        case( FOURCC_skip ):
137
        case( FOURCC_wide ): 
138 139 140 141 142 143 144 145
            break;
         default:
            msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
            return( -1 );
    }

    /* create our structure that will contains all data */
    if( !( p_input->p_demux_data = 
146
                p_demux = malloc( sizeof( demux_sys_t ) ) ) )
147 148 149 150
    {
        msg_Err( p_input, "out of memory" );
        return( -1 );
    }
151
    memset( p_demux, 0, sizeof( demux_sys_t ) );
152 153 154 155
    p_input->p_demux_data = p_demux;
       

    /* Now load all boxes ( except raw data ) */
156
    if( !MP4_BoxGetRoot( p_input, &p_demux->box_root ) )
157 158 159 160 161
    {
        msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
        return( -1 );
    }

162
    MP4_BoxDumpStructure( p_input, &p_demux->box_root );
163

164
    if( ( p_ftyp = MP4_BoxGet( &p_demux->box_root, "/ftyp" ) ) )
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188
    {
        switch( p_ftyp->data.p_ftyp->i_major_brand )
        {
            case( FOURCC_isom ):
                msg_Info( p_input, 
                          "ISO Media file (isom) version %d.",
                          p_ftyp->data.p_ftyp->i_minor_version );
                break;
            default:
                msg_Info( p_input,
                          "Unrecognize major file specification (%c%c%c%c).",
                           p_ftyp->data.p_ftyp->i_major_brand&0xff,
                           ( p_ftyp->data.p_ftyp->i_major_brand >>  8)&0xff,
                           ( p_ftyp->data.p_ftyp->i_major_brand >> 16 )&0xff,
                           ( p_ftyp->data.p_ftyp->i_major_brand >> 24 )&0xff );
                break;
        }
    }
    else
    {
        msg_Info( p_input, "File Type box missing(assume ISO Media file)" );
    }

    /* the file need to have one moov box */
189
    if( MP4_BoxCount( &p_demux->box_root, "/moov" ) != 1 )
190
    {
191 192 193
        msg_Err( p_input, 
                 "MP4 plugin discarded (%d moov box)",
                 MP4_BoxCount( &p_demux->box_root, "/moov" ) );
194 195 196 197
        MP4End( p_input );
        return( -1 );
    }

198
    if( !(p_mvhd = MP4_BoxGet( &p_demux->box_root, "/moov/mvhd" ) ) )
199
    {
200
        msg_Err( p_input, "cannot find /moov/mvhd !" );
201 202 203 204 205 206
        MP4End( p_input );
        return( -1 );
    }
    else
    {
        p_demux->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
207
        p_demux->i_duration = p_mvhd->data.p_mvhd->i_duration;
208 209
    }
    
210 211
    if( !( p_demux->i_tracks = 
                MP4_BoxCount( &p_demux->box_root, "/moov/trak" ) ) )
212
    {
213
        msg_Err( p_input, "cannot find any /moov/trak !" );
214 215 216
        MP4End( p_input );
        return( -1 );
    }
217 218 219
    msg_Dbg( p_input, "find %d track%c",
                        p_demux->i_tracks,
                        p_demux->i_tracks ? 's':' ' );
220 221 222 223 224 225 226

    /* allocate memory */
    p_demux->track = calloc( p_demux->i_tracks, sizeof( track_data_mp4_t ) );

    /* now process each track and extract all usefull informations */
    for( i = 0; i < p_demux->i_tracks; i++ )
    {
227
        p_trak = MP4_BoxGet( &p_demux->box_root, "/moov/trak[%d]", i );
228 229 230 231 232 233 234 235 236 237 238 239 240 241
        MP4_ParseTrack( p_input, &p_demux->track[i], p_trak );

        if( p_demux->track[i].b_ok )
        {
            char *psz_cat;
            switch( p_demux->track[i].i_cat )
            {
                case( VIDEO_ES ):
                    psz_cat = "video";
                    break;
                case( AUDIO_ES ):
                    psz_cat = "audio";
                    break;
                default:
242
                    psz_cat = "unknown";
243 244 245
                    break;
            }
            
246 247
            msg_Dbg( p_input, "adding track[Id 0x%x] %s (%s) language %c%c%c",
                            p_demux->track[i].i_track_ID,
248 249 250 251 252 253 254 255
                            psz_cat,
                            p_demux->track[i].b_enable ? "enable":"disable",
                            p_demux->track[i].i_language[0],
                            p_demux->track[i].i_language[1], 
                            p_demux->track[i].i_language[2] );
        }
        else
        {
256
            msg_Dbg( p_input, "ignoring track[Id 0x%x]", p_demux->track[i].i_track_ID );
257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277
        }

    }
  
    /*  create one program */
    vlc_mutex_lock( &p_input->stream.stream_lock );
    if( input_InitStream( p_input, 0 ) == -1)
    {
        vlc_mutex_unlock( &p_input->stream.stream_lock );
        msg_Err( p_input, "cannot init stream" );
        MP4End( p_input );
        return( -1 );
    }
    if( input_AddProgram( p_input, 0, 0) == NULL )
    {
        vlc_mutex_unlock( &p_input->stream.stream_lock );
        msg_Err( p_input, "cannot add program" );
        MP4End( p_input );
        return( -1 );
    }
    p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
278 279 280 281
    /* XXX beurk and beurk, see MP4Demux and MP4Seek */
    p_input->stream.i_mux_rate =  
        p_input->stream.p_selected_area->i_size / 50 / 
        ( p_demux->i_duration / p_demux->i_timescale );
282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303
    vlc_mutex_unlock( &p_input->stream.stream_lock );
   
    
    for( i = 0; i < p_demux->i_tracks; i++ )
    {
        /* start decoder for this track if enable by default*/
        if( p_demux->track[i].b_enable )
        {
            MP4_StartDecoder( p_input, &p_demux->track[i] );
        }
    }

    vlc_mutex_lock( &p_input->stream.stream_lock );
    p_input->stream.p_selected_program->b_is_ok = 1;
    vlc_mutex_unlock( &p_input->stream.stream_lock );
        
    return( 0 );    

}

/*****************************************************************************
 * MP4Demux: read packet and send them to decoders 
304 305
 *****************************************************************************
 * TODO check for newly selected track (ie audio upt to now )
306 307 308
 *****************************************************************************/
static int MP4Demux( input_thread_t *p_input )
{
309
    demux_sys_t *p_demux = p_input->p_demux_data;
310 311
    int i_track;

312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329
    /* XXX beurk, beuRK and BEURK, 
       but only way I've found to detect seek from interface */
    if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
    {
        mtime_t i_date;
        
        /* first wait for empty buffer, arbitrary time FIXME */
        msleep( DEFAULT_PTS_DELAY );
        /* *** calculate new date *** */

        i_date = (mtime_t)1000000 * 
                 (mtime_t)p_demux->i_duration /
                 (mtime_t)p_demux->i_timescale * 
                 (mtime_t)MP4_TellAbsolute( p_input ) /
                 (mtime_t)p_input->stream.p_selected_area->i_size;
        MP4Seek( p_input, i_date );
    }
    
330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391
    /* first wait for the good time to read a packet */
    input_ClockManageRef( p_input,
                          p_input->stream.p_selected_program,
                          p_demux->i_pcr );


    /* update pcr XXX in mpeg scale so in 90000 unit/s */
    p_demux->i_pcr = MP4_GetMoviePTS( p_demux ) * 9 / 100;
    

    /* we will read 100ms for each stream so ...*/
    p_demux->i_time += __MAX( p_demux->i_timescale / 10 , 1 );
    

    for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
    {
        if( ( !p_demux->track[i_track].b_ok )||
            ( !p_demux->track[i_track].p_es )||
            ( !p_demux->track[i_track].p_es->p_decoder_fifo )||
            ( MP4_GetTrackPTS( &p_demux->track[i_track] ) >=
                        MP4_GetMoviePTS( p_demux ) ) )
        {
            continue; /* no need to read something */
        }
        while( MP4_GetTrackPTS( &p_demux->track[i_track] ) <
                        MP4_GetMoviePTS( p_demux ) )
        {

            pes_packet_t *p_pes;

            /* read a sample */
            if( !MP4_ReadSample( p_input ,
                                 &p_demux->track[i_track],
                                 &p_pes ) )
            {
                break;
            }

            /* send it to decoder and update time of this track 
                 it also launch a new decoder if needed */
            MP4_DecodeSample( p_input ,
                              &p_demux->track[i_track],
                              p_pes );
        }

    }
    
    /* now check if all tracks are finished or unhandled*/
    
    for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
    {
        if( ( p_demux->track[i_track].b_ok )&&
            ( p_demux->track[i_track].i_sample < p_demux->track[i_track].i_sample_count )&&
            ( p_demux->track[i_track].p_es )&&
            ( p_demux->track[i_track].p_es->p_decoder_fifo ) )
        {
            return( 1 );
        }
    }

    return( 0 ); /* EOF */
}
392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411
/*****************************************************************************
 * MP4Seek: Got to i_date
 ******************************************************************************/
static int   MP4Seek     ( input_thread_t *p_input, mtime_t i_date )
{
    demux_sys_t *p_demux = p_input->p_demux_data;
    int i_track;

    /* First update update global time */
    p_demux->i_time = i_date * p_demux->i_timescale / 1000000;
    p_demux->i_pcr = __MAX( MP4_GetMoviePTS( p_demux ) - DEFAULT_PTS_DELAY,
                            0 ) * 9 / 100; 
    
    /* Now for each stream try to go to this time */
    for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
    {
        MP4_TrackSynchro( p_input, &p_demux->track[i_track] );
    }
    return( 1 );
}
412 413 414 415 416 417 418 419 420 421

/*****************************************************************************
 * MP4End: frees unused data
 *****************************************************************************/
static void __MP4End ( vlc_object_t * p_this )
{   
#define FREE( p ) \
    if( p ) { free( p ); } 
    int i_track;
    input_thread_t *  p_input = (input_thread_t *)p_this;
422
    demux_sys_t *p_demux = p_input->p_demux_data;
423 424
    
    msg_Dbg( p_input, "Freeing all memory" );
425
    MP4_BoxFree( p_input, &p_demux->box_root );
426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452
    for( i_track = 0; i_track < p_demux->i_tracks; i_track++ )
    {
        int i_chunk;
        for( i_chunk = 0; 
                i_chunk < p_demux->track[i_track].i_chunk_count; i_chunk++ )
        {
            if( p_demux->track[i_track].chunk )
            {
               FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_count_dts);
               FREE(p_demux->track[i_track].chunk[i_chunk].p_sample_delta_dts );
            }
        }

        if( !p_demux->track[i_track].i_sample_size )
        {
            FREE( p_demux->track[i_track].p_sample_size );
        }
    }
    FREE( p_demux->track );
#undef FREE
}


/****************************************************************************
 * Local functions, specific to vlc
 ****************************************************************************/

453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562
/****************************************************************************
 * MP4_TrackSynchro : synchronize a track with movie time after seek or 
 *                    for newly selected track
 *****************************************************************************
 * TODO add support of Edit List (edts/elts) and Shadow Sync Sample(stsh)
 ****************************************************************************/
static int MP4_TrackSynchro( input_thread_t *p_input, track_data_mp4_t *p_track )
{
    demux_sys_t *p_demux = p_input->p_demux_data;
    int i_chunk_last;
    MP4_Box_t   *p_stss;

    if( !p_track->b_ok ||
        !p_track->p_es ||
        !p_track->p_es->p_decoder_fifo )
    {
        return( 0 );
    }
    p_track->i_sample = 0;
    i_chunk_last = p_track->i_chunk;
    p_track->i_chunk = 0;
    for( ;; )
    {
        if( p_track->i_sample >= p_track->i_sample_count )
        {
            msg_Warn( p_input, 
                        "track[Id 0x%x] will be disabled (seeking too far)",
                        p_track->i_track_ID );
            MP4_StopDecoder( p_input, p_track );
            break;
        }
        if( MP4_GetTrackPTS( p_track ) >= MP4_GetMoviePTS( p_demux ) )
        {
            break;
        }
        /* go one sample after */
        p_track->i_sample++;
        if( p_track->i_sample >= p_track->chunk[p_track->i_chunk].i_sample_first +
                p_track->chunk[p_track->i_chunk].i_sample_count )
        {
            p_track->i_chunk++;
        }
        
    }
    if( p_track->i_sample >= p_track->i_sample_count )
    {
        return( 0 );
    }

    /* *** Try to find nearest sync points *** */
    if( ( p_stss = MP4_BoxGet( p_track->p_stbl, "stss" ) ) )
    {
        int i_index;
        msg_Dbg( p_input, 
                    "track[Id 0x%x] using Sync Sample Box (stss)", 
                    p_track->i_track_ID );
        for( i_index = 0; i_index < p_stss->data.p_stss->i_entry_count; i_index++ )
        {
            if( p_stss->data.p_stss->i_sample_number[i_index] >= p_track->i_sample )
            {
                if( i_index > 0 )
                {
                    msg_Dbg( p_input, "stts gives %d --> %d (sample number)", 
                            p_track->i_sample, 
                            p_stss->data.p_stss->i_sample_number[i_index-1] );
                    p_track->i_sample = p_stss->data.p_stss->i_sample_number[i_index-1];
                    /* new track.i_sample is less than old so i_chunk can only decreased */
                    while( p_track->i_chunk > 0 && 
                            p_track->i_sample < p_track->chunk[p_track->i_chunk].i_sample_first )
                    {
                        p_track->i_chunk--;
                    }
                }
                else
                {
                    msg_Dbg( p_input, "stts gives %d --> %d (sample number)", 
                            p_track->i_sample, 
                            p_stss->data.p_stss->i_sample_number[i_index-1] );
                    p_track->i_sample = p_stss->data.p_stss->i_sample_number[i_index];
                    /* new track.i_sample is more than old so i_chunk can only increased */
                    while( p_track->i_chunk < p_track->i_chunk_count - 1 &&
                           p_track->i_sample >= p_track->chunk[p_track->i_chunk].i_sample_first +
                                                p_track->chunk[p_track->i_chunk].i_sample_count )
                    {
                        p_track->i_chunk++;
                    }
                }
                break;
            }
        }
    }
    else
    {
        msg_Dbg( p_input, 
                    "track[Id 0x%x] doesn't provided Sync Sample Box (stss)", 
                    p_track->i_track_ID );
    }

    /* *** If i_sample_description_index has changed restart decoder *** */
    if( p_track->chunk[i_chunk_last].i_sample_description_index !=
            p_track->chunk[p_track->i_chunk].i_sample_description_index )
    {
        msg_Warn( p_input,
                "SampleEntry has changed, restarting decoder" );
        MP4_StopDecoder( p_input, p_track );
        MP4_StartDecoder( p_input, p_track );
    }
    return( 1 );
}

563 564 565 566 567 568 569 570 571 572
/****************************************************************************
 * Parse track information and create all needed data to run a track
 * If it succeed b_ok is set to 1 else to 0
 ****************************************************************************/
static void MP4_ParseTrack( input_thread_t *p_input,
                     track_data_mp4_t *p_demux_track,
                     MP4_Box_t  * p_trak )
{
    int i;

573 574 575
    MP4_Box_t *p_tkhd = MP4_BoxGet( p_trak, "tkhd" );
    MP4_Box_t *p_tref = MP4_BoxGet( p_trak, "tref" );
    MP4_Box_t *p_elst;
576 577 578 579 580 581 582 583 584 585 586 587 588 589 590

    MP4_Box_t *p_mdhd;
    MP4_Box_t *p_hdlr;

    MP4_Box_t *p_vmhd;
    MP4_Box_t *p_smhd; 

    /* hint track unsuported */

    /* by default, track isn't usable */
    p_demux_track->b_ok = 0;

    /* by default, we don't known the categorie */
    p_demux_track->i_cat = UNKNOWN_ES;
    
591
    if( !p_tkhd )
592 593 594 595 596
    {
        return;
    }

    /* do we launch this track by default ? */
597 598
    p_demux_track->b_enable = 
        ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
599 600 601 602 603

    p_demux_track->i_track_ID = p_tkhd->data.p_tkhd->i_track_ID;
    p_demux_track->i_width = p_tkhd->data.p_tkhd->i_width / 65536;
    p_demux_track->i_height = p_tkhd->data.p_tkhd->i_height / 65536;
    
604
    if( ( p_elst = MP4_BoxGet( p_trak, "edts/elst" ) ) )
605
    {
606
/*        msg_Warn( p_input, "Unhandled box: edts --> FIXME" ); */
607 608
    }

609
    if( p_tref )
610
    {
611
/*        msg_Warn( p_input, "Unhandled box: tref --> FIXME" ); */
612 613
    } 

614 615
    p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
    p_hdlr = MP4_BoxGet( p_trak, "mdia/hdlr" );
616
    
617
    if( ( !p_mdhd )||( !p_hdlr ) )
618 619 620 621 622 623 624 625 626 627
    {
        return;
    }

    p_demux_track->i_timescale = p_mdhd->data.p_mdhd->i_timescale;

    for( i = 0; i < 3; i++ ) 
    {
        p_demux_track->i_language[i] = p_mdhd->data.p_mdhd->i_language[i];
    }
628
    p_mdhd->data.p_mdhd->i_language[3] = 0;
629 630 631 632
    
    switch( p_hdlr->data.p_hdlr->i_handler_type )
    {
        case( FOURCC_soun ):
633
            if( !( p_smhd = MP4_BoxGet( p_trak, "mdia/minf/smhd" ) ) )
634 635 636 637 638 639 640
            {
                return;
            }
            p_demux_track->i_cat = AUDIO_ES;
            break;

        case( FOURCC_vide ):
641
            if( !( p_vmhd = MP4_BoxGet( p_trak, "mdia/minf/vmhd" ) ) )
642 643 644 645 646 647 648 649 650
            {
                return;
            }
            p_demux_track->i_cat = VIDEO_ES;
            break;
            
        default:
            return;
    }
651 652 653
/*  TODO
    add support for:
    p_dinf = MP4_BoxGet( p_minf, "dinf" );
654
*/
655
    if( !( p_demux_track->p_stbl = MP4_BoxGet( p_trak,"mdia/minf/stbl" ) ) )
656 657 658 659
    {
        return;
    }
    
660
    if( !( p_demux_track->p_stsd = MP4_BoxGet( p_trak,"mdia/minf/stbl/stsd") ) )
661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692
    {
        return;
    }
    
    /* Create chunk  index table */
    if( !MP4_CreateChunksIndex( p_input,p_demux_track  ) )
    {
        return; /* cannot create chunks index */
    }
    
    /* create sample index table needed for reading and seeking */
    if( !MP4_CreateSamplesIndex( p_input, p_demux_track ) )
    {
        return; /* cannot create samples index */
    }
     
    p_demux_track->b_ok = 1;        
}
                     


/* now create basic chunk data, the rest will be filled by MP4_CreateSamplesIndex */
static int MP4_CreateChunksIndex( input_thread_t *p_input,
                                   track_data_mp4_t *p_demux_track )
{
    MP4_Box_t *p_co64; /* give offset for each chunk, same for stco and co64 */
    MP4_Box_t *p_stsc;

    int i_chunk;
    int i_index, i_last;
   

693 694 695
    if( ( !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "stco" ) )&&
          !(p_co64 = MP4_BoxGet( p_demux_track->p_stbl, "co64" ) ) )|| 
        ( !(p_stsc = MP4_BoxGet( p_demux_track->p_stbl, "stsc" ) ) ))
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749
    {
        return( 0 );
    }
     
    p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
    if( !p_demux_track->i_chunk_count )
    {
        msg_Warn( p_input, "No chunk defined" );
        return( 0 );
    }
    p_demux_track->chunk = calloc( p_demux_track->i_chunk_count, 
                                   sizeof( chunk_data_mp4_t ) );

    /* first we read chunk offset */
    for( i_chunk = 0; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
    {
        p_demux_track->chunk[i_chunk].i_offset = 
                p_co64->data.p_co64->i_chunk_offset[i_chunk];
    }

    /* now we read index for SampleEntry( soun vide mp4a mp4v ...) 
        to be used for the sample XXX begin to 1 
        We construct it begining at the end */
    i_last = p_demux_track->i_chunk_count; /* last chunk proceded */
    i_index = p_stsc->data.p_stsc->i_entry_count;
    if( !i_index )
    {
        msg_Warn( p_input, "cannot read chunk table or table empty" );
        return( 0 );
    }

    while( i_index )
    {
        i_index--;
        for( i_chunk = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
                i_chunk < i_last; i_chunk++ )
        {
            p_demux_track->chunk[i_chunk].i_sample_description_index = 
                    p_stsc->data.p_stsc->i_sample_description_index[i_index];
            p_demux_track->chunk[i_chunk].i_sample_count =
                    p_stsc->data.p_stsc->i_samples_per_chunk[i_index];
        }
        i_last = p_stsc->data.p_stsc->i_first_chunk[i_index] - 1;
    }

    p_demux_track->chunk[i_chunk].i_sample_first = 0;
    for( i_chunk = 1; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
    {
        p_demux_track->chunk[i_chunk].i_sample_first =
            p_demux_track->chunk[i_chunk-1].i_sample_first + 
                p_demux_track->chunk[i_chunk-1].i_sample_count;
        
    }
    
750 751 752 753
    msg_Dbg( p_input, 
             "track[Id 0x%x] read %d chunk",
             p_demux_track->i_track_ID,
            p_demux_track->i_chunk_count );
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770
    return( 1 );

}



static int MP4_CreateSamplesIndex( input_thread_t *p_input,
                                   track_data_mp4_t *p_demux_track )
{
    MP4_Box_t *p_stts; /* makes mapping between sample and decoding time,
                          ctts make same mapping but for composition time, 
                          not yet used and probably not usefull */
    MP4_Box_t *p_stsz; /* gives sample size of each samples, there is also stz2 
                          that uses a compressed form FIXME make them in libmp4 
                          as a unique type */
    /* TODO use also stss and stsh table for seeking */
    /* FIXME use edit table */
771 772
    int64_t i_sample;
    int64_t i_chunk;
773

774 775
    int64_t i_index;
    int64_t i_index_sample_used;
776

777
    int64_t i_last_dts; 
778
    
779 780
    p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
    p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803

    
    if( ( !p_stts )||( !p_stsz ) )
    {
        msg_Warn( p_input, "cannot read sample table" );
        return( 0 ); 
    }
        
    p_demux_track->i_sample_count = p_stsz->data.p_stsz->i_sample_count;


    /* for sample size, there are 2 case */
    if( p_stsz->data.p_stsz->i_sample_size )
    {
        /* 1: all sample have the same size, so no need to construct a table */
        p_demux_track->i_sample_size = p_stsz->data.p_stsz->i_sample_size;
        p_demux_track->p_sample_size = NULL;
    }
    else
    {
        /* 2: each sample can have a different size */
        p_demux_track->i_sample_size = 0;
        p_demux_track->p_sample_size = 
804
            calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820
        
        for( i_sample = 0; i_sample < p_demux_track->i_sample_count; i_sample++ )
        {
            p_demux_track->p_sample_size[i_sample] = 
                    p_stsz->data.p_stsz->i_entry_size[i_sample];
        }
    }
    /* we have extract all information from stsz,
        now use stts */

    /* if we don't want to waste too much memory, we can't expand
       the box !, so each chunk will contain an "extract" of this table 
       for fast research */
        
    i_last_dts = 0;
    i_index = 0; i_index_sample_used =0;
821

822 823 824 825
    /* create and init last data for each chunk */
    for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
    {

826
        int64_t i_entry, i_sample_count, i;
827 828 829 830 831 832
        /* save last dts */
        p_demux_track->chunk[i_chunk].i_first_dts = i_last_dts;
    /* count how many entries needed for this chunk 
       for p_sample_delta_dts and p_sample_count_dts */

        i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
833 834

        i_entry = 0;
835 836 837 838 839 840 841 842 843 844
        while( i_sample_count > 0 )
        {
            i_sample_count -= p_stts->data.p_stts->i_sample_count[i_index+i_entry];
            if( i_entry == 0 )
            {
                i_sample_count += i_index_sample_used; /* don't count already used sample 
                                                   int this entry */
            }
            i_entry++;
        }
845

846 847
        /* allocate them */
        p_demux_track->chunk[i_chunk].p_sample_count_dts = 
848
            calloc( i_entry, sizeof( uint32_t ) );
849
        p_demux_track->chunk[i_chunk].p_sample_delta_dts =
850
            calloc( i_entry, sizeof( uint32_t ) );
851 852 853 854 855

        /* now copy */
        i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
        for( i = 0; i < i_entry; i++ )
        {
856 857
            int64_t i_used;
            int64_t i_rest;
858 859 860 861 862 863
            
            i_rest = p_stts->data.p_stts->i_sample_count[i_index] - i_index_sample_used;

            i_used = __MIN( i_rest, i_sample_count );

            i_index_sample_used += i_used;
864
            i_sample_count -= i_used;
865 866 867 868 869 870 871 872 873 874 875 876

            p_demux_track->chunk[i_chunk].p_sample_count_dts[i] = i_used;

            p_demux_track->chunk[i_chunk].p_sample_delta_dts[i] =
                        p_stts->data.p_stts->i_sample_delta[i_index];
            
            i_last_dts += i_used * 
                    p_demux_track->chunk[i_chunk].p_sample_delta_dts[i];

            if( i_index_sample_used >=
                             p_stts->data.p_stts->i_sample_count[i_index] )
            {
877

878 879 880 881 882 883 884
                i_index++;
                i_index_sample_used = 0;
            }
        }
        
    }

885
    msg_Dbg( p_input, 
886
             "track[Id 0x%x] read %d samples length:"I64Fd"s", 
887
             p_demux_track->i_track_ID,
888 889
             p_demux_track->i_sample_count,
             i_last_dts / p_demux_track->i_timescale );
890 891 892 893 894 895 896

    return( 1 );
}

static void MP4_StartDecoder( input_thread_t *p_input,
                                 track_data_mp4_t *p_demux_track )
{
897 898 899
    MP4_Box_t   *p_sample;
    int         i;
    int         i_chunk;
900

901 902
    int         i_decoder_specific_info_len;
    uint8_t     *p_decoder_specific_info;
903
    
904
    uint8_t     *p_init;
905
 
906
    MP4_Box_t   *p_esds;
907 908 909 910 911 912 913

    
    if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
    {
        return;
    }
    
914
    msg_Dbg( p_input, "Starting decoder for track[Id 0x%x]",
915 916 917 918 919 920 921 922
                      p_demux_track->i_track_ID );

    /* launch decoder according in chunk we are */
    i_chunk = p_demux_track->i_chunk;

    if( !p_demux_track->chunk[i_chunk].i_sample_description_index )
    {
        msg_Warn( p_input, 
923
                  "invalid SampleEntry index (track[Id 0x%x])",
924 925 926
                  p_demux_track->i_track_ID );
        return;
    } 
927 928 929
    p_sample = MP4_BoxGet(  p_demux_track->p_stsd, 
                            "[%d]", 
                p_demux_track->chunk[i_chunk].i_sample_description_index - 1 );
930 931 932 933

    if( ( !p_sample )||( !p_sample->data.p_data ) )
    {
        msg_Warn( p_input, 
934
                  "cannot find SampleEntry (track[Id 0x%x])",
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
                  p_demux_track->i_track_ID );
        return;
    }

    vlc_mutex_lock( &p_input->stream.stream_lock );
    p_demux_track->p_es = input_AddES( p_input,
                                       p_input->stream.p_selected_program, 
                                       p_demux_track->i_track_ID,
                                       0 );
    vlc_mutex_unlock( &p_input->stream.stream_lock );
    /* Initialise ES, first language as description */
    for( i = 0; i < 3; i++ )
    {
        p_demux_track->p_es->psz_desc[i] = p_demux_track->i_language[i];
    }
950
    p_demux_track->p_es->psz_desc[3] = '\0';
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
    
    p_demux_track->p_es->i_stream_id = p_demux_track->i_track_ID;

    /* It's a little ugly but .. there are special cases */
    switch( p_sample->i_type )
    {
        case( VLC_FOURCC( '.', 'm', 'p', '3' ) ):
        case( VLC_FOURCC( 'm', 's', 0x00, 0x55 ) ):
            p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm', 'p', 'g', 'a' );
            break;
        default:
            p_demux_track->p_es->i_fourcc = p_sample->i_type;
            break;
    }
    
    p_demux_track->p_es->i_cat = p_demux_track->i_cat;
    
    i_decoder_specific_info_len = 0;
    p_decoder_specific_info = NULL;

    /* now see if esds is present and if so create a data packet 
        with decoder_specific_info  */
#define p_decconfig p_esds->data.p_esds->es_descriptor.p_decConfigDescr
974
    if( ( p_esds = MP4_BoxGet( p_sample, "esds" ) )&&
975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994
        ( p_esds->data.p_esds )&&
        ( p_decconfig ) )
    {
        /* First update information based on i_objectTypeIndication */
        switch( p_decconfig->i_objectTypeIndication )
        {
            case( 0x20 ): /* MPEG4 VIDEO */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','v' );
                break;
            case( 0x40):
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','a' );
                break;
            case( 0x60):
            case( 0x61):
            case( 0x62):
            case( 0x63):
            case( 0x64):
            case( 0x65): /* MPEG2 video */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
                break;
995
            /* Theses are MPEG2-AAC */
996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016
            case( 0x66): /* main profile */
            case( 0x67): /* Low complexity profile */
            case( 0x68): /* Scaleable Sampling rate profile */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','4','a' );
                break;
            /* true MPEG 2 audio */
            case( 0x69): 
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','a' );
                break;
            case( 0x6a): /* MPEG1 video */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','v' );
                break;
            case( 0x6b): /* MPEG1 audio */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'm','p','g','a' );
                break;
            case( 0x6c ): /* jpeg */
                p_demux_track->p_es->i_fourcc = VLC_FOURCC( 'j','p','e','g' );
                break;
            default:
                /* Unknown entry, but don't touch i_fourcc */
                msg_Warn( p_input, 
1017
                          "objectTypeIndication(0x%x) unknow (Track[ID 0x%x])",
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108
                          p_decconfig->i_objectTypeIndication,
                          p_demux_track->i_track_ID );
                break;
        }
        i_decoder_specific_info_len = 
                p_decconfig->i_decoder_specific_info_len;
        p_decoder_specific_info = 
                p_decconfig->p_decoder_specific_info;
    }

#undef p_decconfig

    /* some last initialisation */
    /* XXX I create a bitmapinfoheader_t or 
       waveformatex_t for each stream, up to now it's the best thing 
       I've found but it could exist a better solution :) as something 
       like adding some new fields in p_es ...

       XXX I don't set all values, only thoses that are interesting or known
        --> bitmapinfoheader_t : width and height 
        --> waveformatex_t : channels, samplerate, bitspersample
        and at the end I add p_decoder_specific_info 
        
        TODO set more values
     
     */

    switch( p_demux_track->i_cat )
    {
        case( VIDEO_ES ):    
            /* now create a bitmapinfoheader_t for decoder and 
               add information found in p_esds */
            p_init = malloc( 40 + i_decoder_specific_info_len);
            memset( p_init, 0, 40 + i_decoder_specific_info_len);
            MP4_Set4BytesLE( p_init, 40 + i_decoder_specific_info_len );
            if( p_sample->data.p_sample_vide->i_width )
            {
                MP4_Set4BytesLE( p_init + 4, 
                                 p_sample->data.p_sample_vide->i_width );
            }
            else
            {
                /* use display size */
                MP4_Set4BytesLE( p_init + 4, p_demux_track->i_width );
            }
            if( p_sample->data.p_sample_vide->i_height )
            {
                MP4_Set4BytesLE( p_init + 8, 
                                 p_sample->data.p_sample_vide->i_height );
            }
            else
            {
                MP4_Set4BytesLE( p_init + 8, p_demux_track->i_height );
            }
            if( i_decoder_specific_info_len )
            {
                memcpy( p_init + 40, 
                        p_decoder_specific_info,
                        i_decoder_specific_info_len);
            }
            break;

        case( AUDIO_ES ):
            p_init = malloc( 18 + i_decoder_specific_info_len);
            memset( p_init, 0, 18 + i_decoder_specific_info_len);
            MP4_Set2BytesLE( p_init + 2, /* i_channel */
                             p_sample->data.p_sample_soun->i_channelcount );
            MP4_Set4BytesLE( p_init + 4, /* samplepersec */
                             p_sample->data.p_sample_soun->i_sampleratehi );
            MP4_Set4BytesLE( p_init + 8, /* avgbytespersec */
                             p_sample->data.p_sample_soun->i_channelcount *
                                p_sample->data.p_sample_soun->i_sampleratehi *
                             (p_sample->data.p_sample_soun->i_samplesize/8) );
            MP4_Set2BytesLE( p_init + 14, /* bits/sample */
                             p_sample->data.p_sample_soun->i_samplesize );

            MP4_Set2BytesLE( p_init + 16, /* i_size, specific info len*/
                             i_decoder_specific_info_len );
            if( i_decoder_specific_info_len )
            {
                memcpy( p_init + 18, 
                        p_decoder_specific_info,
                        i_decoder_specific_info_len);
            }
            break;

        default:
            p_init = NULL;
            break;
    }

1109
    p_demux_track->p_es->p_demux_data = (es_sys_t *)p_init;
1110 1111 1112 1113 1114
    vlc_mutex_lock( &p_input->stream.stream_lock );
    input_SelectES( p_input, p_demux_track->p_es );
    vlc_mutex_unlock( &p_input->stream.stream_lock );

    p_demux_track->b_ok = 1;
1115
    p_demux_track->b_selected = 1;
1116 1117 1118 1119 1120
}

static void MP4_StopDecoder( input_thread_t *p_input,
                             track_data_mp4_t *p_demux_track )
{
1121
    msg_Dbg( p_input, "Stopping decoder (track[Id 0x%x])",
1122 1123 1124 1125
                      p_demux_track->i_track_ID );

    input_UnselectES( p_input, p_demux_track->p_es );
    p_demux_track->p_es = NULL;
1126 1127

    p_demux_track->b_selected = 0;
1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
}

static int  MP4_ReadSample( input_thread_t *p_input,
                            track_data_mp4_t *p_demux_track,
                            pes_packet_t **pp_pes )
{
    int i_size;
    off_t i_pos;

    data_packet_t *p_data;


    /* this track have already reach the end */
    if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
    {
        *pp_pes = NULL;
        return( 0 );
    }
    /* caculate size and position for this sample */
    i_size = p_demux_track->i_sample_size ? 
                    p_demux_track->i_sample_size : 
                    p_demux_track->p_sample_size[p_demux_track->i_sample];
1150

1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
    i_pos  = MP4_GetTrackPos( p_demux_track );

    /* go,go go ! */
    if( ! MP4_SeekAbsolute( p_input, i_pos ) )
    {
        return( 0 );
    }

    /* now create a pes */
    if( !(*pp_pes = input_NewPES( p_input->p_method_data ) ) )
    {
        return( 0 );
    }
    /* and a data packet for the data */
    if( !(p_data = input_NewPacket( p_input->p_method_data, i_size ) ) )
    {
        input_DeletePES( p_input->p_method_data, *pp_pes );
        *pp_pes = NULL;
        return( 0 );
    }
    
    /* initialisation of all the field */
    (*pp_pes)->i_dts =
        (*pp_pes)->i_pts = MP4_GetTrackPTS( p_demux_track );
    (*pp_pes)->p_first = (*pp_pes)->p_last  = p_data;
    (*pp_pes)->i_nb_data = 1;
    (*pp_pes)->i_pes_size = i_size;

    if( !i_size )    
    {
        return( 1 );
    }
    
1184
/*    msg_Dbg( p_input, "will read %d bytes", i_size ); */
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
    if( !MP4_ReadData( p_input, p_data->p_payload_start, i_size ) )
    {
        input_DeletePES( p_input->p_method_data, *pp_pes );
        input_DeletePacket( p_input->p_method_data, p_data );
        return( 0 );
    }

	return( 1 );
}


static int  MP4_DecodeSample( input_thread_t *p_input,
                              track_data_mp4_t *p_demux_track,
                              pes_packet_t *p_pes )
{

    if( !p_pes )
    {
        return( 0 );
    }

    /* don't forget to convert in mpeg clock */
    /* FIXME correct ffmpeg to use dts instead of pts that it incorrect 
       and, set it here ( and correct avi demux ) */
    p_pes->i_dts =
        p_pes->i_pts = input_ClockGetTS( p_input,
                                         p_input->stream.p_selected_program,
                                         p_pes->i_pts * 9/100);

    
    input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes );
    
    /* now update sample position */
    p_demux_track->i_sample++; /* easy ;) */
    if( p_demux_track->i_sample >= p_demux_track->i_sample_count )
    {
        /* we have reach end of the track so free decoder stuff */
        MP4_StopDecoder( p_input, p_demux_track );
        return( 1 );
    }
    /* Have we changed chunk ? */
    if( p_demux_track->i_sample >=
            p_demux_track->chunk[p_demux_track->i_chunk].i_sample_first +
                p_demux_track->chunk[p_demux_track->i_chunk].i_sample_count )
    {
        /* we haven't reached the end of the track, so see if we 
           have to change the decoder for the next frame because 
1232
           i_sample_description_index has changed */
1233 1234 1235 1236 1237 1238 1239

        p_demux_track->i_chunk++;
        if( p_demux_track->chunk[p_demux_track->i_chunk-1].i_sample_description_index 
              != p_demux_track->chunk[p_demux_track->i_chunk].i_sample_description_index  )
        {
            /* FIXME */
            msg_Warn( p_input, 
1240
                      "SampleEntry has changed, starting a new decoder" );
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251
            MP4_StopDecoder( p_input, p_demux_track );
            MP4_StartDecoder( p_input, p_demux_track );
        }
    }

    
    return( 1 );
}