mp4.c 41.7 KB
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/*****************************************************************************
 * mp4.c : MP4 file input module for vlc
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
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 * $Id: mp4.c,v 1.7 2002/11/26 17:28:22 fenrir Exp $
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 * 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>
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#include "codecs.h"
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#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 * );

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

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

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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 ) \
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    *((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 )
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#define MP4_Set2BytesLE( p, dw ) \
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    *((uint8_t*)p) = ( (dw)&0xff ); \
    *((uint8_t*)p+1) = ( ((dw)>> 8)&0xff )
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/*****************************************************************************
 * MP4Init: check file and initializes MP4 structures
 *****************************************************************************/
static int MP4Init( vlc_object_t * p_this )
{   
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    input_thread_t  *p_input = (input_thread_t *)p_this;
    uint8_t         *p_peek;
    uint32_t        i_type;
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    demux_sys_t     *p_demux;
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    MP4_Box_t       *p_ftyp;
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    MP4_Box_t       *p_mvhd;
    MP4_Box_t       *p_trak;
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    int             i;
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    /* 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 ):
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        case( FOURCC_udta ): 
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        case( FOURCC_free ):
        case( FOURCC_skip ):
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        case( FOURCC_wide ): 
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            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 = 
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                p_demux = malloc( sizeof( demux_sys_t ) ) ) )
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    {
        msg_Err( p_input, "out of memory" );
        return( -1 );
    }
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    memset( p_demux, 0, sizeof( demux_sys_t ) );
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    p_input->p_demux_data = p_demux;
       

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

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    MP4_BoxDumpStructure( p_input, &p_demux->box_root );
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    if( ( p_ftyp = MP4_BoxGet( &p_demux->box_root, "/ftyp" ) ) )
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    {
        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 */
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    if( MP4_BoxCount( &p_demux->box_root, "/moov" ) != 1 )
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    {
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        msg_Err( p_input, 
                 "MP4 plugin discarded (%d moov box)",
                 MP4_BoxCount( &p_demux->box_root, "/moov" ) );
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        MP4End( p_input );
        return( -1 );
    }

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    if( !(p_mvhd = MP4_BoxGet( &p_demux->box_root, "/moov/mvhd" ) ) )
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    {
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        msg_Err( p_input, "cannot find /moov/mvhd !" );
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        MP4End( p_input );
        return( -1 );
    }
    else
    {
        p_demux->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
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        p_demux->i_duration = p_mvhd->data.p_mvhd->i_duration;
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    }
    
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    if( !( p_demux->i_tracks = 
                MP4_BoxCount( &p_demux->box_root, "/moov/trak" ) ) )
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    {
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        msg_Err( p_input, "cannot find any /moov/trak !" );
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        MP4End( p_input );
        return( -1 );
    }
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    msg_Dbg( p_input, "find %d track%c",
                        p_demux->i_tracks,
                        p_demux->i_tracks ? 's':' ' );
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    /* 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++ )
    {
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        p_trak = MP4_BoxGet( &p_demux->box_root, "/moov/trak[%d]", i );
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        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:
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                    psz_cat = "unknown";
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                    break;
            }
            
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            msg_Dbg( p_input, "adding track[Id 0x%x] %s (%s) language %c%c%c",
                            p_demux->track[i].i_track_ID,
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                            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
        {
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            msg_Dbg( p_input, "ignoring track[Id 0x%x]", p_demux->track[i].i_track_ID );
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        }

    }
  
    /*  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];
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    /* XXX beurk and beurk, see MP4Demux and MP4Seek */
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    if( p_demux->i_duration/p_demux->i_timescale > 0 )
    {
        p_input->stream.i_mux_rate =  
            p_input->stream.p_selected_area->i_size / 50 / 
            ( p_demux->i_duration / p_demux->i_timescale );
    }
    else
    {
        p_input->stream.i_mux_rate = 0;
    }
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    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 
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 *****************************************************************************
 * TODO check for newly selected track (ie audio upt to now )
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 *****************************************************************************/
static int MP4Demux( input_thread_t *p_input )
{
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    demux_sys_t *p_demux = p_input->p_demux_data;
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    int i_track;

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    /* 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 );
    }
    
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    /* 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 */
}
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/*****************************************************************************
 * 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 );
}
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/*****************************************************************************
 * 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;
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    demux_sys_t *p_demux = p_input->p_demux_data;
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    msg_Dbg( p_input, "Freeing all memory" );
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    MP4_BoxFree( p_input, &p_demux->box_root );
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    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
 ****************************************************************************/

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/****************************************************************************
 * 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 );
}

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/****************************************************************************
 * 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;

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    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;
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    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;
    
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    if( !p_tkhd )
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    {
        return;
    }

    /* do we launch this track by default ? */
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    p_demux_track->b_enable = 
        ( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
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    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;
    
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    if( ( p_elst = MP4_BoxGet( p_trak, "edts/elst" ) ) )
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    {
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/*        msg_Warn( p_input, "Unhandled box: edts --> FIXME" ); */
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    }

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

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    p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
    p_hdlr = MP4_BoxGet( p_trak, "mdia/hdlr" );
623
    
624
    if( ( !p_mdhd )||( !p_hdlr ) )
625 626 627 628 629 630 631 632 633 634
    {
        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];
    }
635
    p_mdhd->data.p_mdhd->i_language[3] = 0;
636 637 638 639
    
    switch( p_hdlr->data.p_hdlr->i_handler_type )
    {
        case( FOURCC_soun ):
640
            if( !( p_smhd = MP4_BoxGet( p_trak, "mdia/minf/smhd" ) ) )
641 642 643 644 645 646 647
            {
                return;
            }
            p_demux_track->i_cat = AUDIO_ES;
            break;

        case( FOURCC_vide ):
648
            if( !( p_vmhd = MP4_BoxGet( p_trak, "mdia/minf/vmhd" ) ) )
649 650 651 652 653 654 655 656 657
            {
                return;
            }
            p_demux_track->i_cat = VIDEO_ES;
            break;
            
        default:
            return;
    }
658 659 660
/*  TODO
    add support for:
    p_dinf = MP4_BoxGet( p_minf, "dinf" );
661
*/
662
    if( !( p_demux_track->p_stbl = MP4_BoxGet( p_trak,"mdia/minf/stbl" ) ) )
663 664 665 666
    {
        return;
    }
    
667
    if( !( p_demux_track->p_stsd = MP4_BoxGet( p_trak,"mdia/minf/stbl/stsd") ) )
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    {
        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;
   

700 701 702
    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" ) ) ))
703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756
    {
        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;
        
    }
    
757 758 759 760
    msg_Dbg( p_input, 
             "track[Id 0x%x] read %d chunk",
             p_demux_track->i_track_ID,
            p_demux_track->i_chunk_count );
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    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 */
778 779
    int64_t i_sample;
    int64_t i_chunk;
780

781 782
    int64_t i_index;
    int64_t i_index_sample_used;
783

784
    int64_t i_last_dts; 
785
    
786 787
    p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
    p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810

    
    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 = 
811
            calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827
        
        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;
828

829 830 831 832
    /* create and init last data for each chunk */
    for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
    {

833
        int64_t i_entry, i_sample_count, i;
834 835 836 837 838 839
        /* 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;
840 841

        i_entry = 0;
842 843 844 845 846 847 848 849 850 851
        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++;
        }
852

853 854
        /* allocate them */
        p_demux_track->chunk[i_chunk].p_sample_count_dts = 
855
            calloc( i_entry, sizeof( uint32_t ) );
856
        p_demux_track->chunk[i_chunk].p_sample_delta_dts =
857
            calloc( i_entry, sizeof( uint32_t ) );
858 859 860 861 862

        /* now copy */
        i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
        for( i = 0; i < i_entry; i++ )
        {
863 864
            int64_t i_used;
            int64_t i_rest;
865 866 867 868 869 870
            
            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;
871
            i_sample_count -= i_used;
872 873 874 875 876 877 878 879 880 881 882 883

            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] )
            {
884

885 886 887 888 889 890 891
                i_index++;
                i_index_sample_used = 0;
            }
        }
        
    }

892
    msg_Dbg( p_input, 
893
             "track[Id 0x%x] read %d samples length:"I64Fd"s", 
894
             p_demux_track->i_track_ID,
895 896
             p_demux_track->i_sample_count,
             i_last_dts / p_demux_track->i_timescale );
897 898 899 900 901 902 903

    return( 1 );
}

static void MP4_StartDecoder( input_thread_t *p_input,
                                 track_data_mp4_t *p_demux_track )
{
904 905 906
    MP4_Box_t   *p_sample;
    int         i;
    int         i_chunk;
907

908 909
    int         i_decoder_specific_info_len;
    uint8_t     *p_decoder_specific_info;
910
    
911 912 913
    uint8_t             *p_init;
    BITMAPINFOHEADER    *p_bih;

914
    MP4_Box_t   *p_esds;
915 916 917 918 919 920 921

    
    if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
    {
        return;
    }
    
922
    msg_Dbg( p_input, "Starting decoder for track[Id 0x%x]",
923 924 925 926 927 928 929 930
                      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, 
931
                  "invalid SampleEntry index (track[Id 0x%x])",
932 933 934
                  p_demux_track->i_track_ID );
        return;
    } 
935 936 937
    p_sample = MP4_BoxGet(  p_demux_track->p_stsd, 
                            "[%d]", 
                p_demux_track->chunk[i_chunk].i_sample_description_index - 1 );
938 939 940 941

    if( ( !p_sample )||( !p_sample->data.p_data ) )
    {
        msg_Warn( p_input, 
942
                  "cannot find SampleEntry (track[Id 0x%x])",
943 944 945 946 947 948 949 950 951 952 953 954 955 956 957
                  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];
    }
958
    p_demux_track->p_es->psz_desc[3] = '\0';
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
    
    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
982
    if( ( p_esds = MP4_BoxGet( p_sample, "esds" ) )&&
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
        ( 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;
1003
            /* Theses are MPEG2-AAC */
1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024
            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, 
1025
                          "objectTypeIndication(0x%x) unknow (Track[ID 0x%x])",
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
                          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 */
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
            p_init = malloc( sizeof( BITMAPINFOHEADER ) + i_decoder_specific_info_len );
            p_bih = (BITMAPINFOHEADER*)p_init;

            p_bih->biSize     = sizeof( BITMAPINFOHEADER ) + i_decoder_specific_info_len;
            p_bih->biWidth    = p_sample->data.p_sample_vide->i_width;
            p_bih->biHeight   = p_sample->data.p_sample_vide->i_height;
            p_bih->biPlanes   = 1;      // FIXME
            p_bih->biBitCount = 0;      // FIXME
            p_bih->biCompression   = 0; // FIXME
            p_bih->biSizeImage     = 0; // FIXME
            p_bih->biXPelsPerMeter = 0; // FIXME
            p_bih->biYPelsPerMeter = 0; // FIXME
            p_bih->biClrUsed       = 0; // FIXME
            p_bih->biClrImportant  = 0; // FIXME

            if( p_bih->biWidth == 0 )
1074
            {
1075 1076
                // fall on display size
                p_bih->biWidth = p_demux_track->i_width;
1077
            }
1078
            if( p_bih->biHeight == 0 )
1079
            {
1080 1081
                // fall on display size
                p_bih->biHeight = p_demux_track->i_height;
1082
            }
1083
            
1084 1085
            if( i_decoder_specific_info_len )
            {
1086
                memcpy( p_init + sizeof( BITMAPINFOHEADER ), 
1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
                        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;
    }

1121
    p_demux_track->p_es->p_demux_data = (es_sys_t *)p_init;
1122 1123 1124 1125 1126
    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;
1127
    p_demux_track->b_selected = 1;
1128 1129 1130 1131 1132
}

static void MP4_StopDecoder( input_thread_t *p_input,
                             track_data_mp4_t *p_demux_track )
{
1133
    msg_Dbg( p_input, "Stopping decoder (track[Id 0x%x])",
1134 1135 1136 1137
                      p_demux_track->i_track_ID );

    input_UnselectES( p_input, p_demux_track->p_es );
    p_demux_track->p_es = NULL;
1138 1139

    p_demux_track->b_selected = 0;
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161
}

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];
1162

1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
    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 );
    }
    
1196
/*    msg_Dbg( p_input, "will read %d bytes", i_size ); */
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    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 
1244
           i_sample_description_index has changed */
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        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, 
1252
                      "SampleEntry has changed, starting a new decoder" );
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            MP4_StopDecoder( p_input, p_demux_track );
            MP4_StartDecoder( p_input, p_demux_track );
        }
    }

    
    return( 1 );
}