mp4.c 43.3 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 1.16 2003/01/28 16:57:28 sam Exp $
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 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 *
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 * 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.
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 *
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 * 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();

/*****************************************************************************
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 * Declaration of local function
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 *****************************************************************************/
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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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{
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    input_thread_t  *p_input = (input_thread_t *)p_this;
    uint8_t         *p_peek;
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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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    unsigned 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 );
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    }
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    /* 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 );
    }
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    switch( VLC_FOURCC( p_peek[4], p_peek[5], p_peek[6], p_peek[7] ) )
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    {
        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 */
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    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;
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    /* 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 ):
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                msg_Dbg( p_input, 
                         "ISO Media file (isom) version %d.",
                         p_ftyp->data.p_ftyp->i_minor_version );
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                break;
            default:
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                msg_Dbg( p_input,
                         "unrecognized 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 );
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                break;
        }
    }
    else
    {
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        msg_Dbg( p_input, "file type box missing (assuming ISO Media file)" );
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    }

    /* 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, 
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                 "MP4 plugin discarded (%d moov boxes)",
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                 MP4_BoxCount( &p_demux->box_root, "/moov" ) );
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//        MP4End( p_input );
//        return( -1 );
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    }

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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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        }

    }
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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 )
    {
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        p_input->stream.i_mux_rate =
            p_input->stream.p_selected_area->i_size / 50 /
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            ( 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 );
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    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 );
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    return( 0 );
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}

/*****************************************************************************
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 * 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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    unsigned 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;
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    unsigned int i_track;
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    /* 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 )
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{
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#define FREE( p ) \
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    if( p ) { free( p ); }
    unsigned int i_track;
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    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++ )
    {
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        unsigned int i_chunk;
        for( i_chunk = 0;
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                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 );
            }
        }
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        FREE( p_demux->track[i_track].chunk );
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        if( !p_demux->track[i_track].i_sample_size )
        {
            FREE( p_demux->track[i_track].p_sample_size );
        }
    }
    FREE( p_demux->track );
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    FREE( p_input->p_demux_data );
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#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;
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    unsigned int i_chunk_last;
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    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" ) ) )
    {
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        unsigned int i_index;
        msg_Dbg( p_input,
                    "track[Id 0x%x] using Sync Sample Box (stss)",
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                    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, 
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                    "track[Id 0x%x] does not provide Sync Sample Box (stss)", 
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                    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 )
{
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    unsigned 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" ); */
616 617
    }

618
    if( p_tref )
619
    {
620
/*        msg_Warn( p_input, "unhandled box: tref --> FIXME" ); */
621 622
    } 

623 624
    p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
    p_hdlr = MP4_BoxGet( p_trak, "mdia/hdlr" );
625
    
626
    if( ( !p_mdhd )||( !p_hdlr ) )
627 628 629 630 631 632 633 634 635 636
    {
        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];
    }
637
    p_mdhd->data.p_mdhd->i_language[3] = 0;
638 639 640 641
    
    switch( p_hdlr->data.p_hdlr->i_handler_type )
    {
        case( FOURCC_soun ):
642
            if( !( p_smhd = MP4_BoxGet( p_trak, "mdia/minf/smhd" ) ) )
643 644 645 646 647 648 649
            {
                return;
            }
            p_demux_track->i_cat = AUDIO_ES;
            break;

        case( FOURCC_vide ):
650
            if( !( p_vmhd = MP4_BoxGet( p_trak, "mdia/minf/vmhd" ) ) )
651 652 653 654 655 656 657 658 659
            {
                return;
            }
            p_demux_track->i_cat = VIDEO_ES;
            break;
            
        default:
            return;
    }
660 661 662
/*  TODO
    add support for:
    p_dinf = MP4_BoxGet( p_minf, "dinf" );
663
*/
664
    if( !( p_demux_track->p_stbl = MP4_BoxGet( p_trak,"mdia/minf/stbl" ) ) )
665 666 667 668
    {
        return;
    }
    
669
    if( !( p_demux_track->p_stsd = MP4_BoxGet( p_trak,"mdia/minf/stbl/stsd") ) )
670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
    {
        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;

698 699
    unsigned int i_chunk;
    unsigned int i_index, i_last;
700 701
   

702 703 704
    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" ) ) ))
705 706 707 708 709 710 711
    {
        return( 0 );
    }
     
    p_demux_track->i_chunk_count = p_co64->data.p_co64->i_entry_count;
    if( !p_demux_track->i_chunk_count )
    {
712
        msg_Warn( p_input, "no chunk defined" );
713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
        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;
        
    }
    
759 760 761 762
    msg_Dbg( p_input, 
             "track[Id 0x%x] read %d chunk",
             p_demux_track->i_track_ID,
            p_demux_track->i_chunk_count );
763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
    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 */
780 781
    int64_t i_sample;
    int64_t i_chunk;
782

783 784
    int64_t i_index;
    int64_t i_index_sample_used;
785

786
    int64_t i_last_dts; 
787
    
788 789
    p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
    p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812

    
    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 = 
813
            calloc( p_demux_track->i_sample_count, sizeof( uint32_t ) );
814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829
        
        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;
830

831 832 833 834
    /* create and init last data for each chunk */
    for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
    {

835
        int64_t i_entry, i_sample_count, i;
836 837 838 839 840 841
        /* 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;
842 843

        i_entry = 0;
844 845 846 847 848 849 850 851 852 853
        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++;
        }
854

855 856
        /* allocate them */
        p_demux_track->chunk[i_chunk].p_sample_count_dts = 
857
            calloc( i_entry, sizeof( uint32_t ) );
858
        p_demux_track->chunk[i_chunk].p_sample_delta_dts =
859
            calloc( i_entry, sizeof( uint32_t ) );
860 861 862 863 864

        /* now copy */
        i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
        for( i = 0; i < i_entry; i++ )
        {
865 866
            int64_t i_used;
            int64_t i_rest;
867 868 869 870 871 872
            
            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;
873
            i_sample_count -= i_used;
874 875 876 877 878 879 880 881 882 883 884 885

            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] )
            {
886

887 888 889 890 891 892 893
                i_index++;
                i_index_sample_used = 0;
            }
        }
        
    }

894
    msg_Dbg( p_input, 
895
             "track[Id 0x%x] read %d samples length:"I64Fd"s", 
896
             p_demux_track->i_track_ID,
897 898
             p_demux_track->i_sample_count,
             i_last_dts / p_demux_track->i_timescale );
899 900 901 902 903 904 905

    return( 1 );
}

static void MP4_StartDecoder( input_thread_t *p_input,
                                 track_data_mp4_t *p_demux_track )
{
906 907 908
    MP4_Box_t *  p_sample;
    unsigned int i;
    unsigned int i_chunk;
909

910 911
    unsigned int i_decoder_specific_info_len;
    uint8_t *    p_decoder_specific_info;
912 913
    pes_packet_t *p_pes_init;

914 915
    uint8_t             *p_init;
    BITMAPINFOHEADER    *p_bih;
916
    WAVEFORMATEX        *p_wf;
917

918
    MP4_Box_t   *p_esds;
919

920

921 922 923 924
    if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
    {
        return;
    }
925

926
    msg_Dbg( p_input, "starting decoder for track[Id 0x%x]",
927 928 929 930 931 932 933 934
                      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, 
935
                  "invalid SampleEntry index (track[Id 0x%x])",
936 937 938
                  p_demux_track->i_track_ID );
        return;
    } 
939 940 941
    p_sample = MP4_BoxGet(  p_demux_track->p_stsd, 
                            "[%d]", 
                p_demux_track->chunk[i_chunk].i_sample_description_index - 1 );
942 943 944 945

    if( ( !p_sample )||( !p_sample->data.p_data ) )
    {
        msg_Warn( p_input, 
946
                  "cannot find SampleEntry (track[Id 0x%x])",
947 948 949 950 951 952 953 954 955 956 957 958 959 960 961
                  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];
    }
962
    p_demux_track->p_es->psz_desc[3] = '\0';
963

964 965 966 967 968 969 970 971 972 973 974 975 976
    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;
    }
977

978
    p_demux_track->p_es->i_cat = p_demux_track->i_cat;
979

980 981
    i_decoder_specific_info_len = 0;
    p_decoder_specific_info = NULL;
982
    p_pes_init = NULL;
983 984 985 986

    /* 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
987
    if( ( p_esds = MP4_BoxGet( p_sample, "esds" ) )&&
988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
        ( 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;
1008
            /* Theses are MPEG2-AAC */
1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
            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, 
1030
                          "unknown objectTypeIndication(0x%x) (Track[ID 0x%x])",
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052
                          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 
1053

1054
        TODO set more values
1055

1056 1057 1058 1059 1060 1061 1062
     */

    switch( p_demux_track->i_cat )
    {
        case( VIDEO_ES ):    
            /* now create a bitmapinfoheader_t for decoder and 
               add information found in p_esds */
1063 1064
            /* XXX XXX + 16 are for avoid segfault when ffmpeg access beyong the data */
            p_init = malloc( sizeof( BITMAPINFOHEADER ) + i_decoder_specific_info_len + 16 );
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079
            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 )
1080
            {
1081 1082
                // fall on display size
                p_bih->biWidth = p_demux_track->i_width;
1083
            }
1084
            if( p_bih->biHeight == 0 )
1085
            {
1086 1087
                // fall on display size
                p_bih->biHeight = p_demux_track->i_height;
1088
            }
1089

1090 1091
            if( i_decoder_specific_info_len )
            {
1092 1093
                data_packet_t   *p_data;

1094
                memcpy( p_init + sizeof( BITMAPINFOHEADER ), 
1095 1096
                        p_decoder_specific_info,
                        i_decoder_specific_info_len);
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119

                /* If stream is mpeg4 video we send specific_info,
                   as it's needed to decode it (vol) */
                switch( p_demux_track->p_es->i_fourcc )
                {
                    case VLC_FOURCC( 'm','p','4','v' ):
                    case VLC_FOURCC( 'D','I','V','X' ):
                    case VLC_FOURCC( 'd','i','v','x' ):
                        p_pes_init = input_NewPES( p_input->p_method_data );
                        p_data = input_NewPacket( p_input->p_method_data,
                                                  i_decoder_specific_info_len);
                        memcpy( p_data->p_payload_start,
                                p_decoder_specific_info,
                                i_decoder_specific_info_len );
                        p_pes_init->i_dts = p_pes_init->i_pts = 0;
                        p_pes_init->p_first = p_pes_init->p_last = p_data;
                        p_pes_init->i_nb_data = 1;
                        p_pes_init->i_pes_size = i_decoder_specific_info_len;
                        break;
                    default:
                        break;
                }

1120 1121 1122 1123
            }
            break;

        case( AUDIO_ES ):
1124
            p_init = malloc( sizeof( WAVEFORMATEX ) + i_decoder_specific_info_len + 16 );
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
            p_wf = (WAVEFORMATEX*)p_init;

            p_wf->wFormatTag = 0;
            p_wf->nChannels = p_sample->data.p_sample_soun->i_channelcount;
            p_wf->nSamplesPerSec = p_sample->data.p_sample_soun->i_sampleratehi;
            p_wf->nAvgBytesPerSec = 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;
            p_wf->nBlockAlign = 0;
            p_wf->wBitsPerSample = p_sample->data.p_sample_soun->i_samplesize;
            p_wf->cbSize = i_decoder_specific_info_len;

1137 1138
            if( i_decoder_specific_info_len )
            {
1139
                memcpy( p_init + sizeof( WAVEFORMATEX ),
1140 1141 1142
                        p_decoder_specific_info,
                        i_decoder_specific_info_len);
            }
1143

1144 1145 1146 1147 1148 1149
            break;

        default:
            p_init = NULL;
            break;
    }
1150 1151 1152 1153 1154 1155 1156 1157
    if( p_demux_track->i_cat == AUDIO_ES )
    {
        p_demux_track->p_es->p_waveformatex = (void*)p_init;
    }
    else if( p_demux_track->i_cat == VIDEO_ES )
    {
        p_demux_track->p_es->p_bitmapinfoheader = (void*)p_init;
    }
1158 1159 1160 1161
    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 );

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    if( !p_demux_track->p_es->p_decoder_fifo )
    {
        msg_Warn( p_input, "cannot start decoder" );
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        if( p_pes_init )
        {
            input_DeletePES( p_input->p_method_data, p_pes_init );
        }
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        return;
    }
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    if( p_pes_init != NULL )
    {
        input_DecodePES( p_demux_track->p_es->p_decoder_fifo, p_pes_init );
    }
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    p_demux_track->b_ok = 1;
1177
    p_demux_track->b_selected = 1;
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}

static void MP4_StopDecoder( input_thread_t *p_input,
                             track_data_mp4_t *p_demux_track )
{
1183
    msg_Dbg( p_input, "stopping decoder (track[Id 0x%x])",
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                      p_demux_track->i_track_ID );

    input_UnselectES( p_input, p_demux_track->p_es );
    p_demux_track->p_es = NULL;
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    p_demux_track->b_selected = 0;
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}

static int  MP4_ReadSample( input_thread_t *p_input,
                            track_data_mp4_t *p_demux_track,
                            pes_packet_t **pp_pes )
{
1196
    size_t i_size;
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    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];
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    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 );
    }
    
1246
/*    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 );
        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 
1293
           i_sample_description_index has changed */