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vlc/modules/demux/mp4/mp4.c
Laurent Aimar 07dcfb3ffc * all: - fix a memory leak while parsing. 
- fix a bug while playing last frames (in last chunk).
        - add seek support, not complete but usable.
2002-09-17 11:57:38 +00:00

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/*****************************************************************************
* mp4.c : MP4 file input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: mp4.c,v 1.4 2002/09/17 11:57:38 fenrir Exp $
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
#include <errno.h>
#include <sys/types.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#include "libmp4.h"
#include "mp4.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int MP4Init ( vlc_object_t * );
static void __MP4End ( vlc_object_t * );
static int MP4Demux ( input_thread_t * );
/* New input could have something like that... */
static int MP4Seek ( input_thread_t *, mtime_t );
#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
*****************************************************************************/
static int MP4_TrackSynchro( input_thread_t *p_input, track_data_mp4_t *p_track );
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 ) \
*((u8*)p) = ( (dw)&0xff ); \
*((u8*)p+1) = ( ((dw)>> 8)&0xff ); \
*((u8*)p+2) = ( ((dw)>>16)&0xff ); \
*((u8*)p+3) = ( ((dw)>>24)&0xff )
#define MP4_Set2BytesLE( p, dw ) \
*((u8*)p) = ( (dw)&0xff ); \
*((u8*)p+1) = ( ((dw)>> 8)&0xff )
/*****************************************************************************
* MP4Init: check file and initializes MP4 structures
*****************************************************************************/
static int MP4Init( vlc_object_t * p_this )
{
input_thread_t *p_input = (input_thread_t *)p_this;
u8 *p_peek;
u32 i_type;
demux_sys_t *p_demux;
MP4_Box_t *p_ftyp;
MP4_Box_t *p_mvhd;
MP4_Box_t *p_trak;
int i;
/* 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 ):
case( FOURCC_udta ):
case( FOURCC_free ):
case( FOURCC_skip ):
case( FOURCC_wide ):
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 =
p_demux = malloc( sizeof( demux_sys_t ) ) ) )
{
msg_Err( p_input, "out of memory" );
return( -1 );
}
memset( p_demux, 0, sizeof( demux_sys_t ) );
p_input->p_demux_data = p_demux;
/* Now load all boxes ( except raw data ) */
if( !MP4_BoxGetRoot( p_input, &p_demux->box_root ) )
{
msg_Warn( p_input, "MP4 plugin discarded (not a valid file)" );
return( -1 );
}
MP4_BoxDumpStructure( p_input, &p_demux->box_root );
if( ( p_ftyp = MP4_BoxGet( &p_demux->box_root, "/ftyp" ) ) )
{
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 */
if( MP4_BoxCount( &p_demux->box_root, "/moov" ) != 1 )
{
msg_Err( p_input,
"MP4 plugin discarded (%d moov box)",
MP4_BoxCount( &p_demux->box_root, "/moov" ) );
MP4End( p_input );
return( -1 );
}
if( !(p_mvhd = MP4_BoxGet( &p_demux->box_root, "/moov/mvhd" ) ) )
{
msg_Err( p_input, "cannot find /moov/mvhd !" );
MP4End( p_input );
return( -1 );
}
else
{
p_demux->i_timescale = p_mvhd->data.p_mvhd->i_timescale;
p_demux->i_duration = p_mvhd->data.p_mvhd->i_duration;
}
if( !( p_demux->i_tracks =
MP4_BoxCount( &p_demux->box_root, "/moov/trak" ) ) )
{
msg_Err( p_input, "cannot find any /moov/trak !" );
MP4End( p_input );
return( -1 );
}
msg_Dbg( p_input, "find %d track%c",
p_demux->i_tracks,
p_demux->i_tracks ? 's':' ' );
/* 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++ )
{
p_trak = MP4_BoxGet( &p_demux->box_root, "/moov/trak[%d]", i );
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:
psz_cat = "unknown";
break;
}
msg_Dbg( p_input, "adding track[Id 0x%x] %s (%s) language %c%c%c",
p_demux->track[i].i_track_ID,
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
{
msg_Dbg( p_input, "ignoring track[Id 0x%x]", p_demux->track[i].i_track_ID );
}
}
/* 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];
/* XXX beurk and beurk, see MP4Demux and MP4Seek */
p_input->stream.i_mux_rate =
p_input->stream.p_selected_area->i_size / 50 /
( p_demux->i_duration / p_demux->i_timescale );
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
*****************************************************************************
* TODO check for newly selected track (ie audio upt to now )
*****************************************************************************/
static int MP4Demux( input_thread_t *p_input )
{
demux_sys_t *p_demux = p_input->p_demux_data;
int i_track;
/* 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 );
}
/* 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 */
}
/*****************************************************************************
* 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 );
}
/*****************************************************************************
* 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;
demux_sys_t *p_demux = p_input->p_demux_data;
msg_Dbg( p_input, "Freeing all memory" );
MP4_BoxFree( p_input, &p_demux->box_root );
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
****************************************************************************/
/****************************************************************************
* 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 );
}
/****************************************************************************
* 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;
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;
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;
if( !p_tkhd )
{
return;
}
/* do we launch this track by default ? */
p_demux_track->b_enable =
( ( p_tkhd->data.p_tkhd->i_flags&MP4_TRACK_ENABLED ) != 0 );
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;
if( ( p_elst = MP4_BoxGet( p_trak, "edts/elst" ) ) )
{
/* msg_Warn( p_input, "Unhandled box: edts --> FIXME" ); */
}
if( p_tref )
{
/* msg_Warn( p_input, "Unhandled box: tref --> FIXME" ); */
}
p_mdhd = MP4_BoxGet( p_trak, "mdia/mdhd" );
p_hdlr = MP4_BoxGet( p_trak, "mdia/hdlr" );
if( ( !p_mdhd )||( !p_hdlr ) )
{
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];
}
p_mdhd->data.p_mdhd->i_language[3] = 0;
switch( p_hdlr->data.p_hdlr->i_handler_type )
{
case( FOURCC_soun ):
if( !( p_smhd = MP4_BoxGet( p_trak, "mdia/minf/smhd" ) ) )
{
return;
}
p_demux_track->i_cat = AUDIO_ES;
break;
case( FOURCC_vide ):
if( !( p_vmhd = MP4_BoxGet( p_trak, "mdia/minf/vmhd" ) ) )
{
return;
}
p_demux_track->i_cat = VIDEO_ES;
break;
default:
return;
}
/* TODO
add support for:
p_dinf = MP4_BoxGet( p_minf, "dinf" );
*/
if( !( p_demux_track->p_stbl = MP4_BoxGet( p_trak,"mdia/minf/stbl" ) ) )
{
return;
}
if( !( p_demux_track->p_stsd = MP4_BoxGet( p_trak,"mdia/minf/stbl/stsd") ) )
{
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;
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" ) ) ))
{
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;
}
msg_Dbg( p_input,
"track[Id 0x%x] read %d chunk",
p_demux_track->i_track_ID,
p_demux_track->i_chunk_count );
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 */
int i_sample;
int i_chunk;
int i_index;
int i_index_sample_used;
u64 i_last_dts;
p_stts = MP4_BoxGet( p_demux_track->p_stbl, "stts" );
p_stsz = MP4_BoxGet( p_demux_track->p_stbl, "stsz" ); /* FIXME and stz2 */
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 =
calloc( p_demux_track->i_sample_count, sizeof( u32 ) );
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;
/* create and init last data for each chunk */
for(i_chunk = 0 ; i_chunk < p_demux_track->i_chunk_count; i_chunk++ )
{
int i_entry, i_sample_count, i;
/* 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_entry = 0;
i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
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++;
}
/* allocate them */
p_demux_track->chunk[i_chunk].p_sample_count_dts =
calloc( i_entry, sizeof( u32 ) );
p_demux_track->chunk[i_chunk].p_sample_delta_dts =
calloc( i_entry, sizeof( u32 ) );
/* now copy */
i_sample_count = p_demux_track->chunk[i_chunk].i_sample_count;
for( i = 0; i < i_entry; i++ )
{
int i_used;
int i_rest;
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;
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] )
{
i_index++;
i_index_sample_used = 0;
}
}
}
msg_Dbg( p_input,
"track[Id 0x%x] read %d samples",
p_demux_track->i_track_ID,
p_demux_track->i_sample_count );
return( 1 );
}
static void MP4_StartDecoder( input_thread_t *p_input,
track_data_mp4_t *p_demux_track )
{
MP4_Box_t *p_sample;
int i;
int i_chunk;
int i_decoder_specific_info_len;
u8 *p_decoder_specific_info;
u8 *p_init;
MP4_Box_t *p_esds;
if( (!p_demux_track->b_ok )||( p_demux_track->i_cat == UNKNOWN_ES ) )
{
return;
}
msg_Dbg( p_input, "Starting decoder for track[Id 0x%x]",
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,
"invalid SampleEntry index (track[Id 0x%x])",
p_demux_track->i_track_ID );
return;
}
p_sample = MP4_BoxGet( p_demux_track->p_stsd,
"[%d]",
p_demux_track->chunk[i_chunk].i_sample_description_index - 1 );
if( ( !p_sample )||( !p_sample->data.p_data ) )
{
msg_Warn( p_input,
"cannot find SampleEntry (track[Id 0x%x])",
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];
}
p_demux_track->p_es->psz_desc[3] = '\0';
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
if( ( p_esds = MP4_BoxGet( p_sample, "esds" ) )&&
( 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;
/* Theses are MPEG2-AAC */
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,
"objectTypeIndication(0x%x) unknow (Track[ID 0x%x])",
p_decconfig->i_objectTypeIndication,
p_demux_track->i_track_ID );
break;
}
i_decoder_specific_info_len =
p_decconfig->i_decoder_specific_info_len;
p_decoder_specific_info =
p_decconfig->p_decoder_specific_info;
}
#undef p_decconfig
/* some last initialisation */
/* XXX I create a bitmapinfoheader_t or
waveformatex_t for each stream, up to now it's the best thing
I've found but it could exist a better solution :) as something
like adding some new fields in p_es ...
XXX I don't set all values, only thoses that are interesting or known
--> bitmapinfoheader_t : width and height
--> waveformatex_t : channels, samplerate, bitspersample
and at the end I add p_decoder_specific_info
TODO set more values
*/
switch( p_demux_track->i_cat )
{
case( VIDEO_ES ):
/* now create a bitmapinfoheader_t for decoder and
add information found in p_esds */
p_init = malloc( 40 + i_decoder_specific_info_len);
memset( p_init, 0, 40 + i_decoder_specific_info_len);
MP4_Set4BytesLE( p_init, 40 + i_decoder_specific_info_len );
if( p_sample->data.p_sample_vide->i_width )
{
MP4_Set4BytesLE( p_init + 4,
p_sample->data.p_sample_vide->i_width );
}
else
{
/* use display size */
MP4_Set4BytesLE( p_init + 4, p_demux_track->i_width );
}
if( p_sample->data.p_sample_vide->i_height )
{
MP4_Set4BytesLE( p_init + 8,
p_sample->data.p_sample_vide->i_height );
}
else
{
MP4_Set4BytesLE( p_init + 8, p_demux_track->i_height );
}
if( i_decoder_specific_info_len )
{
memcpy( p_init + 40,
p_decoder_specific_info,
i_decoder_specific_info_len);
}
break;
case( AUDIO_ES ):
p_init = malloc( 18 + i_decoder_specific_info_len);
memset( p_init, 0, 18 + i_decoder_specific_info_len);
MP4_Set2BytesLE( p_init + 2, /* i_channel */
p_sample->data.p_sample_soun->i_channelcount );
MP4_Set4BytesLE( p_init + 4, /* samplepersec */
p_sample->data.p_sample_soun->i_sampleratehi );
MP4_Set4BytesLE( p_init + 8, /* avgbytespersec */
p_sample->data.p_sample_soun->i_channelcount *
p_sample->data.p_sample_soun->i_sampleratehi *
(p_sample->data.p_sample_soun->i_samplesize/8) );
MP4_Set2BytesLE( p_init + 14, /* bits/sample */
p_sample->data.p_sample_soun->i_samplesize );
MP4_Set2BytesLE( p_init + 16, /* i_size, specific info len*/
i_decoder_specific_info_len );
if( i_decoder_specific_info_len )
{
memcpy( p_init + 18,
p_decoder_specific_info,
i_decoder_specific_info_len);
}
break;
default:
p_init = NULL;
break;
}
p_demux_track->p_es->p_demux_data = (es_sys_t *)p_init;
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;
p_demux_track->b_selected = 1;
}
static void MP4_StopDecoder( input_thread_t *p_input,
track_data_mp4_t *p_demux_track )
{
msg_Dbg( p_input, "Stopping decoder (track[Id 0x%x])",
p_demux_track->i_track_ID );
input_UnselectES( p_input, p_demux_track->p_es );
p_demux_track->p_es = NULL;
p_demux_track->b_selected = 0;
}
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];
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 );
}
/* msg_Dbg( p_input, "will read %d bytes", i_size ); */
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
i_sample_description_index has changed */
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,
"SampleEntry has changed, starting a new decoder" );
MP4_StopDecoder( p_input, p_demux_track );
MP4_StartDecoder( p_input, p_demux_track );
}
}
return( 1 );
}
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