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/* $Id: muxmp4.c,v 1.24 2005/11/04 13:09:41 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
/* libmp4v2 header */
#include "mp4.h"
#include "hb.h"
struct hb_mux_object_s
{
HB_MUX_COMMON;
hb_job_t * job;
/* libmp4v2 handle */
MP4FileHandle file;
/* Cumulated durations so far, in timescale units (see MP4Mux) */
uint64_t sum_dur;
};
struct hb_mux_data_s
{
MP4TrackId track;
};
/**********************************************************************
* MP4Init
**********************************************************************
* Allocates hb_mux_data_t structures, create file and write headers
*********************************************************************/
static int MP4Init( hb_mux_object_t * m )
{
hb_job_t * job = m->job;
hb_title_t * title = job->title;
hb_audio_t * audio;
hb_mux_data_t * mux_data;
int i;
/* Create an empty mp4 file */
m->file = MP4Create( job->file, MP4_DETAILS_ERROR, 0 );
/* Video track */
mux_data = malloc( sizeof( hb_mux_data_t ) );
job->mux_data = mux_data;
/* When using the standard 90000 timescale, QuickTime tends to have
synchronization issues (audio not playing at the correct speed).
To workaround this, we use the audio samplerate as the
timescale */
MP4SetTimeScale( m->file, job->arate );
if( job->vcodec == HB_VCODEC_X264 )
{
#define c job->config.h264
/* Stolen from mp4creator */
MP4SetVideoProfileLevel( m->file, 0x7F );
mux_data->track = MP4AddH264VideoTrack( m->file, job->arate,
MP4_INVALID_DURATION, job->width, job->height,
c.sps[1], /* AVCProfileIndication */
c.sps[2], /* profile_compat */
c.sps[3], /* AVCLevelIndication */
3 ); /* 4 bytes length before each NAL unit */
MP4AddH264SequenceParameterSet( m->file, mux_data->track,
c.sps, c.sps_length );
MP4AddH264PictureParameterSet( m->file, mux_data->track,
c.pps, c.pps_length );
#undef c
}
else /* FFmpeg or XviD */
{
#define c job->config.mpeg4
MP4SetVideoProfileLevel( m->file, MPEG4_SP_L3 );
mux_data->track = MP4AddVideoTrack( m->file, job->arate,
MP4_INVALID_DURATION, job->width, job->height,
MP4_MPEG4_VIDEO_TYPE );
/* VOL from FFmpeg or XviD */
MP4SetTrackESConfiguration( m->file, mux_data->track,
c.config, c.config_length );
#undef c
}
for( i = 0; i < hb_list_count( title->list_audio ); i++ )
{
audio = hb_list_item( title->list_audio, i );
mux_data = malloc( sizeof( hb_mux_data_t ) );
audio->mux_data = mux_data;
mux_data->track = MP4AddAudioTrack( m->file,
job->arate, 1024, MP4_MPEG4_AUDIO_TYPE );
MP4SetAudioProfileLevel( m->file, 0x0F );
MP4SetTrackESConfiguration( m->file, mux_data->track,
audio->config.faac.decinfo, audio->config.faac.size );
}
return 0;
}
static int MP4Mux( hb_mux_object_t * m, hb_mux_data_t * mux_data,
hb_buffer_t * buf )
{
hb_job_t * job = m->job;
uint64_t duration;
if( mux_data == job->mux_data )
{
/* Video */
/* Because we use the audio samplerate as the timescale,
we have to use potentially variable durations so the video
doesn't go out of sync */
duration = ( buf->stop * job->arate / 90000 ) - m->sum_dur;
m->sum_dur += duration;
}
else
{
/* Audio */
duration = MP4_INVALID_DURATION;
}
MP4WriteSample( m->file, mux_data->track, buf->data, buf->size,
duration, 0, buf->key );
return 0;
}
static int MP4End( hb_mux_object_t * m )
{
hb_job_t * job = m->job;
char filename[1024]; memset( filename, 0, 1024 );
MP4Close( m->file );
#if 0
hb_log( "muxmp4: optimizing file" );
snprintf( filename, 1024, "%s.tmp", job->file );
MP4Optimize( job->file, filename, MP4_DETAILS_ERROR );
remove( job->file );
rename( filename, job->file );
#endif
return 0;
}
hb_mux_object_t * hb_mux_mp4_init( hb_job_t * job )
{
hb_mux_object_t * m = calloc( sizeof( hb_mux_object_t ), 1 );
m->init = MP4Init;
m->mux = MP4Mux;
m->end = MP4End;
m->job = job;
return m;
}
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