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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"
void AddIPodUUID(MP4FileHandle, MP4TrackId);
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 )
{
/* Stolen from mp4creator */
MP4SetVideoProfileLevel( m->file, 0x7F );
if (job->areBframes == 1)
{
hb_log("muxmp4: Adjusting duration for B-frames");
mux_data->track = MP4AddH264VideoTrack( m->file, job->arate,
MP4_INVALID_DURATION+1, job->width, job->height,
job->config.h264.sps[1], /* AVCProfileIndication */
job->config.h264.sps[2], /* profile_compat */
job->config.h264.sps[3], /* AVCLevelIndication */
3 ); /* 4 bytes length before each NAL unit */
}
else
{
hb_log("muxmp4: Using default duration as there are no B-frames");
mux_data->track = MP4AddH264VideoTrack( m->file, job->arate,
MP4_INVALID_DURATION, job->width, job->height,
job->config.h264.sps[1], /* AVCProfileIndication */
job->config.h264.sps[2], /* profile_compat */
job->config.h264.sps[3], /* AVCLevelIndication */
3 ); /* 4 bytes length before each NAL unit */
}
MP4AddH264SequenceParameterSet( m->file, mux_data->track,
job->config.h264.sps, job->config.h264.sps_length );
MP4AddH264PictureParameterSet( m->file, mux_data->track,
job->config.h264.pps, job->config.h264.pps_length );
if( job->h264_level == 30)
{
hb_log("About to add iPod atom");
AddIPodUUID(m->file, mux_data->track);
}
}
else /* FFmpeg or XviD */
{
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,
job->config.mpeg4.bytes, job->config.mpeg4.length );
}
/* apply the anamorphic transformation matrix if needed */
if( job->pixel_ratio ) {
uint8_t* val;
uint8_t nval[38];
uint32_t *ptr32 = (uint32_t*) (nval + 2);
uint32_t size;
MP4GetBytesProperty(m->file, "moov.trak.tkhd.reserved3", &val, &size);
if (size == 38) {
memcpy(nval, val, size);
float width, height;
float widthRatio;
width = job->pixel_aspect_width;
height = job->pixel_aspect_height;
widthRatio = (width / height) * 0x10000;
uint32_t widthRatioInt;
widthRatioInt = (uint32_t)widthRatio;
#ifdef WORDS_BIGENDIAN
ptr32[0] = widthRatioInt;
#else
/* we need to switch the endianness, as the file format expects big endian */
ptr32[0] = ((widthRatioInt & 0x000000FF) << 24) + ((widthRatioInt & 0x0000FF00) << 8) + ((widthRatioInt & 0x00FF0000) >> 8) + ((widthRatioInt & 0xFF000000) >> 24);
#endif
if(!MP4SetBytesProperty(m->file, "moov.trak.tkhd.reserved3", nval, size)) {
hb_log("Problem setting transform matrix");
}
}
}
/* end of transformation matrix */
/* firstAudioTrack will be used to reference the first audio track when we add a chapter track */
MP4TrackId firstAudioTrack;
/* add the audio tracks */
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.aac.bytes, audio->config.aac.length );
/* store a reference to the first audio track,
so we can use it to feed the chapter text track's sample rate */
if (i == 0) {
firstAudioTrack = mux_data->track;
}
}
if (job->chapter_markers) {
/* add a text track for the chapters */
MP4TrackId textTrack;
textTrack = MP4AddChapterTextTrack(m->file, firstAudioTrack);
/* write the chapter markers for each selected chapter */
char markerBuf[13];
hb_chapter_t * chapter;
MP4Duration chapterDuration;
float fOrigDuration, fTimescale;
float fTSDuration;
for( i = job->chapter_start - 1; i <= job->chapter_end - 1; i++ )
{
chapter = hb_list_item( title->list_chapter, i );
fOrigDuration = chapter->duration;
fTimescale = job->arate;
fTSDuration = (fOrigDuration / 90000) * fTimescale;
chapterDuration = (MP4Duration)fTSDuration;
sprintf(markerBuf, " Chapter %03i", i + 1);
markerBuf[0] = 0;
markerBuf[1] = 11; // "Chapter xxx"
MP4WriteSample(m->file, textTrack, (u_int8_t*)markerBuf, 13, chapterDuration, 0, true);
}
}
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 )
{
#if 0
hb_job_t * job = m->job;
char filename[1024]; memset( filename, 0, 1024 );
#endif
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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