private MovieBox createMovieBox(Movie movie) {
MovieBox movieBox = new MovieBox();
MovieHeaderBox mvhd = new MovieHeaderBox();
mvhd.setVersion(1);
mvhd.setCreationTime(DateHelper.convert(new Date()));
mvhd.setModificationTime(DateHelper.convert(new Date()));
long movieTimeScale = getTimescale(movie);
long duration = 0;
for (Track track : movie.getTracks()) {
long tracksDuration =
getDuration(track) * movieTimeScale / track.getTrackMetaData().getTimescale();
if (tracksDuration > duration) {
duration = tracksDuration;
}
}
mvhd.setDuration(duration);
mvhd.setTimescale(movieTimeScale);
// find the next available trackId
long nextTrackId = 0;
for (Track track : movie.getTracks()) {
nextTrackId =
nextTrackId < track.getTrackMetaData().getTrackId()
? track.getTrackMetaData().getTrackId()
: nextTrackId;
}
mvhd.setNextTrackId(++nextTrackId);
movieBox.addBox(mvhd);
for (Track track : movie.getTracks()) {
movieBox.addBox(createTrackBox(track, movie));
}
// metadata here
Box udta = createUdta(movie);
if (udta != null) {
movieBox.addBox(udta);
}
return movieBox;
}
private TrackBox createTrackBox(Track track, Movie movie) {
LOG.info("Creating Mp4TrackImpl " + track);
TrackBox trackBox = new TrackBox();
TrackHeaderBox tkhd = new TrackHeaderBox();
tkhd.setVersion(1);
int flags = 0;
if (track.isEnabled()) {
flags += 1;
}
if (track.isInMovie()) {
flags += 2;
}
if (track.isInPreview()) {
flags += 4;
}
if (track.isInPoster()) {
flags += 8;
}
tkhd.setFlags(flags);
tkhd.setAlternateGroup(track.getTrackMetaData().getGroup());
tkhd.setCreationTime(DateHelper.convert(track.getTrackMetaData().getCreationTime()));
// We need to take edit list box into account in trackheader duration
// but as long as I don't support edit list boxes it is sufficient to
// just translate media duration to movie timescale
tkhd.setDuration(
getDuration(track) * getTimescale(movie) / track.getTrackMetaData().getTimescale());
tkhd.setHeight(track.getTrackMetaData().getHeight());
tkhd.setWidth(track.getTrackMetaData().getWidth());
tkhd.setLayer(track.getTrackMetaData().getLayer());
tkhd.setModificationTime(DateHelper.convert(new Date()));
tkhd.setTrackId(track.getTrackMetaData().getTrackId());
tkhd.setVolume(track.getTrackMetaData().getVolume());
trackBox.addBox(tkhd);
/*
EditBox edit = new EditBox();
EditListBox editListBox = new EditListBox();
editListBox.setEntries(Collections.singletonList(
new EditListBox.Entry(editListBox, (long) (track.getTrackMetaData().getStartTime() * getTimescale(movie)), -1, 1)));
edit.addBox(editListBox);
trackBox.addBox(edit);
*/
MediaBox mdia = new MediaBox();
trackBox.addBox(mdia);
MediaHeaderBox mdhd = new MediaHeaderBox();
mdhd.setCreationTime(DateHelper.convert(track.getTrackMetaData().getCreationTime()));
mdhd.setDuration(getDuration(track));
mdhd.setTimescale(track.getTrackMetaData().getTimescale());
mdhd.setLanguage(track.getTrackMetaData().getLanguage());
mdia.addBox(mdhd);
HandlerBox hdlr = new HandlerBox();
mdia.addBox(hdlr);
hdlr.setHandlerType(track.getHandler());
MediaInformationBox minf = new MediaInformationBox();
minf.addBox(track.getMediaHeaderBox());
// dinf: all these three boxes tell us is that the actual
// data is in the current file and not somewhere external
DataInformationBox dinf = new DataInformationBox();
DataReferenceBox dref = new DataReferenceBox();
dinf.addBox(dref);
DataEntryUrlBox url = new DataEntryUrlBox();
url.setFlags(1);
dref.addBox(url);
minf.addBox(dinf);
//
SampleTableBox stbl = new SampleTableBox();
stbl.addBox(track.getSampleDescriptionBox());
List<TimeToSampleBox.Entry> decodingTimeToSampleEntries = track.getDecodingTimeEntries();
if (decodingTimeToSampleEntries != null && !track.getDecodingTimeEntries().isEmpty()) {
TimeToSampleBox stts = new TimeToSampleBox();
stts.setEntries(track.getDecodingTimeEntries());
stbl.addBox(stts);
}
List<CompositionTimeToSample.Entry> compositionTimeToSampleEntries =
track.getCompositionTimeEntries();
if (compositionTimeToSampleEntries != null && !compositionTimeToSampleEntries.isEmpty()) {
CompositionTimeToSample ctts = new CompositionTimeToSample();
ctts.setEntries(compositionTimeToSampleEntries);
stbl.addBox(ctts);
}
long[] syncSamples = track.getSyncSamples();
if (syncSamples != null && syncSamples.length > 0) {
SyncSampleBox stss = new SyncSampleBox();
stss.setSampleNumber(syncSamples);
stbl.addBox(stss);
}
if (track.getSampleDependencies() != null && !track.getSampleDependencies().isEmpty()) {
SampleDependencyTypeBox sdtp = new SampleDependencyTypeBox();
sdtp.setEntries(track.getSampleDependencies());
stbl.addBox(sdtp);
}
HashMap<Track, int[]> track2ChunkSizes = new HashMap<Track, int[]>();
for (Track current : movie.getTracks()) {
track2ChunkSizes.put(current, getChunkSizes(current, movie));
}
int[] tracksChunkSizes = track2ChunkSizes.get(track);
SampleToChunkBox stsc = new SampleToChunkBox();
stsc.setEntries(new LinkedList<SampleToChunkBox.Entry>());
long lastChunkSize = Integer.MIN_VALUE; // to be sure the first chunks hasn't got the same size
for (int i = 0; i < tracksChunkSizes.length; i++) {
// The sample description index references the sample description box
// that describes the samples of this chunk. My Tracks cannot have more
// than one sample description box. Therefore 1 is always right
// the first chunk has the number '1'
if (lastChunkSize != tracksChunkSizes[i]) {
stsc.getEntries().add(new SampleToChunkBox.Entry(i + 1, tracksChunkSizes[i], 1));
lastChunkSize = tracksChunkSizes[i];
}
}
stbl.addBox(stsc);
SampleSizeBox stsz = new SampleSizeBox();
stsz.setSampleSizes(track2SampleSizes.get(track));
stbl.addBox(stsz);
// The ChunkOffsetBox we create here is just a stub
// since we haven't created the whole structure we can't tell where the
// first chunk starts (mdat box). So I just let the chunk offset
// start at zero and I will add the mdat offset later.
StaticChunkOffsetBox stco = new StaticChunkOffsetBox();
this.chunkOffsetBoxes.add(stco);
long offset = 0;
long[] chunkOffset = new long[tracksChunkSizes.length];
// all tracks have the same number of chunks
if (LOG.isLoggable(Level.FINE)) {
LOG.fine("Calculating chunk offsets for track_" + track.getTrackMetaData().getTrackId());
}
for (int i = 0; i < tracksChunkSizes.length; i++) {
// The filelayout will be:
// chunk_1_track_1,... ,chunk_1_track_n, chunk_2_track_1,... ,chunk_2_track_n, ... ,
// chunk_m_track_1,... ,chunk_m_track_n
// calculating the offsets
if (LOG.isLoggable(Level.FINER)) {
LOG.finer(
"Calculating chunk offsets for track_"
+ track.getTrackMetaData().getTrackId()
+ " chunk "
+ i);
}
for (Track current : movie.getTracks()) {
if (LOG.isLoggable(Level.FINEST)) {
LOG.finest("Adding offsets of track_" + current.getTrackMetaData().getTrackId());
}
int[] chunkSizes = track2ChunkSizes.get(current);
long firstSampleOfChunk = 0;
for (int j = 0; j < i; j++) {
firstSampleOfChunk += chunkSizes[j];
}
if (current == track) {
chunkOffset[i] = offset;
}
for (int j = l2i(firstSampleOfChunk); j < firstSampleOfChunk + chunkSizes[i]; j++) {
offset += track2SampleSizes.get(current)[j];
}
}
}
stco.setChunkOffsets(chunkOffset);
stbl.addBox(stco);
minf.addBox(stbl);
mdia.addBox(minf);
return trackBox;
}
