public SampleDescriptionBox getSampleDescriptionBox() {
return source.getSampleDescriptionBox();
}
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;
}
protected void createStsd(Track track, SampleTableBox stbl) {
stbl.addBox(track.getSampleDescriptionBox());
}
/**
* Gets an array of sample numbers that are meant to be the first sample of each chunk or
* fragment.
*
* @param track concerned track
* @param movie the context of the track
* @return an array containing the ordinal of each fragment's first sample
*/
public long[] sampleNumbers(Track track, Movie movie) {
if ("vide".equals(track.getHandler())) {
if (track.getSyncSamples() != null && track.getSyncSamples().length > 0) {
List<long[]> times = getSyncSamplesTimestamps(movie, track);
return getCommonIndices(
track.getSyncSamples(),
getTimes(movie, track),
times.toArray(new long[times.size()][]));
} else {
throw new RuntimeException(
"Video Tracks need sync samples. Only tracks other than video may have no sync samples.");
}
} else if ("soun".equals(track.getHandler())) {
Track referenceTrack = null;
for (Track candidate : movie.getTracks()) {
if (candidate.getSyncSamples() != null
&& "vide".equals(candidate.getHandler())
&& candidate.getSyncSamples().length > 0) {
referenceTrack = candidate;
}
}
if (referenceTrack != null) {
// Gets the reference track's fra
long[] refSyncSamples = sampleNumbers(referenceTrack, movie);
int refSampleCount = referenceTrack.getSamples().size();
long[] syncSamples = new long[refSyncSamples.length];
long minSampleRate = 192000;
for (Track testTrack : movie.getTracks()) {
if ("soun".equals(testTrack.getHandler())) {
AudioSampleEntry ase =
(AudioSampleEntry) testTrack.getSampleDescriptionBox().getSampleEntry();
if (ase.getSampleRate() < minSampleRate) {
minSampleRate = ase.getSampleRate();
long sc = testTrack.getSamples().size();
double stretch = (double) sc / refSampleCount;
for (int i = 0; i < syncSamples.length; i++) {
int start = (int) Math.ceil(stretch * (refSyncSamples[i] - 1)) + 1;
syncSamples[i] = start;
// The Stretch makes sure that there are as much audio and video chunks!
}
}
}
}
AudioSampleEntry ase = (AudioSampleEntry) track.getSampleDescriptionBox().getSampleEntry();
double factor = (double) ase.getSampleRate() / (double) minSampleRate;
if (factor != Math.rint(factor)) { // Not an integer
throw new RuntimeException(
"Sample rates must be a multiple of the lowest sample rate to create a correct file!");
}
for (int i = 1; i < syncSamples.length; i++) {
syncSamples[i] = (int) (1 + (syncSamples[i] - 1) * factor);
}
return syncSamples;
}
throw new RuntimeException(
"There was absolutely no Track with sync samples. I can't work with that!");
} else {
// Ok, my track has no sync samples - let's find one with sync samples.
for (Track candidate : movie.getTracks()) {
if (candidate.getSyncSamples() != null && candidate.getSyncSamples().length > 0) {
long[] refSyncSamples = sampleNumbers(candidate, movie);
int refSampleCount = candidate.getSamples().size();
long[] syncSamples = new long[refSyncSamples.length];
long sc = track.getSamples().size();
double stretch = (double) sc / refSampleCount;
for (int i = 0; i < syncSamples.length; i++) {
int start = (int) Math.ceil(stretch * (refSyncSamples[i] - 1)) + 1;
syncSamples[i] = start;
// The Stretch makes sure that there are as much audio and video chunks!
}
return syncSamples;
}
}
throw new RuntimeException(
"There was absolutely no Track with sync samples. I can't work with that!");
}
}
