protected Box createStbl(Track track, Movie movie, Map<Track, int[]> chunks) {
SampleTableBox stbl = new SampleTableBox();
createStsd(track, stbl);
createStts(track, stbl);
createCtts(track, stbl);
createStss(track, stbl);
createSdtp(track, stbl);
createStsc(track, chunks, stbl);
createStsz(track, stbl);
createStco(track, movie, chunks, stbl);
Map<String, List<GroupEntry>> groupEntryFamilies = new HashMap<String, List<GroupEntry>>();
for (Map.Entry<GroupEntry, long[]> sg : track.getSampleGroups().entrySet()) {
String type = sg.getKey().getType();
List<GroupEntry> groupEntries = groupEntryFamilies.get(type);
if (groupEntries == null) {
groupEntries = new ArrayList<GroupEntry>();
groupEntryFamilies.put(type, groupEntries);
}
groupEntries.add(sg.getKey());
}
for (Map.Entry<String, List<GroupEntry>> sg : groupEntryFamilies.entrySet()) {
SampleGroupDescriptionBox sgdb = new SampleGroupDescriptionBox();
String type = sg.getKey();
sgdb.setGroupEntries(sg.getValue());
SampleToGroupBox sbgp = new SampleToGroupBox();
sbgp.setGroupingType(type);
SampleToGroupBox.Entry last = null;
for (int i = 0; i < track.getSamples().size(); i++) {
int index = 0;
for (int j = 0; j < sg.getValue().size(); j++) {
GroupEntry groupEntry = sg.getValue().get(j);
long[] sampleNums = track.getSampleGroups().get(groupEntry);
if (Arrays.binarySearch(sampleNums, i) >= 0) {
index = j + 1;
}
}
if (last == null || last.getGroupDescriptionIndex() != index) {
last = new SampleToGroupBox.Entry(1, index);
sbgp.getEntries().add(last);
} else {
last.setSampleCount(last.getSampleCount() + 1);
}
}
stbl.addBox(sgdb);
stbl.addBox(sbgp);
}
if (track instanceof CencEncryptedTrack) {
createCencBoxes((CencEncryptedTrack) track, stbl, chunks.get(track));
}
createSubs(track, stbl);
return stbl;
}
protected void createSdtp(Track track, SampleTableBox stbl) {
if (track.getSampleDependencies() != null && !track.getSampleDependencies().isEmpty()) {
SampleDependencyTypeBox sdtp = new SampleDependencyTypeBox();
sdtp.setEntries(track.getSampleDependencies());
stbl.addBox(sdtp);
}
}
protected void createStss(Track track, SampleTableBox stbl) {
long[] syncSamples = track.getSyncSamples();
if (syncSamples != null && syncSamples.length > 0) {
SyncSampleBox stss = new SyncSampleBox();
stss.setSampleNumber(syncSamples);
stbl.addBox(stss);
}
}
protected void createCtts(Track track, SampleTableBox stbl) {
List<CompositionTimeToSample.Entry> compositionTimeToSampleEntries =
track.getCompositionTimeEntries();
if (compositionTimeToSampleEntries != null && !compositionTimeToSampleEntries.isEmpty()) {
CompositionTimeToSample ctts = new CompositionTimeToSample();
ctts.setEntries(compositionTimeToSampleEntries);
stbl.addBox(ctts);
}
}
protected void createCencBoxes(CencEncryptedTrack track, SampleTableBox stbl, int[] chunkSizes) {
SampleAuxiliaryInformationSizesBox saiz = new SampleAuxiliaryInformationSizesBox();
saiz.setAuxInfoType("cenc");
saiz.setFlags(1);
List<CencSampleAuxiliaryDataFormat> sampleEncryptionEntries =
track.getSampleEncryptionEntries();
if (track.hasSubSampleEncryption()) {
short[] sizes = new short[sampleEncryptionEntries.size()];
for (int i = 0; i < sizes.length; i++) {
sizes[i] = (short) sampleEncryptionEntries.get(i).getSize();
}
saiz.setSampleInfoSizes(sizes);
} else {
saiz.setDefaultSampleInfoSize(8); // 8 bytes iv
saiz.setSampleCount(track.getSamples().size());
}
SampleAuxiliaryInformationOffsetsBox saio = new SampleAuxiliaryInformationOffsetsBox();
SampleEncryptionBox senc = new SampleEncryptionBox();
senc.setSubSampleEncryption(track.hasSubSampleEncryption());
senc.setEntries(sampleEncryptionEntries);
long offset = senc.getOffsetToFirstIV();
int index = 0;
long[] offsets = new long[chunkSizes.length];
for (int i = 0; i < chunkSizes.length; i++) {
offsets[i] = offset;
for (int j = 0; j < chunkSizes[i]; j++) {
offset += sampleEncryptionEntries.get(index++).getSize();
}
}
saio.setOffsets(offsets);
stbl.addBox(saiz);
stbl.addBox(saio);
stbl.addBox(senc);
sampleAuxiliaryInformationOffsetsBoxes.add(saio);
}
protected void createStts(Track track, SampleTableBox stbl) {
TimeToSampleBox.Entry lastEntry = null;
List<TimeToSampleBox.Entry> entries = new ArrayList<TimeToSampleBox.Entry>();
for (long delta : track.getSampleDurations()) {
if (lastEntry != null && lastEntry.getDelta() == delta) {
lastEntry.setCount(lastEntry.getCount() + 1);
} else {
lastEntry = new TimeToSampleBox.Entry(1, delta);
entries.add(lastEntry);
}
}
TimeToSampleBox stts = new TimeToSampleBox();
stts.setEntries(entries);
stbl.addBox(stts);
}
protected void createStsc(Track track, Map<Track, int[]> chunks, SampleTableBox stbl) {
int[] tracksChunkSizes = chunks.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);
}
protected void createStsz(Track track, SampleTableBox stbl) {
SampleSizeBox stsz = new SampleSizeBox();
stsz.setSampleSizes(track2SampleSizes.get(track));
stbl.addBox(stsz);
}
protected void createStco(
Track targetTrack, Movie movie, Map<Track, int[]> chunks, SampleTableBox stbl) {
if (chunkOffsetBoxes.get(targetTrack) == null) {
// 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.
long offset = 0;
// all tracks have the same number of chunks
if (LOG.isLoggable(Level.FINE)) {
LOG.fine(
"Calculating chunk offsets for track_" + targetTrack.getTrackMetaData().getTrackId());
}
List<Track> tracks = new ArrayList<Track>(chunks.keySet());
Collections.sort(
tracks,
new Comparator<Track>() {
public int compare(Track o1, Track o2) {
return l2i(o1.getTrackMetaData().getTrackId() - o2.getTrackMetaData().getTrackId());
}
});
Map<Track, Integer> trackToChunk = new HashMap<Track, Integer>();
Map<Track, Integer> trackToSample = new HashMap<Track, Integer>();
Map<Track, Double> trackToTime = new HashMap<Track, Double>();
for (Track track : tracks) {
trackToChunk.put(track, 0);
trackToSample.put(track, 0);
trackToTime.put(track, 0.0);
chunkOffsetBoxes.put(track, new StaticChunkOffsetBox());
}
while (true) {
Track nextChunksTrack = null;
for (Track track : tracks) {
// This always chooses the least progressed track
if ((nextChunksTrack == null || trackToTime.get(track) < trackToTime.get(nextChunksTrack))
&&
// either first OR track's next chunk's starttime is smaller than nextTrack's next
// chunks starttime
// AND their need to be chunks left!
(trackToChunk.get(track) < chunks.get(track).length)) {
nextChunksTrack = track;
}
}
if (nextChunksTrack == null) {
break; // no next
}
// found the next one
ChunkOffsetBox chunkOffsetBox = chunkOffsetBoxes.get(nextChunksTrack);
chunkOffsetBox.setChunkOffsets(
Mp4Arrays.copyOfAndAppend(chunkOffsetBox.getChunkOffsets(), offset));
int nextChunksIndex = trackToChunk.get(nextChunksTrack);
int numberOfSampleInNextChunk = chunks.get(nextChunksTrack)[nextChunksIndex];
int startSample = trackToSample.get(nextChunksTrack);
double time = trackToTime.get(nextChunksTrack);
for (int j = startSample; j < startSample + numberOfSampleInNextChunk; j++) {
offset += track2SampleSizes.get(nextChunksTrack)[j];
time +=
(double) nextChunksTrack.getSampleDurations()[j]
/ nextChunksTrack.getTrackMetaData().getTimescale();
}
trackToChunk.put(nextChunksTrack, nextChunksIndex + 1);
trackToSample.put(nextChunksTrack, startSample + numberOfSampleInNextChunk);
trackToTime.put(nextChunksTrack, time);
}
}
stbl.addBox(chunkOffsetBoxes.get(targetTrack));
}
protected void createStsd(Track track, SampleTableBox stbl) {
stbl.addBox(track.getSampleDescriptionBox());
}
protected void createSubs(Track track, SampleTableBox stbl) {
if (track.getSubsampleInformationBox() != null) {
stbl.addBox(track.getSubsampleInformationBox());
}
}