private static long[] getTimes(Movie m, Track track) {
long[] syncSamples = track.getSyncSamples();
long[] syncSampleTimes = new long[syncSamples.length];
Queue<TimeToSampleBox.Entry> timeQueue =
new LinkedList<TimeToSampleBox.Entry>(track.getDecodingTimeEntries());
int currentSample = 1; // first syncsample is 1
long currentDuration = 0;
long currentDelta = 0;
int currentSyncSampleIndex = 0;
long left = 0;
long timeScale = 1;
for (Track track1 : m.getTracks()) {
if (track1.getHandler().equals(track.getHandler())) {
if (track1.getTrackMetaData().getTimescale() != track.getTrackMetaData().getTimescale()) {
timeScale = lcm(timeScale, track1.getTrackMetaData().getTimescale());
}
}
}
while (currentSample <= syncSamples[syncSamples.length - 1]) {
if (currentSample++ == syncSamples[currentSyncSampleIndex]) {
syncSampleTimes[currentSyncSampleIndex++] = currentDuration * timeScale;
}
if (left-- == 0) {
TimeToSampleBox.Entry entry = timeQueue.poll();
left = entry.getCount() - 1;
currentDelta = entry.getDelta();
}
currentDuration += currentDelta;
}
return syncSampleTimes;
}
/**
* Calculates the timestamp of all tracks' sync samples.
*
* @param movie
* @param track
* @return
*/
public static List<long[]> getSyncSamplesTimestamps(Movie movie, Track track) {
List<long[]> times = new LinkedList<long[]>();
for (Track currentTrack : movie.getTracks()) {
if (currentTrack.getHandler().equals(track.getHandler())) {
long[] currentTrackSyncSamples = currentTrack.getSyncSamples();
if (currentTrackSyncSamples != null && currentTrackSyncSamples.length > 0) {
final long[] currentTrackTimes = getTimes(movie, currentTrack);
times.add(currentTrackTimes);
}
}
}
return times;
}
public String getHandler() {
return source.getHandler();
}
protected TrackBox createTrackBox(Track track, Movie movie, Map<Track, int[]> chunks) {
TrackBox trackBox = new TrackBox();
TrackHeaderBox tkhd = new TrackHeaderBox();
tkhd.setEnabled(true);
tkhd.setInMovie(true);
tkhd.setInPreview(true);
tkhd.setInPoster(true);
tkhd.setMatrix(track.getTrackMetaData().getMatrix());
tkhd.setAlternateGroup(track.getTrackMetaData().getGroup());
tkhd.setCreationTime(track.getTrackMetaData().getCreationTime());
if (track.getEdits() == null || track.getEdits().isEmpty()) {
tkhd.setDuration(
track.getDuration() * getTimescale(movie) / track.getTrackMetaData().getTimescale());
} else {
long d = 0;
for (Edit edit : track.getEdits()) {
d += (long) edit.getSegmentDuration();
}
tkhd.setDuration(d * track.getTrackMetaData().getTimescale());
}
tkhd.setHeight(track.getTrackMetaData().getHeight());
tkhd.setWidth(track.getTrackMetaData().getWidth());
tkhd.setLayer(track.getTrackMetaData().getLayer());
tkhd.setModificationTime(new Date());
tkhd.setTrackId(track.getTrackMetaData().getTrackId());
tkhd.setVolume(track.getTrackMetaData().getVolume());
trackBox.addBox(tkhd);
trackBox.addBox(createEdts(track, movie));
MediaBox mdia = new MediaBox();
trackBox.addBox(mdia);
MediaHeaderBox mdhd = new MediaHeaderBox();
mdhd.setCreationTime(track.getTrackMetaData().getCreationTime());
mdhd.setDuration(track.getDuration());
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();
if (track.getHandler().equals("vide")) {
minf.addBox(new VideoMediaHeaderBox());
} else if (track.getHandler().equals("soun")) {
minf.addBox(new SoundMediaHeaderBox());
} else if (track.getHandler().equals("text")) {
minf.addBox(new NullMediaHeaderBox());
} else if (track.getHandler().equals("subt")) {
minf.addBox(new SubtitleMediaHeaderBox());
} else if (track.getHandler().equals("hint")) {
minf.addBox(new HintMediaHeaderBox());
} else if (track.getHandler().equals("sbtl")) {
minf.addBox(new NullMediaHeaderBox());
}
// 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);
//
Box stbl = createStbl(track, movie, chunks);
minf.addBox(stbl);
mdia.addBox(minf);
return trackBox;
}
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;
}
/**
* 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!");
}
}
@Override
protected List<Box> createMoofMdat(Movie movie) {
List<Box> moofsMdats = new LinkedList<Box>();
HashMap<Track, long[]> intersectionMap = new HashMap<Track, long[]>();
int maxNumberOfFragments = 0;
for (Track track : movie.getTracks()) {
long[] intersects = intersectionFinder.sampleNumbers(track);
intersectionMap.put(track, intersects);
maxNumberOfFragments = Math.max(maxNumberOfFragments, intersects.length);
}
int sequence = 1;
// this loop has two indices:
for (int cycle = 0; cycle < maxNumberOfFragments; cycle++) {
final List<Track> sortedTracks =
sortTracksInSequence(movie.getTracks(), cycle, intersectionMap);
for (Track track : sortedTracks) {
if (getAllowedHandlers().isEmpty() || getAllowedHandlers().contains(track.getHandler())) {
long[] startSamples = intersectionMap.get(track);
sequence = createFragment(moofsMdats, track, startSamples, cycle, sequence);
}
}
}
List<SegmentIndexBox> sidx_boxes = new LinkedList<SegmentIndexBox>();
int inserter = 0;
List<Box> newboxes = new ArrayList<Box>();
int counter = 0;
SegmentIndexBox sidx = new SegmentIndexBox();
for (int i = 0; i < moofsMdats.size(); i++) {
if (moofsMdats.get(i).getType().equals("sidx")) {
sidx_boxes.add((SegmentIndexBox) moofsMdats.get(i));
counter++;
if (counter == 1) {
inserter = i;
}
} else {
newboxes.add(moofsMdats.get(i));
}
}
long earliestPresentationTime = sidx_boxes.get(0).getEarliestPresentationTime();
if (earliestPresentationTime < 0) {
System.err.println(
"negative earlist_presentation_time in sidx. Setting to 0. May cause sync issues");
earliestPresentationTime = 0;
}
sidx.setEarliestPresentationTime(earliestPresentationTime);
sidx.setFirstOffset(sidx_boxes.get(0).getFirstOffset());
sidx.setReferenceId(sidx_boxes.get(0).getReferenceId());
sidx.setTimeScale(sidx_boxes.get(0).getTimeScale());
sidx.setFlags(sidx_boxes.get(0).getFlags());
List<SegmentIndexBox.Entry> sidxbox_entries = new ArrayList<SegmentIndexBox.Entry>();
for (SegmentIndexBox sidxbox : sidx_boxes) {
List<SegmentIndexBox.Entry> entryfrag = sidxbox.getEntries();
for (SegmentIndexBox.Entry entry : entryfrag) {
sidxbox_entries.add(entry);
}
}
sidx.setEntries(sidxbox_entries);
newboxes.add(inserter, sidx);
return newboxes;
}
