/*
* Copyright 2012 Sebastian Annies, Hamburg
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.mp4parser.muxer.tracks;
import org.mp4parser.boxes.iso14496.part12.CompositionTimeToSample;
import org.mp4parser.boxes.iso14496.part12.SampleDependencyTypeBox;
import org.mp4parser.boxes.iso14496.part12.SampleDescriptionBox;
import org.mp4parser.boxes.iso14496.part12.SubSampleInformationBox;
import org.mp4parser.boxes.samplegrouping.GroupEntry;
import org.mp4parser.muxer.Edit;
import org.mp4parser.muxer.Sample;
import org.mp4parser.muxer.Track;
import org.mp4parser.muxer.TrackMetaData;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* Changes the timescale of a track by wrapping the track.
*/
public class MultiplyTimeScaleTrack implements Track {
Track source;
private int timeScaleFactor;
public MultiplyTimeScaleTrack(Track source, int timeScaleFactor) {
this.source = source;
this.timeScaleFactor = timeScaleFactor;
}
static List<CompositionTimeToSample.Entry> adjustCtts(List<CompositionTimeToSample.Entry> source, int timeScaleFactor) {
if (source != null) {
List<CompositionTimeToSample.Entry> entries2 = new ArrayList<CompositionTimeToSample.Entry>(source.size());
for (CompositionTimeToSample.Entry entry : source) {
entries2.add(new CompositionTimeToSample.Entry(entry.getCount(), timeScaleFactor * entry.getOffset()));
}
return entries2;
} else {
return null;
}
}
public void close() throws IOException {
source.close();
}
public SampleDescriptionBox getSampleDescriptionBox() {
return source.getSampleDescriptionBox();
}
public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() {
return adjustCtts(source.getCompositionTimeEntries(), timeScaleFactor);
}
public long[] getSyncSamples() {
return source.getSyncSamples();
}
public List<SampleDependencyTypeBox.Entry> getSampleDependencies() {
return source.getSampleDependencies();
}
public TrackMetaData getTrackMetaData() {
TrackMetaData trackMetaData = (TrackMetaData) source.getTrackMetaData().clone();
trackMetaData.setTimescale(source.getTrackMetaData().getTimescale() * this.timeScaleFactor);
return trackMetaData;
}
public String getHandler() {
return source.getHandler();
}
public List<Sample> getSamples() {
return source.getSamples();
}
public long[] getSampleDurations() {
long[] scaled = new long[source.getSampleDurations().length];
for (int i = 0; i < source.getSampleDurations().length; i++) {
scaled[i] = source.getSampleDurations()[i] * timeScaleFactor;
}
return scaled;
}
public SubSampleInformationBox getSubsampleInformationBox() {
return source.getSubsampleInformationBox();
}
public long getDuration() {
return source.getDuration() * timeScaleFactor;
}
@Override
public String toString() {
return "MultiplyTimeScaleTrack{" +
"source=" + source +
'}';
}
public String getName() {
return "timscale(" + source.getName() + ")";
}
public List<Edit> getEdits() {
return source.getEdits();
}
public Map<GroupEntry, long[]> getSampleGroups() {
return source.getSampleGroups();
}
}