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/*
* 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 com.googlecode.mp4parser.authoring.tracks;
import com.coremedia.iso.boxes.*;
import com.googlecode.mp4parser.authoring.Track;
import com.googlecode.mp4parser.authoring.TrackMetaData;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
/**
* Changes the timescale of a track by wrapping the track.
*/
public class DivideTimeScaleTrack implements Track {
Track source;
private int timeScaleDivisor;
public DivideTimeScaleTrack(Track source, int timeScaleDivisor) {
this.source = source;
this.timeScaleDivisor = timeScaleDivisor;
}
public SampleDescriptionBox getSampleDescriptionBox() {
return source.getSampleDescriptionBox();
}
public List<TimeToSampleBox.Entry> getDecodingTimeEntries() {
return adjustTts();
}
public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() {
return adjustCtts();
}
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.timeScaleDivisor);
return trackMetaData;
}
public String getHandler() {
return source.getHandler();
}
public boolean isEnabled() {
return source.isEnabled();
}
public boolean isInMovie() {
return source.isInMovie();
}
public boolean isInPreview() {
return source.isInPreview();
}
public boolean isInPoster() {
return source.isInPoster();
}
public List<ByteBuffer> getSamples() {
return source.getSamples();
}
List<CompositionTimeToSample.Entry> adjustCtts() {
List<CompositionTimeToSample.Entry> origCtts = this.source.getCompositionTimeEntries();
if (origCtts != null) {
List<CompositionTimeToSample.Entry> entries2 = new ArrayList<CompositionTimeToSample.Entry>(origCtts.size());
for (CompositionTimeToSample.Entry entry : origCtts) {
entries2.add(new CompositionTimeToSample.Entry(entry.getCount(), entry.getOffset() / timeScaleDivisor));
}
return entries2;
} else {
return null;
}
}
List<TimeToSampleBox.Entry> adjustTts() {
List<TimeToSampleBox.Entry> origTts = source.getDecodingTimeEntries();
LinkedList<TimeToSampleBox.Entry> entries2 = new LinkedList<TimeToSampleBox.Entry>();
for (TimeToSampleBox.Entry e : origTts) {
entries2.add(new TimeToSampleBox.Entry(e.getCount(), e.getDelta() / timeScaleDivisor));
}
return entries2;
}
public Box getMediaHeaderBox() {
return source.getMediaHeaderBox();
}
public SubSampleInformationBox getSubsampleInformationBox() {
return source.getSubsampleInformationBox();
}
@Override
public String toString() {
return "MultiplyTimeScaleTrack{" +
"source=" + source +
'}';
}
}
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