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/*
* Copyright 2008 CoreMedia AG, 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.coremedia.iso.boxes;
import com.googlecode.mp4parser.AbstractContainerBox;
/**
* Tracks are used for two purposes: (a) to contain media data (media tracks) and (b) to contain packetization
* information for streaming protocols (hint tracks). <br>
* There shall be at least one media track within an ISO file, and all the media tracks that contributed to the hint
* tracks shall remain in the file, even if the media data within them is not referenced by the hint tracks; after
* deleting all hint tracks, the entire un-hinted presentation shall remain.
*/
public class TrackBox extends AbstractContainerBox {
public static final String TYPE = "trak";
public TrackBox() {
super(TYPE);
}
public TrackHeaderBox getTrackHeaderBox() {
for (Box box : boxes) {
if (box instanceof TrackHeaderBox) {
return (TrackHeaderBox) box;
}
}
return null;
}
/**
* Gets the SampleTableBox at mdia/minf/stbl if existing.
*
* @return the SampleTableBox or <code>null</code>
*/
public SampleTableBox getSampleTableBox() {
MediaBox mdia = getMediaBox();
if (mdia != null) {
MediaInformationBox minf = mdia.getMediaInformationBox();
if (minf != null) {
return minf.getSampleTableBox();
}
}
return null;
}
public MediaBox getMediaBox() {
for (Box box : boxes) {
if (box instanceof MediaBox) {
return (MediaBox) box;
}
}
return null;
}
}
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