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/*
* Copyright 2012 castLabs, Berlin
*
* 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.boxes.mp4.samplegrouping;
import java.nio.ByteBuffer;
/**
* roll_distance is a signed integer that gives the number of samples that must be decoded in order for
* a sample to be decoded correctly. A positive value indicates the number of samples after the sample
* that is a group member that must be decoded such that at the last of these recovery is complete, i.e.
* the last sample is correct. A negative value indicates the number of samples before the sample that is
* a group member that must be decoded in order for recovery to be complete at the marked sample.
* The value zero must not be used; the sync sample table documents random access points for which
* no recovery roll is needed.
*/
public class RollRecoveryEntry extends GroupEntry {
public static final String TYPE = "roll";
private short rollDistance;
public short getRollDistance() {
return rollDistance;
}
public void setRollDistance(short rollDistance) {
this.rollDistance = rollDistance;
}
@Override
public void parse(ByteBuffer byteBuffer) {
rollDistance = byteBuffer.getShort();
}
@Override
public ByteBuffer get() {
ByteBuffer content = ByteBuffer.allocate(2);
content.putShort(rollDistance);
content.rewind();
return content;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
RollRecoveryEntry entry = (RollRecoveryEntry) o;
if (rollDistance != entry.rollDistance) {
return false;
}
return true;
}
@Override
public int hashCode() {
return (int) rollDistance;
}
}
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