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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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.mozilla.thirdparty.com.google.android.exoplayer2.text.cea;
import java.util.Collections;
import java.util.List;
/** Initialization data for CEA-708 decoders. */
public final class Cea708InitializationData {
/**
* Whether the closed caption service is formatted for displays with 16:9 aspect ratio. If false,
* the closed caption service is formatted for 4:3 displays.
*/
public final boolean isWideAspectRatio;
private Cea708InitializationData(List<byte[]> initializationData) {
isWideAspectRatio = initializationData.get(0)[0] != 0;
}
/**
* Returns an object representation of CEA-708 initialization data
*
* @param initializationData Binary CEA-708 initialization data.
* @return The object representation.
*/
public static Cea708InitializationData fromData(List<byte[]> initializationData) {
return new Cea708InitializationData(initializationData);
}
/**
* Builds binary CEA-708 initialization data.
*
* @param isWideAspectRatio Whether the closed caption service is formatted for displays with 16:9
* aspect ratio.
* @return Binary CEA-708 initializaton data.
*/
public static List<byte[]> buildData(boolean isWideAspectRatio) {
return Collections.singletonList(new byte[] {(byte) (isWideAspectRatio ? 1 : 0)});
}
}
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