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/*
* Copyright (C) 2017 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.metadata.emsg;
import org.mozilla.thirdparty.com.google.android.exoplayer2.metadata.Metadata;
import org.mozilla.thirdparty.com.google.android.exoplayer2.metadata.MetadataDecoder;
import org.mozilla.thirdparty.com.google.android.exoplayer2.metadata.MetadataInputBuffer;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray;
import java.nio.ByteBuffer;
import java.util.Arrays;
/** Decodes data encoded by {@link EventMessageEncoder}. */
public final class EventMessageDecoder implements MetadataDecoder {
@SuppressWarnings("ByteBufferBackingArray")
@Override
public Metadata decode(MetadataInputBuffer inputBuffer) {
ByteBuffer buffer = Assertions.checkNotNull(inputBuffer.data);
byte[] data = buffer.array();
int size = buffer.limit();
return new Metadata(decode(new ParsableByteArray(data, size)));
}
public EventMessage decode(ParsableByteArray emsgData) {
String schemeIdUri = Assertions.checkNotNull(emsgData.readNullTerminatedString());
String value = Assertions.checkNotNull(emsgData.readNullTerminatedString());
long durationMs = emsgData.readUnsignedInt();
long id = emsgData.readUnsignedInt();
byte[] messageData =
Arrays.copyOfRange(emsgData.data, emsgData.getPosition(), emsgData.limit());
return new EventMessage(schemeIdUri, value, durationMs, id, messageData);
}
}
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