| /* |
| * 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 com.google.android.exoplayer2.metadata.emsg; |
| |
| import com.google.android.exoplayer2.metadata.Metadata; |
| import com.google.android.exoplayer2.metadata.MetadataInputBuffer; |
| import com.google.android.exoplayer2.metadata.SimpleMetadataDecoder; |
| import com.google.android.exoplayer2.util.Assertions; |
| import com.google.android.exoplayer2.util.ParsableByteArray; |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| /** Decodes data encoded by {@link EventMessageEncoder}. */ |
| public final class EventMessageDecoder extends SimpleMetadataDecoder { |
| |
| @Override |
| @SuppressWarnings("ByteBufferBackingArray") // Buffer validated by SimpleMetadataDecoder.decode |
| protected Metadata decode(MetadataInputBuffer inputBuffer, ByteBuffer buffer) { |
| return new Metadata(decode(new ParsableByteArray(buffer.array(), buffer.limit()))); |
| } |
| |
| public EventMessage decode(ParsableByteArray emsgData) { |
| String schemeIdUri = Assertions.checkNotNull(emsgData.readNullTerminatedString()); |
| String value = Assertions.checkNotNull(emsgData.readNullTerminatedString()); |
| long durationMs = emsgData.readLong(); |
| long id = emsgData.readLong(); |
| byte[] messageData = |
| Arrays.copyOfRange(emsgData.getData(), emsgData.getPosition(), emsgData.limit()); |
| return new EventMessage(schemeIdUri, value, durationMs, id, messageData); |
| } |
| } |