1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.exoplayer2.metadata; 17 18 import androidx.annotation.Nullable; 19 import java.nio.ByteBuffer; 20 21 /** 22 * Decodes metadata from binary data. 23 */ 24 public interface MetadataDecoder { 25 26 /** 27 * Decodes a {@link Metadata} element from the provided input buffer. 28 * 29 * <p>Respects {@link ByteBuffer#limit()} of {@code inputBuffer.data}, but assumes {@link 30 * ByteBuffer#position()} and {@link ByteBuffer#arrayOffset()} are both zero and {@link 31 * ByteBuffer#hasArray()} is true. 32 * 33 * @param inputBuffer The input buffer to decode. 34 * @return The decoded metadata object, or null if the metadata could not be decoded. 35 */ 36 @Nullable decode(MetadataInputBuffer inputBuffer)37 Metadata decode(MetadataInputBuffer inputBuffer); 38 } 39