content: /*
   * Copyright (C) 2016 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;
  
  import androidx.annotation.Nullable;
  import java.nio.ByteBuffer;
  
  /** Decodes metadata from binary data. */
  public interface MetadataDecoder {
  
    /**
     * Decodes a {@link Metadata} element from the provided input buffer.
     *
     * <p>Respects {@link ByteBuffer#limit()} of {@code inputBuffer.data}, but assumes {@link
     * ByteBuffer#position()} and {@link ByteBuffer#arrayOffset()} are both zero and {@link
     * ByteBuffer#hasArray()} is true.
     *
     * @param inputBuffer The input buffer to decode.
     * @return The decoded metadata object, or {@code null} if the metadata could not be decoded or if
     *     {@link MetadataInputBuffer#isDecodeOnly()} was set on the input buffer.
     */
    @Nullable
    Metadata decode(MetadataInputBuffer inputBuffer);
  }
  