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.extractor.flv;
  
  import com.google.android.exoplayer2.ParserException;
  import com.google.android.exoplayer2.extractor.TrackOutput;
  import com.google.android.exoplayer2.util.ParsableByteArray;
  
  /**
   * Extracts individual samples from FLV tags, preserving original order.
   */
  /* package */ abstract class TagPayloadReader {
  
    /**
     * Thrown when the format is not supported.
     */
    public static final class UnsupportedFormatException extends ParserException {
  
      public UnsupportedFormatException(String msg) {
        super(msg);
      }
  
    }
  
    protected final TrackOutput output;
  
    /**
     * @param output A {@link TrackOutput} to which samples should be written.
     */
    protected TagPayloadReader(TrackOutput output) {
      this.output = output;
    }
  
    /**
     * Notifies the reader that a seek has occurred.
     * <p>
     * Following a call to this method, the data passed to the next invocation of
     * {@link #consume(ParsableByteArray, long)} will not be a continuation of the data that
     * was previously passed. Hence the reader should reset any internal state.
     */
    public abstract void seek();
  
    /**
     * Consumes payload data.
     *
     * @param data The payload data to consume.
     * @param timeUs The timestamp associated with the payload.
     * @throws ParserException If an error occurs parsing the data.
     */
    public final void consume(ParsableByteArray data, long timeUs) throws ParserException {
      if (parseHeader(data)) {
        parsePayload(data, timeUs);
      }
    }
  
    /**
     * Parses tag header.
     *
     * @param data Buffer where the tag header is stored.
     * @return Whether the header was parsed successfully.
     * @throws ParserException If an error occurs parsing the header.
     */
    protected abstract boolean parseHeader(ParsableByteArray data) throws ParserException;
  
    /**
     * Parses tag payload.
     *
     * @param data Buffer where tag payload is stored
     * @param timeUs Time position of the frame
     * @throws ParserException If an error occurs parsing the payload.
     */
    protected abstract void parsePayload(ParsableByteArray data, long timeUs) throws ParserException;
  
  }
  