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.source.chunk;
  
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.extractor.DefaultExtractorInput;
  import com.google.android.exoplayer2.extractor.ExtractorInput;
  import com.google.android.exoplayer2.extractor.TrackOutput;
  import com.google.android.exoplayer2.upstream.DataSource;
  import com.google.android.exoplayer2.upstream.DataSpec;
  import com.google.android.exoplayer2.util.Util;
  import java.io.IOException;
  
  /**
   * A {@link BaseMediaChunk} for chunks consisting of a single raw sample.
   */
  public final class SingleSampleMediaChunk extends BaseMediaChunk {
  
    private final int trackType;
    private final Format sampleFormat;
  
    private volatile int bytesLoaded;
    private volatile boolean loadCanceled;
    private volatile boolean loadCompleted;
  
    /**
     * @param dataSource The source from which the data should be loaded.
     * @param dataSpec Defines the data to be loaded.
     * @param trackFormat See {@link #trackFormat}.
     * @param trackSelectionReason See {@link #trackSelectionReason}.
     * @param trackSelectionData See {@link #trackSelectionData}.
     * @param startTimeUs The start time of the media contained by the chunk, in microseconds.
     * @param endTimeUs The end time of the media contained by the chunk, in microseconds.
     * @param chunkIndex The index of the chunk.
     * @param trackType The type of the chunk. Typically one of the {@link C} {@code TRACK_TYPE_*}
     *     constants.
     * @param sampleFormat The {@link Format} of the sample in the chunk.
     */
    public SingleSampleMediaChunk(
        DataSource dataSource,
        DataSpec dataSpec,
        Format trackFormat,
        int trackSelectionReason,
        Object trackSelectionData,
        long startTimeUs,
        long endTimeUs,
        long chunkIndex,
        int trackType,
        Format sampleFormat) {
      super(dataSource, dataSpec, trackFormat, trackSelectionReason, trackSelectionData, startTimeUs,
          endTimeUs, chunkIndex);
      this.trackType = trackType;
      this.sampleFormat = sampleFormat;
    }
  
  
    @Override
    public boolean isLoadCompleted() {
      return loadCompleted;
    }
  
    @Override
    public long bytesLoaded() {
      return bytesLoaded;
    }
  
    // Loadable implementation.
  
    @Override
    public void cancelLoad() {
      loadCanceled = true;
    }
  
    @Override
    public boolean isLoadCanceled() {
      return loadCanceled;
    }
  
    @SuppressWarnings("NonAtomicVolatileUpdate")
    @Override
    public void load() throws IOException, InterruptedException {
      DataSpec loadDataSpec = dataSpec.subrange(bytesLoaded);
      try {
        // Create and open the input.
        long length = dataSource.open(loadDataSpec);
        if (length != C.LENGTH_UNSET) {
          length += bytesLoaded;
        }
        ExtractorInput extractorInput = new DefaultExtractorInput(dataSource, bytesLoaded, length);
        BaseMediaChunkOutput output = getOutput();
        output.setSampleOffsetUs(0);
        TrackOutput trackOutput = output.track(0, trackType);
        trackOutput.format(sampleFormat);
        // Load the sample data.
        int result = 0;
        while (result != C.RESULT_END_OF_INPUT) {
          bytesLoaded += result;
          result = trackOutput.sampleData(extractorInput, Integer.MAX_VALUE, true);
        }
        int sampleSize = bytesLoaded;
        trackOutput.sampleMetadata(startTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
      } finally {
        Util.closeQuietly(dataSource);
      }
      loadCompleted = true;
    }
  
  }
  