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/*
* 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 org.mozilla.thirdparty.com.google.android.exoplayer2.source.chunk;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.DefaultExtractorInput;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.ExtractorInput;
import org.mozilla.thirdparty.com.google.android.exoplayer2.extractor.TrackOutput;
import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSource;
import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSpec;
import org.mozilla.thirdparty.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 long nextLoadPosition;
private 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, or {@link C#INDEX_UNSET} if it is not known.
* @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,
/* clippedStartTimeUs= */ C.TIME_UNSET,
/* clippedEndTimeUs= */ C.TIME_UNSET,
chunkIndex);
this.trackType = trackType;
this.sampleFormat = sampleFormat;
}
@Override
public boolean isLoadCompleted() {
return loadCompleted;
}
// Loadable implementation.
@Override
public void cancelLoad() {
// Do nothing.
}
@SuppressWarnings("NonAtomicVolatileUpdate")
@Override
public void load() throws IOException, InterruptedException {
BaseMediaChunkOutput output = getOutput();
output.setSampleOffsetUs(0);
TrackOutput trackOutput = output.track(0, trackType);
trackOutput.format(sampleFormat);
try {
// Create and open the input.
DataSpec loadDataSpec = dataSpec.subrange(nextLoadPosition);
long length = dataSource.open(loadDataSpec);
if (length != C.LENGTH_UNSET) {
length += nextLoadPosition;
}
ExtractorInput extractorInput =
new DefaultExtractorInput(dataSource, nextLoadPosition, length);
// Load the sample data.
int result = 0;
while (result != C.RESULT_END_OF_INPUT) {
nextLoadPosition += result;
result = trackOutput.sampleData(extractorInput, Integer.MAX_VALUE, true);
}
int sampleSize = (int) nextLoadPosition;
trackOutput.sampleMetadata(startTimeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
} finally {
Util.closeQuietly(dataSource);
}
loadCompleted = true;
}
}
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