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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 androidx.annotation.Nullable;
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.upstream.DataSource;
import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.DataSpec;
/**
* A base implementation of {@link MediaChunk} that outputs to a {@link BaseMediaChunkOutput}.
*/
public abstract class BaseMediaChunk extends MediaChunk {
/**
* The time from which output will begin, or {@link C#TIME_UNSET} if output will begin from the
* start of the chunk.
*/
public final long clippedStartTimeUs;
/**
* The time from which output will end, or {@link C#TIME_UNSET} if output will end at the end of
* the chunk.
*/
public final long clippedEndTimeUs;
private BaseMediaChunkOutput output;
private int[] firstSampleIndices;
/**
* @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 clippedStartTimeUs The time in the chunk from which output will begin, or {@link
* C#TIME_UNSET} to output from the start of the chunk.
* @param clippedEndTimeUs The time in the chunk from which output will end, or {@link
* C#TIME_UNSET} to output to the end of the chunk.
* @param chunkIndex The index of the chunk, or {@link C#INDEX_UNSET} if it is not known.
*/
public BaseMediaChunk(
DataSource dataSource,
DataSpec dataSpec,
Format trackFormat,
int trackSelectionReason,
@Nullable Object trackSelectionData,
long startTimeUs,
long endTimeUs,
long clippedStartTimeUs,
long clippedEndTimeUs,
long chunkIndex) {
super(dataSource, dataSpec, trackFormat, trackSelectionReason, trackSelectionData, startTimeUs,
endTimeUs, chunkIndex);
this.clippedStartTimeUs = clippedStartTimeUs;
this.clippedEndTimeUs = clippedEndTimeUs;
}
/**
* Initializes the chunk for loading, setting the {@link BaseMediaChunkOutput} that will receive
* samples as they are loaded.
*
* @param output The output that will receive the loaded media samples.
*/
public void init(BaseMediaChunkOutput output) {
this.output = output;
firstSampleIndices = output.getWriteIndices();
}
/**
* Returns the index of the first sample in the specified track of the output that will originate
* from this chunk.
*/
public final int getFirstSampleIndex(int trackIndex) {
return firstSampleIndices[trackIndex];
}
/**
* Returns the output most recently passed to {@link #init(BaseMediaChunkOutput)}.
*/
protected final BaseMediaChunkOutput getOutput() {
return output;
}
}
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