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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.hls;
import android.util.SparseArray;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.TimestampAdjuster;
/**
* Provides {@link TimestampAdjuster} instances for use during HLS playbacks.
*/
public final class TimestampAdjusterProvider {
// TODO: Prevent this array from growing indefinitely large by removing adjusters that are no
// longer required.
private final SparseArray<TimestampAdjuster> timestampAdjusters;
public TimestampAdjusterProvider() {
timestampAdjusters = new SparseArray<>();
}
/**
* Returns a {@link TimestampAdjuster} suitable for adjusting the pts timestamps contained in
* a chunk with a given discontinuity sequence.
*
* @param discontinuitySequence The chunk's discontinuity sequence.
* @return A {@link TimestampAdjuster}.
*/
public TimestampAdjuster getAdjuster(int discontinuitySequence) {
TimestampAdjuster adjuster = timestampAdjusters.get(discontinuitySequence);
if (adjuster == null) {
adjuster = new TimestampAdjuster(TimestampAdjuster.DO_NOT_OFFSET);
timestampAdjusters.put(discontinuitySequence, adjuster);
}
return adjuster;
}
/**
* Resets the provider.
*/
public void reset() {
timestampAdjusters.clear();
}
}
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