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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 org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.FormatHolder;
import org.mozilla.thirdparty.com.google.android.exoplayer2.decoder.DecoderInputBuffer;
import org.mozilla.thirdparty.com.google.android.exoplayer2.source.SampleStream;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
import java.io.IOException;
/**
* {@link SampleStream} for a particular sample queue in HLS.
*/
/* package */ final class HlsSampleStream implements SampleStream {
private final int trackGroupIndex;
private final HlsSampleStreamWrapper sampleStreamWrapper;
private int sampleQueueIndex;
public HlsSampleStream(HlsSampleStreamWrapper sampleStreamWrapper, int trackGroupIndex) {
this.sampleStreamWrapper = sampleStreamWrapper;
this.trackGroupIndex = trackGroupIndex;
sampleQueueIndex = HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING;
}
public void bindSampleQueue() {
Assertions.checkArgument(sampleQueueIndex == HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING);
sampleQueueIndex = sampleStreamWrapper.bindSampleQueueToSampleStream(trackGroupIndex);
}
public void unbindSampleQueue() {
if (sampleQueueIndex != HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING) {
sampleStreamWrapper.unbindSampleQueue(trackGroupIndex);
sampleQueueIndex = HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING;
}
}
// SampleStream implementation.
@Override
public boolean isReady() {
return sampleQueueIndex == HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_NON_FATAL
|| (hasValidSampleQueueIndex() && sampleStreamWrapper.isReady(sampleQueueIndex));
}
@Override
public void maybeThrowError() throws IOException {
if (sampleQueueIndex == HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_FATAL) {
throw new SampleQueueMappingException(
sampleStreamWrapper.getTrackGroups().get(trackGroupIndex).getFormat(0).sampleMimeType);
} else if (sampleQueueIndex == HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING) {
sampleStreamWrapper.maybeThrowError();
} else if (sampleQueueIndex != HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_NON_FATAL) {
sampleStreamWrapper.maybeThrowError(sampleQueueIndex);
}
}
@Override
public int readData(FormatHolder formatHolder, DecoderInputBuffer buffer, boolean requireFormat) {
if (sampleQueueIndex == HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_NON_FATAL) {
buffer.addFlag(C.BUFFER_FLAG_END_OF_STREAM);
return C.RESULT_BUFFER_READ;
}
return hasValidSampleQueueIndex()
? sampleStreamWrapper.readData(sampleQueueIndex, formatHolder, buffer, requireFormat)
: C.RESULT_NOTHING_READ;
}
@Override
public int skipData(long positionUs) {
return hasValidSampleQueueIndex()
? sampleStreamWrapper.skipData(sampleQueueIndex, positionUs)
: 0;
}
// Internal methods.
private boolean hasValidSampleQueueIndex() {
return sampleQueueIndex != HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_PENDING
&& sampleQueueIndex != HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_NON_FATAL
&& sampleQueueIndex != HlsSampleStreamWrapper.SAMPLE_QUEUE_INDEX_NO_MAPPING_FATAL;
}
}
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