/*
* Copyright 2020 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 androidx.media3.exoplayer.hls;
import androidx.annotation.VisibleForTesting;
import androidx.media3.common.Format;
import androidx.media3.common.util.Assertions;
import androidx.media3.common.util.TimestampAdjuster;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.extractor.Extractor;
import androidx.media3.extractor.ExtractorInput;
import androidx.media3.extractor.ExtractorOutput;
import androidx.media3.extractor.PositionHolder;
import androidx.media3.extractor.mp3.Mp3Extractor;
import androidx.media3.extractor.mp4.FragmentedMp4Extractor;
import androidx.media3.extractor.ts.Ac3Extractor;
import androidx.media3.extractor.ts.Ac4Extractor;
import androidx.media3.extractor.ts.AdtsExtractor;
import androidx.media3.extractor.ts.TsExtractor;
import java.io.IOException;
/**
* {@link HlsMediaChunkExtractor} implementation that uses ExoPlayer app-bundled {@link Extractor
* Extractors}.
*/
@UnstableApi
public final class BundledHlsMediaChunkExtractor implements HlsMediaChunkExtractor {
private static final PositionHolder POSITION_HOLDER = new PositionHolder();
@VisibleForTesting /* package */ final Extractor extractor;
private final Format masterPlaylistFormat;
private final TimestampAdjuster timestampAdjuster;
/**
* Creates a new instance.
*
* @param extractor The underlying {@link Extractor}.
* @param masterPlaylistFormat The {@link Format} obtained from the master playlist.
* @param timestampAdjuster A {@link TimestampAdjuster} to adjust sample timestamps.
*/
public BundledHlsMediaChunkExtractor(
Extractor extractor, Format masterPlaylistFormat, TimestampAdjuster timestampAdjuster) {
this.extractor = extractor;
this.masterPlaylistFormat = masterPlaylistFormat;
this.timestampAdjuster = timestampAdjuster;
}
@Override
public void init(ExtractorOutput extractorOutput) {
extractor.init(extractorOutput);
}
@Override
public boolean read(ExtractorInput extractorInput) throws IOException {
return extractor.read(extractorInput, POSITION_HOLDER) == Extractor.RESULT_CONTINUE;
}
@Override
public boolean isPackedAudioExtractor() {
return extractor instanceof AdtsExtractor
|| extractor instanceof Ac3Extractor
|| extractor instanceof Ac4Extractor
|| extractor instanceof Mp3Extractor;
}
@Override
public boolean isReusable() {
return extractor instanceof TsExtractor || extractor instanceof FragmentedMp4Extractor;
}
@Override
public HlsMediaChunkExtractor recreate() {
Assertions.checkState(!isReusable());
Extractor newExtractorInstance;
if (extractor instanceof WebvttExtractor) {
newExtractorInstance = new WebvttExtractor(masterPlaylistFormat.language, timestampAdjuster);
} else if (extractor instanceof AdtsExtractor) {
newExtractorInstance = new AdtsExtractor();
} else if (extractor instanceof Ac3Extractor) {
newExtractorInstance = new Ac3Extractor();
} else if (extractor instanceof Ac4Extractor) {
newExtractorInstance = new Ac4Extractor();
} else if (extractor instanceof Mp3Extractor) {
newExtractorInstance = new Mp3Extractor();
} else {
throw new IllegalStateException(
"Unexpected extractor type for recreation: " + extractor.getClass().getSimpleName());
}
return new BundledHlsMediaChunkExtractor(
newExtractorInstance, masterPlaylistFormat, timestampAdjuster);
}
@Override
public void onTruncatedSegmentParsed() {
extractor.seek(/* position= */ 0, /* timeUs= */ 0);
}
}