mirror of
https://github.com/androidx/media.git
synced 2025-05-14 11:09:53 +08:00
Move SsMediaPeriod in its own file
------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=128465118
This commit is contained in:
olly
Oliver Woodman
parent
1722019e0c
commit
bf0bdd8d7c
@ -0,0 +1,245 @@
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.android.exoplayer2.source.smoothstreaming;
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import com.google.android.exoplayer2.C;
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import com.google.android.exoplayer2.extractor.mp4.TrackEncryptionBox;
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import com.google.android.exoplayer2.source.AdaptiveMediaSourceEventListener.EventDispatcher;
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import com.google.android.exoplayer2.source.CompositeSequenceableLoader;
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import com.google.android.exoplayer2.source.MediaPeriod;
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import com.google.android.exoplayer2.source.SampleStream;
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import com.google.android.exoplayer2.source.SequenceableLoader;
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import com.google.android.exoplayer2.source.TrackGroup;
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import com.google.android.exoplayer2.source.TrackGroupArray;
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import com.google.android.exoplayer2.source.chunk.ChunkSampleStream;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest.ProtectionElement;
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import com.google.android.exoplayer2.trackselection.TrackSelection;
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import com.google.android.exoplayer2.upstream.Allocator;
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import com.google.android.exoplayer2.upstream.Loader;
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import android.util.Base64;
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import java.io.IOException;
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import java.util.List;
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/**
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* A SmoothStreaming {@link MediaPeriod}.
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*/
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/* package */ final class SsMediaPeriod implements MediaPeriod,
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SequenceableLoader.Callback<ChunkSampleStream<SsChunkSource>> {
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private static final int INITIALIZATION_VECTOR_SIZE = 8;
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private final SsChunkSource.Factory chunkSourceFactory;
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private final Loader manifestLoader;
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private final int minLoadableRetryCount;
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private final EventDispatcher eventDispatcher;
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private final long durationUs;
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private final TrackGroupArray trackGroups;
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private final TrackEncryptionBox[] trackEncryptionBoxes;
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private SsManifest manifest;
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private ChunkSampleStream<SsChunkSource>[] sampleStreams;
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private CompositeSequenceableLoader sequenceableLoader;
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private Callback callback;
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private Allocator allocator;
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public SsMediaPeriod(SsManifest manifest, SsChunkSource.Factory chunkSourceFactory,
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int minLoadableRetryCount, EventDispatcher eventDispatcher, Loader manifestLoader) {
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this.manifest = manifest;
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this.chunkSourceFactory = chunkSourceFactory;
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this.manifestLoader = manifestLoader;
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this.minLoadableRetryCount = minLoadableRetryCount;
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this.eventDispatcher = eventDispatcher;
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durationUs = manifest.durationUs;
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trackGroups = buildTrackGroups(manifest);
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ProtectionElement protectionElement = manifest.protectionElement;
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if (protectionElement != null) {
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byte[] keyId = getProtectionElementKeyId(protectionElement.data);
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trackEncryptionBoxes = new TrackEncryptionBox[] {
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new TrackEncryptionBox(true, INITIALIZATION_VECTOR_SIZE, keyId)};
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} else {
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trackEncryptionBoxes = null;
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}
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}
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public void updateManifest(SsManifest manifest) {
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this.manifest = manifest;
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if (sampleStreams != null) {
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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sampleStream.getChunkSource().updateManifest(manifest);
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}
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callback.onContinueLoadingRequested(this);
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}
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}
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@Override
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public void preparePeriod(Callback callback, Allocator allocator, long positionUs) {
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this.callback = callback;
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this.allocator = allocator;
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sampleStreams = newSampleStreamArray(0);
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sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
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callback.onPeriodPrepared(this);
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}
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@Override
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public void maybeThrowPrepareError() throws IOException {
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manifestLoader.maybeThrowError();
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}
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@Override
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public long getDurationUs() {
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return durationUs;
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}
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@Override
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public TrackGroupArray getTrackGroups() {
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return trackGroups;
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}
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@Override
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public SampleStream[] selectTracks(List<SampleStream> oldStreams,
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List<TrackSelection> newSelections, long positionUs) {
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int newEnabledSourceCount = sampleStreams.length + newSelections.size() - oldStreams.size();
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ChunkSampleStream<SsChunkSource>[] newSampleStreams =
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newSampleStreamArray(newEnabledSourceCount);
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int newEnabledSourceIndex = 0;
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// Iterate over currently enabled streams, either releasing them or adding them to the new list.
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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if (oldStreams.contains(sampleStream)) {
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sampleStream.release();
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} else {
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newSampleStreams[newEnabledSourceIndex++] = sampleStream;
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}
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}
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// Instantiate and return new streams.
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SampleStream[] streamsToReturn = new SampleStream[newSelections.size()];
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for (int i = 0; i < newSelections.size(); i++) {
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newSampleStreams[newEnabledSourceIndex] = buildSampleStream(newSelections.get(i), positionUs);
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streamsToReturn[i] = newSampleStreams[newEnabledSourceIndex];
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newEnabledSourceIndex++;
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}
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sampleStreams = newSampleStreams;
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sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
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return streamsToReturn;
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}
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@Override
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public boolean continueLoading(long positionUs) {
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return sequenceableLoader.continueLoading(positionUs);
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}
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@Override
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public long getNextLoadPositionUs() {
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return sequenceableLoader.getNextLoadPositionUs();
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}
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@Override
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public long readDiscontinuity() {
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return C.UNSET_TIME_US;
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}
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@Override
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public long getBufferedPositionUs() {
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long bufferedPositionUs = Long.MAX_VALUE;
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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long rendererBufferedPositionUs = sampleStream.getBufferedPositionUs();
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if (rendererBufferedPositionUs != C.END_OF_SOURCE_US) {
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bufferedPositionUs = Math.min(bufferedPositionUs, rendererBufferedPositionUs);
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}
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}
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return bufferedPositionUs == Long.MAX_VALUE ? C.END_OF_SOURCE_US : bufferedPositionUs;
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}
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@Override
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public long seekToUs(long positionUs) {
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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sampleStream.seekToUs(positionUs);
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}
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return positionUs;
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}
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@Override
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public void releasePeriod() {
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if (sampleStreams != null) {
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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sampleStream.release();
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}
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sampleStreams = null;
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}
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sequenceableLoader = null;
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callback = null;
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allocator = null;
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}
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// SequenceableLoader.Callback implementation
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@Override
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public void onContinueLoadingRequested(ChunkSampleStream<SsChunkSource> sampleStream) {
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callback.onContinueLoadingRequested(this);
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}
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// Private methods.
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private ChunkSampleStream<SsChunkSource> buildSampleStream(TrackSelection selection,
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long positionUs) {
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int streamElementIndex = trackGroups.indexOf(selection.group);
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SsChunkSource chunkSource = chunkSourceFactory.createChunkSource(manifestLoader, manifest,
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streamElementIndex, selection, trackEncryptionBoxes);
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return new ChunkSampleStream<>(manifest.streamElements[streamElementIndex].type, chunkSource,
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this, allocator, positionUs, minLoadableRetryCount, eventDispatcher);
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}
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private static TrackGroupArray buildTrackGroups(SsManifest manifest) {
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TrackGroup[] trackGroups = new TrackGroup[manifest.streamElements.length];
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for (int i = 0; i < manifest.streamElements.length; i++) {
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trackGroups[i] = new TrackGroup(manifest.streamElements[i].formats);
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}
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return new TrackGroupArray(trackGroups);
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}
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@SuppressWarnings("unchecked")
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private static ChunkSampleStream<SsChunkSource>[] newSampleStreamArray(int length) {
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return new ChunkSampleStream[length];
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}
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private static byte[] getProtectionElementKeyId(byte[] initData) {
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StringBuilder initDataStringBuilder = new StringBuilder();
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for (int i = 0; i < initData.length; i += 2) {
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initDataStringBuilder.append((char) initData[i]);
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}
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String initDataString = initDataStringBuilder.toString();
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String keyIdString = initDataString.substring(
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initDataString.indexOf("<KID>") + 5, initDataString.indexOf("</KID>"));
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byte[] keyId = Base64.decode(keyIdString, Base64.DEFAULT);
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swap(keyId, 0, 3);
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swap(keyId, 1, 2);
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swap(keyId, 4, 5);
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swap(keyId, 6, 7);
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return keyId;
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}
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private static void swap(byte[] data, int firstPosition, int secondPosition) {
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byte temp = data[firstPosition];
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data[firstPosition] = data[secondPosition];
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data[secondPosition] = temp;
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}
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}
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@ -17,24 +17,14 @@ package com.google.android.exoplayer2.source.smoothstreaming;
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import com.google.android.exoplayer2.C;
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import com.google.android.exoplayer2.C;
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import com.google.android.exoplayer2.ParserException;
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import com.google.android.exoplayer2.ParserException;
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import com.google.android.exoplayer2.extractor.mp4.TrackEncryptionBox;
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import com.google.android.exoplayer2.source.AdaptiveMediaSourceEventListener;
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import com.google.android.exoplayer2.source.AdaptiveMediaSourceEventListener;
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import com.google.android.exoplayer2.source.AdaptiveMediaSourceEventListener.EventDispatcher;
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import com.google.android.exoplayer2.source.AdaptiveMediaSourceEventListener.EventDispatcher;
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import com.google.android.exoplayer2.source.CompositeSequenceableLoader;
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import com.google.android.exoplayer2.source.MediaPeriod;
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import com.google.android.exoplayer2.source.MediaPeriod;
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import com.google.android.exoplayer2.source.MediaSource;
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import com.google.android.exoplayer2.source.MediaSource;
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import com.google.android.exoplayer2.source.SampleStream;
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import com.google.android.exoplayer2.source.SequenceableLoader;
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import com.google.android.exoplayer2.source.SinglePeriodTimeline;
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import com.google.android.exoplayer2.source.SinglePeriodTimeline;
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import com.google.android.exoplayer2.source.Timeline;
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import com.google.android.exoplayer2.source.Timeline;
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import com.google.android.exoplayer2.source.TrackGroup;
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import com.google.android.exoplayer2.source.TrackGroupArray;
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import com.google.android.exoplayer2.source.chunk.ChunkSampleStream;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifest.ProtectionElement;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifestParser;
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import com.google.android.exoplayer2.source.smoothstreaming.manifest.SsManifestParser;
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import com.google.android.exoplayer2.trackselection.TrackSelection;
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import com.google.android.exoplayer2.upstream.Allocator;
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import com.google.android.exoplayer2.upstream.DataSource;
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import com.google.android.exoplayer2.upstream.DataSource;
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import com.google.android.exoplayer2.upstream.Loader;
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import com.google.android.exoplayer2.upstream.Loader;
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import com.google.android.exoplayer2.upstream.ParsingLoadable;
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import com.google.android.exoplayer2.upstream.ParsingLoadable;
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@ -44,10 +34,8 @@ import com.google.android.exoplayer2.util.Util;
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import android.net.Uri;
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import android.net.Uri;
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import android.os.Handler;
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import android.os.Handler;
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import android.os.SystemClock;
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import android.os.SystemClock;
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import android.util.Base64;
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import java.io.IOException;
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import java.io.IOException;
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import java.util.List;
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/**
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/**
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* A SmoothStreaming {@link MediaSource}.
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* A SmoothStreaming {@link MediaSource}.
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@ -61,7 +49,6 @@ public final class SsMediaSource implements MediaSource,
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public static final int DEFAULT_MIN_LOADABLE_RETRY_COUNT = 3;
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public static final int DEFAULT_MIN_LOADABLE_RETRY_COUNT = 3;
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private static final int MINIMUM_MANIFEST_REFRESH_PERIOD_MS = 5000;
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private static final int MINIMUM_MANIFEST_REFRESH_PERIOD_MS = 5000;
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private static final int INITIALIZATION_VECTOR_SIZE = 8;
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private final Uri manifestUri;
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private final Uri manifestUri;
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private final DataSource.Factory dataSourceFactory;
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private final DataSource.Factory dataSourceFactory;
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@ -137,214 +124,6 @@ public final class SsMediaSource implements MediaSource,
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}
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}
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}
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}
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// MediaPeriod implementation.
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// TODO: Move into separate file.
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private static class SsMediaPeriod implements MediaPeriod,
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SequenceableLoader.Callback<ChunkSampleStream<SsChunkSource>> {
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private final SsChunkSource.Factory chunkSourceFactory;
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private final Loader manifestLoader;
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private final int minLoadableRetryCount;
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private final EventDispatcher eventDispatcher;
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private final long durationUs;
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private final TrackGroupArray trackGroups;
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private final TrackEncryptionBox[] trackEncryptionBoxes;
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private SsManifest manifest;
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private ChunkSampleStream<SsChunkSource>[] sampleStreams;
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private CompositeSequenceableLoader sequenceableLoader;
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private Callback callback;
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private Allocator allocator;
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public SsMediaPeriod(SsManifest manifest, SsChunkSource.Factory chunkSourceFactory,
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int minLoadableRetryCount, EventDispatcher eventDispatcher, Loader manifestLoader) {
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this.manifest = manifest;
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this.chunkSourceFactory = chunkSourceFactory;
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this.manifestLoader = manifestLoader;
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this.minLoadableRetryCount = minLoadableRetryCount;
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this.eventDispatcher = eventDispatcher;
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durationUs = manifest.durationUs;
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trackGroups = buildTrackGroups(manifest);
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ProtectionElement protectionElement = manifest.protectionElement;
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if (protectionElement != null) {
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byte[] keyId = getProtectionElementKeyId(protectionElement.data);
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trackEncryptionBoxes = new TrackEncryptionBox[] {
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new TrackEncryptionBox(true, INITIALIZATION_VECTOR_SIZE, keyId)};
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} else {
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trackEncryptionBoxes = null;
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}
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}
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public void updateManifest(SsManifest manifest) {
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this.manifest = manifest;
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if (sampleStreams != null) {
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for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
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sampleStream.getChunkSource().updateManifest(manifest);
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}
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callback.onContinueLoadingRequested(this);
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}
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}
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@Override
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public void preparePeriod(Callback callback, Allocator allocator, long positionUs) {
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this.callback = callback;
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this.allocator = allocator;
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||||||
sampleStreams = newSampleStreamArray(0);
|
|
||||||
sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
|
|
||||||
callback.onPeriodPrepared(this);
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public void maybeThrowPrepareError() throws IOException {
|
|
||||||
manifestLoader.maybeThrowError();
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public long getDurationUs() {
|
|
||||||
return durationUs;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public TrackGroupArray getTrackGroups() {
|
|
||||||
return trackGroups;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public SampleStream[] selectTracks(List<SampleStream> oldStreams,
|
|
||||||
List<TrackSelection> newSelections, long positionUs) {
|
|
||||||
int newEnabledSourceCount = sampleStreams.length + newSelections.size() - oldStreams.size();
|
|
||||||
ChunkSampleStream<SsChunkSource>[] newSampleStreams =
|
|
||||||
newSampleStreamArray(newEnabledSourceCount);
|
|
||||||
int newEnabledSourceIndex = 0;
|
|
||||||
|
|
||||||
// Iterate over currently enabled streams, either releasing them or adding them to the new
|
|
||||||
// list.
|
|
||||||
for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
|
|
||||||
if (oldStreams.contains(sampleStream)) {
|
|
||||||
sampleStream.release();
|
|
||||||
} else {
|
|
||||||
newSampleStreams[newEnabledSourceIndex++] = sampleStream;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Instantiate and return new streams.
|
|
||||||
SampleStream[] streamsToReturn = new SampleStream[newSelections.size()];
|
|
||||||
for (int i = 0; i < newSelections.size(); i++) {
|
|
||||||
newSampleStreams[newEnabledSourceIndex] =
|
|
||||||
buildSampleStream(newSelections.get(i), positionUs);
|
|
||||||
streamsToReturn[i] = newSampleStreams[newEnabledSourceIndex];
|
|
||||||
newEnabledSourceIndex++;
|
|
||||||
}
|
|
||||||
|
|
||||||
sampleStreams = newSampleStreams;
|
|
||||||
sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
|
|
||||||
return streamsToReturn;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public boolean continueLoading(long positionUs) {
|
|
||||||
return sequenceableLoader.continueLoading(positionUs);
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public long getNextLoadPositionUs() {
|
|
||||||
return sequenceableLoader.getNextLoadPositionUs();
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public long readDiscontinuity() {
|
|
||||||
return C.UNSET_TIME_US;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public long getBufferedPositionUs() {
|
|
||||||
long bufferedPositionUs = Long.MAX_VALUE;
|
|
||||||
for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
|
|
||||||
long rendererBufferedPositionUs = sampleStream.getBufferedPositionUs();
|
|
||||||
if (rendererBufferedPositionUs != C.END_OF_SOURCE_US) {
|
|
||||||
bufferedPositionUs = Math.min(bufferedPositionUs, rendererBufferedPositionUs);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return bufferedPositionUs == Long.MAX_VALUE ? C.END_OF_SOURCE_US : bufferedPositionUs;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public long seekToUs(long positionUs) {
|
|
||||||
for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
|
|
||||||
sampleStream.seekToUs(positionUs);
|
|
||||||
}
|
|
||||||
return positionUs;
|
|
||||||
}
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public void releasePeriod() {
|
|
||||||
if (sampleStreams != null) {
|
|
||||||
for (ChunkSampleStream<SsChunkSource> sampleStream : sampleStreams) {
|
|
||||||
sampleStream.release();
|
|
||||||
}
|
|
||||||
sampleStreams = null;
|
|
||||||
}
|
|
||||||
sequenceableLoader = null;
|
|
||||||
callback = null;
|
|
||||||
allocator = null;
|
|
||||||
}
|
|
||||||
|
|
||||||
// SequenceableLoader.Callback implementation
|
|
||||||
|
|
||||||
@Override
|
|
||||||
public void onContinueLoadingRequested(ChunkSampleStream<SsChunkSource> sampleStream) {
|
|
||||||
callback.onContinueLoadingRequested(this);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Private methods.
|
|
||||||
|
|
||||||
private ChunkSampleStream<SsChunkSource> buildSampleStream(TrackSelection selection,
|
|
||||||
long positionUs) {
|
|
||||||
int streamElementIndex = trackGroups.indexOf(selection.group);
|
|
||||||
SsChunkSource chunkSource = chunkSourceFactory.createChunkSource(manifestLoader, manifest,
|
|
||||||
streamElementIndex, selection, trackEncryptionBoxes);
|
|
||||||
return new ChunkSampleStream<>(manifest.streamElements[streamElementIndex].type, chunkSource,
|
|
||||||
this, allocator, positionUs, minLoadableRetryCount, eventDispatcher);
|
|
||||||
}
|
|
||||||
|
|
||||||
private static TrackGroupArray buildTrackGroups(SsManifest manifest) {
|
|
||||||
TrackGroup[] trackGroupArray = new TrackGroup[manifest.streamElements.length];
|
|
||||||
for (int i = 0; i < manifest.streamElements.length; i++) {
|
|
||||||
trackGroupArray[i++] = new TrackGroup(manifest.streamElements[i].formats);
|
|
||||||
}
|
|
||||||
return new TrackGroupArray(trackGroupArray);
|
|
||||||
}
|
|
||||||
|
|
||||||
@SuppressWarnings("unchecked")
|
|
||||||
private static ChunkSampleStream<SsChunkSource>[] newSampleStreamArray(int length) {
|
|
||||||
return new ChunkSampleStream[length];
|
|
||||||
}
|
|
||||||
|
|
||||||
private static byte[] getProtectionElementKeyId(byte[] initData) {
|
|
||||||
StringBuilder initDataStringBuilder = new StringBuilder();
|
|
||||||
for (int i = 0; i < initData.length; i += 2) {
|
|
||||||
initDataStringBuilder.append((char) initData[i]);
|
|
||||||
}
|
|
||||||
String initDataString = initDataStringBuilder.toString();
|
|
||||||
String keyIdString = initDataString.substring(
|
|
||||||
initDataString.indexOf("<KID>") + 5, initDataString.indexOf("</KID>"));
|
|
||||||
byte[] keyId = Base64.decode(keyIdString, Base64.DEFAULT);
|
|
||||||
swap(keyId, 0, 3);
|
|
||||||
swap(keyId, 1, 2);
|
|
||||||
swap(keyId, 4, 5);
|
|
||||||
swap(keyId, 6, 7);
|
|
||||||
return keyId;
|
|
||||||
}
|
|
||||||
|
|
||||||
private static void swap(byte[] data, int firstPosition, int secondPosition) {
|
|
||||||
byte temp = data[firstPosition];
|
|
||||||
data[firstPosition] = data[secondPosition];
|
|
||||||
data[secondPosition] = temp;
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
// Loader.Callback implementation
|
// Loader.Callback implementation
|
||||||
|
|
||||||
@Override
|
@Override
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user