FakeTrackSelector.java
/*
* Copyright (C) 2017 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.test.utils;
import androidx.media3.common.Timeline;
import androidx.media3.common.TrackGroup;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.exoplayer.RendererCapabilities.AdaptiveSupport;
import androidx.media3.exoplayer.RendererCapabilities.Capabilities;
import androidx.media3.exoplayer.source.MediaSource.MediaPeriodId;
import androidx.media3.exoplayer.source.TrackGroupArray;
import androidx.media3.exoplayer.trackselection.DefaultTrackSelector;
import androidx.media3.exoplayer.trackselection.ExoTrackSelection;
import androidx.media3.exoplayer.trackselection.MappingTrackSelector;
import androidx.media3.exoplayer.upstream.BandwidthMeter;
import androidx.test.core.app.ApplicationProvider;
import java.util.ArrayList;
import java.util.List;
import org.checkerframework.checker.nullness.compatqual.NullableType;
/** A fake {@link MappingTrackSelector} that returns {@link FakeTrackSelection}s. */
@UnstableApi
public class FakeTrackSelector extends DefaultTrackSelector {
private final FakeTrackSelectionFactory fakeTrackSelectionFactory;
public FakeTrackSelector() {
this(/* mayReuseTrackSelection= */ false);
}
/**
* @param mayReuseTrackSelection Whether this {@link FakeTrackSelector} will reuse {@link
* ExoTrackSelection}s during track selection, when it finds previously-selected track
* selection using the same {@link TrackGroup}.
*/
public FakeTrackSelector(boolean mayReuseTrackSelection) {
this(new FakeTrackSelectionFactory(mayReuseTrackSelection));
}
private FakeTrackSelector(FakeTrackSelectionFactory fakeTrackSelectionFactory) {
super(ApplicationProvider.getApplicationContext(), fakeTrackSelectionFactory);
this.fakeTrackSelectionFactory = fakeTrackSelectionFactory;
}
@Override
protected ExoTrackSelection.@NullableType Definition[] selectAllTracks(
MappedTrackInfo mappedTrackInfo,
@Capabilities int[][][] rendererFormatSupports,
@AdaptiveSupport int[] rendererMixedMimeTypeAdaptationSupports,
Parameters params) {
int rendererCount = mappedTrackInfo.getRendererCount();
ExoTrackSelection.@NullableType Definition[] definitions =
new ExoTrackSelection.Definition[rendererCount];
for (int i = 0; i < rendererCount; i++) {
TrackGroupArray trackGroupArray = mappedTrackInfo.getTrackGroups(i);
boolean hasTracks = trackGroupArray.length > 0;
definitions[i] =
hasTracks
? new ExoTrackSelection.Definition(trackGroupArray.get(0), /* tracks...= */ 0)
: null;
}
return definitions;
}
/** Returns list of all {@link FakeTrackSelection}s that this track selector has made so far. */
public List<FakeTrackSelection> getAllTrackSelections() {
return fakeTrackSelectionFactory.trackSelections;
}
private static class FakeTrackSelectionFactory implements ExoTrackSelection.Factory {
private final List<FakeTrackSelection> trackSelections;
private final boolean mayReuseTrackSelection;
public FakeTrackSelectionFactory(boolean mayReuseTrackSelection) {
this.mayReuseTrackSelection = mayReuseTrackSelection;
trackSelections = new ArrayList<>();
}
@Override
public ExoTrackSelection[] createTrackSelections(
ExoTrackSelection.@NullableType Definition[] definitions,
BandwidthMeter bandwidthMeter,
MediaPeriodId mediaPeriodId,
Timeline timeline) {
ExoTrackSelection[] selections = new ExoTrackSelection[definitions.length];
for (int i = 0; i < definitions.length; i++) {
ExoTrackSelection.Definition definition = definitions[i];
if (definition != null) {
selections[i] = createTrackSelection(definition.group);
}
}
return selections;
}
private ExoTrackSelection createTrackSelection(TrackGroup trackGroup) {
if (mayReuseTrackSelection) {
for (FakeTrackSelection trackSelection : trackSelections) {
if (trackSelection.getTrackGroup().equals(trackGroup)) {
return trackSelection;
}
}
}
FakeTrackSelection trackSelection = new FakeTrackSelection(trackGroup);
trackSelections.add(trackSelection);
return trackSelection;
}
}
}