CastTrackSelection.java
/*
* Copyright (C) 2021 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.cast;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.Format;
import androidx.media3.common.TrackGroup;
import androidx.media3.common.TrackSelection;
import androidx.media3.common.util.Assertions;
/**
* {@link TrackSelection} that only selects the first track of the provided {@link TrackGroup}.
*
* <p>This relies on {@link CastPlayer} track groups only having one track.
*/
/* package */ class CastTrackSelection implements TrackSelection {
private final TrackGroup trackGroup;
/** @param trackGroup The {@link TrackGroup} from which the first track will only be selected. */
public CastTrackSelection(TrackGroup trackGroup) {
this.trackGroup = trackGroup;
}
@Override
public int getType() {
return TYPE_UNSET;
}
@Override
public TrackGroup getTrackGroup() {
return trackGroup;
}
@Override
public int length() {
return 1;
}
@Override
public Format getFormat(int index) {
Assertions.checkArgument(index == 0);
return trackGroup.getFormat(0);
}
@Override
public int getIndexInTrackGroup(int index) {
return index == 0 ? 0 : C.INDEX_UNSET;
}
@Override
@SuppressWarnings("ReferenceEquality")
public int indexOf(Format format) {
return format == trackGroup.getFormat(0) ? 0 : C.INDEX_UNSET;
}
@Override
public int indexOf(int indexInTrackGroup) {
return indexInTrackGroup == 0 ? 0 : C.INDEX_UNSET;
}
// Object overrides.
@Override
public int hashCode() {
return System.identityHashCode(trackGroup);
}
// Track groups are compared by identity not value, as distinct groups may have the same value.
@Override
@SuppressWarnings({"ReferenceEquality", "EqualsGetClass"})
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
CastTrackSelection other = (CastTrackSelection) obj;
return trackGroup == other.trackGroup;
}
}