FixedTrackSelection.java
/*
* 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 androidx.media3.exoplayer.trackselection;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.TrackGroup;
import androidx.media3.common.TrackSelection;
import androidx.media3.common.util.UnstableApi;
import androidx.media3.exoplayer.source.chunk.MediaChunk;
import androidx.media3.exoplayer.source.chunk.MediaChunkIterator;
import java.util.List;
/** A {@link TrackSelection} consisting of a single track. */
@UnstableApi
public final class FixedTrackSelection extends BaseTrackSelection {
private final int reason;
@Nullable private final Object data;
/**
* @param group The {@link TrackGroup}. Must not be null.
* @param track The index of the selected track within the {@link TrackGroup}.
*/
public FixedTrackSelection(TrackGroup group, int track) {
this(group, /* track= */ track, /* type= */ TrackSelection.TYPE_UNSET);
}
/**
* @param group The {@link TrackGroup}. Must not be null.
* @param track The index of the selected track within the {@link TrackGroup}.
* @param type The type that will be returned from {@link TrackSelection#getType()}.
*/
public FixedTrackSelection(TrackGroup group, int track, @Type int type) {
this(group, track, type, C.SELECTION_REASON_UNKNOWN, /* data= */ null);
}
/**
* @param group The {@link TrackGroup}. Must not be null.
* @param track The index of the selected track within the {@link TrackGroup}.
* @param type The type that will be returned from {@link TrackSelection#getType()}.
* @param reason A reason for the track selection.
* @param data Optional data associated with the track selection.
*/
public FixedTrackSelection(
TrackGroup group, int track, @Type int type, int reason, @Nullable Object data) {
super(group, /* tracks= */ new int[] {track}, type);
this.reason = reason;
this.data = data;
}
@Override
public void updateSelectedTrack(
long playbackPositionUs,
long bufferedDurationUs,
long availableDurationUs,
List<? extends MediaChunk> queue,
MediaChunkIterator[] mediaChunkIterators) {
// Do nothing.
}
@Override
public int getSelectedIndex() {
return 0;
}
@Override
public int getSelectionReason() {
return reason;
}
@Override
@Nullable
public Object getSelectionData() {
return data;
}
}