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/*
* 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 org.mozilla.thirdparty.com.google.android.exoplayer2.source;
import android.os.Parcel;
import android.os.Parcelable;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import java.util.Arrays;
/** An array of {@link TrackGroup}s exposed by a {@link MediaPeriod}. */
public final class TrackGroupArray implements Parcelable {
/**
* The empty array.
*/
public static final TrackGroupArray EMPTY = new TrackGroupArray();
/**
* The number of groups in the array. Greater than or equal to zero.
*/
public final int length;
private final TrackGroup[] trackGroups;
// Lazily initialized hashcode.
private int hashCode;
/**
* @param trackGroups The groups. Must not be null or contain null elements, but may be empty.
*/
public TrackGroupArray(TrackGroup... trackGroups) {
this.trackGroups = trackGroups;
this.length = trackGroups.length;
}
/* package */ TrackGroupArray(Parcel in) {
length = in.readInt();
trackGroups = new TrackGroup[length];
for (int i = 0; i < length; i++) {
trackGroups[i] = in.readParcelable(TrackGroup.class.getClassLoader());
}
}
/**
* Returns the group at a given index.
*
* @param index The index of the group.
* @return The group.
*/
public TrackGroup get(int index) {
return trackGroups[index];
}
/**
* Returns the index of a group within the array.
*
* @param group The group.
* @return The index of the group, or {@link C#INDEX_UNSET} if no such group exists.
*/
@SuppressWarnings("ReferenceEquality")
public int indexOf(TrackGroup group) {
for (int i = 0; i < length; i++) {
// Suppressed reference equality warning because this is looking for the index of a specific
// TrackGroup object, not the index of a potential equal TrackGroup.
if (trackGroups[i] == group) {
return i;
}
}
return C.INDEX_UNSET;
}
/**
* Returns whether this track group array is empty.
*/
public boolean isEmpty() {
return length == 0;
}
@Override
public int hashCode() {
if (hashCode == 0) {
hashCode = Arrays.hashCode(trackGroups);
}
return hashCode;
}
@Override
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
TrackGroupArray other = (TrackGroupArray) obj;
return length == other.length && Arrays.equals(trackGroups, other.trackGroups);
}
// Parcelable implementation.
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(length);
for (int i = 0; i < length; i++) {
dest.writeParcelable(trackGroups[i], 0);
}
}
public static final Parcelable.Creator<TrackGroupArray> CREATOR =
new Parcelable.Creator<TrackGroupArray>() {
@Override
public TrackGroupArray createFromParcel(Parcel in) {
return new TrackGroupArray(in);
}
@Override
public TrackGroupArray[] newArray(int size) {
return new TrackGroupArray[size];
}
};
}
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