| /* |
| * 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 com.google.android.exoplayer2.source; |
| |
| import android.os.Bundle; |
| import androidx.annotation.IntDef; |
| import androidx.annotation.Nullable; |
| import com.google.android.exoplayer2.Bundleable; |
| import com.google.android.exoplayer2.C; |
| import com.google.android.exoplayer2.util.BundleableUtil; |
| import com.google.android.exoplayer2.util.Log; |
| import com.google.common.collect.ImmutableList; |
| import java.lang.annotation.Documented; |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.util.List; |
| |
| /** An immutable array of {@link TrackGroup}s. */ |
| public final class TrackGroupArray implements Bundleable { |
| |
| private static final String TAG = "TrackGroupArray"; |
| |
| /** 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 ImmutableList<TrackGroup> trackGroups; |
| |
| // Lazily initialized hashcode. |
| private int hashCode; |
| |
| /** |
| * Construct a {@code TrackGroupArray} from an array of {@link TrackGroup TrackGroups}. |
| * |
| * <p>The groups must not contain duplicates. |
| */ |
| public TrackGroupArray(TrackGroup... trackGroups) { |
| this.trackGroups = ImmutableList.copyOf(trackGroups); |
| this.length = trackGroups.length; |
| verifyCorrectness(); |
| } |
| |
| /** |
| * Returns the group at a given index. |
| * |
| * @param index The index of the group. |
| * @return The group. |
| */ |
| public TrackGroup get(int index) { |
| return trackGroups.get(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. |
| */ |
| public int indexOf(TrackGroup group) { |
| int index = trackGroups.indexOf(group); |
| return index >= 0 ? index : 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 = trackGroups.hashCode(); |
| } |
| 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 && trackGroups.equals(other.trackGroups); |
| } |
| |
| // Bundleable implementation. |
| |
| @Documented |
| @Retention(RetentionPolicy.SOURCE) |
| @IntDef({ |
| FIELD_TRACK_GROUPS, |
| }) |
| private @interface FieldNumber {} |
| |
| private static final int FIELD_TRACK_GROUPS = 0; |
| |
| @Override |
| public Bundle toBundle() { |
| Bundle bundle = new Bundle(); |
| bundle.putParcelableArrayList( |
| keyForField(FIELD_TRACK_GROUPS), BundleableUtil.toBundleArrayList(trackGroups)); |
| return bundle; |
| } |
| |
| /** Object that can restores a TrackGroupArray from a {@link Bundle}. */ |
| public static final Creator<TrackGroupArray> CREATOR = |
| bundle -> { |
| List<TrackGroup> trackGroups = |
| BundleableUtil.fromBundleNullableList( |
| TrackGroup.CREATOR, |
| bundle.getParcelableArrayList(keyForField(FIELD_TRACK_GROUPS)), |
| /* defaultValue= */ ImmutableList.of()); |
| return new TrackGroupArray(trackGroups.toArray(new TrackGroup[0])); |
| }; |
| |
| private void verifyCorrectness() { |
| for (int i = 0; i < trackGroups.size(); i++) { |
| for (int j = i + 1; j < trackGroups.size(); j++) { |
| if (trackGroups.get(i).equals(trackGroups.get(j))) { |
| Log.e( |
| TAG, |
| "", |
| new IllegalArgumentException( |
| "Multiple identical TrackGroups added to one TrackGroupArray.")); |
| } |
| } |
| } |
| } |
| |
| private static String keyForField(@FieldNumber int field) { |
| return Integer.toString(field, Character.MAX_RADIX); |
| } |
| } |