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73400907fc
This change replaces TrackGroup[] with TrackGroupArray. This is to allow equality based hashCode and equals implementations. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=115563146
99 lines
2.8 KiB
Java
99 lines
2.8 KiB
Java
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.android.exoplayer;
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import com.google.android.exoplayer.util.Assertions;
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import java.util.Arrays;
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/**
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* Defines a group of tracks exposed by a {@link SampleSource}.
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* <p>
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* A {@link SampleSource} is only able to provide one {@link TrackStream} corresponding to a group
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* at any given time. If {@link #adaptive} is true this {@link TrackStream} can adapt between
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* multiple tracks within the group. If {@link #adaptive} is false then it's only possible to
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* consume one track from the group at a given time.
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*/
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public final class TrackGroup {
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/**
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* The number of tracks in the group. Always greater than zero.
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*/
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public final int length;
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/**
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* Whether it's possible to adapt between multiple tracks in the group.
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*/
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public final boolean adaptive;
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private final Format[] formats;
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// Lazily initialized hashcode.
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private int hashCode;
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/**
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* @param format The format of the single track.
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*/
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public TrackGroup(Format format) {
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this(false, Assertions.checkNotNull(format));
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}
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/**
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* @param adaptive Whether it's possible to adapt between multiple tracks in the group.
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* @param formats The track formats. Must not be null or empty. Must not contain null elements.
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*/
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public TrackGroup(boolean adaptive, Format... formats) {
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Assertions.checkState(formats.length > 0);
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this.adaptive = adaptive;
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this.formats = formats;
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length = formats.length;
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}
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/**
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* Gets the format of the track at a given index.
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*
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* @param index The index of the track.
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* @return The track's format.
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*/
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public Format getFormat(int index) {
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return formats[index];
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}
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@Override
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public int hashCode() {
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if (hashCode == 0) {
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int result = 17;
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result = 31 * result + (adaptive ? 1231 : 1237);
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result = 31 * result + Arrays.hashCode(formats);
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result = 31 * result + length;
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hashCode = result;
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}
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return hashCode;
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}
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@Override
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public boolean equals(Object obj) {
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if (this == obj) {
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return true;
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}
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if (obj == null || getClass() != obj.getClass()) {
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return false;
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}
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TrackGroup other = (TrackGroup) obj;
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return adaptive == other.adaptive && length == other.length
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&& Arrays.equals(formats, other.formats);
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}
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}
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