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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.metadata;
import android.os.Parcel;
import android.os.Parcelable;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
import java.util.Arrays;
import java.util.List;
/**
* A collection of metadata entries.
*/
public final class Metadata implements Parcelable {
/** A metadata entry. */
public interface Entry extends Parcelable {
/**
* Returns the {@link Format} that can be used to decode the wrapped metadata in {@link
* #getWrappedMetadataBytes()}, or null if this Entry doesn't contain wrapped metadata.
*/
@Nullable
default Format getWrappedMetadataFormat() {
return null;
}
/**
* Returns the bytes of the wrapped metadata in this Entry, or null if it doesn't contain
* wrapped metadata.
*/
@Nullable
default byte[] getWrappedMetadataBytes() {
return null;
}
}
private final Entry[] entries;
/**
* @param entries The metadata entries.
*/
public Metadata(Entry... entries) {
this.entries = entries;
}
/**
* @param entries The metadata entries.
*/
public Metadata(List<? extends Entry> entries) {
this.entries = new Entry[entries.size()];
entries.toArray(this.entries);
}
/* package */ Metadata(Parcel in) {
entries = new Metadata.Entry[in.readInt()];
for (int i = 0; i < entries.length; i++) {
entries[i] = in.readParcelable(Entry.class.getClassLoader());
}
}
/**
* Returns the number of metadata entries.
*/
public int length() {
return entries.length;
}
/**
* Returns the entry at the specified index.
*
* @param index The index of the entry.
* @return The entry at the specified index.
*/
public Metadata.Entry get(int index) {
return entries[index];
}
/**
* Returns a copy of this metadata with the entries of the specified metadata appended. Returns
* this instance if {@code other} is null.
*
* @param other The metadata that holds the entries to append. If null, this methods returns this
* instance.
* @return The metadata instance with the appended entries.
*/
public Metadata copyWithAppendedEntriesFrom(@Nullable Metadata other) {
if (other == null) {
return this;
}
return copyWithAppendedEntries(other.entries);
}
/**
* Returns a copy of this metadata with the specified entries appended.
*
* @param entriesToAppend The entries to append.
* @return The metadata instance with the appended entries.
*/
public Metadata copyWithAppendedEntries(Entry... entriesToAppend) {
if (entriesToAppend.length == 0) {
return this;
}
return new Metadata(Util.nullSafeArrayConcatenation(entries, entriesToAppend));
}
@Override
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
Metadata other = (Metadata) obj;
return Arrays.equals(entries, other.entries);
}
@Override
public int hashCode() {
return Arrays.hashCode(entries);
}
@Override
public String toString() {
return "entries=" + Arrays.toString(entries);
}
// Parcelable implementation.
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(entries.length);
for (Entry entry : entries) {
dest.writeParcelable(entry, 0);
}
}
public static final Parcelable.Creator<Metadata> CREATOR =
new Parcelable.Creator<Metadata>() {
@Override
public Metadata createFromParcel(Parcel in) {
return new Metadata(in);
}
@Override
public Metadata[] newArray(int size) {
return new Metadata[size];
}
};
}
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