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/*
* Copyright (C) 2017 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.emsg;
import static org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util.castNonNull;
import android.os.Parcel;
import android.os.Parcelable;
import androidx.annotation.Nullable;
import androidx.annotation.VisibleForTesting;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Format;
import org.mozilla.thirdparty.com.google.android.exoplayer2.metadata.Metadata;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.MimeTypes;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Util;
import java.util.Arrays;
/** An Event Message (emsg) as defined in ISO 23009-1. */
public final class EventMessage implements Metadata.Entry {
/**
* emsg scheme_id_uri from the <a href="https://aomediacodec.github.io/av1-id3/#semantics">CMAF
* spec</a>.
*/
@VisibleForTesting public static final String ID3_SCHEME_ID_AOM = "https://aomedia.org/emsg/ID3";
/**
* The Apple-hosted scheme_id equivalent to {@code ID3_SCHEME_ID_AOM} - used before AOM adoption.
*/
private static final String ID3_SCHEME_ID_APPLE =
"https://developer.apple.com/streaming/emsg-id3";
/**
* scheme_id_uri from section 7.3.2 of <a
* href="https://www.scte.org/SCTEDocs/Standards/ANSI_SCTE%20214-3%202015.pdf">SCTE 214-3
* 2015</a>.
*/
@VisibleForTesting public static final String SCTE35_SCHEME_ID = "urn:scte:scte35:2014:bin";
private static final Format ID3_FORMAT =
Format.createSampleFormat(
/* id= */ null, MimeTypes.APPLICATION_ID3, Format.OFFSET_SAMPLE_RELATIVE);
private static final Format SCTE35_FORMAT =
Format.createSampleFormat(
/* id= */ null, MimeTypes.APPLICATION_SCTE35, Format.OFFSET_SAMPLE_RELATIVE);
/** The message scheme. */
public final String schemeIdUri;
/**
* The value for the event.
*/
public final String value;
/**
* The duration of the event in milliseconds.
*/
public final long durationMs;
/**
* The instance identifier.
*/
public final long id;
/**
* The body of the message.
*/
public final byte[] messageData;
// Lazily initialized hashcode.
private int hashCode;
/**
* @param schemeIdUri The message scheme.
* @param value The value for the event.
* @param durationMs The duration of the event in milliseconds.
* @param id The instance identifier.
* @param messageData The body of the message.
*/
public EventMessage(
String schemeIdUri, String value, long durationMs, long id, byte[] messageData) {
this.schemeIdUri = schemeIdUri;
this.value = value;
this.durationMs = durationMs;
this.id = id;
this.messageData = messageData;
}
/* package */ EventMessage(Parcel in) {
schemeIdUri = castNonNull(in.readString());
value = castNonNull(in.readString());
durationMs = in.readLong();
id = in.readLong();
messageData = castNonNull(in.createByteArray());
}
@Override
@Nullable
public Format getWrappedMetadataFormat() {
switch (schemeIdUri) {
case ID3_SCHEME_ID_AOM:
case ID3_SCHEME_ID_APPLE:
return ID3_FORMAT;
case SCTE35_SCHEME_ID:
return SCTE35_FORMAT;
default:
return null;
}
}
@Override
@Nullable
public byte[] getWrappedMetadataBytes() {
return getWrappedMetadataFormat() != null ? messageData : null;
}
@Override
public int hashCode() {
if (hashCode == 0) {
int result = 17;
result = 31 * result + (schemeIdUri != null ? schemeIdUri.hashCode() : 0);
result = 31 * result + (value != null ? value.hashCode() : 0);
result = 31 * result + (int) (durationMs ^ (durationMs >>> 32));
result = 31 * result + (int) (id ^ (id >>> 32));
result = 31 * result + Arrays.hashCode(messageData);
hashCode = result;
}
return hashCode;
}
@Override
public boolean equals(@Nullable Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
EventMessage other = (EventMessage) obj;
return durationMs == other.durationMs
&& id == other.id
&& Util.areEqual(schemeIdUri, other.schemeIdUri)
&& Util.areEqual(value, other.value)
&& Arrays.equals(messageData, other.messageData);
}
@Override
public String toString() {
return "EMSG: scheme="
+ schemeIdUri
+ ", id="
+ id
+ ", durationMs="
+ durationMs
+ ", value="
+ value;
}
// Parcelable implementation.
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(schemeIdUri);
dest.writeString(value);
dest.writeLong(durationMs);
dest.writeLong(id);
dest.writeByteArray(messageData);
}
public static final Parcelable.Creator<EventMessage> CREATOR =
new Parcelable.Creator<EventMessage>() {
@Override
public EventMessage createFromParcel(Parcel in) {
return new EventMessage(in);
}
@Override
public EventMessage[] newArray(int size) {
return new EventMessage[size];
}
};
}
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