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/*
* Copyright (C) 2019 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;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.os.Handler;
/* package */ final class AudioBecomingNoisyManager {
private final Context context;
private final AudioBecomingNoisyReceiver receiver;
private boolean receiverRegistered;
public interface EventListener {
void onAudioBecomingNoisy();
}
public AudioBecomingNoisyManager(Context context, Handler eventHandler, EventListener listener) {
this.context = context.getApplicationContext();
this.receiver = new AudioBecomingNoisyReceiver(eventHandler, listener);
}
/**
* Enables the {@link AudioBecomingNoisyManager} which calls {@link
* EventListener#onAudioBecomingNoisy()} upon receiving an intent of {@link
* AudioManager#ACTION_AUDIO_BECOMING_NOISY}.
*
* @param enabled True if the listener should be notified when audio is becoming noisy.
*/
public void setEnabled(boolean enabled) {
if (enabled && !receiverRegistered) {
context.registerReceiver(
receiver, new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY));
receiverRegistered = true;
} else if (!enabled && receiverRegistered) {
context.unregisterReceiver(receiver);
receiverRegistered = false;
}
}
private final class AudioBecomingNoisyReceiver extends BroadcastReceiver implements Runnable {
private final EventListener listener;
private final Handler eventHandler;
public AudioBecomingNoisyReceiver(Handler eventHandler, EventListener listener) {
this.eventHandler = eventHandler;
this.listener = listener;
}
@Override
public void onReceive(Context context, Intent intent) {
if (AudioManager.ACTION_AUDIO_BECOMING_NOISY.equals(intent.getAction())) {
eventHandler.post(this);
}
}
@Override
public void run() {
if (receiverRegistered) {
listener.onAudioBecomingNoisy();
}
}
}
}
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