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/*
* Copyright (C) 2014 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.android.server.telecom;
import static com.android.server.telecom.LogUtils.Events.START_RINBACK;
import static com.android.server.telecom.LogUtils.Events.STOP_RINGBACK;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.util.Preconditions;
import android.telecom.Log;
/**
* Plays ringback tones. Ringback is different from other tones because it operates as the current
* audio for a call, whereas most tones play as simple timed events. This means ringback must be
* able to turn off and on as the user switches between calls. This is why it is implemented as its
* own class.
*/
public class RingbackPlayer {
private final InCallTonePlayer.Factory mPlayerFactory;
/**
* The current call for which the ringback tone is being played.
*/
private Call mCall;
/**
* The currently active player.
*/
private InCallTonePlayer mTonePlayer;
private final Object mLock;
@VisibleForTesting
public RingbackPlayer(InCallTonePlayer.Factory playerFactory) {
mPlayerFactory = playerFactory;
mLock = new Object();
}
/**
* Starts ringback for the specified dialing call as needed.
*
* @param call The call for which to ringback.
*/
public void startRingbackForCall(Call call) {
synchronized (mLock) {
Preconditions.checkState(call.getState() == CallState.DIALING);
if (mCall == call) {
Log.w(this, "Ignoring duplicate requests to ring for %s.", call);
return;
}
if (mCall != null) {
// We only get here for the foreground call so, there's no reason why there should
// exist a current dialing call.
Log.wtf(this, "Ringback player thinks there are two foreground-dialing calls.");
}
mCall = call;
if (mTonePlayer == null) {
Log.i(this, "Playing the ringback tone for %s.", call);
Log.addEvent(call, START_RINBACK);
mTonePlayer = mPlayerFactory.createPlayer(InCallTonePlayer.TONE_RING_BACK);
mTonePlayer.startTone();
}
}
}
/**
* Stops the ringback for the specified dialing call as needed.
*
* @param call The call for which to stop ringback.
*/
public void stopRingbackForCall(Call call) {
synchronized (mLock) {
if (mCall == call) {
// The foreground call is no longer dialing or is no longer the foreground call. In
// either case, stop the ringback tone.
mCall = null;
if (mTonePlayer == null) {
Log.w(this, "No player found to stop.");
} else {
Log.i(this, "Stopping the ringback tone for %s.", call);
Log.addEvent(call, STOP_RINGBACK);
mTonePlayer.stopTone();
mTonePlayer = null;
}
}
}
}
public boolean isRingbackPlaying() {
synchronized (mLock) {
return mTonePlayer != null;
}
}
}
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