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/*
* Copyright (C) 2016 The CyanogenMod 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.cyanogenmod.audiofx.service;
import static android.media.AudioDeviceInfo.convertDeviceTypeToInternalDevice;
import android.content.Context;
import android.media.AudioDeviceCallback;
import android.media.AudioDeviceInfo;
import android.media.AudioManager;
import android.os.Handler;
import android.util.Log;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class AudioOutputChangeListener extends AudioDeviceCallback {
private static final String TAG = "AudioFx-" + AudioOutputChangeListener.class.getSimpleName();
private boolean mInitial = true;
private final Context mContext;
private final AudioManager mAudioManager;
private final Handler mHandler;
private int mLastDevice = -1;
private final ArrayList<AudioOutputChangedCallback> mCallbacks = new ArrayList<AudioOutputChangedCallback>();
public interface AudioOutputChangedCallback {
public void onAudioOutputChanged(boolean firstChange, AudioDeviceInfo outputDevice);
}
public AudioOutputChangeListener(Context context, Handler handler) {
mContext = context;
mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
mHandler = handler;
}
public void addCallback(AudioOutputChangedCallback... callbacks) {
synchronized (mCallbacks) {
boolean initial = mCallbacks.size() == 0;
mCallbacks.addAll(Arrays.asList(callbacks));
if (initial) {
mAudioManager.registerAudioDeviceCallback(this, mHandler);
}
}
}
public void removeCallback(AudioOutputChangedCallback... callbacks) {
synchronized (mCallbacks) {
mCallbacks.removeAll(Arrays.asList(callbacks));
if (mCallbacks.size() == 0) {
mAudioManager.unregisterAudioDeviceCallback(this);
}
}
}
private void callback() {
synchronized (mCallbacks) {
final AudioDeviceInfo device = getCurrentDevice();
if (device == null) {
Log.w(TAG, "Unable to determine audio device!");
return;
}
if (mInitial || device.getId() != mLastDevice) {
Log.d(TAG, "onAudioOutputChanged id: " + device.getId() +
" type: " + device.getType() +
" name: " + device.getProductName() +
" address: " + device.getAddress() +
" [" + device.toString() + "]");
mLastDevice = device.getId();
mHandler.post(new Runnable() {
@Override
public void run() {
synchronized (mCallbacks) {
for (AudioOutputChangedCallback callback : mCallbacks) {
callback.onAudioOutputChanged(mInitial, device);
}
}
}
});
if (mInitial) {
mInitial = false;
}
}
}
}
public void refresh() {
callback();
}
@Override
public void onAudioDevicesAdded(AudioDeviceInfo[] addedDevices) {
callback();
}
@Override
public void onAudioDevicesRemoved(AudioDeviceInfo[] removedDevices) {
callback();
}
public List<AudioDeviceInfo> getConnectedOutputs() {
final List<AudioDeviceInfo> outputs = new ArrayList<AudioDeviceInfo>();
final int forMusic = mAudioManager.getDevicesForStream(AudioManager.STREAM_MUSIC);
for (AudioDeviceInfo ai : mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
if ((convertDeviceTypeToInternalDevice(ai.getType()) & forMusic) > 0) {
outputs.add(ai);
}
}
return outputs;
}
public AudioDeviceInfo getCurrentDevice() {
final List<AudioDeviceInfo> devices = getConnectedOutputs();
return devices.size() > 0 ? devices.get(0) : null;
}
public AudioDeviceInfo getDeviceById(int id) {
for (AudioDeviceInfo ai : mAudioManager.getDevices(AudioManager.GET_DEVICES_OUTPUTS)) {
if (ai.getId() == id) {
return ai;
}
}
return null;
}
}
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