core/java/android/server/BluetoothA2dpService.java - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2008 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.
  */

 /**
  * TODO: Move this to services.jar
  * and make the contructor package private again.
  * @hide
  */

 package android.server;

 import android.bluetooth.BluetoothA2dp;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothError;
 import android.bluetooth.BluetoothIntent;
 import android.bluetooth.BluetoothUuid;
 import android.bluetooth.IBluetoothA2dp;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.media.AudioManager;
 import android.os.Handler;
 import android.os.Message;
 import android.provider.Settings;
 import android.util.Log;

 import java.io.FileDescriptor;
 import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.UUID;

 public class BluetoothA2dpService extends IBluetoothA2dp.Stub {
     private static final String TAG = "BluetoothA2dpService";
     private static final boolean DBG = true;

     public static final String BLUETOOTH_A2DP_SERVICE = "bluetooth_a2dp";

     private static final String BLUETOOTH_ADMIN_PERM = android.Manifest.permission.BLUETOOTH_ADMIN;
     private static final String BLUETOOTH_PERM = android.Manifest.permission.BLUETOOTH;

     private static final String BLUETOOTH_ENABLED = "bluetooth_enabled";

     private static final int MESSAGE_CONNECT_TO = 1;

     private static final String PROPERTY_STATE = "State";

     private static final String SINK_STATE_DISCONNECTED = "disconnected";
     private static final String SINK_STATE_CONNECTING = "connecting";
     private static final String SINK_STATE_CONNECTED = "connected";
     private static final String SINK_STATE_PLAYING = "playing";

     private static int mSinkCount;

     private final Context mContext;
     private final IntentFilter mIntentFilter;
     private HashMap<BluetoothDevice, Integer> mAudioDevices;
     private final AudioManager mAudioManager;
     private final BluetoothService mBluetoothService;
     private final BluetoothAdapter mAdapter;

     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
             BluetoothDevice device =
                     intent.getParcelableExtra(BluetoothIntent.DEVICE);
             if (action.equals(BluetoothIntent.BLUETOOTH_STATE_CHANGED_ACTION)) {
                 int state = intent.getIntExtra(BluetoothIntent.BLUETOOTH_STATE,
                                                BluetoothError.ERROR);
                 switch (state) {
                 case BluetoothAdapter.BLUETOOTH_STATE_ON:
                     onBluetoothEnable();
                     break;
                 case BluetoothAdapter.BLUETOOTH_STATE_TURNING_OFF:
                     onBluetoothDisable();
                     break;
                 }
             } else if (action.equals(BluetoothIntent.BOND_STATE_CHANGED_ACTION)) {
                 int bondState = intent.getIntExtra(BluetoothIntent.BOND_STATE,
                                                    BluetoothError.ERROR);
                 switch(bondState) {
                 case BluetoothDevice.BOND_BONDED:
                     setSinkPriority(device, BluetoothA2dp.PRIORITY_AUTO);
                     break;
                 case BluetoothDevice.BOND_BONDING:
                 case BluetoothDevice.BOND_NOT_BONDED:
                     setSinkPriority(device, BluetoothA2dp.PRIORITY_OFF);
                     break;
                 }
             } else if (action.equals(BluetoothIntent.REMOTE_DEVICE_CONNECTED_ACTION)) {
                 if (getSinkPriority(device) > BluetoothA2dp.PRIORITY_OFF &&
                         isSinkDevice(device)) {
                     // This device is a preferred sink. Make an A2DP connection
                     // after a delay. We delay to avoid connection collisions,
                     // and to give other profiles such as HFP a chance to
                     // connect first.
                     Message msg = Message.obtain(mHandler, MESSAGE_CONNECT_TO, device);
                     mHandler.sendMessageDelayed(msg, 6000);
                 }
             }
         }
     };

     public BluetoothA2dpService(Context context, BluetoothService bluetoothService) {
         mContext = context;

         mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

         mBluetoothService = bluetoothService;
         if (mBluetoothService == null) {
             throw new RuntimeException("Platform does not support Bluetooth");
         }

         if (!initNative()) {
             throw new RuntimeException("Could not init BluetoothA2dpService");
         }

         mAdapter = (BluetoothAdapter) context.getSystemService(Context.BLUETOOTH_SERVICE);

         mIntentFilter = new IntentFilter(BluetoothIntent.BLUETOOTH_STATE_CHANGED_ACTION);
         mIntentFilter.addAction(BluetoothIntent.BOND_STATE_CHANGED_ACTION);
         mIntentFilter.addAction(BluetoothIntent.REMOTE_DEVICE_CONNECTED_ACTION);
         mContext.registerReceiver(mReceiver, mIntentFilter);

         mAudioDevices = new HashMap<BluetoothDevice, Integer>();

         if (mBluetoothService.isEnabled())
             onBluetoothEnable();
     }

     @Override
     protected void finalize() throws Throwable {
         try {
             cleanupNative();
         } finally {
             super.finalize();
         }
     }

     private final Handler mHandler = new Handler() {
         @Override
         public void handleMessage(Message msg) {
             switch (msg.what) {
             case MESSAGE_CONNECT_TO:
                 BluetoothDevice device = (BluetoothDevice) msg.obj;
                 // check bluetooth is still on, device is still preferred, and
                 // nothing is currently connected
                 if (mBluetoothService.isEnabled() &&
                         getSinkPriority(device) > BluetoothA2dp.PRIORITY_OFF &&
                         lookupSinksMatchingStates(new int[] {
                             BluetoothA2dp.STATE_CONNECTING,
                             BluetoothA2dp.STATE_CONNECTED,
                             BluetoothA2dp.STATE_PLAYING,
                             BluetoothA2dp.STATE_DISCONNECTING}).size() == 0) {
                     log("Auto-connecting A2DP to sink " + device);
                     connectSink(device);
                 }
                 break;
             }
         }
     };

     private int convertBluezSinkStringtoState(String value) {
         if (value.equalsIgnoreCase("disconnected"))
             return BluetoothA2dp.STATE_DISCONNECTED;
         if (value.equalsIgnoreCase("connecting"))
             return BluetoothA2dp.STATE_CONNECTING;
         if (value.equalsIgnoreCase("connected"))
             return BluetoothA2dp.STATE_CONNECTED;
         if (value.equalsIgnoreCase("playing"))
             return BluetoothA2dp.STATE_PLAYING;
         return -1;
     }

     private boolean isSinkDevice(BluetoothDevice device) {
         String uuids[] = mBluetoothService.getRemoteUuids(device.getAddress());
         UUID uuid;
         if (uuids != null) {
             for (String deviceUuid: uuids) {
                 uuid = UUID.fromString(deviceUuid);
                 if (BluetoothUuid.isAudioSink(uuid)) {
                     return true;
                 }
             }
         }
         return false;
     }

     private synchronized boolean addAudioSink (BluetoothDevice device) {
         String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
         String propValues[] = (String []) getSinkPropertiesNative(path);
         if (propValues == null) {
             Log.e(TAG, "Error while getting AudioSink properties for device: " + device);
             return false;
         }
         Integer state = null;
         // Properties are name-value pairs
         for (int i = 0; i < propValues.length; i+=2) {
             if (propValues[i].equals(PROPERTY_STATE)) {
                 state = new Integer(convertBluezSinkStringtoState(propValues[i+1]));
                 break;
             }
         }
         mAudioDevices.put(device, state);
         handleSinkStateChange(device, BluetoothA2dp.STATE_DISCONNECTED, state);
         return true;
     }

     private synchronized void onBluetoothEnable() {
         String devices = mBluetoothService.getProperty("Devices");
         mSinkCount = 0;
         if (devices != null) {
             String [] paths = devices.split(",");
             for (String path: paths) {
                 String address = mBluetoothService.getAddressFromObjectPath(path);
                 BluetoothDevice device = mAdapter.getRemoteDevice(address);
                 String []uuids = mBluetoothService.getRemoteUuids(address);
                 if (uuids != null)
                     for (String uuid: uuids) {
                         UUID remoteUuid = UUID.fromString(uuid);
                         if (BluetoothUuid.isAudioSink(remoteUuid) ||
                             BluetoothUuid.isAudioSource(remoteUuid) ||
                             BluetoothUuid.isAdvAudioDist(remoteUuid)) {
                             addAudioSink(device);
                             break;
                         }
                     }
             }
         }
         mAudioManager.setParameters(BLUETOOTH_ENABLED+"=true");
     }

     private synchronized void onBluetoothDisable() {
         if (!mAudioDevices.isEmpty()) {
             BluetoothDevice[] devices = new BluetoothDevice[mAudioDevices.size()];
             devices = mAudioDevices.keySet().toArray(devices);
             for (BluetoothDevice device : devices) {
                 int state = getSinkState(device);
                 switch (state) {
                     case BluetoothA2dp.STATE_CONNECTING:
                     case BluetoothA2dp.STATE_CONNECTED:
                     case BluetoothA2dp.STATE_PLAYING:
                         disconnectSinkNative(mBluetoothService.getObjectPathFromAddress(
                                 device.getAddress()));
                         handleSinkStateChange(device, state, BluetoothA2dp.STATE_DISCONNECTED);
                         break;
                     case BluetoothA2dp.STATE_DISCONNECTING:
                         handleSinkStateChange(device, BluetoothA2dp.STATE_DISCONNECTING,
                                               BluetoothA2dp.STATE_DISCONNECTED);
                         break;
                 }
             }
             mAudioDevices.clear();
         }

         mAudioManager.setParameters(BLUETOOTH_ENABLED + "=false");
     }

     public synchronized int connectSink(BluetoothDevice device) {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                                 "Need BLUETOOTH_ADMIN permission");
         if (DBG) log("connectSink(" + device + ")");

         // ignore if there are any active sinks
         if (lookupSinksMatchingStates(new int[] {
                 BluetoothA2dp.STATE_CONNECTING,
                 BluetoothA2dp.STATE_CONNECTED,
                 BluetoothA2dp.STATE_PLAYING,
                 BluetoothA2dp.STATE_DISCONNECTING}).size() != 0) {
             return BluetoothError.ERROR;
         }

         if (mAudioDevices.get(device) == null && !addAudioSink(device))
             return BluetoothError.ERROR;

         int state = mAudioDevices.get(device);

         switch (state) {
         case BluetoothA2dp.STATE_CONNECTED:
         case BluetoothA2dp.STATE_PLAYING:
         case BluetoothA2dp.STATE_DISCONNECTING:
             return BluetoothError.ERROR;
         case BluetoothA2dp.STATE_CONNECTING:
             return BluetoothError.SUCCESS;
         }

         String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
         if (path == null)
             return BluetoothError.ERROR;

         // State is DISCONNECTED
         if (!connectSinkNative(path)) {
             return BluetoothError.ERROR;
         }
         return BluetoothError.SUCCESS;
     }

     public synchronized int disconnectSink(BluetoothDevice device) {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                                 "Need BLUETOOTH_ADMIN permission");
         if (DBG) log("disconnectSink(" + device + ")");

         String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
         if (path == null) {
             return BluetoothError.ERROR;
         }

         switch (getSinkState(device)) {
         case BluetoothA2dp.STATE_DISCONNECTED:
             return BluetoothError.ERROR;
         case BluetoothA2dp.STATE_DISCONNECTING:
             return BluetoothError.SUCCESS;
         }

         // State is CONNECTING or CONNECTED or PLAYING
         if (!disconnectSinkNative(path)) {
             return BluetoothError.ERROR;
         } else {
             return BluetoothError.SUCCESS;
         }
     }

     public synchronized BluetoothDevice[] getConnectedSinks() {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         Set<BluetoothDevice> sinks = lookupSinksMatchingStates(
                 new int[] {BluetoothA2dp.STATE_CONNECTED, BluetoothA2dp.STATE_PLAYING});
         return sinks.toArray(new BluetoothDevice[sinks.size()]);
     }

     public synchronized int getSinkState(BluetoothDevice device) {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         Integer state = mAudioDevices.get(device);
         if (state == null)
             return BluetoothA2dp.STATE_DISCONNECTED;
         return state;
     }

     public synchronized int getSinkPriority(BluetoothDevice device) {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return Settings.Secure.getInt(mContext.getContentResolver(),
                 Settings.Secure.getBluetoothA2dpSinkPriorityKey(device.getAddress()),
                 BluetoothA2dp.PRIORITY_OFF);
     }

     public synchronized int setSinkPriority(BluetoothDevice device, int priority) {
         mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                                 "Need BLUETOOTH_ADMIN permission");
         if (!BluetoothDevice.checkBluetoothAddress(device.getAddress())) {
             return BluetoothError.ERROR;
         }
         return Settings.Secure.putInt(mContext.getContentResolver(),
                 Settings.Secure.getBluetoothA2dpSinkPriorityKey(device.getAddress()), priority) ?
                 BluetoothError.SUCCESS : BluetoothError.ERROR;
     }

     private synchronized void onSinkPropertyChanged(String path, String []propValues) {
         if (!mBluetoothService.isEnabled()) {
             return;
         }

         String name = propValues[0];
         String address = mBluetoothService.getAddressFromObjectPath(path);
         if (address == null) {
             Log.e(TAG, "onSinkPropertyChanged: Address of the remote device in null");
             return;
         }

         BluetoothDevice device = mAdapter.getRemoteDevice(address);

         if (name.equals(PROPERTY_STATE)) {
             int state = convertBluezSinkStringtoState(propValues[1]);
             if (mAudioDevices.get(device) == null) {
                 // This is for an incoming connection for a device not known to us.
                 // We have authorized it and bluez state has changed.
                 addAudioSink(device);
             } else {
                 int prevState = mAudioDevices.get(device);
                 handleSinkStateChange(device, prevState, state);
             }
         }
     }

     private void handleSinkStateChange(BluetoothDevice device, int prevState, int state) {
         if (state != prevState) {
             if (state == BluetoothA2dp.STATE_DISCONNECTED ||
                     state == BluetoothA2dp.STATE_DISCONNECTING) {
                 if (prevState == BluetoothA2dp.STATE_CONNECTED ||
                         prevState == BluetoothA2dp.STATE_PLAYING) {
                    // disconnecting or disconnected
                    Intent intent = new Intent(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
                    mContext.sendBroadcast(intent);
                 }
                 mSinkCount--;
             } else if (state == BluetoothA2dp.STATE_CONNECTED) {
                 mSinkCount ++;
             }
             mAudioDevices.put(device, state);

             Intent intent = new Intent(BluetoothA2dp.SINK_STATE_CHANGED_ACTION);
             intent.putExtra(BluetoothIntent.DEVICE, device);
             intent.putExtra(BluetoothA2dp.SINK_PREVIOUS_STATE, prevState);
             intent.putExtra(BluetoothA2dp.SINK_STATE, state);
             mContext.sendBroadcast(intent, BLUETOOTH_PERM);

             if (DBG) log("A2DP state : device: " + device + " State:" + prevState + "->" + state);
         }
     }

     private synchronized Set<BluetoothDevice> lookupSinksMatchingStates(int[] states) {
         Set<BluetoothDevice> sinks = new HashSet<BluetoothDevice>();
         if (mAudioDevices.isEmpty()) {
             return sinks;
         }
         for (BluetoothDevice device: mAudioDevices.keySet()) {
             int sinkState = getSinkState(device);
             for (int state : states) {
                 if (state == sinkState) {
                     sinks.add(device);
                     break;
                 }
             }
         }
         return sinks;
     }

     @Override
     protected synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
         if (mAudioDevices.isEmpty()) return;
         pw.println("Cached audio devices:");
         for (BluetoothDevice device : mAudioDevices.keySet()) {
             int state = mAudioDevices.get(device);
             pw.println(device + " " + BluetoothA2dp.stateToString(state));
         }
     }

     private static void log(String msg) {
         Log.d(TAG, msg);
     }

     private native boolean initNative();
     private native void cleanupNative();
     private synchronized native boolean connectSinkNative(String path);
     private synchronized native boolean disconnectSinkNative(String path);
     private synchronized native Object []getSinkPropertiesNative(String path);
 }
	/*
	* Copyright (C) 2008 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.
	*/

	/**
	* TODO: Move this to services.jar
	* and make the contructor package private again.
	* @hide
	*/

	package android.server;

	import android.bluetooth.BluetoothA2dp;
	import android.bluetooth.BluetoothAdapter;
	import android.bluetooth.BluetoothDevice;
	import android.bluetooth.BluetoothError;
	import android.bluetooth.BluetoothIntent;
	import android.bluetooth.BluetoothUuid;
	import android.bluetooth.IBluetoothA2dp;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.media.AudioManager;
	import android.os.Handler;
	import android.os.Message;
	import android.provider.Settings;
	import android.util.Log;

	import java.io.FileDescriptor;
	import java.io.PrintWriter;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.Set;
	import java.util.UUID;

	public class BluetoothA2dpService extends IBluetoothA2dp.Stub {
	private static final String TAG = "BluetoothA2dpService";
	private static final boolean DBG = true;

	public static final String BLUETOOTH_A2DP_SERVICE = "bluetooth_a2dp";

	private static final String BLUETOOTH_ADMIN_PERM = android.Manifest.permission.BLUETOOTH_ADMIN;
	private static final String BLUETOOTH_PERM = android.Manifest.permission.BLUETOOTH;

	private static final String BLUETOOTH_ENABLED = "bluetooth_enabled";

	private static final int MESSAGE_CONNECT_TO = 1;

	private static final String PROPERTY_STATE = "State";

	private static final String SINK_STATE_DISCONNECTED = "disconnected";
	private static final String SINK_STATE_CONNECTING = "connecting";
	private static final String SINK_STATE_CONNECTED = "connected";
	private static final String SINK_STATE_PLAYING = "playing";

	private static int mSinkCount;

	private final Context mContext;
	private final IntentFilter mIntentFilter;
	private HashMap<BluetoothDevice, Integer> mAudioDevices;
	private final AudioManager mAudioManager;
	private final BluetoothService mBluetoothService;
	private final BluetoothAdapter mAdapter;

	private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	BluetoothDevice device =
	intent.getParcelableExtra(BluetoothIntent.DEVICE);
	if (action.equals(BluetoothIntent.BLUETOOTH_STATE_CHANGED_ACTION)) {
	int state = intent.getIntExtra(BluetoothIntent.BLUETOOTH_STATE,
	BluetoothError.ERROR);
	switch (state) {
	case BluetoothAdapter.BLUETOOTH_STATE_ON:
	onBluetoothEnable();
	break;
	case BluetoothAdapter.BLUETOOTH_STATE_TURNING_OFF:
	onBluetoothDisable();
	break;
	}
	} else if (action.equals(BluetoothIntent.BOND_STATE_CHANGED_ACTION)) {
	int bondState = intent.getIntExtra(BluetoothIntent.BOND_STATE,
	BluetoothError.ERROR);
	switch(bondState) {
	case BluetoothDevice.BOND_BONDED:
	setSinkPriority(device, BluetoothA2dp.PRIORITY_AUTO);
	break;
	case BluetoothDevice.BOND_BONDING:
	case BluetoothDevice.BOND_NOT_BONDED:
	setSinkPriority(device, BluetoothA2dp.PRIORITY_OFF);
	break;
	}
	} else if (action.equals(BluetoothIntent.REMOTE_DEVICE_CONNECTED_ACTION)) {
	if (getSinkPriority(device) > BluetoothA2dp.PRIORITY_OFF &&
	isSinkDevice(device)) {
	// This device is a preferred sink. Make an A2DP connection
	// after a delay. We delay to avoid connection collisions,
	// and to give other profiles such as HFP a chance to
	// connect first.
	Message msg = Message.obtain(mHandler, MESSAGE_CONNECT_TO, device);
	mHandler.sendMessageDelayed(msg, 6000);
	}
	}
	}
	};

	public BluetoothA2dpService(Context context, BluetoothService bluetoothService) {
	mContext = context;

	mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);

	mBluetoothService = bluetoothService;
	if (mBluetoothService == null) {
	throw new RuntimeException("Platform does not support Bluetooth");
	}

	if (!initNative()) {
	throw new RuntimeException("Could not init BluetoothA2dpService");
	}

	mAdapter = (BluetoothAdapter) context.getSystemService(Context.BLUETOOTH_SERVICE);

	mIntentFilter = new IntentFilter(BluetoothIntent.BLUETOOTH_STATE_CHANGED_ACTION);
	mIntentFilter.addAction(BluetoothIntent.BOND_STATE_CHANGED_ACTION);
	mIntentFilter.addAction(BluetoothIntent.REMOTE_DEVICE_CONNECTED_ACTION);
	mContext.registerReceiver(mReceiver, mIntentFilter);

	mAudioDevices = new HashMap<BluetoothDevice, Integer>();

	if (mBluetoothService.isEnabled())
	onBluetoothEnable();
	}

	@Override
	protected void finalize() throws Throwable {
	try {
	cleanupNative();
	} finally {
	super.finalize();
	}
	}

	private final Handler mHandler = new Handler() {
	@Override
	public void handleMessage(Message msg) {
	switch (msg.what) {
	case MESSAGE_CONNECT_TO:
	BluetoothDevice device = (BluetoothDevice) msg.obj;
	// check bluetooth is still on, device is still preferred, and
	// nothing is currently connected
	if (mBluetoothService.isEnabled() &&
	getSinkPriority(device) > BluetoothA2dp.PRIORITY_OFF &&
	lookupSinksMatchingStates(new int[] {
	BluetoothA2dp.STATE_CONNECTING,
	BluetoothA2dp.STATE_CONNECTED,
	BluetoothA2dp.STATE_PLAYING,
	BluetoothA2dp.STATE_DISCONNECTING}).size() == 0) {
	log("Auto-connecting A2DP to sink " + device);
	connectSink(device);
	}
	break;
	}
	}
	};

	private int convertBluezSinkStringtoState(String value) {
	if (value.equalsIgnoreCase("disconnected"))
	return BluetoothA2dp.STATE_DISCONNECTED;
	if (value.equalsIgnoreCase("connecting"))
	return BluetoothA2dp.STATE_CONNECTING;
	if (value.equalsIgnoreCase("connected"))
	return BluetoothA2dp.STATE_CONNECTED;
	if (value.equalsIgnoreCase("playing"))
	return BluetoothA2dp.STATE_PLAYING;
	return -1;
	}

	private boolean isSinkDevice(BluetoothDevice device) {
	String uuids[] = mBluetoothService.getRemoteUuids(device.getAddress());
	UUID uuid;
	if (uuids != null) {
	for (String deviceUuid: uuids) {
	uuid = UUID.fromString(deviceUuid);
	if (BluetoothUuid.isAudioSink(uuid)) {
	return true;
	}
	}
	}
	return false;
	}

	private synchronized boolean addAudioSink (BluetoothDevice device) {
	String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
	String propValues[] = (String []) getSinkPropertiesNative(path);
	if (propValues == null) {
	Log.e(TAG, "Error while getting AudioSink properties for device: " + device);
	return false;
	}
	Integer state = null;
	// Properties are name-value pairs
	for (int i = 0; i < propValues.length; i+=2) {
	if (propValues[i].equals(PROPERTY_STATE)) {
	state = new Integer(convertBluezSinkStringtoState(propValues[i+1]));
	break;
	}
	}
	mAudioDevices.put(device, state);
	handleSinkStateChange(device, BluetoothA2dp.STATE_DISCONNECTED, state);
	return true;
	}

	private synchronized void onBluetoothEnable() {
	String devices = mBluetoothService.getProperty("Devices");
	mSinkCount = 0;
	if (devices != null) {
	String [] paths = devices.split(",");
	for (String path: paths) {
	String address = mBluetoothService.getAddressFromObjectPath(path);
	BluetoothDevice device = mAdapter.getRemoteDevice(address);
	String []uuids = mBluetoothService.getRemoteUuids(address);
	if (uuids != null)
	for (String uuid: uuids) {
	UUID remoteUuid = UUID.fromString(uuid);
	if (BluetoothUuid.isAudioSink(remoteUuid) \|\|
	BluetoothUuid.isAudioSource(remoteUuid) \|\|
	BluetoothUuid.isAdvAudioDist(remoteUuid)) {
	addAudioSink(device);
	break;
	}
	}
	}
	}
	mAudioManager.setParameters(BLUETOOTH_ENABLED+"=true");
	}

	private synchronized void onBluetoothDisable() {
	if (!mAudioDevices.isEmpty()) {
	BluetoothDevice[] devices = new BluetoothDevice[mAudioDevices.size()];
	devices = mAudioDevices.keySet().toArray(devices);
	for (BluetoothDevice device : devices) {
	int state = getSinkState(device);
	switch (state) {
	case BluetoothA2dp.STATE_CONNECTING:
	case BluetoothA2dp.STATE_CONNECTED:
	case BluetoothA2dp.STATE_PLAYING:
	disconnectSinkNative(mBluetoothService.getObjectPathFromAddress(
	device.getAddress()));
	handleSinkStateChange(device, state, BluetoothA2dp.STATE_DISCONNECTED);
	break;
	case BluetoothA2dp.STATE_DISCONNECTING:
	handleSinkStateChange(device, BluetoothA2dp.STATE_DISCONNECTING,
	BluetoothA2dp.STATE_DISCONNECTED);
	break;
	}
	}
	mAudioDevices.clear();
	}

	mAudioManager.setParameters(BLUETOOTH_ENABLED + "=false");
	}

	public synchronized int connectSink(BluetoothDevice device) {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH_ADMIN permission");
	if (DBG) log("connectSink(" + device + ")");

	// ignore if there are any active sinks
	if (lookupSinksMatchingStates(new int[] {
	BluetoothA2dp.STATE_CONNECTING,
	BluetoothA2dp.STATE_CONNECTED,
	BluetoothA2dp.STATE_PLAYING,
	BluetoothA2dp.STATE_DISCONNECTING}).size() != 0) {
	return BluetoothError.ERROR;
	}

	if (mAudioDevices.get(device) == null && !addAudioSink(device))
	return BluetoothError.ERROR;

	int state = mAudioDevices.get(device);

	switch (state) {
	case BluetoothA2dp.STATE_CONNECTED:
	case BluetoothA2dp.STATE_PLAYING:
	case BluetoothA2dp.STATE_DISCONNECTING:
	return BluetoothError.ERROR;
	case BluetoothA2dp.STATE_CONNECTING:
	return BluetoothError.SUCCESS;
	}

	String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
	if (path == null)
	return BluetoothError.ERROR;

	// State is DISCONNECTED
	if (!connectSinkNative(path)) {
	return BluetoothError.ERROR;
	}
	return BluetoothError.SUCCESS;
	}

	public synchronized int disconnectSink(BluetoothDevice device) {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH_ADMIN permission");
	if (DBG) log("disconnectSink(" + device + ")");

	String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
	if (path == null) {
	return BluetoothError.ERROR;
	}

	switch (getSinkState(device)) {
	case BluetoothA2dp.STATE_DISCONNECTED:
	return BluetoothError.ERROR;
	case BluetoothA2dp.STATE_DISCONNECTING:
	return BluetoothError.SUCCESS;
	}

	// State is CONNECTING or CONNECTED or PLAYING
	if (!disconnectSinkNative(path)) {
	return BluetoothError.ERROR;
	} else {
	return BluetoothError.SUCCESS;
	}
	}

	public synchronized BluetoothDevice[] getConnectedSinks() {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	Set<BluetoothDevice> sinks = lookupSinksMatchingStates(
	new int[] {BluetoothA2dp.STATE_CONNECTED, BluetoothA2dp.STATE_PLAYING});
	return sinks.toArray(new BluetoothDevice[sinks.size()]);
	}

	public synchronized int getSinkState(BluetoothDevice device) {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	Integer state = mAudioDevices.get(device);
	if (state == null)
	return BluetoothA2dp.STATE_DISCONNECTED;
	return state;
	}

	public synchronized int getSinkPriority(BluetoothDevice device) {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return Settings.Secure.getInt(mContext.getContentResolver(),
	Settings.Secure.getBluetoothA2dpSinkPriorityKey(device.getAddress()),
	BluetoothA2dp.PRIORITY_OFF);
	}

	public synchronized int setSinkPriority(BluetoothDevice device, int priority) {
	mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH_ADMIN permission");
	if (!BluetoothDevice.checkBluetoothAddress(device.getAddress())) {
	return BluetoothError.ERROR;
	}
	return Settings.Secure.putInt(mContext.getContentResolver(),
	Settings.Secure.getBluetoothA2dpSinkPriorityKey(device.getAddress()), priority) ?
	BluetoothError.SUCCESS : BluetoothError.ERROR;
	}

	private synchronized void onSinkPropertyChanged(String path, String []propValues) {
	if (!mBluetoothService.isEnabled()) {
	return;
	}

	String name = propValues[0];
	String address = mBluetoothService.getAddressFromObjectPath(path);
	if (address == null) {
	Log.e(TAG, "onSinkPropertyChanged: Address of the remote device in null");
	return;
	}

	BluetoothDevice device = mAdapter.getRemoteDevice(address);

	if (name.equals(PROPERTY_STATE)) {
	int state = convertBluezSinkStringtoState(propValues[1]);
	if (mAudioDevices.get(device) == null) {
	// This is for an incoming connection for a device not known to us.
	// We have authorized it and bluez state has changed.
	addAudioSink(device);
	} else {
	int prevState = mAudioDevices.get(device);
	handleSinkStateChange(device, prevState, state);
	}
	}
	}

	private void handleSinkStateChange(BluetoothDevice device, int prevState, int state) {
	if (state != prevState) {
	if (state == BluetoothA2dp.STATE_DISCONNECTED \|\|
	state == BluetoothA2dp.STATE_DISCONNECTING) {
	if (prevState == BluetoothA2dp.STATE_CONNECTED \|\|
	prevState == BluetoothA2dp.STATE_PLAYING) {
	// disconnecting or disconnected
	Intent intent = new Intent(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
	mContext.sendBroadcast(intent);
	}
	mSinkCount--;
	} else if (state == BluetoothA2dp.STATE_CONNECTED) {
	mSinkCount ++;
	}
	mAudioDevices.put(device, state);

	Intent intent = new Intent(BluetoothA2dp.SINK_STATE_CHANGED_ACTION);
	intent.putExtra(BluetoothIntent.DEVICE, device);
	intent.putExtra(BluetoothA2dp.SINK_PREVIOUS_STATE, prevState);
	intent.putExtra(BluetoothA2dp.SINK_STATE, state);
	mContext.sendBroadcast(intent, BLUETOOTH_PERM);

	if (DBG) log("A2DP state : device: " + device + " State:" + prevState + "->" + state);
	}
	}

	private synchronized Set<BluetoothDevice> lookupSinksMatchingStates(int[] states) {
	Set<BluetoothDevice> sinks = new HashSet<BluetoothDevice>();
	if (mAudioDevices.isEmpty()) {
	return sinks;
	}
	for (BluetoothDevice device: mAudioDevices.keySet()) {
	int sinkState = getSinkState(device);
	for (int state : states) {
	if (state == sinkState) {
	sinks.add(device);
	break;
	}
	}
	}
	return sinks;
	}

	@Override
	protected synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
	if (mAudioDevices.isEmpty()) return;
	pw.println("Cached audio devices:");
	for (BluetoothDevice device : mAudioDevices.keySet()) {
	int state = mAudioDevices.get(device);
	pw.println(device + " " + BluetoothA2dp.stateToString(state));
	}
	}

	private static void log(String msg) {
	Log.d(TAG, msg);
	}

	private native boolean initNative();
	private native void cleanupNative();
	private synchronized native boolean connectSinkNative(String path);
	private synchronized native boolean disconnectSinkNative(String path);
	private synchronized native Object []getSinkPropertiesNative(String path);
	}