src/com/android/bluetooth/hfp/HeadsetService.java - platform/packages/apps/Bluetooth - Git at Google

 /*
  * Copyright (C) 2012 Google Inc.
  */

 package com.android.bluetooth.hfp;

 import android.bluetooth.BluetoothDevice;
 import android.bluetooth.BluetoothHeadset;
 import android.bluetooth.BluetoothProfile;
 import android.bluetooth.IBluetoothHeadset;
 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.util.ArrayList;
 import java.util.List;
 import java.util.Iterator;
 import java.util.Map;
 import android.content.pm.PackageManager;
 import com.android.bluetooth.btservice.ProfileService;

 /**
  * Provides Bluetooth Headset and Handsfree profile, as a service in
  * the Bluetooth application.
  * @hide
  */
 public class HeadsetService extends ProfileService {
     private static final boolean DBG = true;
     private static final String TAG = "HeadsetService";
     private HeadsetStateMachine mStateMachine;
     private static HeadsetService sHeadsetService;

     protected String getName() {
         return TAG;
     }

     public IProfileServiceBinder initBinder() {
         return new BluetoothHeadsetBinder(this);
     }

     protected boolean start() {
         mStateMachine = new HeadsetStateMachine(this);
         mStateMachine.start();
         IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
         filter.addAction(AudioManager.VOLUME_CHANGED_ACTION);
         filter.addAction(BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY);
         try {
             registerReceiver(mHeadsetReceiver, filter);
         } catch (Exception e) {
             Log.w(TAG,"Unable to register headset receiver",e);
         }
         setHeadsetService(this);
         return true;
     }

     protected boolean stop() {
         try {
             unregisterReceiver(mHeadsetReceiver);
         } catch (Exception e) {
             Log.w(TAG,"Unable to unregister headset receiver",e);
         }
         // TODO(BT) mStateMachine.quit();
         return true;
     }

     protected boolean cleanup() {
         if (mStateMachine != null) {
             mStateMachine.cleanup();
             mStateMachine=null;
         }
         clearHeadsetService();
         return true;
     }

     private final BroadcastReceiver mHeadsetReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             String action = intent.getAction();
             if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
                 mStateMachine.sendMessage(HeadsetStateMachine.INTENT_BATTERY_CHANGED, intent);
             } else if (action.equals(AudioManager.VOLUME_CHANGED_ACTION)) {
                 int streamType = intent.getIntExtra(AudioManager.EXTRA_VOLUME_STREAM_TYPE, -1);
                 if (streamType == AudioManager.STREAM_BLUETOOTH_SCO) {
                     mStateMachine.sendMessage(HeadsetStateMachine.INTENT_SCO_VOLUME_CHANGED,
                                               intent);
                 }
             }
             else if (action.equals(BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY)) {
                 Log.v(TAG, "HeadsetService -  Received BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY");
                 mStateMachine.handleAccessPermissionResult(intent);
             }
         }
     };

     /**
      * Handlers for incoming service calls
      */
     private static class BluetoothHeadsetBinder extends IBluetoothHeadset.Stub implements IProfileServiceBinder {
         private HeadsetService mService;

         public BluetoothHeadsetBinder(HeadsetService svc) {
             mService = svc;
         }
         public boolean cleanup() {
             mService = null;
             return true;
         }

         private HeadsetService getService() {
             if (mService  != null && mService.isAvailable()) {
                 return mService;
             }
             return null;
         }

         public boolean connect(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.connect(device);
         }

         public boolean disconnect(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.disconnect(device);
         }

         public List<BluetoothDevice> getConnectedDevices() {
             HeadsetService service = getService();
             if (service == null) return new ArrayList<BluetoothDevice>(0);
             return service.getConnectedDevices();
         }

         public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
             HeadsetService service = getService();
             if (service == null) return new ArrayList<BluetoothDevice>(0);
             return service.getDevicesMatchingConnectionStates(states);
         }

         public int getConnectionState(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return BluetoothProfile.STATE_DISCONNECTED;
             return service.getConnectionState(device);
         }

         public boolean setPriority(BluetoothDevice device, int priority) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.setPriority(device, priority);
         }

         public int getPriority(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return BluetoothProfile.PRIORITY_UNDEFINED;
             return service.getPriority(device);
         }

         public boolean startVoiceRecognition(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.startVoiceRecognition(device);
         }

         public boolean stopVoiceRecognition(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.stopVoiceRecognition(device);
         }

         public boolean isAudioOn() {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.isAudioOn();
         }

         public boolean isAudioConnected(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.isAudioConnected(device);
         }

         public int getBatteryUsageHint(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return 0;
             return service.getBatteryUsageHint(device);
         }

         public boolean acceptIncomingConnect(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.acceptIncomingConnect(device);
         }

         public boolean rejectIncomingConnect(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.rejectIncomingConnect(device);
         }

         public int getAudioState(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return BluetoothHeadset.STATE_AUDIO_DISCONNECTED;
             return service.getAudioState(device);
         }

         public boolean connectAudio() {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.connectAudio();
         }

         public boolean disconnectAudio() {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.disconnectAudio();
         }

         public boolean startScoUsingVirtualVoiceCall(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.startScoUsingVirtualVoiceCall(device);
         }

         public boolean stopScoUsingVirtualVoiceCall(BluetoothDevice device) {
             HeadsetService service = getService();
             if (service == null) return false;
             return service.stopScoUsingVirtualVoiceCall(device);
         }

         public void phoneStateChanged(int numActive, int numHeld, int callState,
                                       String number, int type) {
             HeadsetService service = getService();
             if (service == null) return;
             service.phoneStateChanged(numActive, numHeld, callState, number, type);
         }

         public void roamChanged(boolean roam) {
             HeadsetService service = getService();
             if (service == null) return;
             service.roamChanged(roam);
         }

         public void clccResponse(int index, int direction, int status, int mode, boolean mpty,
                                  String number, int type) {
             HeadsetService service = getService();
             if (service == null) return;
             service.clccResponse(index, direction, status, mode, mpty, number, type);
         }
     };

     //API methods
     public static synchronized HeadsetService getHeadsetService(){
         if (sHeadsetService != null && sHeadsetService.isAvailable()) {
             if (DBG) Log.d(TAG, "getHeadsetService(): returning " + sHeadsetService);
             return sHeadsetService;
         }
         if (DBG)  {
             if (sHeadsetService == null) {
                 Log.d(TAG, "getHeadsetService(): service is NULL");
             } else if (!(sHeadsetService.isAvailable())) {
                 Log.d(TAG,"getHeadsetService(): service is not available");
             }
         }
         return null;
     }

     private static synchronized void setHeadsetService(HeadsetService instance) {
         if (instance != null && instance.isAvailable()) {
             if (DBG) Log.d(TAG, "setHeadsetService(): set to: " + sHeadsetService);
             sHeadsetService = instance;
         } else {
             if (DBG)  {
                 if (sHeadsetService == null) {
                     Log.d(TAG, "setHeadsetService(): service not available");
                 } else if (!sHeadsetService.isAvailable()) {
                     Log.d(TAG,"setHeadsetService(): service is cleaning up");
                 }
             }
         }
     }

     private static synchronized void clearHeadsetService() {
         sHeadsetService = null;
     }

     public boolean connect(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                        "Need BLUETOOTH ADMIN permission");

         if (getPriority(device) == BluetoothProfile.PRIORITY_OFF) {
             return false;
         }

         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState == BluetoothProfile.STATE_CONNECTED ||
             connectionState == BluetoothProfile.STATE_CONNECTING) {
             return false;
         }

         mStateMachine.sendMessage(HeadsetStateMachine.CONNECT, device);
         return true;
     }

     boolean disconnect(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                        "Need BLUETOOTH ADMIN permission");
         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState != BluetoothProfile.STATE_CONNECTED &&
             connectionState != BluetoothProfile.STATE_CONNECTING) {
             return false;
         }

         mStateMachine.sendMessage(HeadsetStateMachine.DISCONNECT, device);
         return true;
     }

     public List<BluetoothDevice> getConnectedDevices() {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return mStateMachine.getConnectedDevices();
     }

     private List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return mStateMachine.getDevicesMatchingConnectionStates(states);
     }

     int getConnectionState(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return mStateMachine.getConnectionState(device);
     }

     public boolean setPriority(BluetoothDevice device, int priority) {
         enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                        "Need BLUETOOTH_ADMIN permission");
         Settings.Secure.putInt(getContentResolver(),
             Settings.Secure.getBluetoothHeadsetPriorityKey(device.getAddress()),
             priority);
         if (DBG) Log.d(TAG, "Saved priority " + device + " = " + priority);
         return true;
     }

     public int getPriority(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
                                        "Need BLUETOOTH_ADMIN permission");
         int priority = Settings.Secure.getInt(getContentResolver(),
             Settings.Secure.getBluetoothHeadsetPriorityKey(device.getAddress()),
             BluetoothProfile.PRIORITY_UNDEFINED);
         return priority;
     }

     boolean startVoiceRecognition(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState != BluetoothProfile.STATE_CONNECTED &&
             connectionState != BluetoothProfile.STATE_CONNECTING) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.VOICE_RECOGNITION_START);
         return true;
     }

     boolean stopVoiceRecognition(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         // It seem that we really need to check the AudioOn state.
         // But since we allow startVoiceRecognition in STATE_CONNECTED and
         // STATE_CONNECTING state, we do these 2 in this method
         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState != BluetoothProfile.STATE_CONNECTED &&
             connectionState != BluetoothProfile.STATE_CONNECTING) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.VOICE_RECOGNITION_STOP);
         // TODO is this return correct when the voice recognition is not on?
         return true;
     }

     boolean isAudioOn() {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return mStateMachine.isAudioOn();
     }

     boolean isAudioConnected(BluetoothDevice device) {
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         return mStateMachine.isAudioConnected(device);
     }

     int getBatteryUsageHint(BluetoothDevice device) {
         // TODO(BT) ask for BT stack support?
         return 0;
     }

     boolean acceptIncomingConnect(BluetoothDevice device) {
         // TODO(BT) remove it if stack does access control
         return false;
     }

     boolean rejectIncomingConnect(BluetoothDevice device) {
         // TODO(BT) remove it if stack does access control
         return false;
     }

     int getAudioState(BluetoothDevice device) {
         return mStateMachine.getAudioState(device);
     }

     boolean connectAudio() {
         // TODO(BT) BLUETOOTH or BLUETOOTH_ADMIN permission
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         if (!mStateMachine.isConnected()) {
             return false;
         }
         if (mStateMachine.isAudioOn()) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.CONNECT_AUDIO);
         return true;
     }

     boolean disconnectAudio() {
         // TODO(BT) BLUETOOTH or BLUETOOTH_ADMIN permission
         enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
         if (!mStateMachine.isAudioOn()) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.DISCONNECT_AUDIO);
         return true;
     }

     boolean startScoUsingVirtualVoiceCall(BluetoothDevice device) {
         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState != BluetoothProfile.STATE_CONNECTED &&
             connectionState != BluetoothProfile.STATE_CONNECTING) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.VIRTUAL_CALL_START, device);
         return true;
     }

     boolean stopScoUsingVirtualVoiceCall(BluetoothDevice device) {
         int connectionState = mStateMachine.getConnectionState(device);
         if (connectionState != BluetoothProfile.STATE_CONNECTED &&
             connectionState != BluetoothProfile.STATE_CONNECTING) {
             return false;
         }
         mStateMachine.sendMessage(HeadsetStateMachine.VIRTUAL_CALL_STOP, device);
         return true;
     }

     private void phoneStateChanged(int numActive, int numHeld, int callState,
                                   String number, int type) {
         Message msg = mStateMachine.obtainMessage(HeadsetStateMachine.CALL_STATE_CHANGED);
         msg.obj = new HeadsetCallState(numActive, numHeld, callState, number, type);
         msg.arg1 = 0; // false
         mStateMachine.sendMessage(msg);
     }

     private void roamChanged(boolean roam) {
         mStateMachine.sendMessage(HeadsetStateMachine.ROAM_CHANGED, roam);
     }

     private void clccResponse(int index, int direction, int status, int mode, boolean mpty,
                              String number, int type) {
         mStateMachine.sendMessage(HeadsetStateMachine.SEND_CCLC_RESPONSE,
             new HeadsetClccResponse(index, direction, status, mode, mpty, number, type));
     }

 }
	/*
	* Copyright (C) 2012 Google Inc.
	*/

	package com.android.bluetooth.hfp;

	import android.bluetooth.BluetoothDevice;
	import android.bluetooth.BluetoothHeadset;
	import android.bluetooth.BluetoothProfile;
	import android.bluetooth.IBluetoothHeadset;
	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.util.ArrayList;
	import java.util.List;
	import java.util.Iterator;
	import java.util.Map;
	import android.content.pm.PackageManager;
	import com.android.bluetooth.btservice.ProfileService;

	/**
	* Provides Bluetooth Headset and Handsfree profile, as a service in
	* the Bluetooth application.
	* @hide
	*/
	public class HeadsetService extends ProfileService {
	private static final boolean DBG = true;
	private static final String TAG = "HeadsetService";
	private HeadsetStateMachine mStateMachine;
	private static HeadsetService sHeadsetService;

	protected String getName() {
	return TAG;
	}

	public IProfileServiceBinder initBinder() {
	return new BluetoothHeadsetBinder(this);
	}

	protected boolean start() {
	mStateMachine = new HeadsetStateMachine(this);
	mStateMachine.start();
	IntentFilter filter = new IntentFilter(Intent.ACTION_BATTERY_CHANGED);
	filter.addAction(AudioManager.VOLUME_CHANGED_ACTION);
	filter.addAction(BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY);
	try {
	registerReceiver(mHeadsetReceiver, filter);
	} catch (Exception e) {
	Log.w(TAG,"Unable to register headset receiver",e);
	}
	setHeadsetService(this);
	return true;
	}

	protected boolean stop() {
	try {
	unregisterReceiver(mHeadsetReceiver);
	} catch (Exception e) {
	Log.w(TAG,"Unable to unregister headset receiver",e);
	}
	// TODO(BT) mStateMachine.quit();
	return true;
	}

	protected boolean cleanup() {
	if (mStateMachine != null) {
	mStateMachine.cleanup();
	mStateMachine=null;
	}
	clearHeadsetService();
	return true;
	}

	private final BroadcastReceiver mHeadsetReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	String action = intent.getAction();
	if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
	mStateMachine.sendMessage(HeadsetStateMachine.INTENT_BATTERY_CHANGED, intent);
	} else if (action.equals(AudioManager.VOLUME_CHANGED_ACTION)) {
	int streamType = intent.getIntExtra(AudioManager.EXTRA_VOLUME_STREAM_TYPE, -1);
	if (streamType == AudioManager.STREAM_BLUETOOTH_SCO) {
	mStateMachine.sendMessage(HeadsetStateMachine.INTENT_SCO_VOLUME_CHANGED,
	intent);
	}
	}
	else if (action.equals(BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY)) {
	Log.v(TAG, "HeadsetService - Received BluetoothDevice.ACTION_CONNECTION_ACCESS_REPLY");
	mStateMachine.handleAccessPermissionResult(intent);
	}
	}
	};

	/**
	* Handlers for incoming service calls
	*/
	private static class BluetoothHeadsetBinder extends IBluetoothHeadset.Stub implements IProfileServiceBinder {
	private HeadsetService mService;

	public BluetoothHeadsetBinder(HeadsetService svc) {
	mService = svc;
	}
	public boolean cleanup() {
	mService = null;
	return true;
	}

	private HeadsetService getService() {
	if (mService != null && mService.isAvailable()) {
	return mService;
	}
	return null;
	}

	public boolean connect(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.connect(device);
	}

	public boolean disconnect(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.disconnect(device);
	}

	public List<BluetoothDevice> getConnectedDevices() {
	HeadsetService service = getService();
	if (service == null) return new ArrayList<BluetoothDevice>(0);
	return service.getConnectedDevices();
	}

	public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
	HeadsetService service = getService();
	if (service == null) return new ArrayList<BluetoothDevice>(0);
	return service.getDevicesMatchingConnectionStates(states);
	}

	public int getConnectionState(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return BluetoothProfile.STATE_DISCONNECTED;
	return service.getConnectionState(device);
	}

	public boolean setPriority(BluetoothDevice device, int priority) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.setPriority(device, priority);
	}

	public int getPriority(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return BluetoothProfile.PRIORITY_UNDEFINED;
	return service.getPriority(device);
	}

	public boolean startVoiceRecognition(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.startVoiceRecognition(device);
	}

	public boolean stopVoiceRecognition(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.stopVoiceRecognition(device);
	}

	public boolean isAudioOn() {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.isAudioOn();
	}

	public boolean isAudioConnected(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.isAudioConnected(device);
	}

	public int getBatteryUsageHint(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return 0;
	return service.getBatteryUsageHint(device);
	}

	public boolean acceptIncomingConnect(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.acceptIncomingConnect(device);
	}

	public boolean rejectIncomingConnect(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.rejectIncomingConnect(device);
	}

	public int getAudioState(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return BluetoothHeadset.STATE_AUDIO_DISCONNECTED;
	return service.getAudioState(device);
	}

	public boolean connectAudio() {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.connectAudio();
	}

	public boolean disconnectAudio() {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.disconnectAudio();
	}

	public boolean startScoUsingVirtualVoiceCall(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.startScoUsingVirtualVoiceCall(device);
	}

	public boolean stopScoUsingVirtualVoiceCall(BluetoothDevice device) {
	HeadsetService service = getService();
	if (service == null) return false;
	return service.stopScoUsingVirtualVoiceCall(device);
	}

	public void phoneStateChanged(int numActive, int numHeld, int callState,
	String number, int type) {
	HeadsetService service = getService();
	if (service == null) return;
	service.phoneStateChanged(numActive, numHeld, callState, number, type);
	}

	public void roamChanged(boolean roam) {
	HeadsetService service = getService();
	if (service == null) return;
	service.roamChanged(roam);
	}

	public void clccResponse(int index, int direction, int status, int mode, boolean mpty,
	String number, int type) {
	HeadsetService service = getService();
	if (service == null) return;
	service.clccResponse(index, direction, status, mode, mpty, number, type);
	}
	};

	//API methods
	public static synchronized HeadsetService getHeadsetService(){
	if (sHeadsetService != null && sHeadsetService.isAvailable()) {
	if (DBG) Log.d(TAG, "getHeadsetService(): returning " + sHeadsetService);
	return sHeadsetService;
	}
	if (DBG) {
	if (sHeadsetService == null) {
	Log.d(TAG, "getHeadsetService(): service is NULL");
	} else if (!(sHeadsetService.isAvailable())) {
	Log.d(TAG,"getHeadsetService(): service is not available");
	}
	}
	return null;
	}

	private static synchronized void setHeadsetService(HeadsetService instance) {
	if (instance != null && instance.isAvailable()) {
	if (DBG) Log.d(TAG, "setHeadsetService(): set to: " + sHeadsetService);
	sHeadsetService = instance;
	} else {
	if (DBG) {
	if (sHeadsetService == null) {
	Log.d(TAG, "setHeadsetService(): service not available");
	} else if (!sHeadsetService.isAvailable()) {
	Log.d(TAG,"setHeadsetService(): service is cleaning up");
	}
	}
	}
	}

	private static synchronized void clearHeadsetService() {
	sHeadsetService = null;
	}

	public boolean connect(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH ADMIN permission");

	if (getPriority(device) == BluetoothProfile.PRIORITY_OFF) {
	return false;
	}

	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState == BluetoothProfile.STATE_CONNECTED \|\|
	connectionState == BluetoothProfile.STATE_CONNECTING) {
	return false;
	}

	mStateMachine.sendMessage(HeadsetStateMachine.CONNECT, device);
	return true;
	}

	boolean disconnect(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH ADMIN permission");
	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState != BluetoothProfile.STATE_CONNECTED &&
	connectionState != BluetoothProfile.STATE_CONNECTING) {
	return false;
	}

	mStateMachine.sendMessage(HeadsetStateMachine.DISCONNECT, device);
	return true;
	}

	public List<BluetoothDevice> getConnectedDevices() {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return mStateMachine.getConnectedDevices();
	}

	private List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return mStateMachine.getDevicesMatchingConnectionStates(states);
	}

	int getConnectionState(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return mStateMachine.getConnectionState(device);
	}

	public boolean setPriority(BluetoothDevice device, int priority) {
	enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH_ADMIN permission");
	Settings.Secure.putInt(getContentResolver(),
	Settings.Secure.getBluetoothHeadsetPriorityKey(device.getAddress()),
	priority);
	if (DBG) Log.d(TAG, "Saved priority " + device + " = " + priority);
	return true;
	}

	public int getPriority(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
	"Need BLUETOOTH_ADMIN permission");
	int priority = Settings.Secure.getInt(getContentResolver(),
	Settings.Secure.getBluetoothHeadsetPriorityKey(device.getAddress()),
	BluetoothProfile.PRIORITY_UNDEFINED);
	return priority;
	}

	boolean startVoiceRecognition(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState != BluetoothProfile.STATE_CONNECTED &&
	connectionState != BluetoothProfile.STATE_CONNECTING) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.VOICE_RECOGNITION_START);
	return true;
	}

	boolean stopVoiceRecognition(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	// It seem that we really need to check the AudioOn state.
	// But since we allow startVoiceRecognition in STATE_CONNECTED and
	// STATE_CONNECTING state, we do these 2 in this method
	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState != BluetoothProfile.STATE_CONNECTED &&
	connectionState != BluetoothProfile.STATE_CONNECTING) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.VOICE_RECOGNITION_STOP);
	// TODO is this return correct when the voice recognition is not on?
	return true;
	}

	boolean isAudioOn() {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return mStateMachine.isAudioOn();
	}

	boolean isAudioConnected(BluetoothDevice device) {
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	return mStateMachine.isAudioConnected(device);
	}

	int getBatteryUsageHint(BluetoothDevice device) {
	// TODO(BT) ask for BT stack support?
	return 0;
	}

	boolean acceptIncomingConnect(BluetoothDevice device) {
	// TODO(BT) remove it if stack does access control
	return false;
	}

	boolean rejectIncomingConnect(BluetoothDevice device) {
	// TODO(BT) remove it if stack does access control
	return false;
	}

	int getAudioState(BluetoothDevice device) {
	return mStateMachine.getAudioState(device);
	}

	boolean connectAudio() {
	// TODO(BT) BLUETOOTH or BLUETOOTH_ADMIN permission
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	if (!mStateMachine.isConnected()) {
	return false;
	}
	if (mStateMachine.isAudioOn()) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.CONNECT_AUDIO);
	return true;
	}

	boolean disconnectAudio() {
	// TODO(BT) BLUETOOTH or BLUETOOTH_ADMIN permission
	enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
	if (!mStateMachine.isAudioOn()) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.DISCONNECT_AUDIO);
	return true;
	}

	boolean startScoUsingVirtualVoiceCall(BluetoothDevice device) {
	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState != BluetoothProfile.STATE_CONNECTED &&
	connectionState != BluetoothProfile.STATE_CONNECTING) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.VIRTUAL_CALL_START, device);
	return true;
	}

	boolean stopScoUsingVirtualVoiceCall(BluetoothDevice device) {
	int connectionState = mStateMachine.getConnectionState(device);
	if (connectionState != BluetoothProfile.STATE_CONNECTED &&
	connectionState != BluetoothProfile.STATE_CONNECTING) {
	return false;
	}
	mStateMachine.sendMessage(HeadsetStateMachine.VIRTUAL_CALL_STOP, device);
	return true;
	}

	private void phoneStateChanged(int numActive, int numHeld, int callState,
	String number, int type) {
	Message msg = mStateMachine.obtainMessage(HeadsetStateMachine.CALL_STATE_CHANGED);
	msg.obj = new HeadsetCallState(numActive, numHeld, callState, number, type);
	msg.arg1 = 0; // false
	mStateMachine.sendMessage(msg);
	}

	private void roamChanged(boolean roam) {
	mStateMachine.sendMessage(HeadsetStateMachine.ROAM_CHANGED, roam);
	}

	private void clccResponse(int index, int direction, int status, int mode, boolean mpty,
	String number, int type) {
	mStateMachine.sendMessage(HeadsetStateMachine.SEND_CCLC_RESPONSE,
	new HeadsetClccResponse(index, direction, status, mode, mpty, number, type));
	}

	}