/*
* 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.BluetoothUuid;
import android.bluetooth.IBluetoothA2dp;
import android.os.ParcelUuid;
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;
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 int mTargetA2dpState;
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
BluetoothDevice device =
intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED)) {
int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE,
BluetoothAdapter.ERROR);
switch (state) {
case BluetoothAdapter.STATE_ON:
onBluetoothEnable();
break;
case BluetoothAdapter.STATE_TURNING_OFF:
onBluetoothDisable();
break;
}
} else if (action.equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
BluetoothDevice.ERROR);
switch(bondState) {
case BluetoothDevice.BOND_BONDED:
if (getSinkPriority(device) == BluetoothA2dp.PRIORITY_UNDEFINED) {
setSinkPriority(device, BluetoothA2dp.PRIORITY_ON);
}
break;
case BluetoothDevice.BOND_NONE:
setSinkPriority(device, BluetoothA2dp.PRIORITY_UNDEFINED);
break;
}
} else if (action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)) {
if (getSinkPriority(device) == BluetoothA2dp.PRIORITY_AUTO_CONNECT &&
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);
}
} else if (action.equals(BluetoothDevice.ACTION_ACL_DISCONNECTED)) {
synchronized (this) {
if (mAudioDevices.containsKey(device)) {
int state = mAudioDevices.get(device);
handleSinkStateChange(device, state, BluetoothA2dp.STATE_DISCONNECTED);
}
}
} else if (action.equals(AudioManager.VOLUME_CHANGED_ACTION)) {
int streamType = intent.getIntExtra(AudioManager.EXTRA_VOLUME_STREAM_TYPE, -1);
if (streamType == AudioManager.STREAM_MUSIC) {
BluetoothDevice sinks[] = getConnectedSinks();
if (sinks.length != 0 && isPhoneDocked(sinks[0])) {
String address = sinks[0].getAddress();
int newVolLevel =
intent.getIntExtra(AudioManager.EXTRA_VOLUME_STREAM_VALUE, 0);
int oldVolLevel =
intent.getIntExtra(AudioManager.EXTRA_PREV_VOLUME_STREAM_VALUE, 0);
String path = mBluetoothService.getObjectPathFromAddress(address);
if (newVolLevel > oldVolLevel) {
avrcpVolumeUpNative(path);
} else if (newVolLevel < oldVolLevel) {
avrcpVolumeDownNative(path);
}
}
}
}
}
};
private boolean isPhoneDocked(BluetoothDevice device) {
// This works only because these broadcast intents are "sticky"
Intent i = mContext.registerReceiver(null, new IntentFilter(Intent.ACTION_DOCK_EVENT));
if (i != null) {
int state = i.getIntExtra(Intent.EXTRA_DOCK_STATE, Intent.EXTRA_DOCK_STATE_UNDOCKED);
if (state != Intent.EXTRA_DOCK_STATE_UNDOCKED) {
BluetoothDevice dockDevice = i.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (dockDevice != null && device.equals(dockDevice)) {
return true;
}
}
}
return false;
}
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.getDefaultAdapter();
mIntentFilter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
mIntentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
mIntentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
mIntentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
mIntentFilter.addAction(AudioManager.VOLUME_CHANGED_ACTION);
mContext.registerReceiver(mReceiver, mIntentFilter);
mAudioDevices = new HashMap<BluetoothDevice, Integer>();
if (mBluetoothService.isEnabled())
onBluetoothEnable();
mTargetA2dpState = -1;
}
@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_AUTO_CONNECT &&
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) {
ParcelUuid[] uuids = mBluetoothService.getRemoteUuids(device.getAddress());
if (uuids != null && BluetoothUuid.isUuidPresent(uuids, BluetoothUuid.AudioSink)) {
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);
ParcelUuid[] remoteUuids = mBluetoothService.getRemoteUuids(address);
if (remoteUuids != null)
if (BluetoothUuid.containsAnyUuid(remoteUuids,
new ParcelUuid[] {BluetoothUuid.AudioSink,
BluetoothUuid.AdvAudioDist})) {
addAudioSink(device);
}
}
}
mAudioManager.setParameters(BLUETOOTH_ENABLED+"=true");
mAudioManager.setParameters("A2dpSuspended=false");
}
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 boolean connectSink(BluetoothDevice device) {
mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
"Need BLUETOOTH_ADMIN permission");
if (DBG) log("connectSink(" + device + ")");
if (!mBluetoothService.isEnabled()) return false;
// 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 false;
}
if (mAudioDevices.get(device) == null && !addAudioSink(device))
return false;
int state = mAudioDevices.get(device);
switch (state) {
case BluetoothA2dp.STATE_CONNECTED:
case BluetoothA2dp.STATE_PLAYING:
case BluetoothA2dp.STATE_DISCONNECTING:
return false;
case BluetoothA2dp.STATE_CONNECTING:
return true;
}
String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
if (path == null)
return false;
// State is DISCONNECTED
handleSinkStateChange(device, state, BluetoothA2dp.STATE_CONNECTING);
if (!connectSinkNative(path)) {
// Restore previous state
handleSinkStateChange(device, mAudioDevices.get(device), state);
return false;
}
return true;
}
public synchronized boolean 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 false;
}
int state = getSinkState(device);
switch (state) {
case BluetoothA2dp.STATE_DISCONNECTED:
return false;
case BluetoothA2dp.STATE_DISCONNECTING:
return true;
}
// State is CONNECTING or CONNECTED or PLAYING
handleSinkStateChange(device, state, BluetoothA2dp.STATE_DISCONNECTING);
if (!disconnectSinkNative(path)) {
// Restore previous state
handleSinkStateChange(device, mAudioDevices.get(device), state);
return false;
}
return true;
}
public synchronized boolean suspendSink(BluetoothDevice device) {
mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
"Need BLUETOOTH_ADMIN permission");
if (DBG) log("suspendSink(" + device + "), mTargetA2dpState: "+mTargetA2dpState);
if (device == null || mAudioDevices == null) {
return false;
}
String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
Integer state = mAudioDevices.get(device);
if (path == null || state == null) {
return false;
}
mTargetA2dpState = BluetoothA2dp.STATE_CONNECTED;
return checkSinkSuspendState(state.intValue());
}
public synchronized boolean resumeSink(BluetoothDevice device) {
mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
"Need BLUETOOTH_ADMIN permission");
if (DBG) log("resumeSink(" + device + "), mTargetA2dpState: "+mTargetA2dpState);
if (device == null || mAudioDevices == null) {
return false;
}
String path = mBluetoothService.getObjectPathFromAddress(device.getAddress());
Integer state = mAudioDevices.get(device);
if (path == null || state == null) {
return false;
}
mTargetA2dpState = BluetoothA2dp.STATE_PLAYING;
return checkSinkSuspendState(state.intValue());
}
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 BluetoothDevice[] getNonDisconnectedSinks() {
mContext.enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
Set<BluetoothDevice> sinks = lookupSinksMatchingStates(
new int[] {BluetoothA2dp.STATE_CONNECTED,
BluetoothA2dp.STATE_PLAYING,
BluetoothA2dp.STATE_CONNECTING,
BluetoothA2dp.STATE_DISCONNECTING});
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_UNDEFINED);
}
public synchronized boolean setSinkPriority(BluetoothDevice device, int priority) {
mContext.enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM,
"Need BLUETOOTH_ADMIN permission");
if (!BluetoothAdapter.checkBluetoothAddress(device.getAddress())) {
return false;
}
return Settings.Secure.putInt(mContext.getContentResolver(),
Settings.Secure.getBluetoothA2dpSinkPriorityKey(device.getAddress()), priority);
}
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) {
mSinkCount--;
} else if (state == BluetoothA2dp.STATE_CONNECTED) {
mSinkCount ++;
}
mAudioDevices.put(device, state);
checkSinkSuspendState(state);
mTargetA2dpState = -1;
if (getSinkPriority(device) > BluetoothA2dp.PRIORITY_OFF &&
state == BluetoothA2dp.STATE_CONNECTING ||
state == BluetoothA2dp.STATE_CONNECTED) {
// We have connected or attempting to connect.
// Bump priority
setSinkPriority(device, BluetoothA2dp.PRIORITY_AUTO_CONNECT);
}
Intent intent = new Intent(BluetoothA2dp.ACTION_SINK_STATE_CHANGED);
intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device);
intent.putExtra(BluetoothA2dp.EXTRA_PREVIOUS_SINK_STATE, prevState);
intent.putExtra(BluetoothA2dp.EXTRA_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;
}
private boolean checkSinkSuspendState(int state) {
boolean result = true;
if (state != mTargetA2dpState) {
if (state == BluetoothA2dp.STATE_PLAYING &&
mTargetA2dpState == BluetoothA2dp.STATE_CONNECTED) {
mAudioManager.setParameters("A2dpSuspended=true");
} else if (state == BluetoothA2dp.STATE_CONNECTED &&
mTargetA2dpState == BluetoothA2dp.STATE_PLAYING) {
mAudioManager.setParameters("A2dpSuspended=false");
} else {
result = false;
}
}
return result;
}
private void onConnectSinkResult(String deviceObjectPath, boolean result) {
// If the call was a success, ignore we will update the state
// when we a Sink Property Change
if (!result) {
if (deviceObjectPath != null) {
String address = mBluetoothService.getAddressFromObjectPath(deviceObjectPath);
BluetoothDevice device = mAdapter.getRemoteDevice(address);
int state = getSinkState(device);
handleSinkStateChange(device, state, BluetoothA2dp.STATE_DISCONNECTED);
}
}
}
@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 boolean suspendSinkNative(String path);
private synchronized native boolean resumeSinkNative(String path);
private synchronized native Object []getSinkPropertiesNative(String path);
private synchronized native boolean avrcpVolumeUpNative(String path);
private synchronized native boolean avrcpVolumeDownNative(String path);
}