Issue 2416481: Support Voice Dialer over BT SCO. (3def1eec) · Commits · e / os / android_frameworks_base

media/java/android/media/AudioManager.java

+127 −1

Original line number	Diff line number	Diff line
		@@ -690,6 +690,132 @@ public class AudioManager {
		}
		}

		//====================================================================
		// Bluetooth SCO control
		/**
		* @hide
		* TODO unhide for SDK
		* Sticky broadcast intent action indicating that the bluetoooth SCO audio
		* connection state has changed. The intent contains on extra {@link EXTRA_SCO_AUDIO_STATE}
		* indicating the new state which is either {@link #SCO_AUDIO_STATE_DISCONNECTED}
		* or {@link #SCO_AUDIO_STATE_CONNECTED}
		*
		* @see #startBluetoothSco()
		*/
		@SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
		public static final String ACTION_SCO_AUDIO_STATE_CHANGED =
		"android.media.SCO_AUDIO_STATE_CHANGED";
		/**
		* @hide
		* TODO unhide for SDK
		* Extra for intent {@link #ACTION_SCO_AUDIO_STATE_CHANGED} containing the new
		* bluetooth SCO connection state.
		*/
		public static final String EXTRA_SCO_AUDIO_STATE =
		"android.media.extra.SCO_AUDIO_STATE";

		/**
		* @hide
		* TODO unhide for SDK
		* Value for extra {@link #EXTRA_SCO_AUDIO_STATE} indicating that the
		* SCO audio channel is not established
		*/
		public static final int SCO_AUDIO_STATE_DISCONNECTED = 0;
		/**
		* @hide
		* TODO unhide for SDK
		* Value for extra {@link #EXTRA_SCO_AUDIO_STATE} indicating that the
		* SCO audio channel is established
		*/
		public static final int SCO_AUDIO_STATE_CONNECTED = 1;
		/**
		* @hide
		* TODO unhide for SDK
		* Value for extra {@link #EXTRA_SCO_AUDIO_STATE} indicating that
		* there was an error trying to obtain the state
		*/
		public static final int SCO_AUDIO_STATE_ERROR = -1;


		/**
		* @hide
		* TODO unhide for SDK
		* Indicates if current platform supports use of SCO for off call use cases.
		* Application wanted to use bluetooth SCO audio when the phone is not in call
		* must first call thsi method to make sure that the platform supports this
		* feature.
		* @return true if bluetooth SCO can be used for audio when not in call
		* false otherwise
		* @see #startBluetoothSco()
		*/
		public boolean isBluetoothScoAvailableOffCall() {
		return mContext.getResources().getBoolean(
		com.android.internal.R.bool.config_bluetooth_sco_off_call);
		}

		/**
		* @hide
		* TODO unhide for SDK
		* Start bluetooth SCO audio connection.
		* <p>Requires Permission:
		* {@link android.Manifest.permission#MODIFY_AUDIO_SETTINGS}.
		* <p>This method can be used by applications wanting to send and received audio
		* to/from a bluetooth SCO headset while the phone is not in call.
		* <p>As the SCO connection establishment can take several seconds,
		* applications should not rely on the connection to be available when the method
		* returns but instead register to receive the intent {@link #ACTION_SCO_AUDIO_STATE_CHANGED}
		* and wait for the state to be {@link #SCO_AUDIO_STATE_CONNECTED}.
		* <p>As the connection is not guaranteed to succeed, applications must wait for this intent with
		* a timeout.
		* <p>When finished with the SCO connection or if the establishment times out,
		* the application must call {@link #stopBluetoothSco()} to clear the request and turn
		* down the bluetooth connection.
		* <p>Even if a SCO connection is established, the following restrictions apply on audio
		* output streams so that they can be routed to SCO headset:
		* - the stream type must be {@link #STREAM_VOICE_CALL} or {@link #STREAM_BLUETOOTH_SCO}
		* - the format must be mono
		* - the sampling must be 16kHz or 8kHz
		* <p>The following restrictions apply on input streams:
		* - the format must be mono
		* - the sampling must be 8kHz
		*
		* <p>Note that the phone application always has the priority on the usage of the SCO
		* connection for telephony. If this method is called while the phone is in call
		* it will be ignored. Similarly, if a call is received or sent while an application
		* is using the SCO connection, the connection will be lost for the application and NOT
		* returned automatically when the call ends.
		* @see #stopBluetoothSco()
		* @see #ACTION_SCO_AUDIO_STATE_CHANGED
		*/
		public void startBluetoothSco(){
		IAudioService service = getService();
		try {
		service.startBluetoothSco(mICallBack);
		} catch (RemoteException e) {
		Log.e(TAG, "Dead object in startBluetoothSco", e);
		}
		}

		/**
		* @hide
		* TODO unhide for SDK
		* Stop bluetooth SCO audio connection.
		* <p>Requires Permission:
		* {@link android.Manifest.permission#MODIFY_AUDIO_SETTINGS}.
		* <p>This method must be called by applications having requested the use of
		* bluetooth SCO audio with {@link #startBluetoothSco()}
		* when finished with the SCO connection or if the establishment times out.
		* @see #startBluetoothSco()
		*/
		public void stopBluetoothSco(){
		IAudioService service = getService();
		try {
		service.stopBluetoothSco(mICallBack);
		} catch (RemoteException e) {
		Log.e(TAG, "Dead object in stopBluetoothSco", e);
		}
		}

		/**
		* Request use of Bluetooth SCO headset for communications.
		* <p>

media/java/android/media/AudioService.java

+195 −0

Original line number	Diff line number	Diff line
		@@ -240,6 +240,15 @@ public class AudioService extends IAudioService.Stub {
		// The last process to have called setMode() is at the top of the list.
		private ArrayList <SetModeDeathHandler> mSetModeDeathHandlers = new ArrayList <SetModeDeathHandler>();

		// List of clients having issued a SCO start request
		private ArrayList <ScoClient> mScoClients = new ArrayList <ScoClient>();

		// BluetoothHeadset API to control SCO connection
		private BluetoothHeadset mBluetoothHeadset;

		// Bluetooth headset connection state
		private boolean mBluetoothHeadsetConnected;

		///////////////////////////////////////////////////////////////////////////
		// Construction
		///////////////////////////////////////////////////////////////////////////
		@@ -267,12 +276,17 @@ public class AudioService extends IAudioService.Stub {
		AudioSystem.setErrorCallback(mAudioSystemCallback);
		loadSoundEffects();

		mBluetoothHeadsetConnected = false;
		mBluetoothHeadset = new BluetoothHeadset(context,
		mBluetoothHeadsetServiceListener);

		// Register for device connection intent broadcasts.
		IntentFilter intentFilter =
		new IntentFilter(Intent.ACTION_HEADSET_PLUG);
		intentFilter.addAction(BluetoothA2dp.ACTION_SINK_STATE_CHANGED);
		intentFilter.addAction(BluetoothHeadset.ACTION_STATE_CHANGED);
		intentFilter.addAction(Intent.ACTION_DOCK_EVENT);
		intentFilter.addAction(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
		context.registerReceiver(mReceiver, intentFilter);

		// Register for media button intent broadcasts.
		@@ -705,6 +719,10 @@ public class AudioService extends IAudioService.Stub {
		mSetModeDeathHandlers.add(0, hdlr);
		hdlr.setMode(mode);
		}

		if (mode != AudioSystem.MODE_NORMAL) {
		clearAllScoClients();
		}
		}
		}
		int streamType = getActiveStreamType(AudioManager.USE_DEFAULT_STREAM_TYPE);
		@@ -909,6 +927,157 @@ public class AudioService extends IAudioService.Stub {
		}
		}

		/** @see AudioManager#startBluetoothSco() */
		public void startBluetoothSco(IBinder cb){
		if (!checkAudioSettingsPermission("startBluetoothSco()")) {
		return;
		}
		ScoClient client = getScoClient(cb);
		client.incCount();
		}

		/** @see AudioManager#stopBluetoothSco() */
		public void stopBluetoothSco(IBinder cb){
		if (!checkAudioSettingsPermission("stopBluetoothSco()")) {
		return;
		}
		ScoClient client = getScoClient(cb);
		client.decCount();
		}

		private class ScoClient implements IBinder.DeathRecipient {
		private IBinder mCb; // To be notified of client's death
		private int mStartcount; // number of SCO connections started by this client

		ScoClient(IBinder cb) {
		mCb = cb;
		mStartcount = 0;
		}

		public void binderDied() {
		synchronized(mScoClients) {
		Log.w(TAG, "SCO client died");
		int index = mScoClients.indexOf(this);
		if (index < 0) {
		Log.w(TAG, "unregistered SCO client died");
		} else {
		clearCount(true);
		mScoClients.remove(this);
		}
		}
		}

		public void incCount() {
		synchronized(mScoClients) {
		requestScoState(BluetoothHeadset.AUDIO_STATE_CONNECTED);
		if (mStartcount == 0) {
		try {
		mCb.linkToDeath(this, 0);
		} catch (RemoteException e) {
		// client has already died!
		Log.w(TAG, "ScoClient incCount() could not link to "+mCb+" binder death");
		}
		}
		mStartcount++;
		}
		}

		public void decCount() {
		synchronized(mScoClients) {
		if (mStartcount == 0) {
		Log.w(TAG, "ScoClient.decCount() already 0");
		} else {
		mStartcount--;
		if (mStartcount == 0) {
		mCb.unlinkToDeath(this, 0);
		}
		requestScoState(BluetoothHeadset.AUDIO_STATE_DISCONNECTED);
		}
		}
		}

		public void clearCount(boolean stopSco) {
		synchronized(mScoClients) {
		mStartcount = 0;
		mCb.unlinkToDeath(this, 0);
		if (stopSco) {
		requestScoState(BluetoothHeadset.AUDIO_STATE_DISCONNECTED);
		}
		}
		}

		public int getCount() {
		return mStartcount;
		}

		public IBinder getBinder() {
		return mCb;
		}

		public int totalCount() {
		synchronized(mScoClients) {
		int count = 0;
		int size = mScoClients.size();
		for (int i = 0; i < size; i++) {
		count += mScoClients.get(i).getCount();
		}
		return count;
		}
		}

		private void requestScoState(int state) {
		if (totalCount() == 0 &&
		mBluetoothHeadsetConnected &&
		AudioService.this.mMode == AudioSystem.MODE_NORMAL) {
		if (state == BluetoothHeadset.AUDIO_STATE_CONNECTED) {
		mBluetoothHeadset.startVoiceRecognition();
		} else {
		mBluetoothHeadset.stopVoiceRecognition();
		}
		}
		}
		}

		public ScoClient getScoClient(IBinder cb) {
		synchronized(mScoClients) {
		ScoClient client;
		int size = mScoClients.size();
		for (int i = 0; i < size; i++) {
		client = mScoClients.get(i);
		if (client.getBinder() == cb)
		return client;
		}
		client = new ScoClient(cb);
		mScoClients.add(client);
		return client;
		}
		}

		public void clearAllScoClients() {
		synchronized(mScoClients) {
		int size = mScoClients.size();
		for (int i = 0; i < size; i++) {
		mScoClients.get(i).clearCount(false);
		}
		}
		}

		private BluetoothHeadset.ServiceListener mBluetoothHeadsetServiceListener =
		new BluetoothHeadset.ServiceListener() {
		public void onServiceConnected() {
		if (mBluetoothHeadset != null &&
		mBluetoothHeadset.getState() == BluetoothHeadset.STATE_CONNECTED) {
		mBluetoothHeadsetConnected = true;
		}
		}
		public void onServiceDisconnected() {
		if (mBluetoothHeadset != null &&
		mBluetoothHeadset.getState() == BluetoothHeadset.STATE_DISCONNECTED) {
		mBluetoothHeadsetConnected = false;
		clearAllScoClients();
		}
		}
		};

		///////////////////////////////////////////////////////////////////////////
		// Internal methods
		@@ -1577,11 +1746,14 @@ public class AudioService extends IAudioService.Stub {
		AudioSystem.DEVICE_STATE_UNAVAILABLE,
		address);
		mConnectedDevices.remove(device);
		mBluetoothHeadsetConnected = false;
		clearAllScoClients();
		} else if (!isConnected && state == BluetoothHeadset.STATE_CONNECTED) {
		AudioSystem.setDeviceConnectionState(device,
		AudioSystem.DEVICE_STATE_AVAILABLE,
		address);
		mConnectedDevices.put(new Integer(device), address);
		mBluetoothHeadsetConnected = true;
		}
		} else if (action.equals(Intent.ACTION_HEADSET_PLUG)) {
		int state = intent.getIntExtra("state", 0);
		@@ -1614,6 +1786,29 @@ public class AudioService extends IAudioService.Stub {
		mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE), "");
		}
		}
		} else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) {
		int state = intent.getIntExtra(BluetoothHeadset.EXTRA_AUDIO_STATE,
		BluetoothHeadset.STATE_ERROR);
		synchronized (mScoClients) {
		if (!mScoClients.isEmpty()) {
		switch (state) {
		case BluetoothHeadset.AUDIO_STATE_CONNECTED:
		state = AudioManager.SCO_AUDIO_STATE_CONNECTED;
		break;
		case BluetoothHeadset.AUDIO_STATE_DISCONNECTED:
		state = AudioManager.SCO_AUDIO_STATE_DISCONNECTED;
		break;
		default:
		state = AudioManager.SCO_AUDIO_STATE_ERROR;
		break;
		}
		if (state != AudioManager.SCO_AUDIO_STATE_ERROR) {
		Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
		newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, state);
		mContext.sendStickyBroadcast(newIntent);
		}
		}
		}
		}
		}
		}

media/java/android/media/IAudioService.aidl

+4 −0

Original line number	Diff line number	Diff line
		@@ -82,4 +82,8 @@ interface IAudioService {
		void registerMediaButtonEventReceiver(in ComponentName eventReceiver);

		void unregisterMediaButtonEventReceiver(in ComponentName eventReceiver);

		void startBluetoothSco(IBinder cb);

		void stopBluetoothSco(IBinder cb);
		}