Add Bluetooth LE Audio Profile (1/3) (fc3722a2) · Commits · e / os / android_packages_modules_Bluetooth

android/app/AndroidManifest.xml

+8 −0

Original line number	Diff line number	Diff line
		@@ -405,6 +405,14 @@
		<action android:name="android.bluetooth.IBluetoothHearingAid"/>
		</intent-filter>
		</service>
		<service
		android:process="@string/process"
		android:name = ".le_audio.LeAudioService"
		android:exported = "true">
		<intent-filter>
		<action android:name="android.bluetooth.IBluetoothLeAudio" />
		</intent-filter>
		</service>
		<!-- Authenticator for PBAP account. -->
		<service android:process="@string/process"
		android:name=".pbapclient.AuthenticationService"

android/app/src/com/android/bluetooth/le_audio/LeAudioService.java

0 → 100644

+393 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2020 HIMSA II K/S - www.himsa.com.
		* Represented by EHIMA - www.ehima.com
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.bluetooth.le_audio;

		import static android.bluetooth.IBluetoothLeAudio.LE_AUDIO_GROUP_ID_INVALID;

		import android.bluetooth.BluetoothDevice;
		import android.bluetooth.BluetoothProfile;
		import android.bluetooth.IBluetoothLeAudio;
		import android.os.HandlerThread;
		import android.util.Log;

		import com.android.bluetooth.Utils;
		import com.android.bluetooth.btservice.AdapterService;
		import com.android.bluetooth.btservice.ProfileService;
		import com.android.bluetooth.btservice.storage.DatabaseManager;
		import com.android.internal.annotations.VisibleForTesting;

		import java.util.ArrayList;
		import java.util.List;
		import java.util.Objects;

		/**
		* Provides Bluetooth LeAudio profile, as a service in the Bluetooth application.
		* @hide
		*/
		public class LeAudioService extends ProfileService {
		private static final boolean DBG = true;
		private static final String TAG = "LeAudioService";

		private static LeAudioService sLeAudioService;

		private AdapterService mAdapterService;
		private DatabaseManager mDatabaseManager;
		private HandlerThread mStateMachinesThread;

		@Override
		protected IProfileServiceBinder initBinder() {
		return new BluetoothLeAudioBinder(this);
		}

		@Override
		protected void create() {
		Log.i(TAG, "create()");
		}

		@Override
		protected boolean start() {
		Log.i(TAG, "start()");
		if (sLeAudioService != null) {
		throw new IllegalStateException("start() called twice");
		}

		// Get AdapterService, AudioManager. None of them can be null.
		mAdapterService = Objects.requireNonNull(AdapterService.getAdapterService(),
		"AdapterService cannot be null when LeAudioService starts");
		mDatabaseManager = Objects.requireNonNull(mAdapterService.getDatabase(),
		"DatabaseManager cannot be null when A2dpService starts");

		// Mark service as started
		setLeAudioService(this);

		setActiveDevice(null);
		return true;
		}

		@Override
		protected boolean stop() {
		Log.i(TAG, "stop()");
		if (sLeAudioService == null) {
		Log.w(TAG, "stop() called before start()");
		return true;
		}

		setActiveDevice(null);

		// Set the service and BLE devices as inactive
		setLeAudioService(null);

		mAdapterService = null;
		return true;
		}

		@Override
		protected void cleanup() {
		Log.i(TAG, "cleanup()");
		}

		public static synchronized LeAudioService getLeAudioService() {
		if (sLeAudioService == null) {
		Log.w(TAG, "getLeAudioService(): service is NULL");
		return null;
		}
		if (!sLeAudioService.isAvailable()) {
		Log.w(TAG, "getLeAudioService(): service is not available");
		return null;
		}
		return sLeAudioService;
		}

		private static synchronized void setLeAudioService(LeAudioService instance) {
		if (DBG) {
		Log.d(TAG, "setLeAudioService(): set to: " + instance);
		}
		sLeAudioService = instance;
		}

		public boolean connect(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH ADMIN permission");
		if (DBG) {
		Log.d(TAG, "connect(): " + device);
		}

		if (getConnectionPolicy(device) == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN) {
		Log.e(TAG, "Cannot connect to " + device + " : CONNECTION_POLICY_FORBIDDEN");
		return false;
		}

		//TODO: implement
		return false;
		}

		/**
		* Disconnects LE Audio for the remote bluetooth device
		*
		* @param device is the device with which we would like to disconnect LE Audio
		* @return true if profile disconnected, false if device not connected over LE Audio
		*/
		public boolean disconnect(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH ADMIN permission");
		if (DBG) {
		Log.d(TAG, "disconnect(): " + device);
		}

		//TODO: implement
		return false;
		}

		List<BluetoothDevice> getConnectedDevices() {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		List<BluetoothDevice> devices = new ArrayList<>();
		return devices;
		}

		List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");
		ArrayList<BluetoothDevice> devices = new ArrayList<>();
		return devices;
		}

		public int getConnectionState(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission");

		//TODO: implement
		return BluetoothProfile.STATE_DISCONNECTED;
		}

		/**
		* Set the active device.
		*
		* @param device the new active device
		* @return true on success, otherwise false
		*/
		public boolean setActiveDevice(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH ADMIN permission");
		if (DBG) {
		Log.d(TAG, "setActiveDevice:" + device);
		}

		return true;
		}

		/**
		* Get the connected physical LeAudio devices that are active.
		*
		* @return the list of active devices.
		*/
		List<BluetoothDevice> getActiveDevices() {
		if (DBG) {
		Log.d(TAG, "getActiveDevices");
		}
		ArrayList<BluetoothDevice> activeDevices = new ArrayList<>();
		return activeDevices;
		}

		/**
		* Set connection policy of the profile and connects it if connectionPolicy is
		* {@link BluetoothProfile#CONNECTION_POLICY_ALLOWED} or disconnects if connectionPolicy is
		* {@link BluetoothProfile#CONNECTION_POLICY_FORBIDDEN}
		*
		* <p> The device should already be paired.
		* Connection policy can be one of:
		* {@link BluetoothProfile#CONNECTION_POLICY_ALLOWED},
		* {@link BluetoothProfile#CONNECTION_POLICY_FORBIDDEN},
		* {@link BluetoothProfile#CONNECTION_POLICY_UNKNOWN}
		*
		* @param device the remote device
		* @param connectionPolicy is the connection policy to set to for this profile
		* @return true on success, otherwise false
		*/
		public boolean setConnectionPolicy(BluetoothDevice device, int connectionPolicy) {
		enforceCallingOrSelfPermission(BLUETOOTH_PRIVILEGED,
		"Need BLUETOOTH_PRIVILEGED permission");
		if (DBG) {
		Log.d(TAG, "Saved connectionPolicy " + device + " = " + connectionPolicy);
		}

		if (!mDatabaseManager.setProfileConnectionPolicy(device, BluetoothProfile.LE_AUDIO,
		connectionPolicy)) {
		return false;
		}
		if (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_ALLOWED) {
		connect(device);
		} else if (connectionPolicy == BluetoothProfile.CONNECTION_POLICY_FORBIDDEN) {
		disconnect(device);
		}
		return true;
		}

		/**
		* Get the connection policy of the profile.
		*
		* <p> The connection policy can be any of:
		* {@link BluetoothProfile#CONNECTION_POLICY_ALLOWED},
		* {@link BluetoothProfile#CONNECTION_POLICY_FORBIDDEN},
		* {@link BluetoothProfile#CONNECTION_POLICY_UNKNOWN}
		*
		* @param device Bluetooth device
		* @return connection policy of the device
		* @hide
		*/
		public int getConnectionPolicy(BluetoothDevice device) {
		enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH_ADMIN permission");
		return mDatabaseManager
		.getProfileConnectionPolicy(device, BluetoothProfile.LE_AUDIO);
		}

		/**
		* Get device group id. Devices with same group id belong to same group (i.e left and right
		* earbud)
		* @param device LE Audio capable device
		* @return group id that this device currently belongs to
		*/
		public int getGroupId(BluetoothDevice device) {
		if (device == null) {
		return LE_AUDIO_GROUP_ID_INVALID;
		}
		//TODO: implement
		return LE_AUDIO_GROUP_ID_INVALID;
		}

		/**
		* Binder object: must be a static class or memory leak may occur
		*/
		@VisibleForTesting
		static class BluetoothLeAudioBinder extends IBluetoothLeAudio.Stub
		implements IProfileServiceBinder {
		private LeAudioService mService;

		private LeAudioService getService() {
		if (!Utils.checkCaller()) {
		Log.w(TAG, "LeAudio call not allowed for non-active user");
		return null;
		}

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

		BluetoothLeAudioBinder(LeAudioService svc) {
		mService = svc;
		}

		@Override
		public void cleanup() {
		mService = null;
		}

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

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

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

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

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

		@Override
		public boolean setActiveDevice(BluetoothDevice device) {
		LeAudioService service = getService();
		if (service == null) {
		return false;
		}
		return service.setActiveDevice(device);
		}

		@Override
		public List<BluetoothDevice> getActiveDevices() {
		LeAudioService service = getService();
		if (service == null) {
		return new ArrayList<>();
		}
		return service.getActiveDevices();
		}

		@Override
		public boolean setConnectionPolicy(BluetoothDevice device, int connectionPolicy) {
		LeAudioService service = getService();
		if (service == null) {
		return false;
		}
		return service.setConnectionPolicy(device, connectionPolicy);
		}

		@Override
		public int getConnectionPolicy(BluetoothDevice device) {
		LeAudioService service = getService();
		if (service == null) {
		return BluetoothProfile.CONNECTION_POLICY_UNKNOWN;
		}
		return service.getConnectionPolicy(device);
		}

		@Override
		public int getGroupId(BluetoothDevice device) {
		LeAudioService service = getService();
		if (service == null) {
		return LE_AUDIO_GROUP_ID_INVALID;
		}

		return service.getGroupId(device);
		}
		}

		@Override
		public void dump(StringBuilder sb) {
		super.dump(sb);
		// TODO: Dump all state machines
		}
		}