| /* |
| * Copyright 2018 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. |
| */ |
| |
| /* |
| * Defines the native interface that is used by state machine/service to |
| * send or receive messages from the native stack. This file is registered |
| * for the native methods in the corresponding JNI C++ file. |
| */ |
| package com.android.bluetooth.hearingaid; |
| |
| import android.bluetooth.BluetoothAdapter; |
| import android.bluetooth.BluetoothDevice; |
| import android.util.Log; |
| |
| import com.android.bluetooth.Utils; |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * HearingAid Native Interface to/from JNI. |
| */ |
| public class HearingAidNativeInterface { |
| private static final String TAG = "HearingAidNativeInterface"; |
| private static final boolean DBG = true; |
| private BluetoothAdapter mAdapter; |
| |
| @GuardedBy("INSTANCE_LOCK") |
| private static HearingAidNativeInterface sInstance; |
| private static final Object INSTANCE_LOCK = new Object(); |
| |
| static { |
| classInitNative(); |
| } |
| |
| private HearingAidNativeInterface() { |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| if (mAdapter == null) { |
| Log.wtf(TAG, "No Bluetooth Adapter Available"); |
| } |
| } |
| |
| /** |
| * Get singleton instance. |
| */ |
| public static HearingAidNativeInterface getInstance() { |
| synchronized (INSTANCE_LOCK) { |
| if (sInstance == null) { |
| sInstance = new HearingAidNativeInterface(); |
| } |
| return sInstance; |
| } |
| } |
| |
| /** |
| * Initializes the native interface. |
| * |
| * priorities to configure. |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public void init() { |
| initNative(); |
| } |
| |
| /** |
| * Cleanup the native interface. |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public void cleanup() { |
| cleanupNative(); |
| } |
| |
| /** |
| * Initiates HearingAid connection to a remote device. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public boolean connectHearingAid(BluetoothDevice device) { |
| return connectHearingAidNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Disconnects HearingAid from a remote device. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public boolean disconnectHearingAid(BluetoothDevice device) { |
| return disconnectHearingAidNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Add a hearing aid device to acceptlist. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public boolean addToAcceptlist(BluetoothDevice device) { |
| return addToAcceptlistNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Sets the HearingAid volume |
| * @param volume |
| */ |
| @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE) |
| public void setVolume(int volume) { |
| setVolumeNative(volume); |
| } |
| |
| private BluetoothDevice getDevice(byte[] address) { |
| return mAdapter.getRemoteDevice(address); |
| } |
| |
| private byte[] getByteAddress(BluetoothDevice device) { |
| if (device == null) { |
| return Utils.getBytesFromAddress("00:00:00:00:00:00"); |
| } |
| return Utils.getBytesFromAddress(device.getAddress()); |
| } |
| |
| private void sendMessageToService(HearingAidStackEvent event) { |
| HearingAidService service = HearingAidService.getHearingAidService(); |
| if (service != null) { |
| service.messageFromNative(event); |
| } else { |
| Log.e(TAG, "Event ignored, service not available: " + event); |
| } |
| } |
| |
| // Callbacks from the native stack back into the Java framework. |
| // All callbacks are routed via the Service which will disambiguate which |
| // state machine the message should be routed to. |
| |
| private void onConnectionStateChanged(int state, byte[] address) { |
| HearingAidStackEvent event = |
| new HearingAidStackEvent(HearingAidStackEvent.EVENT_TYPE_CONNECTION_STATE_CHANGED); |
| event.device = getDevice(address); |
| event.valueInt1 = state; |
| |
| if (DBG) { |
| Log.d(TAG, "onConnectionStateChanged: " + event); |
| } |
| sendMessageToService(event); |
| } |
| |
| private void onDeviceAvailable(byte capabilities, long hiSyncId, byte[] address) { |
| HearingAidStackEvent event = new HearingAidStackEvent( |
| HearingAidStackEvent.EVENT_TYPE_DEVICE_AVAILABLE); |
| event.device = getDevice(address); |
| event.valueInt1 = capabilities; |
| event.valueLong2 = hiSyncId; |
| |
| if (DBG) { |
| Log.d(TAG, "onDeviceAvailable: " + event); |
| } |
| sendMessageToService(event); |
| } |
| |
| // Native methods that call into the JNI interface |
| private static native void classInitNative(); |
| private native void initNative(); |
| private native void cleanupNative(); |
| private native boolean connectHearingAidNative(byte[] address); |
| private native boolean disconnectHearingAidNative(byte[] address); |
| private native boolean addToAcceptlistNative(byte[] address); |
| private native void setVolumeNative(int volume); |
| } |