| /* |
| * Copyright 2017 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 inteface 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.a2dp; |
| |
| import android.bluetooth.BluetoothAdapter; |
| import android.bluetooth.BluetoothCodecConfig; |
| import android.bluetooth.BluetoothCodecStatus; |
| import android.bluetooth.BluetoothDevice; |
| import android.support.annotation.VisibleForTesting; |
| import android.util.Log; |
| |
| import com.android.bluetooth.Utils; |
| import com.android.internal.annotations.GuardedBy; |
| |
| /** |
| * A2DP Native Interface to/from JNI. |
| */ |
| public class A2dpNativeInterface { |
| private static final String TAG = "A2dpNativeInterface"; |
| private static final boolean DBG = true; |
| private BluetoothAdapter mAdapter; |
| |
| @GuardedBy("INSTANCE_LOCK") |
| private static A2dpNativeInterface sInstance; |
| private static final Object INSTANCE_LOCK = new Object(); |
| |
| static { |
| classInitNative(); |
| } |
| |
| @VisibleForTesting |
| private A2dpNativeInterface() { |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| if (mAdapter == null) { |
| Log.wtfStack(TAG, "No Bluetooth Adapter Available"); |
| } |
| } |
| |
| /** |
| * Get singleton instance. |
| */ |
| public static A2dpNativeInterface getInstance() { |
| synchronized (INSTANCE_LOCK) { |
| if (sInstance == null) { |
| sInstance = new A2dpNativeInterface(); |
| } |
| return sInstance; |
| } |
| } |
| |
| /** |
| * Initializes the native interface. |
| * |
| * @param maxConnectedAudioDevices maximum number of A2DP Sink devices that can be connected |
| * simultaneously |
| * @param codecConfigPriorities an array with the codec configuration |
| * priorities to configure. |
| */ |
| public void init(int maxConnectedAudioDevices, BluetoothCodecConfig[] codecConfigPriorities) { |
| initNative(maxConnectedAudioDevices, codecConfigPriorities); |
| } |
| |
| /** |
| * Cleanup the native interface. |
| */ |
| public void cleanup() { |
| cleanupNative(); |
| } |
| |
| /** |
| * Initiates A2DP connection to a remote device. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| public boolean connectA2dp(BluetoothDevice device) { |
| return connectA2dpNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Disconnects A2DP from a remote device. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| public boolean disconnectA2dp(BluetoothDevice device) { |
| return disconnectA2dpNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Sets a connected A2DP remote device as active. |
| * |
| * @param device the remote device |
| * @return true on success, otherwise false. |
| */ |
| public boolean setActiveDevice(BluetoothDevice device) { |
| return setActiveDeviceNative(getByteAddress(device)); |
| } |
| |
| /** |
| * Sets the codec configuration preferences. |
| * |
| * @param device the remote Bluetooth device |
| * @param codecConfigArray an array with the codec configurations to |
| * configure. |
| * @return true on success, otherwise false. |
| */ |
| public boolean setCodecConfigPreference(BluetoothDevice device, |
| BluetoothCodecConfig[] codecConfigArray) { |
| return setCodecConfigPreferenceNative(getByteAddress(device), |
| codecConfigArray); |
| } |
| |
| 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(A2dpStackEvent event) { |
| A2dpService service = A2dpService.getA2dpService(); |
| if (service != null) { |
| service.messageFromNative(event); |
| } else { |
| Log.w(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(byte[] address, int state) { |
| A2dpStackEvent event = |
| new A2dpStackEvent(A2dpStackEvent.EVENT_TYPE_CONNECTION_STATE_CHANGED); |
| event.device = getDevice(address); |
| event.valueInt = state; |
| |
| if (DBG) { |
| Log.d(TAG, "onConnectionStateChanged: " + event); |
| } |
| sendMessageToService(event); |
| } |
| |
| private void onAudioStateChanged(byte[] address, int state) { |
| A2dpStackEvent event = new A2dpStackEvent(A2dpStackEvent.EVENT_TYPE_AUDIO_STATE_CHANGED); |
| event.device = getDevice(address); |
| event.valueInt = state; |
| |
| if (DBG) { |
| Log.d(TAG, "onAudioStateChanged: " + event); |
| } |
| sendMessageToService(event); |
| } |
| |
| private void onCodecConfigChanged(byte[] address, |
| BluetoothCodecConfig newCodecConfig, |
| BluetoothCodecConfig[] codecsLocalCapabilities, |
| BluetoothCodecConfig[] codecsSelectableCapabilities) { |
| A2dpStackEvent event = new A2dpStackEvent(A2dpStackEvent.EVENT_TYPE_CODEC_CONFIG_CHANGED); |
| event.device = getDevice(address); |
| event.codecStatus = new BluetoothCodecStatus(newCodecConfig, |
| codecsLocalCapabilities, |
| codecsSelectableCapabilities); |
| if (DBG) { |
| Log.d(TAG, "onCodecConfigChanged: " + event); |
| } |
| sendMessageToService(event); |
| } |
| |
| // Native methods that call into the JNI interface |
| private static native void classInitNative(); |
| private native void initNative(int maxConnectedAudioDevices, |
| BluetoothCodecConfig[] codecConfigPriorities); |
| private native void cleanupNative(); |
| private native boolean connectA2dpNative(byte[] address); |
| private native boolean disconnectA2dpNative(byte[] address); |
| private native boolean setActiveDeviceNative(byte[] address); |
| private native boolean setCodecConfigPreferenceNative(byte[] address, |
| BluetoothCodecConfig[] codecConfigArray); |
| } |