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/******************************************************************************
*
* Copyright 2021 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.
*
******************************************************************************/
package com.android.bluetooth.acm;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothCodecConfig;
import android.bluetooth.BluetoothCodecStatus;
import android.bluetooth.BluetoothDevice;
import android.util.Log;
import java.util.List;
import com.android.bluetooth.Utils;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.annotations.VisibleForTesting;
/**
* ACM Native Interface to/from JNI.
*/
public class AcmNativeInterface {
private static final String TAG = "AcmNativeInterface";
private static final boolean DBG = true;
private BluetoothAdapter mAdapter;
static final int CONTEXT_TYPE_UNKNOWN = 0;
static final int CONTEXT_TYPE_MUSIC = 1;
static final int CONTEXT_TYPE_VOICE = 2;
static final int CONTEXT_TYPE_MUSIC_VOICE = 3;
@GuardedBy("INSTANCE_LOCK")
private static AcmNativeInterface sInstance;
private static final Object INSTANCE_LOCK = new Object();
static {
classInitNative();
}
@VisibleForTesting
private AcmNativeInterface() {
mAdapter = BluetoothAdapter.getDefaultAdapter();
if (mAdapter == null) {
Log.wtf(TAG, "No Bluetooth Adapter Available");
}
}
/**
* Get singleton instance.
*/
public static AcmNativeInterface getInstance() {
synchronized (INSTANCE_LOCK) {
if (sInstance == null) {
sInstance = new AcmNativeInterface();
}
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);
}
/**
* Initiates ACM connection to a remote device.
*
* @param device the remote device
* @return true on success, otherwise false.
*/
public boolean connectAcm(BluetoothDevice device, int contextType, int profileType, int preferredContext) {
return connectAcmNative(getByteAddress(device), contextType, profileType, preferredContext);
}
/**
* Disconnects ACM from a remote device.
*
* @param device the remote device
* @return true on success, otherwise false.
*/
public boolean disconnectAcm(BluetoothDevice device, int contextType) {
return disconnectAcmNative(getByteAddress(device), contextType);
}
/**
* Sets a connected ACM group/remote as active.
*
* @param device the remote device
* @return true on success, otherwise false.
*/
public boolean setActiveDevice(BluetoothDevice device, int contextType) {
return setActiveDeviceNative(getByteAddress(device), contextType);
}
/**
* Sends Start stream to remote group/remote for voice call.
*
* @param device the remote device
* @return true on success, otherwise false.
*/
public boolean startStream(BluetoothDevice device, int contextType) {
return startStreamNative(getByteAddress(device), contextType);
}
/**
* Sends Stop stream to remote group/remote for voice call.
*
* @param device the remote device
* @return true on success, otherwise false.
*/
public boolean stopStream(BluetoothDevice device, int contextType) {
return stopStreamNative(getByteAddress(device), contextType);
}
/**
* 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,
int contextType, int preferredContext) {
return setCodecConfigPreferenceNative(getByteAddress(device), codecConfigArray,
contextType, preferredContext);
}
public boolean ChangeCodecConfigPreference(BluetoothDevice device,
String message) {
return ChangeCodecConfigPreferenceNative(getByteAddress(device), message);
}
/**
* Cleanup the native interface.
*/
public void cleanup() {
cleanupNative();
}
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(AcmStackEvent event) {
AcmService service = AcmService.getAcmService();
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, int contextType) {
AcmStackEvent event =
new AcmStackEvent(AcmStackEvent.EVENT_TYPE_CONNECTION_STATE_CHANGED);
event.device = getDevice(address);
event.valueInt1 = state;
event.valueInt2 = contextType;
if (DBG) {
Log.d(TAG, "onConnectionStateChanged: " + event);
}
sendMessageToService(event);
}
private void onAudioStateChanged(byte[] address, int state, int contextType) {
AcmStackEvent event = new AcmStackEvent(AcmStackEvent.EVENT_TYPE_AUDIO_STATE_CHANGED);
event.device = getDevice(address);
event.valueInt1 = state;
event.valueInt2 = contextType;
if (DBG) {
Log.d(TAG, "onAudioStateChanged: " + event);
}
sendMessageToService(event);
}
private void onCodecConfigChanged(byte[] address,
BluetoothCodecConfig newCodecConfig,
BluetoothCodecConfig[] codecsLocalCapabilities,
BluetoothCodecConfig[] codecsSelectableCapabilities, int contextType) {
AcmStackEvent event = new AcmStackEvent(AcmStackEvent.EVENT_TYPE_CODEC_CONFIG_CHANGED);
event.device = getDevice(address);
event.codecStatus = new BluetoothCodecStatus(newCodecConfig,
codecsLocalCapabilities,
codecsSelectableCapabilities);
event.valueInt2 = contextType;
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 boolean connectAcmNative(byte[] address, int contextType, int profileType, int preferredContext);
private native boolean disconnectAcmNative(byte[] address, int contextType);
private native boolean setActiveDeviceNative(byte[] address, int contextType);
private native boolean startStreamNative(byte[] address, int contextType);
private native boolean stopStreamNative(byte[] address, int contextType);
private native boolean setCodecConfigPreferenceNative(byte[] address,
BluetoothCodecConfig[] codecConfigArray, int contextType, int preferredContext);
private native boolean ChangeCodecConfigPreferenceNative(byte[] address, String Id);
private native void cleanupNative();
}
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