| /* |
| * Copyright (C) 2007 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 android.bluetooth; |
| |
| import android.os.Handler; |
| import android.os.PowerManager; |
| import android.os.PowerManager.WakeLock; |
| import android.util.Log; |
| |
| /** |
| * The Android Bluetooth API is not finalized, and *will* change. Use at your |
| * own risk. |
| * |
| * The base RFCOMM (service) connection for a headset or handsfree device. |
| * |
| * In the future this class will be removed. |
| * |
| * @hide |
| */ |
| public final class HeadsetBase { |
| private static final String TAG = "Bluetooth HeadsetBase"; |
| private static final boolean DBG = false; |
| |
| public static final int RFCOMM_DISCONNECTED = 1; |
| |
| public static final int DIRECTION_INCOMING = 1; |
| public static final int DIRECTION_OUTGOING = 2; |
| |
| private static int sAtInputCount = 0; /* TODO: Consider not using a static variable */ |
| |
| private final BluetoothAdapter mAdapter; |
| private final BluetoothDevice mRemoteDevice; |
| private final String mAddress; // for native code |
| private final int mRfcommChannel; |
| private int mNativeData; |
| private Thread mEventThread; |
| private volatile boolean mEventThreadInterrupted; |
| private Handler mEventThreadHandler; |
| private int mTimeoutRemainingMs; |
| private final int mDirection; |
| private final long mConnectTimestamp; |
| |
| protected AtParser mAtParser; |
| |
| private WakeLock mWakeLock; // held while processing an AT command |
| |
| private native static void classInitNative(); |
| static { |
| classInitNative(); |
| } |
| |
| protected void finalize() throws Throwable { |
| try { |
| cleanupNativeDataNative(); |
| releaseWakeLock(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| |
| private native void cleanupNativeDataNative(); |
| |
| public HeadsetBase(PowerManager pm, BluetoothAdapter adapter, |
| BluetoothDevice device, int rfcommChannel) { |
| mDirection = DIRECTION_OUTGOING; |
| mConnectTimestamp = System.currentTimeMillis(); |
| mAdapter = adapter; |
| mRemoteDevice = device; |
| mAddress = device.getAddress(); |
| mRfcommChannel = rfcommChannel; |
| mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "HeadsetBase"); |
| mWakeLock.setReferenceCounted(false); |
| initializeAtParser(); |
| // Must be called after this.mAddress is set. |
| initializeNativeDataNative(-1); |
| } |
| |
| /* Create from an existing rfcomm connection */ |
| public HeadsetBase(PowerManager pm, BluetoothAdapter adapter, |
| BluetoothDevice device, |
| int socketFd, int rfcommChannel, Handler handler) { |
| mDirection = DIRECTION_INCOMING; |
| mConnectTimestamp = System.currentTimeMillis(); |
| mAdapter = adapter; |
| mRemoteDevice = device; |
| mAddress = device.getAddress(); |
| mRfcommChannel = rfcommChannel; |
| mEventThreadHandler = handler; |
| mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "HeadsetBase"); |
| mWakeLock.setReferenceCounted(false); |
| initializeAtParser(); |
| // Must be called after this.mAddress is set. |
| initializeNativeDataNative(socketFd); |
| } |
| |
| private native void initializeNativeDataNative(int socketFd); |
| |
| /* Process an incoming AT command line |
| */ |
| protected void handleInput(String input) { |
| acquireWakeLock(); |
| long timestamp; |
| |
| synchronized(HeadsetBase.class) { |
| if (sAtInputCount == Integer.MAX_VALUE) { |
| sAtInputCount = 0; |
| } else { |
| sAtInputCount++; |
| } |
| } |
| |
| if (DBG) timestamp = System.currentTimeMillis(); |
| AtCommandResult result = mAtParser.process(input); |
| if (DBG) Log.d(TAG, "Processing " + input + " took " + |
| (System.currentTimeMillis() - timestamp) + " ms"); |
| |
| if (result.getResultCode() == AtCommandResult.ERROR) { |
| Log.i(TAG, "Error processing <" + input + ">"); |
| } |
| |
| sendURC(result.toString()); |
| |
| releaseWakeLock(); |
| } |
| |
| /** |
| * Register AT commands that are common to all Headset / Handsets. This |
| * function is called by the HeadsetBase constructor. |
| */ |
| protected void initializeAtParser() { |
| mAtParser = new AtParser(); |
| |
| //TODO(): Get rid of this as there are no parsers registered. But because of dependencies |
| // it needs to be done as part of refactoring HeadsetBase and BluetoothHandsfree |
| } |
| |
| public AtParser getAtParser() { |
| return mAtParser; |
| } |
| |
| public void startEventThread() { |
| mEventThread = |
| new Thread("HeadsetBase Event Thread") { |
| public void run() { |
| int last_read_error; |
| while (!mEventThreadInterrupted) { |
| String input = readNative(500); |
| if (input != null) { |
| handleInput(input); |
| } else { |
| last_read_error = getLastReadStatusNative(); |
| if (last_read_error != 0) { |
| Log.i(TAG, "headset read error " + last_read_error); |
| if (mEventThreadHandler != null) { |
| mEventThreadHandler.obtainMessage(RFCOMM_DISCONNECTED) |
| .sendToTarget(); |
| } |
| disconnectNative(); |
| break; |
| } |
| } |
| } |
| } |
| }; |
| mEventThreadInterrupted = false; |
| mEventThread.start(); |
| } |
| |
| private native String readNative(int timeout_ms); |
| private native int getLastReadStatusNative(); |
| |
| private void stopEventThread() { |
| mEventThreadInterrupted = true; |
| mEventThread.interrupt(); |
| try { |
| mEventThread.join(); |
| } catch (java.lang.InterruptedException e) { |
| // FIXME: handle this, |
| } |
| mEventThread = null; |
| } |
| |
| public boolean connect(Handler handler) { |
| if (mEventThread == null) { |
| if (!connectNative()) return false; |
| mEventThreadHandler = handler; |
| } |
| return true; |
| } |
| private native boolean connectNative(); |
| |
| /* |
| * Returns true when either the asynchronous connect is in progress, or |
| * the connect is complete. Call waitForAsyncConnect() to find out whether |
| * the connect is actually complete, or disconnect() to cancel. |
| */ |
| |
| public boolean connectAsync() { |
| int ret = connectAsyncNative(); |
| return (ret == 0) ? true : false; |
| } |
| private native int connectAsyncNative(); |
| |
| public int getRemainingAsyncConnectWaitingTimeMs() { |
| return mTimeoutRemainingMs; |
| } |
| |
| /* |
| * Returns 1 when an async connect is complete, 0 on timeout, and -1 on |
| * error. On error, handler will be called, and you need to re-initiate |
| * the async connect. |
| */ |
| public int waitForAsyncConnect(int timeout_ms, Handler handler) { |
| int res = waitForAsyncConnectNative(timeout_ms); |
| if (res > 0) { |
| mEventThreadHandler = handler; |
| } |
| return res; |
| } |
| private native int waitForAsyncConnectNative(int timeout_ms); |
| |
| public void disconnect() { |
| if (mEventThread != null) { |
| stopEventThread(); |
| } |
| disconnectNative(); |
| } |
| private native void disconnectNative(); |
| |
| |
| /* |
| * Note that if a remote side disconnects, this method will still return |
| * true until disconnect() is called. You know when a remote side |
| * disconnects because you will receive the intent |
| * IBluetoothService.REMOTE_DEVICE_DISCONNECTED_ACTION. If, when you get |
| * this intent, method isConnected() returns true, you know that the |
| * disconnect was initiated by the remote device. |
| */ |
| |
| public boolean isConnected() { |
| return mEventThread != null; |
| } |
| |
| public BluetoothDevice getRemoteDevice() { |
| return mRemoteDevice; |
| } |
| |
| public int getDirection() { |
| return mDirection; |
| } |
| |
| public long getConnectTimestamp() { |
| return mConnectTimestamp; |
| } |
| |
| public synchronized boolean sendURC(String urc) { |
| if (urc.length() > 0) { |
| boolean ret = sendURCNative(urc); |
| return ret; |
| } |
| return true; |
| } |
| private native boolean sendURCNative(String urc); |
| |
| private synchronized void acquireWakeLock() { |
| if (!mWakeLock.isHeld()) { |
| mWakeLock.acquire(); |
| } |
| } |
| |
| private synchronized void releaseWakeLock() { |
| if (mWakeLock.isHeld()) { |
| mWakeLock.release(); |
| } |
| } |
| |
| public static int getAtInputCount() { |
| return sAtInputCount; |
| } |
| |
| private static void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |