| /* |
| * Copyright (C) 2008 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.Message; |
| 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. |
| * |
| * Simple SCO Socket. |
| * Currently in Android, there is no support for sending data over a SCO |
| * socket - this is managed by the hardware link to the Bluetooth Chip. This |
| * class is instead intended for management of the SCO socket lifetime, |
| * and is tailored for use with the headset / handsfree profiles. |
| * @hide |
| */ |
| public class ScoSocket { |
| private static final String TAG = "ScoSocket"; |
| private static final boolean DBG = true; |
| private static final boolean VDBG = false; // even more logging |
| |
| public static final int STATE_READY = 1; // Ready for use. No threads or sockets |
| public static final int STATE_ACCEPT = 2; // accept() thread running |
| public static final int STATE_CONNECTING = 3; // connect() thread running |
| public static final int STATE_CONNECTED = 4; // connected, waiting for close() |
| public static final int STATE_CLOSED = 5; // was connected, now closed. |
| |
| private int mState; |
| private int mNativeData; |
| private Handler mHandler; |
| private int mAcceptedCode; |
| private int mConnectedCode; |
| private int mClosedCode; |
| |
| private WakeLock mWakeLock; // held while in STATE_CONNECTING |
| |
| static { |
| classInitNative(); |
| } |
| private native static void classInitNative(); |
| |
| public ScoSocket(PowerManager pm, Handler handler, int acceptedCode, int connectedCode, |
| int closedCode) { |
| initNative(); |
| mState = STATE_READY; |
| mHandler = handler; |
| mAcceptedCode = acceptedCode; |
| mConnectedCode = connectedCode; |
| mClosedCode = closedCode; |
| mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "ScoSocket"); |
| mWakeLock.setReferenceCounted(false); |
| if (VDBG) log(this + " SCO OBJECT CTOR"); |
| } |
| private native void initNative(); |
| |
| protected void finalize() throws Throwable { |
| try { |
| if (VDBG) log(this + " SCO OBJECT DTOR"); |
| destroyNative(); |
| releaseWakeLockNow(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| private native void destroyNative(); |
| |
| /** Connect this SCO socket to the given BT address. |
| * Does not block. |
| */ |
| public synchronized boolean connect(String address, String name) { |
| if (DBG) log("connect() " + this); |
| if (mState != STATE_READY) { |
| if (DBG) log("connect(): Bad state"); |
| return false; |
| } |
| acquireWakeLock(); |
| if (connectNative(address, name)) { |
| mState = STATE_CONNECTING; |
| return true; |
| } else { |
| mState = STATE_CLOSED; |
| releaseWakeLockNow(); |
| return false; |
| } |
| } |
| private native boolean connectNative(String address, String name); |
| |
| /** Accept incoming SCO connections. |
| * Does not block. |
| */ |
| public synchronized boolean accept() { |
| if (VDBG) log("accept() " + this); |
| if (mState != STATE_READY) { |
| if (DBG) log("Bad state"); |
| return false; |
| } |
| if (acceptNative()) { |
| mState = STATE_ACCEPT; |
| return true; |
| } else { |
| mState = STATE_CLOSED; |
| return false; |
| } |
| } |
| private native boolean acceptNative(); |
| |
| public synchronized void close() { |
| if (DBG) log(this + " SCO OBJECT close() mState = " + mState); |
| acquireWakeLock(); |
| mState = STATE_CLOSED; |
| closeNative(); |
| releaseWakeLock(); |
| } |
| private native void closeNative(); |
| |
| public synchronized int getState() { |
| return mState; |
| } |
| |
| private synchronized void onConnected(int result) { |
| if (VDBG) log(this + " onConnected() mState = " + mState + " " + this); |
| if (mState != STATE_CONNECTING) { |
| if (DBG) log("Strange state, closing " + mState + " " + this); |
| return; |
| } |
| if (result >= 0) { |
| mState = STATE_CONNECTED; |
| } else { |
| mState = STATE_CLOSED; |
| } |
| mHandler.obtainMessage(mConnectedCode, mState, -1, this).sendToTarget(); |
| releaseWakeLockNow(); |
| } |
| |
| private synchronized void onAccepted(int result) { |
| if (VDBG) log("onAccepted() " + this); |
| if (mState != STATE_ACCEPT) { |
| if (DBG) log("Strange state " + this); |
| return; |
| } |
| if (result >= 0) { |
| mState = STATE_CONNECTED; |
| } else { |
| mState = STATE_CLOSED; |
| } |
| mHandler.obtainMessage(mAcceptedCode, mState, -1, this).sendToTarget(); |
| } |
| |
| private synchronized void onClosed() { |
| if (DBG) log("onClosed() " + this); |
| if (mState != STATE_CLOSED) { |
| mState = STATE_CLOSED; |
| mHandler.obtainMessage(mClosedCode, mState, -1, this).sendToTarget(); |
| releaseWakeLock(); |
| } |
| } |
| |
| private void acquireWakeLock() { |
| if (!mWakeLock.isHeld()) { |
| mWakeLock.acquire(); |
| if (VDBG) log("mWakeLock.acquire() " + this); |
| } |
| } |
| |
| private void releaseWakeLock() { |
| if (mWakeLock.isHeld()) { |
| // Keep apps processor awake for a further 2 seconds. |
| // This is a hack to resolve issue http://b/1616263 - in which |
| // we are left in a 80 mA power state when remotely terminating a |
| // call while connected to BT headset "HTC BH S100 " with A2DP and |
| // HFP profiles. |
| if (VDBG) log("mWakeLock.release() in 2 sec" + this); |
| mWakeLock.acquire(2000); |
| } |
| } |
| |
| private void releaseWakeLockNow() { |
| if (mWakeLock.isHeld()) { |
| if (VDBG) log("mWakeLock.release() now" + this); |
| mWakeLock.release(); |
| } |
| } |
| |
| private void log(String msg) { |
| Log.d(TAG, msg); |
| } |
| } |