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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.car.hal;
     17 
     18 import static android.hardware.automotive.vehicle.V2_0.VehicleProperty.HW_KEY_INPUT;
     19 
     20 import android.hardware.automotive.vehicle.V2_0.VehicleDisplay;
     21 import android.hardware.automotive.vehicle.V2_0.VehicleHwKeyInputAction;
     22 import android.hardware.automotive.vehicle.V2_0.VehiclePropConfig;
     23 import android.hardware.automotive.vehicle.V2_0.VehiclePropValue;
     24 import android.os.SystemClock;
     25 import android.util.Log;
     26 import android.util.SparseLongArray;
     27 import android.view.InputDevice;
     28 import android.view.KeyEvent;
     29 
     30 import com.android.car.CarLog;
     31 
     32 import java.io.PrintWriter;
     33 import java.util.Collection;
     34 import java.util.LinkedList;
     35 import java.util.List;
     36 
     37 public class InputHalService extends HalServiceBase {
     38 
     39     public static final int DISPLAY_MAIN = VehicleDisplay.MAIN;
     40     public static final int DISPLAY_INSTRUMENT_CLUSTER = VehicleDisplay.INSTRUMENT_CLUSTER;
     41     private final VehicleHal mHal;
     42 
     43     public interface InputListener {
     44         void onKeyEvent(KeyEvent event, int targetDisplay);
     45     }
     46 
     47     private static final boolean DBG = false;
     48 
     49     private boolean mKeyInputSupported = false;
     50     private InputListener mListener;
     51     private final SparseLongArray mKeyDownTimes = new SparseLongArray();
     52 
     53     public InputHalService(VehicleHal hal) {
     54         mHal = hal;
     55     }
     56 
     57     public void setInputListener(InputListener listener) {
     58         synchronized (this) {
     59             if (!mKeyInputSupported) {
     60                 Log.w(CarLog.TAG_INPUT, "input listener set while key input not supported");
     61                 return;
     62             }
     63             mListener = listener;
     64         }
     65         mHal.subscribeProperty(this, HW_KEY_INPUT);
     66     }
     67 
     68     public synchronized boolean isKeyInputSupported() {
     69         return mKeyInputSupported;
     70     }
     71 
     72     @Override
     73     public void init() {
     74     }
     75 
     76     @Override
     77     public void release() {
     78         synchronized (this) {
     79             mListener = null;
     80             mKeyInputSupported = false;
     81         }
     82     }
     83 
     84     @Override
     85     public Collection<VehiclePropConfig> takeSupportedProperties(
     86             Collection<VehiclePropConfig> allProperties) {
     87         List<VehiclePropConfig> supported = new LinkedList<>();
     88         for (VehiclePropConfig p: allProperties) {
     89             if (p.prop == HW_KEY_INPUT) {
     90                 supported.add(p);
     91                 synchronized (this) {
     92                     mKeyInputSupported = true;
     93                 }
     94             }
     95         }
     96         return supported;
     97     }
     98 
     99     @Override
    100     public void handleHalEvents(List<VehiclePropValue> values) {
    101         InputListener listener;
    102         synchronized (this) {
    103             listener = mListener;
    104         }
    105         if (listener == null) {
    106             Log.w(CarLog.TAG_INPUT, "Input event while listener is null");
    107             return;
    108         }
    109         for (VehiclePropValue v : values) {
    110             if (v.prop != HW_KEY_INPUT) {
    111                 Log.e(CarLog.TAG_INPUT, "Wrong event dispatched, prop:0x" +
    112                         Integer.toHexString(v.prop));
    113                 continue;
    114             }
    115             int action = (v.value.int32Values.get(0) == VehicleHwKeyInputAction.ACTION_DOWN) ?
    116                             KeyEvent.ACTION_DOWN : KeyEvent.ACTION_UP;
    117             int code = v.value.int32Values.get(1);
    118             int display = v.value.int32Values.get(2);
    119             if (DBG) {
    120                 Log.i(CarLog.TAG_INPUT, "hal event code:" + code + ", action:" + action +
    121                         ", display:" + display);
    122             }
    123 
    124             dispatchKeyEvent(listener, action, code, display);
    125         }
    126     }
    127 
    128     private void dispatchKeyEvent(InputListener listener, int action, int code, int display) {
    129         long eventTime = SystemClock.uptimeMillis();
    130 
    131         if (action == KeyEvent.ACTION_DOWN) {
    132             mKeyDownTimes.put(code, eventTime);
    133         }
    134 
    135         long downTime = action == KeyEvent.ACTION_UP
    136                 ? mKeyDownTimes.get(code, eventTime) : eventTime;
    137 
    138         KeyEvent event = KeyEvent.obtain(
    139                 downTime,
    140                 eventTime,
    141                 action,
    142                 code,
    143                 0 /* repeat */,
    144                 0 /* meta state */,
    145                 0 /* deviceId*/,
    146                 0 /* scancode */,
    147                 0 /* flags */,
    148                 InputDevice.SOURCE_CLASS_BUTTON,
    149                 null /* characters */);
    150 
    151         listener.onKeyEvent(event, display);
    152         event.recycle();
    153     }
    154 
    155     @Override
    156     public void dump(PrintWriter writer) {
    157         writer.println("*Input HAL*");
    158         writer.println("mKeyInputSupported:" + mKeyInputSupported);
    159     }
    160 
    161 }
    162