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      1 /*
      2  * Copyright (C) 2013 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 
     17 package com.android.server;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.content.pm.PackageManager;
     24 import android.database.ContentObserver;
     25 import android.hardware.input.InputManager;
     26 import android.hardware.IConsumerIrService;
     27 import android.os.Handler;
     28 import android.os.PowerManager;
     29 import android.os.Process;
     30 import android.os.RemoteException;
     31 import android.os.IBinder;
     32 import android.os.Binder;
     33 import android.os.ServiceManager;
     34 import android.os.SystemClock;
     35 import android.os.UserHandle;
     36 import android.os.WorkSource;
     37 import android.provider.Settings;
     38 import android.provider.Settings.SettingNotFoundException;
     39 import android.util.Slog;
     40 import android.view.InputDevice;
     41 
     42 import java.lang.RuntimeException;
     43 import java.util.ArrayList;
     44 import java.util.LinkedList;
     45 import java.util.ListIterator;
     46 
     47 public class ConsumerIrService extends IConsumerIrService.Stub {
     48     private static final String TAG = "ConsumerIrService";
     49 
     50     private static final int MAX_XMIT_TIME = 2000000; /* in microseconds */
     51 
     52     private static native int halOpen();
     53     private static native int halTransmit(int halObject, int carrierFrequency, int[] pattern);
     54     private static native int[] halGetCarrierFrequencies(int halObject);
     55 
     56     private final Context mContext;
     57     private final PowerManager.WakeLock mWakeLock;
     58     private final int mHal;
     59     private final Object mHalLock = new Object();
     60 
     61     ConsumerIrService(Context context) {
     62         mContext = context;
     63         PowerManager pm = (PowerManager)context.getSystemService(
     64                 Context.POWER_SERVICE);
     65         mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
     66         mWakeLock.setReferenceCounted(true);
     67 
     68         mHal = halOpen();
     69         if (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CONSUMER_IR)) {
     70             if (mHal == 0) {
     71                 throw new RuntimeException("FEATURE_CONSUMER_IR present, but no IR HAL loaded!");
     72             }
     73         } else if (mHal != 0) {
     74             throw new RuntimeException("IR HAL present, but FEATURE_CONSUMER_IR is not set!");
     75         }
     76     }
     77 
     78     @Override
     79     public boolean hasIrEmitter() {
     80         return mHal != 0;
     81     }
     82 
     83     private void throwIfNoIrEmitter() {
     84         if (mHal == 0) {
     85             throw new UnsupportedOperationException("IR emitter not available");
     86         }
     87     }
     88 
     89 
     90     @Override
     91     public void transmit(String packageName, int carrierFrequency, int[] pattern) {
     92         if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.TRANSMIT_IR)
     93                 != PackageManager.PERMISSION_GRANTED) {
     94             throw new SecurityException("Requires TRANSMIT_IR permission");
     95         }
     96 
     97         long totalXmitTime = 0;
     98 
     99         for (int slice : pattern) {
    100             if (slice <= 0) {
    101                 throw new IllegalArgumentException("Non-positive IR slice");
    102             }
    103             totalXmitTime += slice;
    104         }
    105 
    106         if (totalXmitTime > MAX_XMIT_TIME ) {
    107             throw new IllegalArgumentException("IR pattern too long");
    108         }
    109 
    110         throwIfNoIrEmitter();
    111 
    112         // Right now there is no mechanism to ensure fair queing of IR requests
    113         synchronized (mHalLock) {
    114             int err = halTransmit(mHal, carrierFrequency, pattern);
    115 
    116             if (err < 0) {
    117                 Slog.e(TAG, "Error transmitting: " + err);
    118             }
    119         }
    120     }
    121 
    122     @Override
    123     public int[] getCarrierFrequencies() {
    124         if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.TRANSMIT_IR)
    125                 != PackageManager.PERMISSION_GRANTED) {
    126             throw new SecurityException("Requires TRANSMIT_IR permission");
    127         }
    128 
    129         throwIfNoIrEmitter();
    130 
    131         synchronized(mHalLock) {
    132             return halGetCarrierFrequencies(mHal);
    133         }
    134     }
    135 }
    136