content/browser/device_sensors/ambient_light_mac.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_
   6 #define CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_
   7
   8 #include <IOKit/IOKitLib.h>
   9
  10 #include "base/memory/scoped_ptr.h"
  11
  12 namespace content {
  13
  14 // Provides an interface to retrieve ambient light data from MacBooks.
  15 class AmbientLightSensor {
  16  public:
  17   // Create AmbientLightSensor object, return NULL if no valid is sensor found.
  18   static scoped_ptr<AmbientLightSensor> Create();
  19
  20   ~AmbientLightSensor();
  21
  22   // Retrieve lux values from Ambient Light Sensor.
  23   bool ReadSensorValue(uint64_t lux_value[2]);
  24
  25  private:
  26   AmbientLightSensor();
  27
  28   // Probe the local hardware looking for Ambient Light sensor and
  29   // initialize an I/O connection to it.
  30   bool Init();
  31
  32   // IOKit connection to the local sensor.
  33   io_connect_t io_connection_;
  34
  35   DISALLOW_COPY_AND_ASSIGN(AmbientLightSensor);
  36 };
  37
  38 }  // namespace content
  39
  40 #endif  // CONTENT_BROWSER_DEVICE_SENSORS_AMBIENT_LIGHT_MAC_H_