Move //device/generic_sensor to be part of the internal implementation of the Device Service.

device/generic_sensor/platform_sensor_ambient_light_mac.cc

Index: device/generic_sensor/platform_sensor_ambient_light_mac.cc
diff --git a/device/generic_sensor/platform_sensor_ambient_light_mac.cc b/device/generic_sensor/platform_sensor_ambient_light_mac.cc
deleted file mode 100644
index 8a72acf7d6d6108614916bc20c3fc7be626f956e..0000000000000000000000000000000000000000
--- a/device/generic_sensor/platform_sensor_ambient_light_mac.cc
+++ /dev/null
@@ -1,175 +0,0 @@
-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "device/generic_sensor/platform_sensor_ambient_light_mac.h"
-
-#include <stdint.h>
-
-#include <IOKit/IOMessage.h>
-
-#include "base/bind.h"
-#include "device/base/synchronization/shared_memory_seqlock_buffer.h"
-#include "device/generic_sensor/generic_sensor_consts.h"
-#include "device/generic_sensor/platform_sensor_provider_mac.h"
-
-namespace {
-
-// Convert the value returned by the ambient light LMU sensor on Mac
-// hardware to a lux value.
-double LMUvalueToLux(uint64_t raw_value) {
-  // Conversion formula from regression.
-  // https://bugzilla.mozilla.org/show_bug.cgi?id=793728
-  // Let x = raw_value, then
-  // lux = -2.978303814*(10^-27)*x^4 + 2.635687683*(10^-19)*x^3 -
-  //       3.459747434*(10^-12)*x^2 + 3.905829689*(10^-5)*x - 0.1932594532
-
-  static const long double k4 = pow(10.L, -7);
-  static const long double k3 = pow(10.L, -4);
-  static const long double k2 = pow(10.L, -2);
-  static const long double k1 = pow(10.L, 5);
-  long double scaled_value = raw_value / k1;
-
-  long double lux_value =
-      (-3 * k4 * pow(scaled_value, 4)) + (2.6 * k3 * pow(scaled_value, 3)) +
-      (-3.4 * k2 * pow(scaled_value, 2)) + (3.9 * scaled_value) - 0.19;
-
-  double lux = ceil(static_cast<double>(lux_value));
-  return lux > 0 ? lux : 0;
-}
-
-}  // namespace
-
-namespace device {
-
-enum LmuFunctionIndex {
-  kGetSensorReadingID = 0,  // getSensorReading(int *, int *)
-};
-
-PlatformSensorAmbientLightMac::PlatformSensorAmbientLightMac(
-    mojo::ScopedSharedBufferMapping mapping,
-    PlatformSensorProvider* provider)
-    : PlatformSensor(mojom::SensorType::AMBIENT_LIGHT,
-                     std::move(mapping),
-                     provider),
-      light_sensor_port_(nullptr),
-      current_lux_(0.0) {}
-
-PlatformSensorAmbientLightMac::~PlatformSensorAmbientLightMac() = default;
-
-mojom::ReportingMode PlatformSensorAmbientLightMac::GetReportingMode() {
-  return mojom::ReportingMode::ON_CHANGE;
-}
-
-bool PlatformSensorAmbientLightMac::CheckSensorConfiguration(
-    const PlatformSensorConfiguration& configuration) {
-  return configuration.frequency() > 0 &&
-         configuration.frequency() <=
-             mojom::SensorConfiguration::kMaxAllowedFrequency;
-}
-
-PlatformSensorConfiguration
-PlatformSensorAmbientLightMac::GetDefaultConfiguration() {
-  PlatformSensorConfiguration default_configuration;
-  default_configuration.set_frequency(kDefaultAmbientLightFrequencyHz);
-  return default_configuration;
-}
-
-void PlatformSensorAmbientLightMac::IOServiceCallback(void* context,
-                                                      io_service_t service,
-                                                      natural_t message_type,
-                                                      void* message_argument) {
-  PlatformSensorAmbientLightMac* sensor =
-      static_cast<PlatformSensorAmbientLightMac*>(context);
-  if (!sensor->ReadAndUpdate()) {
-    sensor->NotifySensorError();
-    sensor->StopSensor();
-  }
-}
-
-bool PlatformSensorAmbientLightMac::StartSensor(
-    const PlatformSensorConfiguration& configuration) {
-  // Tested and verified by riju that the following call works on
-  // MacBookPro9,1 : Macbook Pro 15" (Mid 2012 model)
-  // MacBookPro10,1 : Macbook Pro 15" (Retina Display, Early 2013 model).
-  // MacBookPro10,2 : Macbook Pro 13" (Retina Display, Early 2013 model).
-  // MacBookAir5,2 : Macbook Air 13" (Mid 2012 model) (by François Beaufort).
-  // MacBookAir6,2 : Macbook Air 13" (Mid 2013 model).
-  // Testing plans : please download the code and follow the comments :-
-  // https://gist.github.com/riju/74af8c81a665e412d122/
-  // and add an entry here about the model and the status returned by the code.
-
-  // Look up a registered IOService object whose class is AppleLMUController.
-  light_sensor_service_.reset(IOServiceGetMatchingService(
-      kIOMasterPortDefault, IOServiceMatching("AppleLMUController")));
-
-  // Return early if the ambient light sensor is not present.
-  if (!light_sensor_service_)
-    return false;
-
-  light_sensor_port_.reset(IONotificationPortCreate(kIOMasterPortDefault));
-  if (!light_sensor_port_.is_valid())
-    return false;
-
-  IONotificationPortSetDispatchQueue(
-      light_sensor_port_.get(),
-      dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0));
-
-  kern_return_t kr = IOServiceAddInterestNotification(
-      light_sensor_port_.get(), light_sensor_service_, kIOGeneralInterest,
-      IOServiceCallback, this, light_sensor_notification_.InitializeInto());
-  if (kr != KERN_SUCCESS)
-    return false;
-
-  kr = IOServiceAddInterestNotification(
-      light_sensor_port_.get(), light_sensor_service_, kIOBusyInterest,
-      IOServiceCallback, this,
-      light_sensor_busy_notification_.InitializeInto());
-  if (kr != KERN_SUCCESS)
-    return false;
-
-  kr = IOServiceOpen(light_sensor_service_, mach_task_self(), 0,
-                     light_sensor_object_.InitializeInto());
-  if (kr != KERN_SUCCESS)
-    return false;
-
-  bool success = ReadAndUpdate();
-  if (!success)
-    StopSensor();
-
-  return success;
-}
-
-void PlatformSensorAmbientLightMac::StopSensor() {
-  light_sensor_port_.reset();
-  light_sensor_notification_.reset();
-  light_sensor_busy_notification_.reset();
-  light_sensor_object_.reset();
-  light_sensor_service_.reset();
-  current_lux_ = 0.0;
-}
-
-bool PlatformSensorAmbientLightMac::ReadAndUpdate() {
-  uint32_t scalar_output_count = 2;
-  uint64_t lux_values[2];
-  kern_return_t kr = IOConnectCallMethod(
-      light_sensor_object_, LmuFunctionIndex::kGetSensorReadingID, nullptr, 0,
-      nullptr, 0, lux_values, &scalar_output_count, nullptr, 0);
-
-  if (kr != KERN_SUCCESS)
-    return false;
-
-  uint64_t mean = (lux_values[0] + lux_values[1]) / 2;
-  double lux = LMUvalueToLux(mean);
-  if (lux == current_lux_)
-    return true;
-  current_lux_ = lux;
-
-  SensorReading reading;
-  reading.timestamp = (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF();
-  reading.values[0] = current_lux_;
-  UpdateSensorReading(reading, true);
-  return true;
-}
-
-}  // namespace device