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

device/generic_sensor/platform_sensor_reader_win.cc

Index: device/generic_sensor/platform_sensor_reader_win.cc
diff --git a/device/generic_sensor/platform_sensor_reader_win.cc b/device/generic_sensor/platform_sensor_reader_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d158b99f33c1050101f85dd249382b6e1b795475
--- /dev/null
+++ b/device/generic_sensor/platform_sensor_reader_win.cc
@@ -0,0 +1,472 @@
+// 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_reader_win.h"
+
+#include <Sensors.h>
+#include <objbase.h>
+
+#include "base/callback.h"
+#include "base/memory/ptr_util.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "base/time/time.h"
+#include "base/win/iunknown_impl.h"
+#include "base/win/scoped_propvariant.h"
+#include "device/generic_sensor/generic_sensor_consts.h"
+#include "device/generic_sensor/public/cpp/platform_sensor_configuration.h"
+#include "device/generic_sensor/public/cpp/sensor_reading.h"
+
+namespace device {
+
+// Init params for the PlatformSensorReaderWin.
+struct ReaderInitParams {
+  // ISensorDataReport::GetSensorValue is not const, therefore, report
+  // cannot be passed as const ref.
+  // ISensorDataReport* report - report that contains new sensor data.
+  // SensorReading* reading    - out parameter that must be populated.
+  // Returns HRESULT           - S_OK on success, otherwise error code.
+  using ReaderFunctor = base::Callback<HRESULT(ISensorDataReport* report,
+                                               SensorReading* reading)>;
+  SENSOR_TYPE_ID sensor_type_id;
+  ReaderFunctor reader_func;
+  unsigned long min_reporting_interval_ms = 0;
+};
+
+namespace {
+
+// Gets value from  the report for provided key.
+bool GetReadingValueForProperty(REFPROPERTYKEY key,
+                                ISensorDataReport* report,
+                                double* value) {
+  DCHECK(value);
+  base::win::ScopedPropVariant variant_value;
+  if (SUCCEEDED(report->GetSensorValue(key, variant_value.Receive()))) {
+    if (variant_value.get().vt == VT_R8)
+      *value = variant_value.get().dblVal;
+    else if (variant_value.get().vt == VT_R4)
+      *value = variant_value.get().fltVal;
+    else
+      return false;
+    return true;
+  }
+
+  *value = 0;
+  return false;
+}
+
+// Ambient light sensor reader initialization parameters.
+std::unique_ptr<ReaderInitParams> CreateAmbientLightReaderInitParams() {
+  auto params = base::MakeUnique<ReaderInitParams>();
+  params->sensor_type_id = SENSOR_TYPE_AMBIENT_LIGHT;
+  params->reader_func =
+      base::Bind([](ISensorDataReport* report, SensorReading* reading) {
+        double lux = 0.0;
+        if (!GetReadingValueForProperty(SENSOR_DATA_TYPE_LIGHT_LEVEL_LUX,
+                                        report, &lux)) {
+          return E_FAIL;
+        }
+        reading->values[0] = lux;
+        return S_OK;
+      });
+  return params;
+}
+
+// Accelerometer sensor reader initialization parameters.
+std::unique_ptr<ReaderInitParams> CreateAccelerometerReaderInitParams() {
+  auto params = base::MakeUnique<ReaderInitParams>();
+  params->sensor_type_id = SENSOR_TYPE_ACCELEROMETER_3D;
+  params->reader_func =
+      base::Bind([](ISensorDataReport* report, SensorReading* reading) {
+        double x = 0.0;
+        double y = 0.0;
+        double z = 0.0;
+        if (!GetReadingValueForProperty(SENSOR_DATA_TYPE_ACCELERATION_X_G,
+                                        report, &x) ||
+            !GetReadingValueForProperty(SENSOR_DATA_TYPE_ACCELERATION_Y_G,
+                                        report, &y) ||
+            !GetReadingValueForProperty(SENSOR_DATA_TYPE_ACCELERATION_Z_G,
+                                        report, &z)) {
+          return E_FAIL;
+        }
+
+        // Windows uses coordinate system where Z axis points down from device
+        // screen, therefore, using right hand notation, we have to reverse
+        // sign for each axis. Values are converted from G/s^2 to m/s^2.
+        reading->values[0] = -x * kMeanGravity;
+        reading->values[1] = -y * kMeanGravity;
+        reading->values[2] = -z * kMeanGravity;
+        return S_OK;
+      });
+  return params;
+}
+
+// Gyroscope sensor reader initialization parameters.
+std::unique_ptr<ReaderInitParams> CreateGyroscopeReaderInitParams() {
+  auto params = base::MakeUnique<ReaderInitParams>();
+  params->sensor_type_id = SENSOR_TYPE_GYROMETER_3D;
+  params->reader_func = base::Bind([](ISensorDataReport* report,
+                                      SensorReading* reading) {
+    double x = 0.0;
+    double y = 0.0;
+    double z = 0.0;
+    if (!GetReadingValueForProperty(
+            SENSOR_DATA_TYPE_ANGULAR_VELOCITY_X_DEGREES_PER_SECOND, report,
+            &x) ||
+        !GetReadingValueForProperty(
+            SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Y_DEGREES_PER_SECOND, report,
+            &y) ||
+        !GetReadingValueForProperty(
+            SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Z_DEGREES_PER_SECOND, report,
+            &z)) {
+      return E_FAIL;
+    }
+
+    // Windows uses coordinate system where Z axis points down from device
+    // screen, therefore, using right hand notation, we have to reverse
+    // sign for each axis. Values are converted from deg to rad.
+    reading->values[0] = -x * kRadiansInDegrees;
+    reading->values[1] = -y * kRadiansInDegrees;
+    reading->values[2] = -z * kRadiansInDegrees;
+    return S_OK;
+  });
+  return params;
+}
+
+// Magnetometer sensor reader initialization parameters.
+std::unique_ptr<ReaderInitParams> CreateMagnetometerReaderInitParams() {
+  auto params = base::MakeUnique<ReaderInitParams>();
+  params->sensor_type_id = SENSOR_TYPE_COMPASS_3D;
+  params->reader_func =
+      base::Bind([](ISensorDataReport* report, SensorReading* reading) {
+        double x = 0.0;
+        double y = 0.0;
+        double z = 0.0;
+        if (!GetReadingValueForProperty(
+                SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_X_MILLIGAUSS, report,
+                &x) ||
+            !GetReadingValueForProperty(
+                SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_Y_MILLIGAUSS, report,
+                &y) ||
+            !GetReadingValueForProperty(
+                SENSOR_DATA_TYPE_MAGNETIC_FIELD_STRENGTH_Z_MILLIGAUSS, report,
+                &z)) {
+          return E_FAIL;
+        }
+
+        // Windows uses coordinate system where Z axis points down from device
+        // screen, therefore, using right hand notation, we have to reverse
+        // sign for each axis. Values are converted from Milligaus to
+        // Microtesla.
+        reading->values[0] = -x * kMicroteslaInMilligauss;
+        reading->values[1] = -y * kMicroteslaInMilligauss;
+        reading->values[2] = -z * kMicroteslaInMilligauss;
+        return S_OK;
+      });
+  return params;
+}
+
+// AbsoluteOrientation sensor reader initialization parameters.
+std::unique_ptr<ReaderInitParams> CreateAbsoluteOrientationReaderInitParams() {
+  auto params = base::MakeUnique<ReaderInitParams>();
+  params->sensor_type_id = SENSOR_TYPE_AGGREGATED_DEVICE_ORIENTATION;
+  params->reader_func =
+      base::Bind([](ISensorDataReport* report, SensorReading* reading) {
+        base::win::ScopedPropVariant quat_variant;
+        HRESULT hr = report->GetSensorValue(SENSOR_DATA_TYPE_QUATERNION,
+                                            quat_variant.Receive());
+        if (FAILED(hr) || quat_variant.get().vt != (VT_VECTOR | VT_UI1) ||
+            quat_variant.get().caub.cElems < 16) {
+          return E_FAIL;
+        }
+
+        float* quat = reinterpret_cast<float*>(quat_variant.get().caub.pElems);
+
+        // Windows uses coordinate system where Z axis points down from device
+        // screen, therefore, using right hand notation, we have to reverse
+        // sign for each quaternion component.
+        reading->values[0] = -quat[0];  // x*sin(Theta/2)
+        reading->values[1] = -quat[1];  // y*sin(Theta/2)
+        reading->values[2] = -quat[2];  // z*sin(Theta/2)
+        reading->values[3] = quat[3];   // cos(Theta/2)
+        return S_OK;
+      });
+  return params;
+}
+
+// Creates ReaderInitParams params structure. To implement support for new
+// sensor types, new switch case should be added and appropriate fields must
+// be set:
+// sensor_type_id - GUID of the sensor supported by Windows.
+// reader_func    - Functor that is responsible to populate SensorReading from
+//                  ISensorDataReport data.
+std::unique_ptr<ReaderInitParams> CreateReaderInitParamsForSensor(
+    mojom::SensorType type) {
+  switch (type) {
+    case mojom::SensorType::AMBIENT_LIGHT:
+      return CreateAmbientLightReaderInitParams();
+    case mojom::SensorType::ACCELEROMETER:
+      return CreateAccelerometerReaderInitParams();
+    case mojom::SensorType::GYROSCOPE:
+      return CreateGyroscopeReaderInitParams();
+    case mojom::SensorType::MAGNETOMETER:
+      return CreateMagnetometerReaderInitParams();
+    case mojom::SensorType::ABSOLUTE_ORIENTATION:
+      return CreateAbsoluteOrientationReaderInitParams();
+    default:
+      NOTIMPLEMENTED();
+      return nullptr;
+  }
+}
+
+}  // namespace
+
+// Class that implements ISensorEvents and IUnknown interfaces and used
+// by ISensor interface to dispatch state and data change events.
+class EventListener : public ISensorEvents, public base::win::IUnknownImpl {
+ public:
+  explicit EventListener(PlatformSensorReaderWin* platform_sensor_reader)
+      : platform_sensor_reader_(platform_sensor_reader) {
+    DCHECK(platform_sensor_reader_);
+  }
+
+  // IUnknown interface
+  ULONG STDMETHODCALLTYPE AddRef() override { return IUnknownImpl::AddRef(); }
+  ULONG STDMETHODCALLTYPE Release() override { return IUnknownImpl::Release(); }
+
+  STDMETHODIMP QueryInterface(REFIID riid, void** ppv) override {
+    if (riid == __uuidof(ISensorEvents)) {
+      *ppv = static_cast<ISensorEvents*>(this);
+      AddRef();
+      return S_OK;
+    }
+    return IUnknownImpl::QueryInterface(riid, ppv);
+  }
+
+ protected:
+  ~EventListener() override = default;
+
+  // ISensorEvents interface
+  STDMETHODIMP OnEvent(ISensor*, REFGUID, IPortableDeviceValues*) override {
+    return S_OK;
+  }
+
+  STDMETHODIMP OnLeave(REFSENSOR_ID sensor_id) override {
+    // If event listener is active and sensor is disconnected, notify client
+    // about the error.
+    platform_sensor_reader_->SensorError();
+    platform_sensor_reader_->StopSensor();
+    return S_OK;
+  }
+
+  STDMETHODIMP OnStateChanged(ISensor* sensor, SensorState state) override {
+    if (sensor == nullptr)
+      return E_INVALIDARG;
+
+    if (state != SensorState::SENSOR_STATE_READY &&
+        state != SensorState::SENSOR_STATE_INITIALIZING) {
+      platform_sensor_reader_->SensorError();
+      platform_sensor_reader_->StopSensor();
+    }
+    return S_OK;
+  }
+
+  STDMETHODIMP OnDataUpdated(ISensor* sensor,
+                             ISensorDataReport* report) override {
+    if (sensor == nullptr || report == nullptr)
+      return E_INVALIDARG;
+
+    // To get precise timestamp, we need to get delta between timestamp
+    // provided in the report and current system time. Then the delta in
+    // milliseconds is substracted from current high resolution timestamp.
+    SYSTEMTIME report_time;
+    HRESULT hr = report->GetTimestamp(&report_time);
+    if (FAILED(hr))
+      return hr;
+
+    base::TimeTicks ticks_now = base::TimeTicks::Now();
+    base::Time time_now = base::Time::NowFromSystemTime();
+
+    base::Time::Exploded exploded;
+    exploded.year = report_time.wYear;
+    exploded.month = report_time.wMonth;
+    exploded.day_of_week = report_time.wDayOfWeek;
+    exploded.day_of_month = report_time.wDay;
+    exploded.hour = report_time.wHour;
+    exploded.minute = report_time.wMinute;
+    exploded.second = report_time.wSecond;
+    exploded.millisecond = report_time.wMilliseconds;
+
+    base::Time timestamp;
+    if (!base::Time::FromUTCExploded(exploded, &timestamp))
+      return E_FAIL;
+
+    base::TimeDelta delta = time_now - timestamp;
+
+    SensorReading reading;
+    reading.timestamp = ((ticks_now - delta) - base::TimeTicks()).InSecondsF();
+
+    // Discard update events that have non-monotonically increasing timestamp.
+    if (last_sensor_reading_.timestamp > reading.timestamp)
+      return E_FAIL;
+
+    hr = platform_sensor_reader_->SensorReadingChanged(report, &reading);
+    if (SUCCEEDED(hr))
+      last_sensor_reading_ = reading;
+    return hr;
+  }
+
+ private:
+  PlatformSensorReaderWin* const platform_sensor_reader_;
+  SensorReading last_sensor_reading_;
+
+  DISALLOW_COPY_AND_ASSIGN(EventListener);
+};
+
+// static
+std::unique_ptr<PlatformSensorReaderWin> PlatformSensorReaderWin::Create(
+    mojom::SensorType type,
+    base::win::ScopedComPtr<ISensorManager> sensor_manager) {
+  DCHECK(sensor_manager);
+
+  auto params = CreateReaderInitParamsForSensor(type);
+  if (!params)
+    return nullptr;
+
+  auto sensor = GetSensorForType(params->sensor_type_id, sensor_manager);
+  if (!sensor)
+    return nullptr;
+
+  base::win::ScopedPropVariant min_interval;
+  HRESULT hr = sensor->GetProperty(SENSOR_PROPERTY_MIN_REPORT_INTERVAL,
+                                   min_interval.Receive());
+  if (SUCCEEDED(hr) && min_interval.get().vt == VT_UI4)
+    params->min_reporting_interval_ms = min_interval.get().ulVal;
+
+  GUID interests[] = {SENSOR_EVENT_STATE_CHANGED, SENSOR_EVENT_DATA_UPDATED};
+  hr = sensor->SetEventInterest(interests, arraysize(interests));
+  if (FAILED(hr))
+    return nullptr;
+
+  return base::WrapUnique(
+      new PlatformSensorReaderWin(sensor, std::move(params)));
+}
+
+// static
+base::win::ScopedComPtr<ISensor> PlatformSensorReaderWin::GetSensorForType(
+    REFSENSOR_TYPE_ID sensor_type,
+    base::win::ScopedComPtr<ISensorManager> sensor_manager) {
+  base::win::ScopedComPtr<ISensor> sensor;
+  base::win::ScopedComPtr<ISensorCollection> sensor_collection;
+  HRESULT hr = sensor_manager->GetSensorsByType(
+      sensor_type, sensor_collection.GetAddressOf());
+  if (FAILED(hr) || !sensor_collection)
+    return sensor;
+
+  ULONG count = 0;
+  hr = sensor_collection->GetCount(&count);
+  if (SUCCEEDED(hr) && count > 0)
+    sensor_collection->GetAt(0, sensor.GetAddressOf());
+  return sensor;
+}
+
+PlatformSensorReaderWin::PlatformSensorReaderWin(
+    base::win::ScopedComPtr<ISensor> sensor,
+    std::unique_ptr<ReaderInitParams> params)
+    : init_params_(std::move(params)),
+      task_runner_(base::ThreadTaskRunnerHandle::Get()),
+      sensor_active_(false),
+      client_(nullptr),
+      sensor_(sensor),
+      event_listener_(new EventListener(this)),
+      weak_factory_(this) {
+  DCHECK(init_params_);
+  DCHECK(!init_params_->reader_func.is_null());
+  DCHECK(sensor_);
+}
+
+void PlatformSensorReaderWin::SetClient(Client* client) {
+  base::AutoLock autolock(lock_);
+  // Can be null.
+  client_ = client;
+}
+
+void PlatformSensorReaderWin::StopSensor() {
+  base::AutoLock autolock(lock_);
+  if (sensor_active_) {
+    sensor_->SetEventSink(nullptr);
+    sensor_active_ = false;
+  }
+}
+
+PlatformSensorReaderWin::~PlatformSensorReaderWin() {
+  DCHECK(task_runner_->BelongsToCurrentThread());
+}
+
+bool PlatformSensorReaderWin::StartSensor(
+    const PlatformSensorConfiguration& configuration) {
+  base::AutoLock autolock(lock_);
+
+  if (!SetReportingInterval(configuration))
+    return false;
+
+  if (!sensor_active_) {
+    task_runner_->PostTask(
+        FROM_HERE, base::Bind(&PlatformSensorReaderWin::ListenSensorEvent,
+                              weak_factory_.GetWeakPtr()));
+    sensor_active_ = true;
+  }
+
+  return true;
+}
+
+void PlatformSensorReaderWin::ListenSensorEvent() {
+  // Set event listener.
+  if (FAILED(sensor_->SetEventSink(event_listener_.get()))) {
+    SensorError();
+    StopSensor();
+  }
+}
+
+bool PlatformSensorReaderWin::SetReportingInterval(
+    const PlatformSensorConfiguration& configuration) {
+  base::win::ScopedComPtr<IPortableDeviceValues> props;
+  if (SUCCEEDED(::CoCreateInstance(CLSID_PortableDeviceValues, nullptr,
+                                   CLSCTX_ALL, IID_PPV_ARGS(&props)))) {
+    unsigned interval =
+        (1 / configuration.frequency()) * base::Time::kMillisecondsPerSecond;
+
+    HRESULT hr = props->SetUnsignedIntegerValue(
+        SENSOR_PROPERTY_CURRENT_REPORT_INTERVAL, interval);
+
+    if (SUCCEEDED(hr)) {
+      base::win::ScopedComPtr<IPortableDeviceValues> return_props;
+      hr = sensor_->SetProperties(props.Get(), return_props.GetAddressOf());
+      return SUCCEEDED(hr);
+    }
+  }
+  return false;
+}
+
+HRESULT PlatformSensorReaderWin::SensorReadingChanged(
+    ISensorDataReport* report,
+    SensorReading* reading) const {
+  if (!client_)
+    return E_FAIL;
+
+  HRESULT hr = init_params_->reader_func.Run(report, reading);
+  if (SUCCEEDED(hr))
+    client_->OnReadingUpdated(*reading);
+  return hr;
+}
+
+void PlatformSensorReaderWin::SensorError() {
+  if (client_)
+    client_->OnSensorError();
+}
+
+unsigned long PlatformSensorReaderWin::GetMinimalReportingIntervalMs() const {
+  return init_params_->min_reporting_interval_ms;
+}
+
+}  // namespace device