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 |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7256cfb4bb72491b2f84823a0a38f1399fdfc6bf |
--- /dev/null |
+++ b/device/generic_sensor/platform_sensor_ambient_light_mac.cc |
@@ -0,0 +1,127 @@ |
+// 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 <IOKit/IOMessage.h> |
+ |
+#include "base/bind.h" |
+#include "device/base/synchronization/shared_memory_seqlock_buffer.h" |
+#include "device/generic_sensor/platform_sensor_provider_mac.h" |
+#include "device/sensors/public/cpp/device_sensors_consts.h" |
+#include "device/sensors/public/cpp/device_util_mac.h" |
+ |
+namespace device { |
+ |
+enum LmuFunctionIndex { |
+ kGetSensorReadingID = 0, // getSensorReading(int *, int *) |
+}; |
+ |
+PlatformSensorAmbientLightMac::PlatformSensorAmbientLightMac( |
+ mojom::SensorType type, |
+ mojo::ScopedSharedBufferMapping mapping, |
+ PlatformSensorProvider* provider) |
+ : PlatformSensor(type, std::move(mapping), provider), |
+ light_sensor_port_(nullptr), |
+ current_lux_(0.0) { |
+ DCHECK_EQ(type, mojom::SensorType::AMBIENT_LIGHT); |
+} |
+ |
+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); |
+ uint32_t scalar_output_count = 2; |
+ uint64_t lux_values[2]; |
+ kern_return_t kr = IOConnectCallMethod( |
+ sensor->light_sensor_object_, LmuFunctionIndex::kGetSensorReadingID, |
+ nullptr, 0, nullptr, 0, lux_values, &scalar_output_count, nullptr, 0); |
+ |
+ if (kr == KERN_SUCCESS) |
+ sensor->UpdateReading(lux_values); |
+} |
+ |
+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 = IOServiceOpen(light_sensor_service_, mach_task_self(), 0, |
+ light_sensor_object_.InitializeInto()); |
+ |
+ return kr == KERN_SUCCESS; |
+} |
+ |
+void PlatformSensorAmbientLightMac::StopSensor() { |
+ light_sensor_port_.reset(); |
+ light_sensor_notification_.reset(); |
+ light_sensor_object_.reset(); |
+ current_lux_ = 0.0; |
+} |
+ |
+void PlatformSensorAmbientLightMac::UpdateReading(uint64_t lux_values[2]) { |
+ uint64_t mean = (lux_values[0] + lux_values[1]) / 2; |
+ double lux = LMUvalueToLux(mean); |
+ if (lux == current_lux_) |
+ return; |
+ current_lux_ = lux; |
+ |
+ SensorReading reading; |
+ reading.timestamp = (base::TimeTicks::Now() - base::TimeTicks()).InSecondsF(); |
+ reading.values[0] = current_lux_; |
+ UpdateSensorReading(reading, true); |
+} |
+ |
+} // namespace device |