1 files changed, 137 insertions, 0 deletions
diff --git a/hal/cocoa/CocoaSensor.mm b/hal/cocoa/CocoaSensor.mm
new file mode 100644
index 0000000000..96e00369e8
--- /dev/null
+++ b/hal/cocoa/CocoaSensor.mm
@@ -0,0 +1,137 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "Hal.h"
+#include "nsITimer.h"
+#include "smslib.h"
+#include "nsComponentManagerUtils.h"
+
+#include <mach/mach.h>
+#include <cmath>
+#import <IOKit/IOKitLib.h>
+
+#define MEAN_GRAVITY 9.80665
+#define DEFAULT_SENSOR_POLL 100
+using namespace mozilla::hal;
+namespace mozilla {
+namespace hal_impl {
+static nsITimer* sUpdateTimer = nullptr;
+static bool sActiveSensors[NUM_SENSOR_TYPE];
+static io_connect_t sDataPort = IO_OBJECT_NULL;
+static uint64_t sLastMean = -1;
+static float LMUvalueToLux(uint64_t aValue) {
+  // Conversion formula from regression. See Bug 793728.
+  // -3*(10^-27)*x^4 + 2.6*(10^-19)*x^3 + -3.4*(10^-12)*x^2 + 3.9*(10^-5)*x - 0.19
+  long double powerC4 = 1 / pow((long double)10, 27);
+  long double powerC3 = 1 / pow((long double)10, 19);
+  long double powerC2 = 1 / pow((long double)10, 12);
+  long double powerC1 = 1 / pow((long double)10, 5);
+
+  long double term4 = -3.0 * powerC4 * pow(aValue, 4);
+  long double term3 = 2.6 * powerC3 * pow(aValue, 3);
+  long double term2 = -3.4 * powerC2 * pow(aValue, 2);
+  long double term1 = 3.9 * powerC1 * aValue;
+
+  float lux = ceil(static_cast<float>(term4 + term3 + term2 + term1 - 0.19));
+  return lux > 0 ? lux : 0;
+}
+void UpdateHandler(nsITimer* aTimer, void* aClosure) {
+  for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
+    if (!sActiveSensors[i]) {
+      continue;
+    }
+    SensorType sensor = static_cast<SensorType>(i);
+    nsTArray<float> values;
+    if (sensor == SENSOR_ACCELERATION) {
+      sms_acceleration accel;
+      smsGetData(&accel);
+
+      values.AppendElement(accel.x * MEAN_GRAVITY);
+      values.AppendElement(accel.y * MEAN_GRAVITY);
+      values.AppendElement(accel.z * MEAN_GRAVITY);
+    } else if (sensor == SENSOR_LIGHT && sDataPort != IO_OBJECT_NULL) {
+      kern_return_t kr;
+      uint32_t outputs = 2;
+      uint64_t lightLMU[outputs];
+
+      kr = IOConnectCallMethod(sDataPort, 0, nil, 0, nil, 0, lightLMU, &outputs, nil, 0);
+      if (kr == KERN_SUCCESS) {
+        uint64_t mean = (lightLMU[0] + lightLMU[1]) / 2;
+        if (mean == sLastMean) {
+          continue;
+        }
+        sLastMean = mean;
+        values.AppendElement(LMUvalueToLux(mean));
+      } else if (kr == kIOReturnBusy) {
+        continue;
+      }
+    }
+
+    hal::SensorData sdata(sensor, PR_Now(), values);
+    hal::NotifySensorChange(sdata);
+  }
+}
+void EnableSensorNotifications(SensorType aSensor) {
+  if (aSensor == SENSOR_ACCELERATION) {
+    int result = smsStartup(nil, nil);
+
+    if (result != SMS_SUCCESS) {
+      return;
+    }
+
+    if (!smsLoadCalibration()) {
+      return;
+    }
+  } else if (aSensor == SENSOR_LIGHT) {
+    io_service_t serviceObject;
+    serviceObject =
+        IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("AppleLMUController"));
+    if (!serviceObject) {
+      return;
+    }
+    kern_return_t kr;
+    kr = IOServiceOpen(serviceObject, mach_task_self(), 0, &sDataPort);
+    IOObjectRelease(serviceObject);
+    if (kr != KERN_SUCCESS) {
+      return;
+    }
+  } else {
+    NS_WARNING("EnableSensorNotifications called on an unknown sensor type");
+    return;
+  }
+  sActiveSensors[aSensor] = true;
+
+  if (!sUpdateTimer) {
+    CallCreateInstance("@mozilla.org/timer;1", &sUpdateTimer);
+    if (sUpdateTimer) {
+      sUpdateTimer->InitWithNamedFuncCallback(UpdateHandler, nullptr, DEFAULT_SENSOR_POLL,
+                                              nsITimer::TYPE_REPEATING_SLACK,
+                                              "hal_impl::UpdateHandler");
+    }
+  }
+}
+void DisableSensorNotifications(SensorType aSensor) {
+  if (!sActiveSensors[aSensor] || (aSensor != SENSOR_ACCELERATION && aSensor != SENSOR_LIGHT)) {
+    return;
+  }
+
+  sActiveSensors[aSensor] = false;
+
+  if (aSensor == SENSOR_ACCELERATION) {
+    smsShutdown();
+  } else if (aSensor == SENSOR_LIGHT) {
+    IOServiceClose(sDataPort);
+  }
+  // If all sensors are disabled, cancel the update timer.
+  if (sUpdateTimer) {
+    for (int i = 0; i < NUM_SENSOR_TYPE; i++) {
+      if (sActiveSensors[i]) {
+        return;
+      }
+    }
+    sUpdateTimer->Cancel();
+    NS_RELEASE(sUpdateTimer);
+  }
+}
+}  // namespace hal_impl
+}  // namespace mozilla