commit a48bcf62b6a26f24a0bdd2b44bb39fadce499e92
author Mathias Agopian <mathias@google.com> Thu Jul 29 16:51:38 2010 -0700
committer Mathias Agopian <mathias@google.com> Thu Jul 29 18:18:00 2010 -0700
tree 573eab127b2e6fe0544669f8c2309c44e8593989
parent 27065359e3db4f2a256839107cbe4f64b457ed41

Added SensorManager.getMinDelay()

Exposed the new "min delay" sensor property through native and
java sensor apis. This allows the caller to know what is the
maximum rate at which a sensor can return events, or, if a sensor
works in "update" mode (events returned only when the value changes).

Also augmented SensorManager.regusterSensorEvent() so that it can
accept a value in microsecond in addition to the 4 constants already
defined.

Change-Id: If425e9979892666df8c989d7de3c362230fa19e0

libs/gui/Sensor.cpp

diff --git a/libs/gui/Sensor.cpp b/libs/gui/Sensor.cpp
index cb85df9..b1f37ff 100644
--- a/libs/gui/Sensor.cpp
+++ b/libs/gui/Sensor.cpp
@@ -32,7 +32,7 @@
 Sensor::Sensor()
     : mHandle(0), mType(0),
       mMinValue(0), mMaxValue(0), mResolution(0),
-      mPower(0)
+      mPower(0), mMinDelay(0)
 {
 }
 
@@ -46,6 +46,7 @@
     mMaxValue = hwSensor->maxRange;     // FIXME: maxValue
     mResolution = hwSensor->resolution;
     mPower = hwSensor->power;
+    mMinDelay = hwSensor->minDelay;
 }
 
 Sensor::~Sensor()
@@ -84,12 +85,17 @@
     return mPower;
 }
 
+int32_t Sensor::getMinDelay() const {
+    return mMinDelay;
+}
+
 size_t Sensor::getFlattenedSize() const
 {
     return  sizeof(int32_t) + ((mName.length() + 3) & ~3) +
             sizeof(int32_t) + ((mVendor.length() + 3) & ~3) +
             sizeof(int32_t) * 2 +
-            sizeof(float) * 4;
+            sizeof(float) * 4 +
+            sizeof(int32_t);
 }
 
 size_t Sensor::getFdCount() const
@@ -132,6 +138,7 @@
     offset += write(buffer, offset, mMaxValue);
     offset += write(buffer, offset, mResolution);
     offset += write(buffer, offset, mPower);
+    offset += write(buffer, offset, mMinDelay);
 
     return NO_ERROR;
 }
@@ -169,6 +176,7 @@
     offset += read(buffer, offset, &mMaxValue);
     offset += read(buffer, offset, &mResolution);
     offset += read(buffer, offset, &mPower);
+    offset += read(buffer, offset, &mMinDelay);
 
     return NO_ERROR;
 }

libs/gui/SensorEventQueue.cpp

diff --git a/libs/gui/SensorEventQueue.cpp b/libs/gui/SensorEventQueue.cpp
index 4b46842..3396f25 100644
--- a/libs/gui/SensorEventQueue.cpp
+++ b/libs/gui/SensorEventQueue.cpp
@@ -114,10 +114,10 @@
     return mSensorEventConnection->enableDisable(sensor->getHandle(), false);
 }
 
-status_t SensorEventQueue::enableSensor(int32_t handle, int32_t ms) const {
+status_t SensorEventQueue::enableSensor(int32_t handle, int32_t us) const {
     status_t err = mSensorEventConnection->enableDisable(handle, true);
     if (err == NO_ERROR) {
-        mSensorEventConnection->setEventRate(handle, ms2ns(ms));
+        mSensorEventConnection->setEventRate(handle, us2ns(us));
     }
     return err;
 }