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Added SensorManager.getMinDelay()

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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
This commit is contained in:
Mathias Agopian 2010-07-29 16:51:38 -07:00
parent 27065359e3
commit a48bcf62b6
4 changed files with 15 additions and 5 deletions
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2
include/gui/Sensor.h
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@ -63,6 +63,7 @@ public:
float getMaxValue() const; float getMaxValue() const;
float getResolution() const; float getResolution() const;
float getPowerUsage() const; float getPowerUsage() const;
int32_t getMinDelay() const;
// Flattenable interface // Flattenable interface
virtual size_t getFlattenedSize() const; virtual size_t getFlattenedSize() const;
@ -81,6 +82,7 @@ private:
float mMaxValue; float mMaxValue;
float mResolution; float mResolution;
float mPower; float mPower;
int32_t mMinDelay;
}; };
// ---------------------------------------------------------------------------- // ----------------------------------------------------------------------------

2
include/gui/SensorEventQueue.h
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@ -65,7 +65,7 @@ public:
status_t setEventRate(Sensor const* sensor, nsecs_t ns) const; status_t setEventRate(Sensor const* sensor, nsecs_t ns) const;
// these are here only to support SensorManager.java // these are here only to support SensorManager.java
status_t enableSensor(int32_t handle, int32_t ms) const; status_t enableSensor(int32_t handle, int32_t us) const;
status_t disableSensor(int32_t handle) const; status_t disableSensor(int32_t handle) const;
private: private:

12
libs/gui/Sensor.cpp
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@ -32,7 +32,7 @@ namespace android {
Sensor::Sensor() Sensor::Sensor()
: mHandle(0), mType(0), : mHandle(0), mType(0),
mMinValue(0), mMaxValue(0), mResolution(0), mMinValue(0), mMaxValue(0), mResolution(0),
mPower(0) mPower(0), mMinDelay(0)
{ {
} }
@ -46,6 +46,7 @@ Sensor::Sensor(struct sensor_t const* hwSensor)
mMaxValue = hwSensor->maxRange; // FIXME: maxValue mMaxValue = hwSensor->maxRange; // FIXME: maxValue
mResolution = hwSensor->resolution; mResolution = hwSensor->resolution;
mPower = hwSensor->power; mPower = hwSensor->power;
mMinDelay = hwSensor->minDelay;
} }
Sensor::~Sensor() Sensor::~Sensor()
@ -84,12 +85,17 @@ float Sensor::getPowerUsage() const {
return mPower; return mPower;
} }
int32_t Sensor::getMinDelay() const {
return mMinDelay;
}
size_t Sensor::getFlattenedSize() const size_t Sensor::getFlattenedSize() const
{ {
return sizeof(int32_t) + ((mName.length() + 3) & ~3) + return sizeof(int32_t) + ((mName.length() + 3) & ~3) +
sizeof(int32_t) + ((mVendor.length() + 3) & ~3) + sizeof(int32_t) + ((mVendor.length() + 3) & ~3) +
sizeof(int32_t) * 2 + sizeof(int32_t) * 2 +
sizeof(float) * 4; sizeof(float) * 4 +
sizeof(int32_t);
} }
size_t Sensor::getFdCount() const size_t Sensor::getFdCount() const
@ -132,6 +138,7 @@ status_t Sensor::flatten(void* buffer, size_t size,
offset += write(buffer, offset, mMaxValue); offset += write(buffer, offset, mMaxValue);
offset += write(buffer, offset, mResolution); offset += write(buffer, offset, mResolution);
offset += write(buffer, offset, mPower); offset += write(buffer, offset, mPower);
offset += write(buffer, offset, mMinDelay);
return NO_ERROR; return NO_ERROR;
} }
@ -169,6 +176,7 @@ status_t Sensor::unflatten(void const* buffer, size_t size,
offset += read(buffer, offset, &mMaxValue); offset += read(buffer, offset, &mMaxValue);
offset += read(buffer, offset, &mResolution); offset += read(buffer, offset, &mResolution);
offset += read(buffer, offset, &mPower); offset += read(buffer, offset, &mPower);
offset += read(buffer, offset, &mMinDelay);
return NO_ERROR; return NO_ERROR;
} }

4
libs/gui/SensorEventQueue.cpp
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@ -114,10 +114,10 @@ status_t SensorEventQueue::disableSensor(Sensor const* sensor) const {
return mSensorEventConnection->enableDisable(sensor->getHandle(), false); 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); status_t err = mSensorEventConnection->enableDisable(handle, true);
if (err == NO_ERROR) { if (err == NO_ERROR) {
mSensorEventConnection->setEventRate(handle, ms2ns(ms)); mSensorEventConnection->setEventRate(handle, us2ns(us));
} }
return err; return err;
} }