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* Copyright (C) 2016 The Android Open Source Project
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
package android.hardware.sensors@1.0;
interface ISensors {
* Enumerate all available (static) sensors.
getSensorsList() generates (vec<SensorInfo> list);
* Place the module in a specific mode. The following modes are defined
* SENSOR_HAL_NORMAL_MODE - Normal operation. Default state of the module.
* Data is injected for the supported sensors by the sensor service in
* this mode.
* @return OK on success
* BAD_VALUE if requested mode is not supported
* PERMISSION_DENIED if operation is not allowed
setOperationMode(OperationMode mode) generates (Result result);
* Activate/de-activate one sensor.
* After sensor de-activation, existing sensor events that have not
* been picked up by poll() must be abandoned immediately so that
* subsequent activation will not get stale sensor events (events
* that are generated prior to the latter activation).
* @param sensorHandle is the handle of the sensor to change.
* @param enabled set to true to enable, or false to disable the sensor.
* @return result OK on success, BAD_VALUE if sensorHandle is invalid.
activate(int32_t sensorHandle, bool enabled) generates (Result result);
* Generate a vector of sensor events containing at most "maxCount"
* entries.
* Additionally a vector of SensorInfos is returned for any dynamic sensors
* connected as notified by returned events of type DYNAMIC_SENSOR_META.
* If there is no sensor event when this function is being called, block
* until there are sensor events available.
* @param maxCount max number of samples can be returned, must be > 0.
* Actual number of events returned in data must be <= maxCount
* and > 0.
* @return result OK on success or BAD_VALUE if maxCount <= 0.
* @return data vector of Event contains sensor events.
* @return dynamicSensorsAdded vector of SensorInfo contains dynamic sensor
* added. Each element corresponds to a dynamic sensor meta events
* in data.
poll(int32_t maxCount)
generates (
Result result,
vec<Event> data,
vec<SensorInfo> dynamicSensorsAdded);
* Sets a sensor’s parameters, including sampling frequency and maximum
* report latency. This function can be called while the sensor is
* activated, in which case it must not cause any sensor measurements to
* be lost: transitioning from one sampling rate to the other cannot cause
* lost events, nor can transitioning from a high maximum report latency to
* a low maximum report latency.
* See the Batching sensor results page for details:
* @param sensorHandle handle of sensor to be changed.
* @param samplingPeriodNs specifies sensor sample period in nanoseconds.
* @param maxReportLatencyNs allowed delay time before an event is sampled
* to time of report.
* @return result OK on success, BAD_VALUE if any parameters are invalid.
batch(int32_t sensorHandle,
int64_t samplingPeriodNs,
int64_t maxReportLatencyNs) generates (Result result);
* Trigger a flush of internal FIFO.
* Flush adds a FLUSH_COMPLETE metadata event to the end of the "batch mode"
* FIFO for the specified sensor and flushes the FIFO. If the FIFO is empty
* or if the sensor doesn't support batching (FIFO size zero), return
* SUCCESS and add a trivial FLUSH_COMPLETE event added to the event stream.
* This applies to all sensors other than one-shot sensors. If the sensor
* is a one-shot sensor, flush must return BAD_VALUE and not generate any
* flush complete metadata. If the sensor is not active at the time flush()
* is called, flush() return BAD_VALUE.
* @param sensorHandle handle of sensor to be flushed.
* @return result OK on success and BAD_VALUE if sensorHandle is invalid.
flush(int32_t sensorHandle) generates (Result result);
* Inject a single sensor event or push operation environment parameters to
* device.
* When device is in NORMAL mode, this function is called to push operation
* environment data to device. In this operation, Event is always of
* SensorType::AdditionalInfo type. See operation evironment parameters
* section in AdditionalInfoType.
* When device is in DATA_INJECTION mode, this function is also used for
* injecting sensor events.
* Regardless of OperationMode, injected SensorType::ADDITIONAL_INFO
* type events should not be routed back to poll() function.
* @see AdditionalInfoType
* @see OperationMode
* @param event sensor event to be injected
* @return result OK on success; PERMISSION_DENIED if operation is not
* allowed; INVALID_OPERATION, if this functionality is
* unsupported; BAD_VALUE if sensor event cannot be injected.
injectSensorData(Event event) generates (Result result);
* Register direct report channel.
* Register a direct channel with supplied shared memory information. Upon
* return, the sensor hardware is responsible for resetting the memory
* content to initial value (depending on memory format settings).
* @param mem shared memory info data structure.
* @return result OK on success; BAD_VALUE if shared memory information is
* not consistent; NO_MEMORY if shared memory cannot be used by
* sensor system; INVALID_OPERATION if functionality is not
* supported.
* @return channelHandle a positive integer used for referencing registered
* direct channel (>0) in configureDirectReport and
* unregisterDirectChannel if result is OK, -1 otherwise.
registerDirectChannel(SharedMemInfo mem)
generates (Result result, int32_t channelHandle);
* Unregister direct report channel.
* Unregister a direct channel previously registered using
* registerDirectChannel, and remove all active sensor report configured in
* still active sensor report configured in the direct channel.
* @param channelHandle handle of direct channel to be unregistered.
* @return result OK if direct report is supported; INVALID_OPERATION
* otherwise.
unregisterDirectChannel(int32_t channelHandle) generates (Result result);
* Configure direct sensor event report in direct channel.
* This function start, modify rate or stop direct report of a sensor in a
* certain direct channel.
* @param sensorHandle handle of sensor to be configured. When combined
* with STOP rate, sensorHandle can be -1 to denote all active
* sensors in the direct channel specified by channel Handle.
* @param channelHandle handle of direct channel to be configured.
* @param rate rate level, see RateLevel enum.
* @return result OK on success; BAD_VALUE if parameter is invalid (such as
* rate level is not supported by sensor, channelHandle does not
* exist, etc); INVALID_OPERATION if functionality is not
* supported.
* @return reportToken positive integer to identify multiple sensors of
* the same type in a single direct channel. Ignored if rate is
* STOP. See SharedMemFormat.
int32_t sensorHandle, int32_t channelHandle, RateLevel rate)
generates (Result result, int32_t reportToken);