113 lines
4.7 KiB
C++
113 lines
4.7 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_SENSOR_DEVICE_H
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#define ANDROID_SENSOR_DEVICE_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/KeyedVector.h>
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#include <utils/Singleton.h>
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#include <utils/String8.h>
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#include <gui/Sensor.h>
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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class SensorDevice : public Singleton<SensorDevice> {
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friend class Singleton<SensorDevice>;
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sensors_poll_device_1_t* mSensorDevice;
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struct sensors_module_t* mSensorModule;
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static const nsecs_t MINIMUM_EVENTS_PERIOD = 1000000; // 1000 Hz
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mutable Mutex mLock; // protect mActivationCount[].batchParams
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// fixed-size array after construction
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// Struct to store all the parameters(samplingPeriod, maxBatchReportLatency and flags) from
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// batch call. For continous mode clients, maxBatchReportLatency is set to zero.
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struct BatchParams {
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// TODO: Get rid of flags parameter everywhere.
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int flags;
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nsecs_t batchDelay, batchTimeout;
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BatchParams() : flags(0), batchDelay(0), batchTimeout(0) {}
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BatchParams(int flag, nsecs_t delay, nsecs_t timeout): flags(flag), batchDelay(delay),
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batchTimeout(timeout) { }
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bool operator != (const BatchParams& other) {
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return other.batchDelay != batchDelay || other.batchTimeout != batchTimeout ||
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other.flags != flags;
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}
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};
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// Store batch parameters in the KeyedVector and the optimal batch_rate and timeout in
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// bestBatchParams. For every batch() call corresponding params are stored in batchParams
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// vector. A continuous mode request is batch(... timeout=0 ..) followed by activate(). A batch
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// mode request is batch(... timeout > 0 ...) followed by activate().
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// Info is a per-sensor data structure which contains the batch parameters for each client that
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// has registered for this sensor.
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struct Info {
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BatchParams bestBatchParams;
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// Key is the unique identifier(ident) for each client, value is the batch parameters
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// requested by the client.
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KeyedVector<void*, BatchParams> batchParams;
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Info() : bestBatchParams(0, -1, -1) {}
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// Sets batch parameters for this ident. Returns error if this ident is not already present
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// in the KeyedVector above.
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status_t setBatchParamsForIdent(void* ident, int flags, int64_t samplingPeriodNs,
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int64_t maxBatchReportLatencyNs);
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// Finds the optimal parameters for batching and stores them in bestBatchParams variable.
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void selectBatchParams();
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// Removes batchParams for an ident and re-computes bestBatchParams. Returns the index of
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// the removed ident. If index >=0, ident is present and successfully removed.
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ssize_t removeBatchParamsForIdent(void* ident);
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int numActiveClients();
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};
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DefaultKeyedVector<int, Info> mActivationCount;
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// Use this vector to determine which client is activated or deactivated.
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SortedVector<void *> mDisabledClients;
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SensorDevice();
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bool isClientDisabled(void* ident);
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bool isClientDisabledLocked(void* ident);
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public:
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ssize_t getSensorList(sensor_t const** list);
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status_t initCheck() const;
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int getHalDeviceVersion() const;
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ssize_t poll(sensors_event_t* buffer, size_t count);
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status_t activate(void* ident, int handle, int enabled);
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status_t batch(void* ident, int handle, int flags, int64_t samplingPeriodNs,
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int64_t maxBatchReportLatencyNs);
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// Call batch with timeout zero instead of calling setDelay() for newer devices.
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status_t setDelay(void* ident, int handle, int64_t ns);
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status_t flush(void* ident, int handle);
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status_t setMode(uint32_t mode);
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void disableAllSensors();
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void enableAllSensors();
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void autoDisable(void *ident, int handle);
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status_t injectSensorData(const sensors_event_t *event);
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void dump(String8& result);
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};
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// ---------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_SENSOR_DEVICE_H
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