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299 lines
11 KiB
299 lines
11 KiB
/*
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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 "SensorDeviceUtils.h"
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#include "SensorService.h"
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#include "SensorServiceUtils.h"
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#include "ISensorsWrapper.h"
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#include <fmq/MessageQueue.h>
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#include <sensor/SensorEventQueue.h>
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#include <sensor/Sensor.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 <utils/Timers.h>
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#include <string>
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#include <unordered_map>
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#include <algorithm> //std::max std::min
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#include "RingBuffer.h"
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// ---------------------------------------------------------------------------
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namespace android {
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// ---------------------------------------------------------------------------
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class SensorsHalDeathReceivier : public android::hardware::hidl_death_recipient {
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virtual void serviceDied(uint64_t cookie,
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const wp<::android::hidl::base::V1_0::IBase>& service) override;
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};
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class SensorDevice : public Singleton<SensorDevice>,
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public SensorServiceUtil::Dumpable {
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public:
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class HidlTransportErrorLog {
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public:
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HidlTransportErrorLog() {
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mTs = 0;
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mCount = 0;
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}
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HidlTransportErrorLog(time_t ts, int count) {
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mTs = ts;
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mCount = count;
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}
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String8 toString() const {
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String8 result;
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struct tm *timeInfo = localtime(&mTs);
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result.appendFormat("%02d:%02d:%02d :: %d", timeInfo->tm_hour, timeInfo->tm_min,
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timeInfo->tm_sec, mCount);
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return result;
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}
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private:
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time_t mTs; // timestamp of the error
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int mCount; // number of transport errors observed
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};
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~SensorDevice();
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void prepareForReconnect();
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void reconnect();
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ssize_t getSensorList(sensor_t const** list);
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void handleDynamicSensorConnection(int handle, bool connected);
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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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void writeWakeLockHandled(uint32_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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bool isDirectReportSupported() const;
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int32_t registerDirectChannel(const sensors_direct_mem_t *memory);
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void unregisterDirectChannel(int32_t channelHandle);
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int32_t configureDirectChannel(int32_t sensorHandle,
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int32_t channelHandle, const struct sensors_direct_cfg_t *config);
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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 notifyConnectionDestroyed(void *ident);
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using Result = ::android::hardware::sensors::V1_0::Result;
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hardware::Return<void> onDynamicSensorsConnected(
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const hardware::hidl_vec<hardware::sensors::V2_1::SensorInfo> &dynamicSensorsAdded);
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hardware::Return<void> onDynamicSensorsDisconnected(
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const hardware::hidl_vec<int32_t> &dynamicSensorHandlesRemoved);
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void setUidStateForConnection(void* ident, SensorService::UidState state);
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bool isReconnecting() const {
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return mReconnecting;
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}
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bool isSensorActive(int handle) const;
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// To update the BatchParams of a SensorEventConnection when the mic toggle changes its state
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// while the Sensors Off toggle is on.
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void onMicSensorAccessChanged(void* ident, int handle, nsecs_t samplingPeriodNs);
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// Dumpable
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virtual std::string dump() const override;
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virtual void dump(util::ProtoOutputStream* proto) const override;
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private:
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friend class Singleton<SensorDevice>;
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sp<::android::hardware::sensors::V2_1::implementation::ISensorsWrapperBase> mSensors;
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Vector<sensor_t> mSensorList;
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std::unordered_map<int32_t, sensor_t*> mConnectedDynamicSensors;
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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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nsecs_t mTSample, mTBatch;
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BatchParams() : mTSample(INT64_MAX), mTBatch(INT64_MAX) {}
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BatchParams(nsecs_t tSample, nsecs_t tBatch): mTSample(tSample), mTBatch(tBatch) {}
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bool operator != (const BatchParams& other) {
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return !(mTSample == other.mTSample && mTBatch == other.mTBatch);
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}
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// Merge another parameter with this one. The updated mTSample will be the min of the two.
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// The update mTBatch will be the min of original mTBatch and the apparent batch period
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// of the other. the apparent batch is the maximum of mTBatch and mTSample,
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void merge(const BatchParams &other) {
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mTSample = std::min(mTSample, other.mTSample);
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mTBatch = std::min(mTBatch, std::max(other.mTBatch, other.mTSample));
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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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// Flag to track if the sensor is active
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bool isActive = false;
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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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bool hasBatchParamsForIdent(void* ident) const {
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return batchParams.indexOfKey(ident) >= 0;
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}
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/**
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* @return The number of active clients of this sensor.
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*/
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int numActiveClients() const;
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};
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DefaultKeyedVector<int, Info> mActivationCount;
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// Keep track of any hidl transport failures
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SensorServiceUtil::RingBuffer<HidlTransportErrorLog> mHidlTransportErrors;
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int mTotalHidlTransportErrors;
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/**
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* Enums describing the reason why a client was disabled.
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*/
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enum DisabledReason : uint8_t {
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// UID becomes idle (e.g. app goes to background).
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DISABLED_REASON_UID_IDLE = 0,
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// Sensors are restricted for all clients.
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DISABLED_REASON_SERVICE_RESTRICTED,
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DISABLED_REASON_MAX,
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};
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static_assert(DisabledReason::DISABLED_REASON_MAX < sizeof(uint8_t) * CHAR_BIT);
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// Use this map to determine which client is activated or deactivated.
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std::unordered_map<void *, uint8_t> mDisabledClients;
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void addDisabledReasonForIdentLocked(void* ident, DisabledReason reason);
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void removeDisabledReasonForIdentLocked(void* ident, DisabledReason reason);
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SensorDevice();
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bool connectHidlService();
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void initializeSensorList();
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void reactivateSensors(const DefaultKeyedVector<int, Info>& previousActivations);
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static bool sensorHandlesChanged(const Vector<sensor_t>& oldSensorList,
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const Vector<sensor_t>& newSensorList);
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static bool sensorIsEquivalent(const sensor_t& prevSensor, const sensor_t& newSensor);
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enum HalConnectionStatus {
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CONNECTED, // Successfully connected to the HAL
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DOES_NOT_EXIST, // Could not find the HAL
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FAILED_TO_CONNECT, // Found the HAL but failed to connect/initialize
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UNKNOWN,
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};
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HalConnectionStatus connectHidlServiceV1_0();
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HalConnectionStatus connectHidlServiceV2_0();
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HalConnectionStatus connectHidlServiceV2_1();
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HalConnectionStatus initializeHidlServiceV2_X();
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ssize_t pollHal(sensors_event_t* buffer, size_t count);
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ssize_t pollFmq(sensors_event_t* buffer, size_t count);
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status_t activateLocked(void* ident, int handle, int enabled);
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status_t batchLocked(void* ident, int handle, int flags, int64_t samplingPeriodNs,
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int64_t maxBatchReportLatencyNs);
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status_t updateBatchParamsLocked(int handle, Info& info);
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status_t doActivateHardwareLocked(int handle, bool enable);
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void handleHidlDeath(const std::string &detail);
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template<typename T>
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void checkReturn(const Return<T>& ret) {
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if (!ret.isOk()) {
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handleHidlDeath(ret.description());
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}
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}
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status_t checkReturnAndGetStatus(const Return<Result>& ret);
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//TODO(b/67425500): remove waiter after bug is resolved.
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sp<SensorDeviceUtils::HidlServiceRegistrationWaiter> mRestartWaiter;
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bool isClientDisabled(void* ident) const;
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bool isClientDisabledLocked(void* ident) const;
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std::vector<void *> getDisabledClientsLocked() const;
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bool clientHasNoAccessLocked(void* ident) const;
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using Event = hardware::sensors::V2_1::Event;
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using SensorInfo = hardware::sensors::V2_1::SensorInfo;
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void convertToSensorEvent(const Event &src, sensors_event_t *dst);
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void convertToSensorEventsAndQuantize(
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const hardware::hidl_vec<Event> &src,
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const hardware::hidl_vec<SensorInfo> &dynamicSensorsAdded,
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sensors_event_t *dst);
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float getResolutionForSensor(int sensorHandle);
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bool mIsDirectReportSupported;
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typedef hardware::MessageQueue<uint32_t, hardware::kSynchronizedReadWrite> WakeLockQueue;
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std::unique_ptr<WakeLockQueue> mWakeLockQueue;
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hardware::EventFlag* mEventQueueFlag;
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hardware::EventFlag* mWakeLockQueueFlag;
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std::array<Event, SensorEventQueue::MAX_RECEIVE_BUFFER_EVENT_COUNT> mEventBuffer;
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sp<SensorsHalDeathReceivier> mSensorsHalDeathReceiver;
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std::atomic_bool mReconnecting;
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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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