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/*
* Copyright (C) 2017 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "SensorDeviceUtils.h"
#include <android/hardware/sensors/1.0/ISensors.h>
#include <android/hardware/sensors/2.1/ISensors.h>
#include <utils/Log.h>
#include <chrono>
#include <thread>
using ::android::hardware::Void;
using SensorTypeV2_1 = android::hardware::sensors::V2_1::SensorType;
using namespace android::hardware::sensors::V1_0;
namespace android {
namespace SensorDeviceUtils {
void quantizeSensorEventValues(sensors_event_t *event, float resolution) {
if (resolution == 0) {
return;
}
size_t axes = 0;
switch ((SensorTypeV2_1)event->type) {
case SensorTypeV2_1::ACCELEROMETER:
case SensorTypeV2_1::MAGNETIC_FIELD:
case SensorTypeV2_1::GYROSCOPE:
case SensorTypeV2_1::MAGNETIC_FIELD_UNCALIBRATED:
case SensorTypeV2_1::GYROSCOPE_UNCALIBRATED:
case SensorTypeV2_1::ACCELEROMETER_UNCALIBRATED:
axes = 3;
break;
case SensorTypeV2_1::DEVICE_ORIENTATION:
case SensorTypeV2_1::LIGHT:
case SensorTypeV2_1::PRESSURE:
case SensorTypeV2_1::TEMPERATURE:
case SensorTypeV2_1::PROXIMITY:
case SensorTypeV2_1::RELATIVE_HUMIDITY:
case SensorTypeV2_1::AMBIENT_TEMPERATURE:
case SensorTypeV2_1::SIGNIFICANT_MOTION:
case SensorTypeV2_1::STEP_DETECTOR:
case SensorTypeV2_1::TILT_DETECTOR:
case SensorTypeV2_1::WAKE_GESTURE:
case SensorTypeV2_1::GLANCE_GESTURE:
case SensorTypeV2_1::PICK_UP_GESTURE:
case SensorTypeV2_1::WRIST_TILT_GESTURE:
case SensorTypeV2_1::STATIONARY_DETECT:
case SensorTypeV2_1::MOTION_DETECT:
case SensorTypeV2_1::HEART_BEAT:
case SensorTypeV2_1::LOW_LATENCY_OFFBODY_DETECT:
case SensorTypeV2_1::HINGE_ANGLE:
axes = 1;
break;
default:
// No other sensors have data that needs to be quantized.
break;
}
// sensor_event_t is a union so we're able to perform the same quanitization action for most
// sensors by only knowing the number of axes their output data has.
for (size_t i = 0; i < axes; i++) {
quantizeValue(&event->data[i], resolution);
}
}
float resolutionForSensor(const sensor_t &sensor) {
switch ((SensorTypeV2_1)sensor.type) {
case SensorTypeV2_1::ACCELEROMETER:
case SensorTypeV2_1::MAGNETIC_FIELD:
case SensorTypeV2_1::GYROSCOPE:
case SensorTypeV2_1::MAGNETIC_FIELD_UNCALIBRATED:
case SensorTypeV2_1::GYROSCOPE_UNCALIBRATED:
case SensorTypeV2_1::ACCELEROMETER_UNCALIBRATED: {
if (sensor.maxRange == 0) {
ALOGE("No max range for sensor type %d, can't determine appropriate resolution",
sensor.type);
return sensor.resolution;
}
// Accel, gyro, and mag shouldn't have more than 24 bits of resolution on the most
// advanced devices.
double lowerBound = 2.0 * sensor.maxRange / std::pow(2, 24);
// No need to check the upper bound as that's already enforced through CTS.
return std::max(sensor.resolution, static_cast<float>(lowerBound));
}
case SensorTypeV2_1::SIGNIFICANT_MOTION:
case SensorTypeV2_1::STEP_DETECTOR:
case SensorTypeV2_1::STEP_COUNTER:
case SensorTypeV2_1::TILT_DETECTOR:
case SensorTypeV2_1::WAKE_GESTURE:
case SensorTypeV2_1::GLANCE_GESTURE:
case SensorTypeV2_1::PICK_UP_GESTURE:
case SensorTypeV2_1::WRIST_TILT_GESTURE:
case SensorTypeV2_1::STATIONARY_DETECT:
case SensorTypeV2_1::MOTION_DETECT:
// Ignore input resolution as all of these sensors are required to have a resolution of
// 1.
return 1.0f;
default:
// fall through and return the current resolution for all other types
break;
}
return sensor.resolution;
}
HidlServiceRegistrationWaiter::HidlServiceRegistrationWaiter() {
}
void HidlServiceRegistrationWaiter::onFirstRef() {
// Creating sp<...>(this) in the constructor should be avoided, hence
// registerForNotifications is called in onFirstRef callback.
mRegistered = ISensors::registerForNotifications("default", this);
}
Return<void> HidlServiceRegistrationWaiter::onRegistration(
const hidl_string &fqName, const hidl_string &name, bool preexisting) {
ALOGV("onRegistration fqName %s, name %s, preexisting %d",
fqName.c_str(), name.c_str(), preexisting);
{
std::lock_guard<std::mutex> lk(mLock);
mRestartObserved = true;
}
mCondition.notify_all();
return Void();
}
void HidlServiceRegistrationWaiter::reset() {
std::lock_guard<std::mutex> lk(mLock);
mRestartObserved = false;
}
bool HidlServiceRegistrationWaiter::wait() {
constexpr int DEFAULT_WAIT_MS = 100;
constexpr int TIMEOUT_MS = 1000;
if (!mRegistered) {
ALOGW("Cannot register service notification, use default wait(%d ms)", DEFAULT_WAIT_MS);
std::this_thread::sleep_for(std::chrono::milliseconds(DEFAULT_WAIT_MS));
// not sure if service is actually restarted
return false;
}
std::unique_lock<std::mutex> lk(mLock);
return mCondition.wait_for(lk, std::chrono::milliseconds(TIMEOUT_MS),
[this]{return mRestartObserved;});
}
} // namespace SensorDeviceUtils
} // namespace android
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