winrtaccelerometer.cpp

Enable keyboard shortcuts

// Copyright (C) 2017 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#include "winrtaccelerometer.h"

#include "winrtcommon.h"

#include <QtSensors/QAccelerometerReading>

#include <functional>

#include <wrl.h>

#include <windows.devices.sensors.h>

using namespace Microsoft::WRL;

using namespace Microsoft::WRL::Wrappers;

using namespace ABI::Windows::Foundation;

using namespace ABI::Windows::Devices::Sensors;

typedef ITypedEventHandler<Accelerometer *, AccelerometerReadingChangedEventArgs *> AccelerometerReadingHandler;

QT_BEGIN_NAMESPACE

#define GRAVITY_EARTH_MS2 9.80665

class WinRtAccelerometerPrivate

public:

    WinRtAccelerometerPrivate(WinRtAccelerometer *p)

        : minimumReportInterval(0), q(p)

        token.value = 0;

    QAccelerometerReading reading;

    ComPtr<IAccelerometer> sensor;

    EventRegistrationToken token;

    quint32 minimumReportInterval;

    HRESULT readingChanged(IAccelerometer *, IAccelerometerReadingChangedEventArgs *args)

        ComPtr<IAccelerometerReading> value;

        HRESULT hr = args->get_Reading(&value);

        if (FAILED(hr)) {

            qCWarning(lcWinRtSensors) << "Failed to get accelerometer reading" << qt_error_string(hr);

            return hr;

        DOUBLE x;

        hr = value->get_AccelerationX(&x);

        if (FAILED(hr))

            qCWarning(lcWinRtSensors) << "Failed to get acceleration X" << qt_error_string(hr);

        DOUBLE y;

        hr = value->get_AccelerationY(&y);

        if (FAILED(hr))

            qCWarning(lcWinRtSensors) << "Failed to get acceleration Y" << qt_error_string(hr);

        DOUBLE z;

        hr = value->get_AccelerationZ(&z);

        if (FAILED(hr))

            qCWarning(lcWinRtSensors) << "Failed to get acceleration Z" << qt_error_string(hr);

        DateTime dateTime;

        hr = value->get_Timestamp(&dateTime);

        if (FAILED(hr))

            qCWarning(lcWinRtSensors) << "Failed to get acceleration timestamp" << qt_error_string(hr);

        // The reading is in G force, so convert to m/s/s

        reading.setX(x * GRAVITY_EARTH_MS2);

        reading.setY(y * GRAVITY_EARTH_MS2);

        reading.setZ(z * GRAVITY_EARTH_MS2);

        reading.setTimestamp(dateTimeToMsSinceEpoch(dateTime));

        q->newReadingAvailable();

        return S_OK;

private:

    WinRtAccelerometer *q;

};

WinRtAccelerometer::WinRtAccelerometer(QSensor *sensor)

    : QSensorBackend(sensor), d_ptr(new WinRtAccelerometerPrivate(this))

    Q_D(WinRtAccelerometer);

    HStringReference classId(RuntimeClass_Windows_Devices_Sensors_Accelerometer);

    ComPtr<IAccelerometerStatics> factory;

    HRESULT hr = RoGetActivationFactory(classId.Get(), IID_PPV_ARGS(&factory));

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to initialize accelerometer factory."

                                      << qt_error_string(hr);

        sensorError(hr);

        return;

    hr = factory->GetDefault(&d->sensor);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to get default accelerometer."

                                      << qt_error_string(hr);

        sensorError(hr);

        return;

    if (!d->sensor) {

        qCWarning(lcWinRtSensors) << "Default accelerometer was not found on the system.";

        return;

    hr = d->sensor->get_MinimumReportInterval(&d->minimumReportInterval);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to get the minimum report interval."

                                  << qt_error_string(hr);

        sensorError(hr);

        return;

    addDataRate(1, 1000 / d->minimumReportInterval); // dataRate in Hz

    sensor->setDataRate(1);

    setReading<QAccelerometerReading>(&d->reading);

WinRtAccelerometer::~WinRtAccelerometer()

void WinRtAccelerometer::start()

    Q_D(WinRtAccelerometer);

    if (!d->sensor)

        return;

    if (d->token.value)

        return;

    ComPtr<AccelerometerReadingHandler> callback =

        Callback<AccelerometerReadingHandler>(d, &WinRtAccelerometerPrivate::readingChanged);

    HRESULT hr = d->sensor->add_ReadingChanged(callback.Get(), &d->token);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to attach to reading changed event."

                                  << qt_error_string(hr);

        sensorError(hr);

        return;

    int dataRate = sensor()->dataRate();

    if (!dataRate)

        return;

    quint32 reportInterval = qMax(d->minimumReportInterval, quint32(1000/dataRate));

    hr = d->sensor->put_ReportInterval(reportInterval);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to attach to set report interval."

                                  << qt_error_string(hr);

        sensorError(hr);

void WinRtAccelerometer::stop()

    Q_D(WinRtAccelerometer);

    if (!d->sensor)

        return;

    if (!d->token.value)

        return;

    HRESULT hr = d->sensor->remove_ReadingChanged(d->token);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to detach from reading changed event."

                                  << qt_error_string(hr);

        sensorError(hr);

        return;

    hr = d->sensor->put_ReportInterval(0);

    if (FAILED(hr)) {

        qCWarning(lcWinRtSensors) << "Unable to reset report interval."

                                  << qt_error_string(hr);

        sensorError(hr);

        return;

    d->token.value = 0;

QT_END_NAMESPACE