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Diffstat (limited to 'src/plugins/winrt/qwinrtvideodeviceselectorcontrol.cpp')
| -rw-r--r-- | src/plugins/winrt/qwinrtvideodeviceselectorcontrol.cpp | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/src/plugins/winrt/qwinrtvideodeviceselectorcontrol.cpp b/src/plugins/winrt/qwinrtvideodeviceselectorcontrol.cpp new file mode 100644 index 000000000..8058c3dad --- /dev/null +++ b/src/plugins/winrt/qwinrtvideodeviceselectorcontrol.cpp @@ -0,0 +1,383 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qwinrtvideodeviceselectorcontrol.h" + +#include <QtCore/qfunctions_winrt.h> +#include <QtCore/QVector> +#include <QtCore/QCoreApplication> +#include <QtCore/QEventLoop> +#include <QtCore/QGlobalStatic> + +#include <wrl.h> +#include <windows.devices.enumeration.h> + +using namespace ABI::Windows::Devices::Enumeration; +using namespace ABI::Windows::Foundation; +using namespace ABI::Windows::Foundation::Collections; +using namespace Microsoft::WRL; +using namespace Microsoft::WRL::Wrappers; + +typedef ITypedEventHandler<DeviceWatcher *, DeviceInformation *> DeviceInformationHandler; +typedef ITypedEventHandler<DeviceWatcher *, DeviceInformationUpdate *> DeviceInformationUpdateHandler; +typedef ITypedEventHandler<DeviceWatcher *, IInspectable *> DeviceEnumerationCompletedHandler; + +QT_USE_NAMESPACE + +static QString deviceName(IDeviceInformation *device) +{ + HRESULT hr; + HString id; + hr = device->get_Id(id.GetAddressOf()); + Q_ASSERT_SUCCEEDED(hr); + quint32 length; + const wchar_t *buffer = id.GetRawBuffer(&length); + return QString::fromWCharArray(buffer, length); +} + +static QString deviceDescription(IDeviceInformation *device) +{ + HRESULT hr; + HString name; + hr = device->get_Name(name.GetAddressOf()); + Q_ASSERT_SUCCEEDED(hr); + quint32 length; + const wchar_t *buffer = name.GetRawBuffer(&length); + return QString::fromWCharArray(buffer, length); +} + +struct QWinRTVideoDeviceSelectorControlGlobal +{ + QWinRTVideoDeviceSelectorControlGlobal() + : defaultDeviceIndex(-1) + { + HRESULT hr; + ComPtr<IDeviceInformationStatics> deviceWatcherFactory; + hr = RoGetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Enumeration_DeviceInformation).Get(), + IID_PPV_ARGS(&deviceWatcherFactory)); + Q_ASSERT_SUCCEEDED(hr); + hr = deviceWatcherFactory->CreateWatcherDeviceClass(DeviceClass_VideoCapture, &deviceWatcher); + Q_ASSERT_SUCCEEDED(hr); + + hr = deviceWatcher->add_Added( + Callback<DeviceInformationHandler>(this, &QWinRTVideoDeviceSelectorControlGlobal::onDeviceAdded).Get(), + &deviceAddedToken); + Q_ASSERT_SUCCEEDED(hr); + + hr = deviceWatcher->add_Removed( + Callback<DeviceInformationUpdateHandler>(this, &QWinRTVideoDeviceSelectorControlGlobal::onDeviceRemoved).Get(), + &deviceRemovedToken); + Q_ASSERT_SUCCEEDED(hr); + + hr = deviceWatcher->add_Updated( + Callback<DeviceInformationUpdateHandler>(this, &QWinRTVideoDeviceSelectorControlGlobal::onDeviceUpdated).Get(), + &deviceUpdatedToken); + Q_ASSERT_SUCCEEDED(hr); + + // Synchronously populate the devices on construction + ComPtr<IAsyncOperation<DeviceInformationCollection *>> op; + hr = deviceWatcherFactory->FindAllAsyncDeviceClass(DeviceClass_VideoCapture, &op); + Q_ASSERT_SUCCEEDED(hr); + ComPtr<IVectorView<DeviceInformation *>> deviceList; + hr = QWinRTFunctions::await(op, deviceList.GetAddressOf()); + Q_ASSERT_SUCCEEDED(hr); + quint32 deviceCount; + hr = deviceList->get_Size(&deviceCount); + Q_ASSERT_SUCCEEDED(hr); + for (quint32 i = 0; i < deviceCount; ++i) { + IDeviceInformation *device; + hr = deviceList->GetAt(i, &device); + Q_ASSERT_SUCCEEDED(hr); + onDeviceAdded(Q_NULLPTR, device); + } + + // If there is no default device provided by the API, choose the first one + if (!devices.isEmpty() && defaultDeviceIndex < 0) + defaultDeviceIndex = 0; + } + + ~QWinRTVideoDeviceSelectorControlGlobal() + { + HRESULT hr; + hr = deviceWatcher->remove_Added(deviceAddedToken); + Q_ASSERT_SUCCEEDED(hr); + hr = deviceWatcher->remove_Removed(deviceRemovedToken); + Q_ASSERT_SUCCEEDED(hr); + hr = deviceWatcher->remove_Updated(deviceUpdatedToken); + Q_ASSERT_SUCCEEDED(hr); + } + +private: + HRESULT onDeviceAdded(IDeviceWatcher *, IDeviceInformation *device) + { + const QString name = deviceName(device); + if (deviceIndex.contains(name)) + return S_OK; + + devices.append(device); + const int index = devices.size() - 1; + deviceIndex.insert(name, index); + + HRESULT hr; + boolean isDefault; + hr = device->get_IsDefault(&isDefault); + Q_ASSERT_SUCCEEDED(hr); + if (isDefault) + defaultDeviceIndex = index; + + foreach (QWinRTVideoDeviceSelectorControl *watcher, watchers) + emit watcher->devicesChanged(); + + return S_OK; + } + + HRESULT onDeviceRemoved(IDeviceWatcher *, IDeviceInformationUpdate *device) + { + HRESULT hr; + HString id; + hr = device->get_Id(id.GetAddressOf()); + Q_ASSERT_SUCCEEDED(hr); + + HString name; + hr = device->get_Id(name.GetAddressOf()); + Q_ASSERT_SUCCEEDED(hr); + quint32 nameLength; + const wchar_t *nameString = name.GetRawBuffer(&nameLength); + const int index = deviceIndex.take(QString::fromWCharArray(nameString, nameLength)); + if (index >= 0) + devices.remove(index); + + foreach (QWinRTVideoDeviceSelectorControl *watcher, watchers) + emit watcher->devicesChanged(); + + return S_OK; + } + + HRESULT onDeviceUpdated(IDeviceWatcher *, IDeviceInformationUpdate *) + { + // A name or description may have changed, so emit devicesChanged + foreach (QWinRTVideoDeviceSelectorControl *watcher, watchers) + emit watcher->devicesChanged(); + + return S_OK; + } + +public: + void addWatcher(QWinRTVideoDeviceSelectorControl *control) + { + watchers.append(control); + + HRESULT hr; + DeviceWatcherStatus status; + hr = deviceWatcher->get_Status(&status); + Q_ASSERT_SUCCEEDED(hr); + if (status != DeviceWatcherStatus_Started) { + // We can't immediately Start() if we have just called Stop() + while (status == DeviceWatcherStatus_Stopping) { + QThread::yieldCurrentThread(); + hr = deviceWatcher->get_Status(&status); + Q_ASSERT_SUCCEEDED(hr); + } + hr = deviceWatcher->Start(); + Q_ASSERT_SUCCEEDED(hr); + } + } + + void removeWatcher(QWinRTVideoDeviceSelectorControl *control) + { + watchers.removeAll(control); + + if (!watchers.isEmpty()) + return; + + HRESULT hr; + DeviceWatcherStatus status; + hr = deviceWatcher->get_Status(&status); + Q_ASSERT_SUCCEEDED(hr); + if (status == DeviceWatcherStatus_Stopped || status == DeviceWatcherStatus_Stopping) + return; + + hr = deviceWatcher->Stop(); + Q_ASSERT_SUCCEEDED(hr); + } + + QVector<ComPtr<IDeviceInformation>> devices; + QHash<QString, int> deviceIndex; + int defaultDeviceIndex; + +private: + ComPtr<IDeviceWatcher> deviceWatcher; + QList<QWinRTVideoDeviceSelectorControl *> watchers; + EventRegistrationToken deviceAddedToken; + EventRegistrationToken deviceRemovedToken; + EventRegistrationToken deviceUpdatedToken; +}; +Q_GLOBAL_STATIC(QWinRTVideoDeviceSelectorControlGlobal, g) + +class QWinRTVideoDeviceSelectorControlPrivate +{ +public: + int selectedDevice; +}; + +QWinRTVideoDeviceSelectorControl::QWinRTVideoDeviceSelectorControl(QObject *parent) + : QVideoDeviceSelectorControl(parent), d_ptr(new QWinRTVideoDeviceSelectorControlPrivate) +{ + Q_D(QWinRTVideoDeviceSelectorControl); + d->selectedDevice = -1; + g->addWatcher(this); +} + +QWinRTVideoDeviceSelectorControl::~QWinRTVideoDeviceSelectorControl() +{ + if (g.isDestroyed()) + return; + + g->removeWatcher(this); +} + +int QWinRTVideoDeviceSelectorControl::deviceCount() const +{ + return g->devices.size(); +} + +QString QWinRTVideoDeviceSelectorControl::deviceName(int index) const +{ + if (index < 0 || index >= g->devices.size()) + return QString(); + + return ::deviceName(g->devices.at(index).Get()); +} + +QString QWinRTVideoDeviceSelectorControl::deviceDescription(int index) const +{ + if (index < 0 || index >= g->devices.size()) + return QString(); + + return ::deviceDescription(g->devices.at(index).Get()); +} + +int QWinRTVideoDeviceSelectorControl::defaultDevice() const +{ + return g->defaultDeviceIndex; +} + +int QWinRTVideoDeviceSelectorControl::selectedDevice() const +{ + Q_D(const QWinRTVideoDeviceSelectorControl); + return d->selectedDevice; +} + +QCamera::Position QWinRTVideoDeviceSelectorControl::cameraPosition(const QString &deviceName) +{ + int deviceIndex = g->deviceIndex.value(deviceName); + IDeviceInformation *deviceInfo = g->devices.value(deviceIndex).Get(); + if (!deviceInfo) + return QCamera::UnspecifiedPosition; + + ComPtr<IEnclosureLocation> enclosureLocation; + HRESULT hr; + hr = deviceInfo->get_EnclosureLocation(&enclosureLocation); + RETURN_IF_FAILED("Failed to get camera enclosure location", return QCamera::UnspecifiedPosition); + if (!enclosureLocation) + return QCamera::UnspecifiedPosition; + + Panel panel; + hr = enclosureLocation->get_Panel(&panel); + RETURN_IF_FAILED("Failed to get camera panel location", return QCamera::UnspecifiedPosition); + + switch (panel) { + case Panel_Front: + return QCamera::FrontFace; + case Panel_Back: + return QCamera::BackFace; + default: + break; + } + return QCamera::UnspecifiedPosition; +} + +int QWinRTVideoDeviceSelectorControl::cameraOrientation(const QString &deviceName) +{ + Q_UNUSED(deviceName); + return 0; +} + +QList<QByteArray> QWinRTVideoDeviceSelectorControl::deviceNames() +{ + QList<QByteArray> devices; + foreach (const QString &device, g->deviceIndex.keys()) + devices.append(device.toUtf8()); + + return devices; +} + +QByteArray QWinRTVideoDeviceSelectorControl::deviceDescription(const QByteArray &deviceName) +{ + int deviceIndex = g->deviceIndex.value(QString::fromUtf8(deviceName), -1); + if (deviceIndex < 0) + return QByteArray(); + + return ::deviceDescription(g->devices.value(deviceIndex).Get()).toUtf8(); +} + +QByteArray QWinRTVideoDeviceSelectorControl::defaultDeviceName() +{ + if (g->defaultDeviceIndex < 0) + return QByteArray(); + + return ::deviceName(g->devices.value(g->defaultDeviceIndex).Get()).toUtf8(); +} + +void QWinRTVideoDeviceSelectorControl::setSelectedDevice(int index) +{ + Q_D(QWinRTVideoDeviceSelectorControl); + + int selectedDevice = index; + if (index < 0 || index >= g->devices.size()) + selectedDevice = -1; + + if (d->selectedDevice != selectedDevice) { + d->selectedDevice = selectedDevice; + emit selectedDeviceChanged(d->selectedDevice); + emit selectedDeviceChanged(deviceName(d->selectedDevice)); + } +} |