qwasmmediadevices_p.h

Enable keyboard shortcuts

// Copyright (C) 2021 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

#ifndef QWASMMEDIADEVICES_H

#define QWASMMEDIADEVICES_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API. It exists purely as an

// implementation detail. This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <private/qplatformaudiodevices_p.h>

#include <private/qplatformvideodevices_p.h>

#include "qwasmjs_p.h"

#include <QtCore/private/qstdweb_p.h>

#include <qaudio.h>

#include <qaudiodevice.h>

#include <qcameradevice.h>

#include <qset.h>

#include <QtCore/qloggingcategory.h>

#include <emscripten.h>

#include <emscripten/val.h>

#include <emscripten/bind.h>

#include <string_view>

QT_BEGIN_NAMESPACE

Q_DECLARE_LOGGING_CATEGORY(qWasmMediaDevices)

class QWasmAudioEngine;

class QWasmMediaDevices;

class QWasmCameraDevices : public QPlatformVideoDevices

    Q_OBJECT

public:

    QWasmCameraDevices(QPlatformMediaIntegration *integration);

    using QPlatformVideoDevices::onVideoInputsChanged;

protected:

    QList<QCameraDevice> findVideoInputs() const override;

    void connectNotify(const QMetaMethod &signal) override;

private:

    // weak

    QWasmMediaDevices *m_mediaDevices;

};

class QWasmAudioDevices : public QPlatformAudioDevices

public:

    QWasmAudioDevices();

    QPlatformAudioSource *createAudioSource(const QAudioDevice &, const QAudioFormat &,

                                            QObject *parent) override;

    QPlatformAudioSink *createAudioSink(const QAudioDevice &, const QAudioFormat &,

                                        QObject *parent) override;

    QLatin1String backendName() const override { return QLatin1String{ "WebAssembly" }; }

    using QPlatformAudioDevices::onAudioInputsChanged;

    using QPlatformAudioDevices::onAudioOutputsChanged;

protected:

    QList<QAudioDevice> findAudioInputs() const override;

    QList<QAudioDevice> findAudioOutputs() const override;

    void connectNotify(const QMetaMethod &signal) override;

};

class QWasmMediaDevices

public:

    QWasmMediaDevices();

    static QWasmMediaDevices *instance();

    QList<QCameraDevice> videoInputs() const;

    QList<QAudioDevice> audioInputs() const;

    QList<QAudioDevice> audioOutputs() const;

    void initDevices();

    void getMediaDevices();

private:

    void updateCameraDevices();

    void parseDevices(emscripten::val devices);

    void insertFallbackAudioOutput();

    QByteArray findDefaultDeviceId(emscripten::val devices, std::string_view deviceKind) const;

    static void applyDefaultDevice(QList<QAudioDevice> &audioDevices,

                                   const QByteArray &defaultDeviceId);

    static void applyDefaultDevice(QList<QCameraDevice> &cameraDevices,

                                   const QByteArray &defaultDeviceId);

    // insertion order, stable across hot-plug

    QList<QAudioDevice> m_audioOutputs;

    QList<QAudioDevice> m_audioInputs;

    QList<QCameraDevice> m_cameraDevices;

    std::unique_ptr<qstdweb::EventCallback> m_deviceChangedCallback;

    bool m_videoInputsAdded = false;

    bool m_audioInputsAdded = false;

    bool m_audioOutputsAdded = false;

    emscripten::val m_jsMediaDevicesInterface = emscripten::val::undefined();

    bool m_initDone = false;

    emscripten::val devicesList;

};

QT_END_NAMESPACE

#endif