qwasmmediarecorder_p.h

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// Copyright (C) 2022 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 QWASMMEDIARECORDER_H
#define QWASMMEDIARECORDER_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/qplatformmediarecorder_p.h>
#include <private/qplatformmediacapture_p.h>
#include <QtCore/qglobal.h>
#include <QtCore/qloggingcategory.h>
#include <QElapsedTimer>
 
#include <emscripten.h>
#include <emscripten/val.h>
#include <emscripten/bind.h>
#include <private/qstdweb_p.h>
 
QT_BEGIN_NAMESPACE
 
Q_DECLARE_LOGGING_CATEGORY(qWasmMediaRecorder)
 
class QWasmMediaCaptureSession;
class QIODevice;
 
class QWasmMediaRecorder final : public QObject, public QPlatformMediaRecorder
{
    Q_OBJECT
public:
    explicit QWasmMediaRecorder(QMediaRecorder *parent);
    ~QWasmMediaRecorder() final;
 
    bool isLocationWritable(const QUrl &location) const override;
    QMediaRecorder::RecorderState state() const override;
    qint64 duration() const override;
    void record(QMediaEncoderSettings &settings) override;
    void pause() override;
    void resume() override;
    void stop() override;
 
    void setCaptureSession(QPlatformMediaCaptureSession *session);
 
private:
 
    bool hasCamera() const;
    void startAudioRecording();
    void setStream(emscripten::val stream);
    void streamCallback(emscripten::val event);
    void exceptionCallback(emscripten::val event);
    void dataAvailableCallback(emscripten::val dataEvent);
    void startStream();
    void setTrackContraints(QMediaEncoderSettings &settings, emscripten::val stream);
    void initUserMedia();
    void audioDataAvailable(emscripten::val Blob, double timeCodeDifference);
    void setUpFileSink();
 
    emscripten::val m_mediaRecorder = emscripten::val::undefined();
    emscripten::val m_mediaStream = emscripten::val::undefined();
 
    QWasmMediaCaptureSession *m_session = nullptr;
    QMediaEncoderSettings m_mediaSettings;
    QIODevice *m_outputTarget;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamDataAvailable;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamStopped;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamError;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamStart;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamPause;
    QScopedPointer<qstdweb::EventCallback> m_mediaStreamResume;
 
    qint64 m_durationMs = 0;
    bool m_isRecording = false;
    QScopedPointer <QElapsedTimer> m_durationTimer;
 
private Q_SLOTS:
};
 
QT_END_NAMESPACE
 
#endif // QWASMMEDIARECORDER_H