qwasmaudiooutput_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 QWASMAUDIOOUTPUT_H

#define QWASMAUDIOOUTPUT_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 "qwasmmediaplayer_p.h"

#include <QtMultimedia/private/qplatformaudiooutput_p.h>

#include <QtMultimedia/private/qwasmwebaudiosink_p.h>

#include <QtCore/qiodevice.h>

#include <QtCore/qobject.h>

#include <QtCore/private/qstdweb_p.h>

#include <emscripten/val.h>

QT_BEGIN_NAMESPACE

class Q_MULTIMEDIA_EXPORT QWasmAudioOutput : public QObject, public QPlatformAudioOutput

    Q_OBJECT

public:

    QWasmAudioOutput(QAudioOutput *qq);

    ~QWasmAudioOutput();

    enum AudioElementError {

        MEDIA_ERR_ABORTED = 1,

        MEDIA_ERR_NETWORK,

        MEDIA_ERR_DECODE,

        MEDIA_ERR_SRC_NOT_SUPPORTED

};

    void setAudioDevice(const QAudioDevice &device) final;

    void setMuted(bool muted) override;

    void setVolume(float volume) override;

    void start();

    void stop();

    void pause();

    void setSource(const QUrl &url);

    void setSource(QIODevice *stream);

    void setVideoElement(emscripten::val videoElement);

Q_SIGNALS:

    void readyChanged(bool);

    void bufferingChanged(qint32 percent);

    void errorOccured(qint32 code, const QString &message);

    void stateChanged(QWasmMediaPlayer::QWasmMediaPlayerState newState);

    void progressChanged(qint32 position);

    void durationChanged(qint64 duration);

    void statusChanged(QMediaPlayer::MediaStatus status);

    void sizeChange(qint32 width, qint32 height);

    void metaDataLoaded();

    void seekableChanged(bool seekable);

private:

    void doElementCallbacks();

    void createAudioElement(const std::string &id);

    emscripten::val videoElement();

    QScopedPointer<QWasmAudioSink> m_sink;

    QScopedPointer<qstdweb::EventCallback> m_playEvent;

    QScopedPointer<qstdweb::EventCallback> m_endedEvent;

    QScopedPointer<qstdweb::EventCallback> m_durationChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_errorChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_canPlayChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_canPlayThroughChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_playingChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_progressChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_pauseChangeEvent;

    QScopedPointer<qstdweb::EventCallback> m_timeUpdateEvent;

    QScopedPointer<qstdweb::EventCallback> m_loadedDataEvent;

    QString m_source;

    QIODevice *m_audioIODevice = nullptr;

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

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

    QMediaPlayer::MediaStatus m_currentMediaStatus;

    qreal m_currentBufferedValue;

};

QT_END_NAMESPACE

#endif // QWASMAUDIOOUTPUT_H