qt-everywhere-src-5.15.1/qtmultimedia/src/multimedia/audio/qsoundeffect_qaudio_p.h

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#ifndef QSOUNDEFFECT_QAUDIO_H
#define QSOUNDEFFECT_QAUDIO_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 <QtCore/qobject.h>
#include <QtCore/qurl.h>
#include "qaudiooutput.h"
#include "qsamplecache_p.h"
#include "qsoundeffect.h"

QT_BEGIN_NAMESPACE

class QSoundEffectPrivate;

class PrivateSoundSource : public QIODevice
{
    friend class QSoundEffectPrivate;
    Q_OBJECT
public:
    PrivateSoundSource(QSoundEffectPrivate *s, const QAudioDeviceInfo &audioDevice = QAudioDeviceInfo());
    ~PrivateSoundSource() {}

    qint64 readData(char *data, qint64 len) override;
    qint64 writeData(const char *data, qint64 len) override;

private Q_SLOTS:
    void sampleReady();
    void decoderError();
    void stateChanged(QAudio::State);

private:
    QUrl m_url;
    int m_loopCount = 1;
    int m_runningCount = 0;
    bool m_playing = false;
    QSoundEffect::Status  m_status = QSoundEffect::Null;
    QAudioOutput *m_audioOutput = nullptr;
    QSample *m_sample = nullptr;
    bool m_muted = false;
    qreal m_volume = 1.0;
    bool m_sampleReady = false;
    qint64 m_offset = 0;
    QString m_category;
    QAudioDeviceInfo m_audioDevice;
    QSoundEffectPrivate *soundeffect = nullptr;
};


class QSoundEffectPrivate : public QObject
{
    friend class PrivateSoundSource;
    Q_OBJECT
public:

    explicit QSoundEffectPrivate(QObject *parent);
    explicit QSoundEffectPrivate(const QAudioDeviceInfo &audioDevice, QObject *parent);
    ~QSoundEffectPrivate();

    static QStringList supportedMimeTypes();

    QUrl source() const;
    void setSource(const QUrl &url);
    int loopCount() const;
    int loopsRemaining() const;
    void setLoopCount(int loopCount);
    qreal volume() const;
    void setVolume(qreal volume);
    bool isMuted() const;
    void setMuted(bool muted);
    bool isLoaded() const;
    bool isPlaying() const;
    QSoundEffect::Status status() const;

    void release();

    QString category() const;
    void setCategory(const QString &);

public Q_SLOTS:
    void play();
    void stop();

Q_SIGNALS:
    void loopsRemainingChanged();
    void volumeChanged();
    void mutedChanged();
    void loadedChanged();
    void playingChanged();
    void statusChanged();
    void categoryChanged();

private:
    void setStatus(QSoundEffect::Status status);
    void setPlaying(bool playing);
    void setLoopsRemaining(int loopsRemaining);

    PrivateSoundSource *d = nullptr;
};

QT_END_NAMESPACE

#endif // QSOUNDEFFECT_QAUDIO_H