qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/wasapi/qwasapiaudioinput.h

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#ifndef QAUDIOINPUTWASAPI_H
#define QAUDIOINPUTWASAPI_H

#include <QtCore/QLoggingCategory>
#include <QtCore/QMutex>
#include <QtCore/QTime>
#include <QtMultimedia/QAbstractAudioInput>
#include <QtMultimedia/QAudio>

#include <wrl.h>

struct IAudioCaptureClient;
struct IAudioStreamVolume;

QT_BEGIN_NAMESPACE

class AudioInterface;
class WasapiInputDevicePrivate;
class QWasapiProcessThread;

Q_DECLARE_LOGGING_CATEGORY(lcMmAudioInput)

class QWasapiAudioInput : public QAbstractAudioInput
{
    Q_OBJECT
public:
    explicit QWasapiAudioInput(const QByteArray &device);
    ~QWasapiAudioInput();

    void start(QIODevice* device) override;
    QIODevice* start() override;
    void stop() override;
    void reset() override;
    void suspend() override;
    void resume() override;
    int bytesReady() const override;
    int periodSize() const override;
    void setBufferSize(int value) override;
    int bufferSize() const override;
    void setNotifyInterval(int milliSeconds) override;
    int notifyInterval() const override;
    qint64 processedUSecs() const override;
    qint64 elapsedUSecs() const override;
    QAudio::Error error() const override;
    QAudio::State state() const override;
    void setFormat(const QAudioFormat& fmt) override;
    QAudioFormat format() const override;
    void setVolume(qreal) override;
    qreal volume() const override;

    void process();
public slots:
    void processBuffer();
private:
    bool initStart(bool pull);
    friend class WasapiInputDevicePrivate;
    friend class WasapiInputPrivate;
    QByteArray m_deviceName;
    Microsoft::WRL::ComPtr<AudioInterface> m_interface;
    Microsoft::WRL::ComPtr<IAudioCaptureClient> m_capture;
    Microsoft::WRL::ComPtr<IAudioStreamVolume> m_volumeControl;
    qreal m_volumeCache;
    QMutex m_mutex;
    QAudio::State m_currentState;
    QAudio::Error m_currentError;
    QAudioFormat m_currentFormat;
    qint64 m_bytesProcessed;
    QTime m_openTime;
    int m_openTimeOffset;
    int m_interval;
    bool m_pullMode;
    quint32 m_bufferFrames;
    quint32 m_bufferBytes;
    HANDLE m_event;
    QWasapiProcessThread *m_eventThread;
    QAtomicInt m_processing;
    QIODevice *m_eventDevice;
};

QT_END_NAMESPACE

#endif