audioinput.h Example File

multimedia/audioinput/audioinput.h
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#ifndef AUDIOINPUT_H #define AUDIOINPUT_H #include <QAudioInput> #include <QByteArray> #include <QComboBox> #include <QMainWindow> #include <QObject> #include <QPixmap> #include <QPushButton> #include <QSlider> #include <QWidget> class AudioInfo : public QIODevice { Q_OBJECT public: AudioInfo(const QAudioFormat &format, QObject *parent); ~AudioInfo(); void start(); void stop(); qreal level() const { return m_level; } qint64 readData(char *data, qint64 maxlen) override; qint64 writeData(const char *data, qint64 len) override; private: const QAudioFormat m_format; quint32 m_maxAmplitude; qreal m_level; // 0.0 <= m_level <= 1.0 signals: void update(); }; class RenderArea : public QWidget { Q_OBJECT public: RenderArea(QWidget *parent = 0); void setLevel(qreal value); protected: void paintEvent(QPaintEvent *event) override; private: qreal m_level; QPixmap m_pixmap; }; class InputTest : public QMainWindow { Q_OBJECT public: InputTest(); ~InputTest(); private: void initializeWindow(); void initializeAudio(); void createAudioInput(); private slots: void refreshDisplay(); void readMore(); void toggleMode(); void toggleSuspend(); void deviceChanged(int index); void sliderChanged(int value); private: // Owned by layout RenderArea *m_canvas; QPushButton *m_modeButton; QPushButton *m_suspendResumeButton; QComboBox *m_deviceBox; QSlider *m_volumeSlider; QAudioDeviceInfo m_device; AudioInfo *m_audioInfo; QAudioFormat m_format; QAudioInput *m_audioInput; QIODevice *m_input; bool m_pullMode; QByteArray m_buffer; }; #endif // AUDIOINPUT_H