audiooutput.h Example File

multimedia/audiooutput/audiooutput.h
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#ifndef AUDIOOUTPUT_H #define AUDIOOUTPUT_H #include <math.h> #include <QAudioOutput> #include <QByteArray> #include <QComboBox> #include <QIODevice> #include <QLabel> #include <QMainWindow> #include <QObject> #include <QPushButton> #include <QSlider> #include <QTimer> class Generator : public QIODevice { Q_OBJECT public: Generator(const QAudioFormat &format, qint64 durationUs, int sampleRate, QObject *parent); ~Generator(); void start(); void stop(); qint64 readData(char *data, qint64 maxlen) override; qint64 writeData(const char *data, qint64 len) override; qint64 bytesAvailable() const override; private: void generateData(const QAudioFormat &format, qint64 durationUs, int sampleRate); private: qint64 m_pos; QByteArray m_buffer; }; class AudioTest : public QMainWindow { Q_OBJECT public: AudioTest(); ~AudioTest(); private: void initializeWindow(); void initializeAudio(); void createAudioOutput(); private: QTimer *m_pushTimer; // Owned by layout QPushButton *m_modeButton; QPushButton *m_suspendResumeButton; QComboBox *m_deviceBox; QLabel *m_volumeLabel; QSlider *m_volumeSlider; QAudioDeviceInfo m_device; Generator *m_generator; QAudioOutput *m_audioOutput; QIODevice *m_output; // not owned QAudioFormat m_format; bool m_pullMode; QByteArray m_buffer; private slots: void pushTimerExpired(); void toggleMode(); void toggleSuspendResume(); void deviceChanged(int index); void volumeChanged(int); }; #endif // AUDIOOUTPUT_H