发布 | 音量控制器

class VolumeController
{public:
    explicit VolumeController();
    virtual ~VolumeController();

    int getSpeakerVolume();
    bool setSpeakerVolume(int volumePercent);

    bool isSpeakerMuted();
    bool setSpeakerMuted(bool mute);

    int getMicVolume();
    bool setMicVolume(int volumePercent);

    bool isMicMuted();
    bool setMicMuted(bool mute);

private:
    IAudioEndpointVolume* getEndpointVolume(bool isSpeaker);

private:
    IAudioEndpointVolume *m_speakerEndpointVolume;
    IAudioEndpointVolume *m_micEndpointVolume;
};

connect(&m_updateTimer, SIGNAL(timeout()), this, SLOT(onUpdate()));
m_updateTimer.start(500);

void onUpdate()
{
    int micVolume     = m_volumeController->getMicVolume();
    int speakerVolume = m_volumeController->getSpeakerVolume();

    ui->horizontalSlider->setValue(micVolume);
    ui->horizontalSlider_2->setValue(speakerVolume);

    ui->label_2->setText(QString::fromLocal8Bit("录音音量：(%1%)").arg(micVolume));
    ui->label_3->setText(QString::fromLocal8Bit("扬声器音量：(%1%)").arg(speakerVolume));
}

void on_horizontalSlider_valueChanged(int value)
{
    qDebug() << "Set mic volume: " << value
             << "; Result: " << m_volumeController->setMicVolume(value);
}

void on_horizontalSlider_2_valueChanged(int value)
{
    qDebug() << "Set speaker voluem: " << value
             << "; Result: " << m_volumeController->setSpeakerVolume(value);
}