audio_player.h

Go to the documentation of this file.

#ifndef INLINE_AUDIO_PLAYER_H
#define INLINE_AUDIO_PLAYER_H
 
#include <QLabel>
#include <QPropertyAnimation>
 
class AudioDecoder;
class CyberAudioSlider;
class CyberAudioButton;
class TranslationManager;

class AudioPlayer final : public QFrame {
    Q_OBJECT
    Q_PROPERTY(double scanlineOpacity READ GetScanlineOpacity WRITE SetScanlineOpacity)
    Q_PROPERTY(double spectrumIntensity READ GetSpectrumIntensity WRITE SetSpectrumIntensity)
 
public:
    explicit AudioPlayer(const QByteArray &audio_data, const QString &mime_type, QWidget *parent = nullptr);

    double GetScanlineOpacity() const { return scanline_opacity_; }

    void SetScanlineOpacity(const double opacity) {
        scanline_opacity_ = opacity;
        update();
    }

    double GetSpectrumIntensity() const { return spectrum_intensity_; }

    void SetSpectrumIntensity(const double intensity) {
        spectrum_intensity_ = intensity;
        update();
    }

    ~AudioPlayer() override {
        ReleaseResources();
    }

    void ReleaseResources();

    void Activate();

    void Deactivate();

    void AdjustVolume(int volume) const;

    void ToggleMute();

    void UpdateVolumeIcon(float volume) const;
 
protected:
    void paintEvent(QPaintEvent *event) override;

    bool eventFilter(QObject *watched, QEvent *event) override;
 
private slots:
    void OnSliderPressed();

    void OnSliderReleased();

    void UpdateTimeLabel(int position);

    void UpdateSliderPosition(double position) const;

    void SeekAudio(int position) const;

    void TogglePlayback();

    void HandleError(const QString &message) const;

    void HandleAudioInfo(int sample_rate, int channels, double duration);

    void UpdateUI();

    void IncreaseSpectrumIntensity() {
        const auto spectrum_animation = new QPropertyAnimation(this, "spectrumIntensity");
        spectrum_animation->setDuration(600);
        spectrum_animation->setStartValue(spectrum_intensity_);
        spectrum_animation->setEndValue(0.6);
        spectrum_animation->setEasingCurve(QEasingCurve::OutCubic);
        spectrum_animation->start(QPropertyAnimation::DeleteWhenStopped);
    }

    void DecreaseSpectrumIntensity() {
        const auto spectrum_animation = new QPropertyAnimation(this, "spectrumIntensity");
        spectrum_animation->setDuration(800);
        spectrum_animation->setStartValue(spectrum_intensity_);
        spectrum_animation->setEndValue(0.2);
        spectrum_animation->setEasingCurve(QEasingCurve::OutCubic);
        spectrum_animation->start(QPropertyAnimation::DeleteWhenStopped);
    }
 
private:
    void PaintSpectrum(QWidget *target);

    QLabel *audio_info_label_;
    QLabel *status_label_;
    QWidget *spectrum_view_;
    CyberAudioButton *play_button_;
    CyberAudioSlider *progress_slider_;
    QLabel *time_label_;
    CyberAudioButton *volume_button_;
    CyberAudioSlider *volume_slider_;

    std::shared_ptr<AudioDecoder> decoder_;
    QTimer *ui_timer_;
    QTimer *spectrum_timer_;

    QByteArray m_audioData;
    QString mime_type_;

    double audio_duration_ = 0;
    double current_position_ = 0;
    bool slider_dragging_ = false;
    int last_volume_ = 100;
    bool playback_finished_ = false;
    bool was_playing_ = false;
    bool is_active_ = false;

    double scanline_opacity_;
    double spectrum_intensity_;
    QVector<double> spectrum_data_;

    static inline AudioPlayer *active_player_ = nullptr;

    TranslationManager *translator_;
};
 
#endif //INLINE_AUDIO_PLAYER_H