xyseriesiodevice.h

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/****************************************************************************
** Original work Copyright (C) 2016 The Qt Company Ltd.
** Modified work Copyright (c) 2026 Patrik Källback
**
** This file is based on the Qt Charts examples but has been heavily 
** modified for the PS-80 GrandComp Analyzer project.
**
** @file xyseriesiodevice.h
** @brief Custom QIODevice for dual-mode audio playback and signal analysis.
** @author Patrik Källback
** @version 1.2
** @license SPDX-License-Identifier: MIT (for modifications)
** @date 2026-02-17
****************************************************************************/
 
#ifndef XYSERIESIODEVICE_H
#define XYSERIESIODEVICE_H
 
#include <QtCharts/QChartGlobal>
#include <QtCore/QIODevice>
#include <QtCore/QPointF>
#include <QtCore/QVector>
#include <vector>

class XYSeriesIODevice : public QIODevice
{
    Q_OBJECT
public:
    explicit XYSeriesIODevice(QObject *parent = nullptr);

    virtual ~XYSeriesIODevice() = default;

    XYSeriesIODevice(const XYSeriesIODevice &) = delete;

    XYSeriesIODevice &operator=(const XYSeriesIODevice &) = delete;

    void updateTable(const std::vector<float> &data);

    void setFrequency(float hz);

    qint64 readData(char *data, qint64 maxlen) override;

    qint64 writeData(const char * /*data*/, qint64 /*len*/) override { return 0; }

    bool isSequential() const override { return true; }

    enum class PlayMode {
        Waveform, 
        WavFile   
    };

    void setPlayMode(PlayMode mode);

    PlayMode getPlayMode() const { return m_currentMode; }

    float getCurrentPhase() const { return m_phase; }

    qint64 getCurrentWavIndex() const { return m_wavIndex; }
 
private:
    PlayMode m_currentMode = PlayMode::Waveform; 
    std::vector<float> m_table;                  
    float m_phase{0.0f};                         
    qint64 m_wavIndex{0};                        
    float m_increment{0.0f};            
    const float m_sampleRate{44100.0f}; 
};
 
#endif // XYSERIESIODEVICE_H