GPSStreamDemux.h

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#pragma once
 
#include <array>
#include <cstdint>
#include <memory>
#include <span>
#include <string_view>
 
#include <QtCore/QFlags>
#include <QtCore/QtGlobal>
 
enum class GPSFrameKind : uint8_t
{
    RTCM3 = 0x01,         
    UBX = 0x02,           
    SBF = 0x04,           
    NMEASentence = 0x08,  
    ASCIILine = 0x10,     
};
Q_DECLARE_FLAGS(GPSFrameKinds, GPSFrameKind)
Q_DECLARE_OPERATORS_FOR_FLAGS(GPSFrameKinds)
 
 
struct GPSFrame
{
    GPSFrameKind kind = GPSFrameKind::ASCIILine;
    std::span<const uint8_t> bytes{};
    std::span<const uint8_t> payload{};
    uint32_t messageId = 0;
 
    [[nodiscard]] std::string_view text() const { return {reinterpret_cast<const char*>(bytes.data()), bytes.size()}; }
};
 
struct GPSStreamConfig
{
    GPSFrameKinds framers{};
    GPSFrameKinds enabled{};
    bool shareSBFSync = false;
};
 
class GPSStreamDemux
{
public:
    class Handler
    {
    public:
        virtual void frame(const GPSFrame& frame) = 0;
 
    protected:
        ~Handler() = default;
    };
 
    explicit GPSStreamDemux(const GPSStreamConfig& config);
    ~GPSStreamDemux();
 
    Q_DISABLE_COPY(GPSStreamDemux)
 
    void push(uint8_t byte, Handler& handler);
 
    void reset();
    void reset(GPSFrameKind kind);
 
    void setEnabled(GPSFrameKind kind, bool enabled);
 
    class Framer;
 
private:
    static constexpr size_t FRAMER_COUNT = 5;
 
    std::array<std::unique_ptr<Framer>, FRAMER_COUNT> _framers;
};