VLM5030.hh

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#ifndef VLM5030_HH
#define VLM5030_HH
 
#include "ResampledSoundDevice.hh"
 
#include "EmuTime.hh"
#include "Rom.hh"
 
#include <array>
#include <cstdint>
#include <string>
 
namespace openmsx {
 
class DeviceConfig;
 
class VLM5030 final : public ResampledSoundDevice
{
public:
        VLM5030(const std::string& name, static_string_view desc,
                std::string_view romFilename, const DeviceConfig& config);
        ~VLM5030();
        void reset();
 
        void writeData(uint8_t data);
 
        void writeControl(uint8_t data, EmuTime::param time);
 
        [[nodiscard]] bool getBSY(EmuTime::param time) const;
 
        template<typename Archive>
        void serialize(Archive& ar, unsigned version);
 
private:
        void setRST(bool pin);
        void setVCU(bool pin);
        void setST (bool pin);
 
        // SoundDevice
        void generateChannels(std::span<float*> bufs, unsigned num) override;
        [[nodiscard]] float getAmplificationFactorImpl() const override;
 
        void setupParameter(uint8_t param);
        [[nodiscard]] unsigned getBits(unsigned sBit, unsigned bits) const;
        [[nodiscard]] int parseFrame();
 
private:
        Rom rom;
        unsigned address_mask;
 
        // state of option parameter
        uint8_t frame_size;
        int pitch_offset;
 
        // these contain data describing the current and previous voice frames
        // these are all used to contain the current state of the sound generation
        unsigned current_energy;
        unsigned current_pitch;
        std::array<int, 10> current_k;
        std::array<int, 10> x;
 
        uint16_t address;
        uint16_t vcu_addr_h;
 
        std::array<int16_t, 10> old_k;
        std::array<int16_t, 10> new_k;
        std::array<int16_t, 10> target_k;
        uint16_t old_energy;
        uint16_t new_energy;
        uint16_t target_energy;
        uint8_t old_pitch;
        uint8_t new_pitch;
        uint8_t target_pitch;
 
        uint8_t interp_step;
        uint8_t interp_count; // number of interp periods
        uint8_t sample_count; // sample number within interp
        uint8_t pitch_count;
 
        uint8_t latch_data{0};
        uint8_t parameter;
        uint8_t phase;
        bool pin_BSY{false};
        bool pin_ST{false};
        bool pin_VCU{false};
        bool pin_RST{false};
};
 
} // namespace openmsx
 
#endif