SCC.hh

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#ifndef SCC_HH
#define SCC_HH

#include "ResampledSoundDevice.hh"
#include "SimpleDebuggable.hh"
#include "Clock.hh"
#include "openmsx.hh"

namespace openmsx {

class SCC final : public ResampledSoundDevice
{
public:
        enum ChipMode {SCC_Real, SCC_Compatible, SCC_plusmode};

        SCC(const std::string& name, const DeviceConfig& config,
            EmuTime::param time, ChipMode mode = SCC_Real);
        ~SCC();

        // interaction with realCartridge
        void powerUp(EmuTime::param time);
        void reset(EmuTime::param time);
        byte readMem(byte address,EmuTime::param time);
        byte peekMem(byte address,EmuTime::param time) const;
        void writeMem(byte address, byte value, EmuTime::param time);
        void setChipMode(ChipMode newMode);

        template<typename Archive>
        void serialize(Archive& ar, unsigned version);

private:
        // SoundDevice
        float getAmplificationFactorImpl() const override;
        void generateChannels(float** bufs, unsigned num) override;

        inline float adjust(signed char wav, byte vol);
        byte readWave(unsigned channel, unsigned address, EmuTime::param time) const;
        void writeWave(unsigned channel, unsigned address, byte value);
        void setDeformReg(byte value, EmuTime::param time);
        void setDeformRegHelper(byte value);
        void setFreqVol(unsigned address, byte value, EmuTime::param time);
        byte getFreqVol(unsigned address) const;

        static const int CLOCK_FREQ = 3579545;

        struct Debuggable final : SimpleDebuggable {
                Debuggable(MSXMotherBoard& motherBoard, const std::string& name);
                byte read(unsigned address, EmuTime::param time) override;
                void write(unsigned address, byte value, EmuTime::param time) override;
        } debuggable;

        Clock<CLOCK_FREQ> deformTimer;
        ChipMode currentChipMode;

        signed char wave[5][32];
        float volAdjustedWave[5][32]; // ints stored as floats, see comment in adjust()
        unsigned incr[5];
        unsigned count[5];
        unsigned pos[5];
        unsigned period[5];
        unsigned orgPeriod[5];
        float out[5]; // ints stored as floats
        byte volume[5];
        byte ch_enable;

        byte deformValue;
        bool rotate[5];
        bool readOnly[5];
};

} // namespace openmsx

#endif