ResampleLQ.hh

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#ifndef RESAMPLELQ_HH
#define RESAMPLELQ_HH
 
#include "ResampleAlgo.hh"
#include "FixedPoint.hh"
#include <array>
#include <memory>
 
namespace openmsx {
 
class DynamicClock;
class ResampledSoundDevice;
 
template<unsigned CHANNELS>
class ResampleLQ : public ResampleAlgo
{
public:
        static std::unique_ptr<ResampleLQ<CHANNELS>> create(
                ResampledSoundDevice& input, const DynamicClock& hostClock);
 
protected:
        ResampleLQ(ResampledSoundDevice& input, const DynamicClock& hostClock);
        [[nodiscard]] bool fetchData(EmuTime::param time, unsigned& valid);
 
protected:
        const DynamicClock& hostClock;
        using FP = FixedPoint<14>;
        const FP step;
        std::array<float, 2 * CHANNELS> lastInput;
};
 
template<unsigned CHANNELS>
class ResampleLQDown final : public ResampleLQ<CHANNELS>
{
public:
        ResampleLQDown(ResampledSoundDevice& input, const DynamicClock& hostClock);
private:
        bool generateOutputImpl(float* dataOut, size_t num,
                                EmuTime::param time) override;
        using FP = typename ResampleLQ<CHANNELS>::FP;
};
 
template<unsigned CHANNELS>
class ResampleLQUp final : public ResampleLQ<CHANNELS>
{
public:
        ResampleLQUp(ResampledSoundDevice& input, const DynamicClock& hostClock);
private:
        bool generateOutputImpl(float* dataOut, size_t num,
                                EmuTime::param time) override;
        using FP = typename ResampleLQ<CHANNELS>::FP;
};
 
} // namespace openmsx
 
#endif