96 lines
3.8 KiB
C++
96 lines
3.8 KiB
C++
#ifndef __JABYENGINE_SPU_IO_HPP__
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#define __JABYENGINE_SPU_IO_HPP__
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#include "IOPort.hpp"
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#include <limits.h>
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namespace SPU {
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namespace Port {
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enum struct SweepMode {
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Linear = 0,
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Exponential = 1,
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};
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enum struct SweepDirection {
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Increase = 0,
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Decrease = 1,
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};
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enum struct SweepPhase {
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Posititve = 0,
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Negative = 1,
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};
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//0..0x1F = Fast..Slow
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typedef uint8_t SweepShift;
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//0..3 = +7, +6, +5, +4 or -6, -7, -6, -5
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typedef uint8_t SweepStep;
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struct __no_align SampleRate : public IOPort<uint16_t> {
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__io_port_inherit(SampleRate);
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static constexpr SampleRate from_HZ(double freq) {
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//4096 == 44100Hz
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constexpr double Base = (4096.0 / 44100.0);
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return IOPort(static_cast<uint16_t>((freq*Base)));
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}
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};
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struct __no_align SweepVolume : public IOPort<int16_t> {
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__io_port_inherit(SweepVolume);
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// For Volume Mode
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static constexpr Bit<int16_t> ModeBit = 15; // 0 Volume Mode; 1 Sweep Mode
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static constexpr BitRange<int16_t> VolumeRange = BitRange<int16_t>::from_to(0, 14);
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// For Sweep Mode
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static constexpr Bit<SweepMode> SweepModeBit = 14;
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static constexpr Bit<SweepDirection> SweepDirectionBit = 13;
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static constexpr Bit<SweepPhase> SweepPhaseBit = 12;
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static constexpr BitRange<SweepShift> SweepShiftRange = BitRange<SweepShift>::from_to(2, 6);
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static constexpr BitRange<SweepStep> SweepStepRange = BitRange<SweepStep>::from_to(0, 1);
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};
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struct __no_align SR : public IOPort<uint16_t> {
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static constexpr Bit<SweepMode> SustainModeBit = (31 - 16);
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static constexpr Bit<SweepDirection> SustainDirectionBit = (30 - 16);
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static constexpr BitRange<SweepShift> SustainShiftRange = BitRange<SweepShift>::from_to((24 - 16), (28 - 16));
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static constexpr BitRange<SweepStep> SustainStepRange = BitRange<SweepStep>::from_to((22 - 16), (23 - 16));
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static constexpr Bit<SweepMode> ReleaseModeBit = (21 - 16);
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static constexpr BitRange<SweepShift> ReleaseShiftRange = BitRange<SweepShift>::from_to((16 - 16), (20 - 16));
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};
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struct __no_align AD : public IOPort<uint16_t> {
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static constexpr Bit<SweepMode> AttackModeBit = 15;
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static constexpr BitRange<SweepShift> AttackShiftRange = BitRange<SweepShift>::from_to(10, 14);
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static constexpr BitRange<SweepStep> AttackStepRange = BitRange<SweepStep>::from_to(8, 9);
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static constexpr BitRange<SweepShift> DecayShiftRange = BitRange<SweepShift>::from_to(4, 7);
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static constexpr BitRange<uint16_t> SustainLevelRange = BitRange<uint16_t>::from_to(0, 3);
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};
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struct __no_align Voice {
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SweepVolume volumeLeft;
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SweepVolume volumeRight;
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SampleRate sampleRate;
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IOPort<uint16_t> adr;
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IOPort<AD> ad;
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IOPort<SR> sr;
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IOPort<SweepVolume> currentVolume; //Not used
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IOPort<uint16_t> repeatAdr;
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};
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namespace Key {
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__declare_io_port_global(ubus32_t, on, 0x1F801D88);
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__declare_io_port_global(ubus32_t, off, 0x1F801D8C);
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__declare_io_port_global(ubus32_t, status, 0x1F801D9C);
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}
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namespace MainVolume {
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__declare_io_port_global(SweepVolume, left, 0x1F801D80);
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__declare_io_port_global(SweepVolume, right, 0x1F801D82);
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}
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}
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}
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#endif //!__JABYENGINE_SPU_IO_HPP__
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