mirror of https://github.com/bsnes-emu/bsnes.git
71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
struct APU : Thread {
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APU();
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static auto Main() -> void;
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auto main() -> void;
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auto tick() -> void;
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auto set_irq_line() -> void;
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auto set_sample(int16 sample) -> void;
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auto power() -> void;
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auto reset() -> void;
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auto read(uint16 addr) -> uint8;
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auto write(uint16 addr, uint8 data) -> void;
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auto serialize(serializer&) -> void;
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struct Filter {
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auto run_hipass_strong(int sample) -> int;
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auto run_hipass_weak(int sample) -> int;
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auto run_lopass(int sample) -> int;
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auto serialize(serializer&) -> void;
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enum : int { HiPassStrong = 225574, HiPassWeak = 57593, LoPass = 86322413 };
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int64 hipass_strong;
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int64 hipass_weak;
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int64 lopass;
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};
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#include "envelope.hpp"
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#include "sweep.hpp"
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#include "pulse.hpp"
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#include "triangle.hpp"
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#include "noise.hpp"
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#include "dmc.hpp"
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struct FrameCounter {
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auto serialize(serializer&) -> void;
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enum : uint { NtscPeriod = 14915 }; //~(21.477MHz / 6 / 240hz)
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bool irq_pending;
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uint2 mode;
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uint2 counter;
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int divider;
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};
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auto clock_frame_counter() -> void;
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auto clock_frame_counter_divider() -> void;
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Filter filter;
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FrameCounter frame;
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uint8 enabled_channels;
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int16 cartridge_sample;
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int16 pulse_dac[32];
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int16 dmc_triangle_noise_dac[128][16][16];
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static const uint8 length_counter_table[32];
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static const uint16 ntsc_dmc_period_table[16];
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static const uint16 pal_dmc_period_table[16];
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static const uint16 ntsc_noise_period_table[16];
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static const uint16 pal_noise_period_table[16];
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};
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extern APU apu;
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