mirror of https://github.com/bsnes-emu/bsnes.git
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
#include <md/md.hpp>
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namespace MegaDrive {
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PSG psg;
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#include "io.cpp"
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#include "tone.cpp"
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#include "noise.cpp"
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#include "serialization.cpp"
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auto PSG::Enter() -> void {
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while(true) scheduler.synchronize(), psg.main();
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}
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auto PSG::main() -> void {
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tone0.run();
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tone1.run();
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tone2.run();
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noise.run();
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int output = 0;
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output += levels[tone0.volume] * tone0.output;
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output += levels[tone1.volume] * tone1.output;
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output += levels[tone2.volume] * tone2.output;
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output += levels[noise.volume] * noise.output;
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stream->sample(sclamp<16>(output) / 32768.0);
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step(16);
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}
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auto PSG::step(uint clocks) -> void {
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Thread::step(clocks);
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synchronize(cpu);
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synchronize(apu);
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}
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auto PSG::power() -> void {
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create(PSG::Enter, system.frequency() / 15.0);
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stream = Emulator::audio.createStream(1, frequency() / 16.0);
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stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::HighPass, 20.0);
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stream->addFilter(Emulator::Filter::Order::First, Emulator::Filter::Type::LowPass, 2840.0);
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stream->addFilter(Emulator::Filter::Order::Second, Emulator::Filter::Type::LowPass, 20000.0, 3);
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select = 0;
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for(auto n : range(15)) {
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levels[n] = 0x1400 * pow(2, n * -2.0 / 6.0) + 0.5;
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}
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levels[15] = 0;
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tone0.power();
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tone1.power();
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tone2.power();
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noise.power();
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}
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}
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