mirror of
https://github.com/SourMesen/Mesen2.git
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929d4dcc20
-Super Mario Land 2 - Pops in menu are fixed by immediately updating APU output after a write -Perfect Dark - Low voice volume is fixed by having the correct output when the channels are disabled (but DAC is still enabled) -Daiku no Gen - Low voice volume is fixed by keeping square channel output to digital 0 (= analog 1) until its first tick after being enabled (the game does not let the channel tick at all while the voice sample is playing)
81 lines
1.8 KiB
C++
81 lines
1.8 KiB
C++
#pragma once
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#include "pch.h"
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#include "Gameboy/APU/GbSquareChannel.h"
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#include "Gameboy/APU/GbWaveChannel.h"
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#include "Gameboy/APU/GbNoiseChannel.h"
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#include "Utilities/Audio/blip_buf.h"
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#include "Utilities/ISerializable.h"
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class Emulator;
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class Gameboy;
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class SoundMixer;
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class EmuSettings;
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struct GameboyConfig;
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class GbApu : public ISerializable
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{
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public:
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static constexpr int SampleRate = 96000;
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private:
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static constexpr int ApuFrequency = 1024 * 1024 * 4; //4mhz
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static constexpr int MaxSamples = 4000;
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Emulator* _emu = nullptr;
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Gameboy* _gameboy = nullptr;
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EmuSettings* _settings = nullptr;
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SoundMixer* _soundMixer = nullptr;
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unique_ptr<GbSquareChannel> _square1;
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unique_ptr<GbSquareChannel> _square2;
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unique_ptr<GbWaveChannel> _wave;
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unique_ptr<GbNoiseChannel> _noise;
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int16_t* _soundBuffer = nullptr;
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blip_t* _leftChannel = nullptr;
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blip_t* _rightChannel = nullptr;
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int16_t _prevLeftOutput = 0;
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int16_t _prevRightOutput = 0;
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uint32_t _clockCounter = 0;
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uint64_t _prevClockCount = 0;
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uint32_t _skipFirstEventCounter = 0;
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uint64_t _powerOnCycle = 0;
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GbApuState _state = {};
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uint8_t InternalRead(uint16_t addr);
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uint8_t InternalReadCgbRegister(uint16_t addr);
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void UpdateOutput(GameboyConfig& cfg);
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public:
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GbApu();
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virtual ~GbApu();
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void Init(Emulator* emu, Gameboy* gameboy);
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GbApuDebugState GetState();
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bool IsOddApuCycle();
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uint64_t GetElapsedApuCycles();
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void Run();
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void PlayQueuedAudio();
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void GetSoundSamples(int16_t* &samples, uint32_t& sampleCount);
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void ClockFrameSequencer();
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uint8_t Peek(uint16_t addr);
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uint8_t Read(uint16_t addr);
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void Write(uint16_t addr, uint8_t value);
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uint8_t PeekCgbRegister(uint16_t addr);
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uint8_t ReadCgbRegister(uint16_t addr);
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template<typename T> void ProcessLengthEnableFlag(uint8_t value, T& length, bool& lengthEnabled, bool& enabled);
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void Serialize(Serializer& s) override;
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};
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