65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "EmulationSettings.h"
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#include "../Utilities/LowPassFilter.h"
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#include "../BlipBuffer/blip_buf.h"
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#include "IAudioDevice.h"
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#include "Snapshotable.h"
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class SoundMixer : public Snapshotable
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{
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public:
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static const uint32_t CycleLength = 10000;
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static const uint32_t BitsPerSample = 16;
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private:
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static IAudioDevice* AudioDevice;
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static const uint32_t MaxSampleRate = 48000;
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static const uint32_t MaxSamplesPerFrame = MaxSampleRate / 60;
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static const uint32_t MaxChannelCount = 6;
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static const uint32_t ExpansionAudioIndex = MaxChannelCount - 1;
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AudioChannel _expansionAudioType;
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LowPassFilter _lowPassFilter;
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int16_t _previousOutput = 0;
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vector<uint32_t> _timestamps;
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int8_t _channelOutput[MaxChannelCount][CycleLength];
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int8_t _currentOutput[MaxChannelCount];
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int16_t _lupSquare[31];
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int16_t _lupTnd[203];
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blip_t* _blipBuf;
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int16_t *_outputBuffer;
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double _volumes[MaxChannelCount];
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uint32_t _sampleRate;
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uint32_t _clockRate;
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void InitializeLookupTables();
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int16_t GetOutputVolume();
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void EndFrame(uint32_t time);
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void UpdateRates();
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protected:
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virtual void StreamState(bool saving);
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public:
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SoundMixer();
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~SoundMixer();
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void SetNesModel(NesModel model);
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void Reset();
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void PlayAudioBuffer(uint32_t cycle);
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void AddDelta(AudioChannel channel, uint32_t time, int8_t delta);
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void SetExpansionAudioType(AudioChannel channel);
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void AddExpansionAudioDelta(uint32_t time, int8_t delta);
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static void StopAudio(bool clearBuffer = false);
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static void RegisterAudioDevice(IAudioDevice *audioDevice);
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};
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