61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#include "stdafx.h"
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#include "Spc.h"
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#include "SNES_SPC.h"
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#include "Console.h"
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#include "MemoryManager.h"
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#include "SoundMixer.h"
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#include "../Utilities/VirtualFile.h"
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Spc::Spc(shared_ptr<Console> console)
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{
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_console = console;
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vector<uint8_t> fileData;
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VirtualFile spcBios("spc700.rom");
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spcBios.ReadFile(fileData);
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memcpy(_spcBios, fileData.data(), 64);
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_soundBuffer = new int16_t[Spc::SampleBufferSize];
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_spc = new SNES_SPC();
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_spc->init();
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_spc->init_rom(_spcBios);
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_spc->reset();
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_spc->set_output(_soundBuffer, Spc::SampleBufferSize >> 1);
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_startFrameMasterClock = 0;
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}
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Spc::~Spc()
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{
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delete _spc;
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}
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int Spc::GetSpcTime()
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{
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uint64_t currentClock = _console->GetMemoryManager()->GetMasterClock();
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uint64_t elapsedClocks = currentClock - _startFrameMasterClock;
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return (int)(elapsedClocks * 1024000 / 21477000);
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}
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uint8_t Spc::Read(uint16_t addr)
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{
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return _spc->read_port(GetSpcTime(), addr & 0x03);
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}
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void Spc::Write(uint32_t addr, uint8_t value)
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{
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_spc->write_port(GetSpcTime(), addr & 0x03, value);
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}
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void Spc::ProcessEndFrame()
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{
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_spc->end_frame(GetSpcTime());
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int sampleCount = _spc->sample_count();
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_console->GetSoundMixer()->PlayAudioBuffer(_soundBuffer, sampleCount / 2);
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_spc->set_output(_soundBuffer, Spc::SampleBufferSize >> 1);
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uint64_t remainder = (_console->GetMemoryManager()->GetMasterClock() - _startFrameMasterClock) * 1024000 % 21477000 / 1024000;
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_startFrameMasterClock = _console->GetMemoryManager()->GetMasterClock() - remainder;
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}
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