63 lines
1.1 KiB
C++
63 lines
1.1 KiB
C++
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#pragma once
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#include "stdafx.h"
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#include "APU.h"
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#include "CPU.h"
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void output_samples(const blip_sample_t*, size_t count);
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APU* APU::Instance = nullptr;
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IAudioDevice* APU::AudioDevice = nullptr;
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APU::APU()
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{
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blargg_err_t error = _buf.sample_rate(44100);
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if(error) {
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//report_error(error);
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}
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_buf.clock_rate(1789773);
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_apu.output(&_buf);
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_apu.dmc_reader(&APU::DMCRead);
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//_apu.irq_notifier(irq_changed);
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}
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int APU::DMCRead(void*, cpu_addr_t addr)
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{
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return APU::Instance->ReadRAM(addr);
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}
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uint8_t APU::ReadRAM(uint16_t addr)
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{
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switch(addr) {
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case 0x4015:
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return _apu.read_status(0);
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break;
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}
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return 0;
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}
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void APU::WriteRAM(uint16_t addr, uint8_t value)
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{
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_apu.write_register(0, addr, value);
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}
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void APU::Exec(uint32_t executedCycles)
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{
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_apu.end_frame(executedCycles);
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_buf.end_frame(executedCycles);
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// Read some samples out of Blip_Buffer if there are enough to
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// fill our output buffer
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const size_t out_size = 4096;
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blip_sample_t out_buf[out_size];
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if(_buf.samples_avail() >= out_size) {
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size_t count = _buf.read_samples(out_buf, out_size);
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APU::AudioDevice->PlayBuffer(out_buf, count * sizeof(blip_sample_t));
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}
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}
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