382 lines
10 KiB
C++
382 lines
10 KiB
C++
#include "Hiopl.h"
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#include <assert.h>
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#include "JuceHeader.h"
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// A wrapper around the DOSBox and ZDoom OPL emulators.
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Hiopl::Hiopl(int buflen, Emulator emulator) {
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captureHandle = NULL;
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StopCapture();
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adlib = new DBOPL::Handler();
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zdoom = JavaOPLCreate(false);
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_op1offset[1] = 0x0;
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_op1offset[2] = 0x1;
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_op1offset[3] = 0x2;
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_op1offset[4] = 0x8;
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_op1offset[5] = 0x9;
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_op1offset[6] = 0xa;
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_op1offset[7] = 0x10;
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_op1offset[8] = 0x11;
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_op1offset[9] = 0x12;
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_op2offset[1] = 0x3;
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_op2offset[2] = 0x4;
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_op2offset[3] = 0x5;
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_op2offset[4] = 0xb;
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_op2offset[5] = 0xc;
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_op2offset[6] = 0xd;
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_op2offset[7] = 0x13;
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_op2offset[8] = 0x14;
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_op2offset[9] = 0x15;
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SetEmulator(emulator);
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_ClearRegisters();
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}
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void Hiopl::_ClearRegisters() {
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for (int i = 0; i < 256; i++) {
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_WriteReg(i, 0);
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}
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}
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void Hiopl::SetEmulator(Emulator emulator) {
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this->emulator = emulator;
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}
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void Hiopl::Generate(int length, float* buffer) {
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// This would be better done using Juce's built in audio format conversion.
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if (DOSBOX == emulator) {
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Bit32s* buf32 = new Bit32s[length];
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adlib->Generate(length, buf32);
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for (int i = 0; i < length; i++) {
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// The magic divisor is tuned to match to ZDoom output amplitude.
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buffer[i] = (float)(buf32[i])/8200.0f;
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}
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delete buf32;
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} else if (ZDOOM == emulator) {
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// ZDoom hacked to write mono samples
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zdoom->Update(buffer, length);
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}
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}
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void Hiopl::SetSampleRate(int hz) {
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adlib->Init(hz);
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}
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void Hiopl::_WriteReg(Bit32u reg, Bit8u value, Bit8u mask) {
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if (mask > 0) {
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value = (regCache[reg] & (~mask)) | (value & mask);
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}
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// Write to the registers of both emulators.
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//if (DOSBOX == emulator) {
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adlib->WriteReg(reg, value);
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//} else if (ZDOOM == emulator) {
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zdoom->WriteReg(reg, value);
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//}
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regCache[reg] = value;
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_CaptureRegWriteWithDelay(reg, value);
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}
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void Hiopl::_ClearRegBits(Bit32u reg, Bit8u mask) {
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_WriteReg(reg, regCache[reg] & ~mask);
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}
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void Hiopl::EnableWaveformControl() {
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_WriteReg(0x01, 0x20);
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}
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void Hiopl::SetWaveform(int ch, int osc, Waveform wave) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0xe0+offset, (Bit8u)wave, 0x7);
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}
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void Hiopl::SetAttenuation(int ch, int osc, int level) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x40+offset, (Bit8u)level, 0x3f);
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}
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void Hiopl::SetKsl(int ch, int osc, int level) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x40+offset, (Bit8u)(level<<6), 0xc0);
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}
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void Hiopl::SetFrequencyMultiple(int ch, int osc, FreqMultiple mult) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x20+offset, (Bit8u)mult, 0xf);
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}
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void Hiopl::SetEnvelopeAttack(int ch, int osc, int t) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x60+offset, (Bit8u)t<<4, 0xf0);
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}
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void Hiopl::SetEnvelopeDecay(int ch, int osc, int t) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x60+offset, (Bit8u)t, 0x0f);
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}
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void Hiopl::SetEnvelopeSustain(int ch, int osc, int level) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x80+offset, (Bit8u)level<<4, 0xf0);
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}
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void Hiopl::SetEnvelopeRelease(int ch, int osc, int t) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x80+offset, (Bit8u)t, 0x0f);
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}
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void Hiopl::EnableTremolo(int ch, int osc, bool enable) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x20+offset, enable ? 0x80 : 0x0, 0x80);
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}
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void Hiopl::EnableVibrato(int ch, int osc, bool enable) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x20+offset, enable ? 0x40 : 0x0, 0x40);
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}
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void Hiopl::TremoloDepth(bool high) {
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_WriteReg(0xbd, high ? 0x80 : 0x0, 0x80);
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}
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void Hiopl::VibratoDepth(bool high) {
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_WriteReg(0xbd, high ? 0x40 : 0x0, 0x40);
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}
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void Hiopl::EnableSustain(int ch, int osc, bool enable) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x20+offset, enable ? 0x20 : 0x0, 0x20);
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}
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void Hiopl::EnableKsr(int ch, int osc, bool enable) {
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int offset = this->_GetOffset(ch, osc);
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_WriteReg(0x20+offset, enable ? 0x10 : 0x0, 0x10);
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}
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void Hiopl::EnableAdditiveSynthesis(int ch, bool enable) {
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int offset = this->_GetOffset(ch);
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_WriteReg(0xc0+offset, enable ? 0x1 : 0x0, 0x1);
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}
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void Hiopl::SetModulatorFeedback(int ch, int level) {
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int offset = this->_GetOffset(ch);
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_WriteReg(0xc0+offset, (Bit8u)level, 0x0e);
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}
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void Hiopl::KeyOn(int ch, float frqHz) {
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Hiopl::SetFrequency(ch, frqHz, true);
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}
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void Hiopl::KeyOff(int ch) {
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int offset = this->_GetOffset(ch);
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_ClearRegBits(0xb0+offset, 0x20);
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}
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void Hiopl::SetFrequency(int ch, float frqHz, bool keyOn) {
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unsigned int fnum, block;
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int offset = this->_GetOffset(ch);
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// ZDoom emulator seems to be tuned down by two semitones for some reason.
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if (ZDOOM == emulator) {
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frqHz *= 1.122461363636364f;
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}
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_milliHertzToFnum((unsigned int)(frqHz * 1000.0), &fnum, &block);
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_WriteReg(0xa0+offset, fnum % 0x100);
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uint8 trig = (regCache[0xb0+offset] & 0x20) | (keyOn ? 0x20 : 0x00);
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_WriteReg(0xb0+offset, trig|((block&0x7)<<2)|(0x3&(fnum/0x100)));
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}
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// from libgamemusic, opl-util.cpp
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void Hiopl::_milliHertzToFnum(unsigned int milliHertz,
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unsigned int *fnum, unsigned int *block, unsigned int conversionFactor)
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{
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// Special case to avoid divide by zero
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if (milliHertz == 0) {
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*block = 0; // actually any block will work
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*fnum = 0;
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return;
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}
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// Special case for frequencies too high to produce
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if (milliHertz > 6208431) {
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*block = 7;
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*fnum = 1023;
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return;
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}
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// This is a bit more efficient and doesn't need log2() from math.h
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if (milliHertz > 3104215) *block = 7;
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else if (milliHertz > 1552107) *block = 6;
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else if (milliHertz > 776053) *block = 5;
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else if (milliHertz > 388026) *block = 4;
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else if (milliHertz > 194013) *block = 3;
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else if (milliHertz > 97006) *block = 2;
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else if (milliHertz > 48503) *block = 1;
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else *block = 0;
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// Slightly more efficient version
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*fnum = (unsigned int)(((unsigned long long)milliHertz << (20 - *block)) / (conversionFactor * 1000.0) + 0.5);
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if ((*block == 7) && (*fnum > 1023)) {
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// frequency out of range, clipping to maximum value.
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*fnum = 1023;
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}
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assert(*block <= 7);
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assert(*fnum < 1024);
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return;
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}
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static Bit8u dro_header[]={
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'D','B','R','A', /* 0x00, Bit32u ID */
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'W','O','P','L', /* 0x04, Bit32u ID */
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0x0,0x00, /* 0x08, Bit16u version low */
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0x1,0x00, /* 0x09, Bit16u version high */
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0x0,0x0,0x0,0x0, /* 0x0c, Bit32u total milliseconds */
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0x0,0x0,0x0,0x0, /* 0x10, Bit32u total data */
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0x0,0x0,0x0,0x0 /* 0x14, Bit32u Type 0=opl2,1=opl3,2=dual-opl2 */
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};
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static Bit8u dro_opl3_enable[]={
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0x03, // switch to extended register bank
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0x05, // register 0x105
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0x01, // value 0x1
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0x02 // switch back to regular OPL2 registers
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};
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void Hiopl::StartCapture(const char* filepath) {
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if (NULL != captureHandle) {
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StopCapture();
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} else {
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lastWrite = -1;
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captureLengthBytes = 0;
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captureStart = Time::currentTimeMillis();
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captureHandle = fopen(filepath, "wb");
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fwrite(dro_header, 1, sizeof(dro_header), captureHandle);
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for (int i = 0; i <= 0xff; i++) {
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_CaptureRegWrite(i, 0);
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}
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//_CaptureRegWrite(0x1, 0x20);
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/*
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for (int ch = 1; ch <= CHANNELS; ch++) {
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int offset1 = this->_GetOffset(ch, 1);
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int offset2 = this->_GetOffset(ch, 2);
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int offset0 = this->_GetOffset(ch);
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_CaptureRegWrite(0x20 + offset1, regCache[0x20 + offset1]);
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_CaptureRegWrite(0x20 + offset2, regCache[0x20 + offset2]);
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_CaptureRegWrite(0x40 + offset1, regCache[0x40 + offset1]);
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_CaptureRegWrite(0x40 + offset2, regCache[0x40 + offset2]);
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_CaptureRegWrite(0x60 + offset1, regCache[0x60 + offset1]);
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_CaptureRegWrite(0x60 + offset2, regCache[0x60 + offset2]);
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_CaptureRegWrite(0x80 + offset1, regCache[0x80 + offset1]);
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_CaptureRegWrite(0x80 + offset2, regCache[0x80 + offset2]);
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_CaptureRegWrite(0xe0 + offset1, regCache[0xe0 + offset1]);
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_CaptureRegWrite(0xe0 + offset2, regCache[0xe0 + offset2]);
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_CaptureRegWrite(0xc0 + offset0, regCache[0xc0 + offset0]);
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}
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*/
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_CaptureOpl3Enable();
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for (Bit8u i = 0x20; i <= 0x35; i++) {
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_CaptureRegWrite(i, regCache[i]);
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}
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for (Bit8u i = 0x40; i <= 0x55; i++) {
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_CaptureRegWrite(i, regCache[i]);
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}
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for (Bit8u i = 0x60; i <= 0x75; i++) {
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_CaptureRegWrite(i, regCache[i]);
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}
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for (Bit8u i = 0x80; i <= 0x95; i++) {
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_CaptureRegWrite(i, regCache[i]);
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}
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_CaptureRegWrite(0xbd, regCache[0xbd]);
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for (Bit8u i = 0xc0; i <= 0xc8; i++) {
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_CaptureRegWrite(i, regCache[i] | 0x30); // enable L + R channels
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}
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for (Bit8u i = 0xe0; i <= 0xf5; i++) {
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_CaptureRegWrite(i, regCache[i]);
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}
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}
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}
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INLINE void host_writed(Bit8u *off, Bit32u val) {
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off[0]=(Bit8u)(val);
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off[1]=(Bit8u)(val >> 8);
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off[2]=(Bit8u)(val >> 16);
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off[3]=(Bit8u)(val >> 24);
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};
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void Hiopl::StopCapture() {
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if (NULL != captureHandle) {
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Bit32u lengthMilliseconds = (Bit32u)(3000 + Time::currentTimeMillis() - captureStart);
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host_writed(&dro_header[0x0c], lengthMilliseconds);
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host_writed(&dro_header[0x10], captureLengthBytes);
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//if (opl.raw.opl3 && opl.raw.dualopl2) host_writed(&dro_header[0x14],0x1);
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//else if (opl.raw.dualopl2) host_writed(&dro_header[0x14],0x2);
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//else host_writed(&dro_header[0x14],0x0);
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host_writed(&dro_header[0x14], 0x1); // OPL3
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fseek(captureHandle, 0, 0);
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fwrite(dro_header, 1, sizeof(dro_header), captureHandle);
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fclose(captureHandle);
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}
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captureHandle = NULL;
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captureLengthBytes = 0;
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lastWrite = -1;
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captureStart = -1;
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}
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void Hiopl::_CaptureDelay(Bit16u delayMs) {
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Bit8u delay[3];
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delay[0] = 0x01;
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delay[1] = delayMs & 0xff;
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delay[2] = (delayMs >> 8) & 0xff;
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fwrite(delay, 1, 3, captureHandle);
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captureLengthBytes += 3;
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}
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void Hiopl::_CaptureRegWrite(Bit32u reg, Bit8u value) {
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if (reg <= 0x4) {
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Bit8u escape = 0x4;
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fwrite(&escape, 1, 1, captureHandle);
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captureLengthBytes += 1;
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}
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Bit8u regAndVal[2];
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regAndVal[0] = (Bit8u)reg;
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regAndVal[1] = value;
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fwrite(regAndVal, 1, 2, captureHandle);
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captureLengthBytes += 2;
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}
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void Hiopl::_CaptureRegWriteWithDelay(Bit32u reg, Bit8u value) {
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if (NULL != captureHandle) {
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Bit64s t = Time::currentTimeMillis();
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if (lastWrite >= 0) {
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// Delays of over 65 seconds will be truncated, but that kind of delay is a bit silly anyway..
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_CaptureDelay((Bit16u)(t - lastWrite));
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}
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_CaptureRegWrite(reg, value);
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lastWrite = t;
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}
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}
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void Hiopl::_CaptureOpl3Enable() {
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fwrite(dro_opl3_enable, 1, 4, captureHandle);
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captureLengthBytes += 4;
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}
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Hiopl::~Hiopl() {
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};
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bool Hiopl::_CheckParams(int ch, int osc=OSCILLATORS) {
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return ch > 0 && ch <= CHANNELS && osc > 0 && osc <= OSCILLATORS;
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}
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int Hiopl::_GetOffset(int ch, int osc) {
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assert(_CheckParams(ch, osc));
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return (1 == osc) ? _op1offset[ch] : _op2offset[ch];
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}
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int Hiopl::_GetOffset(int ch) {
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assert(_CheckParams(ch));
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return ch - 1;
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}
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