mirror of
https://github.com/ZDoom/gzdoom-gles.git
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473 lines
14 KiB
C++
473 lines
14 KiB
C++
/*
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* libOPNMIDI is a free MIDI to WAV conversion library with OPN2 (YM2612) emulation
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*
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* MIDI parser and player (Original code from ADLMIDI): Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
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* OPNMIDI Library and YM2612 support: Copyright (c) 2017-2018 Vitaly Novichkov <admin@wohlnet.ru>
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*
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* Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation:
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* http://iki.fi/bisqwit/source/adlmidi.html
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "opnmidi_private.hpp"
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#if defined(OPNMIDI_DISABLE_NUKED_EMULATOR) && defined(OPNMIDI_DISABLE_MAME_EMULATOR) && \
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defined(OPNMIDI_DISABLE_GENS_EMULATOR) && defined(OPNMIDI_DISABLE_GX_EMULATOR)
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#error "No emulators enabled. You must enable at least one emulator to use this library!"
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#endif
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// Nuked OPN2 emulator, Most accurate, but requires the powerful CPU
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#ifndef OPNMIDI_DISABLE_NUKED_EMULATOR
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#include "chips/nuked_opn2.h"
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#endif
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// MAME YM2612 emulator, Well-accurate and fast
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#ifndef OPNMIDI_DISABLE_MAME_EMULATOR
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#include "chips/mame_opn2.h"
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#endif
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// GENS 2.10 emulator, very outdated and inaccurate, but gives the best performance
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#ifndef OPNMIDI_DISABLE_GENS_EMULATOR
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#include "chips/gens_opn2.h"
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#endif
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// Genesis Plus GX emulator, Variant of MAME with enhancements
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#ifndef OPNMIDI_DISABLE_GX_EMULATOR
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#include "chips/gx_opn2.h"
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#endif
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static const unsigned opn2_emulatorSupport = 0
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#ifndef OPNMIDI_DISABLE_NUKED_EMULATOR
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| (1u << OPNMIDI_EMU_NUKED)
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#endif
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#ifndef OPNMIDI_DISABLE_MAME_EMULATOR
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| (1u << OPNMIDI_EMU_MAME)
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#endif
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#ifndef OPNMIDI_DISABLE_GENS_EMULATOR
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| (1u << OPNMIDI_EMU_GENS)
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#endif
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#ifndef OPNMIDI_DISABLE_GX_EMULATOR
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| (1u << OPNMIDI_EMU_GX)
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#endif
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;
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//! Check emulator availability
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bool opn2_isEmulatorAvailable(int emulator)
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{
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return (opn2_emulatorSupport & (1u << (unsigned)emulator)) != 0;
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}
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//! Find highest emulator
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int opn2_getHighestEmulator()
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{
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int emu = -1;
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for(unsigned m = opn2_emulatorSupport; m > 0; m >>= 1)
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++emu;
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return emu;
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}
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//! Find lowest emulator
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int opn2_getLowestEmulator()
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{
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int emu = -1;
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unsigned m = opn2_emulatorSupport;
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if(m > 0)
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{
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for(emu = 0; (m & 1) == 0; m >>= 1)
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++emu;
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}
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return emu;
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}
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static const uint32_t g_noteChannelsMap[6] = { 0, 1, 2, 4, 5, 6 };
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static inline void getOpnChannel(size_t in_channel,
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size_t &out_chip,
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uint8_t &out_port,
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uint32_t &out_ch)
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{
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out_chip = in_channel / 6;
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size_t ch4 = in_channel % 6;
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out_port = ((ch4 < 3) ? 0 : 1);
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out_ch = static_cast<uint32_t>(ch4 % 3);
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}
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static opnInstMeta2 makeEmptyInstrument()
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{
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opnInstMeta2 ins;
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memset(&ins, 0, sizeof(opnInstMeta2));
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ins.flags = opnInstMeta::Flag_NoSound;
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return ins;
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}
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const opnInstMeta2 OPN2::m_emptyInstrument = makeEmptyInstrument();
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OPN2::OPN2() :
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m_regLFOSetup(0),
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m_numChips(1),
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m_scaleModulators(false),
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m_runAtPcmRate(false),
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m_softPanning(false),
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m_musicMode(MODE_MIDI),
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m_volumeScale(VOLUME_Generic),
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m_lfoEnable(false),
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m_lfoFrequency(0)
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{
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m_insBankSetup.volumeModel = OPN2::VOLUME_Generic;
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m_insBankSetup.lfoEnable = false;
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m_insBankSetup.lfoFrequency = 0;
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// Initialize blank instruments banks
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m_insBanks.clear();
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}
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OPN2::~OPN2()
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{
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clearChips();
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}
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bool OPN2::setupLocked()
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{
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return (m_musicMode == MODE_CMF ||
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m_musicMode == MODE_IMF ||
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m_musicMode == MODE_RSXX);
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}
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void OPN2::writeReg(size_t chip, uint8_t port, uint8_t index, uint8_t value)
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{
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m_chips[chip]->writeReg(port, index, value);
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}
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void OPN2::writeRegI(size_t chip, uint8_t port, uint32_t index, uint32_t value)
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{
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m_chips[chip]->writeReg(port, static_cast<uint8_t>(index), static_cast<uint8_t>(value));
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}
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void OPN2::writePan(size_t chip, uint32_t index, uint32_t value)
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{
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m_chips[chip]->writePan(static_cast<uint16_t>(index), static_cast<uint8_t>(value));
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}
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void OPN2::noteOff(size_t c)
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{
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size_t chip;
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uint8_t port;
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uint32_t cc;
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size_t ch4 = c % 6;
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getOpnChannel(c, chip, port, cc);
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writeRegI(chip, 0, 0x28, g_noteChannelsMap[ch4]);
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}
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void OPN2::noteOn(size_t c, double hertz) // Hertz range: 0..131071
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{
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size_t chip;
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uint8_t port;
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uint32_t cc;
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size_t ch4 = c % 6;
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getOpnChannel(c, chip, port, cc);
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if(hertz < 0) // Avoid infinite loop
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return;
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uint32_t octave = 0, ftone = 0, mul_offset = 0;
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const opnInstData &adli = m_insCache[c];
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//Basic range until max of octaves reaching
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while((hertz >= 1023.75) && (octave < 0x3800))
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{
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hertz /= 2.0; // Calculate octave
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octave += 0x800;
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}
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//Extended range, rely on frequency multiplication increment
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while(hertz >= 2036.75)
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{
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hertz /= 2.0; // Calculate octave
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mul_offset++;
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}
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ftone = octave + static_cast<uint32_t>(hertz + 0.5);
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for(size_t op = 0; op < 4; op++)
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{
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uint32_t reg = adli.OPS[op].data[0];
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uint16_t address = static_cast<uint16_t>(0x30 + (op * 4) + cc);
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if(mul_offset > 0) // Increase frequency multiplication value
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{
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uint32_t dt = reg & 0xF0;
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uint32_t mul = reg & 0x0F;
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if((mul + mul_offset) > 0x0F)
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{
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mul_offset = 0;
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mul = 0x0F;
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}
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writeRegI(chip, port, address, uint8_t(dt | (mul + mul_offset)));
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}
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else
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{
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writeRegI(chip, port, address, uint8_t(reg));
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}
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}
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writeRegI(chip, port, 0xA4 + cc, (ftone>>8) & 0xFF);//Set frequency and octave
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writeRegI(chip, port, 0xA0 + cc, ftone & 0xFF);
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writeRegI(chip, 0, 0x28, 0xF0 + g_noteChannelsMap[ch4]);
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}
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void OPN2::touchNote(size_t c, uint8_t volume, uint8_t brightness)
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{
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if(volume > 127) volume = 127;
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size_t chip;
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uint8_t port;
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uint32_t cc;
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getOpnChannel(c, chip, port, cc);
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const opnInstData &adli = m_insCache[c];
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uint8_t op_vol[4] =
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{
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adli.OPS[OPERATOR1].data[1],
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adli.OPS[OPERATOR2].data[1],
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adli.OPS[OPERATOR3].data[1],
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adli.OPS[OPERATOR4].data[1],
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};
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bool alg_do[8][4] =
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{
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/*
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* Yeah, Operator 2 and 3 are seems swapped
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* which we can see in the algorithm 4
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*/
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//OP1 OP3 OP2 OP4
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//30 34 38 3C
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{false,false,false,true},//Algorithm #0: W = 1 * 2 * 3 * 4
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{false,false,false,true},//Algorithm #1: W = (1 + 2) * 3 * 4
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{false,false,false,true},//Algorithm #2: W = (1 + (2 * 3)) * 4
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{false,false,false,true},//Algorithm #3: W = ((1 * 2) + 3) * 4
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{false,false,true, true},//Algorithm #4: W = (1 * 2) + (3 * 4)
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{false,true ,true ,true},//Algorithm #5: W = (1 * (2 + 3 + 4)
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{false,true ,true ,true},//Algorithm #6: W = (1 * 2) + 3 + 4
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{true ,true ,true ,true},//Algorithm #7: W = 1 + 2 + 3 + 4
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};
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uint8_t alg = adli.fbalg & 0x07;
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for(uint8_t op = 0; op < 4; op++)
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{
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bool do_op = alg_do[alg][op] || m_scaleModulators;
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uint32_t x = op_vol[op];
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uint32_t vol_res = do_op ? (127 - (static_cast<uint32_t>(volume) * (127 - (x & 127)))/127) : x;
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if(brightness != 127)
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{
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brightness = static_cast<uint32_t>(::round(127.0 * ::sqrt((static_cast<double>(brightness)) * (1.0 / 127.0))));
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if(!do_op)
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vol_res = (127 - (brightness * (127 - (static_cast<uint32_t>(vol_res) & 127))) / 127);
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}
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writeRegI(chip, port, 0x40 + cc + (4 * op), vol_res);
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}
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// Correct formula (ST3, AdPlug):
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// 63-((63-(instrvol))/63)*chanvol
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// Reduces to (tested identical):
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// 63 - chanvol + chanvol*instrvol/63
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// Also (slower, floats):
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// 63 + chanvol * (instrvol / 63.0 - 1)
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}
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void OPN2::setPatch(size_t c, const opnInstData &instrument)
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{
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size_t chip;
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uint8_t port;
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uint32_t cc;
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getOpnChannel(c, chip, port, cc);
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m_insCache[c] = instrument;
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for(uint8_t d = 0; d < 7; d++)
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{
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for(uint8_t op = 0; op < 4; op++)
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writeRegI(chip, port, 0x30 + (0x10 * d) + (op * 4) + cc, instrument.OPS[op].data[d]);
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}
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writeRegI(chip, port, 0xB0 + cc, instrument.fbalg);//Feedback/Algorithm
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m_regLFOSens[c] = (m_regLFOSens[c] & 0xC0) | (instrument.lfosens & 0x3F);
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writeRegI(chip, port, 0xB4 + cc, m_regLFOSens[c]);//Panorame and LFO bits
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}
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void OPN2::setPan(size_t c, uint8_t value)
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{
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size_t chip;
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uint8_t port;
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uint32_t cc;
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getOpnChannel(c, chip, port, cc);
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const opnInstData &adli = m_insCache[c];
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uint8_t val = 0;
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if(m_softPanning)
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{
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val = (OPN_PANNING_BOTH & 0xC0) | (adli.lfosens & 0x3F);
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writePan(chip, c % 6, value);
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writeRegI(chip, port, 0xB4 + cc, val);
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}
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else
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{
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int panning = 0;
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if(value < 64 + 32) panning |= OPN_PANNING_LEFT;
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if(value >= 64 - 32) panning |= OPN_PANNING_RIGHT;
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val = (panning & 0xC0) | (adli.lfosens & 0x3F);
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writePan(chip, c % 6, 64);
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writeRegI(chip, port, 0xB4 + cc, val);
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}
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m_regLFOSens[c] = val;
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}
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void OPN2::silenceAll() // Silence all OPL channels.
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{
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for(size_t c = 0; c < m_numChannels; ++c)
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{
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noteOff(c);
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touchNote(c, 0);
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}
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}
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void OPN2::commitLFOSetup()
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{
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uint8_t regLFOSetup = (m_lfoEnable ? 8 : 0) | (m_lfoFrequency & 7);
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m_regLFOSetup = regLFOSetup;
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for(size_t chip = 0; chip < m_numChips; ++chip)
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writeReg(chip, 0, 0x22, regLFOSetup);
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}
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void OPN2::setVolumeScaleModel(OPNMIDI_VolumeModels volumeModel)
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{
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switch(volumeModel)
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{
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case OPNMIDI_VolumeModel_AUTO://Do nothing until restart playing
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break;
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case OPNMIDI_VolumeModel_Generic:
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m_volumeScale = OPN2::VOLUME_Generic;
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break;
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case OPNMIDI_VolumeModel_NativeOPN2:
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m_volumeScale = OPN2::VOLUME_NATIVE;
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break;
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case OPNMIDI_VolumeModel_DMX:
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m_volumeScale = OPN2::VOLUME_DMX;
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break;
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case OPNMIDI_VolumeModel_APOGEE:
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m_volumeScale = OPN2::VOLUME_APOGEE;
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break;
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case OPNMIDI_VolumeModel_9X:
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m_volumeScale = OPN2::VOLUME_9X;
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break;
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}
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}
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OPNMIDI_VolumeModels OPN2::getVolumeScaleModel()
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{
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switch(m_volumeScale)
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{
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default:
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case OPN2::VOLUME_Generic:
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return OPNMIDI_VolumeModel_Generic;
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case OPN2::VOLUME_NATIVE:
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return OPNMIDI_VolumeModel_NativeOPN2;
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case OPN2::VOLUME_DMX:
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return OPNMIDI_VolumeModel_DMX;
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case OPN2::VOLUME_APOGEE:
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return OPNMIDI_VolumeModel_APOGEE;
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case OPN2::VOLUME_9X:
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return OPNMIDI_VolumeModel_9X;
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}
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}
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void OPN2::clearChips()
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{
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for(size_t i = 0; i < m_chips.size(); i++)
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m_chips[i].reset(NULL);
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m_chips.clear();
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}
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void OPN2::reset(int emulator, unsigned long PCM_RATE, void *audioTickHandler)
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{
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#if !defined(ADLMIDI_AUDIO_TICK_HANDLER)
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ADL_UNUSED(audioTickHandler);
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#endif
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clearChips();
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m_insCache.clear();
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m_regLFOSens.clear();
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m_chips.resize(m_numChips, AdlMIDI_SPtr<OPNChipBase>());
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for(size_t i = 0; i < m_chips.size(); i++)
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{
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OPNChipBase *chip;
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switch(emulator)
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{
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default:
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assert(false);
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abort();
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#ifndef OPNMIDI_DISABLE_MAME_EMULATOR
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case OPNMIDI_EMU_MAME:
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chip = new MameOPN2;
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break;
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#endif
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#ifndef OPNMIDI_DISABLE_NUKED_EMULATOR
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case OPNMIDI_EMU_NUKED:
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chip = new NukedOPN2;
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break;
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#endif
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#ifndef OPNMIDI_DISABLE_GENS_EMULATOR
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case OPNMIDI_EMU_GENS:
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chip = new GensOPN2;
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break;
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#endif
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#ifndef OPNMIDI_DISABLE_GX_EMULATOR
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case OPNMIDI_EMU_GX:
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chip = new GXOPN2;
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break;
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#endif
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}
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m_chips[i].reset(chip);
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chip->setChipId((uint32_t)i);
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chip->setRate((uint32_t)PCM_RATE, 7670454);
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if(m_runAtPcmRate)
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chip->setRunningAtPcmRate(true);
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#if defined(ADLMIDI_AUDIO_TICK_HANDLER)
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chip->setAudioTickHandlerInstance(audioTickHandler);
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#endif
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}
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m_numChannels = m_numChips * 6;
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m_insCache.resize(m_numChannels, m_emptyInstrument.opn[0]);
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m_regLFOSens.resize(m_numChannels, 0);
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uint8_t regLFOSetup = (m_lfoEnable ? 8 : 0) | (m_lfoFrequency & 7);
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m_regLFOSetup = regLFOSetup;
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for(size_t card = 0; card < m_numChips; ++card)
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{
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writeReg(card, 0, 0x22, regLFOSetup);//push current LFO state
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writeReg(card, 0, 0x27, 0x00); //set Channel 3 normal mode
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writeReg(card, 0, 0x2B, 0x00); //Disable DAC
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//Shut up all channels
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writeReg(card, 0, 0x28, 0x00 ); //Note Off 0 channel
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writeReg(card, 0, 0x28, 0x01 ); //Note Off 1 channel
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writeReg(card, 0, 0x28, 0x02 ); //Note Off 2 channel
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writeReg(card, 0, 0x28, 0x04 ); //Note Off 3 channel
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writeReg(card, 0, 0x28, 0x05 ); //Note Off 4 channel
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writeReg(card, 0, 0x28, 0x06 ); //Note Off 5 channel
|
|
}
|
|
|
|
silenceAll();
|
|
}
|