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https://github.com/ZDoom/gzdoom-gles.git
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87d46ddd11
## 1.5.0 2020-09-28 * Drum note length expanding is now supported in real-time mode (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!) * Added support for OPNA chip with Neko Project II Kai YM2602 emulator usage (Thanks to [Jean Pierre Cimalando](https://github.com/jpcima) for a work!) * Added VGM file dumper which allows to output OPN2 commands into VGM file. (A new MIDI to VGM tool is now created with basing on libOPNMIDI) * Fixed an incorrect work of CC-121 (See https://github.com/Wohlstand/libADLMIDI/issues/227 for details) * Internality has been refactored and improved
84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
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* Interfaces over Yamaha OPN2 (YM2612) chip emulators
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*
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* Copyright (C) 2020 Vitaly Novichkov (Wohlstand)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "pmdwin_opna.h"
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#include "pmdwin/opna.h"
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#include <cstring>
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#include <cassert>
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PMDWinOPNA::PMDWinOPNA(OPNFamily f)
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: OPNChipBaseBufferedT(f)
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{
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OPNA *opn = new OPNA;
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chip = reinterpret_cast<ChipType *>(opn);
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setRate(m_rate, m_clock);
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}
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PMDWinOPNA::~PMDWinOPNA()
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{
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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delete opn;
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}
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void PMDWinOPNA::setRate(uint32_t rate, uint32_t clock)
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{
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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OPNChipBaseBufferedT::setRate(rate, clock);
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uint32_t chipRate = isRunningAtPcmRate() ? rate : nativeRate();
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std::memset(chip, 0, sizeof(*opn));
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OPNAInit(opn, m_clock, chipRate, 0);
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OPNASetReg(opn, 0x29, 0x9f);
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}
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void PMDWinOPNA::reset()
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{
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OPNChipBaseBufferedT::reset();
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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OPNAReset(opn);
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OPNASetReg(opn, 0x29, 0x9f);
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}
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void PMDWinOPNA::writeReg(uint32_t port, uint16_t addr, uint8_t data)
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{
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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OPNASetReg(opn, (port << 8) | addr, data);
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}
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void PMDWinOPNA::writePan(uint16_t chan, uint8_t data)
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{
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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OPNASetPan(opn, chan, data);
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}
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void PMDWinOPNA::nativeGenerateN(int16_t *output, size_t frames)
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{
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// be cautious to avoid overflowing stack buffer on PMDWin side!
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// (on OPNChipBaseBuffered it's fine)
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assert(frames < 16384 / 2);
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OPNA *opn = reinterpret_cast<OPNA *>(chip);
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OPNAMix(opn, output, static_cast<uint32_t>(frames));
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}
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const char *PMDWinOPNA::emulatorName()
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{
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return "PMDWin OPNA"; // git 2018-05-11 rev 255ef52
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}
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