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79 lines
2 KiB
C++
79 lines
2 KiB
C++
/*
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* Interfaces over Yamaha OPN2 (YM2612) chip emulators
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*
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* Copyright (C) 2017-2018 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 "mame_opn2.h"
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#include "mame/mame_ym2612fm.h"
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#include <cstdlib>
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#include <assert.h>
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MameOPN2::MameOPN2()
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{
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chip = NULL;
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setRate(m_rate, m_clock);
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}
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MameOPN2::~MameOPN2()
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{
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ym2612_shutdown(chip);
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}
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void MameOPN2::setRate(uint32_t rate, uint32_t clock)
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{
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OPNChipBaseT::setRate(rate, clock);
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if(chip)
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ym2612_shutdown(chip);
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uint32_t chipRate = isRunningAtPcmRate() ? rate : static_cast<uint32_t>(nativeRate);
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chip = ym2612_init(NULL, (int)clock, (int)chipRate, NULL, NULL);
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ym2612_reset_chip(chip);
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}
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void MameOPN2::reset()
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{
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OPNChipBaseT::reset();
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ym2612_reset_chip(chip);
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}
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void MameOPN2::writeReg(uint32_t port, uint16_t addr, uint8_t data)
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{
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ym2612_write(chip, 0 + (int)(port) * 2, (uint8_t)addr);
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ym2612_write(chip, 1 + (int)(port) * 2, data);
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}
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void MameOPN2::writePan(uint16_t chan, uint8_t data)
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{
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ym2612_write_pan(chip, (int)chan, data);
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}
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void MameOPN2::nativePreGenerate()
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{
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void *chip = this->chip;
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ym2612_pre_generate(chip);
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}
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void MameOPN2::nativeGenerate(int16_t *frame)
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{
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void *chip = this->chip;
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ym2612_generate_one_native(chip, frame);
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}
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const char *MameOPN2::emulatorName()
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{
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return "MAME YM2612";
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}
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