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77 lines
1.9 KiB
C++
77 lines
1.9 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 "gens_opn2.h"
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#include <cstring>
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#include "gens/Ym2612_Emu.h"
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GensOPN2::GensOPN2()
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: chip(new Ym2612_Emu())
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{
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setRate(m_rate, m_clock);
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}
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GensOPN2::~GensOPN2()
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{
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delete chip;
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}
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void GensOPN2::setRate(uint32_t rate, uint32_t clock)
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{
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OPNChipBaseBufferedT::setRate(rate, clock);
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uint32_t chipRate = isRunningAtPcmRate() ? rate : static_cast<uint32_t>(nativeRate);
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chip->set_rate(chipRate, clock); // implies reset()
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}
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void GensOPN2::reset()
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{
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OPNChipBaseBufferedT::reset();
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chip->reset();
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}
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void GensOPN2::writeReg(uint32_t port, uint16_t addr, uint8_t data)
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{
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switch (port)
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{
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case 0:
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chip->write0(addr, data);
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break;
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case 1:
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chip->write1(addr, data);
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break;
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}
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}
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void GensOPN2::writePan(uint16_t chan, uint8_t data)
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{
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chip->write_pan(static_cast<int>(chan), static_cast<int>(data));
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}
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void GensOPN2::nativeGenerateN(int16_t *output, size_t frames)
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{
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std::memset(output, 0, frames * sizeof(int16_t) * 2);
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chip->run((int)frames, output);
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}
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const char *GensOPN2::emulatorName()
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{
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return "GENS 2.10 OPN2";
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}
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