mirror of https://github.com/ZDoom/qzdoom.git
109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/*
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* libADLMIDI is a free MIDI to WAV conversion library with OPL3 emulation
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*
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* Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
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* ADLMIDI Library API: Copyright (c) 2015-2018 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 "adlmidi_private.hpp"
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std::string ADLMIDI_ErrorString;
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// Generator callback on audio rate ticks
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#if defined(ADLMIDI_AUDIO_TICK_HANDLER)
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void adl_audioTickHandler(void *instance, uint32_t chipId, uint32_t rate)
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{
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reinterpret_cast<MIDIplay *>(instance)->AudioTick(chipId, rate);
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}
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#endif
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int adlCalculateFourOpChannels(MIDIplay *play, bool silent)
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{
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size_t n_fourop[2] = {0, 0}, n_total[2] = {0, 0};
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//Automatically calculate how much 4-operator channels is necessary
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#ifndef DISABLE_EMBEDDED_BANKS
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if(play->m_synth.m_embeddedBank == OPL3::CustomBankTag)
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#endif
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{
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//For custom bank
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OPL3::BankMap::iterator it = play->m_synth.m_insBanks.begin();
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OPL3::BankMap::iterator end = play->m_synth.m_insBanks.end();
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for(; it != end; ++it)
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{
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size_t bank = it->first;
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size_t div = (bank & OPL3::PercussionTag) ? 1 : 0;
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for(size_t i = 0; i < 128; ++i)
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{
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adlinsdata2 &ins = it->second.ins[i];
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if(ins.flags & adlinsdata::Flag_NoSound)
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continue;
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if((ins.flags & adlinsdata::Flag_Real4op) != 0)
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++n_fourop[div];
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++n_total[div];
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}
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}
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}
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#ifndef DISABLE_EMBEDDED_BANKS
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else
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{
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//For embedded bank
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for(size_t a = 0; a < 256; ++a)
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{
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size_t insno = banks[play->m_setup.bankId][a];
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if(insno == 198)
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continue;
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++n_total[a / 128];
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adlinsdata2 ins = adlinsdata2::from_adldata(::adlins[insno]);
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if((ins.flags & adlinsdata::Flag_Real4op) != 0)
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++n_fourop[a / 128];
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}
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}
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#endif
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size_t numFourOps = 0;
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// All 2ops (no 4ops)
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if((n_fourop[0] == 0) && (n_fourop[1] == 0))
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numFourOps = 0;
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// All 2op melodics and Some (or All) 4op drums
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else if((n_fourop[0] == 0) && (n_fourop[1] > 0))
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numFourOps = 2;
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// Many 4op melodics
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else if((n_fourop[0] >= (n_total[0] * 7) / 8))
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numFourOps = 6;
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// Few 4op melodics
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else if(n_fourop[0] > 0)
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numFourOps = 4;
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/* //Old formula
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unsigned NumFourOps = ((n_fourop[0] == 0) && (n_fourop[1] == 0)) ? 0
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: (n_fourop[0] >= (n_total[0] * 7) / 8) ? play->m_setup.NumCards * 6
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: (play->m_setup.NumCards == 1 ? 1 : play->m_setup.NumCards * 4);
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*/
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play->m_synth.m_numFourOps = static_cast<unsigned>(numFourOps * play->m_synth.m_numChips);
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// Update channel categories and set up four-operator channels
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if(!silent)
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play->m_synth.updateChannelCategories();
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return 0;
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}
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