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/*
* libADLMIDI is a free MIDI to WAV conversion library with OPL3 emulation
*
* Original ADLMIDI code: Copyright (c) 2010-2014 Joel Yliluoma <bisqwit@iki.fi>
* ADLMIDI Library API: Copyright (c) 2015-2018 Vitaly Novichkov <admin@wohlnet.ru>
*
* Library is based on the ADLMIDI, a MIDI player for Linux and Windows with OPL3 emulation:
* http://iki.fi/bisqwit/source/adlmidi.html
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "adlmidi_private.hpp"
std::string ADLMIDI_ErrorString;
// Generator callback on audio rate ticks
#if defined(ADLMIDI_AUDIO_TICK_HANDLER)
void adl_audioTickHandler(void *instance, uint32_t chipId, uint32_t rate)
{
reinterpret_cast<MIDIplay *>(instance)->AudioTick(chipId, rate);
}
#endif
int adlCalculateFourOpChannels(MIDIplay *play, bool silent)
{
size_t n_fourop[2] = {0, 0}, n_total[2] = {0, 0};
//Automatically calculate how much 4-operator channels is necessary
#ifndef DISABLE_EMBEDDED_BANKS
if(play->m_synth.m_embeddedBank == OPL3::CustomBankTag)
#endif
{
//For custom bank
OPL3::BankMap::iterator it = play->m_synth.m_insBanks.begin();
OPL3::BankMap::iterator end = play->m_synth.m_insBanks.end();
for(; it != end; ++it)
{
size_t bank = it->first;
size_t div = (bank & OPL3::PercussionTag) ? 1 : 0;
for(size_t i = 0; i < 128; ++i)
{
adlinsdata2 &ins = it->second.ins[i];
if(ins.flags & adlinsdata::Flag_NoSound)
continue;
if((ins.flags & adlinsdata::Flag_Real4op) != 0)
++n_fourop[div];
++n_total[div];
}
}
}
#ifndef DISABLE_EMBEDDED_BANKS
else
{
//For embedded bank
for(size_t a = 0; a < 256; ++a)
{
size_t insno = banks[play->m_setup.bankId][a];
if(insno == 198)
continue;
++n_total[a / 128];
adlinsdata2 ins = adlinsdata2::from_adldata(::adlins[insno]);
if((ins.flags & adlinsdata::Flag_Real4op) != 0)
++n_fourop[a / 128];
}
}
#endif
size_t numFourOps = 0;
// All 2ops (no 4ops)
if((n_fourop[0] == 0) && (n_fourop[1] == 0))
numFourOps = 0;
// All 2op melodics and Some (or All) 4op drums
else if((n_fourop[0] == 0) && (n_fourop[1] > 0))
numFourOps = 2;
// Many 4op melodics
else if((n_fourop[0] >= (n_total[0] * 7) / 8))
numFourOps = 6;
// Few 4op melodics
else if(n_fourop[0] > 0)
numFourOps = 4;
/* //Old formula
unsigned NumFourOps = ((n_fourop[0] == 0) && (n_fourop[1] == 0)) ? 0
: (n_fourop[0] >= (n_total[0] * 7) / 8) ? play->m_setup.NumCards * 6
: (play->m_setup.NumCards == 1 ? 1 : play->m_setup.NumCards * 4);
*/
play->m_synth.m_numFourOps = static_cast<unsigned>(numFourOps * play->m_synth.m_numChips);
// Update channel categories and set up four-operator channels
if(!silent)
play->m_synth.updateChannelCategories();
return 0;
}
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