88 lines
2.3 KiB
C++
88 lines
2.3 KiB
C++
/**
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* Furnace Tracker - multi-system chiptune tracker
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* Copyright (C) 2021-2023 tildearrow and contributors
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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 2 of the License, or
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* (at your option) 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _CHIP_UTILS_H
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#define _CHIP_UTILS_H
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#include "macroInt.h"
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// custom clock limits
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#define MIN_CUSTOM_CLOCK 100000
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#define MAX_CUSTOM_CLOCK 40000000
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// common shared channel struct
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template<typename T> struct SharedChannel {
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int freq, baseFreq, baseNoteOverride, pitch, pitch2, arpOff;
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int ins, note;
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bool active, insChanged, freqChanged, fixedArp, keyOn, keyOff, portaPause, inPorta;
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T vol, outVol;
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DivMacroInt std;
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void handleArp(int offset=0) {
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if (std.arp.had) {
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if (std.arp.val<0) {
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if (!(std.arp.val&0x40000000)) {
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baseNoteOverride=(std.arp.val|0x40000000)+offset;
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fixedArp=true;
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} else {
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arpOff=std.arp.val;
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fixedArp=false;
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}
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} else {
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if (std.arp.val&0x40000000) {
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baseNoteOverride=(std.arp.val&(~0x40000000))+offset;
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fixedArp=true;
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} else {
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arpOff=std.arp.val;
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fixedArp=false;
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}
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}
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freqChanged=true;
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}
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}
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void macroInit(DivInstrument* which) {
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std.init(which);
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pitch2=0;
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arpOff=0;
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baseNoteOverride=0;
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fixedArp=false;
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}
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SharedChannel(T initVol):
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freq(0),
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baseFreq(0),
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baseNoteOverride(0),
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pitch(0),
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pitch2(0),
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arpOff(0),
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ins(-1),
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note(0),
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active(false),
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insChanged(true),
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freqChanged(false),
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fixedArp(false),
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keyOn(false),
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keyOff(false),
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portaPause(false),
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inPorta(false),
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vol(initVol),
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outVol(initVol),
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std() {}
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};
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#endif
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