2023-03-18 00:12:09 +00:00
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/**
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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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#define _USE_MATH_DEFINES
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#include "gui.h"
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#include "../../extern/opn/ym3438.h"
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#define FM_WRITE(addr,val) \
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2023-03-18 09:22:50 +00:00
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OPN2_Write((ym3438_t*)fmPreviewOPN,0,(addr)); \
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2023-03-18 00:12:09 +00:00
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do { \
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2023-03-18 09:22:50 +00:00
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OPN2_Clock((ym3438_t*)fmPreviewOPN,out); \
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} while (((ym3438_t*)fmPreviewOPN)->write_busy); \
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OPN2_Write((ym3438_t*)fmPreviewOPN,1,(val)); \
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2023-03-18 00:12:09 +00:00
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do { \
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2023-03-18 09:22:50 +00:00
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OPN2_Clock((ym3438_t*)fmPreviewOPN,out); \
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} while (((ym3438_t*)fmPreviewOPN)->write_busy); \
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const unsigned char dtTableFMP[8]={
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7,6,5,0,1,2,3,4
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};
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2023-03-18 00:12:09 +00:00
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void FurnaceGUI::renderFMPreview(const DivInstrumentFM& params, int pos) {
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2023-03-18 09:22:50 +00:00
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if (fmPreviewOPN==NULL) {
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fmPreviewOPN=new ym3438_t;
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}
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2023-03-18 00:12:09 +00:00
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short out[2];
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int aOut=0;
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2023-03-18 09:22:50 +00:00
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bool mult0=false;
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2023-03-18 00:12:09 +00:00
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2023-03-18 09:22:50 +00:00
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if (pos==0) {
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OPN2_Reset((ym3438_t*)fmPreviewOPN);
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OPN2_SetChipType((ym3438_t*)fmPreviewOPN,ym3438_mode_opn);
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2023-03-18 00:12:09 +00:00
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2023-03-18 09:22:50 +00:00
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// set params
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for (int i=0; i<4; i++) {
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if ((params.op[i].mult&15)==0) {
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mult0=true;
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break;
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}
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}
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for (int i=0; i<4; i++) {
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const DivInstrumentFM::Operator& op=params.op[i];
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unsigned short baseAddr=i*4;
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FM_WRITE(baseAddr+0x40,op.tl);
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FM_WRITE(baseAddr+0x30,(op.mult&15)|(dtTableFMP[op.dt&7]<<4));
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FM_WRITE(baseAddr+0x50,(op.ar&31)|(op.rs<<6));
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FM_WRITE(baseAddr+0x60,(op.dr&31)|(op.am<<7));
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FM_WRITE(baseAddr+0x70,op.d2r&31);
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FM_WRITE(baseAddr+0x80,(op.rr&15)|(op.sl<<4));
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FM_WRITE(baseAddr+0x90,op.ssgEnv&15);
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}
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FM_WRITE(0xb0,(params.alg&7)|((params.fb&7)<<3));
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FM_WRITE(0xb4,0xc0|(params.fms&7)|((params.ams&3)<<4));
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FM_WRITE(0xa4,mult0?0x1c:0x14); // frequency
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FM_WRITE(0xa0,0);
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FM_WRITE(0x28,0xf0); // key on
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}
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// render
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for (int i=0; i<FM_PREVIEW_SIZE; i++) {
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aOut=0;
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for (int j=0; j<24; j++) {
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OPN2_Clock((ym3438_t*)fmPreviewOPN,out);
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}
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aOut+=((ym3438_t*)fmPreviewOPN)->ch_out[0];
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if (aOut<-32768) aOut=-32768;
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if (aOut>32767) aOut=32767;
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fmPreview[i]=aOut;
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}
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}
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