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GUI: add an FM preview

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currently for OPN only
This commit is contained in:
tildearrow 2023-03-18 04:22:50 -05:00
parent 57f4cc8561
commit 09a30570de
7 changed files with 141 additions and 82 deletions
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84
src/gui/fmPreview.cpp
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@ -22,61 +22,63 @@
#include "../../extern/opn/ym3438.h"
#define FM_WRITE(addr,val) \
OPN2_Write(&fm,0,(addr)); \
OPN2_Write((ym3438_t*)fmPreviewOPN,0,(addr)); \
do { \
OPN2_Clock(&fm,out); \
} while (fm.write_busy); \
OPN2_Write(&fm,1,(val)); \
OPN2_Clock((ym3438_t*)fmPreviewOPN,out); \
} while (((ym3438_t*)fmPreviewOPN)->write_busy); \
OPN2_Write((ym3438_t*)fmPreviewOPN,1,(val)); \
do { \
OPN2_Clock(&fm,out); \
} while (fm.write_busy); \
OPN2_Clock((ym3438_t*)fmPreviewOPN,out); \
} while (((ym3438_t*)fmPreviewOPN)->write_busy); \
const unsigned char dtTableFMP[8]={
7,6,5,0,1,2,3,4
};
void FurnaceGUI::renderFMPreview(const DivInstrumentFM& params, int pos) {
ym3438_t fm;
if (fmPreviewOPN==NULL) {
fmPreviewOPN=new ym3438_t;
}
short out[2];
int aOut=0;
bool mult0=false;
OPN2_Reset(&fm);
OPN2_SetChipType(&fm,ym3438_mode_opn);
if (pos==0) {
OPN2_Reset((ym3438_t*)fmPreviewOPN);
OPN2_SetChipType((ym3438_t*)fmPreviewOPN,ym3438_mode_opn);
// set params
FM_WRITE(0x50,31); // AR
FM_WRITE(0x54,31);
FM_WRITE(0x58,31);
FM_WRITE(0x5c,31);
FM_WRITE(0x60,0); // DR
FM_WRITE(0x64,0);
FM_WRITE(0x68,0);
FM_WRITE(0x6c,0);
FM_WRITE(0x70,0); // D2R
FM_WRITE(0x74,0);
FM_WRITE(0x78,0);
FM_WRITE(0x7c,0);
FM_WRITE(0x80,0); // SL/RR
FM_WRITE(0x84,0);
FM_WRITE(0x88,0);
FM_WRITE(0x8c,0);
FM_WRITE(0xa4,0x0c); // frequency
FM_WRITE(0xa0,0);
FM_WRITE(0xb0,(params.alg&7)|((params.fb&7)<<3)); // ALG/FB
FM_WRITE(0xb4,0xc0); // pan
FM_WRITE(0x30,params.op[0].mult&15); // MULT
FM_WRITE(0x34,params.op[1].mult&15);
FM_WRITE(0x38,params.op[2].mult&15);
FM_WRITE(0x3c,params.op[3].mult&15);
FM_WRITE(0x40,params.op[0].tl&127); // TL
FM_WRITE(0x44,params.op[1].tl&127);
FM_WRITE(0x48,params.op[2].tl&127);
FM_WRITE(0x4c,params.op[3].tl&127);
FM_WRITE(0x28,0xf0); // key on
// set params
for (int i=0; i<4; i++) {
if ((params.op[i].mult&15)==0) {
mult0=true;
break;
}
}
for (int i=0; i<4; i++) {
const DivInstrumentFM::Operator& op=params.op[i];
unsigned short baseAddr=i*4;
FM_WRITE(baseAddr+0x40,op.tl);
FM_WRITE(baseAddr+0x30,(op.mult&15)|(dtTableFMP[op.dt&7]<<4));
FM_WRITE(baseAddr+0x50,(op.ar&31)|(op.rs<<6));
FM_WRITE(baseAddr+0x60,(op.dr&31)|(op.am<<7));
FM_WRITE(baseAddr+0x70,op.d2r&31);
FM_WRITE(baseAddr+0x80,(op.rr&15)|(op.sl<<4));
FM_WRITE(baseAddr+0x90,op.ssgEnv&15);
}
FM_WRITE(0xb0,(params.alg&7)|((params.fb&7)<<3));
FM_WRITE(0xb4,0xc0|(params.fms&7)|((params.ams&3)<<4));
FM_WRITE(0xa4,mult0?0x1c:0x14); // frequency
FM_WRITE(0xa0,0);
FM_WRITE(0x28,0xf0); // key on
}
// render
for (int i=0; i<FM_PREVIEW_SIZE; i++) {
aOut=0;
for (int j=0; j<24; j++) {
OPN2_Clock(&fm,out);
OPN2_Clock((ym3438_t*)fmPreviewOPN,out);
}
aOut+=fm.ch_out[0];
aOut+=((ym3438_t*)fmPreviewOPN)->ch_out[0];
if (aOut<-32768) aOut=-32768;
if (aOut>32767) aOut=32767;
fmPreview[i]=aOut;