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OPL: pretend to be YMU and enable SOME emulation?

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This commit is contained in:
tildearrow 2022-03-15 00:33:57 -05:00
parent 8355aa0175
commit a65df5cdab
4 changed files with 27 additions and 4 deletions
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9
src/engine/fileOps.cpp
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@ -223,7 +223,7 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
}
ds.customTempo=true;
ds.timeBase=0;
addWarning("Yamaha YMU759 emulation is not currently possible!");
addWarning("Yamaha YMU759 emulation is incomplete! please migrate your song to the OPL3 system.");
}
logI("reading pattern matrix (%d)...\n",ds.ordersLen);
@ -277,6 +277,9 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
if ((ds.system[0]==DIV_SYSTEM_SMS_OPLL || ds.system[0]==DIV_SYSTEM_NES_VRC7) && ins->type==DIV_INS_FM) {
ins->type=DIV_INS_OPLL;
}
if (ds.system[0]==DIV_SYSTEM_YMU759) {
ins->type=DIV_INS_OPL;
}
if (ins->mode) { // FM
ins->fm.alg=reader.readC();
@ -573,6 +576,10 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
pat->data[k][1]-=2;
}
}
if (ds.system[0]==DIV_SYSTEM_YMU759 && pat->data[k][0]!=0) {
// apparently YMU759 is stored 2 octaves lower
pat->data[k][1]+=2;
}
if (pat->data[k][0]==0 && pat->data[k][1]!=0) {
logD("what? %d:%d:%d note %d octave %d\n",i,j,k,pat->data[k][0],pat->data[k][1]);
pat->data[k][0]=12;