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compound system flattening, part 1

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as of now compound systems (Genesis and Arcade) are translated to
separate chips.

this improves audio quality and makes things easier.

it also allows you to change the volume of each chip on a Genesis.

also adds SegaPCM system with 16 channels!
This commit is contained in:
tildearrow 2022-02-23 02:52:30 -05:00
parent a7ecb4ecdb
commit e4b9a6d1d9
13 changed files with 641 additions and 286 deletions
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55
src/engine/fileOps.cpp
View file

@ -649,7 +649,24 @@ bool DivEngine::loadDMF(unsigned char* file, size_t len) {
}
}
// handle special systems
// handle compound systems
if (ds.system[0]==DIV_SYSTEM_GENESIS) {
ds.systemLen=2;
ds.system[0]=DIV_SYSTEM_YM2612;
ds.system[1]=DIV_SYSTEM_SMS;
ds.systemVol[1]=24;
}
if (ds.system[0]==DIV_SYSTEM_GENESIS_EXT) {
ds.systemLen=2;
ds.system[0]=DIV_SYSTEM_YM2612_EXT;
ds.system[1]=DIV_SYSTEM_SMS;
ds.systemVol[1]=24;
}
if (ds.system[0]==DIV_SYSTEM_ARCADE) {
ds.systemLen=2;
ds.system[0]=DIV_SYSTEM_YM2151;
ds.system[1]=DIV_SYSTEM_SEGAPCM_COMPAT;
}
if (ds.system[0]==DIV_SYSTEM_SMS_OPLL) {
ds.systemLen=2;
ds.system[0]=DIV_SYSTEM_SMS;
@ -789,6 +806,42 @@ bool DivEngine::loadFur(unsigned char* file, size_t len) {
ds.systemFlags[i]=reader.readI();
}
// handle compound systems
for (int i=0; i<32; i++) {
if (ds.system[i]==DIV_SYSTEM_GENESIS ||
ds.system[i]==DIV_SYSTEM_GENESIS_EXT ||
ds.system[i]==DIV_SYSTEM_ARCADE) {
for (int j=31; j>i; j--) {
ds.system[j]=ds.system[j-1];
ds.systemVol[j]=ds.systemVol[j-1];
ds.systemPan[j]=ds.systemPan[j-1];
}
if (++ds.systemLen>32) ds.systemLen=32;
if (ds.system[i]==DIV_SYSTEM_GENESIS) {
ds.system[i]=DIV_SYSTEM_YM2612;
if (i<31) {
ds.system[i+1]=DIV_SYSTEM_SMS;
ds.systemVol[i+1]=(((ds.systemVol[i]&127)*3)>>3)|(ds.systemVol[i]&128);
}
}
if (ds.system[i]==DIV_SYSTEM_GENESIS_EXT) {
ds.system[i]=DIV_SYSTEM_YM2612_EXT;
if (i<31) {
ds.system[i+1]=DIV_SYSTEM_SMS;
ds.systemVol[i+1]=(((ds.systemVol[i]&127)*3)>>3)|(ds.systemVol[i]&128);
}
}
if (ds.system[i]==DIV_SYSTEM_ARCADE) {
ds.system[i]=DIV_SYSTEM_YM2151;
if (i<31) {
ds.system[i+1]=DIV_SYSTEM_SEGAPCM_COMPAT;
}
}
i++;
}
}
ds.name=reader.readString();
ds.author=reader.readString();
logI("%s by %s\n",ds.name.c_str(),ds.author.c_str());