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compound system flattening, part 2

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.dmf saving implemented. only available for the following setups:
- YM2612 + SMS = Genesis
- YM2612 ext3 + SMS = Genesis ext3
- YM2151 + SegaPCM compat = Arcade
- SMS + OPLL = SMS with FM expansion
This commit is contained in:
tildearrow 2022-02-23 03:19:32 -05:00
parent e4b9a6d1d9
commit 319c559f47
1 changed files with 28 additions and 6 deletions
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34
src/engine/fileOps.cpp
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@ -1447,15 +1447,28 @@ SafeWriter* DivEngine::saveDMF(unsigned char version) {
lastError="invalid version to save in! this is a bug!";
return NULL;
}
// check whether system is compound
bool isFlat=false;
if (song.systemLen==2) {
if (song.system[0]==DIV_SYSTEM_YM2612 && song.system[1]==DIV_SYSTEM_SMS) {
isFlat=true;
}
if (song.system[0]==DIV_SYSTEM_YM2612_EXT && song.system[1]==DIV_SYSTEM_SMS) {
isFlat=true;
}
if (song.system[0]==DIV_SYSTEM_YM2151 && song.system[1]==DIV_SYSTEM_SEGAPCM_COMPAT) {
isFlat=true;
}
if (song.system[0]==DIV_SYSTEM_SMS && song.system[1]==DIV_SYSTEM_OPLL) {
isFlat=true;
}
}
// fail if more than one system
// TODO: fix this mess for the flattening in 0.6
if (!(song.system[0]==DIV_SYSTEM_SMS && song.system[1]==DIV_SYSTEM_OPLL)) {
if (song.systemLen!=1) {
if (!isFlat && song.systemLen!=1) {
logE("cannot save multiple systems in this format!\n");
lastError="multiple systems not possible on .dmf";
return NULL;
}
}
// fail if this is an YMU759 song
if (song.system[0]==DIV_SYSTEM_YMU759) {
logE("cannot save YMU759 song!\n");
@ -1469,7 +1482,7 @@ SafeWriter* DivEngine::saveDMF(unsigned char version) {
return NULL;
}
// fail if the system is Furnace-exclusive
if (systemToFile(song.system[0])&0x80) {
if (!isFlat && systemToFile(song.system[0])&0x80) {
logE("cannot save Furnace-exclusive system song!\n");
lastError="this system is not possible on .dmf";
return NULL;
@ -1485,7 +1498,16 @@ SafeWriter* DivEngine::saveDMF(unsigned char version) {
// version
w->writeC(version);
DivSystem sys=DIV_SYSTEM_NULL;
if (song.system[0]==DIV_SYSTEM_SMS && song.system[1]==DIV_SYSTEM_OPLL) {
if (song.system[0]==DIV_SYSTEM_YM2612 && song.system[1]==DIV_SYSTEM_SMS) {
w->writeC(systemToFile(DIV_SYSTEM_GENESIS));
sys=DIV_SYSTEM_GENESIS;
} else if (song.system[0]==DIV_SYSTEM_YM2612_EXT && song.system[1]==DIV_SYSTEM_SMS) {
w->writeC(systemToFile(DIV_SYSTEM_GENESIS_EXT));
sys=DIV_SYSTEM_GENESIS_EXT;
} else if (song.system[0]==DIV_SYSTEM_YM2151 && song.system[1]==DIV_SYSTEM_SEGAPCM_COMPAT) {
w->writeC(systemToFile(DIV_SYSTEM_ARCADE));
sys=DIV_SYSTEM_ARCADE;
} else if (song.system[0]==DIV_SYSTEM_SMS && song.system[1]==DIV_SYSTEM_OPLL) {
w->writeC(systemToFile(DIV_SYSTEM_SMS_OPLL));
sys=DIV_SYSTEM_SMS_OPLL;
} else {