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SBI fixes:

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- Support 2OP\x1A header (used in some third party implementations)
- Include 2op pair for Freq Monster 801 6op (4+2op) patches.
- Fall back to filename if no internal patch name found.
This commit is contained in:
James Alan Nguyen 2022-04-12 21:07:21 +10:00
parent 96715ed88c
commit ee14f0fa8c
1 changed files with 65 additions and 6 deletions
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71
src/engine/fileOpsIns.cpp
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@ -447,6 +447,8 @@ void DivEngine::loadS3I(SafeReader& reader, std::vector<DivInstrument*>& ret, St
logE("S3I PCM samples currently not supported.");
}
ins->name = reader.readString(28);
ins->name = (ins->name[0] == '\0') ? stripPath : ins->name;
int s3i_signature = reader.readI();
if (s3i_signature != 0x49524353) {
@ -470,12 +472,13 @@ void DivEngine::loadSBI(SafeReader& reader, std::vector<DivInstrument*>& ret, St
int sbi_header = reader.readI();
// SBI header determines format
bool is_2op = (sbi_header == 0x1A494253); // SBI\x1A
bool is_2op = (sbi_header == 0x1A494253 || sbi_header == 0x1A504F32); // SBI\x1A or 2OP\x1A
bool is_4op = (sbi_header == 0x1A504F34); // 4OP\x1A
bool is_6op = (sbi_header == 0x1A504F36); // 6OP\x1A - Freq Monster 801-specific
// 32-byte null terminated instrument name
ins->name = reader.readString(32);
String patchName = reader.readString(32);
patchName = (patchName.length() == 0) ? stripPath : patchName;
// 2op SBI
uint8_t sbi_Mcharacteristics = reader.readC();
@ -502,11 +505,13 @@ void DivEngine::loadSBI(SafeReader& reader, std::vector<DivInstrument*>& ret, St
uint8_t sbi_M4wave;
uint8_t sbi_C4wave;
uint8_t sbi_4opConnect;
if (is_2op) {
DivInstrumentFM::Operator& opM = ins->fm.op[0];
DivInstrumentFM::Operator& opC = ins->fm.op[1];
ins->fm.ops = 2;
ins->name = patchName;
opM.mult = sbi_Mcharacteristics & 0xF;
opM.ksr = ((sbi_Mcharacteristics >> 4) & 0x1);
opM.sus = ((sbi_Mcharacteristics >> 5) & 0x1);
@ -538,6 +543,7 @@ void DivEngine::loadSBI(SafeReader& reader, std::vector<DivInstrument*>& ret, St
// Ignore rest of file - rest is 'reserved padding'.
reader.seek(0, SEEK_END);
ret.push_back(ins);
}
if (is_4op || is_6op) {
@ -549,6 +555,7 @@ void DivEngine::loadSBI(SafeReader& reader, std::vector<DivInstrument*>& ret, St
DivInstrumentFM::Operator& opM4 = ins->fm.op[1];
DivInstrumentFM::Operator& opC4 = ins->fm.op[3];
ins->fm.ops = 4;
ins->name = patchName;
sbi_M4characteristics = reader.readC();
sbi_C4characteristics = reader.readC();
@ -617,19 +624,71 @@ void DivEngine::loadSBI(SafeReader& reader, std::vector<DivInstrument*>& ret, St
opC4.sl = ((sbi_C4eg_SR >> 4) & 0xF);
opC4.ws = sbi_C4wave;
// Freq Monster 801 SBIs use a 4op+2op layout
if (is_6op) {
ins->name = ins->name + " (4op)";
ret.push_back(ins);
ins = new DivInstrument;
DivInstrumentFM::Operator& opM6 = ins->fm.op[0];
DivInstrumentFM::Operator& opC6 = ins->fm.op[1];
ins->type = DIV_INS_OPL;
ins->fm.ops = 2;
ins->name = patchName + " (2op)";
sbi_Mcharacteristics = reader.readC();
sbi_Ccharacteristics = reader.readC();
sbi_Mscaling_output = reader.readC();
sbi_Cscaling_output = reader.readC();
sbi_Meg_AD = reader.readC();
sbi_Ceg_AD = reader.readC();
sbi_Meg_SR = reader.readC();
sbi_Ceg_SR = reader.readC();
sbi_Mwave = reader.readC();
sbi_Cwave = reader.readC();
sbi_FeedConnect = reader.readC();
opM6.mult = sbi_Mcharacteristics & 0xF;
opM6.ksr = ((sbi_Mcharacteristics >> 4) & 0x1);
opM6.sus = ((sbi_Mcharacteristics >> 5) & 0x1);
opM6.vib = ((sbi_Mcharacteristics >> 6) & 0x1);
opM6.am = ((sbi_Mcharacteristics >> 7) & 0x1);
opM6.tl = sbi_Mscaling_output & 0x3F;
opM6.ksl = ((sbi_Mscaling_output >> 6) & 0x3);
opM6.ar = ((sbi_Meg_AD >> 4) & 0xF);
opM6.dr = (sbi_Meg_AD & 0xF);
opM6.rr = (sbi_Meg_SR & 0xF);
opM6.sl = ((sbi_Meg_SR >> 4) & 0xF);
opM6.ws = sbi_Mwave;
ins->fm.alg = (sbi_FeedConnect & 0x1);
ins->fm.fb = ((sbi_FeedConnect >> 1) & 0x7);
opC6.mult = sbi_Ccharacteristics & 0xF;
opC6.ksr = ((sbi_Ccharacteristics >> 4) & 0x1);
opC6.sus = ((sbi_Ccharacteristics >> 5) & 0x1);
opC6.vib = ((sbi_Ccharacteristics >> 6) & 0x1);
opC6.am = ((sbi_Ccharacteristics >> 7) & 0x1);
opC6.tl = sbi_Cscaling_output & 0x3F;
opC6.ksl = ((sbi_Cscaling_output >> 6) & 0x3);
opC6.ar = ((sbi_Ceg_AD >> 4) & 0xF);
opC6.dr = (sbi_Ceg_AD & 0xF);
opC6.rr = (sbi_Ceg_SR & 0xF);
opC6.sl = ((sbi_Ceg_SR >> 4) & 0xF);
opC6.ws = sbi_Cwave;
}
// Ignore rest of file once we've read in all we need.
// Note: Freq Monster 801 adds a ton of other additional fields irrelevant to chip registers.
reader.seek(0, SEEK_END);
ret.push_back(ins);
}
} catch (EndOfFileException& e) {
lastError = "premature end of file";
logE("premature end of file!");
delete ins;
return;
}
ret.push_back(ins);
}
void DivEngine::loadFF(SafeReader& reader, std::vector<DivInstrument*>& ret, String& stripPath) {