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Partially implement TFM's effects

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Fix the mismatched patterns hack to be more seamless, by adding the
"jump to next pattern" effects in the last row, in addition to the row
after that
This commit is contained in:
techmetx11 2024-04-11 22:43:53 +00:00
parent 736f812503
commit f75ab6186d
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GPG key ID: 20E0C88A0E7E5AF2
1 changed files with 45 additions and 7 deletions
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52
src/engine/fileOps/tfm.cpp
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@ -86,7 +86,7 @@ public:
// in certain parts of the header and footer)
// TFM music maker actually uses double 0x80 to escape the 0x80
// for example: 0xDA 0x80 0x80 0x00 0x23 = 0xDA 0x80 0x00 0x23)
if (ret==0x80 && curSeek+1<len) {
if (ret==0x80 && curSeek+1<=len) {
if (buf[curSeek+1]!=0x80) {
decodeRLE(buf[curSeek-2]);
tagLenLeft--;
@ -356,6 +356,10 @@ bool DivEngine::loadTFM(unsigned char* file, size_t len) {
// put a "jump to next pattern" effect if the pattern is smaller than the maximum pattern lengths
if (patLens[i]!=0 && patLens[i]<ds.subsong[0]->patLen) {
if (pat->data[patLens[i]-1][4]==-1 && pat->data[patLens[i]-1][5]==-1) {
pat->data[patLens[i]-1][4]=0x0D;
pat->data[patLens[i]-1][5]=0x00;
}
pat->data[patLens[i]][4]=0x0D;
pat->data[patLens[i]][5]=0x00;
}
@ -374,14 +378,48 @@ bool DivEngine::loadTFM(unsigned char* file, size_t len) {
logD("parsing instruments of pattern %d channel %d",i,j);
for (int k=0; k<256; k++) {
if (patDataBuf[k]==0) continue;
else {
pat->data[k][2]=insNumMaps[patDataBuf[k]-1];
}
pat->data[k][2]=insNumMaps[patDataBuf[k]-1];
}
logD("ignoring unused data of pattern %d channel %d",i,j);
reader.read(patDataBuf,256);
reader.read(patDataBuf,256);
// effects
unsigned char effectNum[256];
unsigned char effectVal[256];
reader.read(effectNum,256);
reader.read(effectVal,256);
for (int k=0; k<256; k++) {
switch (effectNum[k]) {
case 0:
// arpeggio or no effect (if effect val is 0)
if (effectVal[k]==0) break;
pat->data[k][4]=effectNum[k];
pat->data[k][5]=effectVal[k];
break;
case 1:
// pitch slide up
case 2:
// pitch slide down
case 3:
// portamento
case 4:
// vibrato
pat->data[k][4]=effectNum[k];
pat->data[k][5]=effectVal[k];
break;
case 5:
// poramento + volume slide
pat->data[k][4]=0x06;
pat->data[k][5]=effectVal[k];
break;
case 6:
// vibrato + volume slide
pat->data[k][4]=0x05;
pat->data[k][5]=effectVal[k];
default:
break;
}
}
reader.skip(1536);
}