etc/furnace
0
0
Fork 0
mirror of https://github.com/tildearrow/furnace.git synced 2024-11-01 18:42:40 +00:00
Code Issues Projects Releases Packages Wiki Activity

Fully implement speed

Browse source
This commit is contained in:
techmetx11 2024-04-15 23:56:49 +01:00
parent 6be1dbdf5e
commit 77523588a4
No known key found for this signature in database
GPG key ID: 20E0C88A0E7E5AF2
1 changed files with 101 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

120
src/engine/fileOps/tfm.cpp
View file

@ -161,18 +161,40 @@ String TFMparseDate(short date) {
return fmt::sprintf("%02d.%02d.%02d",date>>11,(date>>7)&0xF,date&0x7F);
}
struct TFMparsePatternInfo {
struct TFMSpeed {
unsigned char speedEven;
unsigned char speedOdd;
unsigned char interleaveFactor;
bool operator==(const TFMSpeed &s) const {
return speedEven==s.speedEven && speedOdd==s.speedOdd && interleaveFactor==s.interleaveFactor;
}
};
// to make it work with map
template<>
struct std::hash<TFMSpeed>
{
size_t operator()(const TFMSpeed& s) const noexcept {
return s.speedEven<<16|s.speedOdd<<8|s.interleaveFactor;
}
};
struct TFMParsePatternInfo {
TFMRLEReader* reader;
unsigned char maxPat;
unsigned char* patLens;
unsigned char* orderList;
unsigned char speedEven;
unsigned char speedOdd;
unsigned char interleaveFactor;
bool* patExists;
DivSong* ds;
int* insNumMaps;
bool v2;
};
void TFMparsePattern(struct TFMparsePatternInfo info) {
void TFMParsePattern(struct TFMParsePatternInfo info) {
// PATTERN DATA FORMAT (not described properly in the documentation)
// for each channel in a pattern:
// - note data (256 bytes)
@ -187,6 +209,28 @@ void TFMparsePattern(struct TFMparsePatternInfo info) {
unsigned short lastSlide=0;
unsigned short lastVibrato=0;
struct TFMSpeed speed;
DivGroovePattern groove;
speed.speedEven=info.speedEven;
speed.speedOdd=info.speedOdd;
speed.interleaveFactor=info.interleaveFactor;
int speedGrooveIndex=1;
std::unordered_map<TFMSpeed, int> speeds({{speed, 0}});
// initialize the global groove pattern first
if (speed.interleaveFactor>8) {
logW("speed interleave factor is bigger than 8, speed information may be inaccurate");
speed.interleaveFactor=8;
}
for (int i=0; i<speed.interleaveFactor; i++) {
groove.val[i]=speed.speedEven;
groove.val[i+speed.interleaveFactor]=speed.speedOdd;
}
groove.len=speed.interleaveFactor*2;
info.ds->grooves.push_back(groove);
for (int i=0; i<256; i++) {
if (i>info.maxPat) break;
else if (!info.patExists[i]) {
@ -349,9 +393,50 @@ void TFMparsePattern(struct TFMparsePatternInfo info) {
break;
}
break;
default:
pat->data[k][4]=effectNum[k];
pat->data[k][5]=effectVal[k];
case 15:
// speed
if (effectVal[k]==0) {
// if speed is set to zero (reset to global values)
speed.speedEven=info.speedEven;
speed.speedOdd=info.speedOdd;
speed.interleaveFactor=info.interleaveFactor;
} else if (effectVal[k]>>4==0) {
// if the top nibble is set to zero (set interleave factor)
speed.interleaveFactor=effectVal[k]&0xF;
} else if ((effectVal[k]>>4)==(effectVal[k]&0xF)) {
// if both speeds are equal
pat->data[k][4]=0x0F;
unsigned char speedSet=effectVal[k]>>4;
pat->data[k][5]=speedSet;
break;
} else {
speed.speedEven=effectVal[k]>>4;
speed.speedOdd=effectVal[k]&0xF;
}
auto speedIndex = speeds.find(speed);
if (speedIndex != speeds.end()) {
pat->data[k][4]=0x09;
pat->data[k][5]=speedIndex->second;
break;
}
if (speed.interleaveFactor>8) {
logW("speed interleave factor is bigger than 8, speed information may be inaccurate");
speed.interleaveFactor=8;
}
for (int i=0; i<speed.interleaveFactor; i++) {
groove.val[i]=speed.speedEven;
groove.val[i+speed.interleaveFactor]=speed.speedOdd;
}
groove.len=speed.interleaveFactor*2;
info.ds->grooves.push_back(groove);
speeds[speed]=speedGrooveIndex;
pat->data[k][4]=0x09;
pat->data[k][5]=speedGrooveIndex;
speedGrooveIndex++;
break;
}
}
@ -410,15 +495,6 @@ void TFMparsePattern(struct TFMparsePatternInfo info) {
case 0xA:
chVolumeSlide[j]=true;
break;
case 0xF:
// correct speed
// if both speeds are equal
if ((pat->data[k][5]>>4)==(pat->data[k][5]&0xF)) {
unsigned char speed=pat->data[k][5]>>4;
pat->data[k][5]=speed;
}
break;
default:
break;
}
@ -578,16 +654,19 @@ bool DivEngine::loadTFMv1(unsigned char* file, size_t len) {
ds.subsong[0]->patLen=maxPatLen;
struct TFMparsePatternInfo info;
struct TFMParsePatternInfo info;
info.ds=&ds;
info.insNumMaps=insNumMaps;
info.maxPat=maxPat;
info.patExists=patExists;
info.orderList=orderList;
info.speedEven=speed>>4;
info.speedOdd=speed&0xF;
info.interleaveFactor=interleaveFactor;
info.patLens=patLens;
info.reader=&reader;
info.v2=false;
TFMparsePattern(info);
TFMParsePattern(info);
if (active) quitDispatch();
BUSY_BEGIN_SOFT;
@ -761,7 +840,7 @@ bool DivEngine::loadTFMv2(unsigned char* file, size_t len) {
unsigned char patLens[256];
int maxPatLen=0;
reader.read(patLens, 256);
for (int i=0;i<256;i++) {
for (int i=0; i<256; i++) {
if (patLens[i]==0) {
maxPatLen=256;
break;
@ -772,16 +851,19 @@ bool DivEngine::loadTFMv2(unsigned char* file, size_t len) {
ds.subsong[0]->patLen=maxPatLen;
struct TFMparsePatternInfo info;
struct TFMParsePatternInfo info;
info.ds=&ds;
info.insNumMaps=insNumMaps;
info.maxPat=maxPat;
info.patExists=patExists;
info.orderList=orderList;
info.speedEven=speedEven;
info.speedOdd=speedOdd;
info.interleaveFactor=interleaveFactor;
info.patLens=patLens;
info.reader=&reader;
info.v2=true;
TFMparsePattern(info);
TFMParsePattern(info);
if (active) quitDispatch();
BUSY_BEGIN_SOFT;