otomatalabs/furnace
8
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

add more vibrato shapes

Browse source
This commit is contained in:
tildearrow 2024-06-24 06:24:14 -05:00
parent 55a8bb2448
commit 2877d488ca
5 changed files with 65 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/engine/engine.cpp
View file

@ -101,7 +101,7 @@ const char* DivEngine::getEffectDesc(unsigned char effect, int chan, bool notNul
case 0xe2:
return _("E2xy: Note slide down (x: speed; y: semitones)");
case 0xe3:
return _("E3xx: Set vibrato shape (0: up/down; 1: up only; 2: down only)");
return _("E3xx: Set vibrato shape");
case 0xe4:
return _("E4xx: Set vibrato range");
case 0xe5:

4
src/engine/engine.h
View file

@ -135,7 +135,7 @@ struct DivChannelState {
int note, oldNote, lastIns, pitch, portaSpeed, portaNote;
int volume, volSpeed, cut, legatoDelay, legatoTarget, rowDelay, volMax;
int delayOrder, delayRow, retrigSpeed, retrigTick;
int vibratoDepth, vibratoRate, vibratoPos, vibratoPosGiant, vibratoDir, vibratoFine;
int vibratoDepth, vibratoRate, vibratoPos, vibratoPosGiant, vibratoShape, vibratoFine;
int tremoloDepth, tremoloRate, tremoloPos;
int sampleOff;
unsigned char arp, arpStage, arpTicks, panL, panR, panRL, panRR, lastVibrato, lastPorta, cutType;
@ -169,7 +169,7 @@ struct DivChannelState {
vibratoRate(0),
vibratoPos(0),
vibratoPosGiant(0),
vibratoDir(0),
vibratoShape(0),
vibratoFine(15),
tremoloDepth(0),
tremoloRate(0),

58
src/engine/playback.cpp
View file

@ -951,9 +951,9 @@ void DivEngine::processRow(int i, bool afterDelay) {
if (!song.brokenShortcutSlides) dispatchCmd(DivCommand(DIV_CMD_PRE_PORTA,i,false,0));
}
break;
case 0xe3: // vibrato direction
chan[i].vibratoDir=effectVal;
dispatchCmd(DivCommand(DIV_CMD_HINT_VIBRATO_SHAPE,i,chan[i].vibratoDir));
case 0xe3: // vibrato shape
chan[i].vibratoShape=effectVal;
dispatchCmd(DivCommand(DIV_CMD_HINT_VIBRATO_SHAPE,i,chan[i].vibratoShape));
break;
case 0xe4: // vibrato fine
chan[i].vibratoFine=effectVal;
@ -1579,19 +1579,55 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
while (chan[i].vibratoPos>=64) chan[i].vibratoPos-=64;
chan[i].vibratoPosGiant+=chan[i].vibratoRate;
while (chan[i].vibratoPos>=512) chan[i].vibratoPos-=512;
while (chan[i].vibratoPosGiant>=512) chan[i].vibratoPosGiant-=512;
switch (chan[i].vibratoDir) {
case 1: // up
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MAX(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
int vibratoOut=0;
switch (chan[i].vibratoShape) {
case 1: // sine, up only
vibratoOut=MAX(0,vibTable[chan[i].vibratoPos]);
break;
case 2: // down
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(MIN(0,(chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
case 2: // sine, down only
vibratoOut=MIN(0,vibTable[chan[i].vibratoPos]);
break;
default: // both
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibTable[chan[i].vibratoPos]*chan[i].vibratoFine)>>4)/15)));
case 3: // triangle
vibratoOut=(chan[i].vibratoPos&31);
if (chan[i].vibratoPos&16) {
vibratoOut=32-(chan[i].vibratoPos&31);
}
if (chan[i].vibratoPos&32) {
vibratoOut=-vibratoOut;
}
vibratoOut<<=3;
break;
case 4: // ramp up
vibratoOut=chan[i].vibratoPos<<1;
break;
case 5: // ramp down
vibratoOut=-chan[i].vibratoPos<<1;
break;
case 6: // square
vibratoOut=(chan[i].vibratoPos>=32)?-127:127;
break;
case 7: // random (TODO: use LFSR)
vibratoOut=(rand()&255)-128;
break;
case 8: // square up
vibratoOut=(chan[i].vibratoPos>=32)?0:127;
break;
case 9: // square down
vibratoOut=(chan[i].vibratoPos>=32)?0:-127;
break;
case 10: // half sine up
vibratoOut=vibTable[chan[i].vibratoPos>>1];
break;
case 11: // half sine down
vibratoOut=vibTable[32|(chan[i].vibratoPos>>1)];
break;
default: // sine
vibratoOut=vibTable[chan[i].vibratoPos];
break;
}
dispatchCmd(DivCommand(DIV_CMD_PITCH,i,chan[i].pitch+(((chan[i].vibratoDepth*vibratoOut*chan[i].vibratoFine)>>4)/15)));
}
if (chan[i].legatoDelay>0) {
if (--chan[i].legatoDelay<1) {