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Updated ft2play to version 0.43a, which optimizes the RelocateTon function used by glissando tone slides and arpeggio effects

CQTexperiment
Chris Moeller 2014-04-08 17:06:24 -07:00
parent efcfa5bdb5
commit 1737f4021d
1 changed files with 20 additions and 33 deletions
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49
Frameworks/modplay/modplay/ft2play.c
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@ -1,5 +1,5 @@
/*
** FT2PLAY v0.42a
** FT2PLAY v0.43a
** ==============
**
** C port of FastTracker II's replayer, by 8bitbubsy (Olav Sørensen)
@ -973,7 +973,7 @@ CheckEffects:
// E7x - set tremolo waveform
else if ((ch->Eff & 0xF0) == 0x70) ch->WaveCtrl = ((ch->Eff & 0x0F) << 4) | (ch->WaveCtrl & 0x0F);
// E8x - set panning *non-FT2*
// E8x - set 4-bit panning (NON-FT2)
else if ((ch->Eff & 0xF0) == 0x80)
{
ch->OutPan = (ch->Eff & 0x0F) << 4;
@ -1520,44 +1520,31 @@ static int16_t RelocateTon(PLAYER *p, int16_t inPeriod, int8_t addNote, StmTyp *
int8_t i;
int8_t fineTune;
int32_t outPeriod; // is 32-bit for testing bit 17, for carry (adc/sbb)
int32_t lookUp;
int16_t oldPeriod;
int16_t addPeriod;
uint16_t lower;
uint16_t middle;
uint16_t upper;
oldPeriod = 0;
addPeriod = (8 * 12 * 16) * 2; // *2, make 16-bit look-up
fineTune = ((ch->FineTune / 8) + 16) * 2; // *2, make 16-bit look-up
fineTune = ch->FineTune / 8; // -16..15
lower = 0;
upper = 8 * 12 * 16;
for (i = 0; i < 8; ++i)
{
outPeriod = (((oldPeriod + addPeriod) >> 1) & 0xFFE0) + fineTune;
if (outPeriod < fineTune) outPeriod += (1 << 8);
middle = ((lower + upper) >> 1) & 0xFFF0;
lookUp = (outPeriod - 16) >> 1; // 16-bit look-up, shift it down
if (lookUp < ((12 * 10 * 16) + 16)) // non-FT2 security fix, may or may not happen
{
if (inPeriod >= p->Note2Period[lookUp])
{
outPeriod -= fineTune;
if (outPeriod & 0x00010000) outPeriod = (outPeriod - (1 << 8)) & 0x0000FFE0;
addPeriod = (int16_t)(outPeriod);
}
if (inPeriod >= p->Note2Period[middle + fineTune])
upper = middle;
else
{
outPeriod -= fineTune;
if (outPeriod & 0x00010000) outPeriod = (outPeriod - (1 << 8)) & 0x0000FFE0;
oldPeriod = (int16_t)(outPeriod);
}
}
lower = middle;
}
outPeriod = oldPeriod + fineTune;
if (outPeriod < fineTune) outPeriod += (1 << 8);
outPeriod += ((int16_t)(addNote) << 5);
fineTune += 16; // make unsigned (0..31)
middle = lower + fineTune + (addNote << 4);
if (outPeriod >= ((((8 * 12 * 16) + 15) * 2) - 1)) outPeriod = ((8 * 12 * 16) + 15) * 2;
return (p->Note2Period[outPeriod >> 1]); // 16-bit look-up, shift it down
if (middle >= ((8 * 12 * 16) + 15) - 1)
middle = (8 * 12 * 16) + 15;
return (p->Note2Period[middle]);
}
static void TonePorta(PLAYER *p, StmTyp *ch)