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optimize lead sample shifts

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This commit is contained in:
Joachim Fenkes 2012-08-11 15:27:03 +02:00
parent 3504f5d826
commit cacd33a846
1 changed files with 2 additions and 2 deletions
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4
win/main.cpp
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@ -116,7 +116,7 @@ static unsigned char voice_lead(unsigned long i, int voice_nr)
uint8_t melody = data & 0x1F;
lead_osc += notes[melody];
uint8_t sample = ((lead_osc >> 6) & 0x7F) + ((lead_osc >> 6) & 0x3F);
uint8_t sample = ((lead_osc >> 7) & 0x3F) + ((lead_osc >> 7) & 0x1F);
return (0 == melody) ? 0 : ((boosts & (1 << voice_nr)) ? sample : THREEQUARTERS(sample));
}
@ -161,7 +161,7 @@ static inline unsigned char voice_bass(unsigned long i)
static inline uint8_t next_sample()
{
static unsigned long i = 0;//x40000;
uint8_t ret = (voice_lead(i, 0) >> 1) + THREEQUARTERS(voice_lead(i, 1) >> 2) + (voice_lead(i, 2) >> 3) + (voice_bass(i) >> 2) + voice_arp(i);
uint8_t ret = voice_lead(i, 0) + THREEQUARTERS(voice_lead(i, 1) >> 1) + (voice_lead(i, 2) >> 2) + (voice_bass(i) >> 2) + voice_arp(i);
i++;
if ((i >> 13) == ARPSIZE)
i = 16 << 13;