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Use bsr() in frequency shift calculations

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This commit is contained in:
Natt Akuma 2024-09-18 13:05:45 +07:00
parent 9905981e61
commit 6a58797669
6 changed files with 77 additions and 145 deletions
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17
src/engine/platform/esfm.cpp
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@ -19,6 +19,7 @@
#include "esfm.h"
#include "../engine.h"
#include "../bsr.h"
#include "../../ta-log.h"
#include <string.h>
#include <stdio.h>
@ -366,21 +367,19 @@ void DivPlatformESFM::tick(bool sysTick) {
}
int DivPlatformESFM::octave(int freq) {
int result=1;
while (freq>0x3ff) {
freq>>=1;
result<<=1;
if (freq>0x3ff) {
return 1<<(bsr32(freq)-10);
}
return result;
return 1;
}
int DivPlatformESFM::toFreq(int freq) {
int block=0;
while (freq>0x3ff) {
freq>>=1;
block++;
if (freq>0x3ff) {
block=bsr32(freq)-10;
freq>>=block;
}
return ((block&7)<<10)|(freq&0x3ff);
return (block<<10)|(freq&0x3ff);
}
void DivPlatformESFM::muteChannel(int ch, bool mute) {