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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
View file

@ -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) {

77
src/engine/platform/opl.cpp
View file

@ -19,6 +19,7 @@
#include "opl.h"
#include "../engine.h"
#include "../bsr.h"
#include "../../ta-log.h"
#include <string.h>
#include <math.h>
@ -1386,39 +1387,12 @@ void DivPlatformOPL::tick(bool sysTick) {
double off=(s->centerRate>=1)?((double)s->centerRate/8363.0):1.0;
chan[i].freq=(int)(off*parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,false,2,chan[i].pitch2,chipClock,(524288*768)));
if (chan[i].freq<0x400) chan[i].freq=0x400;
if (chan[i].freq>0x3ffffff) chan[i].freq=0x3ffffff;
if (chan[i].freq>=0x2000000) {
chan[i].freqH=0;
if (chan[i].freq>0x3ffffff) {
chan[i].freq=0x3ffffff;
chan[i].freqH=15;
} else if (chan[i].freq>=0x1000000) {
chan[i].freqH=14;
} else if (chan[i].freq>=0x800000) {
chan[i].freqH=13;
} else if (chan[i].freq>=0x400000) {
chan[i].freqH=12;
} else if (chan[i].freq>=0x200000) {
chan[i].freqH=11;
} else if (chan[i].freq>=0x100000) {
chan[i].freqH=10;
} else if (chan[i].freq>=0x80000) {
chan[i].freqH=9;
} else if (chan[i].freq>=0x40000) {
chan[i].freqH=8;
} else if (chan[i].freq>=0x20000) {
chan[i].freqH=7;
} else if (chan[i].freq>=0x10000) {
chan[i].freqH=6;
} else if (chan[i].freq>=0x8000) {
chan[i].freqH=5;
} else if (chan[i].freq>=0x4000) {
chan[i].freqH=4;
} else if (chan[i].freq>=0x2000) {
chan[i].freqH=3;
} else if (chan[i].freq>=0x1000) {
chan[i].freqH=2;
} else if (chan[i].freq>=0x800) {
chan[i].freqH=1;
} else {
chan[i].freqH=0;
chan[i].freqH=bsr32(chan[i].freq)-11;
}
chan[i].freqL=(chan[i].freq>>chan[i].freqH)&0x3ff;
chan[i].freqH=8^chan[i].freqH;
@ -1528,44 +1502,15 @@ void DivPlatformOPL::tick(bool sysTick) {
#define OPLL_C_NUM 686
int DivPlatformOPL::octave(int freq) {
if (freq>=OPLL_C_NUM*64) {
return 128;
} else if (freq>=OPLL_C_NUM*32) {
return 64;
} else if (freq>=OPLL_C_NUM*16) {
return 32;
} else if (freq>=OPLL_C_NUM*8) {
return 16;
} else if (freq>=OPLL_C_NUM*4) {
return 8;
} else if (freq>=OPLL_C_NUM*2) {
return 4;
} else if (freq>=OPLL_C_NUM) {
return 2;
} else {
return 1;
}
return 1;
freq/=OPLL_C_NUM;
if (freq==0) return 1;
return 1<<bsr(freq);
}
int DivPlatformOPL::toFreq(int freq) {
if (freq>=OPLL_C_NUM*64) {
return 0x1c00|((freq>>7)&0x3ff);
} else if (freq>=OPLL_C_NUM*32) {
return 0x1800|((freq>>6)&0x3ff);
} else if (freq>=OPLL_C_NUM*16) {
return 0x1400|((freq>>5)&0x3ff);
} else if (freq>=OPLL_C_NUM*8) {
return 0x1000|((freq>>4)&0x3ff);
} else if (freq>=OPLL_C_NUM*4) {
return 0xc00|((freq>>3)&0x3ff);
} else if (freq>=OPLL_C_NUM*2) {
return 0x800|((freq>>2)&0x3ff);
} else if (freq>=OPLL_C_NUM) {
return 0x400|((freq>>1)&0x3ff);
} else {
return freq&0x3ff;
}
int block=freq/OPLL_C_NUM;
if (block>0) block=bsr(block);
return (block<<10)|((freq>>block)&0x3ff);
}
void DivPlatformOPL::muteChannel(int ch, bool mute) {

42
src/engine/platform/opll.cpp
View file

@ -19,6 +19,7 @@
#include "opll.h"
#include "../engine.h"
#include "../bsr.h"
#include "../../ta-log.h"
#include <string.h>
#include <math.h>
@ -352,44 +353,15 @@ void DivPlatformOPLL::tick(bool sysTick) {
#define OPLL_C_NUM 343
int DivPlatformOPLL::octave(int freq) {
if (freq>=OPLL_C_NUM*64) {
return 128;
} else if (freq>=OPLL_C_NUM*32) {
return 64;
} else if (freq>=OPLL_C_NUM*16) {
return 32;
} else if (freq>=OPLL_C_NUM*8) {
return 16;
} else if (freq>=OPLL_C_NUM*4) {
return 8;
} else if (freq>=OPLL_C_NUM*2) {
return 4;
} else if (freq>=OPLL_C_NUM) {
return 2;
} else {
return 1;
}
return 1;
freq/=OPLL_C_NUM;
if (freq==0) return 1;
return 1<<bsr(freq);
}
int DivPlatformOPLL::toFreq(int freq) {
if (freq>=OPLL_C_NUM*64) {
return 0xe00|((freq>>7)&0x1ff);
} else if (freq>=OPLL_C_NUM*32) {
return 0xc00|((freq>>6)&0x1ff);
} else if (freq>=OPLL_C_NUM*16) {
return 0xa00|((freq>>5)&0x1ff);
} else if (freq>=OPLL_C_NUM*8) {
return 0x800|((freq>>4)&0x1ff);
} else if (freq>=OPLL_C_NUM*4) {
return 0x600|((freq>>3)&0x1ff);
} else if (freq>=OPLL_C_NUM*2) {
return 0x400|((freq>>2)&0x1ff);
} else if (freq>=OPLL_C_NUM) {
return 0x200|((freq>>1)&0x1ff);
} else {
return freq&0x1ff;
}
int block=freq/OPLL_C_NUM;
if (block>0) block=bsr(block);
return (block<<9)|((freq>>block)&0x1ff);
}
void DivPlatformOPLL::muteChannel(int ch, bool mute) {

20
src/engine/platform/saa.cpp
View file

@ -19,6 +19,7 @@
#include "saa.h"
#include "../engine.h"
#include "../bsr.h"
#include "sound/saa1099.h"
#include <string.h>
#include <math.h>
@ -155,22 +156,9 @@ void DivPlatformSAA1099::tick(bool sysTick) {
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,chan[i].fixedArp?chan[i].baseNoteOverride:chan[i].arpOff,chan[i].fixedArp,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
if (chan[i].freq>65535) chan[i].freq=65535;
if (chan[i].freq>=32768) {
chan[i].freqH=7;
} else if (chan[i].freq>=16384) {
chan[i].freqH=6;
} else if (chan[i].freq>=8192) {
chan[i].freqH=5;
} else if (chan[i].freq>=4096) {
chan[i].freqH=4;
} else if (chan[i].freq>=2048) {
chan[i].freqH=3;
} else if (chan[i].freq>=1024) {
chan[i].freqH=2;
} else if (chan[i].freq>=512) {
chan[i].freqH=1;
} else {
chan[i].freqH=0;
chan[i].freqH=0;
if (chan[i].freq>511) {
chan[i].freqH=bsr((unsigned short)chan[i].freq)-9;
}
chan[i].freqL=0xff-(chan[i].freq>>chan[i].freqH);
chan[i].freqH=7-chan[i].freqH;