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Amiga: acquireDirect, part 2

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the filter is back!
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tildearrow 2025-03-05 04:49:22 -05:00
parent e116f2e523
commit e941dfb174
5 changed files with 85 additions and 44 deletions
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16
src/engine/platform/amiga.cpp
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@ -381,7 +381,21 @@ void DivPlatformAmiga::acquireDirect(blip_buffer_t** bb, size_t off, size_t len)
}
void DivPlatformAmiga::postProcess(short* buf, int outIndex, size_t len, int sampleRate) {
//buf[0]=32767;
// filtering
if (amigaModel) {
filtConstOff=4000;
filtConstOn=sin(M_PI*8000.0/((double)sampleRate*2.0))*4096.0;
} else {
filtConstOff=sin(M_PI*16000.0/((double)sampleRate*2.0))*4096.0;
filtConstOn=sin(M_PI*5500.0/((double)sampleRate*2.0))*4096.0;
}
filtConst=filterOn?filtConstOn:filtConstOff;
for (size_t i=0; i<len; i++) {
filter[outIndex][0]+=(filtConst*(buf[i]-filter[outIndex][0]))>>12;
filter[outIndex][1]+=(filtConst*(filter[outIndex][0]-filter[outIndex][1]))>>12;
buf[i]=filter[outIndex][1];
}
}
void DivPlatformAmiga::irq(int ch) {