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pagefault
2001-09-06 15:35:26 +00:00
parent 6c62722e58
commit 5a61b0af86
2 changed files with 51 additions and 8 deletions
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19
zsnes/src/zip/fir_proc.cpp
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@@ -70,7 +70,7 @@ inline float log2(float f) {
// cutoff (1.0 == pi/2)
#define WFIR_CUTOFF 0.90f
#define WFIR_CUTOFFBITS 12
#define WFIR_CUTOFFLEN (1L<<(WFIR_CUTOFFBITS))
#define WFIR_CUTOFFLEN ((1L<<(WFIR_CUTOFFBITS))+1)
// wfir type
#define WFIR_HANN 0
#define WFIR_HAMMING 1
@@ -139,11 +139,11 @@ class CzWINDOWEDFIR
return (float)(_LWc*_LSi);
}
static signed short lut[WFIR_LUTLEN*WFIR_WIDTH];
static signed int lut_co[WFIR_CUTOFFLEN*WFIR_WIDTH];
static signed short lut_co[WFIR_CUTOFFLEN*WFIR_WIDTH];
};
signed short CzWINDOWEDFIR::lut[WFIR_LUTLEN*WFIR_WIDTH];
signed int CzWINDOWEDFIR::lut_co[WFIR_CUTOFFLEN*WFIR_WIDTH];
signed short CzWINDOWEDFIR::lut_co[WFIR_CUTOFFLEN*WFIR_WIDTH];
CzWINDOWEDFIR::CzWINDOWEDFIR()
{ int _LPcl;
@@ -177,7 +177,7 @@ CzWINDOWEDFIR::CzWINDOWEDFIR()
for( _LCc=0; _LCc<WFIR_WIDTH;_LCc++ )
{
float _LCoef = (float)floor( 0.5 + _LScale*_LCoefs[_LCc]*_LGain );
lut_co[_LIdx+_LCc] = (signed int)( (_LCoef<-_LScale)?-_LScale:((_LCoef>_LScale)?_LScale:_LCoef) );
lut_co[_LIdx+_LCc] = (signed short)( (_LCoef<-_LScale)?-_LScale:((_LCoef>_LScale)?_LScale:_LCoef) );
}
}
}
@@ -239,6 +239,7 @@ float coef( int _PCnr, float _POfs, float _PCut, int _PWidth, int _PType ) //flo
CzWINDOWEDFIR sfir;
extern "C" signed short *fir_lut = &CzWINDOWEDFIR::lut[0];
extern "C" signed short *fir_lut_co = &CzWINDOWEDFIR::lut_co[0];
#if 0
@@ -273,8 +274,10 @@ extern "C" int fir_interpolate(unsigned int nPos, int *p)
#endif
#define WFIR_CUTOFFSHIFT (32-(WFIR_CUTOFFBITS+WFIR_LOG2WIDTH))
#define WFIR_CUTOFFMASK ((((1L<<(32-WFIR_CUTOFFSHIFT))-1)&~((1L<<WFIR_LOG2WIDTH)-1)))
#if 0
#define WFIR_CUTOFFSHIFT (32-(WFIR_CUTOFFBITS+1+WFIR_LOG2WIDTH))
#define WFIR_CUTOFFMASK ((((1L<<(33-WFIR_CUTOFFSHIFT))-1)&~((1L<<WFIR_LOG2WIDTH)-1)))
#define WFIR_CUTOFFHALVE (1L<<(32-(WFIR_CUTOFFBITS+1)))
inline void __fir_downsample(unsigned int freq, signed int *p, signed short *out)
@@ -327,4 +330,6 @@ inline void __fir_downsample(unsigned int freq, signed int *p, signed short *out
extern "C" void fir_downsample(unsigned int freq, signed int *p, signed short *out)
{
__fir_downsample(freq, p, out);
}
}
#endif