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fft1.c
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fft1.c
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// Copyright (c) <2012> <Leif Asbrink>
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction,
// including without limitation the rights to use, copy, modify,
// merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
// OR OTHER DEALINGS IN THE SOFTWARE.
#include <unistd.h>
#include <string.h>
#include "globdef.h"
#include "uidef.h"
#include "fft1def.h"
#include "screendef.h"
#include "caldef.h"
#include "seldef.h"
#include "rusage.h"
#include "thrdef.h"
#include "options.h"
#include "hwaredef.h"
void fix2_dspnames(char *s,int i)
{
s[i]='c';
s[i+1]='o';
s[i+2]='r';
s[i+3]='r';
s[i+4]=0;
s[0]='d';
s[1]='s';
s[2]='p';
}
int fix1_dspnames(char *s)
{
int i;
i=0;
while(rxpar_filenames[rx_mode][i] != 0)
{
s[i]=rxpar_filenames[rx_mode][i];
i++;
}
s[i]='_';
i++;
return i;
}
void make_iqcorr_filename(char *s)
{
int i;
i=fix1_dspnames(s);
s[i]='i';
s[i+1]='q';
i+=2;
fix2_dspnames(s,i);
}
void make_filfunc_filename(char *s)
{
int i;
i=fix1_dspnames(s);
fix2_dspnames(s,i);
}
void update_wg_waterf(void)
{
wg_waterf_ptr-=wg_xpixels;
if(wg_waterf_ptr < 0)wg_waterf_ptr+=wg_waterf_size;
if(audio_dump_flag)
{
awake_screen();
}
wg_waterf_sum_counter=0;
}
void fft1_waterfall(void)
{
int i,j,k,m,ix;
float der,t1,t2,y,yval;
while(fft1_sumsq_pwg != fft1_sumsq_pa )
{
j=fft1_sumsq_pwg+wg.first_xpoint;
for(i=wg_first_point; i <= wg_last_point; i++)
{
wg_waterf_sum[i]+=fft1_sumsq[j];
j++;
}
fft1_sumsq_pwg=(fft1_sumsq_pwg+fft1_size)&fft1_sumsq_mask;
wg_waterf_sum_counter+=wg.fft_avg1num;
if(wg_waterf_sum_counter >= wg.waterfall_avgnum)
{
// A new summed power spectrum has arrived.
// Convert it from linear power scale to log in units of 0.1dB.
// Expand or contract so we get the number of pixels that
// will fit on the screen.
// Store at the pos of our current line in waterfall
if(wg.xpoints_per_pixel == 1 || wg.pixels_per_xpoint == 1)
{
i=wg.first_xpoint;
for(ix=0; ix < wg_xpixels; ix++)
{
y=1000*(float)log10(wg_waterf_sum[i]*wg_waterf_yfac[i]);
if(y < -32767)y=-32767;
if(y>32767)y=32767;
wg_waterf[wg_waterf_ptr+ix]=(short int)y;
i++;
}
}
else
{
if(wg.xpoints_per_pixel == 0)
{
// There are more pixels than data points so we must interpolate.
y=1000*(float)log10(wg_waterf_sum[wg.first_xpoint]*
wg_waterf_yfac[wg.first_xpoint]);
yval=y;
if(y < -32767)y=-32767;
if(y>32767)y=32767;
wg_waterf[wg_waterf_ptr]=(short int)y;
i=wg.first_xpoint+1;
m=wg_xpixels-wg.pixels_per_xpoint;
for(ix=0; ix<m; ix+=wg.pixels_per_xpoint)
{
t1=1000*(float)log10(wg_waterf_sum[i]*wg_waterf_yfac[i]);
der=(t1-yval)/(float)wg.pixels_per_xpoint;
for(k=ix+1; k<=ix+wg.pixels_per_xpoint; k++)
{
yval=yval+der;
y=yval;
if(y < -32767)y=32767;
if(y>32767)y=32767;
wg_waterf[wg_waterf_ptr+k]=(short int)y;
}
yval=t1;
i++;
}
if(i < fft1_size)
{
t1=1000*(float)log10(wg_waterf_sum[i]*wg_waterf_yfac[i]);
der=(t1-yval)/(float)wg.pixels_per_xpoint;
for(k=ix+1; k<=ix+wg.pixels_per_xpoint; k++)
{
yval=yval+der;
y=yval;
if(y < -32767)y=32767;
if(y>32767)y=32767;
wg_waterf[wg_waterf_ptr+k]=(short int)y;
}
}
}
else
{
// There is more than one data point for each pixel.
// Pick the strongest bin. We want to enhance the visibility of
// frequency stable signal.
// Slide a triangular filter across the spectrum to make it
// smoother before resampling.
i=wg.first_xpoint;
for(ix=0; ix<wg_xpixels; ix++)
{
t1=0;
for(k=0; k<wg.xpoints_per_pixel; k++)
{
t2=wg_waterf_sum[i+k]*wg_waterf_yfac[i+k];
if(t2 >t1)t1=t2;
}
y=1000*(float)log10(t1);
if(y < -32767)y=-32767;
if(y>32767)y=32767;
wg_waterf[wg_waterf_ptr+ix]=(short int)y;
i+=wg.xpoints_per_pixel;
}
}
}
for(i=wg_first_point; i <= wg_last_point; i++)
{
// Set a very small value rather than zero to avoid errors
// due to sending zero into the log function.
wg_waterf_sum[i]=0.00001F;
}
update_wg_waterf();
}
}
}
void fft1win_dif_one(int timf1p_ref, float *tmp)
{
int m, nn;
int p0, pa, pb, pa1, pb1;
int ia,ib;
float t1,t2,t3,t4;
float x1,x2;
nn=fft1_size/2;
if( (ui.rx_input_mode&DWORD_INPUT) == 0)
{
m=timf1_bytemask/sizeof(short int);
p0=timf1p_ref/sizeof(short int);
p0=(p0-fft1_interleave_points*2+m+1)&m;
pa=p0;
pb=(pa+fft1_size)&m;
ib=fft1_size-2;
if(ui.sample_shift == 0)
{
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_short_int[pa ]*fft1_window[2*ia];
t2=timf1_short_int[pa+1]*fft1_window[2*ia];
ib+=2;
t3=timf1_short_int[pb ]*fft1_window[2*ia+1];
t4=timf1_short_int[pb+1]*fft1_window[2*ia+1];
pa=(pa+2)&m;
x1=t1-t3;
tmp[2*ia ]= t1+t3;
x2=t4-t2;
tmp[2*ia+1]=-(t2+t4);
pb=(pb+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
else
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_short_int[pa ];
ib+=2;
t2=timf1_short_int[pa+1];
t3=timf1_short_int[pb ];
t4=timf1_short_int[pb+1];
x1=t1-t3;
pa=(pa+2)&m;
x2=t4-t2;
tmp[2*ia ]= t1+t3;
tmp[2*ia+1]=-(t2+t4);
pb=(pb+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
}
else
{
if(ui.sample_shift < 0)
{
pa1=(pa+2*ui.sample_shift+m+1)&m;
pb1=(pa1+fft1_size)&m;
}
else
{
pa1=pa;
pb1=pb;
pa=(pa-2*ui.sample_shift+m+1)&m;
pb=(pb-2*ui.sample_shift+m+1)&m;
}
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_short_int[pa ]*fft1_window[2*ia];
t2=timf1_short_int[pa1+1]*fft1_window[2*ia];
ib+=2;
t3=timf1_short_int[pb ]*fft1_window[2*ia+1];
t4=timf1_short_int[pb1+1]*fft1_window[2*ia+1];
pa=(pa+2)&m;
x1=t1-t3;
pb=(pb+2)&m;
tmp[2*ia ]= t1+t3;
x2=t4-t2;
pa1=(pa1+2)&m;
tmp[2*ia+1]=-(t2+t4);
pb1=(pb1+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
else
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_short_int[pa ];
ib+=2;
t2=timf1_short_int[pa1+1];
t3=timf1_short_int[pb ];
pa=(pa+2)&m;
t4=timf1_short_int[pb1+1];
x1=t1-t3;
pb=(pb+2)&m;
x2=t4-t2;
tmp[2*ia ]= t1+t3;
pa1=(pa1+2)&m;
tmp[2*ia+1]=-(t2+t4);
pb1=(pb1+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
}
}
else
{
m=timf1_bytemask/sizeof(int);
p0=timf1p_ref/sizeof(int);
p0=(p0-fft1_interleave_points*2+m+1)&m;
pa=p0;
pb=(pa+fft1_size)&m;
ib=fft1_size-2;
if(ui.sample_shift == 0)
{
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_int[pa ]*fft1_window[2*ia];
t2=timf1_int[pa+1]*fft1_window[2*ia];
ib+=2;
t3=timf1_int[pb ]*fft1_window[2*ia+1];
t4=timf1_int[pb+1]*fft1_window[2*ia+1];
pa=(pa+2)&m;
x1=t1-t3;
tmp[2*ia ]= t1+t3;
x2=t4-t2;
tmp[2*ia+1]=-(t2+t4);
pb=(pb+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
else
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_int[pa ];
t2=timf1_int[pa+1];
ib+=2;
t3=timf1_int[pb ];
t4=timf1_int[pb+1];
pa=(pa+2)&m;
x1=t1-t3;
x2=t4-t2;
pb=(pb+2)&m;
tmp[2*ia ]= t1+t3;
tmp[2*ia+1]=-(t2+t4);
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
}
else
{
if(ui.sample_shift < 0)
{
pa1=(pa+2*ui.sample_shift+m+1)&m;
pb1=(pa1+fft1_size)&m;
}
else
{
pa1=pa;
pb1=pb;
pa=(pa-2*ui.sample_shift+m+1)&m;
pb=(pb-2*ui.sample_shift+m+1)&m;
}
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_int[pa ]*fft1_window[2*ia];
t2=timf1_int[pa1+1]*fft1_window[2*ia];
ib+=2;
t3=timf1_int[pb ]*fft1_window[2*ia+1];
t4=timf1_int[pb1+1]*fft1_window[2*ia+1];
pa=(pa+2)&m;
x1=t1-t3;
pb=(pb+2)&m;
tmp[2*ia ]= t1+t3;
x2=t4-t2;
pa1=(pa1+2)&m;
tmp[2*ia+1]=-(t2+t4);
pb1=(pb1+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
else
{
for( ia=0; ia<nn; ia++)
{
t1=timf1_int[pa ];
t2=timf1_int[pa1+1];
ib+=2;
t3=timf1_int[pb ];
t4=timf1_int[pb1+1];
pa=(pa+2)&m;
x1=t1-t3;
x2=t4-t2;
pb=(pb+2)&m;
tmp[2*ia ]= t1+t3;
tmp[2*ia+1]=-(t2+t4);
pa1=(pa1+2)&m;
tmp[ib ]=fft1tab[ia].cos*x1-fft1tab[ia].sin*x2;
pb1=(pb1+2)&m;
tmp[ib+1]=fft1tab[ia].sin*x1+fft1tab[ia].cos*x2;
}
}
}
}
}
void dif_permute_one(float *out, float *tmp)
{
int nn, ia, ib, ic;
nn=fft1_size;
for(ia=0; ia < nn; ia+=2)
{
ib=2*fft1_permute[ia];
ic=2*fft1_permute[ia+1];
out[ib ]=tmp[2*ia ]+tmp[2*ia+2];
out[ic ]=tmp[2*ia ]-tmp[2*ia+2];
out[ib+1]=tmp[2*ia+1]+tmp[2*ia+3];
out[ic+1]=tmp[2*ia+1]-tmp[2*ia+3];
}
}
void dif_permute_chan(int chan, float *out, float *tmp)
{
int n, ia, ib, ic, pc;
n=fft1_size;
pc=2*chan;
for(ia=0; ia < n; ia+=2)
{
ib=pc+4*fft1_permute[ia];
ic=pc+4*fft1_permute[ia+1];
out[ib ]=tmp[2*ia ]+tmp[2*ia+2];
out[ic ]=tmp[2*ia ]-tmp[2*ia+2];
out[ib+1]=tmp[2*ia+1]+tmp[2*ia+3];
out[ic+1]=tmp[2*ia+1]-tmp[2*ia+3];
}
}
void fft1win_dit_one(int timf1p_ref, float *out)
{
int j, m, nn;
int p0, pa, pa1;
int ia,ib,ic,id;
float t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12;
int ja, jb, jc, jd;
float a1,a2;
float b1,b2;
float c1,c2;
float d1,d2;
nn=fft1_size;
if( (ui.rx_input_mode&DWORD_INPUT) == 0)
{
m=timf1_bytemask/sizeof(short int);
p0=timf1p_ref/sizeof(short int);
p0=(p0-fft1_interleave_points*2+m+1)&m;
if(ui.sample_shift == 0)
{
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
ia=(p0+2*ja)&m;
ib=(p0+2*jb)&m;
ic=(p0+2*jc)&m;
id=(p0+2*jd)&m;
a1=fft1_window[ja]*timf1_short_int[ia ];
a2=fft1_window[ja]*timf1_short_int[ia+1];
b1=fft1_window[jb]*timf1_short_int[ib ];
b2=fft1_window[jb]*timf1_short_int[ib+1];
c1=fft1_window[jc]*timf1_short_int[ic ];
c2=fft1_window[jc]*timf1_short_int[ic+1];
d1=fft1_window[jd]*timf1_short_int[id ];
d2=fft1_window[jd]*timf1_short_int[id+1];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
ia=(p0+2*fft1_permute[j ])&m;
ib=(p0+2*fft1_permute[j+1])&m;
ic=(p0+2*fft1_permute[j+2])&m;
id=(p0+2*fft1_permute[j+3])&m;
t1=(float)(timf1_short_int[ia ])+(float)(timf1_short_int[ib ]);
t2=(float)(timf1_short_int[ia+1])+(float)(timf1_short_int[ib+1]);
t3=(float)(timf1_short_int[ic ])+(float)(timf1_short_int[id ]);
t4=(float)(timf1_short_int[ic+1])+(float)(timf1_short_int[id+1]);
t5=(float)(timf1_short_int[ia ])-(float)(timf1_short_int[ib ]);
t7=(float)(timf1_short_int[ia+1])-(float)(timf1_short_int[ib+1]);
t10=(float)(timf1_short_int[ic ])-(float)(timf1_short_int[id ]);
t6= (float)(timf1_short_int[ic+1])-(float)(timf1_short_int[id+1]);
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
}
else
{
if(ui.sample_shift < 0)
{
pa=p0;
pa1=(p0+2*ui.sample_shift+m+1)&m;
}
else
{
pa1=p0;
pa=(p0-2*ui.sample_shift+m+1)&m;
}
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
a1=fft1_window[ja]*timf1_short_int[((pa+2*ja)&m) ];
a2=fft1_window[ja]*timf1_short_int[((pa1+2*ja)&m)+1];
b1=fft1_window[jb]*timf1_short_int[((pa+2*jb)&m) ];
b2=fft1_window[jb]*timf1_short_int[((pa1+2*jb)&m)+1];
c1=fft1_window[jc]*timf1_short_int[((pa+2*jc)&m) ];
c2=fft1_window[jc]*timf1_short_int[((pa1+2*jc)&m)+1];
d1=fft1_window[jd]*timf1_short_int[((pa+2*jd)&m) ];
d2=fft1_window[jd]*timf1_short_int[((pa1+2*jd)&m)+1];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
t1=(float)(timf1_short_int[((pa+2*fft1_permute[j ])&m) ])+
(float)(timf1_short_int[((pa+2*fft1_permute[j+1])&m) ]);
t2=(float)(timf1_short_int[((pa1+2*fft1_permute[j ])&m)+1])+
(float)(timf1_short_int[((pa1+2*fft1_permute[j+1])&m)+1]);
t3=(float)(timf1_short_int[((pa+2*fft1_permute[j+2])&m) ])+
(float)(timf1_short_int[((pa+2*fft1_permute[j+3])&m) ]);
t4=(float)(timf1_short_int[((pa1+2*fft1_permute[j+2])&m)+1])+
(float)(timf1_short_int[((pa1+2*fft1_permute[j+3])&m)+1]);
t5=(float)(timf1_short_int[((pa+2*fft1_permute[j ])&m) ])-
(float)(timf1_short_int[((pa+2*fft1_permute[j+1])&m) ]);
t7=(float)(timf1_short_int[((pa1+2*fft1_permute[j ])&m)+1])-
(float)(timf1_short_int[((pa1+2*fft1_permute[j+1])&m)+1]);
t10=(float)(timf1_short_int[((pa+2*fft1_permute[j+2])&m) ])-
(float)(timf1_short_int[((pa+2*fft1_permute[j+3])&m) ]);
t6= (float)(timf1_short_int[((pa1+2*fft1_permute[j+2])&m)+1])-
(float)(timf1_short_int[((pa1+2*fft1_permute[j+3])&m)+1]);
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
}
}
else
{
m=timf1_bytemask/sizeof(int);
p0=timf1p_ref/sizeof(int);
p0=(p0-fft1_interleave_points*2+m+1)&m;
if(ui.sample_shift == 0)
{
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
ia=(p0+2*ja)&m;
ib=(p0+2*jb)&m;
ic=(p0+2*jc)&m;
id=(p0+2*jd)&m;
a1=fft1_window[ja]*timf1_int[ia ];
a2=fft1_window[ja]*timf1_int[ia+1];
b1=fft1_window[jb]*timf1_int[ib ];
b2=fft1_window[jb]*timf1_int[ib+1];
c1=fft1_window[jc]*timf1_int[ic ];
c2=fft1_window[jc]*timf1_int[ic+1];
d1=fft1_window[jd]*timf1_int[id ];
d2=fft1_window[jd]*timf1_int[id+1];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
ia=(p0+2*fft1_permute[j ])&m;
ib=(p0+2*fft1_permute[j+1])&m;
ic=(p0+2*fft1_permute[j+2])&m;
id=(p0+2*fft1_permute[j+3])&m;
t1=(float)(timf1_int[ia ])+(float)(timf1_int[ib ]);
t2=(float)(timf1_int[ia+1])+(float)(timf1_int[ib+1]);
t3=(float)(timf1_int[ic ])+(float)(timf1_int[id ]);
t4=(float)(timf1_int[ic+1])+(float)(timf1_int[id+1]);
t5=(float)(timf1_int[ia ])-(float)(timf1_int[ib ]);
t7=(float)(timf1_int[ia+1])-(float)(timf1_int[ib+1]);
t10=(float)(timf1_int[ic ])-(float)(timf1_int[id ]);
t6= (float)(timf1_int[ic+1])-(float)(timf1_int[id+1]);
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
}
else
{
if(ui.sample_shift < 0)
{
pa=p0;
pa1=(p0+2*ui.sample_shift+m+1)&m;
}
else
{
pa1=p0;
pa=(p0-2*ui.sample_shift+m+1)&m;
}
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
a1=fft1_window[ja]*timf1_int[(pa+2*ja)&m ];
a2=fft1_window[ja]*timf1_int[((pa1+2*ja)&m)+1];
b1=fft1_window[jb]*timf1_int[(pa+2*jb)&m ];
b2=fft1_window[jb]*timf1_int[((pa1+2*jb)&m) +1];
c1=fft1_window[jc]*timf1_int[(pa+2*jc)&m ];
c2=fft1_window[jc]*timf1_int[((pa1+2*jc)&m)+1];
d1=fft1_window[jd]*timf1_int[(pa+2*jd)&m ];
d2=fft1_window[jd]*timf1_int[((pa1+2*jd)&m)+1];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
t1= (float)(timf1_int[((pa+2*fft1_permute[j ])&m) ])+
(float)(timf1_int[((pa+2*fft1_permute[j+1])&m) ]);
t2= (float)(timf1_int[((pa1+2*fft1_permute[j ])&m)+1])+
(float)(timf1_int[((pa1+2*fft1_permute[j+1])&m)+1]);
t3= (float)(timf1_int[((pa+2*fft1_permute[j+2])&m) ])+
(float)(timf1_int[((pa+2*fft1_permute[j+3])&m) ]);
t4= (float)(timf1_int[((pa1+2*fft1_permute[j+2])&m)+1])+
(float)(timf1_int[((pa1+2*fft1_permute[j+3])&m)+1]);
t5= (float)(timf1_int[((pa+2*fft1_permute[j ])&m) ])-
(float)(timf1_int[((pa+2*fft1_permute[j+1])&m) ]);
t6= (float)(timf1_int[((pa1+2*fft1_permute[j+2])&m)+1])-
(float)(timf1_int[((pa1+2*fft1_permute[j+3])&m)+1]);
t7= (float)(timf1_int[((pa1+2*fft1_permute[j ])&m)+1])-
(float)(timf1_int[((pa1+2*fft1_permute[j+1])&m)+1]);
t10=(float)(timf1_int[((pa+2*fft1_permute[j+2])&m) ])-
(float)(timf1_int[((pa+2*fft1_permute[j+3])&m) ]);
out[2*j ]=t1+t3;
out[2*j+1]=t2+t4;
out[2*j+4]=t1-t3;
out[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
out[2*j+2]=t12;
out[2*j+3]=t8;
out[2*j+6]=t11;
out[2*j+7]=t9;
}
}
}
}
}
void fft1win_dit_one_real(int timf1p_ref, float *tmp)
{
int j, m, mm, nn;
int p0;
int ia,ib,ic,id;
float t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12;
int ja, jb, jc, jd;
int ka, kb, kc, kd;
float a1,a2;
float b1,b2;
float c1,c2;
float d1,d2;
nn=2*fft1_size;
if( (ui.rx_input_mode&DWORD_INPUT) == 0)
{
m=timf1_bytemask/sizeof(short int);
p0=timf1p_ref/sizeof(short int);
p0=(p0-4*fft1_interleave_points+m+1)&m;
mm=timf1_blockbytes/(2*sizeof(short int));
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
ia=(p0+ja)&m;
ib=(p0+jb)&m;
ic=(p0+jc)&m;
id=(p0+jd)&m;
ka=(mm+p0+ja)&m;
kb=(mm+p0+jb)&m;
kc=(mm+p0+jc)&m;
kd=(mm+p0+jd)&m;
a1=fft1_window[ja]*timf1_short_int[ia];
a2=fft1_window[ja]*timf1_short_int[ka];
b1=fft1_window[jb]*timf1_short_int[ib];
b2=fft1_window[jb]*timf1_short_int[kb];
c1=fft1_window[jc]*timf1_short_int[ic];
c2=fft1_window[jc]*timf1_short_int[kc];
d1=fft1_window[jd]*timf1_short_int[id];
d2=fft1_window[jd]*timf1_short_int[kd];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
tmp[2*j ]=t1+t3;
tmp[2*j+1]=t2+t4;
tmp[2*j+4]=t1-t3;
tmp[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
tmp[2*j+2]=t12;
tmp[2*j+3]=t8;
tmp[2*j+6]=t11;
tmp[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
ia=(p0+fft1_permute[j ])&m;
ib=(p0+fft1_permute[j+1])&m;
ic=(p0+fft1_permute[j+2])&m;
id=(p0+fft1_permute[j+3])&m;
ka=(mm+ia)&m;
kb=(mm+ib)&m;
kc=(mm+ic)&m;
kd=(mm+id)&m;
t1=(float)(timf1_short_int[ia])+(float)(timf1_short_int[ib]);
t2=(float)(timf1_short_int[ka])+(float)(timf1_short_int[kb]);
t3=(float)(timf1_short_int[ic])+(float)(timf1_short_int[id]);
t4=(float)(timf1_short_int[kc])+(float)(timf1_short_int[kd]);
t5=(float)(timf1_short_int[ia])-(float)(timf1_short_int[ib]);
t7=(float)(timf1_short_int[ka])-(float)(timf1_short_int[kb]);
t10=(float)(timf1_short_int[ic])-(float)(timf1_short_int[id]);
t6= (float)(timf1_short_int[kc])-(float)(timf1_short_int[kd]);
tmp[2*j ]=t1+t3;
tmp[2*j+1]=t2+t4;
tmp[2*j+4]=t1-t3;
tmp[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
tmp[2*j+2]=t12;
tmp[2*j+3]=t8;
tmp[2*j+6]=t11;
tmp[2*j+7]=t9;
}
}
}
else
{
m=timf1_bytemask/sizeof(int);
p0=timf1p_ref/sizeof(int);
p0=(p0-4*fft1_interleave_points+m+1)&m;
mm=timf1_blockbytes/(2*sizeof(int));
if(genparm[FIRST_FFT_SINPOW] != 0)
{
for(j=0; j<nn; j+=4)
{
ja=fft1_permute[j ];
jb=fft1_permute[j+1];
jc=fft1_permute[j+2];
jd=fft1_permute[j+3];
ia=(p0+ja)&m;
ib=(p0+jb)&m;
ic=(p0+jc)&m;
id=(p0+jd)&m;
ka=(mm+p0+ja)&m;
kb=(mm+p0+jb)&m;
kc=(mm+p0+jc)&m;
kd=(mm+p0+jd)&m;
a1=fft1_window[ja]*timf1_int[ia];
a2=fft1_window[ja]*timf1_int[ka];
b1=fft1_window[jb]*timf1_int[ib];
b2=fft1_window[jb]*timf1_int[kb];
c1=fft1_window[jc]*timf1_int[ic];
c2=fft1_window[jc]*timf1_int[kc];
d1=fft1_window[jd]*timf1_int[id];
d2=fft1_window[jd]*timf1_int[kd];
t1=a1+b1;
t2=a2+b2;
t3=c1+d1;
t4=c2+d2;
t5=a1-b1;
t7=a2-b2;
t10=c1-d1;
t6= c2-d2;
tmp[2*j ]=t1+t3;
tmp[2*j+1]=t2+t4;
tmp[2*j+4]=t1-t3;
tmp[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
tmp[2*j+2]=t12;
tmp[2*j+3]=t8;
tmp[2*j+6]=t11;
tmp[2*j+7]=t9;
}
}
else
{
for(j=0; j<nn; j+=4)
{
ia=(p0+fft1_permute[j ])&m;
ib=(p0+fft1_permute[j+1])&m;
ic=(p0+fft1_permute[j+2])&m;
id=(p0+fft1_permute[j+3])&m;
ka=(mm+p0+fft1_permute[j ])&m;
kb=(mm+p0+fft1_permute[j+1])&m;
kc=(mm+p0+fft1_permute[j+2])&m;
kd=(mm+p0+fft1_permute[j+3])&m;
t1=(float)(timf1_int[ia])+(float)(timf1_int[ib]);
t2=(float)(timf1_int[ka])+(float)(timf1_int[kb]);
t3=(float)(timf1_int[ic])+(float)(timf1_int[id]);
t4=(float)(timf1_int[kc])+(float)(timf1_int[kd]);
t5=(float)(timf1_int[ia])-(float)(timf1_int[ib]);
t7=(float)(timf1_int[ka])-(float)(timf1_int[kb]);
t10=(float)(timf1_int[ic])-(float)(timf1_int[id]);
t6= (float)(timf1_int[kc])-(float)(timf1_int[kd]);
tmp[2*j ]=t1+t3;
tmp[2*j+1]=t2+t4;
tmp[2*j+4]=t1-t3;
tmp[2*j+5]=t2-t4;
t11=t5-t6;
t8=t7-t10;
t12=t5+t6;
t9=t7+t10;
tmp[2*j+2]=t12;
tmp[2*j+3]=t8;
tmp[2*j+6]=t11;
tmp[2*j+7]=t9;
}
}
}
}
void fft1win_dit_one_dual_real(int timf1p_ref, float *tmp)
{
int j, m, n, mm;
int p0;