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baseb_graph.c
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baseb_graph.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.
#define YWF 4
#define YBO 4
#define DA_GAIN_RANGE 8.
#define DA_GAIN_REF 1.
#define BG_MINYCHAR 8
#define BG_MIN_WIDTH (36*text_width)
#define BG_BFO 1
#define BG_BFO10 2
#define BG_BFO100 3
#define BG_FLAT 4
#define BG_CURV 5
#define BG_VOLUME 6
#include <unistd.h>
#include <string.h>
#include "globdef.h"
#include "uidef.h"
#include "fft3def.h"
#include "fft2def.h"
#include "fft1def.h"
#include "sigdef.h"
#include "seldef.h"
#include "vernr.h"
#include "screendef.h"
#include "graphcal.h"
#include "rusage.h"
#include "thrdef.h"
#include "options.h"
int binshape_points;
int binshape_total;
int reinit_baseb;
int baseband_graph_scro;
int bg_old_x1;
int bg_old_x2;
int bg_old_y1;
int bg_old_y2;
int new_bg_agc_flag;
int new_bg_fm_mode;
int new_bg_fm_subtract;
int new_bg_ch2_phase;
int new_daout_channels;
int new_daout_bytes;
int new_bg_delay;
int new_bg_coherent;
int new_bg_twopol;
float make_interleave_ratio(int nn);
void prepare_mixer(MIXER_VARIABLES *m, int nn);
static int ch2_signs[3]={1,-1,0};
float iir5_c4(float fq)
{
double f, dt1;
f=fq;
f+=(double)1.09997;
dt1=(double)-8180.447687211407;
dt1+=(double)7606.001654061646/f;
dt1+=(double)4911.238063416248*f;
dt1+=(double)-3722.590923768796/(f*f);
dt1+=(double)-1563.849845278449*f*f;
dt1+=(double)752.161694907701/(f*f*f);
dt1+=(double)204.513728752513*f*f*f;
return (float)dt1;
}
float iir5_c3(float fq)
{
double f, dt1;
f=fq;
f+=(double).486;
dt1=(double)1216.739279441632;
dt1+=(double)-498.037837421718/f;
dt1+=(double)-1605.884219112067*f;
dt1+=(double)98.522399169193/(f*f);
dt1+=(double)1163.334654719262*f*f;
dt1+=(double)-8.037391363636/(f*f*f);
dt1+=(double)-378.207481959566*f*f*f;
dt1+=(double)0.460060792302*f*f*f*f;
return (float)dt1;
}
float iir5_c2(float fq)
{
double f, dt1;
f=fq;
f+=(double).373;
dt1=(double)-1367.817993435964;
dt1+=(double)321.426710716263/f;
dt1+=(double)3143.873042678646*f;
dt1+=(double)-33.921164217429/(f*f);
dt1+=(double)-4207.054014954479*f*f;
dt1+=(double)1.474943544810/(f*f*f);
dt1+=(double)3173.210883130213*f*f*f;
dt1+=(double)-1061.231815380881*f*f*f*f;
return (float)dt1;
}
float iir5_c1(float fq)
{
double f, dt1;
f=fq;
f+=(double).13607;
dt1=(double)44.536544420484;
dt1+=(double)-6.546900527778/f;
dt1+=(double)-135.019183000212*f;
dt1+=(double)0.298668662095/(f*f);
dt1+=(double)185.556866049127*f*f;
dt1+=(double)-0.006124743273/(f*f*f);
dt1+=(double)-66.083966540342*f*f*f;
dt1+=(double)-56.694842234911*f*f*f*f;
return (float)dt1;
}
float iir5_c0(float fq)
{
double f, dt1;
f=fq;
f=f+(double)0.25;
f=pow(f,(double)1.02);
dt1= (double)36.927768658067;
dt1+=(double)-70.589472628117*f;
dt1+=(double)72.191321694731*f*f;
dt1+=(double)-31.339811219801*f*f*f;
dt1+=(double)-10.505632906345/f;
dt1+=(double)1.399038105205/(f*f);
dt1+=(double)-0.043679124720/(f*f*f);
return (float)dt1;
}
float iir5_gain(float fq)
{
double f, dt1;
// fq is the corner frequency divided by the sampling frequency
f=fq;
dt1=(double)0.147800765172*pow(f,-3);
dt1+=(double)0.03169658430080*pow(f,-4);
dt1+=(double)0.0032849456565132*pow(f,-5);
dt1+=(double)-0.1237864623*pow(f,-2);
return (float)dt1;
}
void make_iir5(float fq, IIR5_PARMS *iir5)
{
iir5[0].gain=iir5_gain(fq);
iir5[0].c0=iir5_c0(fq);
iir5[0].c1=iir5_c1(fq);
iir5[0].c2=iir5_c2(fq);
iir5[0].c3=iir5_c3(fq);
iir5[0].c4=iir5_c4(fq);
}
void halt_rx_output(void)
{
int i;
i=0;
await_semclear:;
if(all_threads_started &&
thread_status_flag[THREAD_RX_OUTPUT]!=THRFLAG_SEMCLEAR)
{
if(new_baseb_flag != 0)
{
i++;
lir_sleep(20000);
if(i<200)goto await_semclear;
lirerr(564292);
return;
}
// The output is running. Stop it now!
pause_thread(THREAD_RX_OUTPUT);
thread_command_flag[THREAD_RX_OUTPUT]=THRFLAG_SEMCLEAR;
lir_sched_yield();
while(thread_status_flag[THREAD_RX_OUTPUT] != THRFLAG_SEMCLEAR)
{
lir_sleep(1000);
}
baseb_reset_counter++;
}
}
void clear_baseb_arrays(int nn,int k)
{
memset(&baseb_raw[2*nn],0,2*k*sizeof(float));
memset(&baseb_raw_orthog[2*nn],0,2*k*sizeof(float));
memset(&baseb[2*nn],0,2*k*sizeof(float));
memset(&baseb_carrier[2*nn],0,2*k*sizeof(float));
memset(&baseb_carrier_ampl[nn],0,k*sizeof(float));
memset(&baseb_totpwr[nn],0,k*sizeof(float));
if(bg.agc_flag != 0)
{
memset(&baseb_agc_level[nn],0,k*sizeof(float));
memset(&baseb_agc_det[nn],0,k*sizeof(float));
memset(&baseb_threshold[bg.agc_flag*nn],0,bg.agc_flag*k*sizeof(float));
memset(&baseb_upthreshold[bg.agc_flag*nn],0,bg.agc_flag*k*sizeof(float));
}
lir_sched_yield();
if(genparm[CW_DECODE_ENABLE] != 0)
{
if(bg.agc_flag == 0)
{
memset(&baseb_threshold[nn],0,k*sizeof(float));
memset(&baseb_upthreshold[nn],0,k*sizeof(float));
}
memset(&baseb_ramp[nn],-cg_code_unit,k*sizeof(short int));
memset(&baseb_wb_raw[2*nn],0,2*k*sizeof(float));
memset(&baseb_fit[2*nn],0,2*k*sizeof(float));
memset(&baseb_tmp[2*nn],0,2*k*sizeof(float));
memset(&baseb_sho1[2*nn],0,2*k*sizeof(float));
memset(&baseb_sho2[2*nn],0,2*k*sizeof(float));
memset(&baseb_envelope[2*nn],0,2*k*sizeof(float));
}
lir_sched_yield();
}
int filcur_pixel(int points)
{
float t1;
t1=(float)(2*points)/fft3_size;
t1=sqrt(t1);
return bg_first_xpixel+t1*bg_xpixels;
//return bg_first_xpixel+(bg_xpixels*2*points)/fft3_size;
}
int filcur_points(void)
{
float t1;
t1=(float)(mouse_x-bg_first_xpixel+1)/bg_xpixels;
t1=t1*t1;
return 0.5*fft3_size*t1;
}
void make_bg_waterf_cfac(void)
{
bg_waterf_cfac=bg.waterfall_gain*0.1;
bg_waterf_czer=10*bg.waterfall_zero;
}
void make_bg_yfac(void)
{
if(genparm[SECOND_FFT_ENABLE]==0)
{
bg.yfac_power=FFT1_BASEBAND_FACTOR;
bg.yfac_power*=ui.rx_rf_channels*ui.rx_rf_channels;
}
else
{
bg.yfac_power=FFT2_BASEBAND_FACTOR*
(float)(1<<genparm[FIRST_BCKFFT_ATT_N])/fft2_size;
if(fft_cntrl[FFT2_CURMODE].mmx != 0)
{
bg.yfac_power*=1.4*(1<<(genparm[SECOND_FFT_ATT_N]));
}
bg.yfac_power*=bg.yfac_power;
bg.yfac_power*=(float)(1<<genparm[MIX1_BANDWIDTH_REDUCTION_N]);
}
bg.yfac_power*=(1 + 1/(0.5+genparm[FIRST_FFT_SINPOW]))/(float)(fft1_size);
bg.yfac_power/=fft3_size;
baseband_pwrfac=10*bg.yfac_power/fft3_size;
bg_waterf_yfac=20*baseband_pwrfac/bg.waterfall_avgnum;
bg.yfac_power/=bg.yzero*bg.yzero;
bg.yfac_log=10/bg.db_per_pixel;
}
void make_daout_gain(void)
{
float t1;
if(daout_gain_y>bg_y0)daout_gain_y=bg_y0;
if(daout_gain_y<bg_ymax)daout_gain_y=bg_ymax;
t1=(float)((bg_y0+bg_ymax)/2-daout_gain_y)/(bg_y0-bg_ymax);
bg.output_gain=pow(10.,t1*DA_GAIN_RANGE)/DA_GAIN_REF;
if(rx_mode == MODE_FM && bg_coherent < 2)
{
daout_gain=5*bg.output_gain;
}
else
{
daout_gain=0.5*bg.output_gain/fft3_size;
if(genparm[SECOND_FFT_ENABLE]!=0)
{
daout_gain/=fft2_size;
daout_gain*=1<<genparm[FIRST_BCKFFT_ATT_N];
if(fft_cntrl[FFT2_CURMODE].mmx != 0)
{
daout_gain*=1<<(genparm[SECOND_FFT_ATT_N]);
}
}
daout_gain*=sqrt((1 + 1/(0.5+genparm[FIRST_FFT_SINPOW]))/
(float)(fft1_size));
}
if(rx_daout_bytes == 2)
{
daout_gain*=256;
}
}
void make_daout_gainy(void)
{
int old;
float t1;
old=daout_gain_y;
t1=log10(bg.output_gain*DA_GAIN_REF)/DA_GAIN_RANGE;
daout_gain_y=(bg_y0+bg_ymax)/2-t1*(bg_y0-bg_ymax);
make_daout_gain();
update_bar(bg_vol_x1,bg_vol_x2,bg_y0,daout_gain_y,old,
BG_GAIN_COLOR,bg_volbuf);
}
void make_new_daout_upsamp(void)
{
int k, new;
float t1;
t1=da_resample_ratio;
new=1;
daout_upsamp_n=0;
if( (ui.network_flag & NET_RXOUT_BASEB) == 0)
{
k=genparm[DA_OUTPUT_SPEED];
while(t1 > 5 && k > 16000 && new < 32)
{
daout_upsamp_n++;
k/=2;
t1/=2;
new*=2;
}
}
if(new != daout_upsamp)
{
halt_rx_output();
daout_upsamp=new;
}
}
void make_bfo(void)
{
float bforef, bfooff, t1;
if(rx_mode == MODE_SSB)sc[SC_FREQ_READOUT]++;
if(use_bfo == 0)
{
rx_daout_cos=1;
rx_daout_sin=0;
rx_daout_phstep_sin=0;
rx_daout_phstep_cos=1;
bfo_xpixel=-1;
bfo10_xpixel=-1;
bfo100_xpixel=-1;
return;
}
if(bfo_xpixel > 0)
{
if(bg_filterfunc_y[bfo_xpixel] > 0)
lir_setpixel(bfo_xpixel,bg_filterfunc_y[bfo_xpixel],14);
if(bg_filterfunc_y[bfo10_xpixel] > 0)
lir_setpixel(bfo10_xpixel,bg_filterfunc_y[bfo10_xpixel],14);
if(bg_filterfunc_y[bfo100_xpixel] > 0)
lir_setpixel(bfo100_xpixel,bg_filterfunc_y[bfo100_xpixel],14);
if(bg_carrfilter_y[bfo_xpixel] > 0)
lir_setpixel(bfo_xpixel,bg_carrfilter_y[bfo_xpixel],14);
if(bg_carrfilter_y[bfo10_xpixel] > 0)
lir_setpixel(bfo10_xpixel,bg_carrfilter_y[bfo10_xpixel],14);
if(bg_carrfilter_y[bfo100_xpixel] > 0)
lir_setpixel(bfo100_xpixel,bg_carrfilter_y[bfo100_xpixel],14);
}
// When we arrive here only bg.bfo_freq is defined.
// Set up the other variables we need that depend on it.
make_new_daout_upsamp();
t1=(2*PI_L*bg.bfo_freq)/genparm[DA_OUTPUT_SPEED];
rx_daout_phstep_cos=cos(t1);
rx_daout_phstep_sin=sin(t1);
bforef=bg_first_xpixel+0.5+bg.pixels_per_point*(fft3_size/2-bg_first_xpoint);
bfooff=bg.pixels_per_point*bg.bfo_freq/bg_hz_per_pixel;
bfo_xpixel=bforef+bfooff;
if(bfo_xpixel < bg_first_xpixel)bfo_xpixel=bg_first_xpixel;
if(bfo_xpixel > bg_last_xpixel)bfo_xpixel=bg_last_xpixel;
bfo10_xpixel=bforef+0.1*bfooff;
if(bfo10_xpixel < bg_first_xpixel)bfo10_xpixel=bg_first_xpixel;
if(bfo10_xpixel > bg_last_xpixel)bfo10_xpixel=bg_last_xpixel;
bfo100_xpixel=bforef+0.01*bfooff;
if(bfo100_xpixel < bg_first_xpixel)bfo100_xpixel=bg_first_xpixel;
if(bfo100_xpixel > bg_last_xpixel)bfo100_xpixel=bg_last_xpixel;
lir_line(bfo100_xpixel, bg_y0,bfo100_xpixel,bg_y1,12);
if(kill_all_flag) return;
lir_line(bfo10_xpixel, bg_y1-1,bfo10_xpixel,bg_y2,12);
if(kill_all_flag) return;
lir_line(bfo_xpixel, bg_y2-1,bfo_xpixel,bg_y3,12);
}
void chk_bg_avgnum(void)
{
if(fft3_blocktime*bg.fft_avgnum > genparm[BASEBAND_STORAGE_TIME])
bg.fft_avgnum=genparm[BASEBAND_STORAGE_TIME]/fft3_blocktime;
if(bg.fft_avgnum >9999)bg.fft_avgnum=9999;
if(bg.fft_avgnum <1)bg.fft_avgnum=1;
}
void clear_agc(void)
{
// The AGC attack is operated from two series connected low pass filters.
// followed by a peak detector.
// The AGC is in mix2.c
rx_agc_factor1=1;
rx_agc_factor2=1;
rx_agc_sumpow1=0;
rx_agc_sumpow2=0;
rx_agc_sumpow3=0;
rx_agc_sumpow4=0;
rx_agc_fastsum1=0;
rx_agc_fastsum2=0;
rx_agc_fast_factor1=pow(0.5,2000./baseband_sampling_speed);
rx_agc_fast_factor2=1-rx_agc_fast_factor1;
agc_attack_factor1=pow(0.5,1000./(baseband_sampling_speed*(1<<bg.agc_attack)));
agc_release_factor=pow(0.5,500./(baseband_sampling_speed*(1<<bg.agc_release)));
agc_attack_factor2=1-agc_attack_factor1;
bg_agc_hang_pts=0.01*baseband_sampling_speed*pow(1.7,(float)(bg.agc_hang));
if(bg_agc_hang_pts > baseband_size/2)bg_agc_hang_pts=baseband_size/2;
}
/*void construct_fir(int win, int siz, int n, int *points, int ct,
float *fir, float small)
*/
void construct_fir(int win, int siz, int n, int *points, int ct,
float *fir, float zsmall)
{
int i,j,k,ib,ic,ja,jb,cutoff;
float t1,t2;
float *firbuf;
float *fir_window;
unsigned short int *fir_permute;
COSIN_TABLE *fir_tab;
cutoff=ct;
if(cutoff < 1)cutoff=1;
if(cutoff>=siz/2)cutoff=siz/2-1;
// Construct a FIR filter of size siz with a cut-off frequency cutoff.
// The array of FIR filter coefficients is the pulse response of a FIR
// filter. Get it by taking the FFT.
// We use only the real half of a complex FFT.
firbuf=malloc(siz*(3*sizeof(float)+sizeof(short int)+sizeof(COSIN_TABLE)/2));
if(firbuf == NULL)
{
lirerr(493367);
return;
}
fir_window=&firbuf[siz*2];
fir_permute=(void*)(&fir_window[siz]);
fir_tab=(void*)(&fir_permute[siz]);
init_fft(1,n, siz, fir_tab, fir_permute);
make_window(1,siz, win, fir_window);
firbuf[0]=1;
firbuf[1]=0;
jb=siz-1;
for(ja=1; ja<cutoff; ja++)
{
firbuf[2*ja ]=1;
firbuf[2*jb ]=1;
firbuf[2*ja+1]=0;
firbuf[2*jb+1]=0;
jb--;
}
for(ja=cutoff; ja<siz/2; ja++)
{
firbuf[2*ja ]=0;
firbuf[2*jb ]=0;
firbuf[2*ja+1]=0;
firbuf[2*jb+1]=0;
jb--;
}
firbuf[2*jb ]=0;
firbuf[2*jb+1]=0;
for( i=0; i<siz/2; i++)
{
t1=firbuf[2*i ];
t2=firbuf[siz+2*i ];
firbuf[2*i ]=t1+t2;
firbuf[siz+2*i ]=fir_tab[i].cos*(t1-t2);
firbuf[siz+2*i+1]=fir_tab[i].sin*(t1-t2);
}
#if IA64 == 0 && CPU == CPU_INTEL
asmbulk_of_dif(siz, n, firbuf, fir_tab, yieldflag_ndsp_fft3);
#else
bulk_of_dif(siz, n, firbuf, fir_tab, yieldflag_ndsp_fft3);
#endif
for(i=0; i < siz; i+=2)
{
ib=fir_permute[i];
ic=fir_permute[i+1];
fir[ib]=firbuf[2*i ]+firbuf[2*i+2];
fir[ic]=firbuf[2*i ]-firbuf[2*i+2];
}
// Now take the effects of our window into account.
// Note the order in which fir_window is stored.
for(i=0; i<siz/2; i++)
{
fir[i]*=fir_window[2*i];
fir[siz/2+i]*=fir_window[2*i+1];
}
free(firbuf);
// The FIR filter must be symmetric. Actually forcing symmetry
// might reduce rounding errors slightly.
for(i=1; i<siz/2; i++)
{
fir[i]=0.5*(fir[i]+fir[siz-i]);
fir[siz-i]=fir[i];
}
// There is no reason to make the FIR filter extend outside
// the range where the coefficients are below zsmall (supplied parameter).
t1=zsmall*fir[siz/2];
k=0;
while(fabs(fir[k]) < t1)k++;
j=k;
points[0]=0;
while(k<=siz-j-1)
{
fir[points[0]]=fir[k];
k++;
points[0]++;
}
k=points[0];
if(k<siz)memset(&fir[k],0,siz-k);
// Normalize the FIR filter.
t1=0;
for(i=0; i<points[0]; i++)
{
t1+=fir[i];
}
t1=1/t1;
for(i=0; i<points[0]; i++)
{
fir[i]*=t1;
}
}
void init_basebmem(void)
{
float t1, t2;
int i, k, clr_size;
// Sampling rate for baseband has changed.
// Set flag to flush old data and reinit output.
reinit_baseb=FALSE;
lir_sched_yield();
if( (cg.oscill_on&6) != 0)
{
clear_cg_traces();
cg.oscill_on=1;
cg_osc_ptr=0;
}
halt_rx_output();
if(kill_all_flag)return;
if(baseband_handle != NULL)
{
baseband_handle=chk_free(baseband_handle);
}
// Make the daout buffer big enough to hold data for at least 6
// times longer than the rate at which the wideband thread posts
// to the narrowband thread.
t1=(6*fftx_size)/ui.rx_ad_speed;
// Make sure minimum is 0.5 seconds
if(t1<0.5)t1=0.5;
t1*=genparm[DA_OUTPUT_SPEED];
// and make sure we can hold 8192 samples
if(t1 < 8192)t1=8192;
daout_size=t1;
if(daout_size < 8*snd[RXDA].block_frames)daout_size=8*snd[RXDA].block_frames;
// Do not use snd[RXDA].framesize since bytes or channels may have changed.
daout_size*=rx_daout_bytes*rx_daout_channels*2;
make_power_of_two(&daout_size);
t1=3*(float)(daout_size)/genparm[DA_OUTPUT_SPEED];
if(t1<genparm[BASEBAND_STORAGE_TIME])t1=genparm[BASEBAND_STORAGE_TIME];
// Allocate memory for transformation from fft3 to the baseband.
// We are already in the baseband but the filter in use may allow
// a reduction of the sampling speed.
baseband_size=t1*baseband_sampling_speed;
make_power_of_two(&baseband_size);
daout_bufmask=daout_size-1;
cg_size=2+(COH_SIDE*text_width)/3;
cg_size&=0xfffffffe;
k=2+bg_flatpoints+2*bg_curvpoints;
if(genparm[THIRD_FFT_SINPOW] > 3)k+=2;
if(genparm[THIRD_FFT_SINPOW] == 8)k+=2;
cg_code_unit=0.5*(float)(mix2.size)/k;
cg_decay_factor=pow(0.5,0.2/cg_code_unit);
cw_waveform_max=14*cg_code_unit;
if(cw_waveform_max >= (int)(fftn_tmp_bytes/(2*sizeof(float))))
{
cw_waveform_max=fftn_tmp_bytes/(2*sizeof(float))-1;
}
cg_osc_offset=mix2.size+50*cg_code_unit;
while(baseband_size < 4*cg_osc_offset)baseband_size*=2;
if(baseband_size < 8*(int)mix2.size)baseband_size=8*mix2.size;
reduce:;
if(baseband_size < 4*cg_osc_offset)
{
cg_osc_offset=baseband_size/4;
}
cg_osc_offset_inc=cg_osc_offset/2;
max_cwdat=MAX_CW_PARTS*baseband_size/cg_code_unit;
baseband_mask=baseband_size-1;
baseband_neg=(7*baseband_size)>>3;
baseband_sizhalf=baseband_size>>1;
// The time stored in the baseband buffers is
// baseband_size/baseband_sampling_speed, the same time is contained in
// the basblock buffers in mix2.size/2 fewer points.
// Find out the number of basblock points that correspond to
// 5 seconds, the time constant for dB meter peak hold.
basblock_size=2*baseband_size/mix2.size;
basblock_mask=basblock_size-1;
basblock_hold_points=5*basblock_size*baseband_sampling_speed/baseband_size;
if(basblock_hold_points<3)basblock_hold_points=3;
if(basblock_hold_points>basblock_mask)basblock_hold_points=basblock_mask;
// When listening to wideband signals, the time between basblock
// points may become short.
// Make sure we do not update the coherent graph too often,
// graphics may be rather slow.
cg_update_interval=basblock_hold_points/20;
cg_update_count=0;
clear_agc();
fft3_interleave_ratio=make_interleave_ratio(THIRD_FFT_SINPOW);
// We get signals from back transformation of fft3.
// We must use an interleave ratio that makes the interleave points
// go even up in mix2.size.
mix2.interleave_points=fft3_interleave_ratio*mix2.size;
mix2.interleave_points&=0xfffffffe;
mix2.new_points=mix2.size-mix2.interleave_points;
fft3_interleave_points=mix2.interleave_points*(fft3_size/mix2.size);
fft3_interleave_ratio=(float)(fft3_interleave_points)/fft1_size;
fft3_new_points=fft3_size-fft3_interleave_points;
fft3_blocktime=(float)(fft3_new_points)/timf3_sampling_speed;
if( rx_mode == MODE_FM )
{
// ****************** fm_audiofil ***************************
// We need a low pass filter with cut-off as specified by the user.
// Make the cross-over region 250 Hz, but degrade the steepness
// in case the baseband sampling speed is very high.
fm_audiofil_size=baseband_sampling_speed/250;
if(fm_audiofil_size > 512)fm_audiofil_size=512;
fm_audiofil_n=make_power_of_two(&fm_audiofil_size);
}
if( rx_mode == MODE_FM && baseband_sampling_speed > 105000)
{
// ****************** fmfil70 ************************
// We need a low pass filter with cut-off at about 70 kHz.
// Construct a FIR filter that will allow the cross-over region
// to be about 5 kHz.
// This filter will attenuate by about 100 dB above 80 kHz so we
// can resample the output if the baseband sampling rate is above 160kHz.
// For FM processing we have no reason to keep data in memory for
// a long time. Make the buffer one second.
#if NET_BASEBRAW_MODE == WFM_FM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_AM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_SYNTHETIZED_FROM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_SUBTRACT_FROM_FIRST_LOWPASS
fmfil70_size=baseband_sampling_speed/2500;
#else
fmfil70_size=baseband_sampling_speed/5000;
#endif
fmfil70_n=make_power_of_two(&fmfil70_size);
fm1_resample_ratio=baseband_sampling_speed/160000;
fm1_sampling_speed=baseband_sampling_speed/fm1_resample_ratio;
fm1_size=fm1_sampling_speed;
make_power_of_two(&fm1_size);
fm1_mask=fm1_size-1;
// ****************** fmfil55 ************************
// We need a low pass filter with cut-off at 55 kHz.
// Construct a FIR filter that will allow the cross-over region
// to be about 2 kHz.
fmfil55_size=baseband_sampling_speed/2000;
fmfil55_n=make_power_of_two(&fmfil55_size);
// ****************** fmfil ***************************
// We need a low pass filter with cut-off at about 17 kHz
// for wideband FM.
fmfil_size=baseband_sampling_speed/2000;
fmfil_n=make_power_of_two(&fmfil_size);
// ******************************************************
// ****************** fmfil_rds ***************************
// We need a low pass filter with cut-off at 1.8 kHz for RDS.
// Construct a FIR filter that will allow the cross-over region
// to be about 1 kHz.
fmfil_rds_size=baseband_sampling_speed/1000;
fmfil_rds_n=make_power_of_two(&fmfil_rds_size);
// ******************************************************
// For wideband FM we look for a pilot tone at 19 kHz.
// Make a filter with a bandwidth of about 100 Hz
fm_pilot_size=0.01*baseband_sampling_speed;
}
else
{
fm_pilot_size=0;
}
// ********************************************************
init_memalloc(basebmem, MAX_BASEB_ARRAYS);
mem(1,&baseb_out,baseband_size*2*baseb_channels*sizeof(float),0);
mem(2,&baseb_carrier,baseband_size*2*sizeof(float),0);
mem(3,&baseb_raw,baseband_size*2*sizeof(float),0);
mem(4,&baseb_raw_orthog,baseband_size*2*sizeof(float),0);
mem(5,&baseb,baseband_size*2*sizeof(float),0);
mem(6,&baseb_totpwr,baseband_size*sizeof(float),0);
mem(7,&baseb_carrier_ampl,baseband_size*sizeof(float),0);
mem(8,&mix2.permute,mix2.size*sizeof(short int),0);
mem(9,&mix2.table,mix2.size*sizeof(COSIN_TABLE)/2,0);
mem(10,&daout,daout_size,0);
mem(11,&cg_map,cg_size*cg_size*sizeof(float),0);
mem(13,&cg_traces,CG_MAXTRACE*MAX_CG_OSCW*sizeof(short int),0);
mem(16,&basblock_maxpower,basblock_size*sizeof(float),0);
mem(17,&basblock_avgpower,basblock_size*sizeof(float),0);
mem(171,&mix2.window,(mix2.size/2+1)*sizeof(float),0);
mem(172,&mix2.cos2win,mix2.new_points*sizeof(float),0);
mem(173,&mix2.sin2win,mix2.new_points*sizeof(float),0);
if(bg.agc_flag != 0)
{
mem(18,&baseb_agc_level,bg.agc_flag*baseband_size*sizeof(float),0);
mem(1892,&baseb_agc_det,bg.agc_flag*baseband_size*sizeof(float),0);
mem(14,&baseb_upthreshold,bg.agc_flag*baseband_size*sizeof(float),0);
mem(15,&baseb_threshold,bg.agc_flag*baseband_size*sizeof(float),0);
}
if(genparm[CW_DECODE_ENABLE] != 0)
{
if(bg.agc_flag == 0)
{
mem(14,&baseb_upthreshold,baseband_size*sizeof(float),0);
mem(15,&baseb_threshold,baseband_size*sizeof(float),0);
}
mem(27,&baseb_ramp,baseband_size*sizeof(short int),0);
keying_spectrum_size=mix2.size/cg_code_unit;
if(keying_spectrum_size > (int)mix2.size/2)keying_spectrum_size=mix2.size/2;
mem(19,&baseb_envelope,baseband_size*2*sizeof(float),0);
mem(21,&dash_waveform,cw_waveform_max*2*sizeof(float),0);
mem(215,&dash_wb_waveform,cw_waveform_max*2*sizeof(float),0);
mem(225,&dot_wb_waveform,cw_waveform_max*sizeof(float),0);
mem(23,&baseb_fit,baseband_size*2*sizeof(float),0);
mem(24,&cw_carrier_window,mix2.size*sizeof(float),0);
mem(25,&mix2_tmp,2*mix2.size*sizeof(float),0);
mem(26,&mix2_pwr,mix2.size*sizeof(float),0);
mem(28,&baseb_tmp,baseband_size*2*sizeof(float),0);
mem(281,&baseb_sho1,baseband_size*2*sizeof(float),0);
mem(282,&baseb_sho2,baseband_size*2*sizeof(float),0);
mem(283,&baseb_wb_raw,baseband_size*2*sizeof(float),0);
mem(30,&cw,max_cwdat*sizeof(MORSE_DECODE_DATA),0);
mem(31,&keying_spectrum,keying_spectrum_size*sizeof(float),0);
mem(285,&baseb_clock,baseband_size*sizeof(float),0);
}
if(rx_mode == MODE_FM)
{
mem(311,&baseb_fm_demod,baseband_size*2*baseb_channels*sizeof(float),0);
mem(1311,&fm_audiofil_fir,fm_audiofil_size*sizeof(float),0);
mem(314,&baseb_fm_phase,baseband_size*baseb_channels*sizeof(float),0);
if(fm_pilot_size > 0)
{
if(baseb_channels != 1)
{
lirerr(873105);
return;
}
mem(312,&baseb_fm_demod_low,baseband_size*baseb_channels*sizeof(float),0);
mem(313,&baseb_fm_demod_high,baseband_size*baseb_channels*sizeof(float),0);
mem(320,&fm_pilot_tone,2*fm_pilot_size*sizeof(float),0);
mem(321,&baseb_fm_pil2,baseband_size*baseb_channels*sizeof(float),0);
mem(322,&baseb_fm_pil3,baseband_size*2*baseb_channels*sizeof(float),0);
mem(324,&fmfil55_fir,fmfil55_size*sizeof(float),0);
mem(325,&baseb_fm_pil2det,baseband_size*baseb_channels*sizeof(float),0);
mem(326,&baseb_fm_pil3det,baseband_size*2*baseb_channels*sizeof(float),0);
mem(327,&baseb_fm_sumchan,baseband_size*baseb_channels*sizeof(float),0);
mem(328,&baseb_fm_diffchan,baseband_size*baseb_channels*sizeof(float),0);
mem(329,&baseb_fm_rdsraw,2*baseband_size*baseb_channels*sizeof(float),0);
mem(330,&fmfil_fir,fmfil_size*sizeof(float),0);
mem(331,&fmfil_rds_fir,fmfil_rds_size*sizeof(float),0);
mem(332,&baseb_fm_composite,baseband_size*baseb_channels*sizeof(float),0);
mem(333,&fmfil70_fir,fmfil70_size*sizeof(float),0);
mem(334,&fm1_all,fm1_size*sizeof(float),0);
}
}
if( (ui.network_flag&NET_RXOUT_BASEBRAW) != 0)
{
#if NET_BASEBRAW_MODE == WFM_FM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_AM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_FM_FULL_BANDWIDTH || \
NET_BASEBRAW_MODE == WFM_FM_FIRST_LOWPASS_UPSAMP || \
NET_BASEBRAW_MODE == WFM_STEREO_LOW || \
NET_BASEBRAW_MODE == WFM_STEREO_HIGH
basebraw_sampling_speed=baseband_sampling_speed;
basebraw_ad_channels=1;
basebraw_rf_channels=1;
basebraw_mode=DWORD_INPUT;
basebraw_passband_direction=1;
#endif
#if NET_BASEBRAW_MODE == WFM_FM_FIRST_LOWPASS_RESAMP
basebraw_sampling_speed=fm1_sampling_speed;
basebraw_ad_channels=1;
basebraw_rf_channels=1;
basebraw_mode=DWORD_INPUT;
basebraw_passband_direction=1;
#endif
#if NET_BASEBRAW_MODE == BASEBAND_IQ || \
NET_BASEBRAW_MODE == WFM_SYNTHETIZED_FROM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_SUBTRACT_FROM_FIRST_LOWPASS
basebraw_sampling_speed=baseband_sampling_speed;
basebraw_ad_channels=2*ui.rx_rf_channels;
basebraw_rf_channels=ui.rx_rf_channels;
basebraw_mode=DWORD_INPUT+IQ_DATA+DIGITAL_IQ;
basebraw_passband_direction=-1;
#endif
#if NET_BASEBRAW_MODE == WFM_AM_FULL_BANDWIDTH
basebraw_sampling_speed=baseband_sampling_speed;
basebraw_ad_channels=1;
basebraw_rf_channels=1;
basebraw_mode=DWORD_INPUT;
basebraw_passband_direction=1;
#endif
basebrawnet_block_bytes=(basebraw_ad_channels*basebraw_rf_channels*
basebraw_sampling_speed)/ui.max_dma_rate;
make_power_of_two(&basebrawnet_block_bytes);
// Allocate space for 0.3 seconds of data.
basebrawnet_size=0.3*basebraw_sampling_speed*2*
ui.rx_rf_channels*sizeof(int);
make_power_of_two(&basebrawnet_size);
if(basebrawnet_size/basebrawnet_block_bytes < 8)
basebrawnet_size=8*basebrawnet_block_bytes ;
basebrawnet_mask=basebrawnet_size-1;
mem(7578,&basebraw_netsend_buffer,basebrawnet_size,0);
}
baseband_totmem=memalloc(&baseband_handle,"baseband");
if(baseband_totmem == 0)
{
lir_status=LIR_OK;
baseband_size/=2;
lir_pixwrite(bg.xleft+text_width,bg.ybottom-4*text_height,"BUFFERS REDUCED");
goto reduce;
}
k=fft3_size/mix2.size;
mix2.n=fft3_n;
while(k>1)
{
mix2.n--;
k/=2;
}
if(mix2.n > 12)
{
yieldflag_ndsp_mix2=TRUE;
}
else
{
yieldflag_ndsp_mix2=FALSE;
}
if(genparm[SECOND_FFT_ENABLE] == 0)
{
if(ui.max_blocked_cpus > 1)yieldflag_ndsp_mix2=FALSE;
}
else
{
if(ui.max_blocked_cpus > 3)yieldflag_ndsp_mix2=FALSE;
}
prepare_mixer(&mix2, THIRD_FFT_SINPOW);
if(genparm[CW_DECODE_ENABLE] != 0)
{
make_window(4,mix2.size, genparm[THIRD_FFT_SINPOW], cw_carrier_window);
}
memset(basblock_maxpower,0,basblock_size*sizeof(float));
memset(basblock_avgpower,0,basblock_size*sizeof(float));
clr_size=4*mix2.size;
if(clr_size > baseband_size)clr_size=baseband_size;
lir_sched_yield();
clear_baseb_arrays(0,clr_size);
if(genparm[CW_DECODE_ENABLE] != 0)
{
for(i=0; i<max_cwdat; i++)
{
cw[i].tmp=-1;
cw[i].unkn=-1;
}
lir_sched_yield();
memset(keying_spectrum,0,keying_spectrum_size*sizeof(float));
}
memset(baseb_out,0,clr_size*2*baseb_channels*sizeof(float));
baseb_pa=0;
baseb_py=0;
baseb_wts=0;
baseb_fx=0;
baseb_pf=0;
fm1_pa=0;
fm1_px=0;
rx_daout_cos=1;
rx_daout_sin=0;
if(kill_all_flag)return;
am_dclevel1=0;
am_dclevel2=0;
am_dclevel_factor1=pow(0.5,2000./(baseband_sampling_speed*(1<<bg.agc_release)));
am_dclevel_factor2=1-am_dclevel_factor1;
baseb_indicator_block=(baseband_mask+1)/INDICATOR_SIZE;
daout_indicator_block=(daout_bufmask+1)/INDICATOR_SIZE;
// *********************** pilot tone filter *****************************
if(fm_pilot_size > 0)
{
t1=0;
t2=2*PI_L*19000./baseband_sampling_speed;
for(i=0; i<fm_pilot_size; i++)
{
fm_pilot_tone[2*i ]=cos(t1);
fm_pilot_tone[2*i+1]=sin(t1);
t1+=t2;
}
// *********************** fmfil70 *********************************
#if NET_BASEBRAW_MODE == WFM_FM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_AM_FIRST_LOWPASS || \
NET_BASEBRAW_MODE == WFM_SYNTHETIZED_FROM_FIRST_LOWPASS
i=fmfil70_size*65000/baseband_sampling_speed;
#else
i=fmfil70_size*68000/baseband_sampling_speed;
#endif
construct_fir(7,fmfil70_size, fmfil70_n,
&fmfil70_points, i, fmfil70_fir, 0.00001);
// *********************** fmfil55 *********************************
i=fmfil55_size*53000/baseband_sampling_speed;
construct_fir(7,fmfil55_size, fmfil55_n,
&fmfil55_points, i, fmfil55_fir, 0.00001);
// *********************** fmfil *********************************
t1=15000;
if(genparm[DA_OUTPUT_SPEED] < 40000)
{
t1*=genparm[DA_OUTPUT_SPEED]/40000.;
}
i=fmfil_size*t1/baseband_sampling_speed;
construct_fir(7,fmfil_size, fmfil_n,
&fmfil_points, i, fmfil_fir, 0.00001);
// *********************** fmfil_rds ********************************
i=fmfil_rds_size*4000/baseband_sampling_speed;
construct_fir(7,fmfil_rds_size, fmfil_rds_n,
&fmfil_rds_points, i, fmfil_rds_fir, 0.0001);
// *****************************************************************
// collect the RDS phase in a leaky integrator of about 0.01 second.
rds_f1=pow(0.5,100/baseband_sampling_speed);
rds_f2=1-rds_f1;
rds_phase=0;
rds_power=0;
}
DEB"\nbaseband_sampling_speed=%f",baseband_sampling_speed);
}
void update_squelch_buttons(void)
{
int colour;
char s[40];
if(bg_filter_points > 5 && 2*bg_filter_points < bg_xpoints)
{
colour=BG_ACTIVE_BUTTON_COLOR;
}
else
{
colour=BG_INACTIVE_BUTTON_COLOR;
}
settextcolor(colour);
sprintf(s,"%2d",bg.squelch_level);
show_button(&bgbutt[BG_SQUELCH_LEVEL],s);
if(bg.squelch_level == 0)colour=3;
settextcolor(colour);
sprintf(s,"%d",bg.squelch_time);
show_button(&bgbutt[BG_SQUELCH_TIME],s);
sprintf(s,"%2d",bg.squelch_point);
show_button(&bgbutt[BG_SQUELCH_POINT],s);
settextcolor(7);
}
void make_bg_filter(void)
{