mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-05 00:41:19 -05:00
9590ff5f43
but not used". git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@275 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
218 lines
5.4 KiB
Fortran
218 lines
5.4 KiB
Fortran
!---------------------------------------------------- spec
|
|
subroutine spec(brightness,contrast,logmap,ngain,nspeed,a)
|
|
|
|
! Called by SpecJT in its TopLevel Python code.
|
|
! Probably should use the "!f2py intent(...)" structure here.
|
|
|
|
! Input:
|
|
integer brightness,contrast !Display parameters
|
|
integer ngain !Digital gain for input audio
|
|
integer nspeed !Scrolling speed index
|
|
! Output:
|
|
integer*2 a(225000) !Pixel values for 750 x 300 array
|
|
|
|
real a0(225000) !Save the last 300 spectra
|
|
integer nstep(5)
|
|
integer b0,c0
|
|
real x(4096) !Data for FFT
|
|
complex c(0:2048) !Complex spectrum
|
|
real ss(2048) !Power spectrum
|
|
logical first
|
|
include 'gcom1.f90'
|
|
include 'gcom2.f90'
|
|
include 'gcom3.f90'
|
|
include 'gcom4.f90'
|
|
data jz/0/ !Number of spectral lines available
|
|
data nstep/15,10,5,2,1/ !Integration limits
|
|
data first/.true./
|
|
|
|
equivalence (x,c)
|
|
save
|
|
|
|
if(first) then
|
|
istep=2205
|
|
nfft=4096
|
|
nh=nfft/2
|
|
do i=1,nh
|
|
ss(i)=0.
|
|
enddo
|
|
df=11025.0/nfft
|
|
fac=2.0/10000.
|
|
nsum=0
|
|
iread=0
|
|
first=.false.
|
|
b0=-999
|
|
c0=-999
|
|
logmap0=-999
|
|
nspeed0=-999
|
|
nx=0
|
|
ncall=0
|
|
jza=0
|
|
rms=0.
|
|
endif
|
|
|
|
nmode=1
|
|
if(mode(1:4).eq.'JT65') nmode=2
|
|
if(mode.eq.'Echo') nmode=3
|
|
if(mode.eq.'JT6M') nmode=4
|
|
|
|
nlines=0
|
|
newdat=0
|
|
npts=iwrite-iread
|
|
if(ndiskdat.eq.1) then
|
|
npts=jzc/2048
|
|
npts=2048*npts
|
|
kread=0
|
|
if(nspeed.ge.6) then
|
|
call hscroll(a,nx)
|
|
nx=0
|
|
endif
|
|
endif
|
|
if(npts.lt.0) npts=npts+nmax
|
|
if(npts.lt.nfft) go to 900 !Not enough data available
|
|
|
|
10 continue
|
|
if(ndiskdat.eq.1) then
|
|
! Data read from disk
|
|
k=kread
|
|
do i=1,nfft
|
|
k=k+1
|
|
x(i)=0.4*d2c(k)
|
|
enddo
|
|
kread=kread+istep !Update pointer
|
|
else
|
|
! Real-time data
|
|
dgain=2.0*10.0**(0.005*ngain)
|
|
k=iread
|
|
do i=1,nfft
|
|
k=k+1
|
|
if(k.gt.nmax) k=k-nmax
|
|
x(i)=0.5*dgain*y1(k)
|
|
enddo
|
|
iread=iread+istep !Update pointer
|
|
if(iread.gt.nmax) iread=iread-nmax
|
|
endif
|
|
|
|
sum=0. !Get ave, rms of data
|
|
do i=1,nfft
|
|
sum=sum+x(i)
|
|
enddo
|
|
ave=sum/nfft
|
|
sq=0.
|
|
do i=1,nfft
|
|
d=x(i)-ave
|
|
sq=sq+d*d
|
|
x(i)=fac*d
|
|
enddo
|
|
rms1=sqrt(sq/nfft)
|
|
if(rms.eq.0) rms=rms1
|
|
rms=0.25*rms1 + 0.75*rms
|
|
|
|
if(ndiskdat.eq.0) then
|
|
level=0 !Compute S-meter level
|
|
if(rms.gt.0.0) then !Scale 0-100, steps = 0.4 dB
|
|
dB=20.0*log10(rms/800.0)
|
|
level=50 + 2.5*dB
|
|
if(level.lt.0) level=0
|
|
if(level.gt.100) level=100
|
|
endif
|
|
endif
|
|
|
|
if(nspeed.ge.6) then
|
|
call horizspec(x,brightness,contrast,a)
|
|
ncall=Mod(ncall+1,5)
|
|
if(ncall.eq.1 .or. nspeed.eq.7) newdat=1
|
|
if(ndiskdat.eq.1) then
|
|
npts=jzc-kread
|
|
else
|
|
npts=iwrite-iread
|
|
if(npts.lt.0) npts=npts+nmax
|
|
endif
|
|
if(npts.ge.4096) go to 10
|
|
go to 900
|
|
endif
|
|
|
|
call xfft2(x,nfft)
|
|
|
|
do i=1,nh !Accumulate power spectrum
|
|
ss(i)=ss(i) + real(c(i))**2 + aimag(c(i))**2
|
|
enddo
|
|
nsum=nsum+1
|
|
|
|
if(nsum.ge.nstep(nspeed)) then !Integrate for specified time
|
|
nlines=nlines+1
|
|
do i=225000,751,-1 !Move spectra up one row
|
|
a0(i)=a0(i-750) ! (will be "down" on display)
|
|
enddo
|
|
if(ndiskdat.eq.1 .and. nlines.eq.1) then
|
|
do i=1,750
|
|
a0(i)=255
|
|
enddo
|
|
do i=225000,751,-1
|
|
a0(i)=a0(i-750)
|
|
enddo
|
|
endif
|
|
|
|
if(nflat.gt.0) call flat2(ss,nh,nsum)
|
|
|
|
ia=1
|
|
if(nfrange.eq.2000) then
|
|
i0=182 + nint((nfmid-1500)/df)
|
|
if(i0.lt.0) ia=1-i0
|
|
else if(nfrange.eq.4000) then
|
|
i0=nint(nfmid/df - 752.0)
|
|
if(i0.lt.0) ia=1-i0/2
|
|
endif
|
|
do i=ia,750 !Insert new data in top row
|
|
if(nfrange.eq.2000) then
|
|
a0(i)=5*ss(i+i0)/nsum
|
|
else if(nfrange.eq.4000) then
|
|
smax=max(ss(2*i+i0),ss(2*i+i0-1))
|
|
a0(i)=5*smax/nsum
|
|
endif
|
|
enddo
|
|
nsum=0
|
|
newdat=1 !Flag for new spectrum available
|
|
do i=1,nh !Zero the accumulating array
|
|
ss(i)=0.
|
|
enddo
|
|
if(jz.lt.300) jz=jz+1
|
|
endif
|
|
|
|
if(ndiskdat.eq.1) then
|
|
npts=jzc-kread
|
|
else
|
|
npts=iwrite-iread
|
|
if(npts.lt.0) npts=npts+nmax
|
|
endif
|
|
|
|
if(npts.ge.4096) go to 10
|
|
|
|
! Compute pixel values
|
|
iz=750
|
|
logmap=0
|
|
if(brightness.ne.b0 .or. contrast.ne.c0 .or. logmap.ne.logmap0 .or. &
|
|
nspeed.ne.nspeed0 .or. nlines.gt.1) then
|
|
iz=225000
|
|
gain=40*sqrt(nstep(nspeed)/5.0) * 5.0**(0.01*contrast)
|
|
gamma=1.3 + 0.01*contrast
|
|
offset=(brightness+64.0)/2
|
|
b0=brightness
|
|
c0=contrast
|
|
logmap0=logmap
|
|
nspeed0=nspeed
|
|
endif
|
|
|
|
do i=1,iz
|
|
n=0
|
|
if(a0(i).gt.0.0 .and. logmap.eq.1) n=gain*log10(0.001*a0(i)) + offset + 20
|
|
if(a0(i).gt.0.0 .and. logmap.eq.0) n=(0.01*a0(i))**gamma + offset
|
|
n=min(252,max(0,n))
|
|
a(i)=n
|
|
enddo
|
|
|
|
900 continue
|
|
if(ndiskdat.eq.1) ndecoding=4
|
|
return
|
|
end subroutine spec
|