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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@346 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
69 lines
1.5 KiB
Fortran
69 lines
1.5 KiB
Fortran
subroutine spec(brightness,contrast,logmap,ngain,nspeed,a)
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parameter (NX=750,NY=130,NTOT=NX*NY,NFFT=32768)
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! Input:
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integer brightness,contrast !Display parameters
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integer ngain !Digital gain for input audio
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integer nspeed !Scrolling speed index
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! Output:
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integer*2 a(NTOT) !Pixel values for NX x NY array
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logical first
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integer nstep(4)
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integer b0,c0
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real s(NX,NY)
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common/spcom/ss(4,322,NFFT) !169 MB: half-symbol spectra
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include 'gcom1.f90'
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include 'gcom2.f90'
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include 'gcom3.f90'
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include 'gcom4.f90'
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data first/.true./
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data nstep/16,10,5,3/ !Integration limits
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save
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if(first) then
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df=96000.0/nfft
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call zero(a,NX*NY/2)
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first=.false.
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endif
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nadd=nstep(nspeed)
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nlines=322/nadd
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call zero(s,NX*NY)
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k=0
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ia=9001
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ib=9750
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do j=1,nlines
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k=k+1
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do i=ia,ib
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s(i,j)=s(i,j) + ss(1,k,i) + ss(3,k,i)
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enddo
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enddo
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newpts=NX*nlines
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do i=newpts+1,NX*NY
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a(i)=a(i-newpts)
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enddo
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gain=40*sqrt(nstep(nspeed)/5.0) * 5.0**(0.01*contrast)
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gamma=1.3 + 0.01*contrast
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offset=(brightness+64.0)/2
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k=0
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do j=1,nlines
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do i=ia,ib
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k=k+1
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n=0
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x=s(i,j)
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! if(s(i).gt.0.0 .and. logmap.eq.1) n=gain*log10(0.001*s(i)) &
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! + offset + 20
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if(x.gt.0.0 .and. logmap.eq.0) n=(20.0*x)**gamma + offset
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n=min(252,max(0,n))
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a(k)=n
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enddo
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enddo
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return
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end subroutine spec
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