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https://github.com/saitohirga/WSJT-X.git
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53c2f619f2
Working toward on-the-fly computation of symbol spectra. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@429 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
89 lines
2.0 KiB
Fortran
89 lines
2.0 KiB
Fortran
subroutine spec(brightness,contrast,ngain,nspeed,a,a2)
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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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integer*2 a2(NTOT) !Pixel values for NX x NY array
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logical first
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integer nstep(5)
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integer b0,c0
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real s(NFFT,NY)
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! Could save memory by doing the averaging-by-7 (or 10?) of ss5 in symspec.
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common/spcom/ip0,ss(4,322,NFFT),ss5(322,NFFT),savg(4,NFFT)
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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/28,20,14,10,7/ !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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call zero(a2,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,NFFT*NY)
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k=0
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imid=nint(1000.0*(fselect-125.0+48.0)/df)
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ia=imid-374
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ib=ia+749
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do j=1,nlines
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do n=1,nadd
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k=k+1
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do i=1,NFFT
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s(i,j)=s(i,j) + ss5(k,i)
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enddo
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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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a2(i)=a2(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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fac=20.0/nadd
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nbpp=NFFT/NX !Bins per pixel in wide waterfall
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do j=nlines,1,-1 !Reverse order so last will be on top
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do i=1,NX
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k=k+1
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n=0
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x=0.
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do ii=(i-1)*nbpp+1,i*nbpp
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x=max(x,s(ii,j))
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enddo
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x=fac*x
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if(x.gt.0.0) n=(2.0*x)**gamma + offset
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n=min(252,max(0,n))
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a(k)=n
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n=0
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x=fac*s(ia+i-1,j)
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if(x.gt.0.0) n=(3.0*x)**gamma + offset
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n=min(252,max(0,n))
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a2(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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