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module ft8_decode
parameter (MAXFOX=1000)
character*12 c2fox(MAXFOX)
character*4 g2fox(MAXFOX)
integer nsnrfox(MAXFOX)
integer nfreqfox(MAXFOX)
integer n30fox(MAXFOX)
integer n30z
integer nfox
type :: ft8_decoder
procedure(ft8_decode_callback), pointer :: callback
contains
procedure :: decode
end type ft8_decoder
abstract interface
subroutine ft8_decode_callback (this,sync,snr,dt,freq,decoded,nap,qual)
import ft8_decoder
implicit none
class(ft8_decoder), intent(inout) :: this
real, intent(in) :: sync
integer, intent(in) :: snr
real, intent(in) :: dt
real, intent(in) :: freq
character(len=37), intent(in) :: decoded
integer, intent(in) :: nap
real, intent(in) :: qual
end subroutine ft8_decode_callback
end interface
contains
subroutine decode(this,callback,iwave,nQSOProgress,nfqso,nftx,newdat, &
nutc,nfa,nfb,ndepth,ncontest,nagain,lft8apon,lapcqonly, &
napwid,mycall12,hiscall12,hisgrid6)
! use wavhdr
use timer_module, only: timer
include 'ft8/ft8_params.f90'
! type(hdr) h
class(ft8_decoder), intent(inout) :: this
procedure(ft8_decode_callback) :: callback
parameter (MAXCAND=300)
real s(NH1,NHSYM)
real sbase(NH1)
real candidate(3,MAXCAND)
real dd(15*12000)
logical, intent(in) :: lft8apon,lapcqonly,nagain
logical newdat,lsubtract,ldupe
character*12 mycall12,hiscall12,mycall12_0
character*6 hisgrid6
integer*2 iwave(15*12000)
integer apsym2(58)
character datetime*13,msg37*37
! character message*22
character*37 allmessages(100)
integer allsnrs(100)
data mycall12_0/'dummy'/
save s,dd,mycall12_0
if(mycall12.ne.mycall12_0) then
call my_hash(mycall12)
mycall12_0=mycall12
endif
this%callback => callback
write(datetime,1001) nutc !### TEMPORARY ###
1001 format("000000_",i6.6)
call ft8apset(mycall12,hiscall12,apsym2)
dd=iwave
ndecodes=0
allmessages=' '
allsnrs=0
ifa=nfa
ifb=nfb
if(nagain) then
ifa=nfqso-10
ifb=nfqso+10
endif
! For now:
! ndepth=1: no subtraction, 1 pass, belief propagation only
! ndepth=2: subtraction, 3 passes, belief propagation only
! ndepth=3: subtraction, 3 passes, bp+osd
if(ndepth.eq.1) npass=1
if(ndepth.ge.2) npass=3
do ipass=1,npass
newdat=.true. ! Is this a problem? I hijacked newdat.
syncmin=1.5
if(ipass.eq.1) then
lsubtract=.true.
if(ndepth.eq.1) lsubtract=.false.
elseif(ipass.eq.2) then
n2=ndecodes
if(ndecodes.eq.0) cycle
lsubtract=.true.
elseif(ipass.eq.3) then
if((ndecodes-n2).eq.0) cycle
lsubtract=.false.
endif
call timer('sync8 ',0)
maxc=MAXCAND
call sync8(dd,ifa,ifb,syncmin,nfqso,maxc,s,candidate, &
ncand,sbase)
call timer('sync8 ',1)
do icand=1,ncand
sync=candidate(3,icand)
f1=candidate(1,icand)
xdt=candidate(2,icand)
xbase=10.0**(0.1*(sbase(nint(f1/3.125))-40.0))
nsnr0=min(99,nint(10.0*log10(sync) - 25.5)) !### empirical ###
call timer('ft8b ',0)
call ft8b(dd,newdat,nQSOProgress,nfqso,nftx,ndepth,lft8apon, &
lapcqonly,napwid,lsubtract,nagain,ncontest,iaptype,mycall12, &
hiscall12,sync,f1,xdt,xbase,apsym2,nharderrors,dmin, &
nbadcrc,iappass,iera,msg37,xsnr)
call timer('ft8b ',1)
nsnr=nint(xsnr)
xdt=xdt-0.5
hd=nharderrors+dmin
if(nbadcrc.eq.0) then
ldupe=.false.
do id=1,ndecodes
if(msg37.eq.allmessages(id).and.nsnr.le.allsnrs(id)) ldupe=.true.
enddo
if(.not.ldupe) then
ndecodes=ndecodes+1
allmessages(ndecodes)=msg37
allsnrs(ndecodes)=nsnr
endif
! write(81,1004) nutc,ncand,icand,ipass,iaptype,iappass, &
! nharderrors,dmin,hd,min(sync,999.0),nint(xsnr), &
! xdt,nint(f1),msg37
!1004 format(i6.6,2i4,3i2,i3,3f6.1,i4,f6.2,i5,2x,a37)
! flush(81)
if(.not.ldupe .and. associated(this%callback)) then
qual=1.0-(nharderrors+dmin)/60.0 ! scale qual to [0.0,1.0]
call this%callback(sync,nsnr,xdt,f1,msg37,iaptype,qual)
endif
endif
enddo
enddo
return
end subroutine decode
end module ft8_decode
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