WSJT-X/lib/extract.f90

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3.9 KiB
Fortran
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subroutine extract(s3,nadd,mode65,ntrials,naggressive,ndepth,nflip, &
mycall_12,hiscall_12,hisgrid,nexp_decode,ncount,nhist,decoded, &
ltext,nft,qual)
! Input:
! s3 64-point spectra for each of 63 data symbols
! nadd number of spectra summed into s3
! nqd 0/1 to indicate decode attempt at QSO frequency
! Output:
! ncount number of symbols requiring correction (-1 for no KV decode)
! nhist maximum number of identical symbol values
! decoded decoded message (if ncount >=0)
! ltext true if decoded message is free text
! nft 0=no decode; 1=FT decode; 2=hinted decode
use prog_args !shm_key, exe_dir, data_dir
use packjt
use jt65_mod
Make Fortran profiling timer function a callback with a default null implementation Groundwork for calling the decoders directly from C/C++ threads. To access the timer module timer_module must now be used. Instrumented code need only use the module function 'timer' which is now a procedure pointer that is guaranteed to be associated (unless null() is assigned to it, which should not be done). The default behaviour of 'timer' is to do nothing. If a Fortran program wishes to profile code it should now use the timer_impl module which contains a default timer implementation. The main program should call 'init_timer([filename])' before using 'timer' or calling routines that are instrumented. If 'init_timer([filename])'. If it is called then an optional file name may be provided with 'timer.out' being used as a default. The procedure 'fini_timer()' may be called to close the file. The default timer implementation is thread safe if used with OpenMP multi-threaded code so long as the OpenMP thread team is given the copyin(/timer_private/) attribute for correct operation. The common block /timer_private/ should be included for OpenMP use by including the file 'timer_common.inc'. The module 'lib/timer_C_wrapper.f90' provides a Fortran wrapper along with 'init' and 'fini' subroutines which allow a C/C++ application to call timer instrumented Fortran code and for it to receive callbacks of 'timer()' subroutine invocations. No C/C++ timer implementation is provided at this stage. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6320 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2015-12-27 10:40:57 -05:00
use timer_module, only: timer
real s3(64,63)
character decoded*22
character*12 mycall_12,hiscall_12
character*6 mycall,hiscall,hisgrid
integer dat4(12)
integer mrsym(63),mr2sym(63),mrprob(63),mr2prob(63)
integer correct(63),tmp(63)
logical ltext
common/chansyms65/correct
save
if(mode65.eq.-99) stop !Silence compiler warning
mycall=mycall_12(1:6)
hiscall=hiscall_12(1:6)
qual=0.
nbirdie=20
npct=50
afac1=1.1
nft=0
nfail=0
decoded=' '
call pctile(s3,4032,npct,base)
s3=s3/base
s3a=s3 !###
! Get most reliable and second-most-reliable symbol values, and their
! probabilities
1 call demod64a(s3,nadd,afac1,mrsym,mrprob,mr2sym,mr2prob,ntest,nlow)
call chkhist(mrsym,nhist,ipk) !Test for birdies and QRM
if(nhist.ge.nbirdie) then
nfail=nfail+1
call pctile(s3,4032,npct,base)
s3(ipk,1:63)=base
if(nfail.gt.30) then
decoded=' '
ncount=-1
go to 900
endif
go to 1
endif
mrs=mrsym
mrs2=mr2sym
call graycode65(mrsym,63,-1) !Remove gray code
call interleave63(mrsym,-1) !Remove interleaving
call interleave63(mrprob,-1)
call graycode65(mr2sym,63,-1) !Remove gray code and interleaving
call interleave63(mr2sym,-1) !from second-most-reliable symbols
call interleave63(mr2prob,-1)
ntry=0
call timer('ftrsd ',0)
param=0
call ftrsd2(mrsym,mrprob,mr2sym,mr2prob,ntrials,correct,param,ntry)
call timer('ftrsd ',1)
ncandidates=param(0)
nhard=param(1)
nsoft=param(2)
nerased=param(3)
rtt=0.001*param(4)
ntotal=param(5)
qual=0.001*param(7)
nd0=81
r0=0.87
if(naggressive.eq.10) then
nd0=83
r0=0.90
endif
if(ntotal.le.nd0 .and. rtt.le.r0) nft=1
if(nft.eq.0 .and. iand(ndepth,32).eq.32) then
qmin=2.0 - 0.1*naggressive
call timer('hint65 ',0)
call hint65(s3,mrs,mrs2,nadd,nflip,mycall,hiscall,hisgrid,qual,decoded)
if(qual.ge.qmin) then
nft=2
ncount=0
else
decoded=' '
ntry=0
endif
call timer('hint65 ',1)
go to 900
endif
ncount=-1
decoded=' '
ltext=.false.
if(nft.gt.0) then
! Turn the corrected symbol array into channel symbols for subtraction;
! pass it back to jt65a via common block "chansyms65".
do i=1,12
dat4(i)=correct(13-i)
enddo
do i=1,63
tmp(i)=correct(64-i)
enddo
correct(1:63)=tmp(1:63)
call interleave63(correct,63,1)
call graycode65(correct,63,1)
call unpackmsg(dat4,decoded,.false.,' ') !Unpack the user message
ncount=0
if(iand(dat4(10),8).ne.0) ltext=.true.
endif
900 continue
if(nft.eq.1 .and. nhard.lt.0) decoded=' '
return
end subroutine extract
subroutine getpp(workdat,p)
use jt65_mod
integer workdat(63)
integer a(63)
a(1:63)=workdat(63:1:-1)
call interleave63(a,1)
call graycode(a,63,1,a)
psum=0.
do j=1,63
i=a(j)+1
x=s3a(i,j)
s3a(i,j)=0.
psum=psum + x
s3a(i,j)=x
enddo
p=psum/63.0
return
end subroutine getpp