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real fast convolution filtering works mostly, sometimes it does not

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make all the samples ( obeserved with ./fastfir.py -n 1024 -r -l 100000 )
This commit is contained in:
Mark Borgerding
2004-01-01 18:51:17 +00:00
parent 0243552944
commit e749a114cb
4 changed files with 113 additions and 65 deletions
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31
test/fastfir.py
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@ -44,21 +44,32 @@ def fastfilter(sig,h,nfft=None):
return concatenate( res )
def main():
siglen = 1e4
import sys
from getopt import getopt
opts,args = getopt(sys.argv[1:],'rn:l:')
opts=dict(opts)
siglen = int(opts.get('-l',1e4 ) )
hlen = 50
nfft = 128
nfft = int(opts.get('-n',128) )
usereal = opts.has_key('-r')
print 'nfft=%d'%nfft
# make a signal
sig = make_random( siglen )
# make an impulse response
h = make_random( hlen )
#h=[1]*2+[0]*3
if usereal:
sig=[c.real for c in sig]
h=[c.real for c in h]
# perform MAC filtering
yslow = slowfilter(sig,h)
#print '<YSLOW>',yslow,'</YSLOW>'
#yfast = fastfilter(sig,h,nfft)
yfast = utilfastfilter(sig,h,nfft)
yfast = utilfastfilter(sig,h,nfft,usereal)
#print yfast
print 'len(yslow)=%d'%len(yslow)
print 'len(yfast)=%d'%len(yfast)
@ -69,16 +80,20 @@ def main():
print yslow[:5]
print yfast[:5]
def utilfastfilter(sig,h,nfft):
def utilfastfilter(sig,h,nfft,usereal):
import compfft
import os
open( 'sig.dat','w').write( compfft.dopack(sig,'f',1) )
open( 'h.dat','w').write( compfft.dopack(h,'f',1) )
cmd = './ff_float -n %d -i sig.dat -h h.dat -o out.dat' % nfft
open( 'sig.dat','w').write( compfft.dopack(sig,'f',not usereal) )
open( 'h.dat','w').write( compfft.dopack(h,'f',not usereal) )
if usereal:
util = './ffr_float'
else:
util = './ff_float'
cmd = 'time %s -n %d -i sig.dat -h h.dat -o out.dat' % (util, nfft)
print cmd
ec = os.system(cmd)
print 'exited->',ec
return compfft.dounpack(open('out.dat').read(),'f',1)
return compfft.dounpack(open('out.dat').read(),'f',not usereal)
if __name__ == "__main__":
main()