*** empty log message ***

This commit is contained in:
Mark Borgerding 2003-08-14 00:40:01 +00:00
parent 4add8dbbb6
commit 570f23d821

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@ -1,64 +0,0 @@
#!/usr/bin/octave -q
# Compare the results of kiss_fft with those calculated by octave's fft routines
nfft=1024
showdiff=0;
use_inverse_fft = 1
infile = 'fftin.dat'
outfile = 'fftout.dat'
for test_case =1:3
printf( '====================================\n');
if test_case == 1,
prec = 'short'
prog = './kiss_fft_s'
elseif test_case == 2,
prec = 'float'
prog = './kiss_fft_f'
else
prec = 'double'
prog = './kiss_fft_d'
endif
# create the input
input = rand(1,nfft) .* exp(2*pi*j*rand(1,nfft));
input = floor( real(input)*32767 ) + j*floor(imag(input)*32767 );
# write the input
f = fopen( infile, "w", "native");
to_write = [real(input);imag(input) ];
fwrite(f,to_write,prec);
fclose(f);
if use_inverse_fft,
cmd = sprintf('%s -s -i %d < %s > %s',prog,nfft,infile,outfile)
comp = ifft(input);
else
cmd = sprintf('%s -s %d < %s > %s',prog,nfft,infile,outfile)
comp = fft(input);
endif
system(cmd);
# read the output
f = fopen(outfile,"r", "native");
from_read = fread(f,Inf,prec)';
output = (from_read(1:2:nfft*2) + j*from_read(2:2:nfft*2));
diff = output - comp;
noise_pow = sum( conj(diff).*diff );
sig_pow = sum( conj(comp).*comp );
snr = 10*log10( sig_pow / noise_pow )
avg_scale = mean( abs(output) ./ abs(comp) )
var_scale = var( abs(output) ./ abs(comp) )
if showdiff,
x=linspace(0,2*pi,nfft);
figure(1);
plot( x, real(output), x, real(comp) );
figure(2);
plot( x, imag(output), x, imag(comp) );
figure(3);
plot( x, abs(output-comp) );
pause
endif
endfor