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Author SHA1 Message Date
Mark Borgerding 80eccb4e3c Trying to decide what to do about real odd FFTs 2004-01-29 03:26:48 +00:00
Mark Borgerding 49a6ad07e0 little easier to understand (hoepfully) 2004-01-24 22:13:14 +00:00
Mark Borgerding e335546c3e fast conv filtering cleaner ifc 2004-01-24 04:25:19 +00:00
Mark Borgerding 5005a2a99d mmap version 
with flush
 2004-01-24 03:32:21 +00:00
Mark Borgerding 58366b55ac add mmapped version 2004-01-24 02:45:44 +00:00
Mark Borgerding 25e377eaa8 fast conv filtering small edits 
2d files no longer needed with kiss_fftnd
 2004-01-24 01:34:01 +00:00
Mark Borgerding ca97282da6 does no copy fast conv filtering 2004-01-24 00:46:30 +00:00
Mark Borgerding 227c021f39 extra cleanup 2004-01-04 23:15:44 +00:00
Mark Borgerding c80f0cafb7 test code for avoiding buffer copies of output in fast conv filtering 2004-01-04 06:32:25 +00:00
Mark Borgerding 8ffc08b07b slightly closer, still overflows in some cases 2004-01-02 22:28:03 +00:00
Mark Borgerding e749a114cb real fast convolution filtering works mostly, sometimes it does not 
make all the samples ( obeserved with ./fastfir.py -n 1024 -r -l 100000 )
 2004-01-01 18:51:17 +00:00
Mark Borgerding 0243552944 fast convolution filtering works at least for complex numbers. 2003-12-31 22:49:14 +00:00
Mark Borgerding 212ec326e0 prototype code for fast convolution filtering 2003-12-31 04:06:24 +00:00
Mark Borgerding b468fd96d7 Added mucho comments. 2003-12-30 15:18:41 +00:00
Mark Borgerding ec3b64a62e added test code for kiss_fftnd 
FFTs can now have an arbitrary # of dimensions
Also, buffer copies are eliminated.
 2003-12-30 05:56:50 +00:00
Mark Borgerding 377ac796f0 streamlined 2003-12-30 03:08:56 +00:00
Mark Borgerding 22ff70b71d n-dimensional FFT works 2003-12-30 02:50:45 +00:00
Mark Borgerding 5e6199c868 no real change 2003-12-30 00:09:50 +00:00
Mark Borgerding 62ecf69446 added prototyping for N-dimensional FFT 2003-12-29 23:05:45 +00:00
Mark Borgerding 10a4a5c46b 2d fft now uses kiss_fft_stride to avoid buffer copies. 2003-12-29 21:07:19 +00:00
Mark Borgerding 4552a14801 added stride to fft input -- should simplify multi-dimensional FFTs 2003-12-29 18:50:13 +00:00
Mark Borgerding 604e238834 split kfc.c into source + header files. Added copyright. 2003-12-29 17:05:13 +00:00
Mark Borgerding 630089ded6 kfc works 2003-12-29 16:46:27 +00:00
Mark Borgerding cd94cd1ed0 testing kfc (kiss fft cache) 2003-12-29 16:38:03 +00:00
Mark Borgerding 0bd304429d file to cache fft cfg objects for ease of use. 2003-12-26 03:59:46 +00:00
Mark Borgerding f4961ed74b fixed a bug with nfft==1 
and added utility for more testing
 2003-12-16 03:43:05 +00:00
Mark Borgerding 95a7b856d1 compiles OK under MAC OS X 2003-12-15 03:53:14 +00:00
Mark Borgerding 6b23ebb5c1 getting ready for v100 2003-12-15 03:23:46 +00:00
Mark Borgerding 573536f48f fixed scaling for short real 
moved fft.py from ./ to sample_code
 2003-12-14 05:13:11 +00:00
Mark Borgerding 559c14b49b changed alloc functions to allow for initialization of user-supplied buffer 2003-12-14 03:02:30 +00:00
Mark Borgerding ab32979a47 *** empty log message *** 2003-12-11 01:56:18 +00:00
Mark Borgerding ef7f8ff6c0 getting ready to release version 1.0 2003-12-11 01:54:42 +00:00
Mark Borgerding 8a992d0e98 better, reduced mutliply in real fft 2003-12-10 05:48:42 +00:00
Mark Borgerding b880c599ef optimizing 2003-12-10 05:20:21 +00:00
Mark Borgerding b737756abb real fwd and rev fft works 2003-12-09 04:10:50 +00:00
Mark Borgerding 14e9b0dce4 about to start working on real inverse fft optimzation 2003-12-09 01:51:29 +00:00
Mark Borgerding 008d7fd4ea zero case optimized 2003-12-09 01:37:48 +00:00
Mark Borgerding 548032e305 real optimization 2003-12-09 01:25:47 +00:00
Mark Borgerding db56a8b1e2 little better, faster 2003-12-09 01:19:08 +00:00
Mark Borgerding 09dbf36e97 kiss_fftr.c gives correct answers for forward 2003-12-07 04:04:27 +00:00
Mark Borgerding c2eaab8606 *** empty log message *** 2003-12-05 03:51:33 +00:00
Mark Borgerding aaa04d9b60 script to make test vectors using Python and the FFT module 2003-12-05 03:40:53 +00:00
Mark Borgerding 72de907478 minor doc changes 2003-12-05 00:35:25 +00:00
Mark Borgerding 39d2974fe3 'make snr' now tests 2d ffts 2003-12-04 04:08:52 +00:00
Mark Borgerding f3c4a9e9ca internal checkpoint 
split kiss_fft.c into multiple files.  It seems the best approach, all things considered.
 2003-12-04 02:38:50 +00:00
Mark Borgerding 164ab47a25 *** empty log message *** 2003-11-14 04:20:19 +00:00
Mark Borgerding 63e7df14cf fft prototype code for real fft works 2003-11-14 02:11:57 +00:00
Mark Borgerding 968e277f93 working on real optimization 2003-11-14 01:37:31 +00:00
Mark Borgerding 673c7bafa4 real_fft works 2003-11-12 02:49:04 +00:00
Mark Borgerding 206e28f11c made the factorization a separate routine 2003-11-12 01:09:35 +00:00
Mark Borgerding 140f106743 benchmark utilities now give memory info 2003-11-08 02:48:02 +00:00
Mark Borgerding bd23fe8d23 the path I was taking would only work for prime numbers (Galois fields) 2003-11-08 01:42:15 +00:00
Mark Borgerding e98f9ff29a going to bed 2003-11-07 03:42:14 +00:00
Mark Borgerding ae305ca400 slightly faster 2003-11-07 03:31:59 +00:00
Mark Borgerding 3a5791f203 slightly faster 2003-11-07 03:23:19 +00:00
Mark Borgerding 1486d89291 faster 2003-11-07 03:04:52 +00:00
Mark Borgerding e9095a161c generic butterfly slightly slower -- hmmm 2003-11-07 02:39:49 +00:00
Mark Borgerding a296b09dbf wrong alloc size 2003-11-07 01:06:44 +00:00
Mark Borgerding cb5312efdc 2d fft seems to work 2003-11-06 03:59:31 +00:00
Mark Borgerding 4c458be5e9 checkpoint -- I don't think I've broken anything (yet) adding 2d fft. 2003-11-04 23:25:49 +00:00
Mark Borgerding ee3094a0e4 benchmark utilities 2003-11-04 02:11:00 +00:00
Mark Borgerding 4ebf0b5aca aded a CHANGELOG 2003-11-04 02:09:53 +00:00
Mark Borgerding 2788fba0bd added a CHANGELOG 2003-11-04 02:09:48 +00:00
Mark Borgerding 8b4e3bacca minor comments and added some primes 2003-11-04 02:00:01 +00:00
Mark Borgerding 6c8049cc75 slight changes to Makefile 2003-11-04 01:01:37 +00:00
Mark Borgerding 7b4de0aa11 a little faster 2003-11-03 04:30:50 +00:00
Mark Borgerding ad4ee571aa faster radix5 2003-11-03 04:04:01 +00:00
Mark Borgerding 0403fb3e4a radix 5 a little optimized 2003-11-03 03:48:34 +00:00
Mark Borgerding 3c0c0431e2 radix 5 works, but is 6x slower than fftw 2003-11-03 03:03:16 +00:00
Mark Borgerding 85764e6437 radix 5 doesn't work, but I thik it should. 
just a checkpoint commit
 2003-11-01 16:48:33 +00:00
Mark Borgerding 8ac63adc77 modified time benchmark to repeat same buffer over and over to avoid IO bottlenecks and get more consistent numbers. 2003-11-01 04:44:50 +00:00
Mark Borgerding 471803ca08 removed unused macro 2003-11-01 04:26:02 +00:00
Mark Borgerding 7b7aefe7c4 moved scratch buffer to stack variable 2003-11-01 03:59:43 +00:00
Mark Borgerding 28551899e2 radix 4 faster 2003-11-01 03:49:53 +00:00
Mark Borgerding d1df249536 radix3 fixed point now works 2003-10-31 04:01:09 +00:00
Mark Borgerding b1969544a6 radix 3 still doesn't work for fixed 2003-10-30 03:00:49 +00:00
Mark Borgerding d4f87befda re-added radix 3 butterfly 2003-10-30 02:02:29 +00:00
Mark Borgerding ca4c74e07c Woops, one should not test with input of all zeros 2003-10-29 04:29:01 +00:00
Mark Borgerding 97b18f3fef comments 2003-10-27 04:02:11 +00:00
Mark Borgerding d9fcda04b6 version 0.2 upload to sf 2003-10-26 19:29:36 +00:00
Mark Borgerding ecb1a76974 added zip creation to tarball make target 2003-10-26 04:25:18 +00:00
Mark Borgerding 1db3d91ee5 getting ready for next release 2003-10-26 04:07:32 +00:00
Mark Borgerding 52b4b9ab5c *** empty log message *** 2003-10-18 01:45:26 +00:00
Mark Borgerding c239ba2c1c slight code cleanup, comments 2003-10-18 01:39:36 +00:00
Mark Borgerding bca7fd5151 compiles with -ansi -pedantic 2003-10-18 01:23:34 +00:00
Mark Borgerding e2470b3a03 *** empty log message *** 2003-10-18 00:33:38 +00:00
Mark Borgerding a3d3217ae6 *** empty log message *** 2003-10-18 00:32:54 +00:00
Mark Borgerding 6f8bcedc24 radix 3 fixed point still broken 2003-10-17 02:59:32 +00:00
Mark Borgerding 31d4214f44 radix 3 seems to be pretty fast 
fixed point broken for some reason
 2003-10-17 02:34:22 +00:00
Mark Borgerding 73744b908c check point 
fixed does not currently work for radix 3
 2003-10-17 01:26:14 +00:00
Mark Borgerding 317f11e66e starting point for radix 3 
'make test' output
### testing SNR for  2187 point FFTs
#### DOUBLE
snr_t2f = 292.51
snr_f2t = 304.97
#### FLOAT
snr_t2f = 143.46
snr_f2t = 138.03
#### SHORT
snr_t2f = 49.257
snr_f2t = 16.294

#### timing 10000 x 2187 point FFTs
#### DOUBLE
Elapsed:0:05.05 user:3.60 sys:0.54
#### FLOAT
Elapsed:0:02.41 user:1.85 sys:0.23
#### SHORT
Elapsed:0:04.02 user:3.13 sys:0.08
 2003-10-17 00:11:19 +00:00
Mark Borgerding d6ae498630 took the bitwise and out of the switch case -- may have prevented optimization 2003-10-15 03:45:24 +00:00
Mark Borgerding 5f0efe8f17 pretty happy with radix 2 and radix 4 
next up is radix 3, or maybe 5
 2003-10-15 03:38:05 +00:00
Mark Borgerding 9504aa79c1 Fixed generic mixed radix butterfly 
'make test' output:
### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 296.95
snr_f2t = 317.25
#### FLOAT
snr_t2f = 147.96
snr_f2t = 145.14
#### SHORT
snr_t2f = 52.414
snr_f2t = 22.438

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:03.56 user:2.63 sys:0.19
#### FLOAT
Elapsed:0:01.35 user:1.07 sys:0.10
#### SHORT
Elapsed:0:01.70 user:1.37 sys:0.06
 2003-10-15 02:52:34 +00:00
Mark Borgerding 0424734e9d radix 4 now about as fast as original version 
'make test' output:
### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 296.78
snr_f2t = 317.11
#### FLOAT
snr_t2f = 145.28
snr_f2t = 143.51
#### SHORT
snr_t2f = 52.409
snr_f2t = 22.174

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:03.43 user:2.68 sys:0.25
#### FLOAT
Elapsed:0:01.39 user:1.08 sys:0.11
#### SHORT
Elapsed:0:02.01 user:1.39 sys:0.09
 2003-10-15 01:52:13 +00:00
Mark Borgerding f609401471 about to make some changes -- just wanted a checkpoint 2003-10-15 00:05:50 +00:00
Mark Borgerding 2ae7e0f1f2 radix 4 works but slow 2003-10-14 02:47:25 +00:00
Mark Borgerding 6b76490456 Fixed point works 
'make test' output:

### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 296.51
snr_f2t = 315.25
#### FLOAT
snr_t2f = 146.39
snr_f2t = 142.86
#### SHORT
snr_t2f = 58.077
snr_f2t = 27.897

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:01.53 user:1.06 sys:0.26
#### FLOAT
Elapsed:0:01.29 user:0.98 sys:0.12
#### SHORT
Elapsed:0:02.08 user:1.65 sys:0.03
 2003-10-14 01:09:33 +00:00
Mark Borgerding 8460f1f8f5 added optimization for radix 2 
### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 296.29
snr_f2t = 314.48
#### FLOAT
snr_t2f = 146.48
snr_f2t = 143.03
#### SHORT
snr_t2f = -30.269
snr_f2t = -60.442

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:02.77 user:2.22 sys:0.13
#### FLOAT
Elapsed:0:01.65 user:1.35 sys:0.07
#### SHORT
Elapsed:0:02.44 user:2.00 sys:0.06
 2003-10-14 00:38:58 +00:00
Mark Borgerding 0d6d61cfce reduced calling parameters 
negligible performane impact
 2003-10-11 23:07:16 +00:00