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23 Commits

Author SHA1 Message Date
Mans Rullgard
75a24bef4a iirfilter: add fate test 
Change the test program to output text instead of binary files so
it can be compared easily in FATE.

Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-07-04 16:26:26 +01:00
Justin Ruggles
2f37321abc iirfilter: fix biquad filter coefficients. 
The current filter implementation should only have the cx coefficients
divided by gain in order to give the correct output scale.
 2011-06-07 10:47:36 -04:00
Justin Ruggles
a26d2b4bc8 Fix compilation of iirfilter-test. 2011-05-17 18:06:51 -04:00
Mans Rullgard
2912e87a6c Replace FFmpeg with Libav in licence headers 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-03-19 13:33:20 +00:00
Justin Ruggles
37cb3eb534 Add special case for 2nd-order IIR filter. 
40% faster in ff_iir_filter_flt() when c->order == 2.
 2011-01-28 00:04:02 +00:00
Justin Ruggles
98cfadd648 10l: reverse the biquad coefficients. 
I did not notice that the filter implementation uses a reversed history state.

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
 2011-01-22 04:46:48 +01:00
Justin Ruggles
69915b48d6 iir: Change dst param to float* in ff_iir_filter_flt(). 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-21 22:23:43 +00:00
Justin Ruggles
0361d13cf3 iir: change filter type if/else to a switch. 
Simplifies error handling and makes it easier to add additional filter types.

Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 23:55:21 +00:00
Justin Ruggles
fcdf0a43cd Add biquad high-pass and low-pass IIR filters. 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 23:51:01 +00:00
Justin Ruggles
30112adadf Split out Butterworth filter coeff init to a separate function. 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 20:23:28 +00:00
Justin Ruggles
75b98610a7 cosmetics: vertical alignment and line wrap 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 18:35:42 +00:00
Justin Ruggles
d42dc217ed Add memory allocation failure checks to ff_iir_filter_init_coeffs(). 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 18:35:13 +00:00
Justin Ruggles
ebb230279a cosmetics: wrap long line 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 17:27:00 +00:00
Justin Ruggles
0a3d7697b4 Add function ff_iir_filter_flt() to accept floating-point input and output. 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-20 17:26:13 +00:00
Justin Ruggles
c3897d7690 Fix use of sstep/dstep in ff_iir_filter(). 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-01-19 20:56:07 +00:00
Diego Biurrun
ba87f0801d Remove explicit filename from Doxygen @file commands. 
Passing an explicit filename to this command is only necessary if the
documentation in the @file block refers to a file different from the
one the block resides in.

Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-04-20 14:45:34 +00:00
Alex Converse
ca0f1e5092 IIR filter test program. 
Originally committed as revision 19443 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-16 22:17:20 +00:00
Alex Converse
c8ec2f1cb8 Mark iir filter init and free functions av_cold. 
Originally committed as revision 19398 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-10 20:55:15 +00:00
Alex Converse
47f49f98ca Fix "iirfilter.c:55: warning: unused variable ‘size’" 
Originally committed as revision 19397 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-10 20:51:22 +00:00
Alex Converse
e187d87d7d Eliminate use of complex.h from iirfilter.c 
Originally committed as revision 19396 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-10 20:45:13 +00:00
Måns Rullgård
181b336304 Fix declarations of complex numbers 
Complex numbers must be declared using a base type of float, double,
or long double.

Originally committed as revision 19390 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-07-09 10:16:00 +00:00
Diego Biurrun
bad5537e2c Use full internal pathname in doxygen @file directives. 
Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.

Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-01 02:00:19 +00:00
Kostya Shishkov
a169f49881 Add generic IIR filter interface with Butterworth lowpass filter implementation 
and remove obsoleted old lowpass filter.

Originally committed as revision 15005 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-28 04:53:57 +00:00