Commit Graph

19 Commits

Author SHA1 Message Date
Justin Ruggles
0ca4fcc94c Add special case for 2nd-order IIR filter.
40% faster in ff_iir_filter_flt() when c->order == 2.
(cherry picked from commit 37cb3eb534)
2011-01-28 03:15:35 +01:00
Justin Ruggles
ff5eded449 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>
(cherry picked from commit 98cfadd648)
2011-01-23 19:32:07 +01:00
Justin Ruggles
17d4f4558e iir: Change dst param to float* in ff_iir_filter_flt().
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 69915b48d6)
2011-01-23 19:32:07 +01:00
Justin Ruggles
a994f86196 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>
(cherry picked from commit 0361d13cf3)
2011-01-21 20:36:01 +01:00
Justin Ruggles
aa226b2460 Add biquad high-pass and low-pass IIR filters.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit fcdf0a43cd)
2011-01-21 20:36:01 +01:00
Justin Ruggles
2293b0b698 Split out Butterworth filter coeff init to a separate function.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 30112adadf)
2011-01-21 20:36:01 +01:00
Justin Ruggles
99c2111b12 cosmetics: vertical alignment and line wrap
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 75b98610a7)
2011-01-21 20:36:01 +01:00
Justin Ruggles
20d1f6fec1 Add memory allocation failure checks to ff_iir_filter_init_coeffs().
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit d42dc217ed)
2011-01-21 20:36:01 +01:00
Justin Ruggles
7891fdcc03 cosmetics: wrap long line
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit ebb230279a)
2011-01-21 20:36:00 +01:00
Justin Ruggles
b3b8b930fc Add function ff_iir_filter_flt() to accept floating-point input and output.
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 0a3d7697b4)
2011-01-21 20:36:00 +01:00
Justin Ruggles
f32e646d82 Fix use of sstep/dstep in ff_iir_filter().
Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit c3897d7690)
2011-01-21 20:35:45 +01:00
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