[FFmpeg-cvslog] iirfilter: fix biquad filter coefficients.

[Justin Ruggles]

ffmpeg | branch: master | Justin Ruggles <justin.ruggles at gmail.com> | Mon Jun  6 17:10:11 2011 -0400| [2f37321abcbf9be5f58647b17155c0e257949c0d] | committer: Justin Ruggles

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.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2f37321abcbf9be5f58647b17155c0e257949c0d
---

 libavcodec/iirfilter.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/libavcodec/iirfilter.c b/libavcodec/iirfilter.c
index 98366e2..a942068 100644
--- a/libavcodec/iirfilter.c
+++ b/libavcodec/iirfilter.c
@@ -151,8 +151,6 @@ static int biquad_init_coeffs(void *avc, struct FFIIRFilterCoeffs *c,
     // during filtering, the delay state will include the gain multiplication
     c->cx[0] = lrintf(x0 / c->gain);
     c->cx[1] = lrintf(x1 / c->gain);
-    c->cy[0] /= c->gain;
-    c->cy[1] /= c->gain;
 
     return 0;
 }