[FFmpeg-cvslog] swr: minor simplification for the noise shaping pos update

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Jan 12 17:25:19 2013 +0100| [b5d9e5d06cb6b4e207471a5ac594a10a2901c100] | committer: Michael Niedermayer

swr: minor simplification for the noise shaping pos update

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b5d9e5d06cb6b4e207471a5ac594a10a2901c100
---

 libswresample/dither_template.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libswresample/dither_template.c b/libswresample/dither_template.c
index 68b5ae4..992a2ac 100644
--- a/libswresample/dither_template.c
+++ b/libswresample/dither_template.c
@@ -38,7 +38,7 @@ void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData
             double d1, d = src[i]*S_1;
             for(j=0; j<taps; j++)
                 d -= s->dither.ns_coeffs[j] * s->dither.ns_errors[ch][pos + j];
-            pos = pos ? pos - 1 : pos - 1 + taps;
+            pos = pos ? pos - 1 : taps - 1;
             d1 = rint(d + noise[i]);
             s->dither.ns_errors[ch][pos + taps] = s->dither.ns_errors[ch][pos] = d1 - d;
             d1 *= S;