[FFmpeg-cvslog] avfilter/vf_noise: Use a separate seed for each plane

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Thu Oct 16 15:05:17 2014 +0200| [4f1a252fd3f04082c0d91ac2f42d47135197a8d5] | committer: Michael Niedermayer

avfilter/vf_noise: Use a separate seed for each plane

This should reduce the correlation between planes

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=4f1a252fd3f04082c0d91ac2f42d47135197a8d5
---

 libavfilter/vf_noise.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavfilter/vf_noise.c b/libavfilter/vf_noise.c
index a7ef35c..6218ed0 100644
--- a/libavfilter/vf_noise.c
+++ b/libavfilter/vf_noise.c
@@ -110,7 +110,7 @@ static av_cold int init_noise(NoiseContext *n, int comp)
     if (!noise)
         return AVERROR(ENOMEM);
 
-    av_lfg_init(&fp->lfg, fp->seed);
+    av_lfg_init(&fp->lfg, fp->seed + comp*31415U);
 
     for (i = 0, j = 0; i < MAX_NOISE; i++, j++) {
         if (flags & NOISE_UNIFORM) {