From 83b707613181c01fd4e9d25dda6787af439d2e41 Mon Sep 17 00:00:00 2001
From: Frank Barchard <fbarchard@google.com>
Date: Wed, 2 Jun 2010 16:09:19 +0000
Subject: Avoid division by zero that caused noise, typically at the beginning
 or end of a file.

Patch by Frank Barchard, fbarchard google

Originally committed as revision 23426 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/vorbis_enc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libavcodec')

diff --git a/libavcodec/vorbis_enc.c b/libavcodec/vorbis_enc.c
index 01d1b85cf0..b18f6531c6 100644
--- a/libavcodec/vorbis_enc.c
+++ b/libavcodec/vorbis_enc.c
@@ -681,7 +681,7 @@ static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
         float average = averages[i];
         int j;
 
-        average *= pow(tot_average / average, 0.5) * pow(1.25, position/200.); // MAGIC!
+        average = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // MAGIC!
         for (j = 0; j < range - 1; j++)
             if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average)
                 break;
-- 
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