From e9655b3dcd667c3da2f5eae2c1bd971d5c271400 Mon Sep 17 00:00:00 2001
From: Vitor Sessak <vitor1001@gmail.com>
Date: Mon, 26 May 2008 18:21:09 +0000
Subject: [PATCH] Update comment

Originally committed as revision 13434 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/ra144.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c
index 5320d48807..5ecb04f34d 100644
--- a/libavcodec/ra144.c
+++ b/libavcodec/ra144.c
@@ -56,7 +56,10 @@ static int ra144_decode_init(AVCodecContext * avctx)
     return 0;
 }
 
-/* lookup square roots in table */
+/**
+ * Evaluate sqrt(x << 24). x must fit in 20 bits. This value is evaluated in a
+ * odd way to make the output identical to the binary decoder.
+ */
 static int t_sqrt(unsigned int x)
 {
     int s = 0;