From 101dfa7d0a15de14c599a9c5db9945419fd12fb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Tue, 3 Mar 2009 00:03:55 +0000
Subject: [PATCH] Add sign_extend() function to mathops.h

Originally committed as revision 17738 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mathops.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h
index 880e94671f..b92a6be137 100644
--- a/libavcodec/mathops.h
+++ b/libavcodec/mathops.h
@@ -113,5 +113,12 @@ static inline av_const int mid_pred(int a, int b, int c)
 }
 #endif
 
+#ifndef sign_extend
+static inline av_const int sign_extend(int val, unsigned bits)
+{
+    return (val << (INT_BIT - bits)) >> (INT_BIT - bits);
+}
+#endif
+
 #endif /* AVCODEC_MATHOPS_H */