From: Måns Rullgård <mans@mansr.com>
Date: Tue, 3 Mar 2009 00:03:55 +0000 (+0000)
Subject: Add sign_extend() function to mathops.h
X-Git-Tag: v0.6~5579
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=101dfa7d0a15de14c599a9c5db9945419fd12fb9;p=platform%2Fupstream%2Flibav.git

Add sign_extend() function to mathops.h

Originally committed as revision 17738 to svn://svn.ffmpeg.org/ffmpeg/trunk
---

diff --git a/libavcodec/mathops.h b/libavcodec/mathops.h
index 880e94671..b92a6be13 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 */