[FFmpeg-cvslog] r17738 - trunk/libavcodec/mathops.h

[mru]

Author: mru
Date: Tue Mar  3 01:03:55 2009
New Revision: 17738

Log:
Add sign_extend() function to mathops.h

Modified:
   trunk/libavcodec/mathops.h

Modified: trunk/libavcodec/mathops.h
==============================================================================
--- trunk/libavcodec/mathops.h	Mon Mar  2 21:32:24 2009	(r17737)
+++ trunk/libavcodec/mathops.h	Tue Mar  3 01:03:55 2009	(r17738)
@@ -113,5 +113,12 @@ static inline av_const int mid_pred(int 
 }
 #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 */