[FFmpeg-cvslog] r17740 - trunk/libavcodec/bitstream.h

[jbr]

Author: jbr
Date: Tue Mar  3 03:00:47 2009
New Revision: 17740

Log:
Add a get_sbits_long() function.

Modified:
   trunk/libavcodec/bitstream.h

Modified: trunk/libavcodec/bitstream.h
==============================================================================
--- trunk/libavcodec/bitstream.h	Tue Mar  3 02:53:54 2009	(r17739)
+++ trunk/libavcodec/bitstream.h	Tue Mar  3 03:00:47 2009	(r17740)
@@ -33,6 +33,7 @@
 #include "libavutil/common.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/log.h"
+#include "mathops.h"
 
 #if defined(ALT_BITSTREAM_READER_LE) && !defined(ALT_BITSTREAM_READER)
 #   define ALT_BITSTREAM_READER
@@ -707,6 +708,13 @@ static inline unsigned int get_bits_long
 }
 
 /**
+ * reads 0-32 bits as a signed integer.
+ */
+static inline int get_sbits_long(GetBitContext *s, int n) {
+    return sign_extend(get_bits_long(s, n), n);
+}
+
+/**
  * shows 0-32 bits.
  */
 static inline unsigned int show_bits_long(GetBitContext *s, int n){