shorten decoder by (Jeff Muizelaar <jrmuizel gmail com>)

Originally committed as revision 3984 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 21 insertions, 0 deletions

diff --git a/libavcodec/golomb.h b/libavcodec/golomb.h
index 9f89502fa6..1204a52e20 100644
--- a/libavcodec/golomb.h
+++ b/libavcodec/golomb.h
@@ -284,6 +284,27 @@ static inline int get_sr_golomb_flac(GetBitContext *gb, int k, int limit, int es
     return (v>>1) ^ -(v&1);
 }
 
+/**
+ * read unsigned golomb rice code (shorten).
+ */
+static inline unsigned int get_ur_golomb_shorten(GetBitContext *gb, int k){
+	return get_ur_golomb_jpegls(gb, k, INT_MAX, 0);
+}
+
+/**
+ * read signed golomb rice code (shorten).
+ */
+static inline int get_sr_golomb_shorten(GetBitContext* gb, int k)
+{
+    int uvar = get_ur_golomb_jpegls(gb, k + 1, INT_MAX, 0);
+    if (uvar & 1)
+        return ~(uvar >> 1);
+    else
+        return uvar >> 1;
+}
+
+
+
 #ifdef TRACE
 
 static inline int get_ue(GetBitContext *s, char *file, const char *func, int line){