X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Finteger.h;h=d4d0201db4f9131c5d06cd3497fc9a14222e3b06;hb=382cb1154c0f7f5a55e715c154af876364e7205f;hp=6680e79ac33c8cd6ed850b25bf1a389fbcaf3fa6;hpb=37b2f1d07354e7871cf720aceaf8fdfae9d66573;p=ffmpeg

diff --git a/libavutil/integer.h b/libavutil/integer.h
index 6680e79ac33..d4d0201db4f 100644
--- a/libavutil/integer.h
+++ b/libavutil/integer.h
@@ -17,17 +17,19 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
  */
 
 /**
- * @file integer.h
+ * @file libavutil/integer.h
  * arbitrary precision integers
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
-#ifndef INTEGER_H
-#define INTEGER_H
+#ifndef AVUTIL_INTEGER_H
+#define AVUTIL_INTEGER_H
+
+#include <stdint.h>
+#include "common.h"
 
 #define AV_INTEGER_SIZE 8
 
@@ -35,43 +37,50 @@ typedef struct AVInteger{
     uint16_t v[AV_INTEGER_SIZE];
 } AVInteger;
 
-AVInteger av_add_i(AVInteger a, AVInteger b);
-AVInteger av_sub_i(AVInteger a, AVInteger b);
-int av_log2_i(AVInteger a);
-AVInteger av_mul_i(AVInteger a, AVInteger b);
+AVInteger av_add_i(AVInteger a, AVInteger b) av_const;
+AVInteger av_sub_i(AVInteger a, AVInteger b) av_const;
+
+/**
+ * Returns the rounded-down value of the base 2 logarithm of the given
+ * AVInteger. This is simply the index of the most significant bit
+ * which is 1, or 0 if all bits are 0.
+ */
+int av_log2_i(AVInteger a) av_const;
+AVInteger av_mul_i(AVInteger a, AVInteger b) av_const;
 
 /**
- * returns 0 if a==b, 1 if a>b and -1 if a<b.
+ * Returns 0 if a==b, 1 if a>b and -1 if a<b.
  */
-int av_cmp_i(AVInteger a, AVInteger b);
+int av_cmp_i(AVInteger a, AVInteger b) av_const;
 
 /**
- * bitwise shift.
- * @param s the number of bits by which the value should be shifted right, may be negative for shifting left
+ * bitwise shift
+ * @param s the number of bits by which the value should be shifted right,
+            may be negative for shifting left
  */
-AVInteger av_shr_i(AVInteger a, int s);
+AVInteger av_shr_i(AVInteger a, int s) av_const;
 
 /**
- * returns a % b.
- * @param quot a/b will be stored here
+ * Returns a % b.
+ * @param quot a/b will be stored here.
  */
 AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);
 
 /**
- * returns a/b.
+ * Returns a/b.
  */
-AVInteger av_div_i(AVInteger a, AVInteger b);
+AVInteger av_div_i(AVInteger a, AVInteger b) av_const;
 
 /**
- * converts the given int64_t to an AVInteger.
+ * Converts the given int64_t to an AVInteger.
  */
-AVInteger av_int2i(int64_t a);
+AVInteger av_int2i(int64_t a) av_const;
 
 /**
- * converts the given AVInteger to an int64_t.
- * if the AVInteger is too large to fit into an int64_t,
- * then only the least significant 64bit will be used
+ * Converts the given AVInteger to an int64_t.
+ * If the AVInteger is too large to fit into an int64_t,
+ * then only the least significant 64 bits will be used.
  */
-int64_t av_i2int(AVInteger a);
+int64_t av_i2int(AVInteger a) av_const;
 
-#endif // INTEGER_H
+#endif /* AVUTIL_INTEGER_H */