* 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
- *
*/
/**
* @author Michael Niedermayer <michaelni@gmx.at>
*/
-#ifndef INTEGER_H
-#define INTEGER_H
+#ifndef FFMPEG_INTEGER_H
+#define FFMPEG_INTEGER_H
+
+#include <stdint.h>
#define AV_INTEGER_SIZE 8
AVInteger av_add_i(AVInteger a, AVInteger b);
AVInteger av_sub_i(AVInteger a, AVInteger b);
+
+/**
+ * returns the rounded down value of the logarithm of base 2 of the given AVInteger.
+ * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
+ */
int av_log2_i(AVInteger a);
AVInteger av_mul_i(AVInteger a, AVInteger b);
+
+/**
+ * returns 0 if a==b, 1 if a>b and -1 if a<b.
+ */
int av_cmp_i(AVInteger a, AVInteger b);
+
+/**
+ * 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);
/**
* returns a/b.
*/
AVInteger av_div_i(AVInteger a, AVInteger b);
+
+/**
+ * converts the given int64_t to an AVInteger.
+ */
AVInteger av_int2i(int64_t a);
+
+/**
+ * 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
+ */
int64_t av_i2int(AVInteger a);
-#endif // INTEGER_H
+#endif /* FFMPEG_INTEGER_H */