#ifndef M_LN10
#define M_LN10 2.30258509299404568402 /* log_e 10 */
#endif
+#ifndef M_LOG2_10
+#define M_LOG2_10 3.32192809488736234787 /* log_2 10 */
+#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#endif
*/
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq) av_const;
+/**
+ * Compares 2 timestamps each in its own timebases.
+ * The result of the function is undefined if one of the timestamps
+ * is outside the int64_t range when represented in the others timebase.
+ * @returns -1 if ts_a is before ts_b, 1 if ts_a is after ts_b or 0 if they represent the same position
+ */
+int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b);
+
+
#endif /* AVUTIL_MATHEMATICS_H */