ffmpeg roll of source to mar 9 version...

patched-ffmpeg-mt/libavutil/mathematics.h

Index: patched-ffmpeg-mt/libavutil/mathematics.h
===================================================================
--- patched-ffmpeg-mt/libavutil/mathematics.h	(revision 41250)
+++ patched-ffmpeg-mt/libavutil/mathematics.h	(working copy)
@@ -35,6 +35,9 @@
 #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
@@ -80,4 +83,13 @@
  */
 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 */