ffmpeg roll of source to mar 9 version...

patched-ffmpeg-mt/libavutil/mathematics.c

Index: patched-ffmpeg-mt/libavutil/mathematics.c
===================================================================
--- patched-ffmpeg-mt/libavutil/mathematics.c	(revision 41250)
+++ patched-ffmpeg-mt/libavutil/mathematics.c	(working copy)
@@ -136,6 +136,14 @@
     return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
 }
 
+int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b){
+    int64_t a= tb_a.num * (int64_t)tb_b.den;
+    int64_t b= tb_b.num * (int64_t)tb_a.den;
+    if (av_rescale_rnd(ts_a, a, b, AV_ROUND_DOWN) < ts_b) return -1;
+    if (av_rescale_rnd(ts_b, b, a, AV_ROUND_DOWN) < ts_a) return  1;
+    return 0;
+}
+
 #ifdef TEST
 #include "integer.h"
 #undef printf