From: James Zern <jzern@google.com>
Date: Fri, 10 Feb 2017 03:28:59 +0000 (-0800)
Subject: vpx_usec_timer_elapsed: use 64-bit math
X-Git-Tag: v1.7.0~736^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=943f9c0356204683e295288e0bd8558abc98ae03;p=libvpx

vpx_usec_timer_elapsed: use 64-bit math

this prevents a rollover when tv_sec is a long:
signed integer overflow: 2776 * 1000000 cannot be represented in type
'long'

Change-Id: I03dc4476ee122b02e2856dad28358a20cf16a9f8
---

diff --git a/vpx_ports/vpx_timer.h b/vpx_ports/vpx_timer.h
index c1f1b6027..2083b4ece 100644
--- a/vpx_ports/vpx_timer.h
+++ b/vpx_ports/vpx_timer.h
@@ -83,7 +83,7 @@ static INLINE int64_t vpx_usec_timer_elapsed(struct vpx_usec_timer *t) {
   struct timeval diff;
 
   timersub(&t->end, &t->begin, &diff);
-  return diff.tv_sec * 1000000 + diff.tv_usec;
+  return (int64_t)diff.tv_sec * 1000000 + diff.tv_usec;
 #endif
 }