avutil/mathematics/av_add_stable: check for the common case of inc=1

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

avutil/mathematics/av_add_stable: check for the common case of inc=1
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
4956d0e5 · Michael Niedermayer · 5b7519fb · 4956d0e5
Commit 4956d0e5 authored Jun 02, 2014 by Michael Niedermayer
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mathematics.c libavutil/mathematics.c +2 -1

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--- a/libavutil/mathematics.c
+++ b/libavutil/mathematics.c
@@ -188,7 +188,8 @@ simple_round:

 int64_t av_add_stable(AVRational ts_tb, int64_t ts, AVRational inc_tb, int64_t inc)
 {
-    inc_tb = av_mul_q(inc_tb, (AVRational) {inc, 1});
+    if (inc != 1)
+        inc_tb = av_mul_q(inc_tb, (AVRational) {inc, 1});

    if (av_cmp_q(inc_tb, ts_tb) < 0) {
        //increase step is too small for even 1 step to be representable