From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Tue, 22 Sep 2015 23:34:58 +0000 (+0200)
Subject: Microoptimization in ResampleEffect.
X-Git-Tag: 1.2.0~3
X-Git-Url: https://git.sesse.net/?p=movit;a=commitdiff_plain;h=645c0e312389d15c6661c152ce9635183e9ca307;ds=sidebyside

Microoptimization in ResampleEffect.
---

diff --git a/resample_effect.cpp b/resample_effect.cpp
index 1b74a96..156098e 100644
--- a/resample_effect.cpp
+++ b/resample_effect.cpp
@@ -142,8 +142,9 @@ void normalize_sum(Tap<T>* vals, unsigned num)
 		for (unsigned i = 0; i < num; ++i) {
 			sum += to_fp64(vals[i].weight);
 		}
+		double inv_sum = 1.0 / sum;
 		for (unsigned i = 0; i < num; ++i) {
-			vals[i].weight = from_fp64<T>(to_fp64(vals[i].weight) / sum);
+			vals[i].weight = from_fp64<T>(to_fp64(vals[i].weight) * inv_sum);
 		}
 	}
 }