From 9c9912b995bed00ae2a4717b9d680e30f388117c Mon Sep 17 00:00:00 2001
From: Young Han Lee <cpumaker@gmail.com>
Date: Thu, 17 Feb 2011 16:45:54 +0900
Subject: [PATCH] mdct: remove unnecessary multiplication
3*n4 was already calculated in n3.
(cherry picked from commit 979395bbbb9381b522b44c3448c24aef9c819ffc)
---
libavcodec/mdct.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/mdct.c b/libavcodec/mdct.c
index 819f6181159..31e2216dd3c 100644
--- a/libavcodec/mdct.c
+++ b/libavcodec/mdct.c
@@ -202,7 +202,7 @@ void ff_mdct_calc_c(FFTContext *s, FFTSample *out, const FFTSample *input)
/* pre rotation */
for(i=0;i<n8;i++) {
- re = -input[2*i+3*n4] - input[n3-1-2*i];
+ re = -input[2*i+n3] - input[n3-1-2*i];
im = -input[n4+2*i] + input[n4-1-2*i];
j = revtab[i];
CMUL(x[j].re, x[j].im, re, im, -tcos[i], tsin[i]);
--
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