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mdct: remove unnecessary multiplication

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3*n4 was already calculated in n3.
(cherry picked from commit 979395bbbb9381b522b44c3448c24aef9c819ffc)
This commit is contained in:
Young Han Lee 2011-02-17 16:45:54 +09:00 committed by Michael Niedermayer
parent 6159bd0d67
commit 9c9912b995
1 changed files with 1 additions and 1 deletions
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libavcodec/mdct.c
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@ -202,7 +202,7 @@ void ff_mdct_calc_c(FFTContext *s, FFTSample *out, const FFTSample *input)
/* pre rotation */ /* pre rotation */
for(i=0;i<n8;i++) { 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]; im = -input[n4+2*i] + input[n4-1-2*i];
j = revtab[i]; j = revtab[i];
CMUL(x[j].re, x[j].im, re, im, -tcos[i], tsin[i]); CMUL(x[j].re, x[j].im, re, im, -tcos[i], tsin[i]);