mdct: remove unnecessary multiplication

3*n4 was already calculated in n3. (cherry picked from commit 979395bbbb)
14 years ago · 9c9912b995
parent 6159bd0d67
commit 9c9912b995
1 changed files with 1 additions and 1 deletions
--- 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]);