---
libavcodec/ac3enc_float.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ac3enc_float.c b/libavcodec/ac3enc_float.c
index 2d7970d..d79d028 100644
--- a/libavcodec/ac3enc_float.c
+++ b/libavcodec/ac3enc_float.c
@@ -119,10 +119,12 @@ static void compute_rematrixing_strategy(AC3EncodeContext *s)
for (i = start; i < end; i++) {
float lt = block->mdct_coef[0][i];
float rt = block->mdct_coef[1][i];
+ float md = lt + rt;
+ float sd = lt - rt;
sum[0] += lt * lt;
sum[1] += rt * rt;
- sum[2] += (lt + rt) * (lt + rt);
- sum[3] += (lt - rt) * (lt - rt);
+ sum[2] += md * md;
+ sum[3] += sd * sd;
}
/* compare sums to determine if rematrixing will be used for this band */
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