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avfilter/f_ebur128: multiply in integer first, before dividing in float 

Restores the order of operations from before 15a1104, which reduces
errors from floating point calculations, and fixes FATE on mingw64.
This commit is contained in:
Hendrik Leppkes 2022-04-05 22:37:22 +02:00
parent 607ecc27ed
commit cd96211ace
1 changed files with 2 additions and 2 deletions
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4
libavfilter/f_ebur128.c
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@ -768,7 +768,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
/* get lower loudness to consider */
n = 0;
nb_pow = LRA_LOWER_PRC * 0.01 * nb_powers + 0.5;
nb_pow = LRA_LOWER_PRC * nb_powers * 0.01 + 0.5;
for (i = gate_hist_pos; i < HIST_SIZE; i++) {
n += ebur128->i3000.histogram[i].count;
if (n >= nb_pow) {
@ -779,7 +779,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
/* get higher loudness to consider */
n = nb_powers;
nb_pow = LRA_HIGHER_PRC * 0.01 * nb_powers + 0.5;
nb_pow = LRA_HIGHER_PRC * nb_powers * 0.01 + 0.5;
for (i = HIST_SIZE - 1; i >= 0; i--) {
n -= FFMIN(n, ebur128->i3000.histogram[i].count);
if (n < nb_pow) {