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

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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 */ /* get lower loudness to consider */
n = 0; 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++) { for (i = gate_hist_pos; i < HIST_SIZE; i++) {
n += ebur128->i3000.histogram[i].count; n += ebur128->i3000.histogram[i].count;
if (n >= nb_pow) { if (n >= nb_pow) {
@@ -779,7 +779,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
/* get higher loudness to consider */ /* get higher loudness to consider */
n = nb_powers; 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--) { for (i = HIST_SIZE - 1; i >= 0; i--) {
n -= FFMIN(n, ebur128->i3000.histogram[i].count); n -= FFMIN(n, ebur128->i3000.histogram[i].count);
if (n < nb_pow) { if (n < nb_pow) {