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.
3 years ago · cd96211ace
parent 607ecc27ed
commit cd96211ace
1 changed files with 2 additions and 2 deletions
--- a/libavfilter/f_ebur128.c
+++ b/libavfilter/f_ebur128.c
@ -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) {