From ed3da72583298ed04a488e363bd3fa6d69ade165 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= Date: Fri, 1 May 2020 20:52:00 -0700 Subject: [PATCH] s->target_i and global are in dB but s->target_tp and true_peak are linear. Instead of mixing these in the calculations, convert the former first to have all following calculations in the same unit. Signed-off-by: Kyle Swanson --- libavfilter/af_loudnorm.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/libavfilter/af_loudnorm.c b/libavfilter/af_loudnorm.c index 314b25fa39..8e3cdc36db 100644 --- a/libavfilter/af_loudnorm.c +++ b/libavfilter/af_loudnorm.c @@ -453,10 +453,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in) true_peak = tmp; } - offset = s->target_i - global; - offset_tp = true_peak + offset; + offset = pow(10., (s->target_i - global) / 20.); + offset_tp = true_peak * offset; s->offset = offset_tp < s->target_tp ? offset : s->target_tp - true_peak; - s->offset = pow(10., s->offset / 20.); s->frame_type = LINEAR_MODE; }