avfilter/af_dynaudnorm: do not clip audio

Clipping can happen when smoothed gain is higher than maximum allowed gain factor for current frame and peak value option is set to enough low value.
5 years ago · 6a1305e8b7
parent 3c8da7b982
commit 6a1305e8b7
1 changed files with 1 additions and 0 deletions
--- a/libavfilter/af_dynaudnorm.c
+++ b/libavfilter/af_dynaudnorm.c
@ -490,6 +490,7 @@ static void update_gain_history(DynamicAudioNormalizerContext *s, int channel,
        double smoothed;
        av_assert0(cqueue_size(s->gain_history_minimum[channel]) == s->filter_size);
        smoothed = gaussian_filter(s, s->gain_history_minimum[channel]);
+        smoothed = FFMIN(smoothed, cqueue_peek(s->gain_history_minimum[channel], s->filter_size / 2));

        cqueue_enqueue(s->gain_history_smoothed[channel], smoothed);