From 337b6d3b365a5be352841b0f2b57bd63afe6bff0 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 29 Nov 2015 19:15:43 +0100 Subject: avfilter/af_sidechaincompress: fix output gain for rms(default) detection Signed-off-by: Paul B Mahol --- libavfilter/af_sidechaincompress.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavfilter/af_sidechaincompress.c b/libavfilter/af_sidechaincompress.c index 1dce1c0fb0..3af49ad1c4 100644 --- a/libavfilter/af_sidechaincompress.c +++ b/libavfilter/af_sidechaincompress.c @@ -50,6 +50,7 @@ typedef struct SidechainCompressContext { double knee_start; double knee_stop; double lin_knee_start; + double adj_knee_start; double compressed_knee_stop; int link; int detection; @@ -87,6 +88,7 @@ static av_cold int init(AVFilterContext *ctx) s->thres = log(s->threshold); s->lin_knee_start = s->threshold / sqrt(s->knee); + s->adj_knee_start = s->lin_knee_start * s->lin_knee_start; s->knee_start = log(s->lin_knee_start); s->knee_stop = log(s->threshold * sqrt(s->knee)); s->compressed_knee_stop = (s->knee_stop - s->thres) / s->ratio + s->thres; @@ -166,7 +168,7 @@ static void compressor(SidechainCompressContext *s, s->lin_slope += (abs_sample - s->lin_slope) * (abs_sample > s->lin_slope ? s->attack_coeff : s->release_coeff); - if (s->lin_slope > 0.0 && s->lin_slope > s->lin_knee_start) + if (s->lin_slope > 0.0 && s->lin_slope > (s->detection ? s->adj_knee_start : s->lin_knee_start)) gain = output_gain(s->lin_slope, s->ratio, s->thres, s->knee, s->knee_start, s->knee_stop, s->compressed_knee_stop, s->detection); -- cgit v1.2.3