From 7619871a052c837d76c72ef54314d9c8fae82a9c Mon Sep 17 00:00:00 2001 From: Stefan Kost Date: Wed, 20 Jun 2007 10:15:00 +0000 Subject: gst/equalizer/gstiirequalizer.c: Document parameter mapping. Original commit message from CVS: * gst/equalizer/gstiirequalizer.c: Document parameter mapping. --- ChangeLog | 5 +++++ gst/equalizer/gstiirequalizer.c | 14 +++++++++++--- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/ChangeLog b/ChangeLog index 3c3a08f6..5dd6f8f3 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2007-06-20 Stefan Kost + + * gst/equalizer/gstiirequalizer.c: + Document parameter mapping. + 2007-06-20 Stefan Kost * gst/spectrum/gstspectrum.c: (gst_spectrum_event), diff --git a/gst/equalizer/gstiirequalizer.c b/gst/equalizer/gstiirequalizer.c index 926b1e0a..ff11c9e7 100644 --- a/gst/equalizer/gstiirequalizer.c +++ b/gst/equalizer/gstiirequalizer.c @@ -311,9 +311,17 @@ gst_iir_equalizer_finalize (GObject * object) G_OBJECT_CLASS (parent_class)->finalize (object); } -/* args are in the range [-1 ... 1] with 0 meaning "no action" - * convert to [-0.2 ... 1] with 0 meaning no action via the function - * f(x) = 0.25 * 5 ^ x - 0.25 +/* + * converts gain values to scale factors. + * + * arguments are in the range [-1 ... 1] with 0 meaning "no action" + * results are in the range [-0.2 ... 1] with 0 meaning "no action" + * via the function + * f(x) = 0.25 * 5 ^ x - 0.25 + * + * visualize via gnuplot: + * set xrange [-1:1] + * plot 0.25 * exp (log (5) * x) - 0.25 */ static gdouble arg_to_scale (gdouble arg) -- cgit v1.2.1