mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-11-19 00:01:23 +00:00
Code Issues 1 Projects Releases Wiki Activity

gst/equalizer/gstiirequalizer.c: Document parameter mapping.

Browse source 
Original commit message from CVS:
* gst/equalizer/gstiirequalizer.c:
Document parameter mapping.
This commit is contained in:
Stefan Kost 2007-06-20 10:15:00 +00:00
parent 3dbc3b7ad1
commit 7619871a05
2 changed files with 16 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
ChangeLog
View file

@ -1,3 +1,8 @@
2007-06-20 Stefan Kost <ensonic@users.sf.net>
* gst/equalizer/gstiirequalizer.c:
Document parameter mapping.
2007-06-20 Stefan Kost <ensonic@users.sf.net>
* gst/spectrum/gstspectrum.c: (gst_spectrum_event),

14
gst/equalizer/gstiirequalizer.c
View file

@ -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)