mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2025-01-08 16:35:40 +00:00
Code Issues 1 Projects Releases Wiki Activity

smooth dparam now does log smooths when it is a log param (like frequency)

Browse source 
Original commit message from CVS:
smooth dparam now does log smooths when it is a log param (like frequency)
This commit is contained in:
Steve Baker 2001-09-17 19:14:35 +00:00
parent 59a47966f1
commit 312e46a540
1 changed files with 27 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

38
gst/gstdparam.c
View file

@ -19,6 +19,8 @@
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include "gst_private.h"
#include "gstdparam.h"
@ -316,22 +318,36 @@ gst_dparam_do_update_smooth (GstDParam *dparam, gint64 timestamp)
switch (G_VALUE_TYPE(GST_DPARAM_VALUE(dparam))){
case G_TYPE_FLOAT: {
gfloat target = g_value_get_float(dparam->point[0]);
gfloat current = g_value_get_float(GST_DPARAM_VALUE(dparam));
gfloat max_change = time_ratio * g_value_get_float(dparam->point[1]);
gfloat current, target, max_change, current_diff, final_val;
target = g_value_get_float(dparam->point[0]);
current = g_value_get_float(GST_DPARAM_VALUE(dparam));
max_change = time_ratio * g_value_get_float(dparam->point[1]);
GST_DEBUG(GST_CAT_PARAMS, "target:%f current:%f max_change:%f \n",
target, current, max_change);
if (ABS (current - target) < max_change){
GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
current = target;
}
target, current, max_change);
if (dparam->spec->is_log){
gfloat current_log;
current_log = log(current);
current_diff = ABS(current_log - log(target));
if (current_diff > max_change)
final_val = (target < current) ? exp(current_log-max_change) : exp(current_log+max_change);
else
final_val = target;
}
else {
current += (target < current) ? -max_change : max_change;
current_diff = ABS (current - target);
if (current_diff > max_change)
final_val = (target < current) ? current-max_change : current+max_change;
else
final_val = target;
}
g_value_set_float(GST_DPARAM_VALUE(dparam), current);
GST_DPARAM_READY_FOR_UPDATE(dparam) = (current_diff > max_change);
g_value_set_float(GST_DPARAM_VALUE(dparam), final_val);
break;
}
default:
break;