gstreamer/libs/gst/control/dparam_smooth.c
Steve Baker fc7a6ad8c9 completely rewrite interpolation so that it is more stable, faster, easier to maintain and it now sounds damned smoooth
Original commit message from CVS:
completely rewrite interpolation so that it is more stable, faster, easier to maintain and it now sounds damned smoooth
2002-05-29 18:47:06 +00:00

301 lines
9 KiB
C

/* GStreamer
* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
*
* gstdparam_smooth.c: Realtime smoothed dynamic parameter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include <string.h>
#include <gst/gstinfo.h>
#include "dparam_smooth.h"
#include "dparammanager.h"
static void gst_dpsmooth_class_init (GstDParamSmoothClass *klass);
static void gst_dpsmooth_init (GstDParamSmooth *dparam);
static void gst_dpsmooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_dpsmooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_dpsmooth_do_update_float (GstDParam *dparam, gint64 timestamp, GValue *value, GstDParamUpdateInfo update_info);
static void gst_dpsmooth_value_changed_float (GstDParam *dparam);
enum {
ARG_0,
ARG_UPDATE_PERIOD,
ARG_SLOPE_TIME,
ARG_SLOPE_DELTA_FLOAT,
ARG_SLOPE_DELTA_INT,
ARG_SLOPE_DELTA_INT64,
};
GType
gst_dpsmooth_get_type(void) {
static GType dpsmooth_type = 0;
if (!dpsmooth_type) {
static const GTypeInfo dpsmooth_info = {
sizeof(GstDParamSmoothClass),
NULL,
NULL,
(GClassInitFunc)gst_dpsmooth_class_init,
NULL,
NULL,
sizeof(GstDParamSmooth),
0,
(GInstanceInitFunc)gst_dpsmooth_init,
};
dpsmooth_type = g_type_register_static(GST_TYPE_DPARAM, "GstDParamSmooth", &dpsmooth_info, 0);
}
return dpsmooth_type;
}
static void
gst_dpsmooth_class_init (GstDParamSmoothClass *klass)
{
GObjectClass *gobject_class;
GstDParamSmoothClass *dpsmooth_class;
GstObjectClass *gstobject_class;
gobject_class = (GObjectClass*)klass;
dpsmooth_class = (GstDParamSmoothClass*)klass;
gstobject_class = (GstObjectClass*) klass;
gobject_class->get_property = gst_dpsmooth_get_property;
gobject_class->set_property = gst_dpsmooth_set_property;
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_UPDATE_PERIOD,
g_param_spec_int64("update_period",
"Update Period (nanoseconds)",
"Number of nanoseconds between updates",
0LL, G_MAXINT64, 2000000LL, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SLOPE_TIME,
g_param_spec_int64("slope_time",
"Slope Time (nanoseconds)",
"The time period to define slope_delta by",
0LL, G_MAXINT64, 10000000LL, G_PARAM_READWRITE));
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SLOPE_DELTA_FLOAT,
g_param_spec_float("slope_delta_float",
"Slope Delta float",
"The amount a float value can change for a given slope_time",
0.0F, G_MAXFLOAT, 0.2F, G_PARAM_READWRITE));
/*gstobject_class->save_thyself = gst_dparam_save_thyself; */
}
static void
gst_dpsmooth_init (GstDParamSmooth *dpsmooth)
{
g_return_if_fail (dpsmooth != NULL);
}
/**
* gst_dpsmooth_new:
* @type: the type that this dparam will store
*
* Returns: a new instance of GstDParam
*/
GstDParam*
gst_dpsmooth_new (GType type)
{
GstDParam *dparam;
GstDParamSmooth *dpsmooth;
dpsmooth =g_object_new (gst_dpsmooth_get_type (), NULL);
dparam = GST_DPARAM(dpsmooth);
GST_DPARAM_TYPE(dparam) = type;
switch (type){
case G_TYPE_FLOAT: {
dparam->do_update_func = gst_dpsmooth_do_update_float;
g_signal_connect (G_OBJECT (dpsmooth), "value_changed", G_CALLBACK (gst_dpsmooth_value_changed_float), NULL);
break;
}
default:
/* we don't support this type here */
dparam->do_update_func = gst_dparam_do_update_default;
break;
}
return dparam;
}
static void
gst_dpsmooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstDParam *dparam;
GstDParamSmooth *dpsmooth;
g_return_if_fail(GST_IS_DPSMOOTH(object));
dpsmooth = GST_DPSMOOTH(object);
dparam = GST_DPARAM(object);
GST_DPARAM_LOCK(dparam);
switch (prop_id) {
case ARG_UPDATE_PERIOD:
dpsmooth->update_period = g_value_get_int64 (value);
GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
break;
case ARG_SLOPE_TIME:
dpsmooth->slope_time = g_value_get_int64 (value);
GST_DEBUG(GST_CAT_PARAMS, "dpsmooth->slope_time:%lld",dpsmooth->slope_time);
GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
break;
case ARG_SLOPE_DELTA_FLOAT:
dpsmooth->slope_delta_float = g_value_get_float (value);
GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
break;
default:
break;
}
GST_DPARAM_UNLOCK(dparam);
}
static void
gst_dpsmooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstDParam *dparam;
GstDParamSmooth *dpsmooth;
g_return_if_fail(GST_IS_DPSMOOTH(object));
dpsmooth = GST_DPSMOOTH(object);
dparam = GST_DPARAM(object);
switch (prop_id) {
case ARG_UPDATE_PERIOD:
g_value_set_int64(value, dpsmooth->update_period);
break;
case ARG_SLOPE_TIME:
g_value_set_int64(value, dpsmooth->slope_time);
break;
case ARG_SLOPE_DELTA_FLOAT:
g_value_set_float (value, dpsmooth->slope_delta_float);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dpsmooth_value_changed_float (GstDParam *dparam)
{
GstDParamSmooth *dpsmooth;
gfloat time_ratio;
g_return_if_fail(GST_IS_DPSMOOTH(dparam));
dpsmooth = GST_DPSMOOTH(dparam);
if (GST_DPARAM_IS_LOG(dparam)){
dparam->value_float = log(dparam->value_float);
}
dpsmooth->start_float = dpsmooth->current_float;
dpsmooth->diff_float = dparam->value_float - dpsmooth->start_float;
time_ratio = ABS(dpsmooth->diff_float) / dpsmooth->slope_delta_float;
dpsmooth->duration_interp = (gint64)(time_ratio * (gfloat)dpsmooth->slope_time);
dpsmooth->need_interp_times = TRUE;
GST_DEBUG(GST_CAT_PARAMS, "%f to %f ratio:%f duration:%lld\n",
dpsmooth->start_float, dparam->value_float, time_ratio, dpsmooth->duration_interp);
}
static void
gst_dpsmooth_do_update_float (GstDParam *dparam, gint64 timestamp, GValue *value, GstDParamUpdateInfo update_info)
{
gfloat time_ratio;
GstDParamSmooth *dpsmooth = GST_DPSMOOTH(dparam);
GST_DPARAM_LOCK(dparam);
if (dpsmooth->need_interp_times){
dpsmooth->start_interp = timestamp;
dpsmooth->end_interp = timestamp + dpsmooth->duration_interp;
dpsmooth->need_interp_times = FALSE;
}
if ((update_info == GST_DPARAM_UPDATE_FIRST) || (timestamp >= dpsmooth->end_interp)){
if (GST_DPARAM_IS_LOG(dparam)){
g_value_set_float(value, exp(dparam->value_float));
}
else {
g_value_set_float(value, dparam->value_float);
}
dpsmooth->current_float = dparam->value_float;
GST_DEBUG(GST_CAT_PARAMS, "interp finished at %lld", timestamp);
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) = timestamp;
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) = timestamp;
GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
GST_DPARAM_UNLOCK(dparam);
return;
}
if (timestamp <= dpsmooth->start_interp){
if (GST_DPARAM_IS_LOG(dparam)){
g_value_set_float(value, exp(dpsmooth->start_float));
}
else {
g_value_set_float(value, dpsmooth->start_float);
}
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) = timestamp;
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) = dpsmooth->start_interp + dpsmooth->update_period;
GST_DEBUG(GST_CAT_PARAMS, "interp started at %lld", timestamp);
GST_DPARAM_UNLOCK(dparam);
return;
}
time_ratio = (gfloat)(timestamp - dpsmooth->start_interp) / (gfloat)dpsmooth->duration_interp;
GST_DEBUG(GST_CAT_PARAMS, "start:%lld current:%lld end:%lld ratio%f", dpsmooth->start_interp, timestamp, dpsmooth->end_interp, time_ratio);
GST_DEBUG(GST_CAT_PARAMS, "pre start:%f current:%f target:%f", dpsmooth->start_float, dpsmooth->current_float, dparam->value_float);
dpsmooth->current_float = dpsmooth->start_float + (dpsmooth->diff_float * time_ratio);
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) = timestamp + dpsmooth->update_period;
if (GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) > dpsmooth->end_interp){
GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) = dpsmooth->end_interp;
}
GST_DPARAM_LAST_UPDATE_TIMESTAMP(dparam) = timestamp;
if (GST_DPARAM_IS_LOG(dparam)){
g_value_set_float(value, exp(dpsmooth->current_float));
}
else {
g_value_set_float(value, dpsmooth->current_float);
}
GST_DEBUG(GST_CAT_PARAMS, "post start:%f current:%f target:%f", dpsmooth->start_float, dpsmooth->current_float, dparam->value_float);
GST_DPARAM_UNLOCK(dparam);
}