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0067d17205
Original commit message from CVS: * removal of //-style comments * don't link plugins to core libs -- the versioning is done internally to the plugins with the plugin_info struct, and symbol resolution is lazy, so we can always know if a plugin can be loaded by the plugin_info data. in theory.
292 lines
8.7 KiB
C
292 lines
8.7 KiB
C
/* GStreamer
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* Copyright (C) 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
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*
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* gstdparam_smooth.c: Realtime smoothed dynamic parameter
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <math.h>
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#include <string.h>
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#include <gst/gstinfo.h>
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#include <gst/control/dparam_smooth.h>
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#include <gst/control/dparammanager.h>
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static void gst_dpsmooth_class_init (GstDParamSmoothClass *klass);
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static void gst_dpsmooth_init (GstDParamSmooth *dparam);
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static void gst_dpsmooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
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static void gst_dpsmooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
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static gint64 gst_dpsmooth_time_since_last_update(GstDParam *dparam, gint64 timestamp);
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static void gst_dpsmooth_do_update_float (GstDParam *dparam, gint64 timestamp, GValue *value);
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enum {
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ARG_0,
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ARG_UPDATE_PERIOD,
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ARG_SLOPE_TIME,
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ARG_SLOPE_DELTA_FLOAT,
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ARG_SLOPE_DELTA_INT,
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ARG_SLOPE_DELTA_INT64,
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};
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GType
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gst_dpsmooth_get_type(void) {
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static GType dpsmooth_type = 0;
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if (!dpsmooth_type) {
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static const GTypeInfo dpsmooth_info = {
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sizeof(GstDParamSmoothClass),
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NULL,
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NULL,
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(GClassInitFunc)gst_dpsmooth_class_init,
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NULL,
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NULL,
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sizeof(GstDParamSmooth),
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0,
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(GInstanceInitFunc)gst_dpsmooth_init,
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};
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dpsmooth_type = g_type_register_static(GST_TYPE_DPARAM, "GstDParamSmooth", &dpsmooth_info, 0);
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}
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return dpsmooth_type;
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}
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static void
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gst_dpsmooth_class_init (GstDParamSmoothClass *klass)
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{
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GObjectClass *gobject_class;
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GstDParamSmoothClass *dpsmooth_class;
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GstObjectClass *gstobject_class;
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gobject_class = (GObjectClass*)klass;
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dpsmooth_class = (GstDParamSmoothClass*)klass;
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gstobject_class = (GstObjectClass*) klass;
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gobject_class->get_property = gst_dpsmooth_get_property;
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gobject_class->set_property = gst_dpsmooth_set_property;
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_UPDATE_PERIOD,
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g_param_spec_int64("update_period",
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"Update Period (nanoseconds)",
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"Number of nanoseconds between updates",
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0LL, G_MAXINT64, 2000000LL, G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SLOPE_TIME,
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g_param_spec_int64("slope_time",
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"Slope Time (nanoseconds)",
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"The time period to define slope_delta by",
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0LL, G_MAXINT64, 10000000LL, G_PARAM_READWRITE));
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SLOPE_DELTA_FLOAT,
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g_param_spec_float("slope_delta_float",
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"Slope Delta float",
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"The amount a float value can change for a given slope_time",
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0.0F, G_MAXFLOAT, 0.2F, G_PARAM_READWRITE));
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/*gstobject_class->save_thyself = gst_dparam_save_thyself; */
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}
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static void
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gst_dpsmooth_init (GstDParamSmooth *dpsmooth)
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{
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g_return_if_fail (dpsmooth != NULL);
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}
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/**
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* gst_dpsmooth_new:
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* @type: the type that this dparam will store
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*
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* Returns: a new instance of GstDParam
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*/
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GstDParam*
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gst_dpsmooth_new (GType type)
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{
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GstDParam *dparam;
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GstDParamSmooth *dpsmooth;
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dpsmooth =g_object_new (gst_dpsmooth_get_type (), NULL);
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dparam = GST_DPARAM(dpsmooth);
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GST_DPARAM_TYPE(dparam) = type;
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switch (type){
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case G_TYPE_FLOAT: {
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dparam->do_update_func = gst_dpsmooth_do_update_float;
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break;
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}
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default:
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/* we don't support this type here */
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dparam->do_update_func = gst_dparam_do_update_default;
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break;
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}
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dpsmooth->last_update_timestamp = 0LL;
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return dparam;
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}
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static void
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gst_dpsmooth_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstDParam *dparam;
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GstDParamSmooth *dpsmooth;
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g_return_if_fail(GST_IS_DPSMOOTH(object));
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dpsmooth = GST_DPSMOOTH(object);
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dparam = GST_DPARAM(object);
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GST_DPARAM_LOCK(dparam);
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switch (prop_id) {
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case ARG_UPDATE_PERIOD:
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dpsmooth->update_period = g_value_get_int64 (value);
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GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
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break;
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case ARG_SLOPE_TIME:
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dpsmooth->slope_time = g_value_get_int64 (value);
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GST_DEBUG(GST_CAT_PARAMS, "dpsmooth->slope_time:%lld\n",dpsmooth->slope_time);
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GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
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break;
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case ARG_SLOPE_DELTA_FLOAT:
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dpsmooth->slope_delta_float = g_value_get_float (value);
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GST_DPARAM_READY_FOR_UPDATE(dparam) = TRUE;
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break;
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default:
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break;
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}
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GST_DPARAM_UNLOCK(dparam);
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}
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static void
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gst_dpsmooth_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstDParam *dparam;
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GstDParamSmooth *dpsmooth;
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g_return_if_fail(GST_IS_DPSMOOTH(object));
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dpsmooth = GST_DPSMOOTH(object);
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dparam = GST_DPARAM(object);
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switch (prop_id) {
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case ARG_UPDATE_PERIOD:
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g_value_set_int64(value, dpsmooth->update_period);
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break;
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case ARG_SLOPE_TIME:
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g_value_set_int64(value, dpsmooth->slope_time);
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break;
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case ARG_SLOPE_DELTA_FLOAT:
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g_value_set_float (value, dpsmooth->slope_delta_float);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gint64
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gst_dpsmooth_time_since_last_update(GstDParam *dparam, gint64 timestamp)
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{
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gint64 time_diff, last_update_diff, num_update_periods;
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GstDParamSmooth *dpsmooth = GST_DPSMOOTH(dparam);
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last_update_diff = timestamp - dpsmooth->last_update_timestamp;
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time_diff = MIN(dpsmooth->update_period, last_update_diff);
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GST_DEBUG(GST_CAT_PARAMS, "last_update_diff:%lld\n",last_update_diff);
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GST_DEBUG(GST_CAT_PARAMS, "time_diff:%lld\n",time_diff);
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dpsmooth->last_update_timestamp = GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam);
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if(GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) <= timestamp && dpsmooth->update_period > 0LL){
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GST_DEBUG(GST_CAT_PARAMS, "dpsmooth->update_period:%lld\n",dpsmooth->update_period);
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num_update_periods = last_update_diff / dpsmooth->update_period;
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GST_DEBUG(GST_CAT_PARAMS, "num_update_periods:%lld\n",num_update_periods);
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GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam) = dpsmooth->update_period * (num_update_periods + 1LL);
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}
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GST_DEBUG(GST_CAT_PARAMS, "last:%lld current:%lld next:%lld\n",
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dpsmooth->last_update_timestamp, timestamp, GST_DPARAM_NEXT_UPDATE_TIMESTAMP(dparam));
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return time_diff;
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}
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static void
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gst_dpsmooth_do_update_float (GstDParam *dparam, gint64 timestamp, GValue *value)
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{
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gint64 time_diff;
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gfloat time_ratio;
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gfloat current, target, max_change, final_val;
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gfloat current_diff = 0;
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GstDParamSmooth *dpsmooth = GST_DPSMOOTH(dparam);
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GST_DPARAM_LOCK(dparam);
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time_diff = gst_dpsmooth_time_since_last_update(dparam, timestamp);
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target = dparam->value_float;
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current = g_value_get_float(value);
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time_ratio = (gfloat)time_diff / (gfloat)dpsmooth->slope_time;
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max_change = time_ratio * dpsmooth->slope_delta_float;
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GST_DEBUG(GST_CAT_PARAMS, "target:%f current:%f max_change:%f \n",
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target, current, max_change);
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if (GST_DPARAM_IS_LOG(dparam)){
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if (current == 0.0F){
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/* this shouldn't happen, so forget about smoothing and just set the value */
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final_val = target;
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GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
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}
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else {
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gfloat current_log;
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current_log = log(current);
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current_diff = ABS(current_log - log(target));
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GST_DEBUG(GST_CAT_PARAMS, "current_log:%f\n",current_log);
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GST_DEBUG(GST_CAT_PARAMS, "current_diff:%f\n",current_diff);
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if (current_diff > max_change)
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final_val = (target < current) ? exp(current_log-max_change) : exp(current_log+max_change);
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else
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final_val = target;
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GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
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}
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}
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else {
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current_diff = ABS (current - target);
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if (current_diff > max_change)
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final_val = (target < current) ? current-max_change : current+max_change;
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else
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final_val = target;
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GST_DPARAM_READY_FOR_UPDATE(dparam) = FALSE;
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}
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GST_DPARAM_READY_FOR_UPDATE(dparam) = (current_diff > max_change);
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g_value_set_float(value, final_val);
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GST_DEBUG(GST_CAT_PARAMS, "target:%f current:%f final:%f actual:%f\n", target, current, final_val, g_value_get_float(value));
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GST_DPARAM_UNLOCK(dparam);
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}
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