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236 lines
7.7 KiB
C
236 lines
7.7 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/*
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* Thanks to Jerry Huxtable <http://www.jhlabs.com> work on its java
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* image editor and filters. The algorithms here were extracted from
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* his code.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include <math.h>
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#include "gstcirclegeometrictransform.h"
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GST_DEBUG_CATEGORY_STATIC (gst_circle_geometric_transform_debug);
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#define GST_CAT_DEFAULT gst_circle_geometric_transform_debug
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GstGeometricTransformClass *parent_class;
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enum
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{
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PROP_0,
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PROP_X_CENTER,
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PROP_Y_CENTER,
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PROP_RADIUS
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};
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#define DEFAULT_X_CENTER 0.5
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#define DEFAULT_Y_CENTER 0.5
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#define DEFAULT_RADIUS 0.35
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static void
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gst_circle_geometric_transform_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstCircleGeometricTransform *cgt;
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GstGeometricTransform *gt;
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gdouble v;
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gt = GST_GEOMETRIC_TRANSFORM_CAST (object);
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cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (object);
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GST_OBJECT_LOCK (cgt);
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switch (prop_id) {
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case PROP_X_CENTER:
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v = g_value_get_double (value);
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if (v != cgt->x_center) {
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cgt->x_center = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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break;
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case PROP_Y_CENTER:
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v = g_value_get_double (value);
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if (v != cgt->y_center) {
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cgt->y_center = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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break;
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case PROP_RADIUS:
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v = g_value_get_double (value);
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if (v != cgt->radius) {
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cgt->radius = v;
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gst_geometric_transform_set_need_remap (gt);
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}
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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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GST_OBJECT_UNLOCK (cgt);
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}
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static void
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gst_circle_geometric_transform_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstCircleGeometricTransform *cgt;
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cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (object);
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switch (prop_id) {
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case PROP_X_CENTER:
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g_value_set_double (value, cgt->x_center);
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break;
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case PROP_Y_CENTER:
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g_value_set_double (value, cgt->y_center);
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break;
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case PROP_RADIUS:
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g_value_set_double (value, cgt->radius);
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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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/* GObject vmethod implementations */
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static gboolean
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circle_geometric_transform_precalc (GstGeometricTransform * gt)
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{
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GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt);
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cgt->precalc_x_center = cgt->x_center * gt->width;
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cgt->precalc_y_center = cgt->y_center * gt->height;
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cgt->precalc_radius =
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cgt->radius * 0.5 * sqrt (gt->width * gt->width +
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gt->height * gt->height);
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cgt->precalc_radius2 = cgt->precalc_radius * cgt->precalc_radius;
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return TRUE;
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}
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static void
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gst_circle_geometric_transform_class_init (GstCircleGeometricTransformClass *
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klass)
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{
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GObjectClass *gobject_class;
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GstGeometricTransformClass *gstgt_class;
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gobject_class = (GObjectClass *) klass;
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gstgt_class = (GstGeometricTransformClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_circle_geometric_transform_set_property;
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gobject_class->get_property = gst_circle_geometric_transform_get_property;
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/* FIXME I don't like the idea of x-center and y-center being in % and
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* radius and intensity in absolute values, I think no one likes it, but
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* I can't see a way to have nice default values without % */
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g_object_class_install_property (gobject_class, PROP_X_CENTER,
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g_param_spec_double ("x-center", "x center",
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"X axis center of the circle_geometric_transform effect",
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0.0, 1.0, DEFAULT_X_CENTER,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_Y_CENTER,
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g_param_spec_double ("y-center", "y center",
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"Y axis center of the circle_geometric_transform effect",
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0.0, 1.0, DEFAULT_Y_CENTER,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_RADIUS,
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g_param_spec_double ("radius", "radius",
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"radius of the circle_geometric_transform effect", 0.0, 1.0,
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DEFAULT_RADIUS,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstgt_class->prepare_func = circle_geometric_transform_precalc;
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gst_type_mark_as_plugin_api (GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM, 0);
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}
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static void
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gst_circle_geometric_transform_init (GstCircleGeometricTransform * filter,
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GstCircleGeometricTransformClass * gclass)
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{
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filter->x_center = DEFAULT_X_CENTER;
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filter->y_center = DEFAULT_Y_CENTER;
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filter->radius = DEFAULT_RADIUS;
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}
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GType
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gst_circle_geometric_transform_get_type (void)
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{
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static GType circle_geometric_transform_type = 0;
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if (!circle_geometric_transform_type) {
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static const GTypeInfo circle_geometric_transform_info = {
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sizeof (GstCircleGeometricTransformClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_circle_geometric_transform_class_init,
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NULL,
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NULL,
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sizeof (GstCircleGeometricTransform),
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0,
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(GInstanceInitFunc) gst_circle_geometric_transform_init,
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};
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circle_geometric_transform_type =
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g_type_register_static (GST_TYPE_GEOMETRIC_TRANSFORM,
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"GstCircleGeometricTransform", &circle_geometric_transform_info,
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G_TYPE_FLAG_ABSTRACT);
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GST_DEBUG_CATEGORY_INIT (gst_circle_geometric_transform_debug,
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"circlegeometrictransform", 0,
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"Base class for geometric transform elements that operate "
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"on a circular area");
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}
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return circle_geometric_transform_type;
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}
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