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