--- /dev/null
+/*
+ * 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 "geometricmath.h"
+
+#include "gstcircle.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_circle_debug);
+#define GST_CAT_DEFAULT gst_circle_debug
+
+enum
+{
+ PROP_0,
+ PROP_ANGLE,
+ PROP_HEIGHT,
+ PROP_SPREAD_ANGLE
+};
+
+#define DEFAULT_ANGLE 0
+#define DEFAULT_HEIGHT 20
+#define DEFAULT_SPREAD_ANGLE G_PI
+
+GST_BOILERPLATE (GstCircle, gst_circle, GstCircleGeometricTransform,
+ GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM);
+
+static void
+gst_circle_set_property (GObject * object, guint prop_id, const GValue * value,
+ GParamSpec * pspec)
+{
+ GstCircle *circle;
+
+ circle = GST_CIRCLE_CAST (object);
+
+ switch (prop_id) {
+ case PROP_ANGLE:
+ circle->angle = g_value_get_double (value);
+ break;
+ case PROP_SPREAD_ANGLE:
+ circle->spread_angle = g_value_get_double (value);
+ break;
+ case PROP_HEIGHT:
+ circle->height = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_circle_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstCircle *circle;
+
+ circle = GST_CIRCLE_CAST (object);
+
+ switch (prop_id) {
+ case PROP_ANGLE:
+ g_value_set_double (value, circle->angle);
+ break;
+ case PROP_SPREAD_ANGLE:
+ g_value_set_double (value, circle->spread_angle);
+ break;
+ case PROP_HEIGHT:
+ g_value_set_int (value, circle->height);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/* Clean up */
+static void
+gst_circle_finalize (GObject * obj)
+{
+ G_OBJECT_CLASS (parent_class)->finalize (obj);
+}
+
+/* GObject vmethod implementations */
+
+static void
+gst_circle_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ gst_element_class_set_details_simple (element_class,
+ "circle",
+ "Transform/Effect/Video",
+ "Applies 'circle' geometric transform to the image",
+ "Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
+}
+
+static gboolean
+circle_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
+ gdouble * in_y)
+{
+ GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt);
+ GstCircle *circle = GST_CIRCLE_CAST (gt);
+ gdouble distance;
+ gdouble dx, dy;
+ gdouble theta;
+
+ dx = x - cgt->precalc_x_center;
+ dy = y - cgt->precalc_y_center;
+ distance = sqrt (dx * dx + dy * dy);
+ theta = atan2 (-dy, -dx) + circle->angle;
+
+ theta = mod_float (theta, 2 * G_PI);
+
+ *in_x = gt->width * theta / (circle->spread_angle + 0.0001);
+ *in_y =
+ gt->height * (1 - (distance - cgt->radius) / (circle->height + 0.0001));
+
+ *in_x = CLAMP (*in_x, 0, gt->width - 1);
+ *in_y = CLAMP (*in_y, 0, gt->height - 1);
+ GST_DEBUG_OBJECT (circle, "Inversely mapped %d %d into %lf %lf",
+ x, y, *in_x, *in_y);
+
+ return TRUE;
+}
+
+static void
+gst_circle_class_init (GstCircleClass * 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_finalize);
+ gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_circle_set_property);
+ gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_circle_get_property);
+
+ g_object_class_install_property (gobject_class, PROP_ANGLE,
+ g_param_spec_double ("angle", "angle",
+ "angle",
+ -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_ANGLE,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_SPREAD_ANGLE,
+ g_param_spec_double ("spread-angle", "spread angle",
+ "spread angle",
+ -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_SPREAD_ANGLE,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+ g_object_class_install_property (gobject_class, PROP_HEIGHT,
+ g_param_spec_int ("height", "height",
+ "height",
+ 0, G_MAXINT, DEFAULT_HEIGHT,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ gstgt_class->map_func = circle_map;
+}
+
+static void
+gst_circle_init (GstCircle * filter, GstCircleClass * gclass)
+{
+ filter->angle = DEFAULT_ANGLE;
+ filter->spread_angle = DEFAULT_SPREAD_ANGLE;
+ filter->height = DEFAULT_HEIGHT;
+}
+
+gboolean
+gst_circle_plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_circle_debug, "circle", 0, "circle");
+
+ return gst_element_register (plugin, "circle", GST_RANK_NONE,
+ GST_TYPE_CIRCLE);
+}
--- /dev/null
+/*
+ * 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.
+ */
+
+#ifndef __GST_CIRCLE_H__
+#define __GST_CIRCLE_H__
+
+#include <gst/gst.h>
+#include "gstcirclegeometrictransform.h"
+
+G_BEGIN_DECLS
+
+/* #defines don't like whitespacey bits */
+#define GST_TYPE_CIRCLE \
+ (gst_circle_get_type())
+#define GST_CIRCLE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CIRCLE,GstCircle))
+#define GST_CIRCLE_CAST(obj) \
+ ((GstCircle *)(obj))
+#define GST_CIRCLE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CIRCLE,GstCircleClass))
+#define GST_IS_CIRCLE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CIRCLE))
+#define GST_IS_CIRCLE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CIRCLE))
+
+typedef struct _GstCircle GstCircle;
+typedef struct _GstCircleClass GstCircleClass;
+
+struct _GstCircle
+{
+ GstCircleGeometricTransform element;
+
+ gdouble angle;
+ gdouble spread_angle;
+ gint height;
+};
+
+struct _GstCircleClass
+{
+ GstCircleGeometricTransformClass parent_class;
+};
+
+GType gst_circle_get_type (void);
+
+gboolean gst_circle_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_CIRCLE_H__ */
projects / platform / upstream / gstreamer.git / commitdiff