/* * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, 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. */ /** * SECTION:element-waterripple * @title: waterripple * @see_also: geometrictransform * * The waterripple element creates a water ripple effect on the image. * * ## Example launch line * |[ * gst-launch-1.0 -v videotestsrc ! waterripple ! videoconvert ! autovideosink * ]| * */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <gst/gst.h> #include <math.h> #include "gstwaterripple.h" GST_DEBUG_CATEGORY_STATIC (gst_water_ripple_debug); #define GST_CAT_DEFAULT gst_water_ripple_debug enum { PROP_0, PROP_AMPLITUDE, PROP_PHASE, PROP_WAVELENGTH }; #define DEFAULT_AMPLITUDE 10.0 #define DEFAULT_PHASE 0.0 #define DEFAULT_WAVELENGTH 16.0 #define gst_water_ripple_parent_class parent_class G_DEFINE_TYPE (GstWaterRipple, gst_water_ripple, GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (waterripple, "waterripple", GST_RANK_NONE, GST_TYPE_WATER_RIPPLE, GST_DEBUG_CATEGORY_INIT (gst_water_ripple_debug, "waterripple", 0, "waterripple")); static void gst_water_ripple_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstWaterRipple *water_ripple; GstGeometricTransform *gt; gdouble v; gt = GST_GEOMETRIC_TRANSFORM_CAST (object); water_ripple = GST_WATER_RIPPLE_CAST (object); GST_OBJECT_LOCK (gt); switch (prop_id) { case PROP_AMPLITUDE: v = g_value_get_double (value); if (v != water_ripple->amplitude) { water_ripple->amplitude = v; gst_geometric_transform_set_need_remap (gt); } break; case PROP_PHASE: v = g_value_get_double (value); if (v != water_ripple->phase) { water_ripple->phase = v; gst_geometric_transform_set_need_remap (gt); } break; case PROP_WAVELENGTH: v = g_value_get_double (value); if (v != water_ripple->wavelength) { water_ripple->wavelength = v; gst_geometric_transform_set_need_remap (gt); } break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (gt); } static void gst_water_ripple_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstWaterRipple *water_ripple; water_ripple = GST_WATER_RIPPLE_CAST (object); switch (prop_id) { case PROP_AMPLITUDE: g_value_set_double (value, water_ripple->amplitude); break; case PROP_PHASE: g_value_set_double (value, water_ripple->phase); break; case PROP_WAVELENGTH: g_value_set_double (value, water_ripple->wavelength); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean water_ripple_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, gdouble * in_y) { GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt); GstWaterRipple *water = GST_WATER_RIPPLE_CAST (gt); gdouble distance; gdouble dx, dy; dx = x - cgt->precalc_x_center; dy = y - cgt->precalc_y_center; distance = dx * dx + dy * dy; if (distance > cgt->precalc_radius2) { *in_x = x; *in_y = y; } else { gdouble d = sqrt (distance); gdouble amount = water->amplitude * sin (d / water->wavelength * G_PI * 2 - water->phase); amount *= (cgt->precalc_radius - d) / cgt->precalc_radius; if (d != 0) amount *= water->wavelength / d; *in_x = x + dx * amount; *in_y = y + dy * amount; } GST_DEBUG_OBJECT (water, "Inversely mapped %d %d into %lf %lf", x, y, *in_x, *in_y); return TRUE; } static void gst_water_ripple_class_init (GstWaterRippleClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstGeometricTransformClass *gstgt_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstgt_class = (GstGeometricTransformClass *) klass; gst_element_class_set_static_metadata (gstelement_class, "waterripple", "Transform/Effect/Video", "Creates a water ripple effect on the image", "Thiago Santos<thiago.sousa.santos@collabora.co.uk>"); gobject_class->set_property = gst_water_ripple_set_property; gobject_class->get_property = gst_water_ripple_get_property; g_object_class_install_property (gobject_class, PROP_AMPLITUDE, g_param_spec_double ("amplitude", "amplitude", "amplitude", -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_AMPLITUDE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PHASE, g_param_spec_double ("phase", "phase", "phase", -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_PHASE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_WAVELENGTH, g_param_spec_double ("wavelength", "wavelength", "wavelength", -G_MAXDOUBLE, G_MAXDOUBLE, DEFAULT_WAVELENGTH, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstgt_class->map_func = water_ripple_map; } static void gst_water_ripple_init (GstWaterRipple * filter) { GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter); gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP; filter->amplitude = DEFAULT_AMPLITUDE; filter->phase = DEFAULT_PHASE; filter->wavelength = DEFAULT_WAVELENGTH; }