| /* |
| * 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 "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); |
| |
| 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; |
| } |
| } |
| |
| /* Clean up */ |
| static void |
| gst_water_ripple_finalize (GObject * obj) |
| { |
| G_OBJECT_CLASS (parent_class)->finalize (obj); |
| } |
| |
| 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; |
| |
| parent_class = g_type_class_peek_parent (klass); |
| |
| gst_element_class_set_details_simple (gstelement_class, |
| "waterripple", |
| "Transform/Effect/Video", |
| "Creates a water ripple effect on the image", |
| "Thiago Santos<thiago.sousa.santos@collabora.co.uk>"); |
| |
| gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_water_ripple_finalize); |
| gobject_class->set_property = |
| GST_DEBUG_FUNCPTR (gst_water_ripple_set_property); |
| gobject_class->get_property = |
| GST_DEBUG_FUNCPTR (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; |
| } |
| |
| gboolean |
| gst_water_ripple_plugin_init (GstPlugin * plugin) |
| { |
| GST_DEBUG_CATEGORY_INIT (gst_water_ripple_debug, "waterripple", 0, |
| "waterripple"); |
| |
| return gst_element_register (plugin, "waterripple", GST_RANK_NONE, |
| GST_TYPE_WATER_RIPPLE); |
| } |