/* * GStreamer * Copyright (C) 2010 Thiago Santos * * 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 work on its java * image editor and filters. The algorithms here were extracted from * his code. */ /** * SECTION:element-marble * @title: marble * @see_also: geometrictransform * * Marble is a geometric image transform element. It applies a marbling effect * to the image. * * ## Example launch line * |[ * gst-launch-1.0 -v videotestsrc ! marble ! videoconvert ! autovideosink * ]| * */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include "gstmarble.h" GST_DEBUG_CATEGORY_STATIC (gst_marble_debug); #define GST_CAT_DEFAULT gst_marble_debug enum { PROP_0, PROP_XSCALE, PROP_YSCALE, PROP_AMOUNT, PROP_TURBULENCE }; #define DEFAULT_XSCALE 4 #define DEFAULT_YSCALE 4 #define DEFAULT_AMOUNT 1 #define DEFAULT_TURBULENCE 1 #define gst_marble_parent_class parent_class G_DEFINE_TYPE (GstMarble, gst_marble, GST_TYPE_GEOMETRIC_TRANSFORM); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (marble, "marble", GST_RANK_NONE, GST_TYPE_MARBLE, GST_DEBUG_CATEGORY_INIT (gst_marble_debug, "marble", 0, "marble")); static void gst_marble_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMarble *marble; GstGeometricTransform *gt; gdouble v; gt = GST_GEOMETRIC_TRANSFORM_CAST (object); marble = GST_MARBLE_CAST (object); GST_OBJECT_LOCK (gt); switch (prop_id) { case PROP_XSCALE: v = g_value_get_double (value); if (v != marble->xscale) { marble->xscale = v; gst_geometric_transform_set_need_remap (gt); } break; case PROP_YSCALE: v = g_value_get_double (value); if (v != marble->yscale) { marble->yscale = v; gst_geometric_transform_set_need_remap (gt); } break; case PROP_AMOUNT: v = g_value_get_double (value); if (v != marble->amount) { marble->amount = v; gst_geometric_transform_set_need_remap (gt); } break; case PROP_TURBULENCE: v = g_value_get_double (value); if (v != marble->turbulence) { marble->turbulence = 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_marble_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMarble *marble; marble = GST_MARBLE_CAST (object); switch (prop_id) { case PROP_XSCALE: g_value_set_double (value, marble->xscale); break; case PROP_YSCALE: g_value_set_double (value, marble->yscale); break; case PROP_AMOUNT: g_value_set_double (value, marble->amount); break; case PROP_TURBULENCE: g_value_set_double (value, marble->turbulence); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* Clean up */ static void gst_marble_finalize (GObject * obj) { GstMarble *marble = GST_MARBLE_CAST (obj); gst_gm_noise_free (marble->noise); g_free (marble->sin_table); g_free (marble->cos_table); G_OBJECT_CLASS (parent_class)->finalize (obj); } static gboolean marble_prepare (GstGeometricTransform * trans) { GstMarble *marble = GST_MARBLE_CAST (trans); gint i; if (!marble->noise) { marble->noise = gst_gm_noise_new (); } g_free (marble->sin_table); g_free (marble->cos_table); marble->sin_table = g_malloc0 (sizeof (gdouble) * 256); marble->cos_table = g_malloc0 (sizeof (gdouble) * 256); for (i = 0; i < 256; i++) { gdouble angle = (G_PI * 2 * i) / 256.0 * marble->turbulence; marble->sin_table[i] = -marble->yscale * sin (angle); marble->cos_table[i] = marble->yscale * cos (angle); } return TRUE; } static gboolean marble_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, gdouble * in_y) { GstMarble *marble = GST_MARBLE_CAST (gt); gint displacement; displacement = 127 * (1 + gst_gm_noise_2 (marble->noise, x / marble->xscale, y / marble->xscale)); displacement = CLAMP (displacement, 0, 255); *in_x = x + marble->sin_table[displacement]; *in_y = y + marble->cos_table[displacement]; GST_DEBUG_OBJECT (marble, "Inversely mapped %d %d into %lf %lf", x, y, *in_x, *in_y); return TRUE; } static void gst_marble_class_init (GstMarbleClass * 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, "marble", "Transform/Effect/Video", "Applies a marbling effect to the image", "Thiago Santos"); gobject_class->finalize = gst_marble_finalize; gobject_class->set_property = gst_marble_set_property; gobject_class->get_property = gst_marble_get_property; g_object_class_install_property (gobject_class, PROP_XSCALE, g_param_spec_double ("x-scale", "x-scale", "X scale of the texture", 0, G_MAXDOUBLE, DEFAULT_XSCALE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_YSCALE, g_param_spec_double ("y-scale", "y-scale", "Y scale of the texture", 0, G_MAXDOUBLE, DEFAULT_YSCALE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_AMOUNT, g_param_spec_double ("amount", "amount", "Amount of effect", 0.0, 1.0, DEFAULT_AMOUNT, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_YSCALE, g_param_spec_double ("turbulence", "turbulence", "Turbulence of the effect", 0.0, 1.0, DEFAULT_TURBULENCE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstgt_class->prepare_func = marble_prepare; gstgt_class->map_func = marble_map; } static void gst_marble_init (GstMarble * filter) { GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter); gt->precalc_map = TRUE; gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP; filter->xscale = DEFAULT_XSCALE; filter->yscale = DEFAULT_YSCALE; filter->amount = DEFAULT_AMOUNT; filter->turbulence = DEFAULT_TURBULENCE; }