/* * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * Thanks to Jerry Huxtable work on its java * image editor and filters. The algorithms here were extracted from * his code. */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include "gstdiffuse.h" GST_DEBUG_CATEGORY_STATIC (gst_diffuse_debug); #define GST_CAT_DEFAULT gst_diffuse_debug enum { PROP_0, PROP_SCALE }; #define DEFAULT_SCALE 4 #define gst_diffuse_parent_class parent_class G_DEFINE_TYPE (GstDiffuse, gst_diffuse, GST_TYPE_GEOMETRIC_TRANSFORM); static void gst_diffuse_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDiffuse *diffuse; GstGeometricTransform *gt; gdouble v; gt = GST_GEOMETRIC_TRANSFORM_CAST (object); diffuse = GST_DIFFUSE_CAST (object); GST_OBJECT_LOCK (diffuse); switch (prop_id) { case PROP_SCALE: v = g_value_get_double (value); if (v != diffuse->scale) { diffuse->scale = v; gst_geometric_transform_set_need_remap (gt); } break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (diffuse); } static void gst_diffuse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDiffuse *diffuse; diffuse = GST_DIFFUSE_CAST (object); switch (prop_id) { case PROP_SCALE: g_value_set_double (value, diffuse->scale); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* Clean up */ static void gst_diffuse_finalize (GObject * obj) { GstDiffuse *diffuse = GST_DIFFUSE_CAST (obj); g_free (diffuse->sin_table); g_free (diffuse->cos_table); G_OBJECT_CLASS (parent_class)->finalize (obj); } /* GObject vmethod implementations */ static gboolean diffuse_prepare (GstGeometricTransform * trans) { GstDiffuse *diffuse = GST_DIFFUSE_CAST (trans); gint i; if (diffuse->sin_table) return TRUE; diffuse->sin_table = g_malloc0 (sizeof (gdouble) * 256); diffuse->cos_table = g_malloc0 (sizeof (gdouble) * 256); for (i = 0; i < 256; i++) { gdouble angle = (G_PI * 2 * i) / 256.0; diffuse->sin_table[i] = diffuse->scale * sin (angle); diffuse->cos_table[i] = diffuse->scale * cos (angle); } return TRUE; } static gboolean diffuse_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, gdouble * in_y) { GstDiffuse *diffuse = GST_DIFFUSE_CAST (gt); gint angle; gdouble distance; angle = g_random_int_range (0, 256); distance = g_random_double (); *in_x = x + distance * diffuse->sin_table[angle]; *in_y = y + distance * diffuse->cos_table[angle]; GST_DEBUG_OBJECT (diffuse, "Inversely mapped %d %d into %lf %lf", x, y, *in_x, *in_y); return TRUE; } static void gst_diffuse_class_init (GstDiffuseClass * 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_metadata (gstelement_class, "diffuse", "Transform/Effect/Video", "Diffuses the image by moving its pixels in random directions", "Thiago Santos"); gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_diffuse_finalize); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_diffuse_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_diffuse_get_property); g_object_class_install_property (gobject_class, PROP_SCALE, g_param_spec_double ("scale", "scale", "Scale of the texture", 1, G_MAXDOUBLE, DEFAULT_SCALE, GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstgt_class->prepare_func = diffuse_prepare; gstgt_class->map_func = diffuse_map; } static void gst_diffuse_init (GstDiffuse * filter) { GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter); gt->precalc_map = FALSE; gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP; filter->scale = DEFAULT_SCALE; } gboolean gst_diffuse_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_diffuse_debug, "diffuse", 0, "diffuse"); return gst_element_register (plugin, "diffuse", GST_RANK_NONE, GST_TYPE_DIFFUSE); }