diff --git a/gst/geometrictransform/Makefile.am b/gst/geometrictransform/Makefile.am index 5c6d365f9a..db4976fc0a 100644 --- a/gst/geometrictransform/Makefile.am +++ b/gst/geometrictransform/Makefile.am @@ -13,7 +13,8 @@ libgstgeometrictransform_la_SOURCES = plugin.c \ gsttwirl.c \ gstwaterripple.c \ gststretch.c \ - gstbulge.c + gstbulge.c \ + gsttunnel.c libgstgeometrictransform_la_CFLAGS = $(GST_CFLAGS) $(GST_BASE_CFLAGS) \ $(GST_PLUGINS_BASE_CFLAGS) \ @@ -39,4 +40,5 @@ noinst_HEADERS = gstgeometrictransform.h \ gsttwirl.h \ gstwaterripple.h \ gststretch.h \ - gstbulge.h + gstbulge.h \ + gsttunnel.h diff --git a/gst/geometrictransform/gsttunnel.c b/gst/geometrictransform/gsttunnel.c new file mode 100644 index 0000000000..1246db4539 --- /dev/null +++ b/gst/geometrictransform/gsttunnel.c @@ -0,0 +1,149 @@ +/* + * GStreamer + * Copyright (C) 2010 Filippo Argiolas + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include + +#include "gsttunnel.h" +#include "geometricmath.h" + +GST_DEBUG_CATEGORY_STATIC (gst_tunnel_debug); +#define GST_CAT_DEFAULT gst_tunnel_debug + +GST_BOILERPLATE (GstTunnel, gst_tunnel, GstCircleGeometricTransform, + GST_TYPE_CIRCLE_GEOMETRIC_TRANSFORM); + +/* Clean up */ +static void +gst_tunnel_finalize (GObject * obj) +{ + G_OBJECT_CLASS (parent_class)->finalize (obj); +} + +/* GObject vmethod implementations */ + +static void +gst_tunnel_base_init (gpointer gclass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); + + gst_element_class_set_details_simple (element_class, + "tunnel", + "Transform/Effect/Video", + "Light tunnel effect", "Filippo Argiolas "); +} + +static gboolean +tunnel_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, + gdouble * in_y) +{ + GstCircleGeometricTransform *cgt = GST_CIRCLE_GEOMETRIC_TRANSFORM_CAST (gt); + GstTunnel *tunnel = GST_TUNNEL_CAST (gt); + + gdouble norm_x, norm_y; + gdouble width = gt->width; + gdouble height = gt->height; + gdouble r; + + + /* normalize in ((-1.0, -1.0), (1.0, 1.0) and traslate the center */ + /* plus a little trick to obtain a perfect circle, normalize in a + * square with sides equal to MAX(width, height) */ + norm_x = 2.0 * (x - cgt->x_center * width) / MAX (width, height); + norm_y = 2.0 * (y - cgt->y_center * height) / MAX (width, height); + + r = sqrt (norm_x * norm_x + norm_y * norm_y); + + /* do nothing if r < 0.5 */ + /* zoom otherwise */ + /* the second edge is the tunnel radius, see gststretch.c for + * comments about its customizability */ + norm_x *= CLAMP (r, 0.0, 0.5) / r; + norm_y *= CLAMP (r, 0.0, 0.5) / r; + + /* unnormalize */ + *in_x = 0.5 * (norm_x) * MAX (width, height) + cgt->x_center * width; + *in_y = 0.5 * (norm_y) * MAX (width, height) + cgt->y_center * height; + + GST_DEBUG_OBJECT (tunnel, "Inversely mapped %d %d into %lf %lf", + x, y, *in_x, *in_y); + + return TRUE; +} + +static void +gst_tunnel_class_init (GstTunnelClass * 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_tunnel_finalize); + + gstgt_class->map_func = tunnel_map; +} + +static void +gst_tunnel_init (GstTunnel * filter, GstTunnelClass * gclass) +{ + GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter); + + gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP; +} + +gboolean +gst_tunnel_plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (gst_tunnel_debug, "tunnel", 0, "tunnel"); + + return gst_element_register (plugin, "tunnel", GST_RANK_NONE, + GST_TYPE_TUNNEL); +} diff --git a/gst/geometrictransform/gsttunnel.h b/gst/geometrictransform/gsttunnel.h new file mode 100644 index 0000000000..c428f28ef9 --- /dev/null +++ b/gst/geometrictransform/gsttunnel.h @@ -0,0 +1,82 @@ +/* + * GStreamer + * Copyright (C) 2010 Filippo Argiolas + * + * 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_TUNNEL_H__ +#define __GST_TUNNEL_H__ + +#include +#include "gstcirclegeometrictransform.h" + +G_BEGIN_DECLS +/* #defines don't like whitespacey bits */ +#define GST_TYPE_TUNNEL \ + (gst_tunnel_get_type()) +#define GST_TUNNEL(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TUNNEL,GstTunnel)) +#define GST_TUNNEL_CAST(obj) \ + ((GstTunnel *)(obj)) +#define GST_TUNNEL_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TUNNEL,GstTunnelClass)) +#define GST_IS_TUNNEL(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TUNNEL)) +#define GST_IS_TUNNEL_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TUNNEL)) +typedef struct _GstTunnel GstTunnel; +typedef struct _GstTunnelClass GstTunnelClass; + +struct _GstTunnel +{ + GstCircleGeometricTransform element; +}; + +struct _GstTunnelClass +{ + GstCircleGeometricTransformClass parent_class; +}; + +GType gst_tunnel_get_type (void); + +gboolean gst_tunnel_plugin_init (GstPlugin * plugin); + +G_END_DECLS +#endif /* __GST_TUNNEL_H__ */ diff --git a/gst/geometrictransform/plugin.c b/gst/geometrictransform/plugin.c index cc9e11cbd6..f4ad306227 100644 --- a/gst/geometrictransform/plugin.c +++ b/gst/geometrictransform/plugin.c @@ -31,6 +31,7 @@ #include "gstwaterripple.h" #include "gststretch.h" #include "gstbulge.h" +#include "gsttunnel.h" static gboolean plugin_init (GstPlugin * plugin) @@ -65,6 +66,9 @@ plugin_init (GstPlugin * plugin) if (!gst_bulge_plugin_init (plugin)) return FALSE; + if (!gst_tunnel_plugin_init (plugin)) + return FALSE; + return TRUE; }