/* * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-mirror * @title: mirror * @see_also: geometrictransform * * Mirror is a geometric transform element. It splits the image into two halves * and reflects one over each other. * * ## Example launch line * |[ * gst-launch-1.0 -v videotestsrc ! mirror ! videoconvert ! autovideosink * ]| * */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include "gstmirror.h" GST_DEBUG_CATEGORY_STATIC (gst_mirror_debug); #define GST_CAT_DEFAULT gst_mirror_debug enum { PROP_0, PROP_MODE }; #define DEFAULT_PROP_MODE GST_MIRROR_MODE_LEFT #define gst_mirror_parent_class parent_class G_DEFINE_TYPE (GstMirror, gst_mirror, GST_TYPE_GEOMETRIC_TRANSFORM); #define GST_TYPE_MIRROR_MODE (gst_mirror_mode_get_type()) static GType gst_mirror_mode_get_type (void) { static GType mode_type = 0; static const GEnumValue modes[] = { {GST_MIRROR_MODE_LEFT, "Split horizontally and reflect left into right", "left"}, {GST_MIRROR_MODE_RIGHT, "Split horizontally and reflect right into left", "right"}, {GST_MIRROR_MODE_TOP, "Split vertically and reflect top into bottom", "top"}, {GST_MIRROR_MODE_BOTTOM, "Split vertically and reflect bottom into top", "bottom"}, {0, NULL, NULL}, }; if (!mode_type) { mode_type = g_enum_register_static ("GstMirrorMode", modes); } return mode_type; } static void gst_mirror_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMirror *filter = GST_MIRROR_CAST (object); switch (prop_id) { case PROP_MODE: { gint mode; GST_OBJECT_LOCK (filter); mode = g_value_get_enum (value); if (mode != filter->mode) { GstGeometricTransform *gt; gt = GST_GEOMETRIC_TRANSFORM_CAST (object); filter->mode = mode; gst_geometric_transform_set_need_remap (gt); } GST_OBJECT_UNLOCK (filter); break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_mirror_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMirror *filter = GST_MIRROR_CAST (object); switch (prop_id) { case PROP_MODE: g_value_set_enum (value, filter->mode); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean mirror_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x, gdouble * in_y) { GstMirror *mirror = GST_MIRROR_CAST (gt); gdouble hw = gt->width / 2.0 - 1.0; gdouble hh = gt->height / 2.0 - 1.0; switch (mirror->mode) { case GST_MIRROR_MODE_LEFT: if (x > hw) *in_x = gt->width - 1.0 - x; else *in_x = x; *in_y = y; break; case GST_MIRROR_MODE_RIGHT: if (x > hw) *in_x = x; else *in_x = gt->width - 1.0 - x; *in_y = y; break; case GST_MIRROR_MODE_TOP: if (y > hh) *in_y = gt->height - 1.0 - y; else *in_y = y; *in_x = x; break; case GST_MIRROR_MODE_BOTTOM: if (y > hh) *in_y = y; else *in_y = gt->height - 1.0 - y; *in_x = x; break; default: g_assert_not_reached (); } GST_DEBUG_OBJECT (mirror, "Inversely mapped %d %d into %lf %lf", x, y, *in_x, *in_y); return TRUE; } static void gst_mirror_class_init (GstMirrorClass * 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, "mirror", "Transform/Effect/Video", "Split the image into two halves and reflect one over each other", "Filippo Argiolas "); gobject_class->set_property = gst_mirror_set_property; gobject_class->get_property = gst_mirror_get_property; g_object_class_install_property (gobject_class, PROP_MODE, g_param_spec_enum ("mode", "Mirror Mode", "How to split the video frame and which side reflect", GST_TYPE_MIRROR_MODE, DEFAULT_PROP_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gstgt_class->map_func = mirror_map; } static void gst_mirror_init (GstMirror * filter) { GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter); filter->mode = DEFAULT_PROP_MODE; gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP; } gboolean gst_mirror_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_mirror_debug, "mirror", 0, "mirror"); return gst_element_register (plugin, "mirror", GST_RANK_NONE, GST_TYPE_MIRROR); }