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221 lines
6.3 KiB
C
221 lines
6.3 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include <math.h>
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#include "gstmirror.h"
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GST_DEBUG_CATEGORY_STATIC (gst_mirror_debug);
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#define GST_CAT_DEFAULT gst_mirror_debug
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enum
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{
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PROP_0,
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PROP_MODE
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};
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#define DEFAULT_PROP_MODE GST_MIRROR_MODE_LEFT
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#define gst_mirror_parent_class parent_class
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G_DEFINE_TYPE (GstMirror, gst_mirror, GST_TYPE_GEOMETRIC_TRANSFORM);
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#define GST_TYPE_MIRROR_MODE (gst_mirror_mode_get_type())
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static GType
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gst_mirror_mode_get_type (void)
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{
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static GType mode_type = 0;
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static const GEnumValue modes[] = {
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{GST_MIRROR_MODE_LEFT, "Split horizontally and reflect left into right",
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"left"},
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{GST_MIRROR_MODE_RIGHT, "Split horizontally and reflect right into left",
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"right"},
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{GST_MIRROR_MODE_TOP, "Split vertically and reflect top into bottom",
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"top"},
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{GST_MIRROR_MODE_BOTTOM, "Split vertically and reflect bottom into top",
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"bottom"},
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{0, NULL, NULL},
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};
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if (!mode_type) {
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mode_type = g_enum_register_static ("GstMirrorMode", modes);
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}
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return mode_type;
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}
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static void
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gst_mirror_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstMirror *filter = GST_MIRROR_CAST (object);
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switch (prop_id) {
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case PROP_MODE:
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GST_OBJECT_LOCK (filter);
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filter->mode = g_value_get_enum (value);
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GST_OBJECT_UNLOCK (filter);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_mirror_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstMirror *filter = GST_MIRROR_CAST (object);
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switch (prop_id) {
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case PROP_MODE:
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g_value_set_enum (value, filter->mode);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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mirror_map (GstGeometricTransform * gt, gint x, gint y, gdouble * in_x,
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gdouble * in_y)
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{
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GstMirror *mirror = GST_MIRROR_CAST (gt);
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gdouble hw = gt->width / 2.0 - 1.0;
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gdouble hh = gt->height / 2.0 - 1.0;
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switch (mirror->mode) {
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case GST_MIRROR_MODE_LEFT:
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if (x > hw)
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*in_x = gt->width - 1.0 - x;
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else
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*in_x = x;
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*in_y = y;
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break;
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case GST_MIRROR_MODE_RIGHT:
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if (x > hw)
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*in_x = x;
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else
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*in_x = gt->width - 1.0 - x;
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*in_y = y;
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break;
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case GST_MIRROR_MODE_TOP:
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if (y > hh)
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*in_y = gt->height - 1.0 - y;
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else
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*in_y = y;
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*in_x = x;
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break;
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case GST_MIRROR_MODE_BOTTOM:
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if (y > hh)
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*in_y = y;
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else
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*in_y = gt->height - 1.0 - y;
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*in_x = x;
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break;
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default:
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g_assert_not_reached ();
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}
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GST_DEBUG_OBJECT (mirror, "Inversely mapped %d %d into %lf %lf",
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x, y, *in_x, *in_y);
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return TRUE;
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}
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static void
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gst_mirror_class_init (GstMirrorClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstGeometricTransformClass *gstgt_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstgt_class = (GstGeometricTransformClass *) klass;
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gst_element_class_set_details_simple (gstelement_class,
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"mirror",
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"Transform/Effect/Video",
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"Split the image into two halves and reflect one over each other",
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"Filippo Argiolas <filippo.argiolas@gmail.com>");
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gobject_class->set_property = gst_mirror_set_property;
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gobject_class->get_property = gst_mirror_get_property;
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g_object_class_install_property (gobject_class, PROP_MODE,
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g_param_spec_enum ("mode", "Mirror Mode",
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"How to split the video frame and which side reflect",
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GST_TYPE_MIRROR_MODE, DEFAULT_PROP_MODE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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parent_class = g_type_class_peek_parent (klass);
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gstgt_class->map_func = mirror_map;
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}
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static void
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gst_mirror_init (GstMirror * filter)
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{
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GstGeometricTransform *gt = GST_GEOMETRIC_TRANSFORM (filter);
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filter->mode = DEFAULT_PROP_MODE;
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gt->off_edge_pixels = GST_GT_OFF_EDGES_PIXELS_CLAMP;
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}
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gboolean
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gst_mirror_plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_mirror_debug, "mirror", 0, "mirror");
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return gst_element_register (plugin, "mirror", GST_RANK_NONE,
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GST_TYPE_MIRROR);
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}
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