| /* |
| * GStreamer |
| * Copyright (C) 2010 Filippo Argiolas <filippo.argiolas@gmail.com> |
| * |
| * 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. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <gst/gst.h> |
| #include <math.h> |
| |
| #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 <filippo.argiolas@gmail.com>"); |
| |
| 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); |
| } |