/* * GStreamer * Copyright (C) 2005 Thomas Vander Stichele * Copyright (C) 2005 Ronald S. Bultje * Copyright (C) 2008 Michael Sheldon * * 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-edgedetect * * Performs canny edge detection on videos and images * * ## Example launch line * * |[ * gst-launch-1.0 videotestsrc ! videoconvert ! edgedetect ! videoconvert ! xvimagesink * ]| */ #ifdef HAVE_CONFIG_H # include #endif #include "gstedgedetect.h" #include GST_DEBUG_CATEGORY_STATIC (gst_edge_detect_debug); #define GST_CAT_DEFAULT gst_edge_detect_debug /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, PROP_THRESHOLD1, PROP_THRESHOLD2, PROP_APERTURE, PROP_MASK }; /* the capabilities of the inputs and outputs. * * describe the real formats here. */ static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB")) ); static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB")) ); G_DEFINE_TYPE_WITH_CODE (GstEdgeDetect, gst_edge_detect, GST_TYPE_OPENCV_VIDEO_FILTER, GST_DEBUG_CATEGORY_INIT (gst_edge_detect_debug, "edgedetect", 0, "Performs canny edge detection on videos and images");); GST_ELEMENT_REGISTER_DEFINE (edgedetect, "edgedetect", GST_RANK_NONE, GST_TYPE_EDGE_DETECT); static void gst_edge_detect_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_edge_detect_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstFlowReturn gst_edge_detect_transform (GstOpencvVideoFilter * filter, GstBuffer * buf, cv::Mat img, GstBuffer * outbuf, cv::Mat outimg); static gboolean gst_edge_detect_set_caps (GstOpencvVideoFilter * transform, gint in_width, gint in_height, int in_cv_type, gint out_width, gint out_height, int out_cv_type); /* Clean up */ static void gst_edge_detect_finalize (GObject * obj) { GstEdgeDetect *filter = GST_EDGE_DETECT (obj); filter->cvGray.release (); filter->cvEdge.release (); G_OBJECT_CLASS (gst_edge_detect_parent_class)->finalize (obj); } /* initialize the edgedetect's class */ static void gst_edge_detect_class_init (GstEdgeDetectClass * klass) { GObjectClass *gobject_class; GstOpencvVideoFilterClass *gstopencvbasefilter_class; GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gobject_class = (GObjectClass *) klass; gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass; gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_edge_detect_finalize); gobject_class->set_property = gst_edge_detect_set_property; gobject_class->get_property = gst_edge_detect_get_property; gstopencvbasefilter_class->cv_trans_func = gst_edge_detect_transform; gstopencvbasefilter_class->cv_set_caps = gst_edge_detect_set_caps; g_object_class_install_property (gobject_class, PROP_MASK, g_param_spec_boolean ("mask", "Mask", "Sets whether the detected edges should be used as a mask on the original input or not", TRUE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_THRESHOLD1, g_param_spec_int ("threshold1", "Threshold1", "Threshold value for canny edge detection", 0, 1000, 50, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_THRESHOLD2, g_param_spec_int ("threshold2", "Threshold2", "Second threshold value for canny edge detection", 0, 1000, 150, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_APERTURE, g_param_spec_int ("aperture", "Aperture", "Aperture size for Sobel operator (Must be either 3, 5 or 7", 3, 7, 3, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); gst_element_class_set_static_metadata (element_class, "edgedetect", "Filter/Effect/Video", "Performs canny edge detection on videos and images.", "Michael Sheldon "); gst_element_class_add_static_pad_template (element_class, &src_factory); gst_element_class_add_static_pad_template (element_class, &sink_factory); } /* initialize the new element * instantiate pads and add them to element * set pad callback functions * initialize instance structure */ static void gst_edge_detect_init (GstEdgeDetect * filter) { filter->mask = TRUE; filter->threshold1 = 50; filter->threshold2 = 150; filter->aperture = 3; gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter), FALSE); } static void gst_edge_detect_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstEdgeDetect *filter = GST_EDGE_DETECT (object); switch (prop_id) { case PROP_MASK: filter->mask = g_value_get_boolean (value); break; case PROP_THRESHOLD1: filter->threshold1 = g_value_get_int (value); break; case PROP_THRESHOLD2: filter->threshold2 = g_value_get_int (value); break; case PROP_APERTURE: filter->aperture = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_edge_detect_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstEdgeDetect *filter = GST_EDGE_DETECT (object); switch (prop_id) { case PROP_MASK: g_value_set_boolean (value, filter->mask); break; case PROP_THRESHOLD1: g_value_set_int (value, filter->threshold1); break; case PROP_THRESHOLD2: g_value_set_int (value, filter->threshold2); break; case PROP_APERTURE: g_value_set_int (value, filter->aperture); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* GstElement vmethod implementations */ /* this function handles the link with other elements */ static gboolean gst_edge_detect_set_caps (GstOpencvVideoFilter * transform, gint in_width, gint in_height, int in_cv_type, gint out_width, gint out_height, int out_cv_type) { GstEdgeDetect *filter = GST_EDGE_DETECT (transform); filter->cvGray.create (cv::Size (in_width, in_height), CV_8UC1); filter->cvEdge.create (cv::Size (in_width, in_height), CV_8UC1); return TRUE; } static GstFlowReturn gst_edge_detect_transform (GstOpencvVideoFilter * base, GstBuffer * buf, cv::Mat img, GstBuffer * outbuf, cv::Mat outimg) { GstEdgeDetect *filter = GST_EDGE_DETECT (base); cv::cvtColor (img, filter->cvGray, cv::COLOR_RGB2GRAY); cv::Canny (filter->cvGray, filter->cvEdge, filter->threshold1, filter->threshold2, filter->aperture); outimg.setTo (cv::Scalar::all (0)); if (filter->mask) { img.copyTo (outimg, filter->cvEdge); } else { cv::cvtColor (filter->cvEdge, outimg, cv::COLOR_GRAY2RGB); } return GST_FLOW_OK; }