/* * 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 ! decodebin ! videoconvert ! edgedetect ! videoconvert ! xvimagesink * ]| * */ #ifdef HAVE_CONFIG_H # include #endif #include #include "gstopencvutils.h" #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 (GstEdgeDetect, gst_edge_detect, GST_TYPE_ELEMENT); 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 gboolean gst_edge_detect_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstFlowReturn gst_edge_detect_chain (GstPad * pad, GstObject * parent, GstBuffer * buf); /* Clean up */ static void gst_edge_detect_finalize (GObject * obj) { GstEdgeDetect *filter = GST_EDGE_DETECT (obj); if (filter->cvImage != NULL) { cvReleaseImage (&filter->cvImage); cvReleaseImage (&filter->cvCEdge); cvReleaseImage (&filter->cvGray); cvReleaseImage (&filter->cvEdge); } 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; GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gobject_class = (GObjectClass *) 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; 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_pad_template (element_class, gst_static_pad_template_get (&src_factory)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_factory)); } /* initialize the new element * instantiate pads and add them to element * set pad calback functions * initialize instance structure */ static void gst_edge_detect_init (GstEdgeDetect * filter) { filter->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink"); GST_PAD_SET_PROXY_CAPS (filter->sinkpad); gst_pad_set_event_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_edge_detect_handle_sink_event)); gst_pad_set_chain_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_edge_detect_chain)); filter->srcpad = gst_pad_new_from_static_template (&src_factory, "src"); GST_PAD_SET_PROXY_CAPS (filter->srcpad); gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); filter->mask = TRUE; filter->threshold1 = 50; filter->threshold2 = 150; filter->aperture = 3; } 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_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstEdgeDetect *filter; gint width, height; GstStructure *structure; gboolean res = TRUE; filter = GST_EDGE_DETECT (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); structure = gst_caps_get_structure (caps, 0); gst_structure_get_int (structure, "width", &width); gst_structure_get_int (structure, "height", &height); if (filter->cvImage != NULL) { cvReleaseImage (&filter->cvImage); cvReleaseImage (&filter->cvCEdge); cvReleaseImage (&filter->cvGray); cvReleaseImage (&filter->cvEdge); } filter->cvImage = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3); filter->cvCEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3); filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1); filter->cvEdge = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1); break; } default: break; } res = gst_pad_event_default (pad, parent, event); return res; } /* chain function * this function does the actual processing */ static GstFlowReturn gst_edge_detect_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstEdgeDetect *filter; GstBuffer *outbuf; GstMapInfo in_info; GstMapInfo out_info; filter = GST_EDGE_DETECT (parent); buf = gst_buffer_make_writable (buf); gst_buffer_map (buf, &in_info, GST_MAP_WRITE); filter->cvImage->imageData = (char *) in_info.data; cvCvtColor (filter->cvImage, filter->cvGray, CV_RGB2GRAY); cvCanny (filter->cvGray, filter->cvEdge, filter->threshold1, filter->threshold2, filter->aperture); cvZero (filter->cvCEdge); if (filter->mask) { cvCopy (filter->cvImage, filter->cvCEdge, filter->cvEdge); } else { cvCvtColor (filter->cvEdge, filter->cvCEdge, CV_GRAY2RGB); } outbuf = gst_buffer_new_and_alloc (filter->cvCEdge->imageSize); gst_buffer_copy_into (outbuf, buf, (GstBufferCopyFlags) GST_BUFFER_COPY_METADATA, 0, -1); gst_buffer_map (outbuf, &out_info, GST_MAP_WRITE); memcpy (out_info.data, filter->cvCEdge->imageData, gst_buffer_get_size (outbuf)); gst_buffer_unmap (buf, &in_info); gst_buffer_unmap (outbuf, &out_info); gst_buffer_unref (buf); return gst_pad_push (filter->srcpad, outbuf); } /* entry point to initialize the plug-in * initialize the plug-in itself * register the element factories and other features */ gboolean gst_edge_detect_plugin_init (GstPlugin * plugin) { /* debug category for fltering log messages * */ GST_DEBUG_CATEGORY_INIT (gst_edge_detect_debug, "edgedetect", 0, "Performs canny edge detection on videos and images"); return gst_element_register (plugin, "edgedetect", GST_RANK_NONE, GST_TYPE_EDGE_DETECT); }