/* * GStreamer * Copyright (C) 2010 Thiago Santos * * 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-cvsobel * * Applies the cvSobel OpenCV function to the image. * * * Example launch line * |[ * gst-launch-1.0 videotestsrc ! cvsobel ! videoconvert ! autovideosink * ]| * */ #ifdef HAVE_CONFIG_H # include #endif #include "gstcvsobel.h" #include GST_DEBUG_CATEGORY_STATIC (gst_cv_sobel_debug); #define GST_CAT_DEFAULT gst_cv_sobel_debug 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")) ); /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { PROP_0, PROP_X_ORDER, PROP_Y_ORDER, PROP_APERTURE_SIZE }; #define DEFAULT_X_ORDER 1 #define DEFAULT_Y_ORDER 0 #define DEFAULT_APERTURE_SIZE 3 G_DEFINE_TYPE (GstCvSobel, gst_cv_sobel, GST_TYPE_OPENCV_VIDEO_FILTER); static void gst_cv_sobel_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_cv_sobel_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_cv_sobel_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstFlowReturn gst_cv_sobel_transform (GstOpencvVideoFilter * filter, GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg); static gboolean gst_cv_sobel_set_caps (GstOpencvVideoFilter * transform, gint in_width, gint in_height, gint in_depth, gint in_channels, gint out_width, gint out_height, gint out_depth, gint out_channels); /* Clean up */ static void gst_cv_sobel_finalize (GObject * obj) { GstCvSobel *filter = GST_CV_SOBEL (obj); if (filter->cvSobel != NULL) { cvReleaseImage (&filter->cvCSobel); cvReleaseImage (&filter->cvGray); cvReleaseImage (&filter->cvSobel); } G_OBJECT_CLASS (gst_cv_sobel_parent_class)->finalize (obj); } /* initialize the cvsobel's class */ static void gst_cv_sobel_class_init (GstCvSobelClass * 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_cv_sobel_finalize); gobject_class->set_property = gst_cv_sobel_set_property; gobject_class->get_property = gst_cv_sobel_get_property; gstopencvbasefilter_class->cv_trans_func = gst_cv_sobel_transform; gstopencvbasefilter_class->cv_set_caps = gst_cv_sobel_set_caps; g_object_class_install_property (gobject_class, PROP_X_ORDER, g_param_spec_int ("x-order", "x order", "Order of the derivative x", -1, G_MAXINT, DEFAULT_X_ORDER, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_Y_ORDER, g_param_spec_int ("y-order", "y order", "Order of the derivative y", -1, G_MAXINT, DEFAULT_Y_ORDER, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_APERTURE_SIZE, g_param_spec_int ("aperture-size", "aperture size", "Size of the extended Sobel Kernel (1, 3, 5 or 7)", 1, 7, DEFAULT_APERTURE_SIZE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); 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)); gst_element_class_set_static_metadata (element_class, "cvsobel", "Transform/Effect/Video", "Applies cvSobel OpenCV function to the image", "Thiago Santos"); } static void gst_cv_sobel_init (GstCvSobel * filter) { gst_pad_set_event_function (GST_BASE_TRANSFORM_SINK_PAD (filter), GST_DEBUG_FUNCPTR (gst_cv_sobel_handle_sink_event)); filter->x_order = DEFAULT_X_ORDER; filter->y_order = DEFAULT_Y_ORDER; filter->aperture_size = DEFAULT_APERTURE_SIZE; gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter), FALSE); } /* this function handles the link with other elements */ static gboolean gst_cv_sobel_set_caps (GstOpencvVideoFilter * transform, gint in_width, gint in_height, gint in_depth, gint in_channels, gint out_width, gint out_height, gint out_depth, gint out_channels) { GstCvSobel *filter = GST_CV_SOBEL (transform); if (filter->cvGray) cvReleaseImage (&filter->cvGray); filter->cvGray = cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U, 1); return TRUE; } static gboolean gst_cv_sobel_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstCvSobel *filter; gint width, height; GstStructure *structure; gboolean res = TRUE; filter = GST_CV_SOBEL (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->cvSobel != NULL) { cvReleaseImage (&filter->cvCSobel); cvReleaseImage (&filter->cvGray); cvReleaseImage (&filter->cvSobel); } filter->cvCSobel = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 3); filter->cvGray = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1); filter->cvSobel = cvCreateImage (cvSize (width, height), IPL_DEPTH_8U, 1); break; } default: break; } res = gst_pad_event_default (pad, parent, event); return res; } static void gst_cv_sobel_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstCvSobel *filter = GST_CV_SOBEL (object); switch (prop_id) { case PROP_X_ORDER: filter->x_order = g_value_get_int (value); break; case PROP_Y_ORDER: filter->y_order = g_value_get_int (value); break; case PROP_APERTURE_SIZE:{ gint as = g_value_get_int (value); if (as % 2 != 1) { GST_WARNING_OBJECT (filter, "Invalid value %d for aperture size", as); } else filter->aperture_size = g_value_get_int (value); } break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_cv_sobel_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstCvSobel *filter = GST_CV_SOBEL (object); switch (prop_id) { case PROP_X_ORDER: g_value_set_int (value, filter->x_order); break; case PROP_Y_ORDER: g_value_set_int (value, filter->y_order); break; case PROP_APERTURE_SIZE: g_value_set_int (value, filter->aperture_size); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstFlowReturn gst_cv_sobel_transform (GstOpencvVideoFilter * base, GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg) { GstCvSobel *filter = GST_CV_SOBEL (base); GstMapInfo out_info; cvCvtColor (img, filter->cvGray, CV_RGB2GRAY); cvSobel (filter->cvGray, filter->cvSobel, filter->x_order, filter->y_order, filter->aperture_size); cvZero (filter->cvCSobel); cvCvtColor (filter->cvSobel, filter->cvCSobel, CV_GRAY2RGB); gst_buffer_map (outbuf, &out_info, GST_MAP_WRITE); memcpy (out_info.data, filter->cvCSobel->imageData, gst_buffer_get_size (outbuf)); return GST_FLOW_OK; } gboolean gst_cv_sobel_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_cv_sobel_debug, "cvsobel", 0, "cvsobel"); return gst_element_register (plugin, "cvsobel", GST_RANK_NONE, GST_TYPE_CV_SOBEL); }