gstreamer/ext/opencv/gstcvsobel.cpp
2019-05-29 22:58:08 +02:00

280 lines
9 KiB
C++

/*
* GStreamer
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
*
* 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 <config.h>
#endif
#include "gstcvsobel.h"
#include <opencv2/imgproc.hpp>
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,
PROP_MASK
};
#define DEFAULT_X_ORDER 1
#define DEFAULT_Y_ORDER 0
#define DEFAULT_APERTURE_SIZE 3
#define DEFAULT_MASK TRUE
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 GstFlowReturn gst_cv_sobel_transform (GstOpencvVideoFilter * filter,
GstBuffer * buf, cv::Mat img, GstBuffer * outbuf, cv::Mat outimg);
static gboolean gst_cv_sobel_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_cv_sobel_finalize (GObject * obj)
{
GstCvSobel *filter = GST_CV_SOBEL (obj);
filter->cvGray.release ();
filter->cvSobel.release ();
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)));
g_object_class_install_property (gobject_class, PROP_MASK,
g_param_spec_boolean ("mask", "Mask",
"Sets whether the detected derivative edges should be used as a mask on the original input or not",
DEFAULT_MASK,
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
gst_element_class_set_static_metadata (element_class,
"cvsobel",
"Transform/Effect/Video",
"Applies cvSobel OpenCV function to the image",
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
}
static void
gst_cv_sobel_init (GstCvSobel * filter)
{
filter->x_order = DEFAULT_X_ORDER;
filter->y_order = DEFAULT_Y_ORDER;
filter->aperture_size = DEFAULT_APERTURE_SIZE;
filter->mask = DEFAULT_MASK;
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, int in_cv_type,
gint out_width, gint out_height, int out_cv_type)
{
GstCvSobel *filter = GST_CV_SOBEL (transform);
filter->cvGray.create (cv::Size (in_width, in_height), CV_8UC1);
filter->cvSobel.create (cv::Size (out_width, out_height), CV_8UC1);
return TRUE;
}
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;
case PROP_MASK:
filter->mask = g_value_get_boolean (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;
case PROP_MASK:
g_value_set_boolean (value, filter->mask);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_cv_sobel_transform (GstOpencvVideoFilter * base, GstBuffer * buf,
cv::Mat img, GstBuffer * outbuf, cv::Mat outimg)
{
GstCvSobel *filter = GST_CV_SOBEL (base);
cv::cvtColor (img, filter->cvGray, cv::COLOR_RGB2GRAY);
cv::Sobel (filter->cvGray, filter->cvSobel, filter->cvGray.depth (),
filter->x_order, filter->y_order, filter->aperture_size);
outimg.setTo (cv::Scalar::all (0));
if (filter->mask) {
img.copyTo (outimg, filter->cvSobel);
} else {
cv::cvtColor (filter->cvSobel, outimg, cv::COLOR_GRAY2RGB);
}
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);
}