gstreamer/ext/opencv/gstcvsobel.cpp

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/*
* GStreamer
* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
*
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* 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.
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*/
/**
* SECTION:element-cvsobel
*
* Applies the cvSobel OpenCV function to the image.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 videotestsrc ! cvsobel ! videoconvert ! autovideosink
* ]|
* </refsect2>
*/
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gstcvsobel.h"
#include <opencv2/imgproc/imgproc_c.h>
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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"))
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);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("RGB"))
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);
/* 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);
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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,
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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);
}
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/* initialize the cvsobel's class */
static void
gst_cv_sobel_class_init (GstCvSobelClass * klass)
{
GObjectClass *gobject_class;
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gobject_class = (GObjectClass *) klass;
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_cv_sobel_finalize);
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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;
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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)));
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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)));
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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<thiago.sousa.santos@collabora.co.uk>");
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}
static void
gst_cv_sobel_init (GstCvSobel * filter)
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{
gst_pad_set_event_function (GST_BASE_TRANSFORM_SINK_PAD (filter),
GST_DEBUG_FUNCPTR (gst_cv_sobel_handle_sink_event));
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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);
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}
/* 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)
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{
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;
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}
res = gst_pad_event_default (pad, parent, event);
return res;
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}
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,
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IplImage * img, GstBuffer * outbuf, IplImage * outimg)
{
GstCvSobel *filter = GST_CV_SOBEL (base);
GstMapInfo out_info;
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cvCvtColor (img, filter->cvGray, CV_RGB2GRAY);
cvSobel (filter->cvGray, filter->cvSobel, filter->x_order, filter->y_order,
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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));
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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);
}