gstreamer/ext/opencv/gstcvsobel.c

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/*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include "gstopencvutils.h"
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#include "gstcvsobel.h"
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_GRAY8)
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);
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define BYTE_ORDER_STRING "BIG_ENDIAN"
#else
#define BYTE_ORDER_STRING "LITTLE_ENDIAN"
#endif
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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_GRAY16 (BYTE_ORDER_STRING))
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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
GST_BOILERPLATE (GstCvSobel, gst_cv_sobel, GstOpencvVideoFilter,
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 GstCaps *gst_cv_sobel_transform_caps (GstBaseTransform * trans,
GstPadDirection dir, GstCaps * caps);
static GstFlowReturn gst_cv_sobel_transform (GstOpencvVideoFilter * filter,
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GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg);
/* GObject vmethod implementations */
static void
gst_cv_sobel_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
gst_element_class_add_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
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gst_element_class_set_details_simple (element_class,
"cvsobel",
"Transform/Effect/Video",
"Applies cvSobel OpenCV function to the image",
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
}
/* initialize the cvsobel's class */
static void
gst_cv_sobel_class_init (GstCvSobelClass * klass)
{
GObjectClass *gobject_class;
GstBaseTransformClass *gstbasetransform_class;
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
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gobject_class = (GObjectClass *) klass;
gstbasetransform_class = (GstBaseTransformClass *) klass;
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gst_cv_sobel_set_property;
gobject_class->get_property = gst_cv_sobel_get_property;
gstbasetransform_class->transform_caps = gst_cv_sobel_transform_caps;
gstopencvbasefilter_class->cv_trans_func = gst_cv_sobel_transform;
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, 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, 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, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_cv_sobel_init (GstCvSobel * filter, GstCvSobelClass * gclass)
{
filter->x_order = DEFAULT_X_ORDER;
filter->y_order = DEFAULT_Y_ORDER;
filter->aperture_size = DEFAULT_APERTURE_SIZE;
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), FALSE);
}
static GstCaps *
gst_cv_sobel_transform_caps (GstBaseTransform * trans, GstPadDirection dir,
GstCaps * caps)
{
GstCaps *output = NULL;
GstStructure *structure;
gint i;
output = gst_caps_copy (caps);
/* we accept anything from the template caps for either side */
switch (dir) {
case GST_PAD_SINK:
for (i = 0; i < gst_caps_get_size (output); i++) {
structure = gst_caps_get_structure (output, i);
gst_structure_set (structure,
"depth", G_TYPE_INT, 16,
"bpp", G_TYPE_INT, 16,
"endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
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}
break;
case GST_PAD_SRC:
for (i = 0; i < gst_caps_get_size (output); i++) {
structure = gst_caps_get_structure (output, i);
gst_structure_set (structure,
"depth", G_TYPE_INT, 8, "bpp", G_TYPE_INT, 8, NULL);
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gst_structure_remove_field (structure, "endianness");
}
break;
default:
gst_caps_unref (output);
output = NULL;
g_assert_not_reached ();
break;
}
return output;
}
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);
cvSobel (img, outimg, filter->x_order, filter->y_order,
filter->aperture_size);
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);
}