gstreamer/ext/opencv/gstcvlaplace.cpp
Nicolas Dufresne ff6ed239b4 cvlaplace: Avoid extra copy of the output image
Simply produce the result into the output image provided by the base
class. This avoid useless copy. This also removes unchecked buffer map
and ensure that GstVideoMeta is respected (for stride mostly).

https://bugzilla.gnome.org/show_bug.cgi?id=775377
2016-12-01 21:56:10 -05:00

292 lines
9.6 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-cvlaplace
*
* Applies cvLaplace OpenCV function to the image.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 videotestsrc ! cvlaplace ! videoconvert ! autovideosink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "gstcvlaplace.h"
#include <opencv2/imgproc/imgproc_c.h>
GST_DEBUG_CATEGORY_STATIC (gst_cv_laplace_debug);
#define GST_CAT_DEFAULT gst_cv_laplace_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_APERTURE_SIZE,
PROP_SCALE,
PROP_SHIFT,
PROP_MASK
};
#define DEFAULT_APERTURE_SIZE 3
#define DEFAULT_SCALE_FACTOR 1.0
#define DEFAULT_SHIFT 0.0
#define DEFAULT_MASK TRUE
G_DEFINE_TYPE (GstCvLaplace, gst_cv_laplace, GST_TYPE_OPENCV_VIDEO_FILTER);
static void gst_cv_laplace_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_cv_laplace_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_cv_laplace_transform (GstOpencvVideoFilter * filter,
GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg);
static gboolean gst_cv_laplace_cv_set_caps (GstOpencvVideoFilter * trans,
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_laplace_finalize (GObject * obj)
{
GstCvLaplace *filter = GST_CV_LAPLACE (obj);
if (filter->intermediary_img) {
cvReleaseImage (&filter->intermediary_img);
cvReleaseImage (&filter->cvGray);
cvReleaseImage (&filter->Laplace);
}
G_OBJECT_CLASS (gst_cv_laplace_parent_class)->finalize (obj);
}
/* initialize the cvlaplace's class */
static void
gst_cv_laplace_class_init (GstCvLaplaceClass * 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_laplace_finalize);
gobject_class->set_property = gst_cv_laplace_set_property;
gobject_class->get_property = gst_cv_laplace_get_property;
gstopencvbasefilter_class->cv_trans_func = gst_cv_laplace_transform;
gstopencvbasefilter_class->cv_set_caps = gst_cv_laplace_cv_set_caps;
g_object_class_install_property (gobject_class, PROP_APERTURE_SIZE,
g_param_spec_int ("aperture-size", "aperture size",
"Size of the extended Laplace 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_SCALE,
g_param_spec_double ("scale", "scale factor",
"Scale factor", 0.0, G_MAXDOUBLE,
DEFAULT_SCALE_FACTOR, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_SHIFT,
g_param_spec_double ("shift", "Shift",
"Value added to the scaled source array elements", 0.0, G_MAXDOUBLE,
DEFAULT_SHIFT, (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 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,
"cvlaplace",
"Transform/Effect/Video",
"Applies cvLaplace OpenCV function to the image",
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
}
static void
gst_cv_laplace_init (GstCvLaplace * filter)
{
filter->aperture_size = DEFAULT_APERTURE_SIZE;
filter->scale = DEFAULT_SCALE_FACTOR;
filter->shift = DEFAULT_SHIFT;
filter->mask = DEFAULT_MASK;
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
FALSE);
}
static gboolean
gst_cv_laplace_cv_set_caps (GstOpencvVideoFilter * trans, gint in_width,
gint in_height, gint in_depth, gint in_channels, gint out_width,
gint out_height, gint out_depth, gint out_channels)
{
GstCvLaplace *filter = GST_CV_LAPLACE (trans);
if (filter->intermediary_img != NULL) {
cvReleaseImage (&filter->intermediary_img);
cvReleaseImage (&filter->cvGray);
cvReleaseImage (&filter->Laplace);
}
filter->intermediary_img =
cvCreateImage (cvSize (out_width, out_height), IPL_DEPTH_16S, 1);
filter->cvGray = cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U, 1);
filter->Laplace = cvCreateImage (cvSize (in_width, in_height), IPL_DEPTH_8U, 1);
return TRUE;
}
static void
gst_cv_laplace_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCvLaplace *filter = GST_CV_LAPLACE (object);
switch (prop_id) {
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_SCALE:
filter->scale = g_value_get_double (value);
break;
case PROP_SHIFT:
filter->shift = g_value_get_double (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_laplace_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstCvLaplace *filter = GST_CV_LAPLACE (object);
switch (prop_id) {
case PROP_APERTURE_SIZE:
g_value_set_int (value, filter->aperture_size);
break;
case PROP_SCALE:
g_value_set_double (value, filter->scale);
break;
case PROP_SHIFT:
g_value_set_double (value, filter->shift);
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_laplace_transform (GstOpencvVideoFilter * base, GstBuffer * buf,
IplImage * img, GstBuffer * outbuf, IplImage * outimg)
{
GstCvLaplace *filter = GST_CV_LAPLACE (base);
g_assert (filter->intermediary_img);
cvCvtColor (img, filter->cvGray, CV_RGB2GRAY);
cvLaplace (filter->cvGray, filter->intermediary_img, filter->aperture_size);
cvConvertScale (filter->intermediary_img, filter->Laplace, filter->scale,
filter->shift);
cvZero (outimg);
if (filter->mask) {
cvCopy (img, outimg, filter->Laplace);
} else {
cvCvtColor (filter->Laplace, outimg, CV_GRAY2RGB);
}
return GST_FLOW_OK;
}
gboolean
gst_cv_laplace_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_cv_laplace_debug, "cvlaplace", 0, "cvlaplace");
return gst_element_register (plugin, "cvlaplace", GST_RANK_NONE,
GST_TYPE_CV_LAPLACE);
}