mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-06 09:29:42 +00:00
343 lines
11 KiB
C++
343 lines
11 KiB
C++
/*
|
|
* GStreamer
|
|
* Copyright (C) 2005 Thomas Vander Stichele <thomas@apestaart.org>
|
|
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
|
|
* Copyright (C) 2010 Sreerenj Balachandran <bsreerenj@gmail.com>
|
|
*
|
|
* 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-opencvtextoverlay
|
|
*
|
|
* opencvtextoverlay renders the text on top of the video frames
|
|
*
|
|
* ## Example launch line
|
|
*
|
|
* |[
|
|
* gst-launch-1.0 videotestsrc ! videoconvert ! opencvtextoverlay text="Opencv Text Overlay " ! videoconvert ! xvimagesink
|
|
* ]|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#include "gsttextoverlay.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_opencv_text_overlay_debug);
|
|
#define GST_CAT_DEFAULT gst_opencv_opencv_text_overlay_debug
|
|
|
|
#define DEFAULT_PROP_TEXT "Opencv Text Overlay"
|
|
#define DEFAULT_PROP_WIDTH 1
|
|
#define DEFAULT_PROP_HEIGHT 1
|
|
#define DEFAULT_PROP_XPOS 50
|
|
#define DEFAULT_PROP_YPOS 50
|
|
#define DEFAULT_PROP_THICKNESS 2
|
|
#define DEFAULT_PROP_COLOR 0
|
|
|
|
|
|
/* Filter signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
#define DEFAULT_WIDTH 1.0
|
|
#define DEFAULT_HEIGHT 1.0
|
|
enum
|
|
{
|
|
PROP_0,
|
|
PROP_XPOS,
|
|
PROP_YPOS,
|
|
PROP_THICKNESS,
|
|
PROP_COLOR_R,
|
|
PROP_COLOR_G,
|
|
PROP_COLOR_B,
|
|
PROP_TEXT,
|
|
PROP_HEIGHT,
|
|
PROP_WIDTH
|
|
};
|
|
|
|
/* the capabilities of the inputs and outputs.
|
|
*
|
|
* describe the real formats here.
|
|
*/
|
|
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"))
|
|
);
|
|
|
|
G_DEFINE_TYPE_WITH_CODE (GstOpencvTextOverlay, gst_opencv_text_overlay,
|
|
GST_TYPE_OPENCV_VIDEO_FILTER,
|
|
GST_DEBUG_CATEGORY_INIT (gst_opencv_text_overlay_debug, "opencvtextoverlay",
|
|
0, "Template opencvtextoverlay");
|
|
);
|
|
GST_ELEMENT_REGISTER_DEFINE (opencvtextoverlay, "opencvtextoverlay",
|
|
GST_RANK_NONE, GST_TYPE_OPENCV_TEXT_OVERLAY);
|
|
|
|
static void gst_opencv_text_overlay_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec);
|
|
static void gst_opencv_text_overlay_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec);
|
|
|
|
static GstFlowReturn gst_opencv_text_overlay_transform_ip (GstOpencvVideoFilter
|
|
* filter, GstBuffer * buf, cv::Mat img);
|
|
|
|
/* Clean up */
|
|
static void
|
|
gst_opencv_text_overlay_finalize (GObject * obj)
|
|
{
|
|
GstOpencvTextOverlay *filter = GST_OPENCV_TEXT_OVERLAY (obj);
|
|
|
|
g_free (filter->textbuf);
|
|
|
|
G_OBJECT_CLASS (gst_opencv_text_overlay_parent_class)->finalize (obj);
|
|
}
|
|
|
|
/* initialize the opencvtextoverlay's class */
|
|
static void
|
|
gst_opencv_text_overlay_class_init (GstOpencvTextOverlayClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
gobject_class->finalize =
|
|
GST_DEBUG_FUNCPTR (gst_opencv_text_overlay_finalize);
|
|
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
|
|
|
|
gstopencvbasefilter_class->cv_trans_ip_func =
|
|
gst_opencv_text_overlay_transform_ip;
|
|
|
|
gobject_class->set_property = gst_opencv_text_overlay_set_property;
|
|
gobject_class->get_property = gst_opencv_text_overlay_get_property;
|
|
|
|
g_object_class_install_property (gobject_class, PROP_TEXT,
|
|
g_param_spec_string ("text", "text",
|
|
"Text to be display.", DEFAULT_PROP_TEXT,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_XPOS,
|
|
g_param_spec_int ("xpos", "horizontal position",
|
|
"Sets the Horizontal position", 0, G_MAXINT,
|
|
DEFAULT_PROP_XPOS,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_YPOS,
|
|
g_param_spec_int ("ypos", "vertical position",
|
|
"Sets the Vertical position", 0, G_MAXINT,
|
|
DEFAULT_PROP_YPOS,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_THICKNESS,
|
|
g_param_spec_int ("thickness", "font thickness",
|
|
"Sets the Thickness of Font", 0, G_MAXINT,
|
|
DEFAULT_PROP_THICKNESS,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_COLOR_R,
|
|
g_param_spec_int ("colorR", "color -Red ",
|
|
"Sets the color -R", 0, 255,
|
|
DEFAULT_PROP_COLOR,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_COLOR_G,
|
|
g_param_spec_int ("colorG", "color -Green",
|
|
"Sets the color -G", 0, 255,
|
|
DEFAULT_PROP_COLOR,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_COLOR_B,
|
|
g_param_spec_int ("colorB", "color -Blue",
|
|
"Sets the color -B", 0, 255,
|
|
DEFAULT_PROP_COLOR,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_HEIGHT,
|
|
g_param_spec_double ("height", "Height",
|
|
"Sets the height of fonts", 1.0, 5.0,
|
|
DEFAULT_HEIGHT,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_WIDTH,
|
|
g_param_spec_double ("width", "Width",
|
|
"Sets the width of fonts", 1.0, 5.0,
|
|
DEFAULT_WIDTH,
|
|
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
|
|
|
|
gst_element_class_set_static_metadata (element_class,
|
|
"opencvtextoverlay",
|
|
"Filter/Effect/Video",
|
|
"Write text on the top of video", "sreerenj<bsreerenj@gmail.com>");
|
|
|
|
gst_element_class_add_static_pad_template (element_class, &src_factory);
|
|
gst_element_class_add_static_pad_template (element_class, &sink_factory);
|
|
|
|
}
|
|
|
|
/* initialize the new element
|
|
* instantiate pads and add them to element
|
|
* set pad callback functions
|
|
* initialize instance structure
|
|
*/
|
|
static void
|
|
gst_opencv_text_overlay_init (GstOpencvTextOverlay * filter)
|
|
{
|
|
filter->textbuf = g_strdup (DEFAULT_PROP_TEXT);
|
|
filter->width = DEFAULT_PROP_WIDTH;
|
|
filter->height = DEFAULT_PROP_HEIGHT;
|
|
filter->xpos = DEFAULT_PROP_XPOS;
|
|
filter->ypos = DEFAULT_PROP_YPOS;
|
|
filter->thickness = DEFAULT_PROP_THICKNESS;
|
|
filter->colorR = DEFAULT_PROP_COLOR;
|
|
filter->colorG = DEFAULT_PROP_COLOR;
|
|
filter->colorB = DEFAULT_PROP_COLOR;
|
|
|
|
gst_opencv_video_filter_set_in_place (GST_OPENCV_VIDEO_FILTER_CAST (filter),
|
|
TRUE);
|
|
}
|
|
|
|
static void
|
|
gst_opencv_text_overlay_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstOpencvTextOverlay *filter = GST_OPENCV_TEXT_OVERLAY (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_TEXT:
|
|
g_free (filter->textbuf);
|
|
filter->textbuf = g_value_dup_string (value);
|
|
break;
|
|
case PROP_XPOS:
|
|
filter->xpos = g_value_get_int (value);
|
|
break;
|
|
case PROP_YPOS:
|
|
filter->ypos = g_value_get_int (value);
|
|
break;
|
|
case PROP_THICKNESS:
|
|
filter->thickness = g_value_get_int (value);
|
|
break;
|
|
|
|
case PROP_COLOR_R:
|
|
filter->colorR = g_value_get_int (value);
|
|
break;
|
|
case PROP_COLOR_G:
|
|
filter->colorG = g_value_get_int (value);
|
|
break;
|
|
case PROP_COLOR_B:
|
|
filter->colorB = g_value_get_int (value);
|
|
break;
|
|
|
|
case PROP_HEIGHT:
|
|
filter->height = g_value_get_double (value);
|
|
break;
|
|
case PROP_WIDTH:
|
|
filter->width = g_value_get_double (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_opencv_text_overlay_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstOpencvTextOverlay *filter = GST_OPENCV_TEXT_OVERLAY (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_TEXT:
|
|
g_value_set_string (value, filter->textbuf);
|
|
break;
|
|
case PROP_XPOS:
|
|
g_value_set_int (value, filter->xpos);
|
|
break;
|
|
case PROP_YPOS:
|
|
g_value_set_int (value, filter->ypos);
|
|
break;
|
|
case PROP_THICKNESS:
|
|
g_value_set_int (value, filter->thickness);
|
|
break;
|
|
case PROP_COLOR_R:
|
|
g_value_set_int (value, filter->colorR);
|
|
break;
|
|
case PROP_COLOR_G:
|
|
g_value_set_int (value, filter->colorG);
|
|
break;
|
|
case PROP_COLOR_B:
|
|
g_value_set_int (value, filter->colorB);
|
|
break;
|
|
case PROP_HEIGHT:
|
|
g_value_set_double (value, filter->height);
|
|
break;
|
|
case PROP_WIDTH:
|
|
g_value_set_double (value, filter->width);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* chain function
|
|
* this function does the actual processing
|
|
*/
|
|
static GstFlowReturn
|
|
gst_opencv_text_overlay_transform_ip (GstOpencvVideoFilter * base,
|
|
GstBuffer * buf, cv::Mat img)
|
|
{
|
|
GstOpencvTextOverlay *filter = GST_OPENCV_TEXT_OVERLAY (base);
|
|
|
|
cv::putText (img, filter->textbuf, cv::Point (filter->xpos,
|
|
filter->ypos), cv::FONT_HERSHEY_SIMPLEX,
|
|
(filter->width + filter->height) * 0.5, cv::Scalar (filter->colorR,
|
|
filter->colorG, filter->colorB), filter->thickness);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|