gstreamer/ext/opencv/gstcvequalizehist.c
Josh Doe 6e43f75df3 opencv: fix caps issues and extend supported caps for some elements
Some elements had vague caps, such as "video/x-raw-rgb", which caused problems
at least with textwrite. For other elements, the underlying OpenCV functions
support more than just one image type, so I increased the number of supported
caps.

I created a utility function "gst_opencv_caps_from_cv_image_type", so each
element creates caps directly from OpenCV image types, such as CV_8UC1 for
8-bit grayscale. This function uses gstvideo to create uniform caps.

https://bugzilla.gnome.org/show_bug.cgi?id=635304
2010-11-22 22:25:18 -03:00

135 lines
4.8 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., 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"
#include "gstcvequalizehist.h"
GST_DEBUG_CATEGORY_STATIC (gst_cv_equalize_hist_debug);
#define GST_CAT_DEFAULT gst_cv_equalize_hist_debug
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8));
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8));
GST_BOILERPLATE (GstCvEqualizeHist, gst_cv_equalize_hist,
GstOpencvVideoFilter, GST_TYPE_OPENCV_VIDEO_FILTER);
static GstFlowReturn gst_cv_equalize_hist_transform (GstOpencvVideoFilter *
filter, GstBuffer * buf, IplImage * img, GstBuffer * outbuf,
IplImage * outimg);
/* Clean up */
static void
gst_cv_equalize_hist_finalize (GObject * obj)
{
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
/* GObject vmethod implementations */
static void
gst_cv_equalize_hist_base_init (gpointer gclass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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_details_simple (element_class,
"cvequalizehist",
"Transform/Effect/Video",
"Applies cvEqualizeHist OpenCV function to the image",
"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
}
static void
gst_cv_equalize_hist_class_init (GstCvEqualizeHistClass * klass)
{
GObjectClass *gobject_class;
GstOpencvVideoFilterClass *gstopencvbasefilter_class;
gobject_class = (GObjectClass *) klass;
gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_cv_equalize_hist_finalize);
gstopencvbasefilter_class->cv_trans_func = gst_cv_equalize_hist_transform;
}
static void
gst_cv_equalize_hist_init (GstCvEqualizeHist * filter,
GstCvEqualizeHistClass * gclass)
{
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), FALSE);
}
static GstFlowReturn
gst_cv_equalize_hist_transform (GstOpencvVideoFilter * base,
GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg)
{
cvEqualizeHist (img, outimg);
return GST_FLOW_OK;
}
gboolean
gst_cv_equalize_hist_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_cv_equalize_hist_debug, "cvequalizehist", 0,
"cvequalizehist");
return gst_element_register (plugin, "cvequalizehist", GST_RANK_NONE,
GST_TYPE_CV_EQUALIZE_HIST);
}