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6e43f75df3
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
135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
/*
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* GStreamer
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* Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Alternatively, the contents of this file may be used under the
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* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
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* which case the following provisions apply instead of the ones
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* mentioned above:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gst/gst.h>
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#include "gstopencvutils.h"
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#include "gstcvequalizehist.h"
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GST_DEBUG_CATEGORY_STATIC (gst_cv_equalize_hist_debug);
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#define GST_CAT_DEFAULT gst_cv_equalize_hist_debug
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8));
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_GRAY8));
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GST_BOILERPLATE (GstCvEqualizeHist, gst_cv_equalize_hist,
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GstOpencvVideoFilter, GST_TYPE_OPENCV_VIDEO_FILTER);
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static GstFlowReturn gst_cv_equalize_hist_transform (GstOpencvVideoFilter *
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filter, GstBuffer * buf, IplImage * img, GstBuffer * outbuf,
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IplImage * outimg);
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/* Clean up */
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static void
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gst_cv_equalize_hist_finalize (GObject * obj)
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{
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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/* GObject vmethod implementations */
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static void
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gst_cv_equalize_hist_base_init (gpointer gclass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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gst_element_class_set_details_simple (element_class,
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"cvequalizehist",
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"Transform/Effect/Video",
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"Applies cvEqualizeHist OpenCV function to the image",
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"Thiago Santos<thiago.sousa.santos@collabora.co.uk>");
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}
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static void
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gst_cv_equalize_hist_class_init (GstCvEqualizeHistClass * klass)
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{
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GObjectClass *gobject_class;
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GstOpencvVideoFilterClass *gstopencvbasefilter_class;
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gobject_class = (GObjectClass *) klass;
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gstopencvbasefilter_class = (GstOpencvVideoFilterClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_cv_equalize_hist_finalize);
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gstopencvbasefilter_class->cv_trans_func = gst_cv_equalize_hist_transform;
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}
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static void
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gst_cv_equalize_hist_init (GstCvEqualizeHist * filter,
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GstCvEqualizeHistClass * gclass)
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{
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gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), FALSE);
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}
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static GstFlowReturn
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gst_cv_equalize_hist_transform (GstOpencvVideoFilter * base,
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GstBuffer * buf, IplImage * img, GstBuffer * outbuf, IplImage * outimg)
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{
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cvEqualizeHist (img, outimg);
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return GST_FLOW_OK;
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}
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gboolean
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gst_cv_equalize_hist_plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_cv_equalize_hist_debug, "cvequalizehist", 0,
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"cvequalizehist");
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return gst_element_register (plugin, "cvequalizehist", GST_RANK_NONE,
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GST_TYPE_CV_EQUALIZE_HIST);
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}
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