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98752e51da
Generate a normalized gaussian kernel with given size and standard deviation on the fly. Remove "norm_const" uniform from convolution shaders and provide a normalized kernel instead. Remove norm_offset uniform as it was always zero, will reintroduce it if really needed in the future. Thanks to Eric Anholt for suggesting it. Save some ALU instruction calculating directly the coordinate for texture lookup instead of summing an offset. Still exceed maximum indirect texture lookups on i915, the only solution I see is using a 3x3 kernel.
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
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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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#ifndef _GST_GL_DIFFERENCEMATTE_H_
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#define _GST_GL_DIFFERENCEMATTE_H_
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#include <gstglfilter.h>
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#define GST_TYPE_GL_DIFFERENCEMATTE (gst_gl_differencematte_get_type())
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#define GST_GL_DIFFERENCEMATTE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_GL_DIFFERENCEMATTE,GstGLDifferenceMatte))
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#define GST_IS_GL_DIFFERENCEMATTE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_GL_DIFFERENCEMATTE))
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#define GST_GL_DIFFERENCEMATTE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) , GST_TYPE_GL_DIFFERENCEMATTE,GstGLDifferenceMatteClass))
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#define GST_IS_GL_DIFFERENCEMATTE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) , GST_TYPE_GL_DIFFERENCEMATTE))
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#define GST_GL_DIFFERENCEMATTE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) , GST_TYPE_GL_DIFFERENCEMATTE,GstGLDifferenceMatteClass))
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typedef struct _GstGLDifferenceMatte GstGLDifferenceMatte;
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typedef struct _GstGLDifferenceMatteClass GstGLDifferenceMatteClass;
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struct _GstGLDifferenceMatte
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{
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GstGLFilter filter;
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GstGLShader *shader[4];
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gchar *location;
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gboolean bg_has_changed;
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guchar *pixbuf;
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gint pbuf_width, pbuf_height;
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GLuint savedbgtexture;
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GLuint newbgtexture;
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GLuint midtexture[4];
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GLuint intexture;
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float kernel[9];
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};
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struct _GstGLDifferenceMatteClass
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{
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GstGLFilterClass filter_class;
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};
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#endif /* _GST_GL_DIFFERENCEMATTE_H_ */
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