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119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/* GStreamer
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* Copyright (C) <2010> Thiago Santos <thiago.sousa.santos@collabora.co.uk>
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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_GEOMETRIC_TRANSFORM_H__
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#define __GST_GEOMETRIC_TRANSFORM_H__
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#include <gst/video/gstvideofilter.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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#define GST_TYPE_GEOMETRIC_TRANSFORM \
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(gst_geometric_transform_get_type())
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#define GST_GEOMETRIC_TRANSFORM(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GEOMETRIC_TRANSFORM,GstGeometricTransform))
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#define GST_GEOMETRIC_TRANSFORM_CAST(obj) ((GstGeometricTransform *)(obj))
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#define GST_GEOMETRIC_TRANSFORM_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GEOMETRIC_TRANSFORM,GstGeometricTransformClass))
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#define GST_IS_GEOMETRIC_TRANSFORM(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GEOMETRIC_TRANSFORM))
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#define GST_IS_GEOMETRIC_TRANSFORM_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GEOMETRIC_TRANSFORM))
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#define GST_GEOMETRIC_TRANSFORM_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_GEOMETRIC_TRANSFORM,GstGeometricTransformClass))
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enum
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{
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GST_GT_OFF_EDGES_PIXELS_IGNORE = 0,
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GST_GT_OFF_EDGES_PIXELS_CLAMP,
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GST_GT_OFF_EDGES_PIXELS_WRAP
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};
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typedef struct _GstGeometricTransform GstGeometricTransform;
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typedef struct _GstGeometricTransformClass GstGeometricTransformClass;
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/**
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* GstGeometricTransformMapFunc:
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*
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* Given the output pixel position, this function calculates the input pixel
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* position. The element using this function will then copy the input pixel
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* data to the output pixel.
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*
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* @gt: The #GstGeometricTransform
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* @x: The output pixel x coordinate
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* @y: The output pixel y coordinate
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* @_input_x: The input pixel x coordinate
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* @_input_y: The input pixel y coordinate
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* Returns: True on success, false otherwise
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*/
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typedef gboolean (*GstGeometricTransformMapFunc) (GstGeometricTransform * gt,
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gint x, gint y, gdouble * _input_x, gdouble *_input_y);
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/**
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* GstGeometricTransformPrepareFunc:
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*
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* Called right before starting to calculate the mapping so that
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* instances might precalculate some values.
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*
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* Called with the object lock
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*/
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typedef gboolean (*GstGeometricTransformPrepareFunc) (
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GstGeometricTransform * gt);
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/**
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* GstGeometricTransform:
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*
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* Opaque datastructure.
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*/
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struct _GstGeometricTransform {
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GstVideoFilter videofilter;
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gint width, height;
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GstVideoFormat format;
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gint pixel_stride;
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gint row_stride;
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/* Must be set on NULL state.
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* Useful for subclasses that use don't want to use a fixed precalculated
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* pixel mapping table. Like 'diffuse' that uses random values for each pic.
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*/
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gboolean precalc_map;
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gboolean needs_remap;
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/* properties */
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gint off_edge_pixels;
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gdouble *map;
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};
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struct _GstGeometricTransformClass {
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GstVideoFilterClass parent_class;
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GstGeometricTransformMapFunc map_func;
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GstGeometricTransformPrepareFunc prepare_func;
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};
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GType gst_geometric_transform_get_type (void);
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void gst_geometric_transform_set_need_remap (GstGeometricTransform * gt);
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G_END_DECLS
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#endif /* __GST_GEOMETRIC_TRANSFORM_H__ */
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