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