/* 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__ */