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ae429de8f6
We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
81 lines
3.3 KiB
C
81 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) Collabora Ltd.
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* Author: Matthieu Bouron <matthieu.bouron@collabora.com>
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* Copyright (C) 2015, Matthew Waters <matthew@centricular.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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_AFFINE_TRANSFORMATION_META_H__
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#define __GST_VIDEO_AFFINE_TRANSFORMATION_META_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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#define GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE (gst_video_affine_transformation_meta_api_get_type())
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#define GST_VIDEO_AFFINE_TRANSFORMATION_META_INFO (gst_video_affine_transformation_meta_get_info())
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typedef struct _GstVideoAffineTransformationMeta GstVideoAffineTransformationMeta;
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typedef gboolean (*GstVideoAffineTransformationGetMatrix) (GstVideoAffineTransformationMeta * meta, gfloat * matrix);
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#define GST_CAPS_FEATURE_META_GST_VIDEO_AFFINE_TRANSFORMATION_META "meta:GstVideoAffineTransformation"
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#define GST_BUFFER_POOL_OPTION_VIDEO_AFFINE_TRANSFORMATION_META "GstBufferPoolOptionVideoAffineTransformation"
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/**
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* GstVideoAffineTransformationMeta:
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* @meta: parent #GstMeta
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* @matrix: the column-major 4x4 transformation matrix
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*
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* Extra buffer metadata for performing an affine transformation using a 4x4
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* matrix. The transformation matrix can be composed with
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* gst_video_affine_transformation_meta_apply_matrix().
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*
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* The vertices operated on are all in the range 0 to 1, not in
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* Normalized Device Coordinates (-1 to +1). Transforming points in this space
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* are assumed to have an origin at (0.5, 0.5, 0.5) in a left-handed coordinate
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* system with the x-axis moving horizontally (positive values to the right),
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* the y-axis moving vertically (positive values up the screen) and the z-axis
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* perpendicular to the screen (positive values into the screen).
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*
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* Since: 1.8
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*/
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struct _GstVideoAffineTransformationMeta
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{
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GstMeta meta;
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gfloat matrix[16];
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};
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GST_VIDEO_API
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GType gst_video_affine_transformation_meta_api_get_type (void);
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GST_VIDEO_API
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const GstMetaInfo *gst_video_affine_transformation_meta_get_info (void);
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#define gst_buffer_get_video_affine_transformation_meta(b) \
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((GstVideoAffineTransformationMeta *)gst_buffer_get_meta((b),GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE))
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GST_VIDEO_API
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GstVideoAffineTransformationMeta *gst_buffer_add_video_affine_transformation_meta (GstBuffer * buffer);
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GST_VIDEO_API
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void gst_video_affine_transformation_meta_apply_matrix (GstVideoAffineTransformationMeta * meta,
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const gfloat matrix[16]);
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G_END_DECLS
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#endif /* __GST_VIDEO_AFFINE_TRANSFORMATION_META_H__ */
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