| /* GStreamer |
| * Copyright (C) Collabora Ltd. |
| * Author: Matthieu Bouron <matthieu.bouron@collabora.com> |
| * Copyright (C) 2015, Matthew Waters <matthew@centricular.com> |
| * |
| * 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_VIDEO_AFFINE_TRANSFORMATION_META_H__ |
| #define __GST_VIDEO_AFFINE_TRANSFORMATION_META_H__ |
| |
| #include <gst/gst.h> |
| #include <gst/video/video.h> |
| |
| G_BEGIN_DECLS |
| |
| #define GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE (gst_video_affine_transformation_meta_api_get_type()) |
| #define GST_VIDEO_AFFINE_TRANSFORMATION_META_INFO (gst_video_affine_transformation_meta_get_info()) |
| |
| typedef struct _GstVideoAffineTransformationMeta GstVideoAffineTransformationMeta; |
| typedef gboolean (*GstVideoAffineTransformationGetMatrix) (GstVideoAffineTransformationMeta * meta, gfloat * matrix); |
| |
| #define GST_CAPS_FEATURE_META_GST_VIDEO_AFFINE_TRANSFORMATION_META "meta:GstVideoAffineTransformation" |
| #define GST_BUFFER_POOL_OPTION_VIDEO_AFFINE_TRANSFORMATION_META "GstBufferPoolOptionVideoAffineTransformation" |
| |
| /** |
| * GstVideoAffineTransformationMeta: |
| * @meta: parent #GstMeta |
| * @matrix: the column-major 4x4 transformation matrix |
| * |
| * Extra buffer metadata for performing an affine transformation using a 4x4 |
| * matrix. The transformation matrix can be composed with |
| * gst_video_affine_transformation_meta_apply_matrix(). |
| * |
| * The vertices operated on are all in the range 0 to 1, not in |
| * Normalized Device Coordinates (-1 to +1). Transforming points in this space |
| * are assumed to have an origin at (0.5, 0.5, 0.5) in a left-handed coordinate |
| * system with the x-axis moving horizontally (positive values to the right), |
| * the y-axis moving vertically (positive values up the screen) and the z-axis |
| * perpendicular to the screen (positive values into the screen). |
| * |
| * Since: 1.8 |
| */ |
| struct _GstVideoAffineTransformationMeta |
| { |
| GstMeta meta; |
| |
| gfloat matrix[16]; |
| }; |
| |
| GST_VIDEO_API |
| GType gst_video_affine_transformation_meta_api_get_type (void); |
| |
| GST_VIDEO_API |
| const GstMetaInfo *gst_video_affine_transformation_meta_get_info (void); |
| |
| #define gst_buffer_get_video_affine_transformation_meta(b) \ |
| ((GstVideoAffineTransformationMeta *)gst_buffer_get_meta((b),GST_VIDEO_AFFINE_TRANSFORMATION_META_API_TYPE)) |
| GST_VIDEO_API |
| GstVideoAffineTransformationMeta *gst_buffer_add_video_affine_transformation_meta (GstBuffer * buffer); |
| |
| GST_VIDEO_API |
| void gst_video_affine_transformation_meta_apply_matrix (GstVideoAffineTransformationMeta * meta, |
| const gfloat matrix[16]); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_VIDEO_AFFINE_TRANSFORMATION_META_H__ */ |