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<html>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>gstvideoaffinetransformationmeta: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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                  Description
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gstvideoaffinetransformationmeta
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gstvideoaffinetransformationmeta
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Functions
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GstVideoAffineTransformationMeta *
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gst_buffer_add_video_affine_transformation_meta ()
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#define
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gst_buffer_get_video_affine_transformation_meta()
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void
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gst_video_affine_transformation_meta_apply_matrix ()
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Types and Values
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struct
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GstVideoAffineTransformationMeta
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Includes
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#include <gst/video/gstvideoaffinetransformationmeta.h>
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Description
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Functions
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gst_buffer_add_video_affine_transformation_meta ()
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GstVideoAffineTransformationMeta *
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gst_buffer_add_video_affine_transformation_meta
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                               (GstBuffer *buffer);
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Attaches GstVideoAffineTransformationMeta metadata to buffer
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 with
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the given parameters.
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Parameters
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buffer
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a GstBuffer
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Returns
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the GstVideoAffineTransformationMeta on buffer
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.
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[transfer none]
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Since: 1.8
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gst_buffer_get_video_affine_transformation_meta()
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#define             gst_buffer_get_video_affine_transformation_meta(b)
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gst_video_affine_transformation_meta_apply_matrix ()
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void
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gst_video_affine_transformation_meta_apply_matrix
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                               (GstVideoAffineTransformationMeta *meta,
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                                const gfloat matrix[16]);
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Apply a transformation using the given 4x4 transformation matrix.
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Performs the multiplication, meta->matrix X matrix.
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Parameters
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meta
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a GstVideoAffineTransformationMeta
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matrix
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a 4x4 transformation matrix to be applied
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Since: 1.8
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Types and Values
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struct GstVideoAffineTransformationMeta
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struct GstVideoAffineTransformationMeta {
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  GstMeta meta;
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  gfloat matrix[16];
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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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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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Members
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GstMeta meta;
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parent GstMeta
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gfloat matrix[16];
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the column-major 4x4 transformation matrix
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Since: 1.8
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Generated by GTK-Doc V1.27
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</body>
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</html>

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