gstreamer/ext/gl/gstgltransformation.h
Matthew Waters 9d66a3447f gltransformation: rewrite the inverse transformation logic
It now returns the correct values for both orthographic and perspective
projections and takes into account the aspect ratio of the video, handles
the Y-flipping in GL and by us and uses some more helpers from graphene.
2016-08-19 16:09:04 +10:00

98 lines
2.9 KiB
C

/*
* GStreamer
* Copyright (C) 2014 Lubosz Sarnecki <lubosz@gmail.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_GL_TRANSFORMATION_H_
#define _GST_GL_TRANSFORMATION_H_
#include <gst/gl/gstglfilter.h>
#include <graphene.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_TRANSFORMATION (gst_gl_transformation_get_type())
#define GST_GL_TRANSFORMATION(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_TRANSFORMATION,GstGLTransformation))
#define GST_IS_GL_TRANSFORMATION(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_TRANSFORMATION))
#define GST_GL_TRANSFORMATION_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_TRANSFORMATION,GstGLTransformationClass))
#define GST_IS_GL_TRANSFORMATION_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_TRANSFORMATION))
#define GST_GL_TRANSFORMATION_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_TRANSFORMATION,GstGLTransformationClass))
typedef struct _GstGLTransformation GstGLTransformation;
typedef struct _GstGLTransformationClass GstGLTransformationClass;
struct _GstGLTransformation
{
GstGLFilter filter;
GstGLShader *shader;
GLuint vao;
GLuint vbo_indices;
GLuint vertex_buffer;
GLint attr_position;
GLint attr_texture;
GstGLMemory *in_tex;
GstGLMemory *out_tex;
gfloat xrotation;
gfloat yrotation;
gfloat zrotation;
gfloat xscale;
gfloat yscale;
gfloat xtranslation;
gfloat ytranslation;
gfloat ztranslation;
gfloat xpivot;
gfloat ypivot;
gfloat zpivot;
/* perspective */
gfloat fov;
gfloat aspect;
gfloat znear;
gfloat zfar;
gboolean ortho;
graphene_matrix_t model_matrix;
graphene_matrix_t view_matrix;
graphene_matrix_t projection_matrix;
graphene_matrix_t inv_model_matrix;
graphene_matrix_t inv_view_matrix;
graphene_matrix_t inv_projection_matrix;
graphene_matrix_t mvp_matrix;
graphene_vec3_t camera_position;
gboolean downstream_supports_affine_meta;
gboolean caps_change;
};
struct _GstGLTransformationClass
{
GstGLFilterClass filter_class;
};
GType gst_gl_transformation_get_type (void);
G_END_DECLS
#endif /* _GST_GL_TRANSFORMATION_H_ */