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/*
* GStreamer
* Copyright (C) 2007 David Schleef <ds@schleef.org>
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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_FILTER_H_
#define _GST_GL_FILTER_H_
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
G_BEGIN_DECLS
GType gst_gl_filter_get_type(void);
#define GST_TYPE_GL_FILTER (gst_gl_filter_get_type())
#define GST_GL_FILTER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_FILTER,GstGLFilter))
#define GST_IS_GL_FILTER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_FILTER))
#define GST_GL_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_FILTER,GstGLFilterClass))
#define GST_IS_GL_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_FILTER))
#define GST_GL_FILTER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_FILTER,GstGLFilterClass))
/**
* GstGLFilter:
* @base_transform: parent #GstBaseTransform
* @pool: the currently configured #GstBufferPool
* @display: the currently configured #GstGLDisplay
* @in_info: the video info for input buffers
* @out_info: the video info for output buffers
* @fbo: GL Framebuffer object used for transformations
* @depthbuffer: GL renderbuffer attached to @fbo
* @upload: the object used for uploading data, if needed
* @download: the object used for downloading data, if needed
*
* #GstGLFilter is a base class that provides the logic of getting the GL context
* from downstream and automatic upload/download for non-#GstGLMemory
* #GstBuffer<!-- -->s.
*/
struct _GstGLFilter
{
GstGLBaseFilter parent;
GstVideoInfo in_info;
GstVideoInfo out_info;
GstCaps *out_caps;
/* <private> */
GLuint fbo;
GLuint depthbuffer;
GLuint in_tex_id;
GLuint out_tex_id;
GstGLShader *default_shader;
GLuint vao;
GLuint vbo_indices;
GLuint vertex_buffer;
GLint draw_attr_position_loc;
GLint draw_attr_texture_loc;
};
/**
* GstGLFilterClass:
* @base_transform_class: parent class
* @set_caps: mirror from #GstBaseTransform
* @filter: perform operations on the input and output buffers. In general,
* you should avoid using this method if at all possible. One valid
* use-case for using this is keeping previous buffers for future calculations.
* Note: If @filter exists, then @filter_texture is not run
* @filter_texture: given @in_tex, transform it into @out_tex. Not used
* if @filter exists
* @init_fbo: perform initialization when the Framebuffer object is created
* @display_init_cb: execute arbitrary gl code on start
* @display_reset_cb: execute arbitrary gl code at stop
* @transform_internal_caps: Perform sub-class specific modifications of the
* caps to be processed between upload on input and before download for output.
*/
struct _GstGLFilterClass
{
GstGLBaseFilterClass parent_class;
gboolean (*set_caps) (GstGLFilter* filter, GstCaps* incaps, GstCaps* outcaps);
gboolean (*filter) (GstGLFilter *filter, GstBuffer *inbuf, GstBuffer *outbuf);
gboolean (*filter_texture) (GstGLFilter *filter, guint in_tex, guint out_tex);
gboolean (*init_fbo) (GstGLFilter *filter);
GstCaps *(*transform_internal_caps) (GstGLFilter *filter,
GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps);
/* useful to init and cleanup custom gl resources */
void (*display_init_cb) (GstGLFilter *filter);
void (*display_reset_cb) (GstGLFilter *filter);
};
gboolean gst_gl_filter_filter_texture (GstGLFilter * filter, GstBuffer * inbuf,
GstBuffer * outbuf);
void gst_gl_filter_render_to_target (GstGLFilter *filter, gboolean resize, GLuint input,
GLuint target, GLCB func, gpointer data);
void gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter, gboolean resize,
GLuint input, GLuint target, GstGLShader *shader);
void gst_gl_filter_draw_texture (GstGLFilter *filter, GLuint texture, guint width, guint height);
G_END_DECLS
#endif /* _GST_GL_FILTER_H_ */
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