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