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140 lines
5.3 KiB
C
140 lines
5.3 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/base/gstbasetransform.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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typedef struct _GstGLFilter GstGLFilter;
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typedef struct _GstGLFilterClass 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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GstBaseTransform base_transform;
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GstBufferPool *pool;
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GstGLDisplay *display;
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GstVideoInfo in_info;
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GstVideoInfo out_info;
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GLuint fbo;
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GLuint depthbuffer;
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GstGLUpload *upload;
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GstGLDownload *download;
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/* <private> */
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GLuint in_tex_id;
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GLuint out_tex_id;
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GstGLShader *default_shader;
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GstGLContext *context;
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GstGLContext *other_context;
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#if GST_GL_HAVE_GLES2
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GLint draw_attr_position_loc;
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GLint draw_attr_texture_loc;
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#endif
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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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* @onInitFBO: perform initialization when the Framebuffer object is created
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* @onStart: called when element activates see also #GstBaseTransform
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* @onStop: called when the element deactivates e also #GstBaseTransform
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* @onReset: called on inizialation and after @onStop
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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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*/
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struct _GstGLFilterClass
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{
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GstBaseTransformClass base_transform_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, guint in_tex, guint out_tex);
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gboolean (*onInitFBO) (GstGLFilter *filter);
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void (*onStart) (GstGLFilter *filter);
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void (*onStop) (GstGLFilter *filter);
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void (*onReset) (GstGLFilter *filter);
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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, gboolean resize, GLuint input,
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GLuint target, GLCB func, gpointer data);
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void gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter, gboolean resize,
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GLuint input, GLuint target, GstGLShader *shader);
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void gst_gl_filter_draw_texture (GstGLFilter *filter, GLuint texture, guint width, guint height);
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G_END_DECLS
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#endif /* _GST_GL_FILTER_H_ */
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