1 /* 2 * GStreamer 3 * Copyright (C) 2007 David Schleef <ds@schleef.org> 4 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com> 5 * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public 18 * License along with this library; if not, write to the 19 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef _GST_GL_FILTER_H_ 24 #define _GST_GL_FILTER_H_ 25 26 #include <gst/gst.h> 27 #include <gst/video/video.h> 28 29 #include <gst/gl/gl.h> 30 31 G_BEGIN_DECLS 32 33 GST_GL_API 34 GType gst_gl_filter_get_type(void); 35 #define GST_TYPE_GL_FILTER (gst_gl_filter_get_type()) 36 #define GST_GL_FILTER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_FILTER,GstGLFilter)) 37 #define GST_IS_GL_FILTER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_FILTER)) 38 #define GST_GL_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_GL_FILTER,GstGLFilterClass)) 39 #define GST_IS_GL_FILTER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_GL_FILTER)) 40 #define GST_GL_FILTER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_GL_FILTER,GstGLFilterClass)) 41 42 /** 43 * GstGLFilterRenderFunc: 44 * @filter: the #GstGLFilter 45 * @in_tex: the input #GstGLMemory to render 46 * @user_data: user data 47 * 48 * Returns: whether the render succeeded 49 * 50 * Since: 1.10 51 */ 52 typedef gboolean (*GstGLFilterRenderFunc) (GstGLFilter * filter, GstGLMemory * in_tex, gpointer user_data); 53 54 /** 55 * GstGLFilter: 56 * @in_info: the video info for input buffers 57 * @out_info: the video info for output buffers 58 * @in_texture_target: The texture target of the input buffers (usually 2D) 59 * @out_texture_target: The texture target of the output buffers (usually 2D) 60 * @out_caps: the output #GstCaps 61 * @fbo: #GstGLFramebuffer object used for transformations (only for subclass usage) 62 */ 63 struct _GstGLFilter 64 { 65 GstGLBaseFilter parent; 66 67 /*< public >*/ 68 GstVideoInfo in_info; 69 GstVideoInfo out_info; 70 GstGLTextureTarget in_texture_target; 71 GstGLTextureTarget out_texture_target; 72 73 GstCaps *out_caps; 74 75 /* protected */ 76 GstGLFramebuffer *fbo; 77 78 /*< private >*/ 79 gboolean gl_result; 80 GstBuffer *inbuf; 81 GstBuffer *outbuf; 82 83 GstGLShader *default_shader; 84 gboolean valid_attributes; 85 86 guint vao; 87 guint vbo_indices; 88 guint vertex_buffer; 89 gint draw_attr_position_loc; 90 gint draw_attr_texture_loc; 91 92 gpointer _padding[GST_PADDING]; 93 }; 94 95 /** 96 * GstGLFilterClass: 97 * @set_caps: mirror from #GstBaseTransform 98 * @filter: perform operations on the input and output buffers. In general, 99 * you should avoid using this method if at all possible. One valid 100 * use-case for using this is keeping previous buffers for future calculations. 101 * Note: If @filter exists, then @filter_texture is not run 102 * @filter_texture: given @in_tex, transform it into @out_tex. Not used 103 * if @filter exists 104 * @init_fbo: perform initialization when the Framebuffer object is created 105 * @transform_internal_caps: Perform sub-class specific modifications of the 106 * caps to be processed between upload on input and before download for output. 107 */ 108 struct _GstGLFilterClass 109 { 110 GstGLBaseFilterClass parent_class; 111 112 /*< public >*/ 113 gboolean (*set_caps) (GstGLFilter* filter, GstCaps* incaps, GstCaps* outcaps); 114 gboolean (*filter) (GstGLFilter *filter, GstBuffer *inbuf, GstBuffer *outbuf); 115 gboolean (*filter_texture) (GstGLFilter *filter, GstGLMemory *input, GstGLMemory *output); 116 gboolean (*init_fbo) (GstGLFilter *filter); 117 118 GstCaps *(*transform_internal_caps) (GstGLFilter *filter, 119 GstPadDirection direction, GstCaps * caps, GstCaps * filter_caps); 120 121 /*< private >*/ 122 gpointer _padding[GST_PADDING]; 123 }; 124 125 GST_GL_API 126 void gst_gl_filter_add_rgba_pad_templates (GstGLFilterClass *klass); 127 128 GST_GL_API 129 gboolean gst_gl_filter_filter_texture (GstGLFilter * filter, GstBuffer * input, 130 GstBuffer * output); 131 132 GST_GL_API 133 gboolean gst_gl_filter_render_to_target (GstGLFilter *filter, 134 GstGLMemory * input, 135 GstGLMemory * output, 136 GstGLFilterRenderFunc func, 137 gpointer data); 138 139 GST_GL_API 140 void gst_gl_filter_draw_fullscreen_quad (GstGLFilter *filter); 141 GST_GL_API 142 void gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter, 143 GstGLMemory * input, 144 GstGLMemory * output, 145 GstGLShader *shader); 146 147 G_END_DECLS 148 149 #endif /* _GST_GL_FILTER_H_ */ 150