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7c7f84c603
Add a class to store and manage the OpenGL texture, vertex buffer and GstVideoOverlayRectangle. Transforms overlay coordinate space to vertex buffer space with aspect ratios in mind. = Example Pipelines = Simple pipeline gst-launch-1.0 videotestsrc ! \ textoverlay text="Hello World" font-desc="sans bold 30" ! \ glimagesink Display 3 static overlays at different positions gst-launch-1.0 videotestsrc ! \ textoverlay text="text1" valignment="top" font-desc="sans bold 30" ! \ textoverlay text="text2" halignment="right" font-desc="sans bold 30" ! \ textoverlay text="text3" halignment="left" font-desc="sans bold 30" ! \ glimagesink Display subtitle file over testsrc gst-launch-1.0 videotestsrc ! \ textoverlay name=foo filesrc location=foo.srt ! subparse ! queue ! foo. foo. ! \ glimagesink https://bugzilla.gnome.org/show_bug.cgi?id=745107
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
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* GStreamer
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* Copyright (C) 2015 Lubosz Sarnecki <lubosz.sarnecki@collabora.co.uk>
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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_COMPOSITION_OVERLAY_H__
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#define __GST_GL_COMPOSITION_OVERLAY_H__
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#include <gst/video/video.h>
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#include <gst/gl/gstgl_fwd.h>
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#define GST_TYPE_GL_COMPOSITION_OVERLAY (gst_gl_composition_overlay_get_type())
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#define GST_GL_COMPOSITION_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_COMPOSITION_OVERLAY,GstGLCompositionOverlay))
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#define GST_GL_COMPOSITION_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_COMPOSITION_OVERLAY,GstGLCompositionOverlayClass))
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#define GST_IS_GL_COMPOSITION_OVERLAY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_COMPOSITION_OVERLAY))
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#define GST_IS_GL_COMPOSITION_OVERLAY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_COMPOSITION_OVERLAY))
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#define GST_GL_COMPOSITION_OVERLAY_CAST(obj) ((GstGLCompositionOverlay*)(obj))
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G_BEGIN_DECLS
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GType gst_gl_composition_overlay_get_type (void);
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/**
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* GstGLCompositionOverlay
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*
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* Opaque #GstGLCompositionOverlay object
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*/
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struct _GstGLCompositionOverlay
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{
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/*< private >*/
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GstObject parent;
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GstGLContext *context;
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GLuint vao;
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GLuint index_buffer;
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GLuint position_buffer;
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GLuint texcoord_buffer;
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GLint position_attrib;
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GLint texcoord_attrib;
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GLfloat positions[16];
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GLuint texture_id;
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GstGLMemory *gl_memory;
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GstVideoOverlayRectangle *rectangle;
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};
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/**
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* GstGLCompositionOverlayClass:
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*
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*/
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struct _GstGLCompositionOverlayClass
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{
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GstObjectClass object_class;
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};
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GstGLCompositionOverlay *gst_gl_composition_overlay_new (GstGLContext * context,
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GstVideoOverlayRectangle * rectangle, GLint position_attrib,
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GLint texcoord_attrib);
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void gst_gl_composition_overlay_upload (GstGLCompositionOverlay * overlay,
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GstBuffer * buf, guint window_width, guint window_height);
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void gst_gl_composition_overlay_draw (GstGLCompositionOverlay * overlay,
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GstGLShader * shader);
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G_END_DECLS
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#endif /* __GST_GL_COMPOSITION_OVERLAY_H__ */
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