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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5ab3a38973
Heavily based on GstGLBaseBuffer that is a subclass of GstGLBaseMemory. Provides GPU and CPU accessible GL buffer objects by GL handle or by sysmem data pointer.
119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.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_BUFFER_H_
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#define _GST_GL_BUFFER_H_
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#include <gst/gst.h>
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#include <gst/gstallocator.h>
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#include <gst/gstmemory.h>
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#include <gst/gl/gstglbasememory.h>
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G_BEGIN_DECLS
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#define GST_TYPE_GL_BUFFER_ALLOCATOR (gst_gl_buffer_allocator_get_type())
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GType gst_gl_buffer_allocator_get_type(void);
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#define GST_IS_GL_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GL_ALLOCATOR))
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#define GST_IS_GL_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GL_BUFFER_ALLOCATOR))
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#define GST_GL_BUFFER_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocatorClass))
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#define GST_GL_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocator))
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#define GST_GL_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GL_BUFFER_ALLOCATOR, GstGLBufferAllocatorClass))
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#define GST_GL_BUFFER_ALLOCATOR_CAST(obj) ((GstGLBufferAllocator *)(obj))
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typedef enum
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{
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GST_GL_BUFFER_FLAG_NEED_DOWNLOAD = (GST_MEMORY_FLAG_LAST << 0),
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GST_GL_BUFFER_FLAG_NEED_UPLOAD = (GST_MEMORY_FLAG_LAST << 1)
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} GstGLBufferFlags;
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/**
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* GST_MAP_GL:
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*
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* Flag indicating that we should map the GL object instead of to system memory.
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*
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* Combining #GST_MAP_GL with #GST_MAP_WRITE has the same semantics as though
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* you are writing to OpenGL. Conversely, combining #GST_MAP_GL with
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* #GST_MAP_READ has the same semantics as though you are reading from OpenGL.
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*/
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#define GST_MAP_GL (GST_MAP_FLAG_LAST << 1)
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/**
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* GstGLBuffer:
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* @mem: the parent object
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* @context: the #GstGLContext to use for GL operations
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* @id: the buffer id for this memory
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* @target: the GL target of this texture for binding purposes
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*
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* Represents information about a GL buffer
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*/
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struct _GstGLBuffer
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{
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GstGLBaseMemory mem;
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guint id;
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guint target; /* XXX: put this in the allocator? */
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guint usage_hints; /* XXX: put this in the allocator? */
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};
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/**
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* GstGLBufferAllocator
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*
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* Opaque #GstGLAllocator struct
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*/
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struct _GstGLBufferAllocator
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{
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GstGLBaseMemoryAllocator parent;
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};
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/**
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* GstGLBufferAllocatorClass:
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*
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* The #GstGLBufferAllocatorClass only contains private data
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*/
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struct _GstGLBufferAllocatorClass
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{
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GstGLBaseMemoryAllocatorClass parent_class;
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};
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#define GST_CAPS_FEATURE_MEMORY_GL_BUFFER "memory:GLBuffer"
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/**
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* GST_GL_BUFFER_ALLOCATOR_NAME:
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*
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* The name of the GL buffer allocator
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*/
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#define GST_GL_BUFFER_ALLOCATOR_NAME "GLBuffer"
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void gst_gl_buffer_init_once (void);
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gboolean gst_is_gl_buffer (GstMemory * mem);
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GstGLBuffer * gst_gl_buffer_alloc (GstGLContext * context,
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guint gl_target,
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guint gl_usage,
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GstAllocationParams * params,
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gsize maxsize);
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G_END_DECLS
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#endif /* _GST_GL_BUFFER_H_ */
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