gstreamer/gst-libs/gst/gl/gstglmemory.h
2014-04-02 23:05:47 +11:00

176 lines
4.9 KiB
C

/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GST_GL_MEMORY_H_
#define _GST_GL_MEMORY_H_
#include <gst/gst.h>
#include <gst/gstallocator.h>
#include <gst/gstmemory.h>
#include <gst/video/video.h>
#include <gst/gl/gl.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_ALLOCATOR (gst_gl_allocator_get_type())
GType gst_gl_allocator_get_type(void);
#define GST_IS_GL_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GL_ALLOCATOR))
#define GST_IS_GL_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GL_ALLOCATOR))
#define GST_GL_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GL_ALLOCATOR, GstGLAllocatorClass))
#define GST_GL_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GL_ALLOCATOR, GstGLAllocator))
#define GST_GL_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GL_ALLOCATOR, GstGLAllocatorClass))
#define GST_GL_ALLOCATOR_CAST(obj) ((GstGLAllocator *)(obj))
/**
* GstGLMemoryFlags:
*
* Flags indicating the current state of a #GstGLMemory
*/
typedef enum
{
GST_GL_MEMORY_FLAG_DOWNLOAD_INITTED = (GST_MEMORY_FLAG_LAST << 0),
GST_GL_MEMORY_FLAG_UPLOAD_INITTED = (GST_MEMORY_FLAG_LAST << 1),
GST_GL_MEMORY_FLAG_NEED_DOWNLOAD = (GST_MEMORY_FLAG_LAST << 2),
GST_GL_MEMORY_FLAG_NEED_UPLOAD = (GST_MEMORY_FLAG_LAST << 3)
} GstGLMemoryFlags;
/**
* GST_MAP_GL:
*
* Flag indicating that we should map the GL object instead of to system memory.
*
* Combining #GST_MAP_GL with #GST_MAP_WRITE has the same semantics as though
* you are writing to OpenGL. Conversely, combining #GST_MAP_GL with
* #GST_MAP_READ has the same semantics as though you are reading from OpenGL.
*/
#define GST_MAP_GL GST_MAP_FLAG_LAST << 1
/**
* GstGLMemory:
* @mem: the parent object
* @context: the #GstGLContext to use for GL operations
* @tex_id: the texture id for this memory
* @v_format: the video format of this texture
* @gl_format: the format of the texture
* @width: width of the texture
* @height: height of the texture
* @download: the object used to download this texture into @v_format
* @upload: the object used to upload this texture from @v_format
*
* Represents information about a GL texture
*/
struct _GstGLMemory
{
GstMemory mem;
GstGLContext *context;
GLuint tex_id;
GstVideoInfo v_info;
GLenum gl_format;
GstGLDownload *download;
GstGLUpload *upload;
/* <private> */
GstMapFlags map_flags;
gpointer data;
gboolean wrapped;
GDestroyNotify notify;
gpointer user_data;
};
/**
* GST_GL_MEMORY_ALLOCATOR:
*
* The name of the GL memore allocator
*/
#define GST_GL_MEMORY_ALLOCATOR "GLMemory"
/**
* GST_GL_MEMORY_FLAGS:
* @mem: a #GstGLMemory
*
* Get the currently set flags on @mem
*/
#define GST_GL_MEMORY_FLAGS(mem) GST_MEMORY_FLAGS(mem)
/**
* GST_GL_MEMORY_FLAG_IS_SET:
* @mem: a #GstGLMemory
* @flag: a flag
*
* Whether @flag is set on @mem
*/
#define GST_GL_MEMORY_FLAG_IS_SET(mem,flag) GST_MEMORY_FLAG_IS_SET(mem,flag)
/**
* GST_GL_MEMORY_FLAG_SET:
* @mem: a #GstGLMemory
* @flag: a flag
*
* Set @flag on @mem
*/
#define GST_GL_MEMORY_FLAG_SET(mem,flag) GST_MINI_OBJECT_FLAG_SET(mem,flag)
/**
* GST_GL_MEMORY_FLAG_UNSET:
* @mem: a #GstGLMemory
* @flag: a flag
*
* Unset @flag on @mem
*/
#define GST_GL_MEMORY_FLAG_UNSET(mem,flag) GST_MEMORY_FLAG_UNSET(mem,flag)
void gst_gl_memory_init (void);
GstMemory * gst_gl_memory_alloc (GstGLContext * context, GstVideoInfo * info);
GstGLMemory * gst_gl_memory_wrapped (GstGLContext * context, GstVideoInfo * info, gpointer data,
gpointer user_data, GDestroyNotify notify);
gboolean gst_is_gl_memory (GstMemory * mem);
gboolean gst_gl_memory_copy_into_texture (GstGLMemory *gl_mem, guint tex_id);
/**
* GstGLAllocator
*
* Opaque #GstGLAllocator struct
*/
struct _GstGLAllocator
{
GstAllocator parent;
};
/**
* GstGLAllocatorClass:
*
* The #GstGLAllocatorClass only contains private data
*/
struct _GstGLAllocatorClass
{
GstAllocatorClass parent_class;
};
G_END_DECLS
#endif /* _GST_GL_MEMORY_H_ */