gstreamer/gst-libs/gst/gl/gstglbasebuffer.h
Matthew Waters 900bcea9de glmemory: implement on top of glbasebuffer
Provides convenient access to PBO usage.

Currently texture updates are coupled tightly to data transfers.
2017-12-09 19:32:04 +00:00

164 lines
6 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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_BASE_BUFFER_H_
#define _GST_GL_BASE_BUFFER_H_
#include <gst/gst.h>
#include <gst/gstallocator.h>
#include <gst/gstmemory.h>
#include <gst/gl/gstgl_fwd.h>
G_BEGIN_DECLS
#define GST_TYPE_GL_BASE_BUFFER_ALLOCATOR (gst_gl_base_buffer_allocator_get_type())
GType gst_gl_base_buffer_allocator_get_type(void);
#define GST_IS_GL_BASE_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GL_ALLOCATOR))
#define GST_IS_GL_BASE_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GL_BASE_BUFFER_ALLOCATOR))
#define GST_GL_BASE_BUFFER_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_GL_BASE_BUFFER_ALLOCATOR, GstGLBaseBufferAllocatorClass))
#define GST_GL_BASE_BUFFER_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GL_BASE_BUFFER_ALLOCATOR, GstGLBaseBufferAllocator))
#define GST_GL_BASE_BUFFER_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GL_BASE_BUFFER_ALLOCATOR, GstGLBaseBufferAllocatorClass))
#define GST_GL_BASE_BUFFER_ALLOCATOR_CAST(obj) ((GstGLBaseBufferAllocator *)(obj))
GQuark gst_gl_base_buffer_error_quark (void);
#define GST_GL_BASE_BUFFER_ERROR (gst_gl_base_buffer_error_quark ())
typedef enum
{
GST_GL_BASE_BUFFER_ERROR_FAILED,
GST_GL_BASE_BUFFER_ERROR_OLD_LIBS,
GST_GL_BASE_BUFFER_ERROR_RESOURCE_UNAVAILABLE,
} GstGLBufferError;
typedef enum
{
GST_GL_BASE_BUFFER_FLAG_NEED_DOWNLOAD = (GST_MEMORY_FLAG_LAST << 0),
GST_GL_BASE_BUFFER_FLAG_NEED_UPLOAD = (GST_MEMORY_FLAG_LAST << 1)
} GstGLBaseBufferFlags;
/**
* 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)
/**
* GstGLBaseBuffer:
* @mem: the parent object
* @context: the #GstGLContext to use for GL operations
* @id: the buffer id for this memory
* @target: the GL target of this texture for binding purposes
*
* Represents information about a GL buffer
*/
struct _GstGLBaseBuffer
{
GstMemory mem;
GstGLContext *context;
guint id;
guint target;
/* <protected> */
GMutex lock;
GstMapFlags map_flags; /* cumulative map flags */
gint map_count;
gint gl_map_count;
gpointer data;
/* <private> */
gpointer alloc_data;
};
typedef gboolean (*GstGLBaseBufferAllocatorCreateFunction) (GstGLBaseBuffer * buffer, GError ** error);
typedef gpointer (*GstGLBaseBufferAllocatorMapBufferFunction) (GstGLBaseBuffer * buffer, GstMapInfo * info, gsize maxsize);
typedef void (*GstGLBaseBufferAllocatorUnmapBufferFunction) (GstGLBaseBuffer * buffer, GstMapInfo * info);
typedef GstGLBaseBuffer * (*GstGLBaseBufferAllocatorCopyFunction) (GstGLBaseBuffer * buffer, gssize offset, gssize size);
typedef void (*GstGLBaseBufferAllocatorDestroyFunction) (GstGLBaseBuffer * buffer);
/**
* GstGLBaseBufferAllocator
*
* Opaque #GstGLAllocator struct
*/
struct _GstGLBaseBufferAllocator
{
GstAllocator parent;
};
/**
* GstGLBaseBufferAllocatorClass:
*
* The #GstGLBaseBufferAllocatorClass only contains private data
*/
struct _GstGLBaseBufferAllocatorClass
{
GstAllocatorClass parent_class;
GstGLBaseBufferAllocatorCreateFunction create;
GstGLBaseBufferAllocatorMapBufferFunction map_buffer;
GstGLBaseBufferAllocatorUnmapBufferFunction unmap_buffer;
GstGLBaseBufferAllocatorCopyFunction copy;
GstGLBaseBufferAllocatorDestroyFunction destroy;
};
#include <gst/gl/gl.h>
#define GST_CAPS_FEATURE_MEMORY_GL_BUFFER "memory:GLBuffer"
/**
* GST_GL_BASE_BUFFER_ALLOCATOR_NAME:
*
* The name of the GL buffer allocator
*/
#define GST_GL_BASE_BUFFER_ALLOCATOR_NAME "GLBuffer"
void gst_gl_base_buffer_init_once (void);
gboolean gst_is_gl_base_buffer (GstMemory * mem);
void gst_gl_base_buffer_init (GstGLBaseBuffer * mem,
GstAllocator * allocator,
GstMemory * parent,
GstGLContext * context,
GstAllocationParams * params,
gsize maxsize);
GstGLBaseBuffer * gst_gl_base_buffer_alloc_data (GstGLBaseBuffer * gl_mem);
gboolean gst_gl_base_buffer_copy_buffer_sub_data (GstGLBaseBuffer * src,
GstGLBaseBuffer * dest,
gssize offset,
gssize size);
gboolean gst_gl_base_buffer_memcpy (GstGLBaseBuffer * src,
GstGLBaseBuffer * dest,
gssize offset,
gssize size);
G_END_DECLS
#endif /* _GST_GL_BUFFER_H_ */