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gstreamer/gst-libs/gst/gl/gstglmemory.h
Alessandro Decina 5f547c5600 gl: initial support for texture targets other than GL_TEXTURE_2D 
Make GstGLMemory hold the texture target (tex_target) the texture it represents
(tex_id) is bound to. Modify gst_gl_memory_wrapped_texture and
gst_gl_download_perform_with_data to take the texture target as an argument.

This change is needed to support wrapping textures created outside libgstgl,
which might be bound to a target other than GL_TEXTURE_2D. For example on OSX
textures coming from VideoToolbox have target GL_TEXTURE_RECTANGLE.

With this change we still keep (and sometimes imply) GL_TEXTURE_2D as the
target of textures created with libgstgl.

API: modify GstGLMemory
API: modify gst_gl_memory_wrapped_texture
API: gst_gl_download_perform_with_data
2015-01-30 00:34:08 +11:00

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/*
* 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;
guint tex_id;
guint tex_target;
GstVideoGLTextureType tex_type;
GstVideoInfo info;
GstVideoAlignment valign;
guint plane;
gfloat tex_scaling[2];
/* <private> */
gpointer data;
gboolean data_wrapped;
gboolean texture_wrapped;
GDestroyNotify notify;
gpointer user_data;
guint pbo;
guint unpack_length;
guint tex_width;
guint transfer_pbo;
GstMapFlags map_flags;
GMutex lock;
};
#define GST_CAPS_FEATURE_MEMORY_GL_MEMORY "memory:GLMemory"
/**
* 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);
gboolean gst_is_gl_memory (GstMemory * mem);
GstMemory * gst_gl_memory_alloc (GstGLContext * context, GstVideoInfo * info, guint plane,
GstVideoAlignment *valign);
GstGLMemory * gst_gl_memory_wrapped (GstGLContext * context, GstVideoInfo * info, guint plane,
GstVideoAlignment *valign, gpointer data,
gpointer user_data, GDestroyNotify notify);
GstGLMemory * gst_gl_memory_wrapped_texture (GstGLContext * context, guint texture_id, guint texture_target,
GstVideoInfo * info, guint plane, GstVideoAlignment *valign,
gpointer user_data, GDestroyNotify notify);
gboolean gst_gl_memory_copy_into_texture (GstGLMemory *gl_mem, guint tex_id,
GstVideoGLTextureType tex_type,
gint width, gint height, gint stride,
gboolean respecify);
gboolean gst_gl_memory_setup_buffer (GstGLContext * context, GstVideoInfo * info, GstVideoAlignment *valign,
GstBuffer * buffer);
gboolean gst_gl_memory_setup_wrapped (GstGLContext * context, GstVideoInfo * info, GstVideoAlignment *valign,
gpointer data[GST_VIDEO_MAX_PLANES],
GstGLMemory *textures[GST_VIDEO_MAX_PLANES]);
gint gst_gl_memory_get_texture_width (GstGLMemory * gl_mem);
gint gst_gl_memory_get_texture_height (GstGLMemory * gl_mem);
GstVideoGLTextureType gst_gl_texture_type_from_format (GstGLContext *context, GstVideoFormat v_format, guint plane);
void gst_gl_memory_download_transfer (GstGLMemory * gl_mem);
/**
* 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_ */
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