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3205e90e83
Make a base class that can help with allocating fd-backed memory. Make dmabuf extend from the base class. We can now make methods to check if memory has an fd and get the fd for all the different types of fd-backed memory.
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/* GStreamer fd memory
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* Copyright (C) 2013 Linaro SA
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* Author: Benjamin Gaignard <benjamin.gaignard@linaro.org> for Linaro.
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_FD_ALLOCATOR_H__
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#define __GST_FD_ALLOCATOR_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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typedef struct _GstFdAllocator GstFdAllocator;
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typedef struct _GstFdAllocatorClass GstFdAllocatorClass;
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#define GST_TYPE_FD_ALLOCATOR (gst_fd_allocator_get_type())
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#define GST_IS_FD_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_FD_ALLOCATOR))
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#define GST_IS_FD_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_FD_ALLOCATOR))
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#define GST_FD_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_FD_ALLOCATOR, GstFdAllocatorClass))
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#define GST_FD_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_FD_ALLOCATOR, GstFdAllocator))
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#define GST_FD_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_FD_ALLOCATOR, GstFdAllocatorClass))
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#define GST_FD_ALLOCATOR_CAST(obj) ((GstFdAllocator *)(obj))
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/**
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* @GST_FD_MEMORY_FLAG_NONE: no flag
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* @GST_FD_MEMORY_FLAG_KEEP_MAPPED: once the memory is mapped,
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* keep it mapped until the memory is destroyed.
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* @GST_FD_MEMORY_FLAG_MAP_PRIVATE: do a private mapping instead of
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* the default shared mapping.
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*
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* Various flags to control the operation of the fd backed memory.
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*
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* Since: 1.6
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*/
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typedef enum {
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GST_FD_MEMORY_FLAG_NONE = 0,
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GST_FD_MEMORY_FLAG_KEEP_MAPPED = (1 << 0),
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GST_FD_MEMORY_FLAG_MAP_PRIVATE = (1 << 1),
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} GstFdMemoryFlags;
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/**
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* GstFdAllocator:
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*
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* Base class for allocators with fd-backed memory
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*
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* Since: 1.6
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*/
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struct _GstFdAllocator
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{
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GstAllocator parent;
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};
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struct _GstFdAllocatorClass
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{
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GstAllocatorClass parent_class;
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/*< protected >*/
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GstMemory * (*alloc) (GstFdAllocator *alloc, gint fd,
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gsize size, GstFdMemoryFlags flags);
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};
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GType gst_fd_allocator_get_type (void);
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gboolean gst_is_fd_memory (GstMemory *mem);
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gint gst_fd_memory_get_fd (GstMemory *mem);
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G_END_DECLS
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#endif /* __GST_FD_ALLOCATOR_H__ */
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