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e6cb520036
Add some flags to the GstFdMemory to control how memory is mapped and unmapped.
72 lines
2.2 KiB
C
72 lines
2.2 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_MEMORY_H__
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#define __GST_FD_MEMORY_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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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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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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* GstFdMemory
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* @flags: #GstFdMemoryFlags
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* @fd: the file descriptor associated this memory
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* @data: mmapped address
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* @mmapping_flags: mmapping flags
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* @mmap_count: mmapping counter
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* @lock: a mutex to make mmapping thread safe
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*/
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typedef struct
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{
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GstMemory mem;
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GstFdMemoryFlags flags;
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gint fd;
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gpointer data;
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gint mmapping_flags;
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gint mmap_count;
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GMutex lock;
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} GstFdMemory;
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void __gst_fd_memory_class_init_allocator (GstAllocatorClass * allocator);
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void __gst_fd_memory_init_allocator (GstAllocator * allocator, const gchar *type);
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GstMemory * __gst_fd_memory_new (GstAllocator * allocator, gint fd, gsize size,
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GstFdMemoryFlags flags);
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G_END_DECLS
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#endif /* __GST_FD_MEMORY_H__ */
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