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/* GStreamer dmabuf allocator
* Copyright (C) 2013 Linaro SA
* Author: Benjamin Gaignard <benjamin.gaignard@linaro.org> for Linaro.
*
* 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 mordetails.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstfdmemory.h"
#include "gstdmabuf.h"
/**
* SECTION:gstdmabuf
* @short_description: Memory wrapper for Linux dmabuf memory
* @see_also: #GstMemory
*
* Since: 1.2
*/
#ifdef HAVE_MMAP
#include <sys/mman.h>
#include <unistd.h>
#endif
GST_DEBUG_CATEGORY_STATIC (dmabuf_debug);
#define GST_CAT_DEFAULT dmabuf_debug
typedef struct
{
GstFdAllocator parent;
} GstDmaBufAllocator;
typedef struct
{
GstFdAllocatorClass parent_class;
} GstDmaBufAllocatorClass;
GType dmabuf_mem_allocator_get_type (void);
G_DEFINE_TYPE (GstDmaBufAllocator, dmabuf_mem_allocator, GST_TYPE_FD_ALLOCATOR);
#define GST_TYPE_DMABUF_ALLOCATOR (dmabuf_mem_allocator_get_type())
#define GST_IS_DMABUF_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_DMABUF_ALLOCATOR))
static void
dmabuf_mem_allocator_class_init (GstDmaBufAllocatorClass * klass)
{
}
static void
dmabuf_mem_allocator_init (GstDmaBufAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_ALLOCATOR_DMABUF;
}
/**
* gst_dmabuf_allocator_new:
*
* Return a new dmabuf allocator.
*
* Returns: (transfer full): a new dmabuf allocator, or NULL if the allocator
* isn't available. Use gst_object_unref() to release the allocator after
* usage
*
* Since: 1.2
*/
GstAllocator *
gst_dmabuf_allocator_new (void)
{
GST_DEBUG_CATEGORY_INIT (dmabuf_debug, "dmabuf", 0, "dmabuf memory");
return g_object_new (GST_TYPE_DMABUF_ALLOCATOR, NULL);
}
/**
* gst_dmabuf_allocator_alloc:
* @allocator: allocator to be used for this memory
* @fd: dmabuf file descriptor
* @size: memory size
*
* Return a %GstMemory that wraps a dmabuf file descriptor.
*
* Returns: (transfer full): a GstMemory based on @allocator.
* When the buffer will be released dmabuf allocator will close the @fd.
* The memory is only mmapped on gst_buffer_mmap() request.
*
* Since: 1.2
*/
GstMemory *
gst_dmabuf_allocator_alloc (GstAllocator * allocator, gint fd, gsize size)
{
g_return_val_if_fail (GST_IS_DMABUF_ALLOCATOR (allocator), NULL);
return gst_fd_allocator_alloc (allocator, fd, size, GST_FD_MEMORY_FLAG_NONE);
}
/**
* gst_dmabuf_memory_get_fd:
* @mem: the memory to get the file descriptor
*
* Return the file descriptor associated with @mem.
*
* Returns: the file descriptor associated with the memory, or -1. The file
* descriptor is still owned by the GstMemory. Use dup to take a copy
* if you intend to use it beyond the lifetime of this GstMemory.
*
* Since: 1.2
*/
gint
gst_dmabuf_memory_get_fd (GstMemory * mem)
{
g_return_val_if_fail (gst_is_dmabuf_memory (mem), -1);
return gst_fd_memory_get_fd (mem);
}
/**
* gst_is_dmabuf_memory:
* @mem: the memory to be check
*
* Check if @mem is dmabuf memory.
*
* Returns: %TRUE if @mem is dmabuf memory, otherwise %FALSE
*
* Since: 1.2
*/
gboolean
gst_is_dmabuf_memory (GstMemory * mem)
{
return gst_memory_is_type (mem, GST_ALLOCATOR_DMABUF);
}
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