mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 19:21:06 +00:00
c37b1e8c56
This should allos for cleaner code when implement such allocator. https://bugzilla.gnome.org/show_bug.cgi?id=768794
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* 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
|
|
|
|
G_DEFINE_TYPE (GstDmaBufAllocator, gst_dmabuf_allocator, GST_TYPE_FD_ALLOCATOR);
|
|
|
|
static void
|
|
gst_dmabuf_allocator_class_init (GstDmaBufAllocatorClass * klass)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gst_dmabuf_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)
|
|
{
|
|
g_return_val_if_fail (mem != NULL, FALSE);
|
|
|
|
return GST_IS_DMABUF_ALLOCATOR (mem->allocator);
|
|
}
|