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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* GStreamer
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* Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
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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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/**
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* SECTION:gstphysmemoryallocator
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* @title: GstPhysMemoryAllocator
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* @short_description: Interface for allocators that pass around physical memory addresses
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* @see_also: #GstMemory
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*
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* Since: 1.14
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstphysmemory.h"
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G_DEFINE_INTERFACE (GstPhysMemoryAllocator, gst_phys_memory_allocator,
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GST_TYPE_ALLOCATOR);
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static void
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gst_phys_memory_allocator_default_init (GstPhysMemoryAllocatorInterface * iface)
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{
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}
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/**
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* gst_is_phys_memory:
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* @mem: a #GstMemory
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*
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* Returns: whether the memory at @mem is backed by physical memory
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*
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* Since: 1.14
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*/
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gboolean
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gst_is_phys_memory (GstMemory * mem)
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{
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return mem != NULL && mem->allocator != NULL
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&& g_type_is_a (G_OBJECT_TYPE (mem->allocator),
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GST_TYPE_PHYS_MEMORY_ALLOCATOR);
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}
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/**
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* gst_phys_memory_get_phys_addr:
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* @mem: a #GstMemory
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*
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* Returns: Physical memory address that is backing @mem, or 0 if none
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*
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* Since: 1.14
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*/
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guintptr
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gst_phys_memory_get_phys_addr (GstMemory * mem)
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{
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GstPhysMemoryAllocatorInterface *iface;
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g_return_val_if_fail (gst_is_phys_memory (mem), 0);
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iface = GST_PHYS_MEMORY_ALLOCATOR_GET_IFACE (mem->allocator);
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g_return_val_if_fail (iface->get_phys_addr != NULL, 0);
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return iface->get_phys_addr ((GstPhysMemoryAllocator *) mem->allocator, mem);
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}
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