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1aec533d21
This can be used in a generic way as common interface by all platforms that, in one way or another, pass around physical memory addresses. This is used by the gl lib and seems useful enough, so might just as well move it next to the other allocators. https://bugzilla.gnome.org/show_bug.cgi?id=779067
69 lines
1.9 KiB
C
69 lines
1.9 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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#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_INTERFACE (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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