gstreamer/gst-libs/gst/vulkan/gstvkimagememory.c
Matthew Waters a7c2aa473f vulkan/image: don't rely on weak-ref notifies for views
Weak refs don't quite work here correctly as there is always a race with
taking the lock between find_view() and remove_view().  If find_view()
returns a view that is going to removed by remove_view() then we have an
interesting situation.

In theory, the number and type of views for an image are relatively
constant and should not change one they've been set up which means that
it is actually practical to perform pool-like reference counting here
where the image holds a pool of different views that it can give out
as necessary.
2019-11-28 23:27:21 +00:00

736 lines
20 KiB
C

/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
*
* 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 more details.
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvkimagememory.h"
/**
* SECTION:vkimagememory
* @title: GstVulkanImageMemory
* @short_description: memory subclass for Vulkan image memory
* @see_also: #GstMemory, #GstAllocator
*
* GstVulkanImageMemory is a #GstMemory subclass providing support for the
* mapping of Vulkan device memory.
*/
#define GST_CAT_DEFUALT GST_CAT_VULKAN_IMAGE_MEMORY
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFUALT);
static GstAllocator *_vulkan_image_memory_allocator;
/**
* gst_vulkan_format_from_video_info: (skip)
* @v_info: the #GstVideoInfo
* @plane: the plane
*
* Returns: the VkFormat to use for @v_format and @plane
*
* Since: 1.18
*/
VkFormat
gst_vulkan_format_from_video_info (GstVideoInfo * v_info, guint plane)
{
guint n_plane_components;
switch (GST_VIDEO_INFO_FORMAT (v_info)) {
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_RGBA:
if (GST_VIDEO_INFO_COLORIMETRY (v_info).transfer ==
GST_VIDEO_TRANSFER_SRGB)
return VK_FORMAT_R8G8B8A8_UNORM;
else
return VK_FORMAT_R8G8B8A8_SRGB;
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_BGRA:
if (GST_VIDEO_INFO_COLORIMETRY (v_info).transfer ==
GST_VIDEO_TRANSFER_SRGB)
return VK_FORMAT_B8G8R8A8_UNORM;
else
return VK_FORMAT_B8G8R8A8_SRGB;
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ABGR:
if (GST_VIDEO_INFO_COLORIMETRY (v_info).transfer ==
GST_VIDEO_TRANSFER_SRGB)
n_plane_components = 4;
else
return VK_FORMAT_UNDEFINED;
case GST_VIDEO_FORMAT_AYUV:
n_plane_components = 4;
break;
case GST_VIDEO_FORMAT_RGB:
return VK_FORMAT_R8G8B8_UNORM;
case GST_VIDEO_FORMAT_BGR:
return VK_FORMAT_B8G8R8_UNORM;
break;
case GST_VIDEO_FORMAT_RGB16:
return VK_FORMAT_R5G6B5_UNORM_PACK16;
case GST_VIDEO_FORMAT_BGR16:
return VK_FORMAT_B5G6R5_UNORM_PACK16;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
n_plane_components = 2;
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
n_plane_components = plane == 0 ? 1 : 2;
break;
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
n_plane_components = 1;
break;
default:
n_plane_components = 4;
g_assert_not_reached ();
break;
}
switch (n_plane_components) {
case 4:
return VK_FORMAT_R8G8B8A8_UNORM;
case 2:
return VK_FORMAT_R8G8_UNORM;
case 1:
return VK_FORMAT_R8_UNORM;
default:
g_assert_not_reached ();
return VK_FORMAT_R8G8B8A8_UNORM;
}
}
static gboolean
_create_info_from_args (VkImageCreateInfo * info, VkFormat format, gsize width,
gsize height, VkImageTiling tiling, VkImageUsageFlags usage)
{
/* FIXME: validate these */
/* *INDENT-OFF* */
*info = (VkImageCreateInfo) {
.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
.pNext = NULL,
.flags = 0,
.imageType = VK_IMAGE_TYPE_2D,
.format = format,
.extent = (VkExtent3D) { width, height, 1 },
.mipLevels = 1,
.arrayLayers = 1,
.samples = VK_SAMPLE_COUNT_1_BIT,
.tiling = tiling,
.usage = usage,
.sharingMode = VK_SHARING_MODE_EXCLUSIVE,
.queueFamilyIndexCount = 0,
.pQueueFamilyIndices = NULL,
.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED,
};
/* *INDENT-ON* */
return TRUE;
}
static void
_vk_image_mem_init (GstVulkanImageMemory * mem, GstAllocator * allocator,
GstMemory * parent, GstVulkanDevice * device, VkImageUsageFlags usage,
GstAllocationParams * params, gsize size, gpointer user_data,
GDestroyNotify notify)
{
gsize align = gst_memory_alignment, offset = 0, maxsize = size;
GstMemoryFlags flags = 0;
if (params) {
flags = params->flags;
align |= params->align;
offset = params->prefix;
maxsize += params->prefix + params->padding + align;
}
gst_memory_init (GST_MEMORY_CAST (mem), flags, allocator, parent, maxsize,
align, offset, size);
mem->device = gst_object_ref (device);
mem->barrier.parent.type = GST_VULKAN_BARRIER_TYPE_IMAGE;
mem->barrier.parent.pipeline_stages = VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT;
mem->barrier.parent.access_flags = 0;
mem->barrier.image_layout = VK_IMAGE_LAYOUT_UNDEFINED;
/* *INDENT-OFF* */
mem->barrier.subresource_range = (VkImageSubresourceRange) {
.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT,
.baseMipLevel = 0,
.levelCount = 1,
.baseArrayLayer = 0,
.layerCount = 1,
};
/* *INDENT-ON* */
mem->usage = usage;
mem->wrapped = FALSE;
mem->notify = notify;
mem->user_data = user_data;
g_mutex_init (&mem->lock);
mem->views = g_ptr_array_new ();
mem->outstanding_views = g_ptr_array_new ();
GST_CAT_DEBUG (GST_CAT_VULKAN_IMAGE_MEMORY,
"new Vulkan Image memory:%p size:%" G_GSIZE_FORMAT, mem, maxsize);
}
static GstVulkanImageMemory *
_vk_image_mem_new_alloc (GstAllocator * allocator, GstMemory * parent,
GstVulkanDevice * device, VkFormat format, gsize width, gsize height,
VkImageTiling tiling, VkImageUsageFlags usage,
VkMemoryPropertyFlags mem_prop_flags, gpointer user_data,
GDestroyNotify notify)
{
GstVulkanImageMemory *mem = NULL;
GstAllocationParams params = { 0, };
VkImageCreateInfo image_info;
VkPhysicalDevice gpu;
GError *error = NULL;
guint32 type_idx;
VkImage image;
VkResult err;
gpu = gst_vulkan_device_get_physical_device (device);
if (!_create_info_from_args (&image_info, format, width, height, tiling,
usage)) {
GST_CAT_ERROR (GST_CAT_VULKAN_IMAGE_MEMORY, "Incorrect image parameters");
goto error;
}
err = vkCreateImage (device->device, &image_info, NULL, &image);
if (gst_vulkan_error_to_g_error (err, &error, "vkCreateImage") < 0)
goto vk_error;
mem = g_new0 (GstVulkanImageMemory, 1);
vkGetImageMemoryRequirements (device->device, image, &mem->requirements);
_vk_image_mem_init (mem, allocator, parent, device, usage, &params,
mem->requirements.size, user_data, notify);
mem->create_info = image_info;
mem->image = image;
err = vkGetPhysicalDeviceImageFormatProperties (gpu, format, VK_IMAGE_TYPE_2D,
tiling, usage, 0, &mem->format_properties);
if (gst_vulkan_error_to_g_error (err, &error,
"vkGetPhysicalDeviceImageFormatProperties") < 0)
goto vk_error;
if (!gst_vulkan_memory_find_memory_type_index_with_type_properties (device,
mem->requirements.memoryTypeBits, mem_prop_flags, &type_idx))
goto error;
if ((mem->requirements.alignment & (mem->requirements.alignment - 1)) != 0) {
g_set_error_literal (&error, GST_VULKAN_ERROR, GST_VULKAN_FAILED,
"Vulkan implementation requires unsupported non-power-of 2 memory alignment");
goto error;
}
params.align = mem->requirements.alignment - 1;
mem->vk_mem = (GstVulkanMemory *) gst_vulkan_memory_alloc (device, type_idx,
&params, mem->requirements.size, mem_prop_flags);
if (!mem->vk_mem)
goto error;
err = vkBindImageMemory (device->device, image, mem->vk_mem->mem_ptr, 0);
if (gst_vulkan_error_to_g_error (err, &error, "vkBindImageMemory") < 0)
goto vk_error;
return mem;
vk_error:
{
GST_CAT_ERROR (GST_CAT_VULKAN_IMAGE_MEMORY,
"Failed to allocate image memory %s", error->message);
g_clear_error (&error);
goto error;
}
error:
{
if (mem)
gst_memory_unref ((GstMemory *) mem);
return NULL;
}
}
static GstVulkanImageMemory *
_vk_image_mem_new_wrapped (GstAllocator * allocator, GstMemory * parent,
GstVulkanDevice * device, VkImage image, VkFormat format, gsize width,
gsize height, VkImageTiling tiling, VkImageUsageFlags usage,
gpointer user_data, GDestroyNotify notify)
{
GstVulkanImageMemory *mem = g_new0 (GstVulkanImageMemory, 1);
GstAllocationParams params = { 0, };
VkPhysicalDevice gpu;
GError *error = NULL;
VkResult err;
gpu = gst_vulkan_device_get_physical_device (device);
mem->image = image;
vkGetImageMemoryRequirements (device->device, mem->image, &mem->requirements);
/* XXX: assumes alignment is a power of 2 */
params.align = mem->requirements.alignment - 1;
params.flags = GST_MEMORY_FLAG_NOT_MAPPABLE;
_vk_image_mem_init (mem, allocator, parent, device, usage, &params,
mem->requirements.size, user_data, notify);
mem->wrapped = TRUE;
if (!_create_info_from_args (&mem->create_info, format, width, height, tiling,
usage)) {
GST_CAT_ERROR (GST_CAT_VULKAN_IMAGE_MEMORY, "Incorrect image parameters");
goto error;
}
err = vkGetPhysicalDeviceImageFormatProperties (gpu, format, VK_IMAGE_TYPE_2D,
tiling, usage, 0, &mem->format_properties);
if (gst_vulkan_error_to_g_error (err, &error,
"vkGetPhysicalDeviceImageFormatProperties") < 0)
goto vk_error;
return mem;
vk_error:
{
GST_CAT_ERROR (GST_CAT_VULKAN_IMAGE_MEMORY,
"Failed to allocate image memory %s", error->message);
g_clear_error (&error);
goto error;
}
error:
{
gst_memory_unref ((GstMemory *) mem);
return NULL;
}
}
static gpointer
_vk_image_mem_map_full (GstVulkanImageMemory * mem, GstMapInfo * info,
gsize size)
{
GstMapInfo *vk_map_info;
/* FIXME: possible layout transformation needed */
g_mutex_lock (&mem->lock);
if (!mem->vk_mem) {
g_mutex_unlock (&mem->lock);
return NULL;
}
vk_map_info = g_new0 (GstMapInfo, 1);
info->user_data[0] = vk_map_info;
if (!gst_memory_map ((GstMemory *) mem->vk_mem, vk_map_info, info->flags)) {
g_free (vk_map_info);
g_mutex_unlock (&mem->lock);
return NULL;
}
g_mutex_unlock (&mem->lock);
return vk_map_info->data;
}
static void
_vk_image_mem_unmap_full (GstVulkanImageMemory * mem, GstMapInfo * info)
{
g_mutex_lock (&mem->lock);
gst_memory_unmap ((GstMemory *) mem->vk_mem, info->user_data[0]);
g_mutex_unlock (&mem->lock);
g_free (info->user_data[0]);
}
static GstMemory *
_vk_image_mem_copy (GstVulkanImageMemory * src, gssize offset, gssize size)
{
return NULL;
}
static GstMemory *
_vk_image_mem_share (GstVulkanImageMemory * mem, gssize offset, gssize size)
{
return NULL;
}
static gboolean
_vk_image_mem_is_span (GstVulkanImageMemory * mem1, GstVulkanImageMemory * mem2,
gsize * offset)
{
return FALSE;
}
static GstMemory *
_vk_image_mem_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_critical ("Subclass should override GstAllocatorClass::alloc() function");
return NULL;
}
static void
_free_view (GstVulkanImageView * view, gpointer unused)
{
gst_vulkan_image_view_unref (view);
}
static void
_vk_image_mem_free (GstAllocator * allocator, GstMemory * memory)
{
GstVulkanImageMemory *mem = (GstVulkanImageMemory *) memory;
GST_CAT_TRACE (GST_CAT_VULKAN_IMAGE_MEMORY, "freeing image memory:%p "
"id:%" G_GUINT64_FORMAT, mem, (guint64) mem->image);
g_warn_if_fail (mem->outstanding_views > 0);
g_ptr_array_unref (mem->outstanding_views);
g_ptr_array_foreach (mem->views, (GFunc) _free_view, NULL);
g_ptr_array_unref (mem->views);
if (mem->image && !mem->wrapped)
vkDestroyImage (mem->device->device, mem->image, NULL);
if (mem->vk_mem)
gst_memory_unref ((GstMemory *) mem->vk_mem);
if (mem->notify)
mem->notify (mem->user_data);
gst_object_unref (mem->device);
g_free (mem);
}
/**
* gst_vulkan_image_memory_alloc:
* @device: a #GstVulkanDevice
* @format: the VkFormat for the new image
* @width: width for the new image
* @height: height for the new image
* @tiling: tiling for the new image
* @usage: usage flags for the new image
* @mem_prop_flags: VkDeviceMemory property flags for the new image
*
* Allocated a new #GstVulkanImageMemory.
*
* Returns: a #GstMemory object backed by a vulkan device memory
*
* Since: 1.18
*/
GstMemory *
gst_vulkan_image_memory_alloc (GstVulkanDevice * device, VkFormat format,
gsize width, gsize height, VkImageTiling tiling, VkImageUsageFlags usage,
VkMemoryPropertyFlags mem_prop_flags)
{
GstVulkanImageMemory *mem;
mem = _vk_image_mem_new_alloc (_vulkan_image_memory_allocator, NULL, device,
format, width, height, tiling, usage, mem_prop_flags, NULL, NULL);
return (GstMemory *) mem;
}
/**
* gst_vulkan_image_memory_wrapped:
* @device: a #GstVulkanDevice
* @image: a VkImage
* @format: the VkFormat for @image
* @width: width of @image
* @height: height of @image
* @tiling: tiling of @image
* @usage: usage flags of @image
* @user_data: (nullable): user data for @notify
* @notify: a #DestroyNotify when @image is no longer needed
*
* Return: a new #GstVulkanImageMemory wrapping @image
*
* Since: 1.18
*/
GstMemory *
gst_vulkan_image_memory_wrapped (GstVulkanDevice * device, VkImage image,
VkFormat format, gsize width, gsize height, VkImageTiling tiling,
VkImageUsageFlags usage, gpointer user_data, GDestroyNotify notify)
{
GstVulkanImageMemory *mem;
mem = _vk_image_mem_new_wrapped (_vulkan_image_memory_allocator, NULL, device,
image, format, width, height, tiling, usage, user_data, notify);
return (GstMemory *) mem;
}
/**
* gst_vulkan_image_memory_get_width:
* @image: a #GstVulkanImageMemory
*
* Return: the width of @image
*
* Since: 1.18
*/
guint32
gst_vulkan_image_memory_get_width (GstVulkanImageMemory * image)
{
g_return_val_if_fail (gst_is_vulkan_image_memory (GST_MEMORY_CAST (image)),
0);
return image->create_info.extent.width;
}
/**
* gst_vulkan_image_memory_get_height:
* @image: a #GstVulkanImageMemory
*
* Return: the height of @image
*
* Since: 1.18
*/
guint32
gst_vulkan_image_memory_get_height (GstVulkanImageMemory * image)
{
g_return_val_if_fail (gst_is_vulkan_image_memory (GST_MEMORY_CAST (image)),
0);
return image->create_info.extent.height;
}
static gint
find_view_index_unlocked (GstVulkanImageMemory * image,
GstVulkanImageView * view)
{
guint index;
if (!g_ptr_array_find (image->views, view, &index))
return -1;
return (gint) index;
}
extern void
gst_vulkan_image_memory_release_view (GstVulkanImageMemory * image,
GstVulkanImageView * view);
void
gst_vulkan_image_memory_release_view (GstVulkanImageMemory * image,
GstVulkanImageView * view)
{
guint index;
g_return_if_fail (gst_is_vulkan_image_memory (GST_MEMORY_CAST (image)));
g_mutex_lock (&image->lock);
GST_CAT_TRACE (GST_CAT_VULKAN_IMAGE_MEMORY, "image %p removing view %p",
image, view);
if (g_ptr_array_find (image->outstanding_views, view, &index)) {
/* really g_ptr_array_steal_index_fast() but that requires glib 2.58 */
g_ptr_array_remove_index_fast (image->outstanding_views, index);
g_ptr_array_add (image->views, view);
} else {
g_warning ("GstVulkanImageMemory:%p attempt to remove a view %p "
"that we do not own", image, view);
}
gst_clear_mini_object ((GstMiniObject **) & view->image);
g_mutex_unlock (&image->lock);
}
/**
* gst_vulkan_image_memory_add_view:
* @image: a #GstVulkanImageMemory
* @view: a #GstVulkanImageView
*
* Return: the height of @image
*
* Since: 1.18
*/
void
gst_vulkan_image_memory_add_view (GstVulkanImageMemory * image,
GstVulkanImageView * view)
{
g_return_if_fail (gst_is_vulkan_image_memory (GST_MEMORY_CAST (image)));
g_return_if_fail (view != NULL);
g_return_if_fail (image == view->image);
g_mutex_lock (&image->lock);
if (find_view_index_unlocked (image, view) != -1) {
g_warn_if_reached ();
g_mutex_unlock (&image->lock);
return;
}
g_ptr_array_add (image->outstanding_views, view);
GST_CAT_TRACE (GST_CAT_VULKAN_IMAGE_MEMORY, "Image %p adding view %p",
image, view);
g_mutex_unlock (&image->lock);
}
struct view_data
{
GstVulkanImageMemory *img;
GstVulkanImageMemoryFindViewFunc find_func;
gpointer find_data;
};
static gboolean
find_view_func (GstVulkanImageView * view, gpointer user_data)
{
struct view_data *data = user_data;
GstVulkanImageMemory *previous;
gboolean ret;
previous = view->image;
view->image = data->img;
ret = data->find_func (view, data->find_data);
view->image = previous;
return ret;
}
/**
* gst_vulkan_image_memory_find_view:
* @image: a #GstVulkanImageMemory
* @find_func: #GstVulkanImageMemoryFindViewFunc to search with
* @data: user data to call @finc_func with
*
* Return: (transfer full): the first #GstVulkanImageView that @find_func
* returns %TRUE for, or %NULL
*
* Since: 1.18
*/
GstVulkanImageView *
gst_vulkan_image_memory_find_view (GstVulkanImageMemory * image,
GstVulkanImageMemoryFindViewFunc find_func, gpointer data)
{
GstVulkanImageView *ret = NULL;
struct view_data view;
guint index;
g_return_val_if_fail (gst_is_vulkan_image_memory (GST_MEMORY_CAST (image)),
NULL);
g_return_val_if_fail (find_func != NULL, NULL);
g_mutex_lock (&image->lock);
view.img = image;
view.find_func = find_func;
view.find_data = data;
if (g_ptr_array_find_with_equal_func (image->outstanding_views, &view,
(GEqualFunc) find_view_func, &index)) {
ret =
gst_vulkan_image_view_ref (g_ptr_array_index (image->outstanding_views,
index));
} else if (g_ptr_array_find_with_equal_func (image->views, &view,
(GEqualFunc) find_view_func, &index)) {
/* really g_ptr_array_steal_index_fast() but that requires glib 2.58 */
ret = g_ptr_array_remove_index_fast (image->views, index);
g_ptr_array_add (image->outstanding_views, ret);
ret->image = (GstVulkanImageMemory *) gst_memory_ref ((GstMemory *) image);
}
GST_CAT_TRACE (GST_CAT_VULKAN_IMAGE_MEMORY, "Image %p found view %p",
image, ret);
g_mutex_unlock (&image->lock);
return ret;
}
G_DEFINE_TYPE (GstVulkanImageMemoryAllocator, gst_vulkan_image_memory_allocator,
GST_TYPE_ALLOCATOR);
static void
gst_vulkan_image_memory_allocator_class_init (GstVulkanImageMemoryAllocatorClass
* klass)
{
GstAllocatorClass *allocator_class = (GstAllocatorClass *) klass;
allocator_class->alloc = _vk_image_mem_alloc;
allocator_class->free = _vk_image_mem_free;
}
static void
gst_vulkan_image_memory_allocator_init (GstVulkanImageMemoryAllocator *
allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_VULKAN_IMAGE_MEMORY_ALLOCATOR_NAME;
alloc->mem_map_full = (GstMemoryMapFullFunction) _vk_image_mem_map_full;
alloc->mem_unmap_full = (GstMemoryUnmapFullFunction) _vk_image_mem_unmap_full;
alloc->mem_copy = (GstMemoryCopyFunction) _vk_image_mem_copy;
alloc->mem_share = (GstMemoryShareFunction) _vk_image_mem_share;
alloc->mem_is_span = (GstMemoryIsSpanFunction) _vk_image_mem_is_span;
}
/**
* gst_vulkan_image_memory_init_once:
*
* Initializes the Vulkan image memory allocator. It is safe to call this function
* multiple times. This must be called before any other #GstVulkanImageMemory operation.
*
* Since: 1.18
*/
void
gst_vulkan_image_memory_init_once (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_VULKAN_IMAGE_MEMORY, "vulkanimagememory",
0, "Vulkan Image Memory");
_vulkan_image_memory_allocator =
g_object_new (gst_vulkan_image_memory_allocator_get_type (), NULL);
gst_object_ref_sink (_vulkan_image_memory_allocator);
gst_allocator_register (GST_VULKAN_IMAGE_MEMORY_ALLOCATOR_NAME,
gst_object_ref (_vulkan_image_memory_allocator));
g_once_init_leave (&_init, 1);
}
}
/**
* gst_is_vulkan_image_memory:
* @mem: a #GstMemory
*
* Returns: whether the memory at @mem is a #GstVulkanImageMemory
*
* Since: 1.18
*/
gboolean
gst_is_vulkan_image_memory (GstMemory * mem)
{
return mem != NULL && mem->allocator != NULL &&
g_type_is_a (G_OBJECT_TYPE (mem->allocator),
GST_TYPE_VULKAN_IMAGE_MEMORY_ALLOCATOR);
}