Allows for it to be reused.
---
 libavutil/hwcontext_vulkan.c | 42 ++++++------------------------------
 libavutil/vulkan.c           | 34 +++++++++++++++++++++++++++++
 libavutil/vulkan.h           |  6 ++++++
 3 files changed, 46 insertions(+), 36 deletions(-)

diff --git a/libavutil/hwcontext_vulkan.c b/libavutil/hwcontext_vulkan.c
index d7822d4629..e9fa734518 100644
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -437,40 +437,6 @@ static const struct FFVkFormatEntry 
*vk_find_format_entry(enum AVPixelFormat p)
     return NULL;
 }
 
-/* Malitia pura, Khronos */
-#define FN_MAP_TO(dst_t, dst_name, src_t, src_name)                            
     \
-    static av_unused dst_t map_ ##src_name## _to_ ##dst_name(src_t src) \
-    {                                                                   \
-        dst_t dst = 0x0;                                                \
-        MAP_TO(VK_FORMAT_FEATURE_2_SAMPLED_IMAGE_BIT,                   \
-               VK_IMAGE_USAGE_SAMPLED_BIT);                             \
-        MAP_TO(VK_FORMAT_FEATURE_2_TRANSFER_SRC_BIT,                    \
-               VK_IMAGE_USAGE_TRANSFER_SRC_BIT);                        \
-        MAP_TO(VK_FORMAT_FEATURE_2_TRANSFER_DST_BIT,                    \
-               VK_IMAGE_USAGE_TRANSFER_DST_BIT);                        \
-        MAP_TO(VK_FORMAT_FEATURE_2_STORAGE_IMAGE_BIT,                   \
-               VK_IMAGE_USAGE_STORAGE_BIT);                             \
-        MAP_TO(VK_FORMAT_FEATURE_2_COLOR_ATTACHMENT_BIT,                \
-               VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);                    \
-        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_DECODE_OUTPUT_BIT_KHR,         \
-               VK_IMAGE_USAGE_VIDEO_DECODE_DST_BIT_KHR);                \
-        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_DECODE_DPB_BIT_KHR,            \
-               VK_IMAGE_USAGE_VIDEO_DECODE_DPB_BIT_KHR);                \
-        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_ENCODE_DPB_BIT_KHR,            \
-               VK_IMAGE_USAGE_VIDEO_ENCODE_DPB_BIT_KHR);                \
-        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_ENCODE_INPUT_BIT_KHR,          \
-               VK_IMAGE_USAGE_VIDEO_ENCODE_SRC_BIT_KHR);                \
-        return dst;                                                     \
-    }
-
-#define MAP_TO(flag1, flag2) if (src & flag2) dst |= flag1;
-FN_MAP_TO(VkFormatFeatureFlagBits2, feats, VkImageUsageFlags, usage)
-#undef MAP_TO
-#define MAP_TO(flag1, flag2) if (src & flag1) dst |= flag2;
-FN_MAP_TO(VkImageUsageFlags, usage, VkFormatFeatureFlagBits2, feats)
-#undef MAP_TO
-#undef FN_MAP_TO
-
 static int vkfmt_from_pixfmt2(AVHWDeviceContext *dev_ctx, enum AVPixelFormat p,
                               VkImageTiling tiling,
                               VkFormat fmts[AV_NUM_DATA_POINTERS], /* Output 
format list */
@@ -538,7 +504,7 @@ static int vkfmt_from_pixfmt2(AVHWDeviceContext *dev_ctx, 
enum AVPixelFormat p,
                 if (aspect)
                     *aspect = vk_formats_list[i].aspect;
                 if (supported_usage)
-                    *supported_usage = map_feats_to_usage(feats_primary) |
+                    *supported_usage = ff_vk_map_feats_to_usage(feats_primary) 
|
                                        ((need_storage && (storage_primary | 
storage_secondary)) ?
                                         VK_IMAGE_USAGE_STORAGE_BIT : 0);
                 return 0;
@@ -553,7 +519,7 @@ static int vkfmt_from_pixfmt2(AVHWDeviceContext *dev_ctx, 
enum AVPixelFormat p,
                 if (aspect)
                     *aspect = vk_formats_list[i].aspect;
                 if (supported_usage)
-                    *supported_usage = map_feats_to_usage(feats_secondary);
+                    *supported_usage = 
ff_vk_map_feats_to_usage(feats_secondary);
                 return 0;
             } else {
                 return AVERROR(ENOTSUP);
@@ -2681,6 +2647,10 @@ static AVBufferRef *vulkan_pool_alloc(void *opaque, 
size_t size)
                          VK_EXTERNAL_MEMORY_HANDLE_TYPE_OPAQUE_FD_BIT);
 #endif
 
+    if (p->vkctx.extensions & FF_VK_EXT_EXTERNAL_DMABUF_MEMORY)
+        try_export_flags(hwfc, &eiinfo.handleTypes, &e,
+                         VK_EXTERNAL_MEMORY_HANDLE_TYPE_DMA_BUF_BIT_EXT);
+
     for (int i = 0; i < av_pix_fmt_count_planes(hwfc->sw_format); i++) {
         eminfo[i].sType       = VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO;
         eminfo[i].pNext       = hwctx->alloc_pnext[i];
diff --git a/libavutil/vulkan.c b/libavutil/vulkan.c
index 8b02abecf1..8ab977c734 100644
--- a/libavutil/vulkan.c
+++ b/libavutil/vulkan.c
@@ -84,6 +84,40 @@ const char *ff_vk_ret2str(VkResult res)
 #undef CASE
 }
 
+/* Malitia pura, Khronos */
+#define FN_MAP_TO(dst_t, dst_name, src_t, src_name)                            
     \
+    dst_t ff_vk_map_ ##src_name## _to_ ##dst_name(src_t src) \
+    {                                                                   \
+        dst_t dst = 0x0;                                                \
+        MAP_TO(VK_FORMAT_FEATURE_2_SAMPLED_IMAGE_BIT,                   \
+               VK_IMAGE_USAGE_SAMPLED_BIT);                             \
+        MAP_TO(VK_FORMAT_FEATURE_2_TRANSFER_SRC_BIT,                    \
+               VK_IMAGE_USAGE_TRANSFER_SRC_BIT);                        \
+        MAP_TO(VK_FORMAT_FEATURE_2_TRANSFER_DST_BIT,                    \
+               VK_IMAGE_USAGE_TRANSFER_DST_BIT);                        \
+        MAP_TO(VK_FORMAT_FEATURE_2_STORAGE_IMAGE_BIT,                   \
+               VK_IMAGE_USAGE_STORAGE_BIT);                             \
+        MAP_TO(VK_FORMAT_FEATURE_2_COLOR_ATTACHMENT_BIT,                \
+               VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT);                    \
+        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_DECODE_OUTPUT_BIT_KHR,         \
+               VK_IMAGE_USAGE_VIDEO_DECODE_DST_BIT_KHR);                \
+        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_DECODE_DPB_BIT_KHR,            \
+               VK_IMAGE_USAGE_VIDEO_DECODE_DPB_BIT_KHR);                \
+        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_ENCODE_DPB_BIT_KHR,            \
+               VK_IMAGE_USAGE_VIDEO_ENCODE_DPB_BIT_KHR);                \
+        MAP_TO(VK_FORMAT_FEATURE_2_VIDEO_ENCODE_INPUT_BIT_KHR,          \
+               VK_IMAGE_USAGE_VIDEO_ENCODE_SRC_BIT_KHR);                \
+        return dst;                                                     \
+    }
+
+#define MAP_TO(flag1, flag2) if (src & flag2) dst |= flag1;
+FN_MAP_TO(VkFormatFeatureFlagBits2, feats, VkImageUsageFlags, usage)
+#undef MAP_TO
+#define MAP_TO(flag1, flag2) if (src & flag1) dst |= flag2;
+FN_MAP_TO(VkImageUsageFlags, usage, VkFormatFeatureFlagBits2, feats)
+#undef MAP_TO
+#undef FN_MAP_TO
+
 static void load_enabled_qfs(FFVulkanContext *s)
 {
     s->nb_qfs = 0;
diff --git a/libavutil/vulkan.h b/libavutil/vulkan.h
index 2fb7f7c2de..49f015ae9d 100644
--- a/libavutil/vulkan.h
+++ b/libavutil/vulkan.h
@@ -364,6 +364,12 @@ int ff_vk_init(FFVulkanContext *s, void *log_parent,
  */
 const char *ff_vk_ret2str(VkResult res);
 
+/**
+ * Map between usage and features.
+ */
+VkImageUsageFlags ff_vk_map_feats_to_usage(VkFormatFeatureFlagBits2 feats);
+VkFormatFeatureFlagBits2 ff_vk_map_usage_to_feats(VkImageUsageFlags usage);
+
 /**
  * Returns 1 if pixfmt is a usable RGB format.
  */
-- 
2.49.0.395.g12beb8f557c
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