oidn: Fix build for VS 2017

Backporting this upstream patch:
1e42e6db81

Fixes #39186.

COPYRIGHT.txt

@@ -299,7 +299,7 @@ License: Zlib
 
 Files: ./thirdparty/oidn/
 Comment: Intel Open Image Denoise
-Copyright: 2009-2020, Intel Corporation
+Copyright: 2009-2019, Intel Corporation
 License: Apache-2.0
 
 Files: ./thirdparty/opus/

thirdparty/README.md

@@ -446,7 +446,7 @@ Files extracted from the upstream source:
 ## oidn
 
 - Upstream: https://github.com/OpenImageDenoise/oidn
-- Version: 1.1.0 (c58c5216db05ceef4cde5a096862f2eeffd14c06)
+- Version: 1.1.0 (c58c5216db05ceef4cde5a096862f2eeffd14c06, 2019)
 - License: Apache 2.0
 
 Files extracted from upstream source:
@@ -461,8 +461,8 @@ weights/rtlightmap_hdr.tza
 scripts/resource_to_cpp.py
 
 Modified files:
-Modifications are marked with `// -- GODOT start --` and `// -- GODOT end --`
-A patch file is provided in `oidn/godot-changes-c58c5216.patch`
+Modifications are marked with `// -- GODOT start --` and `// -- GODOT end --`.
+Patch files are provided in `oidn/patches/`.
 
 core/autoencoder.cpp
 core/autoencoder.h

thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp

@@ -131,7 +131,7 @@ struct rnn_weights_reorder_t : public cpu_primitive_t {
             return status::success;
         }
 
-        format_tag_t itag_;
+        format_tag_t itag_ = mkldnn_format_tag_undef;
 
     private:
         void init_scratchpad() {

thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp

@@ -96,9 +96,9 @@ struct simple_concat_t: public cpu_primitive_t {
             return status::success;
         }
 
-        int perm_[MKLDNN_MAX_NDIMS];
-        int iperm_[MKLDNN_MAX_NDIMS];
-        dims_t blocks_;
+        int perm_[MKLDNN_MAX_NDIMS] {};
+        int iperm_[MKLDNN_MAX_NDIMS] {};
+        dims_t blocks_ {};
 
         dim_t nelems_to_concat(const memory_desc_wrapper &data_d) const {
             const int ndims = data_d.ndims();

thirdparty/oidn/patches/mkl-dnn-fix-vs2017-build.patch

@@ -0,0 +1,45 @@
+Rediffed by @akien-mga to match oidn 1.1.0 source.
+
+From 1e42e6db81e1a5270ecc0191c5385ce7e7d978e9 Mon Sep 17 00:00:00 2001
+From: Jeremy Wong <jmw@netvigator.com>
+Date: Wed, 11 Sep 2019 04:46:53 +0800
+Subject: [PATCH] src: initialize members in some structures to prevent compile
+ errors with VS2017
+
+addresses "error C3615: constexpr function '...' cannot result in a constant expression" with VS2017
+---
+ src/cpu/rnn/rnn_reorders.hpp | 2 +-
+ src/cpu/simple_concat.hpp    | 6 +++---
+ src/cpu/simple_sum.hpp       | 2 +-
+ 3 files changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
+index 597c63e3f8..ae1551390a 100644
+--- a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
++++ b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
+@@ -131,7 +131,7 @@ struct rnn_weights_reorder_t : public cpu_primitive_t {
+             return status::success;
+         }
+
+-        format_tag_t itag_;
++        format_tag_t itag_ = mkldnn_format_tag_undef;
+
+     private:
+         void init_scratchpad() {
+diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
+index 5177275452..057cc3c4c7 100644
+--- a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
++++ b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
+@@ -96,9 +96,9 @@ struct simple_concat_t: public cpu_primitive_t {
+             return status::success;
+         }
+
+-        int perm_[MKLDNN_MAX_NDIMS];
+-        int iperm_[MKLDNN_MAX_NDIMS];
+-        dims_t blocks_;
++        int perm_[MKLDNN_MAX_NDIMS] {};
++        int iperm_[MKLDNN_MAX_NDIMS] {};
++        dims_t blocks_ {};
+
+         dim_t nelems_to_concat(const memory_desc_wrapper &data_d) const {
+             const int ndims = data_d.ndims();