diff --git a/include/Makefile.in b/include/Makefile.in
index df049fd284f..756e25dcc82 100644
--- a/include/Makefile.in
+++ b/include/Makefile.in
@@ -408,6 +408,7 @@ SOURCES = \
 	mediaobj.idl \
 	metahost.idl \
 	mfapi.h \
+	mfd3d12.idl \
 	mferror.h \
 	mfidl.idl \
 	mfmediaengine.idl \
diff --git a/include/mfd3d12.idl b/include/mfd3d12.idl
new file mode 100644
index 00000000000..2098e6d405a
--- /dev/null
+++ b/include/mfd3d12.idl
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2021 Nikolay Sivov for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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
+ */
+
+import "mfidl.idl";
+import "d3d12.idl";
+
+[
+    object,
+    uuid(09d0f835-92ff-4e53-8efa-40faa551f233),
+    local
+]
+interface IMFD3D12SynchronizationObjectCommands : IUnknown
+{
+    HRESULT EnqueueResourceReady([in] ID3D12CommandQueue *producer_queue);
+    HRESULT EnqueueResourceReadyWait([in] ID3D12CommandQueue *consumer_queue);
+    HRESULT SignalEventOnResourceReady(HANDLE event);
+    HRESULT EnqueueResourceRelease([in] ID3D12CommandQueue *consumer_queue);
+}
+
+[
+    object,
+    uuid(802302b0-82de-45e1-b421-f19ee5bdaf23),
+    local
+]
+interface IMFD3D12SynchronizationObject : IUnknown
+{
+    HRESULT SignalEventOnFinalResourceRelease(HANDLE hEvent);
+}
+
+typedef enum MF_MT_D3D_RESOURCE_VERSION_ENUM
+{
+    MF_D3D11_RESOURCE,
+    MF_D3D12_RESOURCE
+} MF_MT_D3D_RESOURCE_VERSION_ENUM;
+
+cpp_quote("EXTERN_GUID(MF_D3D12_SYNCHRONIZATION_OBJECT, 0x2a7c8d6a, 0x85a6, 0x494d, 0xa0, 0x46, 0x06, 0xea, 0x1a, 0x13, 0x8f, 0x4b);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D_RESOURCE_VERSION, 0x174f1e85, 0xfe26, 0x453d, 0xb5, 0x2e, 0x5b, 0xdd, 0x4e, 0x55, 0xb9, 0x44);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_CPU_READBACK, 0x28ee9fe3, 0xd481, 0x46a6, 0xb9, 0x8a, 0x7f, 0x69, 0xd5, 0x28, 0xe, 0x82);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_TEXTURE_LAYOUT, 0x97c85caa, 0xbeb, 0x4ee1, 0x97, 0x15, 0xf2, 0x2f, 0xad, 0x8c, 0x10, 0xf5);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET, 0xeeac2585, 0x3430, 0x498c, 0x84, 0xa2, 0x77, 0xb1, 0xbb, 0xa5, 0x70, 0xf6);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL, 0xb1138dc3, 0x01d5, 0x4c14, 0x9b, 0xdc, 0xcd, 0xc9, 0x33, 0x6f, 0x55, 0xb9);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS, 0x82c85647, 0x5057, 0x4960, 0x95, 0x59, 0xf4, 0x5b, 0x8e, 0x27, 0x14, 0x27);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_DENY_SHADER_RESOURCE, 0xba06bfac, 0xffe3, 0x474a, 0xab, 0x55, 0x16, 0x1e, 0xe4, 0x41, 0x7a, 0x2e);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_ALLOW_CROSS_ADAPTER, 0xa6a1e439, 0x2f96, 0x4ab5, 0x98, 0xdc, 0xad, 0xf7, 0x49, 0x73, 0x50, 0x5d);")
+cpp_quote("EXTERN_GUID(MF_MT_D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS, 0xa4940b2, 0xcfd6, 0x4738, 0x9d, 0x02, 0x98, 0x11, 0x37, 0x34, 0x01, 0x5a);")
+cpp_quote("EXTERN_GUID(MF_SA_D3D12_HEAP_FLAGS, 0x496b3266, 0xd28f, 0x4f8c, 0x93, 0xa7, 0x4a, 0x59, 0x6b, 0x1a, 0x31, 0xa1);")
+cpp_quote("EXTERN_GUID(MF_SA_D3D12_HEAP_TYPE, 0x56f26a76, 0xbbc1, 0x4ce0, 0xbb, 0x11, 0xe2, 0x23, 0x68, 0xd8, 0x74, 0xed);")
+cpp_quote("EXTERN_GUID(MF_SA_D3D12_CLEAR_VALUE, 0x86ba9a39, 0x526, 0x495d, 0x9a, 0xb5, 0x54, 0xec, 0x9f, 0xad, 0x6f, 0xc3);")