include: Add D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAGS in d3d12video.idl.

include/d3d12video.idl

@@ -1594,6 +1594,17 @@ typedef struct D3D12_VIDEO_ENCODER_FRAME_SUBREGION_METADATA
     UINT64 bHeaderSize;
 } D3D12_VIDEO_ENCODER_FRAME_SUBREGION_METADATA;
 
+typedef enum D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAGS
+{
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_NO_ERROR = 0x0,
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_CODEC_PICTURE_CONTROL_NOT_SUPPORTED = 0x1,
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_SUBREGION_LAYOUT_CONFIGURATION_NOT_SUPPORTED = 0x2,
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_INVALID_REFERENCE_PICTURES = 0x4,
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_RECONFIGURATION_REQUEST_NOT_SUPPORTED = 0x8,
+    D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAG_INVALID_METADATA_BUFFER_SOURCE = 0x10,
+} D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAGS;
+cpp_quote("DEFINE_ENUM_FLAG_OPERATORS(D3D12_VIDEO_ENCODER_ENCODE_ERROR_FLAGS);")
+
 typedef struct D3D12_VIDEO_ENCODER_OUTPUT_METADATA_STATISTICS
 {
     UINT64 AverageQP;