Category: Uncategorized

Wait for IAsyncAction on STA thread

Figured out how to elegantly do a blocking wait for an asynchronous coroutine-enabled function on a STA thread. You can’t do this: There is an assertion failure because .get() assumes ability to block. On STA this hits a failure in winrt::impl::blocking_suspend call. So you have to avoid doing .get() to synchronize and there should be…

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Hardware AV1 video encoders are coming

There is something interesting finally happening with video encoding and also Media Foundation: IntelĀ® Hybrid AV1 Encoder MFT 11 Attributes: MFT_TRANSFORM_CLSID_Attribute: {62C053CE-5357-4794-8C5A-FBEFFEFFB82D} (Type VT_CLSID) MF_TRANSFORM_FLAGS_Attribute: MFT_ENUM_FLAG_HARDWARE MFT_ENUM_HARDWARE_VENDOR_ID_Attribute: VEN_8086 (Type VT_LPWSTR) MFT_ENUM_HARDWARE_URL_Attribute: AA243E5D-2F73-48c7-97F7-F6FA17651651 (Type VT_LPWSTR) MFT_INPUT_TYPES_Attributes: {3231564E-3961-42AE-BA67-FF47CCC13EED}, MFVideoFormat_NV12 MFT_OUTPUT_TYPES_Attributes: MFVideoFormat_AV1 MFT_CODEC_MERIT_Attribute: 7 (Type VT_UI4) MFT_SUPPORT_DYNAMIC_FORMAT_CHANGE: 1 (Type VT_UI4) MF_TRANSFORM_ASYNC: 1 (Type VT_UI4) Intel UHD graphics coming…

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Modern asynchronous C++

Windows API offers asynchronously implemented functionality for file, network and other I/O since long ago. It was maybe one of the easiest way to make a simple thing messy and ridiculously bloated and sensitive to errors of sorts. If you’re sane and you don’t need to squeeze everything out something you would just not use…

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So, what “W” is for in lstrcmpW

So I took time and submitted a request to update lstrcmpW documentation because it is inaccurate. It seemed pretty obvious that Syntax section shows W types (correct) and Parameters section shows T types trying to document the same thing. Some articles, for CRT functions specifically, solve this by documenting a set of similar functions at…

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Internal E_UNEXPECTED in dxgi.dll

Someone asked a question on StackOverflow recently about suspicious debug output messages associated with DXGI/Direct3D initialization: DirectX12: dxgi dll catastrophic failure when creating IDXGIFactory. onecore\windows\directx\database\helperlibrary\lib\perappusersettingsqueryimpl.cpp(121)\dxgi.dll!00007FFBA0D6D7F8: (caller: 00007FFBA0D4D167) ReturnHr(1) tid(64d8) 8000FFFF Catastrophic failure onecore\windows\directx\database\helperlibrary\lib\perappusersettingsqueryimpl.cpp(98)\dxgi.dll!00007FFBA0D6D4D0: (caller: 00007FFBA0D3E221) ReturnHr(2) tid(64d8) 8000FFFF Catastrophic failure onecore\windows\directx\database\helperlibrary\lib\directxdatabasehelper.cpp(999)\dxgi.dll!00007FFBA0D6D4FC: (caller: 00007FFBA0D3E221) ReturnHr(3) tid(64d8) 8000FFFF Catastrophic failure This problem is not fatal or severe…

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