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Hello,
When I use mmioOpen, all other mmio methods are working fine on Win 11 latest update.
However mmioOpen is deprecated and I should use CreateFile or CreateFile2 instead that's what the documentation says (https://learn.microsoft.com/en-us/windows/win32/api/mmiscapi/nf-mmiscapi-mmioopen) .
My issue is that creating a wav file by method CreateFile, all other mmio methods like mmioAscend return code 263 (MMIOERR_CANNOTSEEK). What is the proper way to use CreateFile or CreateFile2 to work correctly with mmio?
The code I use is posted here by Rita Han (https://stackoverflow.com/questions/64318206/record-an-audio-stream-with-wasapi)
Thank you.
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I have confirmed that the mmioOpen API is deprecated. If you are trying to parse through the RIFF chunks, mmio* can be useful because it is setup to specifically navigate through the frames without the developer having to do a lot of calculations there. However, if you are just trying to do simple WASAPI, best bet is to probably just follow more or less what the UWP sample is doing (WASAPI APIs work for both desktop and WinRT):
CreateFile() can be used in stead of the StorageFIle APIs to read / write bytes of the IAudioClient buffer.
mmioOpen function is deprecated
It is not deprecated
It is a bug in documentation
You would need a lot of code to replace all what mmioOpen does...
Thank you, but I want to wait for the answer from Microsoft why this is.
It has been marked deprecated by mistake after Vista SDK, ~13 years ago. I don't think MS people who did the SDK migration are still there...
Thank you! Second time in 1 year I run in to this misinformation. MS is a bit sloppy with maintenances' as I remember and even if you point to that, it returns bad English or no knowledge at all for an answer.. :-(
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Hello
You can refer to the CaptureSharedEventDriven sample, which also Write the captured wave data to an output file using CreateFile and WriteFile or the ApplicationLoopback sample.
And note that the CaptureSharedEventDriven sample has a flaw after resuming from a breakpoint.
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Hello @Tony, does it solve your question? Or you no longer need to replace as @Castorix31 said.
If MMioOpen is deprecated, why are all other MMio methods not?
Because the documentation says clearly: "The handle returned by mmioOpen is not a standard file handle; do not use it with any file I/O functions other than multimedia file I/O functions." So, the reverse is also true, a filehandle returned by **CreateFile **is NOT compatible with MMIo. Should we conclude that CreateFile will not work at all with MMio methods? If so, CreateFile is not an option, and so the documentation is wrong. In that case Castorix31 is right when he says the documentation about MMioOpen is not right.
If the documentation is correct, that will leave's the question as mentioned in the first place: What is the proper way to use CreateFile or CreateFile2 to work correctly with mmio? Thank you.