Add an option to create a new MediaFoundationReader from stream

I’m using your amazing library in UWP and I would love if the new MediaFoundationReader() constructor would accept also preferably a stream (or bytes or buffer) instead of a file path only, in this way I’ll be able to use it directly with no need to copy the file to an app folder or ask for a broader filesystem permission, hopefully it’s possible.

Thanks

[wtywtykk]

Not until I searched the reference of MFCreateMFByteStreamOnStreamEx did I realize there’s already something called StreamMediaFoundationReader… So it’s just unnecessary to write our own wrappers…

[wtywtykk]

In MediaFoundationReader.cs the original CreateReader function uses MFCreateSourceReaderFromURL to read files. And MFCreateSourceReaderFromByteStream is the stream version. Here’s the code I used:

System.Runtime.InteropServices.ComTypes.IStream managedStream=new WaveStreams.ManagedIStream(stream);
IMFByteStream byteStream;
MediaFoundationInterop.MFCreateMFByteStreamOnStream(managedStream, out byteStream);
MediaFoundationInterop.MFCreateSourceReaderFromByteStream(byteStream, null, out reader);
Marshal.ReleaseComObject(byteStream);

I don’t know how to calculate the BPM. But maybe you can check this out https://github.com/stengerh/foo_bpm