Contribute ChannelMixerSampleProvider - arbitrary mixing of channels in a stream #982
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This pull request is to contribute a new class, ChannelMixerSampleProvider, which allows a caller to remix the channels of a stream using an arbitrary matrix, with support for changing the number of output channels based on the configuration of the matrix. Example matrixes are provided in the ChannelMixMatrix class. For example, the mixer permits a caller to provide a 2-row/6-column matrix that would convert 2-channel input to 6-channel output.
I've tested manually using three audio devices - built-in motherboard realtek interface, a Motu M4, and a SoundBlaster G5.