JackProcessCallback

Prototype for the client supplied function that is called by the engine anytime there is work to be done.

@pre nframes == jack_get_buffer_size() @pre nframes == pow(2,x)

@param nframes number of frames to process @param arg pointer to a client supplied structure

@return zero on success, non-zero on error

extern (C)
alias JackProcessCallback = int function

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