[Media_api] MAC dynamic ports

[Amit Itzkovich]

Hi Predrag,

Actually I will still need to change portmidi because virtual sources use a different CoreMIDI function to send MIDI. Sources bound to a device use the MIDISend function to send data to a destination, while virtual sources use the MIDIReceived function to distribute the MIDI messages to any client input ports connected to that source.
So I might not need to change the basic data structures, but some code will have to added/changed.
Let me know if you have any thoughts about it.

Thanks,
Amit