Developer Documentation

QuickTime 4 API Documentation
QuickTime Music Architecture

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Music Packet Status

These constants are used in the reserved field of the MIDI packet structure [link] .

enum {
    kMusicPacketPortLost        = 1,
    kMusicPacketPortFound       = 2,
    kMusicPacketTimeGap         = 3
};

Constant descriptions

kMusicPacketPortLost
The application has lost the default input port.

kMusicPacketPortFound
The application has retrieved the input port from the previous owner.

kMusicPacketTimeGap
The last byte of the packet specifies how long (in milliseconds) to keep the MIDI line silent after sending the packet.

© 1999 Apple Computer, Inc.

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