midi_msg_callback, midi_meta_callback, midi_sysex_callback - Hook functions allowing you to intercept

       Hook functions allowing you to intercept MIDI player events. If set to anything other  than  NULL,  these
       routines  will be called for each MIDI message, meta-event, and system exclusive data block respectively.
       They will execute in an interrupt handler context, so all the code and data they use  should  be  locked,
       and they must not call any operating system functions. In general you just use these routines to set some
       flags and respond to them later in your mainline code.

       midi_msg_callback,  midi_meta_callback,  midi_sysex_callback  -  Hook functions allowing you to intercept
       MIDI player events. Allegro game programming library.

play_midi(3alleg4)

Allegro                                           version 4.4.3                       midi_msg_callback(3alleg4)

#include<allegro.h>externvoid(*midi_msg_callback)(intmsg,intbyte1,intbyte2);externvoid(*midi_meta_callback)(inttype,constunsignedchar*data,intlength);externvoid(*midi_sysex_callback)(constunsignedchar*data,intlength);