midi_loop_start, midi_loop_end - Loop start and end points, set by play_looped_midi(). Allegro game

       The loop start and end points, set by the play_looped_midi() function.  These may safely be altered while
       the music is playing, but you should be sure they are always set to sensible values (start < end). If you
       are changing them both at the same time, make sure to alter them in  the  right  order  in  case  a  MIDI
       interrupt  happens  to  occur in between your two writes! Setting these values to -1 represents the start
       and end of the file respectively.

       midi_loop_start,  midi_loop_end  -  Loop  start  and  end points, set by play_looped_midi(). Allegro game
       programming library.

play_looped_midi(3alleg4)

Allegro                                           version 4.4.3                         midi_loop_start(3alleg4)

#include<allegro.h>externlongmidi_loop_start;externlongmidi_loop_end;