al_get_audio_stream_fragments - Allegro 5 API

       Returns   the   number   of   fragments  this  stream  uses.   This  is  the  same  value  as  passed  to
       al_create_audio_stream(3alleg5) when a new stream is created.

       al_get_audio_stream_fragments - Allegro 5 API

al_get_available_audio_stream_fragments(3alleg5)

Allegro reference manual                                                  al_get_audio_stream_fragments(3alleg5)

              #include <allegro5/allegro_audio.h>

              unsigned int al_get_audio_stream_fragments(const ALLEGRO_AUDIO_STREAM *stream)