detect_midi_driver man page

detect_midi_driver — Detects whether the specified MIDI sound device is available. Allegro game programming library.

Synopsis

#include <allegro.h>

int detect_midi_driver(int driver_id);

Description

Detects whether the specified MIDI sound device is available. This function must be called _before_ install_sound().

Return Value

Returns the maximum number of voices that the driver can provide, or zero if the hardware is not present.

There are two special-case return values that you should watch out for: if this function returns -1 it is a note-stealing driver (eg. DIGMID) that shares voices with the current digital sound driver, and if it returns 0xFFFF it is an external device like an MPU-401 where there is no way to determine how many voices are available.

See Also

install_sound(3), reserve_voices(3)

Referenced By

install_sound(3), reserve_voices(3), set_volume_per_voice(3).

version 4.4.2 Allegro Allegro manual