midi_pos(3)

💖 midi_pos(3) 💖

okay so bestie, welcome to the Allegro manual — yes that Allegro, the game programming library, and today's main character is a little variable called midi_pos. she's tiny. she's volatile. she's lowkey carrying your whole soundtrack-synced animation. let's get into it 🎀

✨ NAME ✨

midi_pos — stores the current position in the MIDI file. part of the Allegro game programming library. periodt.

🌸 SYNOPSIS 🌸

#include <allegro.h>

extern volatile long midi_pos;

like. that's it. that's the whole entrance. no args, no return value, she's just there, existing, being extern and volatile and iconic 💅

🦋 DESCRIPTION 🦋

so here's the tea: midi_pos stores the current position — that's the beat number — inside the MIDI file that's playing rn.

and if there's no music playing at all? she goes negative. not zero, not blank, negative. that's your "nobody's on stage rn" signal, no cap 😭

why do you care, you ask? two very valid reasons, bestie:

• it's useful for synchronising animations with the music — your little sprite bopping on the beat? yeah, that's her. she's the metronome. she's the vibe check.
• it's useful for checking whether a MIDI file has finished playing — because once the song's done, she's not gonna be sitting there at some nice friendly number.

⚠️ okay important: she's declared volatile for a reason, so don't go caching her in a local variable and then acting surprised when the music moves on without you. she changes behind your back. that's the whole point. 🫶

👑 SEE ALSO 👑

the girlies she runs with:

• play_midi(3) — the one who actually starts the music she's tracking
• midi_msg_callback(3) — for when you want the messages themselves, not just the position
• exmidi(3) — the example, go look at it, it's giving tutorial energy ⭐

Allegro, version 4.4.3 — mwah, ty for coming to my ted talk, go sync something pretty to a beat and remember: negative means silence, and silence is also a vibe 🌈💜