Convert midi to words

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "bad-apple"
+version = "0.1.0"
+dependencies = [
+ "midly",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
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+
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+
+[[package]]
+name = "midly"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "207d755f4cb882d20c4da58d707ca9130a0c9bc5061f657a4f299b8e36362b7a"
+dependencies = [
+ "rayon",
+]
+
+[[package]]
+name = "rayon"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]

Cargo.toml

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+[package]
+name = "bad-apple"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+midly = "0.5.3"

src/main.rs

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+use std::fs;
+
+use midly::Smf;
+
+const FILENAME: &str = "media/TOUHOU - Bad Apple!!.mid";
+
+fn get_u32(bits: &[bool; 32]) -> u32 {
+    let mut result = 0u32;
+    for (i, &bit) in bits.iter().enumerate() {
+        if bit {
+            result |= 1 << (31 - i);
+        }
+    }
+    return result;
+}
+
+fn main() {
+    let bytes = fs::read(FILENAME).expect("Failed to read input file!");
+    let smf = Smf::parse(&bytes).unwrap();
+
+    let mut current_on = [false; 32];
+
+    let track = &smf.tracks[0];
+    print!("const DATA: &[u32] = &[");
+    for (_, event) in track.iter().enumerate() {
+        // println!("{}", event.delta);
+        let mut delta = event.delta.as_int();
+        while delta >= 96 {
+            delta -= 96;
+            let word = get_u32(&current_on);
+            print!("0x{:x},", word);
+        }
+        match event.kind {
+            midly::TrackEventKind::Midi { channel: _, message } => match message {
+                midly::MidiMessage::NoteOff { key, vel: _ } => {
+                    let index = key.as_int() as isize - 59;
+                    if index >= 0 && index < 32 {
+                        current_on[index as usize] = false;
+                    }
+                }
+                midly::MidiMessage::NoteOn { key, vel: _ } => {
+                    let index = key.as_int() as isize - 59;
+                    if index >= 0 && index < 32 {
+                        current_on[index as usize] = true;
+                    }
+                }
+                _ => {
+                    // println!("event {}: {:?}", i, message);
+                }
+            },
+            _ => {
+                // println!("event {}: {:?}", i, event);
+            }
+        }
+    }
+    println!("];");
+    // for (i, track) in smf.tracks.iter().enumerate() {
+    //     println!("track {} has {} events", i, track.len());
+    // }
+}