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//! MusicXML embedding logic for build.rs and other tools
// Extracts MusicXML timelines and metadata for static embedding
// Update the path below if these types are defined elsewhere, e.g., in a module named 'model' or 'common'.
// use crate::model::{SongInfo, TrackInfo, Note, SongType};
// use crate::common::{SongInfo, TrackInfo, Note, SongType};
// If not present, create a types.rs file in src/ with the required definitions and add:
use crate::types::{XmlSongInfo, XmlTrackInfo};
use musicxml::read_score_partwise;
use quick_xml::events::Event;
use quick_xml::Reader;
use std::collections::HashMap;
use std::fs;
use std::io::BufReader;
use std::path::Path;
pub fn extract_musicxml_songs(xml_dir: &Path) -> Vec<XmlSongInfo> {
let mut songs = Vec::new();
if xml_dir.exists() {
for entry in fs::read_dir(xml_dir).unwrap() {
let entry = entry.unwrap();
let path = entry.path();
// Only process .xml files
if path.extension().and_then(|s| s.to_str()) == Some("xml") {
// Use quick-xml to extract part id -> (name, program) mapping
let part_map = extract_part_list_mapping(&path);
eprintln!(
"[DEBUG] MusicXML part mapping for {:?}:",
path.file_name().unwrap()
);
for (pid, (name, prog)) in &part_map {
eprintln!(
" part_id: {} name: '{}' midi_program: {}",
pid, name, prog
);
}
let score = match read_score_partwise(path.to_str().unwrap()) {
Ok(s) => s,
Err(_) => continue,
};
let mut track_infos = Vec::new();
let mut all_track_notes = Vec::new();
let default_tempo = 120u32;
let mut part_idx = 0;
let mut ticks_per_q = 1u32;
for part in &score.content.part {
// Get part id from attributes
let part_id = part.attributes.id.0.clone();
// Look up instrument name/program from mapping
let (instrument_name, program) = part_map
.get(&part_id)
.map(|(n, p)| (n.clone(), *p))
.unwrap_or_else(|| (format!("Part{}", part_idx), 0));
eprintln!(
"[DEBUG] Assigning part_id '{}' -> '{}' (program {})",
part_id, instrument_name, program
);
let mut note_count = 0;
let mut min_pitch = 127u8;
let mut max_pitch = 0u8;
let mut sample_notes = Vec::new();
let mut timeline = Vec::new();
let mut current_time = 0u32;
let mut divisions = 1u32;
// Find divisions from the first measure with attributes
for elem in &part.content {
if let musicxml::elements::PartElement::Measure(measure) = elem {
for m_elem in &measure.content {
if let musicxml::elements::MeasureElement::Attributes(attr) = m_elem
{
if let Some(div) = &attr.content.divisions {
divisions = div.content.0 as u32;
}
}
}
break;
}
}
if part_idx == 0 {
ticks_per_q = divisions;
}
// Now process all measures and notes
for elem in &part.content {
if let musicxml::elements::PartElement::Measure(measure) = elem {
let mut local_time = current_time;
for m_elem in &measure.content {
if let musicxml::elements::MeasureElement::Note(note) = m_elem {
if let musicxml::elements::NoteType::Normal(ref normal) =
note.content.info
{
if let musicxml::elements::AudibleType::Pitch(ref pitch) =
normal.audible
{
let step_val = step_to_midi(&pitch.content.step);
let octave_val = pitch.content.octave.content.0 as u8;
let alter_val = pitch
.content
.alter
.as_ref()
.map(|a| a.content.0 as i8)
.unwrap_or(0);
let midi_pitch = (step_val as i8
+ alter_val
+ ((octave_val as i8 + 1) * 12))
as u8;
let duration = normal.duration.content.0 as u32;
let velocity = 64u8;
// Use the MusicXML voice field if present, otherwise default to 1
let voice = note
.content
.voice
.as_ref()
.and_then(|v| {
v.content.to_string().parse::<u8>().ok()
})
.unwrap_or(1u8);
timeline.push((
local_time, duration, voice, midi_pitch, velocity,
));
if midi_pitch < min_pitch {
min_pitch = midi_pitch;
}
if midi_pitch > max_pitch {
max_pitch = midi_pitch;
}
if sample_notes.len() < 5 {
sample_notes.push(midi_pitch);
}
note_count += 1;
local_time += duration;
}
}
}
}
current_time = local_time;
}
}
// Assign default channel 0 if none specified (MusicXML usually doesn't specify channels)
let mut channels = Vec::new();
// If you ever parse real channel info, push it here. For now, always push 0.
channels.push(0);
track_infos.push(XmlTrackInfo {
index: part_idx,
name: instrument_name,
note_count,
pitch_range: (min_pitch, max_pitch),
sample_notes,
program,
channels,
});
all_track_notes.push(timeline);
part_idx += 1;
}
let filename = path.file_name().unwrap().to_str().unwrap().to_string();
let song_name = filename.replace(".xml", "").replace("_", " ");
songs.push(XmlSongInfo {
filename,
name: song_name,
tracks: track_infos,
default_tempo,
ticks_per_q,
track_notes: all_track_notes,
});
}
}
}
songs
}
// Helper for step to midi number
fn step_to_midi(step: &dyn std::fmt::Debug) -> u8 {
let s = format!("{:?}", step);
match s.as_str() {
"C" => 0,
"D" => 2,
"E" => 4,
"F" => 5,
"G" => 7,
"A" => 9,
"B" => 11,
_ => 0,
}
}
fn instrument_name_to_program(name: &str) -> u8 {
// General MIDI mapping (add more as needed)
match name.to_ascii_lowercase().as_str() {
"acoustic grand piano" | "piano" => 0,
"bright acoustic piano" => 1,
"electric grand piano" => 2,
"honky-tonk piano" => 3,
"electric piano 1" | "rhodes" => 4,
"electric piano 2" => 5,
"harpsichord" => 6,
"clavinet" => 7,
"celesta" => 8,
"glockenspiel" => 9,
"music box" => 10,
"vibraphone" => 11,
"marimba" => 12,
"xylophone" => 13,
"tubular bells" => 14,
"dulcimer" => 15,
"drawbar organ" => 16,
"percussive organ" => 17,
"rock organ" => 18,
"church organ" | "organ" => 19,
"reed organ" => 20,
"accordion" => 21,
"harmonica" => 22,
"tango accordion" => 23,
"guitar" | "acoustic guitar" => 24,
"electric guitar (jazz)" => 26,
"electric guitar (clean)" => 27,
"electric guitar (muted)" => 28,
"overdriven guitar" => 29,
"distortion guitar" => 30,
"guitar harmonics" => 31,
"acoustic bass" => 32,
"electric bass (finger)" => 33,
"electric bass (pick)" => 34,
"fretless bass" => 35,
"slap bass 1" => 36,
"slap bass 2" => 37,
"synth bass 1" => 38,
"synth bass 2" => 39,
"violin" => 40,
"viola" => 41,
"cello" | "violoncello" => 42,
"contrabass" | "double bass" => 43,
"tremolo strings" => 44,
"pizzicato strings" => 45,
"orchestral harp" => 46,
"timpani" => 47,
"string ensemble 1" => 48,
"string ensemble 2" => 49,
"synth strings 1" => 50,
"synth strings 2" => 51,
"choir aahs" => 52,
"voice oohs" => 53,
"synth voice" => 54,
"orchestra hit" => 55,
"trumpet" => 56,
"trombone" => 57,
"tuba" => 58,
"muted trumpet" => 59,
"french horn" | "horn" => 60,
"brass section" => 61,
"synth brass 1" => 62,
"synth brass 2" => 63,
"soprano sax" => 64,
"alto sax" => 65,
"tenor sax" => 66,
"baritone sax" => 67,
"oboe" => 68,
"english horn" => 69,
"bassoon" => 70,
"clarinet" => 71,
"piccolo" => 72,
"flute" => 73,
"recorder" => 74,
"pan flute" => 75,
"blown bottle" => 76,
"shakuhachi" => 77,
"whistle" => 78,
"ocarina" => 79,
"lead 1 (square)" => 80,
"lead 2 (sawtooth)" => 81,
"lead 3 (calliope)" => 82,
"lead 4 (chiff)" => 83,
"lead 5 (charang)" => 84,
"lead 6 (voice)" => 85,
"lead 7 (fifths)" => 86,
"lead 8 (bass + lead)" => 87,
"pad 1 (new age)" => 88,
"pad 2 (warm)" => 89,
"pad 3 (polysynth)" => 90,
"pad 4 (choir)" => 91,
"pad 5 (bowed)" => 92,
"pad 6 (metallic)" => 93,
"pad 7 (halo)" => 94,
"pad 8 (sweep)" => 95,
"fx 1 (rain)" => 96,
"fx 2 (soundtrack)" => 97,
"fx 3 (crystal)" => 98,
"fx 4 (atmosphere)" => 99,
"fx 5 (brightness)" => 100,
"fx 6 (goblins)" => 101,
"fx 7 (echoes)" => 102,
"fx 8 (sci-fi)" => 103,
"sitar" => 104,
"banjo" => 105,
"shamisen" => 106,
"koto" => 107,
"kalimba" => 108,
"bag pipe" => 109,
"fiddle" => 110,
"shanai" => 111,
"tinkle bell" => 112,
"agogo" => 113,
"steel drums" => 114,
"woodblock" => 115,
"taiko drum" => 116,
"melodic tom" => 117,
"synth drum" => 118,
"reverse cymbal" => 119,
"guitar fret noise" => 120,
"breath noise" => 121,
"seashore" => 122,
"bird tweet" => 123,
"telephone ring" => 124,
"helicopter" => 125,
"applause" => 126,
"gunshot" => 127,
// Add more mappings as needed
_ => 0, // Default to Acoustic Grand Piano
}
}
/// Extracts a mapping from part id to (instrument name, MIDI program) from the <part-list> section of a MusicXML file.
pub fn extract_part_list_mapping(xml_path: &Path) -> HashMap<String, (String, u8)> {
let mut mapping = HashMap::new();
let file = match std::fs::File::open(xml_path) {
Ok(f) => f,
Err(_) => return mapping,
};
let mut reader = Reader::from_reader(BufReader::new(file));
let mut buf = Vec::new();
let mut in_part_list = false;
let mut in_score_part = false;
let mut current_id = None;
let mut current_name = None;
let mut current_virtual_name = None;
loop {
match reader.read_event_into(&mut buf) {
Ok(Event::Start(ref e)) => match e.name().as_ref() {
b"part-list" => in_part_list = true,
b"score-part" if in_part_list => {
in_score_part = true;
current_id = e
.attributes()
.filter_map(|a| a.ok())
.find(|a| a.key.as_ref() == b"id")
.and_then(|a| std::str::from_utf8(&a.value).ok().map(|s| s.to_string()));
current_name = None;
current_virtual_name = None;
}
b"part-name" if in_score_part => {
if let Ok(Event::Text(t)) = reader.read_event_into(&mut buf) {
let name = t.escape_ascii().to_string();
current_name = Some(name.trim().to_string());
}
}
b"virtual-name" if in_score_part => {
if let Ok(Event::Text(t)) = reader.read_event_into(&mut buf) {
let vname = t.escape_ascii().to_string();
current_virtual_name = Some(vname.trim().to_string());
}
}
_ => {}
},
Ok(Event::End(ref e)) => {
match e.name().as_ref() {
b"score-part" if in_score_part => {
if let Some(id) = current_id.take() {
// Prefer part-name if it maps to a known program, else try virtual-name
let mut name =
current_name.take().unwrap_or_else(|| "Unknown".to_string());
let mut program = instrument_name_to_program(&name);
if program == 0 && name.to_ascii_lowercase() != "acoustic grand piano" {
if let Some(vname) = current_virtual_name.take() {
let vprog = instrument_name_to_program(&vname);
if vprog != 0 || vname.to_ascii_lowercase() == "flute" {
name = vname;
program = vprog;
}
}
}
mapping.insert(id, (name, program));
}
in_score_part = false;
}
b"part-list" => break,
_ => {}
}
}
Ok(Event::Eof) => break,
_ => {}
}
buf.clear();
}
mapping
}
// --- Conversion helper: XmlSongInfo -> SongInfo/Note (for main player integration) ---
// Types are available in the crate root; no import needed.
// All MusicXML logic moved to musicxml.rs