3dtours
2eb327056d
- midiExtractor.js: extractSelectedMIDIContext with note name conversion - aiGateway.js: REARRANGE_TOOL_SPEC + buildRearrangeMessage - dawCommandDispatcher.js: register REARRANGE_MIDI_MELODY command - app.jsx: handleAISend detects selected MIDI item → rearrange flow - rearrangeMidiMelody handler places A/B track below source track
61 lines
2.1 KiB
JavaScript
61 lines
2.1 KiB
JavaScript
const SonicMidiExtractor = (function() {
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const NOTE_NAMES = ['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];
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function midiPitchToNoteName(pitch) {
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const note = NOTE_NAMES[pitch % 12];
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const octave = Math.floor(pitch / 12) - 1;
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return note + octave;
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}
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function extractSelectedMIDIContext(tracks, selectedItemId, bpm) {
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let targetItem = null;
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let targetTrack = null;
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for (const track of tracks) {
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const items = track.midiItems || [];
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const item = items.find(i => i.id === selectedItemId);
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if (item) { targetItem = item; targetTrack = track; break; }
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}
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if (!targetItem) {
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throw new Error('Please select a MIDI Item on the Timeline before requesting a Rearrangement!');
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}
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const notes = targetItem.notes || [];
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if (notes.length === 0) {
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throw new Error('Selected MIDI item has no notes to rearrange.');
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}
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const compactNotes = notes.map(n => ({
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pitch: n.pitch,
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note_name: midiPitchToNoteName(n.pitch),
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start_beat: parseFloat((n.start_beat || 0).toFixed(2)),
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duration_beats: parseFloat((n.duration_beats || 1).toFixed(2)),
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velocity: parseFloat((n.velocity || 0.8).toFixed(2))
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}));
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const totalDurationBeats = compactNotes.reduce((max, n) => Math.max(max, n.start_beat + n.duration_beats), 0);
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return {
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track_name: targetTrack.name,
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track_id: targetTrack.id,
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item_id: targetItem.id,
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item_name: targetItem.name,
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duration_bars: targetItem.length_bars || Math.ceil(totalDurationBeats / 4),
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total_beats: Math.ceil(totalDurationBeats),
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bpm: parseInt(bpm || '120'),
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total_notes: compactNotes.length,
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notes: compactNotes,
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instrument: targetTrack.synth_engine ? {
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soundfont_id: targetTrack.synth_engine.soundfont_id || '',
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soundfont_bank: targetTrack.synth_engine.soundfont_bank ?? 0,
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soundfont_program: targetTrack.synth_engine.soundfont_program ?? 0
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} : null
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};
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}
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return { extractSelectedMIDIContext, midiPitchToNoteName };
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})();
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window.SonicMidiExtractor = SonicMidiExtractor;
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