Release MIDI Tools 0.2.0

2026-09-02 09:14:48 +02:00
parent 4b51a6d903
commit 06e095a2eb
40 changed files with 1581 additions and 126 deletions
@@ -0,0 +1,91 @@
+import {
+  constantTempoMidi,
+  cropMidi,
+  deleteNote,
+  editNote,
+  dropChannel,
+  encodeMidi,
+  exportMidiCsv,
+  exportMidiJson,
+  parseMidi,
+  quantizeMidi,
+  remapChannel,
+  transposeMidi,
+  type MidiDocument,
+} from "./midi";
+
+export type MidiOperation =
+  | { kind: "transpose"; semitones: number }
+  | { kind: "quantize"; grid: number }
+  | { kind: "tempo"; bpm: number }
+  | { kind: "crop"; start: number; end: number }
+  | { kind: "remap-channel"; from: number; to: number }
+  | { kind: "drop-channel"; channel: number }
+  | {
+      kind: "edit-note";
+      onOrder: number;
+      note: number;
+      velocity: number;
+      startTick: number;
+      endTick: number;
+    }
+  | { kind: "delete-note"; onOrder: number };
+
+export type MidiTask =
+  | { kind: "parse"; name: string; bytes: ArrayBuffer }
+  | { kind: "operation"; document: MidiDocument; operation: MidiOperation }
+  | {
+      kind: "export";
+      document: MidiDocument;
+      format: "midi" | "csv" | "json";
+    };
+
+export type MidiTaskResult =
+  | { kind: "document"; document: MidiDocument }
+  | { kind: "bytes"; bytes: ArrayBuffer; mimeType: string }
+  | { kind: "text"; text: string; mimeType: string };
+
+/** Pure task entry point shared by the module worker and test fallback. */
+export function executeMidiTask(task: MidiTask): MidiTaskResult {
+  if (task.kind === "parse")
+    return {
+      kind: "document",
+      document: parseMidi(task.name, new Uint8Array(task.bytes)),
+    };
+  if (task.kind === "operation") {
+    const { document, operation } = task;
+    const next =
+      operation.kind === "transpose"
+        ? transposeMidi(document, operation.semitones)
+        : operation.kind === "quantize"
+          ? quantizeMidi(document, operation.grid)
+          : operation.kind === "tempo"
+            ? constantTempoMidi(document, operation.bpm)
+            : operation.kind === "crop"
+              ? cropMidi(document, operation.start, operation.end)
+              : operation.kind === "remap-channel"
+                ? remapChannel(document, operation.from, operation.to)
+                : operation.kind === "drop-channel"
+                  ? dropChannel(document, operation.channel)
+                  : operation.kind === "edit-note"
+                    ? editNote(document, operation.onOrder, operation)
+                    : deleteNote(document, operation.onOrder);
+    return { kind: "document", document: next };
+  }
+  if (task.format === "midi") {
+    const bytes = encodeMidi(task.document);
+    return {
+      kind: "bytes",
+      bytes: Uint8Array.from(bytes).buffer,
+      mimeType: "audio/midi",
+    };
+  }
+  return {
+    kind: "text",
+    text:
+      task.format === "csv"
+        ? exportMidiCsv(task.document)
+        : exportMidiJson(task.document),
+    mimeType: task.format === "csv" ? "text/csv" : "application/json",
+  };
+}