feat(dialogues): support multi-cue subtitles

src/types/dialogues/dialogues.ts

@@ -13,7 +13,8 @@ export interface DialogueDefinition {
   id: string;
   voice: DialogueVoiceId;
   audio: string;
-  subtitleCueIndex: number;
+  subtitleCueIndex?: number;
+  subtitleCueIndices?: number[];
   timecode?: number;
 }
 
@@ -22,3 +23,20 @@ export interface DialogueManifest {
   voices: DialogueVoice[];
   dialogues: DialogueDefinition[];
 }
+
+export function getDialogueCueIndices(dialogue: DialogueDefinition): number[] {
+  if (dialogue.subtitleCueIndices && dialogue.subtitleCueIndices.length > 0) {
+    return dialogue.subtitleCueIndices;
+  }
+  if (dialogue.subtitleCueIndex !== undefined) {
+    return [dialogue.subtitleCueIndex];
+  }
+  return [];
+}
+
+export function getDialogueFirstCueIndex(
+  dialogue: DialogueDefinition,
+): number | undefined {
+  const indices = getDialogueCueIndices(dialogue);
+  return indices[0];
+}