feat: use cached annotations on subtitle change and skip pre-warmed cues (#97)

src/core/services/subtitle-processing-controller.ts

@@ -13,10 +13,11 @@ export interface SubtitleProcessingController {
   invalidateTokenizationCache: () => void;
   preCacheTokenization: (text: string, data: SubtitleData) => void;
   consumeCachedSubtitle: (text: string) => SubtitleData | null;
+  hasCachedSubtitle: (text: string) => boolean;
   isCacheFull: () => boolean;
 }
 
-function normalizeSubtitleCacheKey(text: string): string {
+export function normalizeSubtitleCacheKey(text: string): string {
   return text.replace(/\r\n/g, '\n').replace(/\\N/g, '\n').replace(/\\n/g, '\n').trim();
 }
 
@@ -152,6 +153,9 @@ export function createSubtitleProcessingController(
       refreshRequested = false;
       return cached;
     },
+    hasCachedSubtitle: (text: string) => {
+      return tokenizationCache.has(normalizeSubtitleCacheKey(text));
+    },
     isCacheFull: () => {
       return tokenizationCache.size >= SUBTITLE_TOKENIZATION_CACHE_LIMIT;
     },