电子书馆增加听书功能

src/app/api/books/tts/synthesize/route.ts

@@ -0,0 +1,52 @@
+import { NextRequest, NextResponse } from 'next/server';
+
+import { getBookTtsConfig, synthesizeBookTts } from '@/lib/book-tts';
+
+import { getAuthorizedBooksUsername } from '../../_utils';
+
+export const runtime = 'nodejs';
+
+type SynthesizePayload = {
+  sourceId?: string;
+  bookId?: string;
+  chapterHref?: string;
+  text?: string;
+  voice?: string;
+  rate?: string;
+  pitch?: string;
+  volume?: string;
+};
+
+export async function POST(request: NextRequest) {
+  const username = await getAuthorizedBooksUsername(request);
+  if (username instanceof NextResponse) return username;
+
+  try {
+    const config = await getBookTtsConfig();
+    const payload = await request.json() as SynthesizePayload;
+    if (!payload.sourceId?.trim() || !payload.bookId?.trim() || !payload.chapterHref?.trim()) {
+      return NextResponse.json({ error: '缺少 sourceId / bookId / chapterHref' }, { status: 400 });
+    }
+
+    const result = await synthesizeBookTts({
+      sourceId: payload.sourceId.trim(),
+      bookId: payload.bookId.trim(),
+      chapterHref: payload.chapterHref.trim(),
+      text: payload.text?.trim() || '',
+      voice: payload.voice?.trim() || config.defaultVoice,
+      rate: payload.rate?.trim() || config.defaultRate,
+      pitch: payload.pitch?.trim() || config.defaultPitch,
+      volume: payload.volume?.trim() || config.defaultVolume,
+    });
+
+    return NextResponse.json({
+      audioBase64: result.audioBuffer.toString('base64'),
+      mimeType: result.mimeType,
+      boundaries: result.boundaries,
+      cacheKey: result.cacheKey,
+      cacheHit: result.cacheHit,
+    });
+  } catch (error) {
+    return NextResponse.json({ error: (error as Error).message || '语音合成失败' }, { status: 500 });
+  }
+}

src/app/api/books/tts/voices/route.ts

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+import { NextRequest, NextResponse } from 'next/server';
+
+import { getBookTtsConfig, listBookTtsVoices } from '@/lib/book-tts';
+
+import { getAuthorizedBooksUsername } from '../../_utils';
+
+export const runtime = 'nodejs';
+
+export async function GET(request: NextRequest) {
+  const username = await getAuthorizedBooksUsername(request);
+  if (username instanceof NextResponse) return username;
+
+  try {
+    const config = await getBookTtsConfig();
+    const voices = await listBookTtsVoices();
+    return NextResponse.json({
+      voices,
+      defaults: {
+        voice: config.defaultVoice,
+        rate: config.defaultRate,
+        pitch: config.defaultPitch,
+        volume: config.defaultVolume,
+        maxCharsPerChunk: config.maxCharsPerChunk,
+        prefetchChunks: config.prefetchChunks,
+        maxTextLengthPerRequest: config.maxTextLengthPerRequest,
+      },
+    });
+  } catch (error) {
+    return NextResponse.json({ error: (error as Error).message || '获取音色列表失败' }, { status: 500 });
+  }
+}