feat: joel voiceover

2026-02-05 14:25:04 +01:00
parent 24b4c12e7d
commit 7dbe952929
6 changed files with 117 additions and 88 deletions
--- a/src/services/ai/voiceover.ts
+++ b/src/services/ai/voiceover.ts
@@ -14,91 +14,93 @@ const DEFAULT_STYLE = 0.25;
 const DEFAULT_SPEED = 1.20

 function clamp01(value: number): number {
-  return Math.max(0, Math.min(1, value));
+    return Math.max(0, Math.min(1, value));
 }

 export interface VoiceoverOptions {
-  text: string;
-  voiceId?: string;
-  modelId?: string;
-  stability?: number;
-  similarityBoost?: number;
-  style?: number;
-  speakerBoost?: boolean;
+    text: string;
+    voiceId?: string;
+    modelId?: string;
+    stability?: number;
+    similarityBoost?: number;
+    style?: number;
+    speakerBoost?: boolean;
+    speed?: number;
 }

 export class VoiceoverService {
-  async generate(options: VoiceoverOptions): Promise<Buffer> {
-    const apiKey = config.elevenlabs.apiKey;
-    if (!apiKey) {
-      throw new Error("Voiceover is not configured (missing ELEVENLABS_API_KEY).");
+    async generate(options: VoiceoverOptions): Promise<Buffer> {
+        const apiKey = config.elevenlabs.apiKey;
+        if (!apiKey) {
+            throw new Error("Voiceover is not configured (missing ELEVENLABS_API_KEY).");
+        }
+
+        const voiceId = options.voiceId || config.elevenlabs.voiceId;
+        if (!voiceId) {
+            throw new Error("Voiceover is missing a voice ID (set ELEVENLABS_VOICE_ID or pass one).");
+        }
+
+        const text = options.text.trim();
+        if (!text) {
+            throw new Error("Voiceover text is empty.");
+        }
+
+        const modelId = options.modelId || config.elevenlabs.modelId;
+
+        const voiceSettings = {
+            stability: clamp01(options.stability ?? DEFAULT_STABILITY),
+            similarity_boost: clamp01(options.similarityBoost ?? DEFAULT_SIMILARITY),
+            style: clamp01(options.style ?? DEFAULT_STYLE),
+            speed: options.speed ?? DEFAULT_SPEED,
+            use_speaker_boost: options.speakerBoost ?? true,
+        };
+
+        const url = new URL(`https://api.elevenlabs.io/v1/text-to-speech/${voiceId}/stream`);
+        url.searchParams.set("output_format", DEFAULT_OUTPUT_FORMAT);
+
+        logger.debug("Generating voiceover", {
+            textLength: text.length,
+            voiceId,
+            modelId,
+        });
+
+        const response = await fetch(url.toString(), {
+            method: "POST",
+            headers: {
+                "xi-api-key": apiKey,
+                "Content-Type": "application/json",
+                "Accept": "audio/mpeg",
+            },
+            body: JSON.stringify({
+                text,
+                model_id: modelId,
+                voice_settings: voiceSettings,
+            }),
+        });
+
+        if (!response.ok) {
+            const errorBody = await response.text();
+            logger.error("ElevenLabs API error", {
+                status: response.status,
+                body: errorBody.slice(0, 300),
+            });
+            throw new Error(`ElevenLabs API error (HTTP ${response.status}).`);
+        }
+
+        const audioBuffer = await response.arrayBuffer();
+        return Buffer.from(audioBuffer);
    }

-    const voiceId = options.voiceId || config.elevenlabs.voiceId;
-    if (!voiceId) {
-      throw new Error("Voiceover is missing a voice ID (set ELEVENLABS_VOICE_ID or pass one).");
+    async health(): Promise<boolean> {
+        return !!config.elevenlabs.apiKey;
    }
-
-    const text = options.text.trim();
-    if (!text) {
-      throw new Error("Voiceover text is empty.");
-    }
-
-    const modelId = options.modelId || config.elevenlabs.modelId;
-
-    const voiceSettings = {
-      stability: clamp01(options.stability ?? DEFAULT_STABILITY),
-      similarity_boost: clamp01(options.similarityBoost ?? DEFAULT_SIMILARITY),
-      style: clamp01(options.style ?? DEFAULT_STYLE),
-      use_speaker_boost: options.speakerBoost ?? true,
-    };
-
-    const url = new URL(`https://api.elevenlabs.io/v1/text-to-speech/${voiceId}/stream`);
-    url.searchParams.set("output_format", DEFAULT_OUTPUT_FORMAT);
-
-    logger.debug("Generating voiceover", {
-      textLength: text.length,
-      voiceId,
-      modelId,
-    });
-
-    const response = await fetch(url.toString(), {
-      method: "POST",
-      headers: {
-        "xi-api-key": apiKey,
-        "Content-Type": "application/json",
-        "Accept": "audio/mpeg",
-      },
-      body: JSON.stringify({
-        text,
-        model_id: modelId,
-        voice_settings: voiceSettings,
-      }),
-    });
-
-    if (!response.ok) {
-      const errorBody = await response.text();
-      logger.error("ElevenLabs API error", {
-        status: response.status,
-        body: errorBody.slice(0, 300),
-      });
-      throw new Error(`ElevenLabs API error (HTTP ${response.status}).`);
-    }
-
-    const audioBuffer = await response.arrayBuffer();
-    return Buffer.from(audioBuffer);
-  }
-
-  async health(): Promise<boolean> {
-    return !!config.elevenlabs.apiKey;
-  }
 }

 let voiceoverService: VoiceoverService | null = null;

 export function getVoiceoverService(): VoiceoverService {
-  if (!voiceoverService) {
-    voiceoverService = new VoiceoverService();
-  }
-  return voiceoverService;
+    if (!voiceoverService) {
+        voiceoverService = new VoiceoverService();
+    }
+    return voiceoverService;
 }