Feat : Skills

open-sse/handlers/ttsProviders/openrouter.js

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+// OpenRouter TTS — via chat completions + audio modality (SSE stream)
+export default {
+  async synthesize(text, model, credentials) {
+    if (!credentials?.apiKey) throw new Error("No OpenRouter API key configured");
+
+    // model format: "tts-model/voice" e.g. "openai/gpt-4o-mini-tts/alloy"
+    let ttsModel = "openai/gpt-4o-mini-tts";
+    let voice = "alloy";
+    if (model && model.includes("/")) {
+      const lastSlash = model.lastIndexOf("/");
+      const maybVoice = model.slice(lastSlash + 1);
+      const maybeModel = model.slice(0, lastSlash);
+      if (maybeModel.includes("/")) {
+        ttsModel = maybeModel;
+        voice = maybVoice;
+      } else {
+        voice = model;
+      }
+    } else if (model) {
+      voice = model;
+    }
+
+    const res = await fetch("https://openrouter.ai/api/v1/chat/completions", {
+      method: "POST",
+      headers: {
+        "Content-Type": "application/json",
+        "Authorization": `Bearer ${credentials.apiKey}`,
+        "HTTP-Referer": "https://endpoint-proxy.local",
+        "X-Title": "Endpoint Proxy",
+      },
+      body: JSON.stringify({
+        model: ttsModel,
+        modalities: ["text", "audio"],
+        audio: { voice, format: "wav" },
+        stream: true,
+        messages: [{ role: "user", content: text }],
+      }),
+    });
+
+    if (!res.ok) {
+      const err = await res.json().catch(() => ({}));
+      throw new Error(err?.error?.message || `OpenRouter TTS failed: ${res.status}`);
+    }
+
+    // Parse SSE stream, accumulate base64 audio chunks
+    const chunks = [];
+    const reader = res.body.getReader();
+    const decoder = new TextDecoder();
+    let buffer = "";
+
+    while (true) {
+      const { done, value } = await reader.read();
+      if (done) break;
+      buffer += decoder.decode(value, { stream: true });
+      const lines = buffer.split("\n");
+      buffer = lines.pop();
+      for (const line of lines) {
+        if (!line.startsWith("data: ") || line === "data: [DONE]") continue;
+        try {
+          const json = JSON.parse(line.slice(6));
+          const audioData = json.choices?.[0]?.delta?.audio?.data;
+          if (audioData) chunks.push(audioData);
+        } catch {}
+      }
+    }
+
+    if (chunks.length === 0) throw new Error("OpenRouter TTS returned no audio data");
+    return { base64: chunks.join(""), format: "wav" };
+  },
+};