f13eb05218
TTS: prefix model with openai/ so LiteLLM routes correctly Email: horizontal rules instead of card border, spacious padding, wordmark + divider + body + divider + footer. Reads like a doc. TTS: tts-1 becomes openai/tts-1 automatically unless already prefixed.
85 lines
3.9 KiB
JavaScript
85 lines
3.9 KiB
JavaScript
const express = require('express');
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const router = express.Router();
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const axios = require('axios');
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const { synthesizeWithGoogleTTS, isGoogleTTSConfigured } = require('../utils/ttsGoogle');
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const { authMiddleware } = require('../middleware/auth');
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// Provider priority (auto-detect):
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// TTS_PROVIDER=google → Google Cloud TTS direct (HIPAA eligible)
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// TTS_PROVIDER=litellm → LiteLLM proxy
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// TTS_PROVIDER=elevenlabs → ElevenLabs (not HIPAA)
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// Auto: google > litellm > elevenlabs
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function getTTSProvider() {
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var env = process.env.TTS_PROVIDER;
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if (env === 'google') return 'google';
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if (env === 'litellm') return 'litellm';
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if (env === 'elevenlabs') return 'elevenlabs';
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// Auto-detect: litellm > google > elevenlabs
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// LiteLLM Vertex TTS works correctly via alias (tts-1)
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if (process.env.LITELLM_API_BASE) return 'litellm';
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if (isGoogleTTSConfigured()) return 'google';
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if (process.env.ELEVENLABS_API_KEY) return 'elevenlabs';
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return 'none';
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}
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var ttsProvider = getTTSProvider();
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console.log('🔊 TTS provider:', ttsProvider +
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(ttsProvider === 'google' ? ' (voice: ' + (process.env.GOOGLE_TTS_VOICE || 'en-US-Journey-F') + ')' : ''));
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router.post('/text-to-speech', authMiddleware, async (req, res) => {
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try {
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var text = (req.body.text || '').substring(0, 5000);
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if (!text) return res.status(400).json({ error: 'No text provided' });
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if (ttsProvider === 'google') {
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var buffer = await synthesizeWithGoogleTTS(text);
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res.set('Content-Type', 'audio/mpeg');
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res.set('X-TTS-Provider', 'google-tts');
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return res.send(buffer);
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}
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if (ttsProvider === 'litellm') {
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if (!process.env.LITELLM_API_BASE) return res.status(400).json({ error: 'LITELLM_API_BASE not set.' });
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// Use the full model path (e.g. vertex_ai/google-tts) or the model_name alias
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// from your LiteLLM model_list. Full path is safer if your config uses it directly.
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// Prefix with openai/ so LiteLLM routes correctly to the TTS endpoint
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var rawModel = process.env.LITELLM_TTS_MODEL || 'tts-1';
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var ttsModel = rawModel.indexOf('/') === -1 ? 'openai/' + rawModel : rawModel;
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var ttsVoice = process.env.LITELLM_TTS_VOICE || 'en-US-Journey-F';
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var base = process.env.LITELLM_API_BASE.replace(/\/+$/, '');
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var ttsHeaders = { 'Content-Type': 'application/json' };
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if (process.env.LITELLM_API_KEY) ttsHeaders['Authorization'] = 'Bearer ' + process.env.LITELLM_API_KEY;
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var ttsResp = await axios.post(base + '/v1/audio/speech',
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{ model: ttsModel, voice: ttsVoice, input: text },
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{ headers: ttsHeaders, responseType: 'arraybuffer', timeout: 60000 }
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);
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res.set('Content-Type', 'audio/mpeg');
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res.set('X-TTS-Provider', 'litellm/' + ttsModel);
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return res.send(Buffer.from(ttsResp.data));
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}
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if (ttsProvider === 'elevenlabs') {
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if (!process.env.ELEVENLABS_API_KEY) return res.status(400).json({ error: 'ElevenLabs not configured' });
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var resp = await axios({
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method: 'POST',
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url: 'https://api.elevenlabs.io/v1/text-to-speech/pNInz6obpgDQGcFmaJgB',
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headers: { 'xi-api-key': process.env.ELEVENLABS_API_KEY, 'Content-Type': 'application/json' },
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data: { text: text, model_id: 'eleven_turbo_v2_5', voice_settings: { stability: 0.5, similarity_boost: 0.75 } },
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responseType: 'arraybuffer'
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});
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res.set('Content-Type', 'audio/mpeg');
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res.set('X-TTS-Provider', 'elevenlabs');
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return res.send(Buffer.from(resp.data));
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}
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res.status(400).json({ error: 'TTS not configured. Set GOOGLE_VERTEX_PROJECT, LITELLM_API_BASE, or ELEVENLABS_API_KEY.' });
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} catch (err) {
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var detail = err.response && err.response.data
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? JSON.stringify(err.response.data).substring(0, 500)
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: err.message;
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console.error('[TTS] Error (' + ttsProvider + '):', detail);
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res.status(500).json({ error: 'TTS failed: ' + detail });
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}
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});
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module.exports = router;
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