@stevekaplanai/google-ai-mcp
Version:
Model Context Protocol server for Google AI services (VEO 3, Imagen 4, Gemini, Lyria 2)
287 lines (285 loc) • 11.8 kB
JavaScript
;
/**
* Lyria 2 Music Generation Service
*
* CURRENT STATUS (July 2025):
* - Lyria 2 API is NOT publicly available through Google Cloud or AI Studio
* - This service operates in MOCK MODE only
* - Real API integration will be added when Google releases Lyria API
*
* WHERE LYRIA 2 EXISTS:
* - MusicFX (AI Test Kitchen): https://aitestkitchen.withgoogle.com/tools/music-fx
* - YouTube Dream Track (select creators only)
* - Google Labs experiments
*
* ALTERNATIVES FOR PRODUCTION USE:
* - MusicGen (Meta) via Replicate
* - Stable Audio (Stability AI)
* - AudioLDM2 via Hugging Face
*
* This implementation is ready for when Google releases the Lyria API.
* Expected model name patterns: musicgeneration@001, lyria@001, or similar
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.LyriaService = void 0;
const google_auth_library_1 = require("google-auth-library");
const base_service_js_1 = require("./base.service.js");
class LyriaService extends base_service_js_1.BaseGoogleService {
projectId;
location;
auth;
MAX_RETRIES = 3;
RETRY_DELAY = 1000;
constructor(config) {
super(config.apiKey || '', config);
this.projectId = config.projectId || process.env.GOOGLE_CLOUD_PROJECT || '';
this.location = config.location || process.env.GOOGLE_CLOUD_LOCATION || 'us-central1';
// Initialize auth if we have credentials
const credentials = process.env.GOOGLE_APPLICATION_CREDENTIALS_JSON;
if (credentials && !this.mockMode) {
try {
let parsedCredentials = JSON.parse(credentials);
if (parsedCredentials.private_key) {
parsedCredentials.private_key = parsedCredentials.private_key.replace(/\\n/g, '\n');
}
this.auth = new google_auth_library_1.GoogleAuth({
credentials: parsedCredentials,
scopes: ['https://www.googleapis.com/auth/cloud-platform']
});
}
catch (error) {
console.error('Failed to parse credentials:', error);
this.auth = null;
}
}
else {
this.auth = null;
}
}
async generateMusic(request) {
this.validateRequest(request);
if (this.mockMode) {
return this.generateMockResponse(request);
}
try {
return await this.executeWithRetry(() => this.callLyriaAPI(request));
}
catch (error) {
this.log('Failed to generate music', { error: error.message });
throw error;
}
}
validateRequest(request) {
if (!request.textPrompt || request.textPrompt.trim().length === 0) {
throw new Error('Text prompt is required');
}
if (request.durationSeconds) {
if (request.durationSeconds < 1 || request.durationSeconds > 60) {
throw new Error('Duration must be between 1 and 60 seconds');
}
}
const validStructures = ['verse-chorus', 'free-form', 'instrumental'];
if (request.musicalStructure && !validStructures.includes(request.musicalStructure)) {
throw new Error(`Invalid musical structure. Must be one of: ${validStructures.join(', ')}`);
}
const validTempos = ['slow', 'medium', 'fast'];
if (request.tempo && !validTempos.includes(request.tempo)) {
throw new Error(`Invalid tempo. Must be one of: ${validTempos.join(', ')}`);
}
}
async callLyriaAPI(request) {
const accessToken = await this.getAccessToken();
// Construct the request payload
// This is speculative - actual format will be determined when API is released
const payload = {
instances: [{
prompt: request.textPrompt,
...(request.genre && { genre: request.genre }),
...(request.mood && { mood: request.mood }),
}],
parameters: {
sampleCount: 1,
durationSeconds: request.durationSeconds || 30,
tempo: request.tempo || 'medium',
musicalStructure: request.musicalStructure || 'free-form',
...(request.outputStorageUri && { outputStorageUri: request.outputStorageUri }),
}
};
// Construct the endpoint
// Model name will need to be updated when Lyria API is released
const modelName = 'musicgeneration@001'; // Speculative - actual name TBD
const endpoint = `https://${this.location}-aiplatform.googleapis.com/v1/projects/${this.projectId}/locations/${this.location}/publishers/google/models/${modelName}:predict`;
this.log('Calling Lyria API', { endpoint, sampleCount: 1 });
const response = await fetch(endpoint, {
method: 'POST',
headers: {
'Authorization': `Bearer ${accessToken}`,
'Content-Type': 'application/json',
},
body: JSON.stringify(payload),
});
if (!response.ok) {
const errorText = await response.text();
this.log('Lyria API error', { status: response.status, statusText: response.statusText, response: errorText });
throw new Error(`Lyria generation failed: ${errorText}`);
}
const result = await response.json();
return this.processApiResponse(result, request, modelName);
}
processApiResponse(result, request, modelName) {
// Process the response based on expected format
// This is speculative - actual format will be determined when API is released
if (result.predictions && result.predictions.length > 0) {
const prediction = result.predictions[0];
const operationId = result.operationName || `lyria-${Date.now()}`;
return {
operationName: operationId,
status: 'SUCCEEDED',
metadata: {
createTime: new Date().toISOString(),
updateTime: new Date().toISOString(),
target: 'lyria-music-generation',
verb: 'generate',
},
done: true,
response: {
audio: {
uri: prediction.audioUri || prediction.uri,
bytesBase64Encoded: prediction.bytesBase64Encoded,
metadata: {
duration: request.durationSeconds || 30,
format: 'mp3',
sampleRate: 44100,
bitrate: '320kbps',
genre: request.genre,
mood: request.mood,
tempo: request.tempo,
structure: request.musicalStructure,
},
},
prompt: request.textPrompt,
modelVersion: modelName,
},
};
}
throw new Error('Unexpected response format from Lyria API');
}
generateMockResponse(request) {
const operationId = `mock-lyria-${Date.now()}`;
// Generate mock base64 audio data with informative message
const mockMessage = `
Mock Lyria 2 Response
Prompt: ${request.textPrompt}
Duration: ${request.durationSeconds || 30} seconds
Note: Lyria 2 API is not yet publicly available.
This is a mock response for development purposes.
To use real music generation, consider:
- MusicFX: https://aitestkitchen.withgoogle.com/tools/music-fx
- Alternative APIs: MusicGen (Replicate), Stable Audio
`;
const mockAudioData = Buffer.from(mockMessage).toString('base64');
return {
operationName: `projects/${this.projectId}/locations/${this.location}/operations/${operationId}`,
status: 'SUCCEEDED',
metadata: {
createTime: new Date().toISOString(),
updateTime: new Date().toISOString(),
target: 'lyria-music-generation',
verb: 'generate',
},
done: true,
response: {
audio: {
uri: `gs://mock-bucket/lyria-output/${operationId}/audio.mp3`,
bytesBase64Encoded: mockAudioData,
metadata: {
duration: request.durationSeconds || 30,
format: 'mp3',
sampleRate: 44100,
bitrate: '320kbps',
genre: request.genre,
mood: request.mood,
tempo: request.tempo,
structure: request.musicalStructure,
},
},
prompt: request.textPrompt,
modelVersion: 'mock-lyria-v2',
},
};
}
async getOperationStatus(operationName) {
if (this.mockMode || operationName.includes('mock')) {
// Return a completed mock operation
return {
operationName,
status: 'SUCCEEDED',
metadata: {
createTime: new Date().toISOString(),
updateTime: new Date().toISOString(),
target: 'lyria-music-generation',
verb: 'generate',
},
done: true,
response: {
audio: {
uri: `gs://mock-bucket/lyria-output/completed/audio.mp3`,
metadata: {
duration: 30,
format: 'mp3',
sampleRate: 44100,
bitrate: '320kbps',
},
},
prompt: 'Mock completed operation',
modelVersion: 'mock-lyria-v2',
},
};
}
const accessToken = await this.getAccessToken();
const endpoint = `https://${this.location}-aiplatform.googleapis.com/v1/${operationName}`;
const response = await fetch(endpoint, {
method: 'GET',
headers: {
'Authorization': `Bearer ${accessToken}`,
},
});
if (!response.ok) {
throw new Error(`Failed to get operation status: ${response.statusText}`);
}
const result = await response.json();
return result;
}
// Helper methods
async getAccessToken() {
if (!this.auth) {
throw new Error('No authentication configured for Lyria service');
}
const token = await this.auth.getAccessToken();
if (!token) {
throw new Error('Failed to get access token');
}
return token;
}
async executeWithRetry(operation) {
let lastError = null;
for (let attempt = 1; attempt <= this.MAX_RETRIES; attempt++) {
try {
return await operation();
}
catch (error) {
lastError = error;
this.log(`Attempt ${attempt} failed:`, error);
if (attempt < this.MAX_RETRIES) {
await this.delay(this.RETRY_DELAY * attempt);
}
}
}
throw lastError || new Error('Operation failed after retries');
}
delay(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
}
exports.LyriaService = LyriaService;
//# sourceMappingURL=lyria.service.js.map