105 lines
4.5 KiB
Swift
105 lines
4.5 KiB
Swift
import Foundation
|
|
|
|
class ElevenLabsTranscriptionService {
|
|
|
|
func transcribe(audioURL: URL, model: any TranscriptionModel) async throws -> String {
|
|
let config = try getAPIConfig(for: model)
|
|
|
|
let boundary = "Boundary-\(UUID().uuidString)"
|
|
var request = URLRequest(url: config.url)
|
|
request.httpMethod = "POST"
|
|
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
|
|
request.setValue("application/json", forHTTPHeaderField: "Accept")
|
|
request.setValue(config.apiKey, forHTTPHeaderField: "xi-api-key")
|
|
|
|
let body = try createElevenLabsRequestBody(audioURL: audioURL, modelName: config.modelName, boundary: boundary)
|
|
|
|
let (data, response) = try await URLSession.shared.upload(for: request, from: body)
|
|
guard let httpResponse = response as? HTTPURLResponse else {
|
|
throw CloudTranscriptionError.networkError(URLError(.badServerResponse))
|
|
}
|
|
|
|
if !(200...299).contains(httpResponse.statusCode) {
|
|
let errorMessage = String(data: data, encoding: .utf8) ?? "No error message"
|
|
throw CloudTranscriptionError.apiRequestFailed(statusCode: httpResponse.statusCode, message: errorMessage)
|
|
}
|
|
|
|
do {
|
|
let transcriptionResponse = try JSONDecoder().decode(TranscriptionResponse.self, from: data)
|
|
return transcriptionResponse.text
|
|
} catch {
|
|
throw CloudTranscriptionError.noTranscriptionReturned
|
|
}
|
|
}
|
|
|
|
private func getAPIConfig(for model: any TranscriptionModel) throws -> APIConfig {
|
|
guard let apiKey = UserDefaults.standard.string(forKey: "ElevenLabsAPIKey"), !apiKey.isEmpty else {
|
|
throw CloudTranscriptionError.missingAPIKey
|
|
}
|
|
|
|
let apiURL = URL(string: "https://api.elevenlabs.io/v1/speech-to-text")!
|
|
return APIConfig(url: apiURL, apiKey: apiKey, modelName: model.name)
|
|
}
|
|
|
|
private func createElevenLabsRequestBody(audioURL: URL, modelName: String, boundary: String) throws -> Data {
|
|
var body = Data()
|
|
let crlf = "\r\n"
|
|
|
|
guard let audioData = try? Data(contentsOf: audioURL) else {
|
|
throw CloudTranscriptionError.audioFileNotFound
|
|
}
|
|
|
|
// File
|
|
body.append("--\(boundary)\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Disposition: form-data; name=\"file\"; filename=\"\(audioURL.lastPathComponent)\"\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Type: audio/wav\(crlf)\(crlf)".data(using: .utf8)!)
|
|
body.append(audioData)
|
|
body.append(crlf.data(using: .utf8)!)
|
|
|
|
// Model ID
|
|
body.append("--\(boundary)\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Disposition: form-data; name=\"model_id\"\(crlf)\(crlf)".data(using: .utf8)!)
|
|
body.append(modelName.data(using: .utf8)!)
|
|
body.append(crlf.data(using: .utf8)!)
|
|
|
|
// Disable audio event tagging
|
|
body.append("--\(boundary)\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Disposition: form-data; name=\"tag_audio_events\"\(crlf)\(crlf)".data(using: .utf8)!)
|
|
body.append("false".data(using: .utf8)!)
|
|
body.append(crlf.data(using: .utf8)!)
|
|
|
|
body.append("--\(boundary)\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Disposition: form-data; name=\"temperature\"\(crlf)\(crlf)".data(using: .utf8)!)
|
|
body.append("0".data(using: .utf8)!)
|
|
body.append(crlf.data(using: .utf8)!)
|
|
|
|
let selectedLanguage = UserDefaults.standard.string(forKey: "SelectedLanguage") ?? "auto"
|
|
if selectedLanguage != "auto", !selectedLanguage.isEmpty {
|
|
body.append("--\(boundary)\(crlf)".data(using: .utf8)!)
|
|
body.append("Content-Disposition: form-data; name=\"language_code\"\(crlf)\(crlf)".data(using: .utf8)!)
|
|
body.append(selectedLanguage.data(using: .utf8)!)
|
|
body.append(crlf.data(using: .utf8)!)
|
|
}
|
|
|
|
body.append("--\(boundary)--\(crlf)".data(using: .utf8)!)
|
|
|
|
return body
|
|
}
|
|
|
|
private struct APIConfig {
|
|
let url: URL
|
|
let apiKey: String
|
|
let modelName: String
|
|
}
|
|
|
|
private struct TranscriptionResponse: Decodable {
|
|
let text: String
|
|
let language: String?
|
|
let duration: Double?
|
|
let x_groq: GroqMetadata?
|
|
|
|
struct GroqMetadata: Decodable {
|
|
let id: String?
|
|
}
|
|
}
|
|
} |