audio-transcripter
Version:
Lightweight TypeScript library for transcribing audio files using Google Gemini 2.0 models. Supports local files, remote URLs, and Blobs.
113 lines (112 loc) • 3.81 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.CustomFile = void 0;
exports.getMimeType = getMimeType;
exports.getFileBuffer = getFileBuffer;
exports.createFileFromBuffer = createFileFromBuffer;
const fs = __importStar(require("node:fs/promises"));
const path = __importStar(require("node:path"));
class CustomFile extends Blob {
name;
lastModified;
constructor(fileBits, fileName, options = {}) {
super(fileBits, options);
this.name = fileName;
this.lastModified = options.lastModified ?? Date.now();
}
}
exports.CustomFile = CustomFile;
const mimeTypes = {
".mp3": "audio/mpeg",
".wav": "audio/wav",
".aac": "audio/aac",
".flac": "audio/flac",
".ogg": "audio/ogg",
".webm": "audio/webm",
".weba": "audio/webm",
};
function getMimeType(filePath) {
const ext = path.extname(filePath).toLowerCase();
if (Object.hasOwn(mimeTypes, ext)) {
return mimeTypes[ext];
}
else {
console.warn(`[warn] Unknown extension '${ext}' for path '${filePath}', using fallback 'audio/octet-stream'.`);
return "audio/octet-stream";
}
}
async function getFileBuffer(input, sourceType) {
try {
if (sourceType === "buffer") {
return input;
}
else if (sourceType === "remote") {
return await getRemoteFileBuffer(input);
}
else {
return await getLocalFileBuffer(input);
}
}
catch (error) {
console.error(`[error] Failed to get file buffer:`, error instanceof Error ? error.message : String(error));
return null;
}
}
async function getRemoteFileBuffer(filePath) {
const response = await fetch(filePath);
if (!response.ok) {
throw new Error(`Failed to fetch remote file: ${response.statusText}`);
}
const arrayBuffer = await response.arrayBuffer();
return Buffer.from(arrayBuffer);
}
async function getLocalFileBuffer(filePath) {
return await fs.readFile(filePath);
}
function createFileFromBuffer(buffer, input, sourceType) {
let mimeType;
let fileName;
if (sourceType === "buffer") {
mimeType = "audio/wav";
fileName = "audio_buffer.wav";
}
else {
const filePath = input;
mimeType = getMimeType(filePath);
fileName = path.basename(filePath);
}
return new CustomFile([buffer], fileName, { type: mimeType });
}