Function arrayBufferToBase64String

tfjs-core/src/io/io_utils.ts:424–434

(buffer: ArrayBuffer)

 * @returns A string that base64-encodes `buffer`.
 */
export function arrayBufferToBase64String(buffer: ArrayBuffer): string {
  if (useNodeBuffer) {
    return Buffer.from(buffer).toString('base64');
  }
  const buf = new Uint8Array(buffer);
  let s = '';
  for (let i = 0, l = buf.length; i < l; i++) {
    s += String.fromCharCode(buf[i]);
  }
  return btoa(s);
}

/**
 * Decode a base64 string as an ArrayBuffer.