separate.ts

export function* separate(
  data: Uint8Array,
  bitLength: number
): Generator<number> {
  let bufferBitLength = 0;
  let buffer = 0;

  for (const chunk of data) {
    bufferBitLength += 8;
    buffer = (buffer << 8) | chunk;

    while (bufferBitLength > bitLength) {
      yield buffer >> (bufferBitLength - bitLength);

      bufferBitLength -= bitLength;
      buffer = buffer & (2 ** bufferBitLength - 1);
    }
  }

  yield buffer << (bitLength - bufferBitLength);
}