/**
* Decode a Huffman symbol from the bitstream using the stated table and return it.
*
* @param BitReader $reader The reader that provides the data.
*
* @throws Exception Throws an Exception in case of errors.
*
* @return int
*/
public function readHuffmanSymbol(BitReader $reader)
{
$next = $reader->peek(16, true);
$symbol = $this->symbols[$reader->peek($this->bits, true)];
if ($symbol >= $this->maxSymbol) {
$j = 1 << 16 - $this->bits;
do {
$j >>= 1;
$symbol <<= 1;
$symbol |= ($next & $j) > 0 ? 1 : 0;
$symbol = $this->symbols[$symbol];
} while ($symbol >= $this->maxSymbol);
}
$reader->readLE($this->lens[$symbol]);
return $symbol;
}
