CRC16_POLY 1132 libavcodec/ac3enc.c crc_inv = pow_poly((CRC16_POLY >> 1), (16 * frame_size_58) - 16, CRC16_POLY); CRC16_POLY 1133 libavcodec/ac3enc.c crc1 = mul_poly(crc_inv, crc1, CRC16_POLY);