How to convert OHLC data to Heikin Ashi OHLC Format

Hi,

I am trying to get Heikin Ashi candle data using regular OHLC candle. I got the formulas from internet and I have implemented it. But as Heikin Ashi candle open price depends on previous candle, I am struggling to get the first candle's Open price calculated correctly.

It will be great if someone help me to get the same.

I am trying to get the heikin ashi candle data for Banknifty Weekly Options.

Thanks