Rom that will make camera RAW files option works in S5 using camera fv-5

Hi, I am new here. Can someone point me to a working rom that can work with RAW files options with camera fv-5 app? I am a photographer and would like to use my phone as a back up just in case. But wanted the raw files instead of jpg. I am rooted using 5.1.1, g900w8.
Thanks in advance.