Is there an open-source GPU implementation of OpenJPEG?

[xusiang]

Hi, I need to use JPEG2000 on the GPU to achieve both high compression ratio and throughput. I noticed that NVIDIA provides the closed-source nvjpeg, which is implemented using the CUDA Runtime API. I would like to ask if there is an open-source GPU version that allows me to modify the code according to my needs? Thank you for your reply.