Seeing this: [PATCH v4 0/6] staging: media: wave5: add wave5 codec driver for the JH7100 (which I am guessing would be the same or very similar for the JH7110) would suggest that the H264/H265 Video Decoder/Encoding is probably done using Chips and Media IP, I’m going to guess:
wave511 for hardware decoding
wave521 for hardware encoding
Simply because that is the only hardware currently that firmware blobs are publicly available for from:
But driver code from Collabora to access the blocks over an AMBA3 32bit APB interface appears to be distributed under BSD 3 clause and LGPL2.1 (dual license), which is very nice.
But just to be clear I’m only guessing, I could be and, probably am wrong.