Entry level DSP for Dolby digital decoder

Hi Sir,

Our customer want to design 5.1 Dolby Digital decode and support 5.1 channel down-mix to 2 channel analog audio function.

The first priority will be SigmaDSP , but it look ADI can't provide decode library in few years ago. 

https://ez.analog.com/audio/f/q-a/3256/use-adau1452-for-dolby-5-1-decode

Could you help to suggest the entry level DSP for dolby 5.1 decoder?

https://www.analog.com/en/design-center/evaluation-hardware-and-software/software/bf_dolby_digital_51_decoder.html#software-licensing

BR

Justin

Thanks for your help.