Hi Mark Thank you for your feedback > > +----------------------+ > > |CPU | +------+ > > | +--[rate convert]<--| <-- |Codec1| <-- > > | | | +------+ > > | | | +------+ > > | +------------------>| --> |Codec2| --> > > +----------------------+ +------+ > > > I think there are 2 issues. > > (1) How to handle [CPU] part on Codec2Codec ? > > (2) How to handle [rate convert] on Codec2Codec ? > > At the minute this would be a DPCM thing. I've never actively worked on > a system with DPCM so I'm not as up to speed as I could be but with my > current understanding I'd expect the rate conversion to be done as a > backend fixup on the DAI link for the first CODEC and just a straight > pass through for the second. > > > I think (2) [rate convert] needs DPCM connection, > > but how to use it with Codec2Codec ? > > The whole thing is a bit fragile so I don't know how well those two play > together. Though your picture doesn't look like it's actually doing a > codec2codec link? It probably should ideally (with the SRC being a > CODEC in the graph) but not right now. I think we can learn how Codec2Codec is working, and apply it to DPCM somehow. Then, if we can handle above via DPCM, I guess normal Codec2Codec also can be handled via DPCM ? Thank you for your help !! Best regards --- Kuninori Morimoto
