Resample: ignore one of the channels?

[Maobuff]

Hi, I'm trying to record left and right channels. My theory that my task is possible with two separate pipelines with single i2s src : first ignore left channel, second ignore right channel. I narrowed my research to libesp_processing.a. But could not find any source code. I understand than this in not my business, but by any chance is it possible to add this kind of feature?