GQRX Remote Control Protocol support for setting Device string?

[Douglas Ward]

It would be useful for the GQRX Remote Control Protocol to support switching between multiple receivers by changing the Device string - like the field displayed in the "Configure I/O devices" window.

It would also be useful for RTL-SDR users to remotely switch direct sampling mode on or off with a Device string like "rtl=0,direct_samp=2".  

Is this technically feasible?  

I'll propose two extensions to the GQRX Remote Control Protocol: "\get_Device_string" and "\set_Device_string".  If there are better choices for command names, or general thoughts about this proposal, please let me know.  If rigctl has commands that would be compatible with this function, that would be the preferred option.

A typical usage might be -

U DSP 0

\set_Device_string rtl=0,direct_samp=2

U DSP 1

If the Device string can be controlled remotely, I want to add support for GQRX Remote Control Protocol to my GitHub project LocalRadio.app for macOS at https://github.com/dsward2/LocalRadio

[Douglas Ward]

These might be better commands -

\get_input_device_list

\get_input_device

\set_input_device

\get_output_device_list

\get_output_device

\set_output_device