[linux-audio-dev] XAP again - channels, etc.

I fear we've all been very busy. I know I have. I have not had time to devote to XAP, though I have certainly not lost interest. So today I start looking at my evolving spec doc again. The biggest chunk of undecidedness lies in the area of Channels. We never really resolved the Bays/Channels etc debate. We just put it off. Here it is. I'd like to propose the following - it is simple and flexible. Not too confusing. Plugins define 'Modules'. Every plugin has a master Module, and 0-n extra Modules. The host can instantiate Modules as needed. A Module is analogous to a MIDI Channel in a synth (maybe Module is the wrong word). It is analogous to a slot in a mixer. struct XAP_descriptor { ... /* master module descriptor */ XAP_module master; /* other channel descriptors */ int n_modules; XAP_module *modules; /* * Instantiate a module, return a plugin-unique * id/index for it - it's 'Channel'. */ int (*add_module)(void *plugin, int module); /* * Remove a module. */ int (*del_module)(void *plugin, int index); }; struct XAP_module { char *label; char *name; uint32_t flags; /* how many instances of this module are allowed? */ int count_max; /* per-module controls and I/O */ int n_controls; XAP_control **controls; int n_ports; XAP_port **ports; };