Is bus state be stored as part of component state?

Developer VST 3 SDK
1

The docs for IComponent::getState/setState both refer to saving/loading the “complete state of component”. Does this include the speaker arrangement and activated state of each bus?

Or should these be managed and persisted by the host?

2

This is the job of the host. It must set the plug-in into the same state and setting bus arrangements and activating busses are something the plug-in cannot do by its own.

3

Thanks @Arne_Scheffler,

That’s what I assumed but the wording of the documentation on getState/setState caused some doubt.

Brad

4

In some situations the plug-in may have to save its arrangements like upmix or downmix plug-ins, with for example preset for 5.1=>stereo or 5.1=>4.0.
But for the main use case, like Arne mentioned, this is job of the host which controls where the plug-in is integrated in its mixer routing graph.