/ VST Home / Technical Documentation

[3.6.5] Automation State

On this page:

• Introduction
• Example

Introduction

Extended plug-in interface IEditController: Vst::IAutomationState.

• [plug imp]
• [extends IEditController]
• [released: 3.6.5]
• [optional]

Hosts can inform the plug-in about its current automation state (Read/Write/Nothing).

Example

in mycontroller.h

//------------------------------------------------------------------------
class MyController: public EditControllerEx1, public IAutomationState
{
    //...
    //---IAutomationState---------------------------------
    tresult PLUGIN_API setAutomationState (int32 state) SMTG_OVERRIDE;
 
    //...
    DEFINE_INTERFACES
        //...
        DEF_INTERFACE (IAutomationState)
    END_DEFINE_INTERFACES (EditControllerEx1)
    //...
};

In mycontroller.cpp

//------------------------------------------------------------------------
tresult PLUGIN_API MyController::setAutomationState (int32 state)
{
    switch (state)
    {
        case kNoAutomation:
            break;
        case kReadState:
            break;
        case kWriteState:
            break;
        case kReadWriteState:
            break;
        default:
    }
    return kResultTrue;
}