From c62c67a96cd66c3ef169774df112b390f68af556 Mon Sep 17 00:00:00 2001
From: Robbert van der Helm <mail@robbertvanderhelm.nl>
Date: Sun, 10 Jan 2021 23:34:23 +0100
Subject: [PATCH] Add a message structs for IAutomationState

---
 .../vst3/plugin/automation-state.h             | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/common/serialization/vst3/plugin/automation-state.h b/src/common/serialization/vst3/plugin/automation-state.h
index c19db200..9bb4bf3f 100644
--- a/src/common/serialization/vst3/plugin/automation-state.h
+++ b/src/common/serialization/vst3/plugin/automation-state.h
@@ -64,6 +64,24 @@ class YaAutomationState : public Steinberg::Vst::IAutomationState {
 
     inline bool supported() const { return arguments.supported; }
 
+    /**
+     * Message to pass through a call to
+     * `IAutomationState::setAutomationState(state)` to the Wine plugin host.
+     */
+    struct SetAutomationState {
+        using Response = UniversalTResult;
+
+        native_size_t instance_id;
+
+        int32 state;
+
+        template <typename S>
+        void serialize(S& s) {
+            s.value8b(instance_id);
+            s.value4b(state);
+        }
+    };
+
     virtual tresult PLUGIN_API setAutomationState(int32 state) override = 0;
 
    protected: