From 698ad071b77642818fd030cedaad3f460f4ad026 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 13 Jun 2024 17:00:24 +0200
Subject: [PATCH] VST3: prepare to provide a runloop to IAudioProcessor

Currently _run_loop is NULL (which is valid) until the
GUI is opened at least once. Next step is to move
the [static] runloop into libpbd.
---
 libs/ardour/vst3_host.cc   | 1 +
 libs/ardour/vst3_plugin.cc | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/libs/ardour/vst3_host.cc b/libs/ardour/vst3_host.cc
index 748832e241..0ba39bc82f 100644
--- a/libs/ardour/vst3_host.cc
+++ b/libs/ardour/vst3_host.cc
@@ -36,6 +36,7 @@ DEF_CLASS_IID (IBStream)
 DEF_CLASS_IID (IPluginBase)
 DEF_CLASS_IID (IPluginFactory)
 DEF_CLASS_IID (IPluginFactory2)
+DEF_CLASS_IID (IPluginFactory3)
 DEF_CLASS_IID (IPlugFrame)
 DEF_CLASS_IID (IPlugView)
 DEF_CLASS_IID (ISizeableStream)
diff --git a/libs/ardour/vst3_plugin.cc b/libs/ardour/vst3_plugin.cc
index 313751f659..48cc24e09c 100644
--- a/libs/ardour/vst3_plugin.cc
+++ b/libs/ardour/vst3_plugin.cc
@@ -1277,6 +1277,14 @@ VST3PI::VST3PI (std::shared_ptr<ARDOUR::VST3PluginModule> m, std::string unique_
 		throw failed_constructor ();
 	}
 
+#if SMTG_OS_LINUX
+	IPtr<IPluginFactory3> factory3 = FUnknownPtr<IPluginFactory3> (factory);
+	if (factory3) {
+		Vst::IComponentHandler* ctx = this;
+		factory3->setHostContext ((FUnknown*) ctx);
+	}
+#endif
+
 	/* prepare process context */
 	memset (&_context, 0, sizeof (Vst::ProcessContext));