From 1d8ebee6d0f2d37c5c7a3d21535ea1ee8a41ec8b Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 2 Oct 2025 19:56:52 +0200
Subject: [PATCH] LV2: add note about LV2 UI updae freq (NO-OP)

---
 libs/ardour/ardour/lv2_plugin.h | 1 +
 libs/ardour/lv2_plugin.cc       | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/libs/ardour/ardour/lv2_plugin.h b/libs/ardour/ardour/lv2_plugin.h
index b348b052b3..4f290a2e2a 100644
--- a/libs/ardour/ardour/lv2_plugin.h
+++ b/libs/ardour/ardour/lv2_plugin.h
@@ -365,6 +365,7 @@ class LIBARDOUR_API LV2Plugin : public ARDOUR::Plugin, public ARDOUR::Workee
 	static uint32_t      _ui_foreground_color;
 	static uint32_t      _ui_contrasting_color;
 	static unsigned long _ui_transient_win_id;
+	static float         _ui_update_hz;
 
 	mutable unsigned _state_version;
 
diff --git a/libs/ardour/lv2_plugin.cc b/libs/ardour/lv2_plugin.cc
index 08da04c665..401a83a9d0 100644
--- a/libs/ardour/lv2_plugin.cc
+++ b/libs/ardour/lv2_plugin.cc
@@ -159,6 +159,7 @@ uint32_t      LV2Plugin::_ui_background_color  = 0x000000ff; // RGBA
 uint32_t      LV2Plugin::_ui_foreground_color  = 0xffffffff; // RGBA
 uint32_t      LV2Plugin::_ui_contrasting_color = 0x33ff33ff; // RGBA
 unsigned long LV2Plugin::_ui_transient_win_id  = 0;
+float         LV2Plugin::_ui_update_hz         = 25;
 
 
 class LV2World {
@@ -655,6 +656,10 @@ LV2Plugin::init(const void* c_plugin, samplecnt_t rate)
 		  sizeof(int32_t), atom_Bool, &_ui_style_flat },
 		{ LV2_OPTIONS_INSTANCE, 0, _uri_map.uri_to_id("http://kxstudio.sf.net/ns/lv2ext/props#TransientWindowId"),
 		  sizeof(int32_t), atom_Long, &_ui_transient_win_id },
+#if 0
+		{ LV2_OPTIONS_INSTANCE, 0, _uri_map.uri_to_id("http://lv2plug.in/ns/extensions/ui#updateRate"),
+		  sizeof(int32_t), atom_Float, &_ui_update_hz },
+#endif
 		{ LV2_OPTIONS_INSTANCE, 0, 0, 0, 0, NULL }
 	};