From 37d24eee7da6639ade50fbefe9f23b7419d4732c Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 2 May 2024 22:50:56 +0200
Subject: [PATCH] Flush Audioregion local [fx] cache when changing region gain

---
 libs/ardour/ardour/audioregion.h |  1 +
 libs/ardour/ardour/region.h      |  2 +-
 libs/ardour/audioregion.cc       | 21 +++++++++++++++++++++
 3 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/libs/ardour/ardour/audioregion.h b/libs/ardour/ardour/audioregion.h
index c8e447218b..92a7b8b284 100644
--- a/libs/ardour/ardour/audioregion.h
+++ b/libs/ardour/ardour/audioregion.h
@@ -279,6 +279,7 @@ class LIBARDOUR_API AudioRegion : public Region, public AudioReadable
 	bool _add_plugin (std::shared_ptr<RegionFxPlugin>, std::shared_ptr<RegionFxPlugin>, bool);
 
 	int _set_state (const XMLNode&, int version, PBD::PropertyChange& what_changed, bool send_signal);
+	void send_change (const PBD::PropertyChange&);
 };
 
 } /* namespace ARDOUR */
diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index 2f51aaf5d7..a66dc036f0 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -565,7 +565,7 @@ protected:
 	virtual bool _add_plugin (std::shared_ptr<RegionFxPlugin>, std::shared_ptr<RegionFxPlugin>, bool) { return false; }
 	virtual void fx_latency_changed (bool no_emit);
 
-	void send_change (const PBD::PropertyChange&);
+	virtual void send_change (const PBD::PropertyChange&);
 	virtual int _set_state (const XMLNode&, int version, PBD::PropertyChange& what_changed, bool send_signal);
 	virtual void set_position_internal (timepos_t const & pos);
 	virtual void set_length_internal (timecnt_t const &);
diff --git a/libs/ardour/audioregion.cc b/libs/ardour/audioregion.cc
index 3f5aaa82b3..85be9e78f3 100644
--- a/libs/ardour/audioregion.cc
+++ b/libs/ardour/audioregion.cc
@@ -251,6 +251,27 @@ AudioRegion::init ()
 	_fx_latent_read = false;
 }
 
+void
+AudioRegion::send_change (const PropertyChange& what_changed)
+{
+
+	PropertyChange our_interests;
+
+	our_interests.add (Properties::fade_in_active);
+	our_interests.add (Properties::fade_out_active);
+	our_interests.add (Properties::scale_amplitude);
+	our_interests.add (Properties::envelope_active);
+	our_interests.add (Properties::envelope);
+	our_interests.add (Properties::fade_in);
+	our_interests.add (Properties::fade_out);
+
+	if (what_changed.contains (our_interests)) {
+		_invalidated.exchange (true);
+	}
+
+	Region::send_change (what_changed);
+}
+
 void
 AudioRegion::copy_plugin_state (std::shared_ptr<const AudioRegion> other)
 {