From a0ba6e3dfb3458f012042524514cd622b4bcec49 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 1 Jul 2025 17:26:13 +0200
Subject: [PATCH] Cache BundleChannel nchannels, allow lock-free calls

---
 libs/ardour/ardour/bundle.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libs/ardour/ardour/bundle.h b/libs/ardour/ardour/bundle.h
index c6e93edbca..b6cf231708 100644
--- a/libs/ardour/ardour/bundle.h
+++ b/libs/ardour/ardour/bundle.h
@@ -174,8 +174,18 @@ public:
 		return bundle != other.bundle || channel != other.channel;
 	}
 
+	ChanCount nchannels () const {
+		if (!_nchannels) {
+			_nchannels = bundle->nchannels ();
+		}
+		return _nchannels.value ();
+	}
+
 	std::shared_ptr<Bundle> bundle;
 	int channel; ///< channel index, or -1 for "all"
+
+private:
+	mutable std::optional<ChanCount> _nchannels;
 };
 
 }