From 20269df975f4c6edd127d0cb4a114f9e89b7a4e1 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 8 Aug 2025 15:41:32 -0600
Subject: [PATCH] Regions get their own tempo and meter

This defaults to the usual 120bpm 4/4 but is also not used anywhere yet
---
 libs/ardour/ardour/region.h |  7 +++++++
 libs/ardour/region.cc       | 15 +++++++++++++--
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/libs/ardour/ardour/region.h b/libs/ardour/ardour/region.h
index d682ac9e0f..bccdbf78f0 100644
--- a/libs/ardour/ardour/region.h
+++ b/libs/ardour/ardour/region.h
@@ -29,6 +29,7 @@
 #include "temporal/domain_swap.h"
 #include "temporal/timeline.h"
 #include "temporal/range.h"
+#include "temporal/tempo.h"
 
 #include "pbd/undo.h"
 #include "pbd/signals.h"
@@ -541,6 +542,9 @@ public:
 		}
 	}
 
+	Temporal::Tempo tempo() const { return _tempo; }
+	Temporal::Meter meter() const { return _meter; }
+
 protected:
 	virtual XMLNode& state () const;
 
@@ -593,6 +597,9 @@ protected:
 	uint32_t                      _fx_tail;
 	RegionFxList                  _plugins;
 
+	Temporal::Tempo _tempo;
+	Temporal::Meter _meter;
+
 	PBD::Property<bool>      _sync_marked;
 	PBD::Property<bool>      _left_of_split;
 	PBD::Property<bool>      _right_of_split;
diff --git a/libs/ardour/region.cc b/libs/ardour/region.cc
index ac7d2ab2b6..6da010e635 100644
--- a/libs/ardour/region.cc
+++ b/libs/ardour/region.cc
@@ -228,7 +228,9 @@ Region::register_properties ()
 }
 
 #define REGION_DEFAULT_STATE(s,l) \
-	_sync_marked (Properties::sync_marked, false) \
+	  _tempo (120, 4) \
+	, _meter (4, 4) \
+	, _sync_marked (Properties::sync_marked, false) \
 	, _left_of_split (Properties::left_of_split, false) \
 	, _right_of_split (Properties::right_of_split, false) \
 	, _valid_transients (Properties::valid_transients, false) \
@@ -259,7 +261,9 @@ Region::register_properties ()
 	, _contents (Properties::contents, false)
 
 #define REGION_COPY_STATE(other) \
-	  _sync_marked (Properties::sync_marked, other->_sync_marked) \
+	  _tempo (other->_tempo) \
+	, _meter (other->_meter) \
+	, _sync_marked (Properties::sync_marked, other->_sync_marked) \
 	, _left_of_split (Properties::left_of_split, other->_left_of_split) \
 	, _right_of_split (Properties::right_of_split, other->_right_of_split) \
 	, _valid_transients (Properties::valid_transients, other->_valid_transients) \
@@ -1420,6 +1424,9 @@ Region::state () const
 	node->set_property ("id", id ());
 	node->set_property ("type", _type);
 
+	node->add_child_nocopy (_tempo.get_state());
+	node->add_child_nocopy (_meter.get_state());
+
 	std::string fe;
 
 	switch (_first_edit) {
@@ -1619,6 +1626,10 @@ Region::_set_state (const XMLNode& node, int version, PropertyChange& what_chang
 				}
 				_plugins.push_back (rfx);
 				changed = true;
+			} else  if (child->name() == Temporal::Tempo::xml_node_name) {
+				_tempo.set_state (*child, version);
+			} else  if (child->name() == Temporal::Meter::xml_node_name) {
+				_meter.set_state (*child, version);
 			}
 		}
 		lm.release ();