From faac64850275d2c5764b2676cdf57fba9964d268 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 3 May 2023 21:53:36 -0600
Subject: [PATCH] temporal: add TempoMap::{next,previous_}meter()

---
 libs/temporal/tempo.cc         | 27 +++++++++++++++++++++++++++
 libs/temporal/temporal/tempo.h |  3 +++
 2 files changed, 30 insertions(+)

diff --git a/libs/temporal/tempo.cc b/libs/temporal/tempo.cc
index 799bb1e7d4..257fa4da72 100644
--- a/libs/temporal/tempo.cc
+++ b/libs/temporal/tempo.cc
@@ -3119,6 +3119,33 @@ TempoMap::previous_tempo (TempoPoint const & point) const
 	return &(*i);
 }
 
+MeterPoint const *
+TempoMap::next_meter (MeterPoint const & t) const
+{
+	Meters::const_iterator i = _meters.iterator_to (t);
+	++i;
+
+	if (i != _meters.end()) {
+		return &(*i);
+	}
+
+	return 0;
+}
+
+MeterPoint const *
+TempoMap::previous_meter (MeterPoint const & point) const
+{
+	Meters::const_iterator i = _meters.iterator_to (point);
+
+	if (i == _meters.begin()) {
+		return 0;
+	}
+
+	--i;
+
+	return &(*i);
+}
+
 double
 TempoMap::quarters_per_minute_at (timepos_t const & pos) const
 {
diff --git a/libs/temporal/temporal/tempo.h b/libs/temporal/temporal/tempo.h
index b032290ab5..0a6bc50424 100644
--- a/libs/temporal/temporal/tempo.h
+++ b/libs/temporal/temporal/tempo.h
@@ -796,6 +796,9 @@ class /*LIBTEMPORAL_API*/ TempoMap : public PBD::StatefulDestructible
 	LIBTEMPORAL_API TempoPoint const* previous_tempo (TempoPoint const &) const;
 	LIBTEMPORAL_API TempoPoint const* next_tempo (TempoPoint const &) const;
 
+	LIBTEMPORAL_API MeterPoint const* previous_meter (MeterPoint const &) const;
+	LIBTEMPORAL_API MeterPoint const* next_meter (MeterPoint const &) const;
+
 	LIBTEMPORAL_API bool tempo_exists_before (TempoPoint const & t) const { return (bool) previous_tempo (t); }
 	LIBTEMPORAL_API bool tempo_exists_after (TempoPoint const & t) const { return (bool) next_tempo (t); }