From 0266d98a3b08ba90523b4b657d59da6acf036c77 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 31 Aug 2023 18:23:40 -0600
Subject: [PATCH] temporal: add TempoMap::{max,min}_notes_per_minute() API

---
 libs/temporal/tempo.cc         | 32 ++++++++++++++++++++++++++++++++
 libs/temporal/temporal/tempo.h |  3 +++
 2 files changed, 35 insertions(+)

diff --git a/libs/temporal/tempo.cc b/libs/temporal/tempo.cc
index 604dda006d..7269b26c13 100644
--- a/libs/temporal/tempo.cc
+++ b/libs/temporal/tempo.cc
@@ -4756,6 +4756,38 @@ TempoMap::map_assert (bool expr, char const * exprstr, char const * file, int li
 	}
 }
 
+double
+TempoMap::max_notes_per_minute() const
+{
+	double npm = 0;
+	for (auto const & t : _tempos) {
+		if (t.note_types_per_minute() > npm) {
+			npm = t.note_types_per_minute();
+		}
+		if (t.end_note_types_per_minute() > npm) {
+			npm = t.end_note_types_per_minute();
+		}
+	}
+
+	return npm;
+}
+
+double
+TempoMap::min_notes_per_minute() const
+{
+	double npm = std::numeric_limits<double>::max();
+
+	for (auto const & t : _tempos) {
+		if (t.note_types_per_minute() < npm) {
+			npm = t.note_types_per_minute();
+		}
+		if (t.end_note_types_per_minute() < npm) {
+			npm = t.end_note_types_per_minute();
+		}
+	}
+
+	return npm;
+}
 
 #if 0
 void
diff --git a/libs/temporal/temporal/tempo.h b/libs/temporal/temporal/tempo.h
index 94ce2490af..31244b8151 100644
--- a/libs/temporal/temporal/tempo.h
+++ b/libs/temporal/temporal/tempo.h
@@ -948,6 +948,9 @@ class /*LIBTEMPORAL_API*/ TempoMap : public PBD::StatefulDestructible
 	LIBTEMPORAL_API	TempoPoint const& tempo_at (Beats const & b) const { return _tempo_at (b, Point::beat_comparator()); }
 	LIBTEMPORAL_API TempoPoint const& tempo_at (BBT_Argument const & bbt) const { return _tempo_at (bbt, Point::bbt_comparator()); }
 
+	LIBTEMPORAL_API double max_notes_per_minute() const;
+	LIBTEMPORAL_API double min_notes_per_minute() const;
+
 	/* convenience function that hides some complexities behind fetching
 	 * the bpm at position
 	 */