From 9bc8b32b8eaf8304d0c51c3340e15345b7300988 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Thu, 14 Sep 2017 22:50:08 -0400
Subject: [PATCH] add back-pointer to TempoMap from points, and push dirty=true
 into map

---
 nutemp/t.cc | 24 ++++++++++++++++++++++++
 nutemp/t.h  | 12 +++++++++---
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/nutemp/t.cc b/nutemp/t.cc
index 2ea87a0a16..c8336ccde8 100644
--- a/nutemp/t.cc
+++ b/nutemp/t.cc
@@ -306,6 +306,23 @@ TempoMetric::superclock_at_qn (Evoral::Beats const & qn) const
 	return llrint (superclocks_per_quarter_note() * (log1p (_c_per_quarter * qn.to_double()) / _c_per_quarter));
 }
 
+void
+TempoMapPoint::set_map (TempoMap* m)
+{
+	_map = m;
+}
+
+void
+TempoMapPoint::set_dirty (bool yn)
+{
+	if (yn != _dirty) {
+		_dirty = yn;
+		if (yn && _map) {
+			_map->set_dirty (true);
+		}
+	}
+}
+
 Evoral::Beats
 TempoMapPoint::quarters_at (superclock_t sc) const
 {
@@ -339,11 +356,18 @@ TempoMapPoint::bbt_at (Evoral::Beats const & qn) const
 
 TempoMap::TempoMap (Tempo const & initial_tempo, Meter const & initial_meter, framecnt_t sr)
 	: _sample_rate (sr)
+	, _dirty (false)
 {
 	TempoMapPoint tmp (TempoMapPoint::Flag (TempoMapPoint::ExplicitMeter|TempoMapPoint::ExplicitTempo), initial_tempo, initial_meter, 0, Evoral::Beats(), Timecode::BBT_Time(), AudioTime);
 	_points.push_back (tmp);
 }
 
+void
+TempoMap::set_dirty (bool yn)
+{
+	_dirty = yn;
+}
+
 Meter const &
 TempoMap::meter_at (superclock_t sc) const
 {
diff --git a/nutemp/t.h b/nutemp/t.h
index c4117a9ad5..be54c136ba 100644
--- a/nutemp/t.h
+++ b/nutemp/t.h
@@ -191,11 +191,13 @@ class LIBARDOUR_API TempoMapPoint
 	};
 
 	TempoMapPoint (Flag f, Tempo const& t, Meter const& m, superclock_t sc, Evoral::Beats const & q, Timecode::BBT_Time const & bbt, PositionLockStyle psl, bool ramp = false)
-		: _flags (f), _explicit (t, m, psl, ramp), _sclock (sc), _quarters (q), _bbt (bbt), _dirty (true) {}
+		: _flags (f), _explicit (t, m, psl, ramp), _sclock (sc), _quarters (q), _bbt (bbt), _dirty (true), _map (0) {}
 	TempoMapPoint (TempoMapPoint const & tmp, superclock_t sc, Evoral::Beats const & q, Timecode::BBT_Time const & bbt)
-		: _flags (Flag (0)), _reference (&tmp), _sclock (sc), _quarters (q), _bbt (bbt), _dirty (true) {}
+		: _flags (Flag (0)), _reference (&tmp), _sclock (sc), _quarters (q), _bbt (bbt), _dirty (true), _map (0) {}
 	~TempoMapPoint () {}
 
+	void set_map (TempoMap* m);
+
 	Flag flags() const       { return _flags; }
 	bool is_explicit() const { return _flags != Flag (0); }
 	bool is_implicit() const { return _flags == Flag (0); }
@@ -230,7 +232,7 @@ class LIBARDOUR_API TempoMapPoint
 	void set_sclock (superclock_t  sc) { if (is_explicit()) { _sclock = sc; _dirty = true; } }
 	void set_quarters (Evoral::Beats const & q) { if (is_explicit()) { _quarters = q; _dirty = true;  } }
 	void set_bbt (Timecode::BBT_Time const & bbt) {  if (is_explicit()) { _bbt = bbt; _dirty = true;  } }
-	void set_dirty (bool yn) { if (is_explicit()) { _dirty = yn; } }
+	void set_dirty (bool yn);
 	void set_lock_style (PositionLockStyle psl) {  if (is_explicit()) { _explicit.lock_style = psl; _dirty = true; } }
 
 	void make_explicit (Flag f) {
@@ -289,6 +291,7 @@ class LIBARDOUR_API TempoMapPoint
 	Evoral::Beats         _quarters;
 	Timecode::BBT_Time    _bbt;
 	bool                  _dirty;
+	TempoMap*             _map;
 };
 
 typedef std::list<TempoMapPoint> TempoMapPoints;
@@ -298,6 +301,8 @@ class LIBARDOUR_API TempoMap
    public:
 	TempoMap (Tempo const & initial_tempo, Meter const & initial_meter, framecnt_t sr);
 
+	void set_dirty (bool yn);
+
 	void set_sample_rate (framecnt_t sr);
 	framecnt_t sample_rate() const { return _sample_rate; }
 
@@ -360,6 +365,7 @@ class LIBARDOUR_API TempoMap
 	TempoMapPoints _points;
 	framecnt_t     _sample_rate;
 	mutable Glib::Threads::RWLock _lock;
+	bool _dirty;
 
 	/* these return an iterator that refers to the TempoMapPoint at or most immediately preceding the given position.
 	 *