From 3f4d49fd2f6fca3237668897e91212ea93b05b07 Mon Sep 17 00:00:00 2001
From: nick_m <mainsbridge@gmail.com>
Date: Wed, 7 Sep 2016 00:18:35 +1000
Subject: Load midi region length and start correctly in sessions modified by
 v5.0 -> 5.3-41

---
 libs/ardour/ardour/session.h |  4 ++++
 libs/ardour/midi_region.cc   | 14 +++++++++++---
 libs/ardour/session.cc       |  3 ++-
 libs/ardour/session_state.cc | 14 ++++++++++++++
 4 files changed, 31 insertions(+), 4 deletions(-)

(limited to 'libs/ardour')

diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 858a2c6d97..bb2da411c8 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -1128,6 +1128,8 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 
 	VCAManager& vca_manager() { return *_vca_manager; }
 
+	bool midi_regions_use_bbt_beats () { return _midi_regions_use_bbt_beats; }
+
   protected:
 	friend class AudioEngine;
 	void set_block_size (pframes_t nframes);
@@ -2016,6 +2018,8 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 	boost::shared_ptr<Route> get_midi_nth_route_by_id (PresentationInfo::order_t n) const;
 
 	std::string created_with;
+
+	bool _midi_regions_use_bbt_beats;
 };
 
 
diff --git a/libs/ardour/midi_region.cc b/libs/ardour/midi_region.cc
index cf72379211..67bd7a1b3d 100644
--- a/libs/ardour/midi_region.cc
+++ b/libs/ardour/midi_region.cc
@@ -439,10 +439,18 @@ MidiRegion::set_state (const XMLNode& node, int version)
 		if (position_lock_style() == AudioTime) {
 			update_length_beats (0);
 		}
-	}
 
-	_start_pulse = _start_beats.val().to_double() / 4.0;
-	_length_pulse = _length_beats.val().to_double() / 4.0;
+		if (_session.midi_regions_use_bbt_beats()) {
+			info << _("Updating midi region start and length beats") << endmsg;
+			TempoMap& map (_session.tempo_map());
+			_start_beats = Evoral::Beats ((map.pulse_at_beat (_beat) - map.pulse_at_beat (_beat - _start_beats.val().to_double())) * 4.0);
+			_length_beats = Evoral::Beats ((map.pulse_at_beat (_beat + _length_beats.val().to_double()) - map.pulse_at_beat (_beat)) * 4.0);
+
+		}
+
+		_start_pulse = _start_beats.val().to_double() / 4.0;
+		_length_pulse = _length_beats.val().to_double() / 4.0;
+	}
 
 	return ret;
 }
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index fc66dfe602..9fd3539dae 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -318,6 +318,7 @@ Session::Session (AudioEngine &eng,
 	, _midi_ports (0)
 	, _mmc (0)
 	, _vca_manager (new VCAManager (*this))
+	, _midi_regions_use_bbt_beats (false)
 {
 	uint32_t sr = 0;
 
@@ -477,10 +478,10 @@ Session::Session (AudioEngine &eng,
 		}
 	}
 #endif
+	_midi_regions_use_bbt_beats = false;
 
 	_is_new = false;
 	session_loaded ();
-
 	BootMessage (_("Session loading complete"));
 }
 
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 41d6d51979..48048ba764 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -1000,6 +1000,20 @@ Session::load_state (string snapshot_name)
 				return -1;
 			}
 		}
+	} else {
+		XMLNode* child;
+		if ((child = find_named_node (root, "ProgramVersion")) != 0) {
+			if ((prop = child->property ("modified-with")) != 0) {
+				std::string modified_with = prop->value ();
+
+				const double modified_with_version = atof (modified_with.substr ( modified_with.find(" ", 0) + 1, string::npos).c_str());
+				const int modified_with_revision = atoi (modified_with.substr (modified_with.find("-", 0) + 1, string::npos).c_str());
+
+				if (modified_with_version <= 5.3 && !(modified_with_version == 5.3 && modified_with_revision >= 42)) {
+					_midi_regions_use_bbt_beats = true;
+				}
+			}
+		}
 	}
 
 	save_snapshot_name (snapshot_name);
-- 
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