From d1ffeb7038f1ae98cd09bcbe90eea8d8e2ba5287 Mon Sep 17 00:00:00 2001
From: Damien Zammit <damien@zamaudio.com>
Date: Mon, 22 Dec 2025 15:32:18 +1100
Subject: [PATCH] import_pt: Use new bulk create method for adding tracks #9730

Speeds up imports tremendously.
---
 libs/ardour/import_pt.cc | 42 ++++++++++++++++++++++++++--------------
 1 file changed, 27 insertions(+), 15 deletions(-)

diff --git a/libs/ardour/import_pt.cc b/libs/ardour/import_pt.cc
index ad681e3504..2c779e69de 100644
--- a/libs/ardour/import_pt.cc
+++ b/libs/ardour/import_pt.cc
@@ -277,11 +277,13 @@ Session::import_pt_rest (PTFFormat& ptf)
 	string fullpath;
 	uint32_t srate = sample_rate ();
 	timepos_t latest = timepos_t (0);
+	bool ok;
 
 	vector<struct ptflookup> ptfregpair;
 
 	SourceList just_one_src;
-
+	RouteList routes;
+	list<std::shared_ptr<AudioTrack> > tracks;
 	std::shared_ptr<AudioTrack> existing_track;
 	uint16_t nth = 0;
 	struct ptflookup utr;
@@ -345,24 +347,34 @@ Session::import_pt_rest (PTFFormat& ptf)
 			if (!(existing_track = dynamic_pointer_cast<AudioTrack> (route_by_name (a->name)))) {
 				/* Create missing track */
 				DEBUG_TRACE (DEBUG::PTImport, string_compose ("Create tr(%1) '%2'\n", nth, a->name));
-				list<std::shared_ptr<AudioTrack> > at (new_audio_track (1, 2, 0, 1, a->name.c_str(), PresentationInfo::max_order, Normal));
-				if (at.empty ()) {
-					return;
-				}
-				existing_track = at.back();
-			}
-			track_map[a->name] = existing_track;
-			std::shared_ptr<Playlist> playlist = existing_track->playlist();
+				ok = new_audio_routes_tracks_bulk (routes,
+								   tracks,
+								   1, 2, 0, 1,
+								   a->name.c_str (),
+								   PresentationInfo::max_order,
+								   Normal
+								  );
+				if (ok) {
+					existing_track = tracks.back();
+					track_map[a->name] = existing_track;
+					std::shared_ptr<Playlist> playlist = existing_track->playlist();
 
-			PlaylistState before;
-			before.playlist = playlist;
-			before.before = &playlist->get_state();
-			playlist->clear_changes ();
-			playlist->freeze ();
-			playlists.push_back(before);
+					PlaylistState before;
+					before.playlist = playlist;
+					before.before = &playlist->get_state();
+					playlist->clear_changes ();
+					playlist->freeze ();
+					playlists.push_back(before);
+				}
+			}
 		}
 	}
 
+	/* Finish bringing in routes */
+	if (!routes.empty ()) {
+		add_routes (routes, true, true, PresentationInfo::max_order);
+	}
+
 	/* Add regions */
 	for (vector<PTFFormat::track_t>::const_iterator a = ptf.tracks ().begin (); a != ptf.tracks ().end (); ++a) {
 		for (vector<struct ptflookup>::iterator p = ptfregpair.begin ();