From 27653eaeba422866e17992237629c2fb0db2dee3 Mon Sep 17 00:00:00 2001
From: Damien Zammit <damien@zamaudio.com>
Date: Sun, 21 Dec 2025 16:51:06 +1100
Subject: [PATCH] session: Add new_audio_routes_tracks_bulk() method

This allows bulk creating tracks with different name templates.
Simply call the bulk method multiple times as required and finally
call add_routes() once.
---
 libs/ardour/ardour/session.h | 16 +++++++++++
 libs/ardour/session.cc       | 54 ++++++++++++++++++++++++++++--------
 2 files changed, 58 insertions(+), 12 deletions(-)

diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index 7b89352ceb..ab22ce781a 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -779,6 +779,22 @@ public:
 		bool trigger_visibility = false
 		);
 
+	/* Call this repeatedly with different track name templates and finally call add_routes.
+	 * useful for speeding up imports of various kinds that involve lots of tracks */
+	bool new_audio_routes_tracks_bulk (
+		RouteList& routes,
+		std::list<std::shared_ptr<AudioTrack> >& tracks,
+		int input_channels,
+		int output_channels,
+		std::shared_ptr<RouteGroup> route_group,
+		uint32_t how_many,
+		std::string name_template,
+		PresentationInfo::order_t order,
+		TrackMode mode = Normal,
+		bool input_auto_connect = true,
+		bool trigger_visibility = false
+		);
+
 	std::list<std::shared_ptr<MidiTrack> > new_midi_track (
 		const ChanCount& input, const ChanCount& output, bool strict_io,
 		std::shared_ptr<PluginInfo> instrument,
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 40b374512f..0ccb29aab5 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -3004,17 +3004,17 @@ Session::ensure_route_presentation_info_gap (PresentationInfo::order_t first_new
 /** Caller must not hold process lock
  *  @param name_template string to use for the start of the name, or "" to use "Audio".
  */
-list< std::shared_ptr<AudioTrack> >
-Session::new_audio_track (int input_channels, int output_channels, std::shared_ptr<RouteGroup> route_group,
-                          uint32_t how_many, string name_template, PresentationInfo::order_t order,
-                          TrackMode mode, bool input_auto_connect,
-                          bool trigger_visibility)
+bool
+Session::new_audio_routes_tracks_bulk (RouteList& routes, list< std::shared_ptr<AudioTrack> >& tracks,
+                                       int input_channels, int output_channels, std::shared_ptr<RouteGroup> route_group,
+                                       uint32_t how_many, string name_template, PresentationInfo::order_t order,
+                                       TrackMode mode, bool input_auto_connect,
+                                       bool trigger_visibility)
 {
 	string track_name;
 	uint32_t track_id = 0;
 	string port;
-	RouteList new_routes;
-	list<std::shared_ptr<AudioTrack> > ret;
+	bool ret = true;
 
 	const string name_pattern = default_track_name_pattern (DataType::AUDIO);
 	bool const use_number = (how_many != 1) || name_template.empty () || (name_template == name_pattern);
@@ -3067,8 +3067,8 @@ Session::new_audio_track (int input_channels, int output_channels, std::shared_p
 
 			track->presentation_info ().set_trigger_track (trigger_visibility);
 
-			new_routes.push_back (track);
-			ret.push_back (track);
+			routes.push_back (track);
+			tracks.push_back (track);
 		}
 
 		catch (failed_constructor &err) {
@@ -3085,12 +3085,42 @@ Session::new_audio_track (int input_channels, int output_channels, std::shared_p
 		--how_many;
 	}
 
+	return ret;
+
 	failed:
-	if (!new_routes.empty()) {
-		add_routes (new_routes, input_auto_connect, true, order);
+	return false;
+}
+
+/** Caller must not hold process lock
+ *  @param name_template string to use for the start of the name, or "" to use "Audio".
+ */
+list< std::shared_ptr<AudioTrack> >
+Session::new_audio_track (int input_channels, int output_channels, std::shared_ptr<RouteGroup> route_group,
+                          uint32_t how_many, string name_template, PresentationInfo::order_t order,
+                          TrackMode mode, bool input_auto_connect,
+                          bool trigger_visibility)
+{
+	RouteList routes;
+	list<std::shared_ptr<AudioTrack> > tracks;
+
+	new_audio_routes_tracks_bulk (routes,
+				      tracks,
+				      input_channels,
+				      output_channels,
+				      route_group,
+				      how_many,
+				      name_template,
+				      order,
+				      mode,
+				      input_auto_connect,
+				      trigger_visibility
+				     );
+
+	if (!routes.empty ()) {
+		add_routes (routes, input_auto_connect, true, order);
 	}
 
-	return ret;
+	return tracks;
 }
 
 /** Caller must not hold process lock.