library infrastructure for changing both aspects of audio file format at once

libs/ardour/ardour/session.h

@@ -1405,6 +1405,9 @@ public:
 	void start_domain_bounce (Temporal::DomainBounceInfo&);
 	void finish_domain_bounce (Temporal::DomainBounceInfo&);
 
+	void enable_file_format_reset ();
+	void disable_file_format_reset ();
+
 protected:
 	friend class AudioEngine;
 	void set_block_size (pframes_t nframes);
@@ -2415,6 +2418,7 @@ private:
 	void handle_slots_empty_status (std::weak_ptr<Route> const &);
 
 	void time_domain_changed ();
+	uint32_t _no_file_format_reset;
 };
 
 

libs/ardour/ardour/types.h

@@ -608,6 +608,13 @@ enum HeaderFormat {
 	FLAC,
 };
 
+struct LiveTraxFileFormat {
+	LiveTraxFileFormat (SampleFormat sff, HeaderFormat hff) : sf (sff), hf (hff) {}
+
+	SampleFormat sf;
+	HeaderFormat hf;
+};
+
 struct PeakData {
 	typedef Sample PeakDatum;
 

libs/ardour/session.cc

@@ -346,6 +346,7 @@ Session::Session (AudioEngine &eng,
 	, _pending_cue (-1)
 	, _active_cue (-1)
 	, tb_with_filled_slots (0)
+	, _no_file_format_reset (0)
 {
 	_suspend_save.store (0);
 	_playback_load.store (0);
@@ -6092,9 +6093,27 @@ Session::unmark_insert_id (uint32_t id)
 	}
 }
 
+void
+Session::enable_file_format_reset ()
+{
+	if (_no_file_format_reset) {
+		_no_file_format_reset--;
+	}
+}
+
+void
+Session::disable_file_format_reset ()
+{
+	_no_file_format_reset++;
+}
+
 void
 Session::reset_native_file_format ()
 {
+	if (_no_file_format_reset) {
+		return;
+	}
+
 	std::shared_ptr<RouteList const> rl = routes.reader ();
 
 	for (auto const& i : *rl) {