From 9d4a1f080db39fa4d3783717d145a75b54255201 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Sun, 12 Dec 2021 11:20:58 -0700
Subject: [PATCH] triggers: return a segment descriptor

---
 libs/ardour/ardour/triggerbox.h |  7 +++++++
 libs/ardour/triggerbox.cc       | 26 ++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/libs/ardour/ardour/triggerbox.h b/libs/ardour/ardour/triggerbox.h
index 1d287d834c..6e0e529e10 100644
--- a/libs/ardour/ardour/triggerbox.h
+++ b/libs/ardour/ardour/triggerbox.h
@@ -43,6 +43,7 @@
 #include "ardour/midi_model.h"
 #include "ardour/midi_state_tracker.h"
 #include "ardour/processor.h"
+#include "ardour/segment_descriptor.h"
 
 #include "ardour/libardour_visibility.h"
 
@@ -223,6 +224,8 @@ class LIBARDOUR_API Trigger : public PBD::Stateful {
 	double apparent_tempo() const { return _apparent_tempo; }
 	double set_tempo (double t);
 
+	virtual SegmentDescriptor get_segment_descriptor () const = 0;
+
   protected:
 	struct UIRequests {
 		std::atomic<bool> stop;
@@ -288,6 +291,8 @@ class LIBARDOUR_API AudioTrigger : public Trigger {
 
 	RubberBand::RubberBandStretcher* stretcher() { return (_stretcher); }
 
+	SegmentDescriptor get_segment_descriptor () const;
+
   protected:
 	void retrigger ();
 	void set_usable_length ();
@@ -343,6 +348,8 @@ class LIBARDOUR_API MIDITrigger : public Trigger {
 	XMLNode& get_state (void);
 	int set_state (const XMLNode&, int version);
 
+	SegmentDescriptor get_segment_descriptor () const;
+
   protected:
 	void retrigger ();
 	void set_usable_length ();
diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 5db193cc38..8a4e7096c0 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -550,6 +550,17 @@ AudioTrigger::~AudioTrigger ()
 	delete _stretcher;
 }
 
+SegmentDescriptor
+AudioTrigger::get_segment_descriptor () const
+{
+	SegmentDescriptor sd;
+
+	sd.set_extent (_start_offset, usable_length);
+	sd.set_tempo (Temporal::Tempo (_apparent_tempo, 4));
+
+	return sd;
+}
+
 void
 AudioTrigger::startup ()
 {
@@ -1133,6 +1144,21 @@ MIDITrigger::~MIDITrigger ()
 {
 }
 
+SegmentDescriptor
+MIDITrigger::get_segment_descriptor () const
+{
+	SegmentDescriptor sd;
+	boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion> (_region);
+	assert (mr);
+
+	sd.set_extent (Temporal::Beats(), mr->length().beats());
+
+	/* we don't really have tempo information for MIDI yet */
+	sd.set_tempo (Temporal::Tempo (120, 4));
+
+	return sd;
+}
+
 void
 MIDITrigger::startup ()
 {