Auto-monitor == Cue for MIDI tracks.

1 files changed, 67 insertions, 0 deletions

diff --git a/libs/ardour/audio_track.cc b/libs/ardour/audio_track.cc
index 12c2f1975b..46aff98122 100644
--- a/libs/ardour/audio_track.cc
+++ b/libs/ardour/audio_track.cc
@@ -64,6 +64,73 @@ AudioTrack::~AudioTrack ()
 	}
 }
 
+MonitorState
+AudioTrack::get_auto_monitoring_state () const
+{
+	/* This is an implementation of the truth table in doc/monitor_modes.pdf;
+	   I don't think it's ever going to be too pretty too look at.
+	*/
+
+	bool const roll = _session.transport_rolling ();
+	bool const track_rec = _disk_writer->record_enabled ();
+	bool const auto_input = _session.config.get_auto_input ();
+	bool const software_monitor = Config->get_monitoring_model() == SoftwareMonitoring;
+	bool const tape_machine_mode = Config->get_tape_machine_mode ();
+	bool session_rec;
+
+	/* I suspect that just use actively_recording() is good enough all the
+	 * time, but just to keep the semantics the same as they were before
+	 * sept 26th 2012, we differentiate between the cases where punch is
+	 * enabled and those where it is not.
+	 *
+	 * rg: sept 30 2017: Above is not the case: punch-in/out location is
+	 * global session playhead position.
+	 * When this method is called from process_output_buffers() we need
+	 * to use delay-compensated route's process-position.
+	 *
+	 * NB. Disk reader/writer may also be offset by a same amount of time.
+	 *
+	 * Also keep in mind that _session.transport_rolling() is false during
+	 * pre-roll but the disk already produces output.
+	 *
+	 * TODO: FIXME
+	 */
+
+	if (_session.config.get_punch_in() || _session.config.get_punch_out()) {
+		session_rec = _session.actively_recording ();
+	} else {
+		session_rec = _session.get_record_enabled();
+	}
+
+	if (track_rec) {
+
+		if (!session_rec && roll && auto_input) {
+			return MonitoringDisk;
+		} else {
+			return software_monitor ? MonitoringInput : MonitoringSilence;
+		}
+
+	} else {
+
+		if (tape_machine_mode) {
+
+			return MonitoringDisk;
+
+		} else {
+
+			if (!roll && auto_input) { 
+				return software_monitor ? MonitoringInput : MonitoringSilence;
+			} else {
+				return MonitoringDisk;
+			}
+
+		}
+	}
+
+	abort(); /* NOTREACHED */
+	return MonitoringSilence;
+}
+
 int
 AudioTrack::set_state (const XMLNode& node, int version)
 {