experimental option to support LTC 29.97000 fps generators.

also change 29.97ndf frame-rate to 30000/1001.

git-svn-id: svn://localhost/ardour2/branches/3.0@13395 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/rc_option_editor.cc

@@ -1087,6 +1087,18 @@ RCOptionEditor::RCOptionEditor ()
 
 	add_option (_("Transport"), _sync_genlock);
 
+	_sync_source_2997 = new BoolOption (
+		"timecode-source-2997",
+		_("Lock to 29.9700 fps instead of 30000/1001"),
+		sigc::mem_fun (*_rc_config, &RCConfiguration::get_timecode_source_2997),
+		sigc::mem_fun (*_rc_config, &RCConfiguration::set_timecode_source_2997)
+		);
+	Gtkmm2ext::UI::instance()->set_tip
+		(_sync_genlock->tip_widget(),
+		 _("<b>When enabled</b> the external timecode source is assumed to use 29.97 fps instead of 30000/1001"));
+
+	add_option (_("Transport"), _sync_source_2997);
+
 	_ltc_port = new ComboStringOption (
 		"ltc-source-port",
 		_("LTC incoming port"),
@@ -1782,10 +1794,12 @@ RCOptionEditor::parameter_changed (string const & p)
 		case ARDOUR::LTC:
 			_sync_genlock->set_sensitive (true);
 			_sync_framerate->set_sensitive (true);
+			_sync_source_2997->set_sensitive (true);
 			break;
 		default:
 			_sync_genlock->set_sensitive (false);
 			_sync_framerate->set_sensitive (false);
+			_sync_source_2997->set_sensitive (false);
 			break;
 		}
 #ifdef HAVE_LTC

gtk2_ardour/rc_option_editor.h

@@ -46,6 +46,7 @@ private:
 	ComboOption<ARDOUR::SyncSource>* _sync_source;
 	BoolOption* _sync_framerate;
 	BoolOption* _sync_genlock;
+	BoolOption* _sync_source_2997;
 	ComboStringOption* _ltc_port;
 	HSliderOption* _ltc_volume_slider;
 	Gtk::Adjustment* _ltc_volume_adjustment;

libs/ardour/ardour/rc_configuration_vars.h

@@ -50,6 +50,7 @@ CONFIG_VARIABLE (bool, first_midi_bank_is_zero, "diplay-first-midi-bank-as-zero"
 CONFIG_VARIABLE (int, mtc_qf_speed_tolerance, "mtc-qf-speed-tolerance", 5)
 CONFIG_VARIABLE (bool, timecode_sync_frame_rate, "timecode-sync-frame-rate", true)
 CONFIG_VARIABLE (bool, timecode_source_is_synced, "timecode-source-is-synced", true)
+CONFIG_VARIABLE (bool, timecode_source_2997, "timecode-source-2997", false)
 CONFIG_VARIABLE (SyncSource, sync_source, "sync-source", JACK)
 CONFIG_VARIABLE (std::string, ltc_source_port, "ltc-source-port", "system:capture_1")
 CONFIG_VARIABLE (bool, send_ltc, "send-ltc", false)

libs/ardour/ltc_slave.cc

@@ -231,6 +231,15 @@ LTC_Slave::detect_ltc_fps(int frameno, bool df)
 	/* poll and check session TC */
 	TimecodeFormat tc_format = apparent_timecode_format();
 	TimecodeFormat cur_timecode = session.config.get_timecode_format();
+
+	if (Config->get_timecode_source_2997() && tc_format == Timecode::timecode_2997drop) {
+		tc_format = Timecode::timecode_2997000drop;
+	}
+	else
+	if (Config->get_timecode_source_2997() && tc_format == Timecode::timecode_2997) {
+		tc_format = Timecode::timecode_2997000;
+	}
+
 	if (Config->get_timecode_sync_frame_rate()) {
 		/* enforce time-code */
 		if (!did_reset_tc_format) {

libs/timecode/src/time.cc

@@ -445,12 +445,20 @@ timecode_to_frames_per_second(TimecodeFormat t)
 
 			break;
 		case timecode_2997:
-			return 29.97;
+			return (30000.0/1001.0); //29.97;
 
 			break;
 		case timecode_2997drop:
 			return (30000.0/1001.0); //29.97;
 
+			break;
+		case timecode_2997000:
+			return 29.97;
+
+			break;
+		case timecode_2997000drop:
+			return 29.97;
+
 			break;
 		case timecode_30:
 			return 30;
@@ -502,6 +510,14 @@ timecode_has_drop_frames(TimecodeFormat t)
 		case timecode_2997drop:
 			return true;
 
+			break;
+		case timecode_2997000:
+			return false;
+
+			break;
+		case timecode_2997000drop:
+			return true;
+
 			break;
 		case timecode_30:
 			return false;
@@ -554,6 +570,14 @@ timecode_format_name (TimecodeFormat const t)
 		case timecode_2997drop:
 			return "29.97 drop";
 
+			break;
+		case timecode_2997000:
+			return "29.97000";
+
+			break;
+		case timecode_2997000drop:
+			return "29.97000 drop";
+
 			break;
 		case timecode_30:
 			return "30";

libs/timecode/timecode/time.h

@@ -39,6 +39,8 @@ enum TimecodeFormat {
 	timecode_25,
 	timecode_2997,
 	timecode_2997drop,
+	timecode_2997000,
+	timecode_2997000drop,
 	timecode_30,
 	timecode_30drop,
 	timecode_5994,