* added Menu for sending midi clock

* hooked up MidiClockTicker to the session


git-svn-id: svn://localhost/ardour2/branches/3.0@4267 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 38 insertions, 1 deletions

diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc
index bf84bba92b..866fa83e07 100644
--- a/libs/ardour/ticker.cc
+++ b/libs/ardour/ticker.cc
@@ -17,8 +17,10 @@
 
     $Id$
 */
+
 #include "ardour/ticker.h"
 #include "ardour/session.h"
+#include "ardour/tempo.h"
 
 namespace ARDOUR
 {
@@ -34,10 +36,45 @@ void Ticker::set_session(Session& s)
 	 }
 }
 
+void MidiClockTicker::set_session(Session& s) 
+{
+	 Ticker::set_session(s);
+	 
+	 if(_session) {
+		 _session->MIDIClock_PortChanged.connect(mem_fun (*this, &MidiClockTicker::update_midi_clock_port));
+		 update_midi_clock_port();
+	 }
+}
 
-void MidiClockTicker::tick(const nframes_t& transport_frames, const BBT_Time& transport_bbt, const SMPTE::Time& transport_smpt)
+void MidiClockTicker::update_midi_clock_port()
 {
+	 _jack_port = (MIDI::JACK_MidiPort*) _session->midi_clock_port();
+}
+
+void MidiClockTicker::tick(const nframes_t& transport_frames, const BBT_Time& transport_bbt, const SMPTE::Time& transport_smpt)
+{	
+	if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f)
+		return;
+	
+	const Tempo& current_tempo = _session->tempo_map().tempo_at(transport_frames);
+	const Meter& current_meter = _session->tempo_map().meter_at(transport_frames);
+	double frames_per_beat =
+		current_tempo.frames_per_beat(_session->nominal_frame_rate(),
+		                              current_meter);
+
+	double quarter_notes_per_beat = 4.0 / current_tempo.note_type();
+	double frames_per_quarter_note = frames_per_beat / quarter_notes_per_beat;
+
+	nframes_t one_ppqn_in_frames = frames_per_quarter_note / double (_ppqn);
+	
+	nframes_t next_tick = _last_tick + one_ppqn_in_frames;
+	nframes_t next_tick_offset = next_tick - transport_frames;
+	
+	assert(_jack_port->is_process_thread());
+	static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_TICK };
+	_jack_port->write(_midi_clock_tick, 1, next_tick_offset);
 	
+	_last_tick = next_tick;
 }
 
 }