* reduced debugging output

[ardour.git] / libs / ardour / ticker.cc

diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc
index 866fa83e07057ad1e0e9c9eea7c29d051cac67f3..ff367c0e581e3c0001104415432b468f04edbd83 100644 (file)
--- a/libs/ardour/ticker.cc
+++ b/libs/ardour/ticker.cc
@@ -22,6 +22,8 @@
 #include "ardour/session.h"
 #include "ardour/tempo.h"
 
+#define DEBUG_TICKER 0
+
 namespace ARDOUR
 {
 
@@ -42,6 +44,9 @@ void MidiClockTicker::set_session(Session& s)
         
         if(_session) {
                 _session->MIDIClock_PortChanged.connect(mem_fun (*this, &MidiClockTicker::update_midi_clock_port));
+                _session->TransportStateChange .connect(mem_fun (*this, &MidiClockTicker::transport_state_changed));
+                _session->PositionChanged      .connect(mem_fun (*this, &MidiClockTicker::position_changed));           
+                _session->TransportLooped      .connect(mem_fun (*this, &MidiClockTicker::transport_looped));           
                 update_midi_clock_port();
         }
 }
@@ -51,13 +56,104 @@ void MidiClockTicker::update_midi_clock_port()
         _jack_port = (MIDI::JACK_MidiPort*) _session->midi_clock_port();
 }
 
+void MidiClockTicker::transport_state_changed()
+{
+       float     speed     = _session->transport_speed();
+       nframes_t position  = _session->transport_frame();
+#if DEBUG_TICKER       
+       cerr << "Transport state change, speed:" << speed << "position:" << position<< " play loop " << _session->get_play_loop() << endl;
+#endif 
+       if (speed == 1.0f) {
+               _last_tick = position;
+               
+               if (!Config->get_send_midi_clock()) 
+                       return;
+               
+               if (_session->get_play_loop()) {
+                       assert(_session->locations()->auto_loop_location());
+                       if (position == _session->locations()->auto_loop_location()->start()) {
+                               send_start_event(0);
+                       } else {
+                               send_continue_event(0);
+                       }
+               } else if (position == 0) {
+                       send_start_event(0);
+               } else {
+                       send_continue_event(0);
+               }
+               
+               send_midi_clock_event(0);
+               
+       } else if (speed == 0.0f) {
+               if (!Config->get_send_midi_clock()) 
+                       return;
+               
+               send_stop_event(0);
+       }
+       
+       tick(position, *((ARDOUR::BBT_Time *) 0), *((SMPTE::Time *)0));
+}
+
+void MidiClockTicker::position_changed(nframes_t position)
+{
+#if DEBUG_TICKER       
+       cerr << "Position changed:" << position << endl;
+#endif 
+       _last_tick = position;
+}
+
+void MidiClockTicker::transport_looped()
+{
+       nframes_t position  = _session->transport_frame();
+       
+       Location* loop_location = _session->locations()->auto_loop_location();
+       assert(loop_location);
+
+#if DEBUG_TICKER       
+       cerr << "Transport looped, position:" <<  position 
+            << " loop start " << loop_location->start( )
+            << " loop end " << loop_location->end( )
+            << " play loop " << _session->get_play_loop()
+            <<  endl;
+#endif
+       
+       // adjust _last_tick, so that the next MIDI clock message is sent 
+       // in due time (and the tick interval is still constant)
+       nframes_t elapsed_since_last_tick = loop_location->end() - _last_tick;
+       _last_tick = loop_location->start() - elapsed_since_last_tick;
+}
+
 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;
+
+       while (true) {
+               double next_tick = _last_tick + one_ppqn_in_frames(transport_frames);
+               nframes_t next_tick_offset = nframes_t(next_tick) - transport_frames;
+               
+#if DEBUG_TICKER       
+               cerr << "Transport:" << transport_frames 
+                        << ":Last tick time:" << _last_tick << ":" 
+                        << ":Next tick time:" << next_tick << ":" 
+                        << "Offset:" << next_tick_offset << ":"
+                        << "cycle length:" << _jack_port->nframes_this_cycle() 
+                        << endl; 
+#endif 
+               
+               if (next_tick_offset >= _jack_port->nframes_this_cycle())
+                       return;
        
-       const Tempo& current_tempo = _session->tempo_map().tempo_at(transport_frames);
-       const Meter& current_meter = _session->tempo_map().meter_at(transport_frames);
+               send_midi_clock_event(next_tick_offset);
+               
+               _last_tick = next_tick;
+       }
+}
+
+double MidiClockTicker::one_ppqn_in_frames(nframes_t transport_position)
+{
+       const Tempo& current_tempo = _session->tempo_map().tempo_at(transport_position);
+       const Meter& current_meter = _session->tempo_map().meter_at(transport_position);
        double frames_per_beat =
                current_tempo.frames_per_beat(_session->nominal_frame_rate(),
                                              current_meter);
@@ -65,16 +161,35 @@ void MidiClockTicker::tick(const nframes_t& transport_frames, const BBT_Time& tr
        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;
-       
+       return frames_per_quarter_note / double (_ppqn);
+}
+
+void MidiClockTicker::send_midi_clock_event(nframes_t offset)
+{
        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;
+#if DEBUG_TICKER       
+       cerr << "Tick with offset " << offset << endl;
+#endif 
+       static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CLOCK };
+       _jack_port->write(_midi_clock_tick, 1, offset);
+}
+
+void MidiClockTicker::send_start_event(nframes_t offset)
+{
+       static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_START };
+       _jack_port->write(_midi_clock_tick, 1, offset);
+}
+
+void MidiClockTicker::send_continue_event(nframes_t offset)
+{
+       static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CONTINUE };
+       _jack_port->write(_midi_clock_tick, 1, offset);
+}
+
+void MidiClockTicker::send_stop_event(nframes_t offset)
+{
+       static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_STOP };
+       _jack_port->write(_midi_clock_tick, 1, offset);
 }
 
 }