port = &p;
+#ifdef DEBUG_MIDI_CLOCK
std::cerr << "MIDIClock_Slave: connecting to port " << port->name() << std::endl;
+#endif
- connections.push_back (port->input()->timing.connect (mem_fun (*this, &MIDIClock_Slave::update_midi_clock)));
- connections.push_back (port->input()->start.connect (mem_fun (*this, &MIDIClock_Slave::start)));
- connections.push_back (port->input()->stop.connect (mem_fun (*this, &MIDIClock_Slave::stop)));
+ connections.push_back (port->input()->timing.connect (mem_fun (*this, &MIDIClock_Slave::update_midi_clock)));
+ connections.push_back (port->input()->start.connect (mem_fun (*this, &MIDIClock_Slave::start)));
+ connections.push_back (port->input()->contineu.connect (mem_fun (*this, &MIDIClock_Slave::contineu)));
+ connections.push_back (port->input()->stop.connect (mem_fun (*this, &MIDIClock_Slave::stop)));
}
-void
-MIDIClock_Slave::update_midi_clock (Parser& parser, nframes_t timestamp)
-{
- nframes_t now = timestamp;
-
- SafeTime last;
- read_current (&last);
-
- const Tempo& current_tempo = session.tempo_map().tempo_at(now);
- const Meter& current_meter = session.tempo_map().meter_at(now);
+void
+MIDIClock_Slave::calculate_one_ppqn_in_frames_at(nframes_t time)
+{
+ const Tempo& current_tempo = session.tempo_map().tempo_at(time);
+ const Meter& current_meter = session.tempo_map().meter_at(time);
double frames_per_beat =
current_tempo.frames_per_beat(session.nominal_frame_rate(),
current_meter);
double frames_per_quarter_note = frames_per_beat / quarter_notes_per_beat;
one_ppqn_in_frames = frames_per_quarter_note / double (ppqn);
+}
+
+void
+MIDIClock_Slave::update_midi_clock (Parser& parser, nframes_t timestamp)
+{
+ nframes_t now = timestamp;
+
+ SafeTime last;
+ read_current (&last);
- // for the first MIDI clock event we dont have any past
+ if (_starting) {
+ assert(last.timestamp == 0);
+ // let ardour go after first MIDI Clock Event
+ _starting = false;
+ }
+
+ calculate_one_ppqn_in_frames_at(now);
+
+ // for the first MIDI clock event we don't have any past
// data, so we assume a sane tempo
if(last.timestamp == 0) {
current_midi_clock_frame_duration = one_ppqn_in_frames;
average_midi_clock_frame_duration += accumulator[i];
average_midi_clock_frame_duration /= double(accumulator_size);
-#if 1
- JACK_MidiPort *jack_port = dynamic_cast<JACK_MidiPort *>(port);
+#ifdef DEBUG_MIDI_CLOCK
+#ifdef WITH_JACK_MIDI
+ JACK_MidiPort* jack_port = dynamic_cast<JACK_MidiPort*>(port);
pthread_t process_thread_id = 0;
if(jack_port) {
process_thread_id = jack_port->get_process_thread();
<< " reference: " << one_ppqn_in_frames
<< " average: " << average_midi_clock_frame_duration
<< std::endl;
-#endif
+#endif // DEBUG_MIDI_CLOCK
+#endif // WITH_JACK_MIDI
current.guard1++;
current.position += one_ppqn_in_frames;
nframes_t now = timestamp;
- //cerr << "MIDIClock_Slave got start message at time " << now << " session time: " << session.engine().frame_time() << endl;
-
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "MIDIClock_Slave got start message at time " << now << " session time: " << session.engine().frame_time() << endl;
+#endif
+
if(!locked()) {
cerr << "Did not start because not locked!" << endl;
return;
current_midi_clock_frame_duration = 0;
- session.request_transport_speed(one_ppqn_in_frames / double(average_midi_clock_frame_duration));
current.guard1++;
current.position = 0;
current_position = 0;
- current.timestamp = now;
+ current.timestamp = 0;
current.guard2++;
_started = true;
}
void
-MIDIClock_Slave::stop (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::contineu (Parser& parser, nframes_t timestamp)
{
- //std::cerr << "MIDIClock_Slave got stop message" << endl;
+#ifdef DEBUG_MIDI_CLOCK
+ std::cerr << "MIDIClock_Slave got continue message" << endl;
+#endif
+ start(parser, timestamp);
+}
+
+void
+MIDIClock_Slave::stop (Parser& parser, nframes_t timestamp)
+{
+#ifdef DEBUG_MIDI_CLOCK
+ std::cerr << "MIDIClock_Slave got stop message" << endl;
+#endif
+
current_midi_clock_frame_duration = 0;
current.guard1++;
}
bool
-MIDIClock_Slave::speed_and_position (float& speed, nframes_t& pos)
+MIDIClock_Slave::starting() const
{
- if (!_started) {
- speed = 0.0;
- pos = 0;
- return true;
- }
-
- nframes_t now = session.engine().frame_time();
- SafeTime last;
- read_current (&last);
+ return _starting;
+}
+bool
+MIDIClock_Slave::stop_if_no_more_clock_events(nframes_t& pos, nframes_t now, SafeTime& last)
+{
/* no timecode for 1/4 second ? conclude that its stopped */
if (last_inbound_frame &&
now > last_inbound_frame &&
now - last_inbound_frame > session.frame_rate() / 4) {
- //cerr << "No MIDI Clock frames received for some time, stopping!" << endl;
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "No MIDI Clock frames received for some time, stopping!" << endl;
+#endif
pos = last.position;
session.request_locate (pos, false);
session.request_transport_speed (0);
this->stop(*port->input(), now);
reset();
+ return true;
+ } else {
return false;
}
+}
+bool
+MIDIClock_Slave::speed_and_position (float& speed, nframes_t& pos)
+{
+ if (!_started) {
+ speed = 0.0;
+ pos = 0;
+ return true;
+ }
+
+ nframes_t now = session.engine().frame_time();
+ SafeTime last;
+ read_current (&last);
+
+ if (stop_if_no_more_clock_events(pos, now, last)) {
+ return false;
+ }
//cerr << " now: " << now << " last: " << last.timestamp;
// calculate speed
cerr << endl;
*/
- // we want start on frame 0 on the first call after a MIDI start
- if (_starting) {
- pos = 0;
- _starting = false;
- }
-
return true;
}
ARDOUR::nframes_t
MIDIClock_Slave::resolution() const
{
- return (nframes_t) one_ppqn_in_frames * 24;
+ // one beat
+ return (nframes_t) one_ppqn_in_frames * ppqn;
}
void
projects / ardour.git / blobdiff