/*
- Copyright (C) 2008 Hans Baier
+ Copyright (C) 2008 Hans Baier
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
$Id$
*/
+
+#include "midi++/port.h"
+#include "midi++/manager.h"
+#include "evoral/midi_events.h"
#include "ardour/ticker.h"
#include "ardour/session.h"
+#include "ardour/tempo.h"
+
+#ifdef DEBUG_MIDI_CLOCK
+#include <iostream>
+using namespace std;
+#endif
-namespace ARDOUR
+using namespace ARDOUR;
+
+void Ticker::set_session (Session* s)
{
+ SessionHandlePtr::set_session (s);
+ if (_session) {
+ _session->tick.connect_same_thread (_session_connections, boost::bind (&Ticker::tick, this, _1, _2, _3));
+ }
+}
-void Ticker::set_session(Session& s)
+void MidiClockTicker::set_session (Session* s)
{
- _session = &s;
-
- if(_session) {
- _session->tick.connect(mem_fun (*this, &Ticker::tick));
- _session->GoingAway.connect(mem_fun (*this, &Ticker::going_away));
+ Ticker::set_session (s);
+
+ if (_session) {
+ _session->TransportStateChange.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_state_changed, this));
+ _session->PositionChanged.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::position_changed, this, _1));
+ _session->TransportLooped.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::transport_looped, this));
+ update_midi_clock_port();
}
}
+void
+MidiClockTicker::session_going_away ()
+{
+ SessionHandlePtr::session_going_away();
+ _midi_port = 0;
+}
+
+void MidiClockTicker::update_midi_clock_port()
+{
+ _midi_port = MIDI::Manager::instance()->midi_clock_output_port();
+}
-void MidiClockTicker::tick(const nframes_t& transport_frames, const BBT_Time& transport_bbt, const SMPTE::Time& transport_smpt)
+void MidiClockTicker::transport_state_changed()
{
+ if (_session->exporting()) {
+ /* no midi clock during export, for now */
+ return;
+ }
+
+ float speed = _session->transport_speed();
+ framepos_t position = _session->transport_frame();
+#ifdef DEBUG_MIDI_CLOCK
+ 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), *((Timecode::Time *)0));
+}
+
+void MidiClockTicker::position_changed (framepos_t position)
+{
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "Position changed:" << position << endl;
+#endif
+ _last_tick = position;
+}
+
+void MidiClockTicker::transport_looped()
+{
+ Location* loop_location = _session->locations()->auto_loop_location();
+ assert(loop_location);
+
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "Transport looped, position:" << _session->transport_frame()
+ << " 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)
+ framecnt_t elapsed_since_last_tick = loop_location->end() - _last_tick;
+ _last_tick = loop_location->start() - elapsed_since_last_tick;
+}
+
+void MidiClockTicker::tick (const framepos_t& transport_frames, const BBT_Time& /*transport_bbt*/, const Timecode::Time& /*transport_smpt*/)
+{
+ if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0)
+ return;
+
+ while (true) {
+ double next_tick = _last_tick + one_ppqn_in_frames(transport_frames);
+ framecnt_t next_tick_offset = framecnt_t(next_tick) - transport_frames;
+
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "Transport:" << transport_frames
+ << ":Last tick time:" << _last_tick << ":"
+ << ":Next tick time:" << next_tick << ":"
+ << "Offset:" << next_tick_offset << ":"
+ << "cycle length:" << _midi_port->nframes_this_cycle()
+ << endl;
+#endif
+
+ if (next_tick_offset >= _midi_port->nframes_this_cycle())
+ return;
+
+ send_midi_clock_event(next_tick_offset);
+
+ _last_tick = next_tick;
+ }
+}
+
+double MidiClockTicker::one_ppqn_in_frames (framepos_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);
+
+ double quarter_notes_per_beat = 4.0 / current_tempo.note_type();
+ double frames_per_quarter_note = frames_per_beat / quarter_notes_per_beat;
+
+ return frames_per_quarter_note / double (_ppqn);
+}
+
+void MidiClockTicker::send_midi_clock_event (framecnt_t offset)
+{
+ if (!_midi_port) {
+ return;
+ }
+
+ assert (MIDI::Port::is_process_thread());
+#ifdef DEBUG_MIDI_CLOCK
+ cerr << "Tick with offset " << offset << endl;
+#endif // DEBUG_MIDI_CLOCK
+ static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CLOCK };
+ _midi_port->write(_midi_clock_tick, 1, offset);
+}
+
+void MidiClockTicker::send_start_event (framecnt_t offset)
+{
+ if (!_midi_port) {
+ return;
+ }
+ static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_START };
+ _midi_port->write(_midi_clock_tick, 1, offset);
}
+void MidiClockTicker::send_continue_event (framecnt_t offset)
+{
+ if (!_midi_port) {
+ return;
+ }
+
+ static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CONTINUE };
+ _midi_port->write(_midi_clock_tick, 1, offset);
}
+void MidiClockTicker::send_stop_event (framecnt_t offset)
+{
+ if (!_midi_port) {
+ return;
+ }
+
+ static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_STOP };
+ _midi_port->write(_midi_clock_tick, 1, offset);
+}
+
+
+
projects / ardour.git / blobdiff