/*
- 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
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id$
*/
+#include "pbd/compose.h"
+#include "pbd/stacktrace.h"
+
+#include "midi++/port.h"
+#include "midi++/jack_midi_port.h"
+#include "midi++/manager.h"
+
+#include "evoral/midi_events.h"
+
+#include "ardour/audioengine.h"
#include "ardour/ticker.h"
#include "ardour/session.h"
#include "ardour/tempo.h"
+#include "ardour/debug.h"
-namespace ARDOUR
-{
-
+using namespace ARDOUR;
-void Ticker::set_session(Session& s)
+MidiClockTicker::MidiClockTicker ()
+ : _midi_port (0)
+ , _ppqn (24)
+ , _last_tick (0.0)
{
- _session = &s;
-
- if(_session) {
- _session->tick.connect(mem_fun (*this, &Ticker::tick));
- _session->GoingAway.connect(mem_fun (*this, &Ticker::going_away));
- }
}
-void MidiClockTicker::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));
- _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));
+ SessionHandlePtr::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::update_midi_clock_port()
+void
+MidiClockTicker::session_going_away ()
+{
+ SessionHandlePtr::session_going_away();
+ _midi_port = 0;
+}
+
+void
+MidiClockTicker::update_midi_clock_port()
{
- _jack_port = (MIDI::JACK_MidiPort*) _session->midi_clock_port();
+ _midi_port = MIDI::Manager::instance()->midi_clock_output_port();
}
-void MidiClockTicker::transport_state_changed()
+void
+MidiClockTicker::transport_state_changed()
{
- float speed = _session->transport_speed();
- nframes_t position = _session->transport_frame();
- //cerr << "Transport state change, speed:" << speed << "position:" << position << endl;
+ if (_session->exporting()) {
+ /* no midi clock during export, for now */
+ return;
+ }
+
+ if (!_session->engine().running()) {
+ /* Engine stopped, we can't do anything */
+ return;
+ }
+
+ float speed = _session->transport_speed();
+ framepos_t position = _session->transport_frame();
+
+ DEBUG_TRACE (PBD::DEBUG::MidiClock,
+ string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n", speed, position, _session->get_play_loop(), position)
+ );
+
if (speed == 1.0f) {
_last_tick = position;
-
- if (!Config->get_send_midi_clock())
+
+ if (!Config->get_send_midi_clock())
return;
-
- if (position == 0) {
+
+ 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())
+ if (!Config->get_send_midi_clock())
return;
-
+
send_stop_event(0);
+ send_position_event (position, 0);
}
+
+ tick (position);
}
-void MidiClockTicker::position_changed(nframes_t position)
+void
+MidiClockTicker::position_changed (framepos_t position)
{
- cerr << "Position changed:" << position << endl;
+ const double speed = _session->transport_speed();
+ DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Transport Position Change: %1, speed: %2\n", position, speed));
+
+ if (speed == 0.0f && Config->get_send_midi_clock()) {
+ send_position_event (position, 0);
+ }
+
_last_tick = position;
}
-void MidiClockTicker::transport_looped()
+void
+MidiClockTicker::transport_looped()
{
- nframes_t position = _session->transport_frame();
-
- cerr << "Transport looped, position:" << position << endl;
+ Location* loop_location = _session->locations()->auto_loop_location();
+ assert(loop_location);
+
+ DEBUG_TRACE (PBD::DEBUG::MidiClock,
+ string_compose ("Transport looped, position: %1, loop start: %2, loop end: %3, play loop: %4\n",
+ _session->transport_frame(), loop_location->start(), loop_location->end(), _session->get_play_loop())
+ );
+
+ // 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;
+
+ if (loop_location->start() > elapsed_since_last_tick) {
+ _last_tick = loop_location->start() - elapsed_since_last_tick;
+ } else {
+ _last_tick = 0;
+ }
+}
+
+void
+MidiClockTicker::tick (const framepos_t& transport_frame)
+{
+ 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_frame);
+ frameoffset_t next_tick_offset = llrint (next_tick) - transport_frame;
+
+ MIDI::JackMIDIPort* mp = dynamic_cast<MIDI::JackMIDIPort*> (_midi_port);
+
+ /*
+ DEBUG_TRACE (PBD::DEBUG::MidiClock,
+ string_compose ("Transport: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n",
+ transport_frame, _last_tick, next_tick, next_tick_offset, mp ? mp->nframes_this_cycle() : 0));
+ */
+
+ if (!mp || (next_tick_offset >= mp->nframes_this_cycle())) {
+ break;
+ }
+
+ if (next_tick_offset >= 0) {
+ send_midi_clock_event (next_tick_offset);
+ }
+
+ _last_tick = next_tick;
+ }
}
-void MidiClockTicker::send_midi_clock_event(nframes_t offset)
+double
+MidiClockTicker::one_ppqn_in_frames (framepos_t transport_position)
{
+ const Tempo& current_tempo = _session->tempo_map().tempo_at (transport_position);
+ double frames_per_beat = current_tempo.frames_per_beat (_session->nominal_frame_rate());
+
+ 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 (pframes_t offset)
+{
+ if (!_midi_port) {
+ return;
+ }
+
+ // DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Tick with offset %1\n", offset));
+
static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CLOCK };
- _jack_port->write(_midi_clock_tick, 1, offset);
+ _midi_port->write (_midi_clock_tick, 1, offset);
}
-void MidiClockTicker::send_start_event(nframes_t offset)
+void
+MidiClockTicker::send_start_event (pframes_t offset)
{
+ if (!_midi_port) {
+ return;
+ }
+
+ DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Start %1\n", _last_tick));
+
static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_START };
- _jack_port->write(_midi_clock_tick, 1, offset);
+ _midi_port->write (_midi_clock_tick, 1, offset);
}
-void MidiClockTicker::send_continue_event(nframes_t offset)
+void
+MidiClockTicker::send_continue_event (pframes_t offset)
{
+ if (!_midi_port) {
+ return;
+ }
+
+ DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Continue %1\n", _last_tick));
+
static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CONTINUE };
- _jack_port->write(_midi_clock_tick, 1, offset);
+ _midi_port->write (_midi_clock_tick, 1, offset);
}
-void MidiClockTicker::send_stop_event(nframes_t offset)
+void
+MidiClockTicker::send_stop_event (pframes_t offset)
{
+ if (!_midi_port) {
+ return;
+ }
+
+ DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Stop %1\n", _last_tick));
+
static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_STOP };
- _jack_port->write(_midi_clock_tick, 1, offset);
+ _midi_port->write (_midi_clock_tick, 1, offset);
}
-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)
+void
+MidiClockTicker::send_position_event (framepos_t transport_position, pframes_t offset)
+{
+ if (_midi_port == 0 || _session == 0 || _session->engine().freewheeling()) {
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;
+ const TempoMap& tempo = _session->tempo_map();
- double one_ppqn_in_frames = frames_per_quarter_note / double (_ppqn);
-
- double next_tick = _last_tick + one_ppqn_in_frames;
- nframes_t next_tick_offset = nframes_t(next_tick) - transport_frames;
-
- //cerr << "Transport:" << transport_frames << ":Next tick time:" << next_tick << ":" << "Offset:" << next_tick_offset << endl;
-
- if (next_tick_offset >= _jack_port->nframes_this_cycle())
+ Timecode::BBT_Time time;
+ _session->bbt_time (transport_position, time);
+ const double beats_per_bar = tempo.meter_at(transport_position).divisions_per_bar();
+
+ /* Midi Beats in terms of Song Position Pointer is equivalent to total
+ sixteenth notes at 'time' */
+ const uint32_t midi_beats = 4 * (((time.bars - 1) * beats_per_bar) + time.beats - 1);
+
+ /* can only use 14bits worth */
+ if (midi_beats > 0x3fff) {
return;
-
- assert(_jack_port->is_process_thread());
+ }
- send_midi_clock_event(next_tick_offset);
-
- _last_tick = next_tick;
-}
+ /* split midi beats into a 14bit value */
+ MIDI::byte msg[3] = {
+ MIDI_CMD_COMMON_SONG_POS,
+ midi_beats & 0x007f,
+ midi_beats & 0x3f80
+ };
-}
+ DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Song Position: %1\n", midi_beats));
+ _midi_port->midimsg (msg, sizeof (msg), offset);
+}
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