X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fticker.cc;h=5d078952a1f01db16f0fa766a699022568717880;hb=9cb678ebcc2ca0c7993bdd182c9e6ad1f8adf09a;hp=866fa83e07057ad1e0e9c9eea7c29d051cac67f3;hpb=5ed141cd143abac95ba37c8d944ece847ba86173;p=ardour.git diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc index 866fa83e07..5d078952a1 100644 --- a/libs/ardour/ticker.cc +++ b/libs/ardour/ticker.cc @@ -1,5 +1,5 @@ /* - 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 @@ -14,68 +14,215 @@ 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)); + 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::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::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::transport_state_changed() +{ + if (_session->exporting()) { + /* no midi clock during export, for now */ 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); + } + + 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()) + 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); +} + +void MidiClockTicker::position_changed (framepos_t position) +{ + DEBUG_TRACE (PBD::DEBUG::MidiClock, string_compose ("Position change: %1\n", position)); + + _last_tick = position; +} + +void MidiClockTicker::transport_looped() +{ + 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_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; + } +} + +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; - 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; + 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 }; + _midi_port->write (_midi_clock_tick, 1, offset); } +void MidiClockTicker::send_start_event (pframes_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 (pframes_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 (pframes_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); +} + + +