X-Git-Url: https://main.carlh.net/gitweb/?p=ardour.git;a=blobdiff_plain;f=libs%2Fardour%2Fticker.cc;h=def219a4331654aea57d154fc2ce808c7318ddc3;hp=98f0632c45c6ef71fa761c6b21f200f2d35cb3f5;hb=c8c6bca6587450ff64303dbc994a4cd28d6ce7aa;hpb=648a169d8ff9987ba727e9ba50af4f33da6db165 diff --git a/libs/ardour/ticker.cc b/libs/ardour/ticker.cc index 98f0632c45..def219a433 100644 --- a/libs/ardour/ticker.cc +++ b/libs/ardour/ticker.cc @@ -14,161 +14,302 @@ 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 "midi++/port.h" -#include "midi++/manager.h" +#include "pbd/compose.h" +#include "pbd/stacktrace.h" + #include "evoral/midi_events.h" + +#include "ardour/async_midi_port.h" +#include "ardour/audioengine.h" +#include "ardour/midi_buffer.h" +#include "ardour/midi_port.h" +#include "ardour/lmath.h" #include "ardour/ticker.h" #include "ardour/session.h" #include "ardour/tempo.h" - -#ifdef DEBUG_MIDI_CLOCK -#include -using namespace std; -#endif +#include "ardour/debug.h" using namespace ARDOUR; +using namespace PBD; -void Ticker::set_session (Session* s) +/** MIDI Clock Position tracking */ +class MidiClockTicker::Position : public Timecode::BBT_Time { - SessionHandlePtr::set_session (s); +public: - if (_session) { - _session->tick.connect_same_thread (_session_connections, boost::bind (&Ticker::tick, this, _1, _2, _3)); - } + Position() : speed(0.0f), frame(0), midi_beats(0) { } + ~Position() { } + + /** Sync timing information taken from the given Session + * @return True if timings differed + */ + + bool sync (Session* s) { + + bool changed = false; + + double sp = s->transport_speed(); + framecnt_t fr = s->transport_frame(); + + if (speed != sp) { + speed = sp; + changed = true; + } + + if (frame != fr) { + frame = fr; + changed = true; + } + + /* Midi beats and clocks always gets updated for now */ + + s->bbt_time (this->frame, *this); + + const TempoMap& tempo = s->tempo_map(); + const Meter& meter = tempo.meter_at_frame (frame); + + const double divisions = meter.divisions_per_bar(); + const double divisor = meter.note_divisor(); + const double qnote_scale = divisor * 0.25f; + double mb; + + /** Midi Beats in terms of Song Position Pointer is equivalent to total + * sixteenth notes at 'time' + */ + + mb = (((bars - 1) * divisions) + beats - 1); + mb += (double)ticks / (double)Position::ticks_per_beat * qnote_scale; + mb *= 16.0f / divisor; + + if (mb != midi_beats) { + midi_beats = mb; + midi_clocks = midi_beats * 6.0f; + changed = true; + } + + return changed; + } + + double speed; + framecnt_t frame; + double midi_beats; + double midi_clocks; + + void print (std::ostream& s) { + s << "frames: " << frame << " midi beats: " << midi_beats << " speed: " << speed; + } +}; + + +MidiClockTicker::MidiClockTicker () + : _ppqn (24) + , _last_tick (0.0) + , _send_pos (false) + , _send_state (false) +{ + _pos.reset (new Position()); +} + +MidiClockTicker::~MidiClockTicker() +{ + _pos.reset (0); } -void MidiClockTicker::set_session (Session* s) +void +MidiClockTicker::set_session (Session* s) { - Ticker::set_session (s); + 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)); + _session->Located.connect_same_thread (_session_connections, boost::bind (&MidiClockTicker::session_located, this)); + update_midi_clock_port(); + _pos->sync (_session); } } +void +MidiClockTicker::session_located() +{ + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Session Located: %1, speed: %2\n", _session->transport_frame(), _session->transport_speed())); + + if (!_session || !_pos->sync (_session)) { + return; + } + + _last_tick = _pos->frame; + + if (!Config->get_send_midi_clock()) { + return; + } + + _send_pos = true; +} + void MidiClockTicker::session_going_away () { - SessionHandlePtr::session_going_away(); - _midi_port = 0; + SessionHandlePtr::session_going_away(); + _midi_port.reset (); } -void MidiClockTicker::update_midi_clock_port() +void +MidiClockTicker::update_midi_clock_port() { - _midi_port = MIDI::Manager::instance()->midi_clock_output_port(); + _midi_port = _session->midi_clock_output_port(); } -void MidiClockTicker::transport_state_changed() +void +MidiClockTicker::transport_state_changed() { if (_session->exporting()) { /* no midi clock during export, for now */ return; } - float speed = _session->transport_speed(); - nframes_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->engine().running()) { + /* Engine stopped, we can't do anything */ + 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); - } + if (! _pos->sync (_session)) { + return; + } - send_midi_clock_event(0); + DEBUG_TRACE (DEBUG::MidiClock, + string_compose ("Transport state change @ %4, speed: %1 position: %2 play loop: %3\n", + _pos->speed, _pos->frame, _session->get_play_loop(), _pos->frame) + ); - } else if (speed == 0.0f) { - if (!Config->get_send_midi_clock()) - return; + _last_tick = _pos->frame; - send_stop_event(0); + if (! Config->get_send_midi_clock()) { + return; } - tick(position, *((ARDOUR::BBT_Time *) 0), *((Timecode::Time *)0)); -} + _send_state = true; -void MidiClockTicker::position_changed(nframes_t position) -{ -#ifdef DEBUG_MIDI_CLOCK - cerr << "Position changed:" << position << endl; -#endif - _last_tick = position; + // tick (_pos->frame); } -void MidiClockTicker::transport_looped() +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 + DEBUG_TRACE (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) - nframes_t elapsed_since_last_tick = loop_location->end() - _last_tick; - _last_tick = loop_location->start() - elapsed_since_last_tick; + + 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 nframes_t& transport_frames, const BBT_Time& /*transport_bbt*/, const Timecode::Time& /*transport_smpt*/) +void +MidiClockTicker::tick (const framepos_t& /* transport_frame */, pframes_t nframes) { - if (!Config->get_send_midi_clock() || _session == 0 || _session->transport_speed() != 1.0f || _midi_port == 0) + if (!Config->get_send_midi_clock() || _session == 0 || _midi_port == 0) { + return; + } + + if (_send_pos) { + if (_pos->speed == 0.0f) { + send_position_event (llrint (_pos->midi_beats), 0, nframes); + } else if (_pos->speed == 1.0f) { + send_stop_event (0, nframes); + + if (_pos->frame == 0) { + send_start_event (0, nframes); + } else { + send_position_event (llrint (_pos->midi_beats), 0, nframes); + send_continue_event (0, nframes); + } + } else { + /* Varispeed not supported */ + } + + _send_pos = false; + } + + + if (_send_state) { + if (_pos->speed == 1.0f) { + if (_session->get_play_loop()) { + assert(_session->locations()->auto_loop_location()); + + if (_pos->frame == _session->locations()->auto_loop_location()->start()) { + send_start_event (0, nframes); + } else { + send_continue_event (0, nframes); + } + + } else if (_pos->frame == 0) { + send_start_event (0, nframes); + } else { + send_continue_event (0, nframes); + } + + // send_midi_clock_event (0); + + } else if (_pos->speed == 0.0f) { + send_stop_event (0, nframes); + send_position_event (llrint (_pos->midi_beats), 0, nframes); + } + + _send_state = false; + } + + if (_session->transport_speed() != 1.0f) { + /* no varispeed support and nothing to do after this if stopped */ return; + } + + const framepos_t end = _pos->frame + nframes; + double iter = _last_tick; while (true) { - double next_tick = _last_tick + one_ppqn_in_frames(transport_frames); - nframes_t next_tick_offset = nframes_t(next_tick) - transport_frames; + double clock_delta = one_ppqn_in_frames (llrint (iter)); + double next_tick = iter + clock_delta; + frameoffset_t next_tick_offset = llrint (next_tick) - end; -#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 + DEBUG_TRACE (DEBUG::MidiClock, + string_compose ("Tick: iter: %1, last tick time: %2, next tick time: %3, offset: %4, cycle length: %5\n", + iter, _last_tick, next_tick, next_tick_offset, nframes)); - if (next_tick_offset >= _midi_port->nframes_this_cycle()) - return; + if (next_tick_offset >= nframes) { + break; + } - send_midi_clock_event(next_tick_offset); + if (next_tick_offset >= 0) { + send_midi_clock_event (next_tick_offset, nframes); + } - _last_tick = next_tick; + iter = next_tick; } + + _last_tick = iter; + _pos->frame = end; } -double MidiClockTicker::one_ppqn_in_frames(nframes_t transport_position) +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); + const Tempo& current_tempo = _session->tempo_map().tempo_at_frame (transport_position); + double frames_per_beat = _session->tempo_map().frames_per_beat_at (transport_position, _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; @@ -176,49 +317,85 @@ double MidiClockTicker::one_ppqn_in_frames(nframes_t transport_position) return frames_per_quarter_note / double (_ppqn); } -void MidiClockTicker::send_midi_clock_event(nframes_t offset) +void +MidiClockTicker::send_midi_clock_event (pframes_t offset, pframes_t nframes) { 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); + static uint8_t msg = MIDI_CMD_COMMON_CLOCK; + + MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); + mb.push_back (offset, 1, &msg); + + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Tick with offset %1\n", offset)); } -void MidiClockTicker::send_start_event(nframes_t offset) +void +MidiClockTicker::send_start_event (pframes_t offset, pframes_t nframes) { if (!_midi_port) { return; } - - static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_START }; - _midi_port->write(_midi_clock_tick, 1, offset); + + static uint8_t msg = { MIDI_CMD_COMMON_START }; + MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); + mb.push_back (offset, 1, &msg); + + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Start %1\n", _last_tick)); } -void MidiClockTicker::send_continue_event(nframes_t offset) +void +MidiClockTicker::send_continue_event (pframes_t offset, pframes_t nframes) { if (!_midi_port) { return; } - - static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_CONTINUE }; - _midi_port->write(_midi_clock_tick, 1, offset); + + static uint8_t msg = { MIDI_CMD_COMMON_CONTINUE }; + MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); + mb.push_back (offset, 1, &msg); + + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Continue %1\n", _last_tick)); } -void MidiClockTicker::send_stop_event(nframes_t offset) +void +MidiClockTicker::send_stop_event (pframes_t offset, pframes_t nframes) { if (!_midi_port) { return; } - - static uint8_t _midi_clock_tick[1] = { MIDI_CMD_COMMON_STOP }; - _midi_port->write(_midi_clock_tick, 1, offset); + + static uint8_t msg = MIDI_CMD_COMMON_STOP; + MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); + mb.push_back (offset, 1, &msg); + + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Stop %1\n", _last_tick)); } +void +MidiClockTicker::send_position_event (uint32_t midi_beats, pframes_t offset, pframes_t nframes) +{ + if (!_midi_port) { + return; + } + + /* can only use 14bits worth */ + if (midi_beats > 0x3fff) { + return; + } + /* split midi beats into a 14bit value */ + MIDI::byte msg[3]; + msg[0] = MIDI_CMD_COMMON_SONG_POS; + msg[1] = midi_beats & 0x007f; + msg[2] = midi_beats >> 7; + MidiBuffer& mb (_midi_port->get_midi_buffer (nframes)); + mb.push_back (offset, 3, &msg[0]); + + DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Song Position Sent: %1 to %2 (events now %3, buf = %4)\n", midi_beats, _midi_port->name(), + mb.size(), &mb)); + +}