X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=libs%2Fardour%2Fmidi_clock_slave.cc;h=3a43580d648c79fe028311fae3c884268799aa9d;hb=7d96960b162d25da87c388a3083775e8770bba56;hp=2f8ff9d2917e4734c19cdb1b4133dbe1b421f2d0;hpb=ea54d26111e1c3e2ba46809caa7f8a8aaaa93dbc;p=ardour.git diff --git a/libs/ardour/midi_clock_slave.cc b/libs/ardour/midi_clock_slave.cc index 2f8ff9d291..3a43580d64 100644 --- a/libs/ardour/midi_clock_slave.cc +++ b/libs/ardour/midi_clock_slave.cc @@ -1,5 +1,6 @@ /* - Copyright (C) 2008 Hans Baier + Copyright (C) 2008 Paul Davis + Author: 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 @@ -21,65 +22,74 @@ #include #include #include -#include -#include -#include +#include "pbd/error.h" +#include "pbd/failed_constructor.h" +#include "pbd/pthread_utils.h" -#include -#include -#include -#include -#include -#include -#include +#include "midi++/port.h" +#include "midi++/jack.h" +#include "ardour/slave.h" +#include "ardour/session.h" +#include "ardour/audioengine.h" +#include "ardour/cycles.h" +#include "ardour/tempo.h" #include "i18n.h" +using namespace std; using namespace ARDOUR; -using namespace sigc; using namespace MIDI; using namespace PBD; MIDIClock_Slave::MIDIClock_Slave (Session& s, MIDI::Port& p, int ppqn) - : session (s) - , ppqn (ppqn) + : ppqn (ppqn) , bandwidth (30.0 / 60.0) // 1 BpM = 1 / 60 Hz { + session = (ISlaveSessionProxy *) new SlaveSessionProxy(s); rebind (p); reset (); } +MIDIClock_Slave::MIDIClock_Slave (ISlaveSessionProxy* session_proxy, int ppqn) + : session(session_proxy) + , ppqn (ppqn) + , bandwidth (30.0 / 60.0) // 1 BpM = 1 / 60 Hz +{ + session = session_proxy; + reset (); +} + MIDIClock_Slave::~MIDIClock_Slave() { + delete session; } void MIDIClock_Slave::rebind (MIDI::Port& p) { - for (vector::iterator i = connections.begin(); i != connections.end(); ++i) { - (*i).disconnect (); - } + port_connections.drop_connections(); port = &p; - #ifdef DEBUG_MIDI_CLOCK - std::cerr << "MIDIClock_Slave: connecting to port " << port->name() << std::endl; - #endif +#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()->contineu.connect (mem_fun (*this, &MIDIClock_Slave::contineu))); - connections.push_back (port->input()->stop.connect (mem_fun (*this, &MIDIClock_Slave::stop))); + port->input()->timing.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::update_midi_clock, this, _1, _2)); + port->input()->start.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::start, this, _1, _2)); + port->input()->contineu.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::contineu, this, _1, _2)); + port->input()->stop.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::stop, this, _1, _2)); + port->input()->position.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::position, this, _1, _2, 3)); } -void -MIDIClock_Slave::calculate_one_ppqn_in_frames_at(nframes_t time) +void +MIDIClock_Slave::calculate_one_ppqn_in_frames_at(nframes64_t time) { - const Tempo& current_tempo = session.tempo_map().tempo_at(time); - const Meter& current_meter = session.tempo_map().meter_at(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.frame_rate(), + current_tempo.frames_per_beat(session->frame_rate(), current_meter); double quarter_notes_per_beat = 4.0 / current_tempo.note_type(); @@ -88,117 +98,197 @@ MIDIClock_Slave::calculate_one_ppqn_in_frames_at(nframes_t time) one_ppqn_in_frames = frames_per_quarter_note / double (ppqn); } -void +ARDOUR::nframes64_t +MIDIClock_Slave::calculate_song_position(uint16_t song_position_in_sixteenth_notes) +{ + nframes64_t song_position_frames = 0; + for (uint16_t i = 1; i <= song_position_in_sixteenth_notes; ++i) { + // one quarter note contains ppqn pulses, so a sixteenth note is ppqn / 4 pulses + calculate_one_ppqn_in_frames_at(song_position_frames); + song_position_frames += one_ppqn_in_frames * (nframes64_t)(ppqn / 4); + } + + return song_position_frames; +} + +void MIDIClock_Slave::calculate_filter_coefficients() { // omega = 2 * PI * Bandwidth / MIDI clock frame frequency in Hz - omega = 2.0 * 3.14159265358979323846 * bandwidth * one_ppqn_in_frames / session.frame_rate(); + omega = 2.0 * 3.14159265358979323846 * bandwidth * one_ppqn_in_frames / session->frame_rate(); b = 1.4142135623730950488 * omega; - c = omega * omega; + c = omega * omega; } void -MIDIClock_Slave::update_midi_clock (Parser& parser, nframes_t timestamp) -{ - // the number of midi clock messages (zero-based) - static long midi_clock_count; - - calculate_one_ppqn_in_frames_at(last_position); - - nframes_t timestamp_relative_to_transport = timestamp - first_timestamp; - - if (_starting) { +MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, nframes64_t timestamp) +{ + // some pieces of hardware send MIDI Clock all the time + if ( (!_starting) && (!_started) ) { + return; + } + + calculate_one_ppqn_in_frames_at(should_be_position); + + nframes64_t elapsed_since_start = timestamp - first_timestamp; + double error = 0; + + if (_starting || last_timestamp == 0) { midi_clock_count = 0; - assert(last_timestamp == 0); - assert(last_position == 0); - + first_timestamp = timestamp; - timestamp_relative_to_transport = 0; - + elapsed_since_start = should_be_position; + // calculate filter coefficients calculate_filter_coefficients(); - + // initialize DLL - e2 = double(one_ppqn_in_frames) / double(session.frame_rate()); - t0 = double(timestamp_relative_to_transport) / double(session.frame_rate()); + e2 = double(one_ppqn_in_frames) / double(session->frame_rate()); + t0 = double(elapsed_since_start) / double(session->frame_rate()); t1 = t0 + e2; - + // let ardour go after first MIDI Clock Event _starting = false; - } else { + } else { midi_clock_count++; - last_position += one_ppqn_in_frames; + should_be_position += one_ppqn_in_frames; calculate_filter_coefficients(); // calculate loop error - // we use session.transport_frame() instead of t1 here - // because t1 is used to calculate the transport speed, and since this - // is float, the loop will compensate for accumulating rounding errors - e = (double(last_position) - double(session.transport_frame())) - / double(session.frame_rate()); - + // we use session->transport_frame() instead of t1 here + // because t1 is used to calculate the transport speed, + // so the loop will compensate for accumulating rounding errors + error = (double(should_be_position) - double(session->audible_frame())); + e = error / double(session->frame_rate()); + // update DLL t0 = t1; t1 += b * e + e2; e2 += c * e; - - } - - #ifdef DEBUG_MIDI_CLOCK - std::cerr + } + + #ifdef DEBUG_MIDI_CLOCK + cerr << "MIDI Clock #" << midi_clock_count - //<< "@" << timestamp - << " (transport-relative: " << timestamp_relative_to_transport << " should be: " << last_position << ", delta: " << (double(last_position) - double(session.transport_frame())) <<" )" - << " transport: " << session.transport_frame() - //<< " engine: " << session.engine().frame_time() - << " real delta: " << timestamp - last_timestamp - << " reference: " << one_ppqn_in_frames - << " t1-t0: " << (t1 -t0) * session.frame_rate() - << " t0: " << t0 * session.frame_rate() - << " t1: " << t1 * session.frame_rate() - << " frame-rate: " << session.frame_rate() - << std::endl; + //<< "@" << timestamp + << " arrived at: " << elapsed_since_start << " (elapsed time) " + << " should-be transport: " << should_be_position + << " audible: " << session->audible_frame() + << " real transport: " << session->transport_frame() + << " error: " << error + //<< " engine: " << session->frame_time() + << " real delta: " << timestamp - last_timestamp + << " should-be delta: " << one_ppqn_in_frames + << " t1-t0: " << (t1 -t0) * session->frame_rate() + << " t0: " << t0 * session->frame_rate() + << " t1: " << t1 * session->frame_rate() + << " frame-rate: " << session->frame_rate() + << endl; + + cerr << "frames since cycle start: " << session->frames_since_cycle_start() << endl; #endif // DEBUG_MIDI_CLOCK last_timestamp = timestamp; } void -MIDIClock_Slave::start (Parser& parser, nframes_t timestamp) -{ - #ifdef DEBUG_MIDI_CLOCK - cerr << "MIDIClock_Slave got start message at time " << timestamp << " session time: " << session.engine().frame_time() << endl; +MIDIClock_Slave::start (Parser& /*parser*/, nframes64_t /*timestamp*/) +{ + #ifdef DEBUG_MIDI_CLOCK + cerr << "MIDIClock_Slave got start message at time " << timestamp << " engine time: " << session->frame_time() << endl; #endif - - last_position = 0; + + if (!_started) { + reset(); + + _started = true; + _starting = true; + } +} + +void +MIDIClock_Slave::reset () +{ + + should_be_position = 0; last_timestamp = 0; - - _started = true; - _starting = true; + + _starting = false; + _started = false; + + session->request_locate(0, false); } void -MIDIClock_Slave::contineu (Parser& parser, nframes_t timestamp) +MIDIClock_Slave::contineu (Parser& /*parser*/, nframes64_t /*timestamp*/) { - #ifdef DEBUG_MIDI_CLOCK + #ifdef DEBUG_MIDI_CLOCK std::cerr << "MIDIClock_Slave got continue message" << endl; #endif - start(parser, timestamp); + if (!_started) { + _starting = true; + _started = true; + } } void -MIDIClock_Slave::stop (Parser& parser, nframes_t timestamp) +MIDIClock_Slave::stop (Parser& /*parser*/, nframes64_t /*timestamp*/) { - #ifdef DEBUG_MIDI_CLOCK + #ifdef DEBUG_MIDI_CLOCK std::cerr << "MIDIClock_Slave got stop message" << endl; #endif - - last_position = 0; + + if (_started || _starting) { + _starting = false; + _started = false; + // locate to last MIDI clock position + session->request_transport_speed(0.0); + + // we need to go back to the last MIDI beat (6 ppqn) + // and lets hope the tempo didnt change in the meantime :) + + // begin at the should be position, because + // that is the position of the last MIDI Clock + // message and that is probably what the master + // expects where we are right now + nframes64_t stop_position = should_be_position; + + // find out the last MIDI beat: go back #midi_clocks mod 6 + // and lets hope the tempo didnt change in those last 6 beats :) + stop_position -= (midi_clock_count % 6) * one_ppqn_in_frames; + + session->request_locate(stop_position, false); + should_be_position = stop_position; + last_timestamp = 0; + } +} + +void +MIDIClock_Slave::position (Parser& /*parser*/, byte* message, size_t size) +{ + // we are note supposed to get position messages while we are running + // so lets be robust and ignore those + if (_started || _starting) { + return; + } + + assert(size == 3); + byte lsb = message[1]; + byte msb = message[2]; + assert((lsb <= 0x7f) && (msb <= 0x7f)); + + uint16_t position_in_sixteenth_notes = (uint16_t(msb) << 7) | uint16_t(lsb); + nframes64_t position_in_frames = calculate_song_position(position_in_sixteenth_notes); + + #ifdef DEBUG_MIDI_CLOCK + cerr << "Song Position: " << position_in_sixteenth_notes << " frames: " << position_in_frames << endl; + #endif + + session->request_locate(position_in_frames, false); + should_be_position = position_in_frames; last_timestamp = 0; - - _started = false; - reset(); + } bool @@ -220,20 +310,18 @@ MIDIClock_Slave::starting() const } bool -MIDIClock_Slave::stop_if_no_more_clock_events(nframes_t& pos, nframes_t now) +MIDIClock_Slave::stop_if_no_more_clock_events(nframes64_t& pos, nframes64_t now) { /* no timecode for 1/4 second ? conclude that its stopped */ - if (last_timestamp && - now > last_timestamp && - now - last_timestamp > session.frame_rate() / 4) { - #ifdef DEBUG_MIDI_CLOCK + if (last_timestamp && + now > last_timestamp && + now - last_timestamp > session->frame_rate() / 4) { + #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(); + #endif + pos = should_be_position; + session->request_transport_speed (0); + session->request_locate (should_be_position, false); return true; } else { return false; @@ -241,35 +329,38 @@ MIDIClock_Slave::stop_if_no_more_clock_events(nframes_t& pos, nframes_t now) } bool -MIDIClock_Slave::speed_and_position (float& speed, nframes_t& pos) +MIDIClock_Slave::speed_and_position (double& speed, nframes64_t& pos) { if (!_started || _starting) { speed = 0.0; - pos = 0; + pos = should_be_position; return true; } - - nframes_t engine_now = session.engine().frame_time(); + + nframes64_t engine_now = session->frame_time(); if (stop_if_no_more_clock_events(pos, engine_now)) { return false; } // calculate speed - double speed_double = ((t1 - t0) * session.frame_rate()) / one_ppqn_in_frames; - speed = float(speed_double); - + speed = ((t1 - t0) * session->frame_rate()) / one_ppqn_in_frames; + // calculate position if (engine_now > last_timestamp) { // we are in between MIDI clock messages // so we interpolate position according to speed - nframes_t elapsed = engine_now - last_timestamp; - pos = nframes_t (last_position + double(elapsed) * speed_double); + nframes64_t elapsed = engine_now - last_timestamp; + pos = (nframes64_t) (should_be_position + double(elapsed) * speed); } else { // A new MIDI clock message has arrived this cycle - pos = last_position; + pos = should_be_position; } + #ifdef DEBUG_MIDI_CLOCK + cerr << "speed_and_position: " << speed << " & " << pos << " <-> " << session->transport_frame() << " (transport)" << endl; + #endif + return true; } @@ -280,12 +371,3 @@ MIDIClock_Slave::resolution() const return (nframes_t) one_ppqn_in_frames * ppqn; } -void -MIDIClock_Slave::reset () -{ - - last_position = 0; - last_timestamp = 0; - - session.request_locate(0, false); -}