*/
+#include <cmath>
#include <errno.h>
#include <poll.h>
#include <sys/types.h>
#include <unistd.h>
-#include <pbd/error.h>
-#include <pbd/failed_constructor.h>
-#include <pbd/pthread_utils.h>
+#include "pbd/error.h"
+#include "pbd/failed_constructor.h"
+#include "pbd/pthread_utils.h"
+#include "pbd/convert.h"
-#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 "midi++/port.h"
+#include "ardour/debug.h"
+#include "ardour/slave.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)
- , bandwidth (30.0 / 60.0) // 1 BpM = 1 / 60 Hz
+ : ppqn (ppqn)
+ , bandwidth (10.0 / 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 (10.0 / 60.0) // 1 BpM = 1 / 60 Hz
+{
+ reset ();
+}
+
MIDIClock_Slave::~MIDIClock_Slave()
{
+ delete session;
}
void
MIDIClock_Slave::rebind (MIDI::Port& p)
{
- for (vector<sigc::connection>::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
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MIDIClock_Slave: connecting to port %1\n", port->name()));
- 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->parser()->timing.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::update_midi_clock, this, _1, _2));
+ port->parser()->start.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::start, this, _1, _2));
+ port->parser()->contineu.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::contineu, this, _1, _2));
+ port->parser()->stop.connect_same_thread (port_connections, boost::bind (&MIDIClock_Slave::stop, this, _1, _2));
+ port->parser()->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(framepos_t 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_meter);
+ const Tempo& current_tempo = session->tempo_map().tempo_at(time);
+ double frames_per_beat = current_tempo.frames_per_beat(session->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;
one_ppqn_in_frames = frames_per_quarter_note / double (ppqn);
+ // DEBUG_TRACE (DEBUG::MidiClock, string_compose ("at %1, one ppqn = %2\n", time, one_ppqn_in_frames));
}
-void
+ARDOUR::framepos_t
+MIDIClock_Slave::calculate_song_position(uint16_t song_position_in_sixteenth_notes)
+{
+ framepos_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 * (framepos_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 * M_PI * 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*/, framepos_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);
+
+ framepos_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->transport_frame()));
+ e = error / double(session->frame_rate());
+ current_delta = error;
+
// update DLL
t0 = t1;
t1 += b * e + e2;
e2 += c * e;
-
- }
-
- #ifdef DEBUG_MIDI_CLOCK
- std::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;
- #endif // DEBUG_MIDI_CLOCK
+ }
+
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock #%1 @ %2 arrived %3 (theoretical) audible %4 transport %5 error %6 "
+ "read delta %7 should-be delta %8 t1-t0 %9 t0 %10 t1 %11 framerate %12 appspeed %13\n",
+ midi_clock_count,
+ elapsed_since_start,
+ should_be_position,
+ session->audible_frame(),
+ session->transport_frame(),
+ error,
+ timestamp - last_timestamp,
+ one_ppqn_in_frames,
+ (t1 -t0) * session->frame_rate(),
+ t0 * session->frame_rate(),
+ t1 * session->frame_rate(),
+ session->frame_rate(),
+ ((t1 - t0) * session->frame_rate()) / one_ppqn_in_frames));
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;
- #endif
-
- last_position = 0;
+MIDIClock_Slave::start (Parser& /*parser*/, framepos_t timestamp)
+{
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MIDIClock_Slave got start message at time %1 engine time %2\n", timestamp, session->frame_time()));
+
+ if (!_started) {
+ reset();
+
+ _started = true;
+ _starting = true;
+
+ should_be_position = session->transport_frame();
+ }
+}
+
+void
+MIDIClock_Slave::reset ()
+{
+ should_be_position = session->transport_frame();
last_timestamp = 0;
-
- _started = true;
+
_starting = true;
+ _started = true;
+
+ // session->request_locate(0, false);
+ current_delta = 0;
}
void
-MIDIClock_Slave::contineu (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::contineu (Parser& /*parser*/, framepos_t /*timestamp*/)
{
- #ifdef DEBUG_MIDI_CLOCK
- std::cerr << "MIDIClock_Slave got continue message" << endl;
- #endif
- start(parser, timestamp);
+ DEBUG_TRACE (DEBUG::MidiClock, "MIDIClock_Slave got continue message\n");
+
+ if (!_started) {
+ _starting = true;
+ _started = true;
+ }
}
void
-MIDIClock_Slave::stop (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::stop (Parser& /*parser*/, framepos_t /*timestamp*/)
{
- #ifdef DEBUG_MIDI_CLOCK
- std::cerr << "MIDIClock_Slave got stop message" << endl;
- #endif
-
- last_position = 0;
+ DEBUG_TRACE (DEBUG::MidiClock, "MIDIClock_Slave got stop message\n");
+
+ 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
+ framepos_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);
+ framepos_t position_in_frames = calculate_song_position(position_in_sixteenth_notes);
+
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Song Position: %1 frames: %2\n", position_in_sixteenth_notes, position_in_frames));
+
+ session->request_locate(position_in_frames, false);
+ should_be_position = position_in_frames;
last_timestamp = 0;
-
- _started = false;
- reset();
+
}
bool
}
bool
-MIDIClock_Slave::stop_if_no_more_clock_events(nframes_t& pos, nframes_t now)
+MIDIClock_Slave::stop_if_no_more_clock_events(framepos_t& pos, framepos_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
- 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();
+ if (last_timestamp &&
+ now > last_timestamp &&
+ now - last_timestamp > session->frame_rate() / 4) {
+ DEBUG_TRACE (DEBUG::MidiClock, "No MIDI Clock frames received for some time, stopping!\n");
+ pos = should_be_position;
+ session->request_transport_speed (0);
+ session->request_locate (should_be_position, false);
return true;
} else {
return false;
}
bool
-MIDIClock_Slave::speed_and_position (float& speed, nframes_t& pos)
+MIDIClock_Slave::speed_and_position (double& speed, framepos_t& pos)
{
if (!_started || _starting) {
speed = 0.0;
- pos = 0;
+ pos = should_be_position;
return true;
}
-
- nframes_t engine_now = session.engine().frame_time();
+
+ framepos_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;
+
+ // provide a 0.1% deadzone to lock the speed
+ if (fabs(speed - 1.0) <= 0.001)
+ speed = 1.0;
+
// 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);
+ framecnt_t elapsed = engine_now - last_timestamp;
+ pos = (framepos_t) (should_be_position + double(elapsed) * speed);
} else {
// A new MIDI clock message has arrived this cycle
- pos = last_position;
+ pos = should_be_position;
}
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: %1 & %2 <-> %3 (transport)\n", speed, pos, session->transport_frame()));
+
return true;
}
-ARDOUR::nframes_t
+ARDOUR::framecnt_t
MIDIClock_Slave::resolution() const
{
// one beat
- return (nframes_t) one_ppqn_in_frames * ppqn;
+ return (framecnt_t) one_ppqn_in_frames * ppqn;
}
-void
-MIDIClock_Slave::reset ()
+std::string
+MIDIClock_Slave::approximate_current_delta() const
{
-
- last_position = 0;
- last_timestamp = 0;
-
- session.request_locate(0, false);
+ char delta[80];
+ if (last_timestamp == 0 || _starting) {
+ snprintf(delta, sizeof(delta), "\u2012\u2012\u2012\u2012");
+ } else {
+ snprintf(delta, sizeof(delta), "\u0394<span foreground=\"green\" face=\"monospace\" >%s%s%" PRIi64 "</span>sm",
+ LEADINGZERO(abs(current_delta)), PLUSMINUS(-current_delta), abs(current_delta));
+ }
+ return std::string(delta);
}
+
projects / ardour.git / blobdiff