*/
+#include <cmath>
#include <errno.h>
#include <poll.h>
#include <sys/types.h>
#include "midi++/port.h"
#include "midi++/jack.h"
+
+#include "ardour/debug.h"
#include "ardour/slave.h"
#include "ardour/session.h"
#include "ardour/audioengine.h"
using namespace MIDI;
using namespace PBD;
+#define DEBUG_MIDI_CLOCK 1
+
MIDIClock_Slave::MIDIClock_Slave (Session& s, MIDI::Port& p, int ppqn)
- : port_connections (0)
- , ppqn (ppqn)
- , bandwidth (30.0 / 60.0) // 1 BpM = 1 / 60 Hz
+ : ppqn (ppqn)
+ , bandwidth (1.0 / 60.0) // 1 BpM = 1 / 60 Hz
{
session = (ISlaveSessionProxy *) new SlaveSessionProxy(s);
rebind (p);
MIDIClock_Slave::MIDIClock_Slave (ISlaveSessionProxy* session_proxy, int ppqn)
: session(session_proxy)
- , port_connections (0)
, ppqn (ppqn)
- , bandwidth (30.0 / 60.0) // 1 BpM = 1 / 60 Hz
+ , bandwidth (1.0 / 60.0) // 1 BpM = 1 / 60 Hz
{
- session = session_proxy;
reset ();
}
MIDIClock_Slave::~MIDIClock_Slave()
{
delete session;
- delete port_connections;
}
void
MIDIClock_Slave::rebind (MIDI::Port& p)
{
- delete port_connections;
- port_connections = new ScopedConnectionList;
-
+ 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()));
- port_connections->add_connection (port->input()->timing.connect (boost::bind (&MIDIClock_Slave::update_midi_clock, this, _1, _2)));
- port_connections->add_connection (port->input()->start.connect (boost::bind (&MIDIClock_Slave::start, this, _1, _2)));
- port_connections->add_connection (port->input()->contineu.connect (boost::bind (&MIDIClock_Slave::contineu, this, _1, _2)));
- port_connections->add_connection (port->input()->stop.connect (boost::bind (&MIDIClock_Slave::stop, this, _1, _2)));
- port_connections->add_connection (port->input()->position.connect (boost::bind (&MIDIClock_Slave::position, this, _1, _2, 3)));
+ 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
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));
}
ARDOUR::nframes64_t
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;
}
calculate_filter_coefficients();
// calculate loop error
- // we use session->transport_frame() instead of t1 here
+ // we use session->audible_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()));
e2 += c * e;
}
- #ifdef DEBUG_MIDI_CLOCK
- cerr
- << "MIDI Clock #" << midi_clock_count
- //<< "@" << 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
-
+ 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*/, nframes64_t /*timestamp*/)
+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
+ 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 = 0;
+ should_be_position = session->transport_frame();
last_timestamp = 0;
- _starting = false;
- _started = false;
-
- session->request_locate(0, false);
+ _starting = true;
+ _started = true;
+
+ // session->request_locate(0, false);
}
void
MIDIClock_Slave::contineu (Parser& /*parser*/, nframes64_t /*timestamp*/)
{
- #ifdef DEBUG_MIDI_CLOCK
- std::cerr << "MIDIClock_Slave got continue message" << endl;
- #endif
+ DEBUG_TRACE (DEBUG::MidiClock, "MIDIClock_Slave got continue message\n");
+
if (!_started) {
_starting = true;
_started = true;
void
MIDIClock_Slave::stop (Parser& /*parser*/, nframes64_t /*timestamp*/)
{
- #ifdef DEBUG_MIDI_CLOCK
- std::cerr << "MIDIClock_Slave got stop message" << endl;
- #endif
+ DEBUG_TRACE (DEBUG::MidiClock, "MIDIClock_Slave got stop message\n");
if (_started || _starting) {
_starting = false;
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
+ 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;
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
+ 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);
// calculate speed
speed = ((t1 - t0) * session->frame_rate()) / one_ppqn_in_frames;
+
+ // provide a 3% deadzone to lock the speed
+ if (fabs(speed - 1.0) <= 0.03)
+ speed = 1.0;
// calculate position
if (engine_now > last_timestamp) {
pos = should_be_position;
}
- #ifdef DEBUG_MIDI_CLOCK
- cerr << "speed_and_position: " << speed << " & " << pos << " <-> " << session->transport_frame() << " (transport)" << endl;
- #endif
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: %1 & %2 <-> %3 (transport)\n", speed, pos, session->transport_frame()));
return true;
}