#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 <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 "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;
+#define DEBUG_MIDI_CLOCK 1
+
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 (1.0 / 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 (1.0 / 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
+#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)));
- connections.push_back (port->input()->position.connect (mem_fun (*this, &MIDIClock_Slave::position)));
+ 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();
one_ppqn_in_frames = frames_per_quarter_note / double (ppqn);
}
-ARDOUR::nframes_t
+ARDOUR::nframes64_t
MIDIClock_Slave::calculate_song_position(uint16_t song_position_in_sixteenth_notes)
{
- nframes_t song_position_frames = 0;
+ 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 * nframes_t(ppqn / 4);
+ song_position_frames += one_ppqn_in_frames * (nframes64_t)(ppqn / 4);
}
-
+
return song_position_frames;
}
-void
+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;
-
+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;
-
+
first_timestamp = timestamp;
- timestamp_relative_to_transport = last_position;
-
+ 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
+ // 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
- e = (double(last_position) - double(session.transport_frame()))
- / double(session.frame_rate());
-
+ 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
+ e2 += c * e;
+ }
+
+ #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
-
+
if (!_started) {
reset();
-
+
_started = true;
_starting = true;
}
MIDIClock_Slave::reset ()
{
- last_position = 0;
+ should_be_position = 0;
last_timestamp = 0;
-
+
_starting = false;
_started = false;
-
- session.request_locate(0, false);
+
+ if (session) 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
if (!_started) {
_starting = true;
- _started = 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
-
+
if (_started || _starting) {
_starting = false;
_started = false;
// locate to last MIDI clock position
- session.request_transport_speed(0.0);
- session.request_locate(last_position, false);
+ 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)
+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[0];
- byte msb = message[1];
+ 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);
- nframes_t position_in_frames = calculate_song_position(position_in_sixteenth_notes);
- session.request_locate(position_in_frames, false);
- last_position = position_in_frames;
+ 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;
-
+
}
bool
}
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_transport_speed (0);
- session.request_locate (last_position, false);
+ #endif
+ 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 (double& speed, nframes_t& pos)
+MIDIClock_Slave::speed_and_position (double& speed, nframes64_t& pos)
{
if (!_started || _starting) {
speed = 0.0;
- pos = last_position;
+ 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
- speed = ((t1 - t0) * session.frame_rate()) / one_ppqn_in_frames;
+ 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) {
// 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);
+ 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;
}
projects / ardour.git / blobdiff