#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;
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
void
MIDIClock_Slave::calculate_one_ppqn_in_frames_at(nframes_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();
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;
}
void
-MIDIClock_Slave::update_midi_clock (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::update_midi_clock (Parser& /*parser*/, nframes_t timestamp)
{
// some pieces of hardware send MIDI Clock all the time
if ( (!_starting) && (!_started) ) {
return;
}
-
- // the number of midi clock messages (zero-based)
- static long midi_clock_count;
-
+
calculate_one_ppqn_in_frames_at(should_be_position);
nframes_t elapsed_since_start = timestamp - first_timestamp;
double error = 0;
- if (_starting || last_timestamp == 0) {
+ if (_starting || last_timestamp == 0) {
+ midi_clock_count = 0;
+
first_timestamp = timestamp;
elapsed_since_start = should_be_position;
calculate_filter_coefficients();
// initialize DLL
- e2 = double(one_ppqn_in_frames) / double(session.frame_rate());
- t0 = double(elapsed_since_start) / 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
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
- error = (double(should_be_position) - double(session.audible_frame()));
- e = error / double(session.frame_rate());
+ error = (double(should_be_position) - double(session->audible_frame()));
+ e = error / double(session->frame_rate());
// update DLL
t0 = t1;
//<< "@" << timestamp
<< " arrived at: " << elapsed_since_start << " (elapsed time) "
<< " should-be transport: " << should_be_position
- << " audible: " << session.audible_frame()
- << " real transport: " << session.transport_frame()
+ << " audible: " << session->audible_frame()
+ << " real transport: " << session->transport_frame()
<< " error: " << error
- //<< " engine: " << session.engine().frame_time()
+ //<< " 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()
+ << " 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.engine().frames_since_cycle_start() << 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)
+MIDIClock_Slave::start (Parser& /*parser*/, nframes_t /*timestamp*/)
{
#ifdef DEBUG_MIDI_CLOCK
- cerr << "MIDIClock_Slave got start message at time " << timestamp << " engine time: " << session.engine().frame_time() << endl;
+ cerr << "MIDIClock_Slave got start message at time " << timestamp << " engine time: " << session->frame_time() << endl;
#endif
if (!_started) {
_starting = false;
_started = false;
- session.request_locate(0, false);
+ session->request_locate(0, false);
}
void
-MIDIClock_Slave::contineu (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::contineu (Parser& /*parser*/, nframes_t /*timestamp*/)
{
#ifdef DEBUG_MIDI_CLOCK
std::cerr << "MIDIClock_Slave got continue message" << endl;
void
-MIDIClock_Slave::stop (Parser& parser, nframes_t timestamp)
+MIDIClock_Slave::stop (Parser& /*parser*/, nframes_t /*timestamp*/)
{
#ifdef DEBUG_MIDI_CLOCK
std::cerr << "MIDIClock_Slave got stop message" << endl;
_starting = false;
_started = false;
// locate to last MIDI clock position
- session.request_transport_speed(0.0);
- session.request_locate(should_be_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
+ nframes_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
cerr << "Song Position: " << position_in_sixteenth_notes << " frames: " << position_in_frames << endl;
#endif
- session.request_locate(position_in_frames, false);
+ session->request_locate(position_in_frames, false);
should_be_position = position_in_frames;
last_timestamp = 0;
/* no timecode for 1/4 second ? conclude that its stopped */
if (last_timestamp &&
now > last_timestamp &&
- now - last_timestamp > session.frame_rate() / 4) {
+ now - last_timestamp > session->frame_rate() / 4) {
#ifdef DEBUG_MIDI_CLOCK
cerr << "No MIDI Clock frames received for some time, stopping!" << endl;
#endif
pos = should_be_position;
- session.request_transport_speed (0);
- session.request_locate (should_be_position, false);
+ session->request_transport_speed (0);
+ session->request_locate (should_be_position, false);
return true;
} else {
return false;
return true;
}
- nframes_t engine_now = session.engine().frame_time();
+ nframes_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;
// calculate position
if (engine_now > last_timestamp) {
}
#ifdef DEBUG_MIDI_CLOCK
- cerr << "speed_and_position: " << speed << " & " << pos << " <-> " << session.transport_frame() << " (transport)" << endl;
+ cerr << "speed_and_position: " << speed << " & " << pos << " <-> " << session->transport_frame() << " (transport)" << endl;
#endif
return true;
projects / ardour.git / blobdiff