#include "ardour/session.h"
#include "ardour/tempo.h"
#include "ardour/transport_master.h"
+#include "ardour/transport_master_manager.h"
#include "pbd/i18n.h"
MIDIClock_TransportMaster::MIDIClock_TransportMaster (std::string const & name, int ppqn)
: TransportMaster (MIDIClock, name)
, ppqn (ppqn)
- , last_timestamp (0)
- , should_be_position (0)
, midi_clock_count (0)
- , _speed (0)
, _running (false)
, _bpm (0)
{
MIDIClock_TransportMaster::init ()
{
midi_clock_count = 0;
- last_timestamp = 0;
+ current.reset ();
}
void
parser.start.connect_same_thread (port_connections, boost::bind (&MIDIClock_TransportMaster::start, this, _1, _2));
parser.contineu.connect_same_thread (port_connections, boost::bind (&MIDIClock_TransportMaster::contineu, this, _1, _2));
parser.stop.connect_same_thread (port_connections, boost::bind (&MIDIClock_TransportMaster::stop, this, _1, _2));
- parser.position.connect_same_thread (port_connections, boost::bind (&MIDIClock_TransportMaster::position, this, _1, _2, 3));
+ parser.position.connect_same_thread (port_connections, boost::bind (&MIDIClock_TransportMaster::position, this, _1, _2, _3, _4));
reset ();
}
}
-bool
-MIDIClock_TransportMaster::speed_and_position (double& speed, samplepos_t& pos, samplepos_t now)
-{
- if (!_running || !_collect) {
- return false;
- }
-
- if (fabs (_speed - 1.0) < 0.001) {
- speed = 1.0;
- } else {
- speed = _speed;
- }
-
- pos = should_be_position;
- pos += (now - last_timestamp) * _speed;
-
- return true;
-}
-
void
MIDIClock_TransportMaster::pre_process (MIDI::pframes_t nframes, samplepos_t now, boost::optional<samplepos_t> session_pos)
{
/* Read and parse incoming MIDI */
- DEBUG_TRACE (DEBUG::MidiClock, string_compose ("preprocess with lt = %1 @ %2, running ? %3\n", last_timestamp, now, _running));
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("preprocess with lt = %1 @ %2, running ? %3\n", current.timestamp, now, _running));
_midi_port->read_and_parse_entire_midi_buffer_with_no_speed_adjustment (nframes, parser, now);
/* no clock messages ever, or no clock messages for 1/4 second ? conclude that its stopped */
- if (!last_timestamp || (now > last_timestamp && ((now - last_timestamp) > (ENGINE->sample_rate() / 4)))) {
- _speed = 0.0;
+ if (!current.timestamp || (now > current.timestamp && ((now - current.timestamp) > (ENGINE->sample_rate() / 4)))) {
_bpm = 0.0;
- last_timestamp = 0;
_running = false;
_current_delta = 0;
midi_clock_count = 0;
return;
}
- if (!_running && midi_clock_count == 0 && session_pos) {
- should_be_position = *session_pos;
- DEBUG_TRACE (DEBUG::MidiClock, string_compose ("set sbp to %1\n", should_be_position));
- }
-
if (session_pos) {
- const samplepos_t current_pos = should_be_position + ((now - last_timestamp) * _speed);
+ const samplepos_t current_pos = current.position + ((now - current.timestamp) * current.speed);
_current_delta = current_pos - *session_pos;
} else {
_current_delta = 0;
}
- DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: speed %1 should-be %2 transport %3 \n", _speed, should_be_position, _session->transport_sample()));
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("speed_and_position: speed %1 should-be %2 transport %3 \n", current.speed, current.position, _session->transport_sample()));
}
void
samplepos_t elapsed_since_start = timestamp - first_timestamp;
double e = 0;
- calculate_one_ppqn_in_samples_at (should_be_position);
+ calculate_one_ppqn_in_samples_at (current.position);
- DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock count %1, sbp %2\n", midi_clock_count, should_be_position));
+ DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock count %1, sbp %2\n", midi_clock_count, current.position));
if (midi_clock_count == 0) {
/* second 0xf8 message after start/reset has arrived */
first_timestamp = timestamp;
- last_timestamp = timestamp;
+ current.update (0, timestamp, 0);
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("first clock message after start received @ %1\n", timestamp));
midi_clock_count++;
- should_be_position += one_ppqn_in_samples;
+ current.position += one_ppqn_in_samples;
} else if (midi_clock_count == 1) {
* (quarters per minute, and fully initialize the DLL
*/
- e = timestamp - last_timestamp;
+ e = timestamp - current.timestamp;
const samplecnt_t samples_per_quarter = e * 24;
_bpm = (ENGINE->sample_rate() * 60.0) / samples_per_quarter;
t1 = t0 + e2; /* timestamp we predict for the next 0xf8 clock message */
midi_clock_count++;
- should_be_position += one_ppqn_in_samples;
+ current.update (one_ppqn_in_samples, timestamp, 0);
} else {
t1 += b * e + e2;
e2 += c * e;
- const double samples_per_quarter = (timestamp - last_timestamp) * 24.0;
+ const double samples_per_quarter = (timestamp - current.timestamp) * 24.0;
const double instantaneous_bpm = (ENGINE->sample_rate() * 60.0) / samples_per_quarter;
- const double lpf_coeff = 0.05;
const double predicted_clock_interval_in_samples = (t1 - t0);
/* _speed is relative to session tempo map */
- _speed = predicted_clock_interval_in_samples / one_ppqn_in_samples;
+ double speed = predicted_clock_interval_in_samples / one_ppqn_in_samples;
/* _bpm (really, _qpm) is absolute */
* change of more than 20% of the current tempo.
*/
+ const double lpf_coeff = 0.063;
+
if (fabs (instantaneous_bpm - _bpm) > (0.20 * _bpm)) {
_bpm = instantaneous_bpm;
} else {
}
midi_clock_count++;
- should_be_position += one_ppqn_in_samples;
+ current.update (current.position + one_ppqn_in_samples, timestamp, speed);
+
+ if (TransportMasterManager::instance().current().get() == this) {
+ _session->maybe_update_tempo_from_midiclock_tempo (_bpm);
+ }
}
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("clock #%1 @ %2 should-be %3 transport %4 error %5 appspeed %6 "
"read-delta %7 should-be delta %8 t1-t0 %9 t0 %10 t1 %11 framerate %12 engine %13 running %14\n",
midi_clock_count, // #
elapsed_since_start, // @
- should_be_position, // should-be
+ current.position, // should-be
_session->transport_sample(), // transport
e, // error
(t1 - t0) / one_ppqn_in_samples, // appspeed
- timestamp - last_timestamp, // read delta
+ timestamp - current.timestamp, // read delta
one_ppqn_in_samples, // should-be delta
(t1 - t0), // t1-t0
t0, // t0
_running
));
-
- last_timestamp = timestamp;
}
void
if (!_running) {
reset();
_running = true;
- should_be_position = _session->transport_sample();
+ current.update (_session->transport_sample(), timestamp, 0);
}
}
{
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("MidiClock Master reset(): calculated filter for period size %2\n", ENGINE->samples_per_cycle()));
- should_be_position = _session->transport_sample();
- _speed = 0;
- last_timestamp = 0;
+ current.update (_session->transport_sample(), 0, 0);
_running = false;
_current_delta = 0;
}
void
-MIDIClock_TransportMaster::stop (Parser& /*parser*/, samplepos_t /*timestamp*/)
+MIDIClock_TransportMaster::stop (Parser& /*parser*/, samplepos_t timestamp)
{
DEBUG_TRACE (DEBUG::MidiClock, "MIDIClock_TransportMaster got stop message\n");
if (_running) {
_running = false;
- _speed = 0;
- last_timestamp = 0;
// we need to go back to the last MIDI beat (6 ppqn)
// and lets hope the tempo didnt change in the meantime :)
//
// find out the last MIDI beat: go back #midi_clocks mod 6
// and lets hope the tempo didnt change in those last 6 beats :)
- should_be_position -= (midi_clock_count % 6) * one_ppqn_in_samples;
+ current.update (current.position - (midi_clock_count % 6) * one_ppqn_in_samples, 0, 0);
}
}
void
-MIDIClock_TransportMaster::position (Parser& /*parser*/, MIDI::byte* message, size_t size)
+MIDIClock_TransportMaster::position (Parser& /*parser*/, MIDI::byte* message, size_t size, samplepos_t timestamp)
{
// we are not supposed to get position messages while we are running
// so lets be robust and ignore those
DEBUG_TRACE (DEBUG::MidiClock, string_compose ("Song Position: %1 samples: %2\n", position_in_sixteenth_notes, position_in_samples));
- should_be_position = position_in_samples;
- last_timestamp = 0;
-
+ current.update (position_in_samples, timestamp, current.speed);
}
bool
return false;
}
+ARDOUR::samplecnt_t
+MIDIClock_TransportMaster::update_interval() const
+{
+ if (one_ppqn_in_samples) {
+ return resolution ();
+ }
+
+ return AudioEngine::instance()->sample_rate() / 120 / 4; /* pure guesswork */
+}
+
ARDOUR::samplecnt_t
MIDIClock_TransportMaster::resolution() const
{
MIDIClock_TransportMaster::delta_string() const
{
char delta[80];
- if (last_timestamp == 0 || starting()) {
+ SafeTime last;
+ current.safe_read (last);
+
+ 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",
projects / ardour.git / blobdiff