2 Copyright (C) 2000-2002 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <glibmm/threads.h>
28 #include "pbd/enumwriter.h"
29 #include "pbd/xml++.h"
30 #include "evoral/Beats.hpp"
32 #include "ardour/debug.h"
33 #include "ardour/lmath.h"
34 #include "ardour/tempo.h"
40 using namespace ARDOUR;
43 using Timecode::BBT_Time;
45 /* _default tempo is 4/4 qtr=120 */
47 Meter TempoMap::_default_meter (4.0, 4.0);
48 Tempo TempoMap::_default_tempo (120.0);
50 /***********************************************************************/
53 Meter::frames_per_grid (const Tempo& tempo, framecnt_t sr) const
55 /* This is tempo- and meter-sensitive. The number it returns
56 is based on the interval between any two lines in the
57 grid that is constructed from tempo and meter sections.
59 The return value IS NOT interpretable in terms of "beats".
62 return (60.0 * sr) / (tempo.beats_per_minute() * (_note_type/tempo.note_type()));
66 Meter::frames_per_bar (const Tempo& tempo, framecnt_t sr) const
68 return frames_per_grid (tempo, sr) * _divisions_per_bar;
71 /***********************************************************************/
73 const string TempoSection::xml_state_node_name = "Tempo";
75 TempoSection::TempoSection (const XMLNode& node)
77 , Tempo (TempoMap::default_tempo())
80 , _locked_to_meter (false)
82 const XMLProperty *prop;
88 _legacy_bbt = BBT_Time (0, 0, 0);
90 if ((prop = node.property ("start")) != 0) {
91 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
95 /* legacy session - start used to be in bbt*/
98 info << _("Legacy session detected. TempoSection XML node will be altered.") << endmsg;
102 if ((prop = node.property ("pulse")) != 0) {
103 if (sscanf (prop->value().c_str(), "%lf", &pulse) != 1) {
104 error << _("TempoSection XML node has an illegal \"pulse\" value") << endmsg;
110 if ((prop = node.property ("frame")) != 0) {
111 if (sscanf (prop->value().c_str(), "%" PRIu32, &frame) != 1) {
112 error << _("TempoSection XML node has an illegal \"frame\" value") << endmsg;
118 if ((prop = node.property ("beats-per-minute")) == 0) {
119 error << _("TempoSection XML node has no \"beats-per-minute\" property") << endmsg;
120 throw failed_constructor();
123 if (sscanf (prop->value().c_str(), "%lf", &_beats_per_minute) != 1 || _beats_per_minute < 0.0) {
124 error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg;
125 throw failed_constructor();
128 if ((prop = node.property ("note-type")) == 0) {
129 /* older session, make note type be quarter by default */
132 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 1.0) {
133 error << _("TempoSection XML node has an illegal \"note-type\" value") << endmsg;
134 throw failed_constructor();
138 if ((prop = node.property ("movable")) == 0) {
139 error << _("TempoSection XML node has no \"movable\" property") << endmsg;
140 throw failed_constructor();
143 set_movable (string_is_affirmative (prop->value()));
145 if ((prop = node.property ("active")) == 0) {
146 warning << _("TempoSection XML node has no \"active\" property") << endmsg;
149 set_active (string_is_affirmative (prop->value()));
152 if ((prop = node.property ("tempo-type")) == 0) {
155 _type = Type (string_2_enum (prop->value(), _type));
158 if ((prop = node.property ("lock-style")) == 0) {
160 set_position_lock_style (MusicTime);
162 set_position_lock_style (AudioTime);
165 set_position_lock_style (PositionLockStyle (string_2_enum (prop->value(), position_lock_style())));
168 if ((prop = node.property ("locked-to-meter")) == 0) {
169 set_locked_to_meter (false);
171 set_locked_to_meter (string_is_affirmative (prop->value()));
176 TempoSection::get_state() const
178 XMLNode *root = new XMLNode (xml_state_node_name);
182 snprintf (buf, sizeof (buf), "%f", pulse());
183 root->add_property ("pulse", buf);
184 snprintf (buf, sizeof (buf), "%li", frame());
185 root->add_property ("frame", buf);
186 snprintf (buf, sizeof (buf), "%f", _beats_per_minute);
187 root->add_property ("beats-per-minute", buf);
188 snprintf (buf, sizeof (buf), "%f", _note_type);
189 root->add_property ("note-type", buf);
190 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
191 root->add_property ("movable", buf);
192 snprintf (buf, sizeof (buf), "%s", active()?"yes":"no");
193 root->add_property ("active", buf);
194 root->add_property ("tempo-type", enum_2_string (_type));
195 root->add_property ("lock-style", enum_2_string (position_lock_style()));
196 root->add_property ("locked-to-meter", locked_to_meter()?"yes":"no");
202 TempoSection::set_type (Type type)
207 /** returns the tempo in whole pulses per minute at the zero-based (relative to session) frame.
210 TempoSection::tempo_at_frame (const framepos_t& f, const framecnt_t& frame_rate) const
213 if (_type == Constant || _c_func == 0.0) {
214 return pulses_per_minute();
217 return pulse_tempo_at_time (frame_to_minute (f - frame(), frame_rate));
220 /** returns the zero-based frame (relative to session)
221 where the tempo in whole pulses per minute occurs in this section.
222 beat b is only used for constant tempos.
223 note that the tempo map may have multiple such values.
226 TempoSection::frame_at_tempo (const double& ppm, const double& b, const framecnt_t& frame_rate) const
228 if (_type == Constant || _c_func == 0.0) {
229 return ((b - pulse()) * frames_per_pulse (frame_rate)) + frame();
232 return minute_to_frame (time_at_pulse_tempo (ppm), frame_rate) + frame();
234 /** returns the tempo in pulses per minute at the zero-based (relative to session) beat.
237 TempoSection::tempo_at_pulse (const double& p) const
240 if (_type == Constant || _c_func == 0.0) {
241 return pulses_per_minute();
243 double const ppm = pulse_tempo_at_pulse (p - pulse());
247 /** returns the zero-based beat (relative to session)
248 where the tempo in whole pulses per minute occurs given frame f. frame f is only used for constant tempos.
249 note that the session tempo map may have multiple beats at a given tempo.
252 TempoSection::pulse_at_tempo (const double& ppm, const framepos_t& f, const framecnt_t& frame_rate) const
254 if (_type == Constant || _c_func == 0.0) {
255 double const pulses = ((f - frame()) / frames_per_pulse (frame_rate)) + pulse();
258 return pulse_at_pulse_tempo (ppm) + pulse();
261 /** returns the zero-based pulse (relative to session origin)
262 where the zero-based frame (relative to session)
266 TempoSection::pulse_at_frame (const framepos_t& f, const framecnt_t& frame_rate) const
268 if (_type == Constant || _c_func == 0.0) {
269 return ((f - frame()) / frames_per_pulse (frame_rate)) + pulse();
272 return pulse_at_time (frame_to_minute (f - frame(), frame_rate)) + pulse();
275 /** returns the zero-based frame (relative to session start frame)
276 where the zero-based pulse (relative to session start)
281 TempoSection::frame_at_pulse (const double& p, const framecnt_t& frame_rate) const
283 if (_type == Constant || _c_func == 0.0) {
284 return (framepos_t) floor ((p - pulse()) * frames_per_pulse (frame_rate)) + frame();
287 return minute_to_frame (time_at_pulse (p - pulse()), frame_rate) + frame();
295 Tt----|-----------------*|
296 Ta----|--------------|* |
302 _______________|___|____
303 time a t (next tempo)
306 Duration in beats at time a is the integral of some Tempo function.
307 In our case, the Tempo function (Tempo at time t) is
310 with function constant
315 The integral over t of our Tempo function (the beat function, which is the duration in beats at some time t) is:
316 b(t) = T0(e^(ct) - 1) / c
318 To find the time t at beat duration b, we use the inverse function of the beat function (the time function) which can be shown to be:
319 t(b) = log((c.b / T0) + 1) / c
321 The time t at which Tempo T occurs is a as above:
322 t(T) = log(T / T0) / c
324 The beat at which a Tempo T occurs is:
327 The Tempo at which beat b occurs is:
330 We define c for this tempo ramp by placing a new tempo section at some time t after this one.
331 Our problem is that we usually don't know t.
332 We almost always know the duration in beats between this and the new section, so we need to find c in terms of the beat function.
333 Where a = t (i.e. when a is equal to the time of the next tempo section), the beat function reveals:
334 t = b log (Ta / T0) / (T0 (e^(log (Ta / T0)) - 1))
336 By substituting our expanded t as a in the c function above, our problem is reduced to:
337 c = T0 (e^(log (Ta / T0)) - 1) / b
339 Of course the word 'beat' has been left loosely defined above.
340 In music, a beat is defined by the musical pulse (which comes from the tempo)
341 and the meter in use at a particular time (how many pulse divisions there are in one bar).
342 It would be more accurate to substitute the work 'pulse' for 'beat' above.
346 We can now store c for future time calculations.
347 If the following tempo section (the one that defines c in conjunction with this one)
348 is changed or moved, c is no longer valid.
350 The public methods are session-relative.
352 Most of this stuff is taken from this paper:
355 TOOLS FOR DYNAMIC TEMPO CALCULATIONS
358 Zurich University of Arts
359 Institute for Computer Music and Sound Technology
361 https://www.zhdk.ch/fileadmin/data_subsites/data_icst/Downloads/Timegrid/ICST_Tempopolyphony_ICMC07.pdf
366 compute this ramp's function constant using the end tempo (in whole pulses per minute)
367 and duration (pulses into global start) of some later tempo section.
370 TempoSection::compute_c_func_pulse (const double& end_bpm, const double& end_pulse, const framecnt_t& frame_rate)
372 double const log_tempo_ratio = log (end_bpm / pulses_per_minute());
373 return pulses_per_minute() * (expm1 (log_tempo_ratio)) / (end_pulse - pulse());
376 /* compute the function constant from some later tempo section, given tempo (whole pulses/min.) and distance (in frames) from session origin */
378 TempoSection::compute_c_func_frame (const double& end_bpm, const framepos_t& end_frame, const framecnt_t& frame_rate) const
380 return c_func (end_bpm, frame_to_minute (end_frame - frame(), frame_rate));
384 TempoSection::minute_to_frame (const double& time, const framecnt_t& frame_rate) const
386 return (framepos_t) floor ((time * 60.0 * frame_rate) + 0.5);
390 TempoSection::frame_to_minute (const framepos_t& frame, const framecnt_t& frame_rate) const
392 return (frame / (double) frame_rate) / 60.0;
395 /* position function */
397 TempoSection::a_func (double end_ppm, double c_func) const
399 return log (end_ppm / pulses_per_minute()) / c_func;
402 /*function constant*/
404 TempoSection::c_func (double end_ppm, double end_time) const
406 return log (end_ppm / pulses_per_minute()) / end_time;
409 /* tempo in ppm at time in minutes */
411 TempoSection::pulse_tempo_at_time (const double& time) const
413 return exp (_c_func * time) * pulses_per_minute();
416 /* time in minutes at tempo in ppm */
418 TempoSection::time_at_pulse_tempo (const double& pulse_tempo) const
420 return log (pulse_tempo / pulses_per_minute()) / _c_func;
423 /* tick at tempo in ppm */
425 TempoSection::pulse_at_pulse_tempo (const double& pulse_tempo) const
427 return (pulse_tempo - pulses_per_minute()) / _c_func;
430 /* tempo in ppm at tick */
432 TempoSection::pulse_tempo_at_pulse (const double& pulse) const
434 return (pulse * _c_func) + pulses_per_minute();
437 /* pulse at time in minutes */
439 TempoSection::pulse_at_time (const double& time) const
441 return expm1 (_c_func * time) * (pulses_per_minute() / _c_func);
444 /* time in minutes at pulse */
446 TempoSection::time_at_pulse (const double& pulse) const
448 return log1p ((_c_func * pulse) / pulses_per_minute()) / _c_func;
451 /***********************************************************************/
453 const string MeterSection::xml_state_node_name = "Meter";
455 MeterSection::MeterSection (const XMLNode& node)
456 : MetricSection (0.0), Meter (TempoMap::default_meter())
458 XMLProperty const * prop;
461 const XMLProperty *prop;
465 framepos_t frame = 0;
466 pair<double, BBT_Time> start;
468 if ((prop = node.property ("start")) != 0) {
469 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
473 error << _("MeterSection XML node has an illegal \"start\" value") << endmsg;
475 /* legacy session - start used to be in bbt*/
476 info << _("Legacy session detected - MeterSection XML node will be altered.") << endmsg;
481 if ((prop = node.property ("pulse")) != 0) {
482 if (sscanf (prop->value().c_str(), "%lf", &pulse) != 1) {
483 error << _("MeterSection XML node has an illegal \"pulse\" value") << endmsg;
488 if ((prop = node.property ("beat")) != 0) {
489 if (sscanf (prop->value().c_str(), "%lf", &beat) != 1) {
490 error << _("MeterSection XML node has an illegal \"beat\" value") << endmsg;
496 if ((prop = node.property ("bbt")) == 0) {
497 warning << _("MeterSection XML node has no \"bbt\" property") << endmsg;
498 } else if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
502 error << _("MeterSection XML node has an illegal \"bbt\" value") << endmsg;
503 throw failed_constructor();
509 if ((prop = node.property ("frame")) != 0) {
510 if (sscanf (prop->value().c_str(), "%li", &frame) != 1) {
511 error << _("MeterSection XML node has an illegal \"frame\" value") << endmsg;
517 /* beats-per-bar is old; divisions-per-bar is new */
519 if ((prop = node.property ("divisions-per-bar")) == 0) {
520 if ((prop = node.property ("beats-per-bar")) == 0) {
521 error << _("MeterSection XML node has no \"beats-per-bar\" or \"divisions-per-bar\" property") << endmsg;
522 throw failed_constructor();
525 if (sscanf (prop->value().c_str(), "%lf", &_divisions_per_bar) != 1 || _divisions_per_bar < 0.0) {
526 error << _("MeterSection XML node has an illegal \"divisions-per-bar\" value") << endmsg;
527 throw failed_constructor();
530 if ((prop = node.property ("note-type")) == 0) {
531 error << _("MeterSection XML node has no \"note-type\" property") << endmsg;
532 throw failed_constructor();
534 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) {
535 error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg;
536 throw failed_constructor();
539 if ((prop = node.property ("movable")) == 0) {
540 error << _("MeterSection XML node has no \"movable\" property") << endmsg;
541 throw failed_constructor();
544 set_movable (string_is_affirmative (prop->value()));
546 if ((prop = node.property ("lock-style")) == 0) {
547 warning << _("MeterSection XML node has no \"lock-style\" property") << endmsg;
549 set_position_lock_style (MusicTime);
551 set_position_lock_style (AudioTime);
554 set_position_lock_style (PositionLockStyle (string_2_enum (prop->value(), position_lock_style())));
559 MeterSection::get_state() const
561 XMLNode *root = new XMLNode (xml_state_node_name);
565 snprintf (buf, sizeof (buf), "%lf", pulse());
566 root->add_property ("pulse", buf);
567 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
571 root->add_property ("bbt", buf);
572 snprintf (buf, sizeof (buf), "%lf", beat());
573 root->add_property ("beat", buf);
574 snprintf (buf, sizeof (buf), "%f", _note_type);
575 root->add_property ("note-type", buf);
576 snprintf (buf, sizeof (buf), "%li", frame());
577 root->add_property ("frame", buf);
578 root->add_property ("lock-style", enum_2_string (position_lock_style()));
579 snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
580 root->add_property ("divisions-per-bar", buf);
581 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
582 root->add_property ("movable", buf);
587 /***********************************************************************/
591 Tempo can be thought of as a source of the musical pulse.
592 Meters divide that pulse into measures and beats.
593 Tempo pulses can be divided to be in sympathy with the meter, but this does not affect the beat
594 at any particular time.
595 Note that Tempo::beats_per_minute() has nothing to do with musical beats.
596 It should rather be thought of as tempo note divisions per minute.
598 TempoSections, which are nice to think of in whole pulses per minute,
599 and MeterSecions which divide tempo pulses into measures (via divisions_per_bar)
600 and beats (via note_divisor) are used to form a tempo map.
601 TempoSections and MeterSections may be locked to either audio or music (position lock style).
602 We construct the tempo map by first using the frame or pulse position (depending on position lock style) of each tempo.
603 We then use this pulse/frame layout to find the beat & pulse or frame position of each meter (again depending on lock style).
605 Having done this, we can now find any one of tempo, beat, frame or pulse if a beat, frame, pulse or tempo is known.
607 The first tempo and first meter are special. they must move together, and must be locked to audio.
608 Audio locked tempos which lie before the first meter are made inactive.
609 They will be re-activated if the first meter is again placed before them.
611 Both tempos and meters have a pulse position and a frame position.
612 Meters also have a beat position, which is always 0.0 for the first meter.
614 A tempo locked to music is locked to musical pulses.
615 A meter locked to music is locked to beats.
617 Recomputing the tempo map is the process where the 'missing' position
618 (tempo pulse or meter pulse & beat in the case of AudioTime, frame for MusicTime) is calculated.
620 It is important to keep the _metrics in an order that makes sense.
621 Because ramped MusicTime and AudioTime tempos can interact with each other,
622 reordering is frequent. Care must be taken to keep _metrics in a solved state.
623 Solved means ordered by frame or pulse with frame-accurate precision (see check_solved()).
625 struct MetricSectionSorter {
626 bool operator() (const MetricSection* a, const MetricSection* b) {
627 return a->pulse() < b->pulse();
631 struct MetricSectionFrameSorter {
632 bool operator() (const MetricSection* a, const MetricSection* b) {
633 return a->frame() < b->frame();
637 TempoMap::TempoMap (framecnt_t fr)
640 BBT_Time start (1, 1, 0);
642 TempoSection *t = new TempoSection ((framepos_t) 0, _default_tempo.beats_per_minute(), _default_tempo.note_type(), TempoSection::Constant);
643 MeterSection *m = new MeterSection ((framepos_t) 0, 0.0, start, _default_meter.divisions_per_bar(), _default_meter.note_divisor());
645 t->set_movable (false);
646 m->set_movable (false);
648 /* note: frame time is correct (zero) for both of these */
650 _metrics.push_back (t);
651 _metrics.push_back (m);
655 TempoMap::~TempoMap ()
657 Metrics::const_iterator d = _metrics.begin();
658 while (d != _metrics.end()) {
666 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
668 bool removed = false;
671 Glib::Threads::RWLock::WriterLock lm (lock);
672 if ((removed = remove_tempo_locked (tempo))) {
673 if (complete_operation) {
674 recompute_map (_metrics);
679 if (removed && complete_operation) {
680 PropertyChanged (PropertyChange ());
685 TempoMap::remove_tempo_locked (const TempoSection& tempo)
689 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
690 if (dynamic_cast<TempoSection*> (*i) != 0) {
691 if (tempo.frame() == (*i)->frame()) {
692 if ((*i)->movable()) {
705 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
707 bool removed = false;
710 Glib::Threads::RWLock::WriterLock lm (lock);
711 if ((removed = remove_meter_locked (tempo))) {
712 if (complete_operation) {
713 recompute_map (_metrics);
718 if (removed && complete_operation) {
719 PropertyChanged (PropertyChange ());
724 TempoMap::remove_meter_locked (const MeterSection& meter)
728 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
730 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
731 if (meter.frame() == (*i)->frame()) {
732 if (t->locked_to_meter()) {
741 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
742 if (dynamic_cast<MeterSection*> (*i) != 0) {
743 if (meter.frame() == (*i)->frame()) {
744 if ((*i)->movable()) {
757 TempoMap::do_insert (MetricSection* section)
759 bool need_add = true;
760 /* we only allow new meters to be inserted on beat 1 of an existing
764 if ((m = dynamic_cast<MeterSection*>(section)) != 0) {
766 if ((m->bbt().beats != 1) || (m->bbt().ticks != 0)) {
768 pair<double, BBT_Time> corrected = make_pair (m->pulse(), m->bbt());
769 corrected.second.beats = 1;
770 corrected.second.ticks = 0;
771 corrected.first = bbt_to_beats_locked (_metrics, corrected.second);
772 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
773 m->bbt(), corrected.second) << endmsg;
774 //m->set_pulse (corrected);
778 /* Look for any existing MetricSection that is of the same type and
779 in the same bar as the new one, and remove it before adding
780 the new one. Note that this means that if we find a matching,
781 existing section, we can break out of the loop since we're
782 guaranteed that there is only one such match.
785 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
787 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
788 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
789 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
790 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
792 if (tempo && insert_tempo) {
795 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
796 if ((ipm && tempo->pulse() == insert_tempo->pulse()) || (!ipm && tempo->frame() == insert_tempo->frame())) {
798 if (!tempo->movable()) {
800 /* can't (re)move this section, so overwrite
801 * its data content (but not its properties as
805 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(insert_tempo));
806 (*i)->set_position_lock_style (AudioTime);
808 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
809 t->set_type (insert_tempo->type());
819 } else if (meter && insert_meter) {
823 bool const ipm = insert_meter->position_lock_style() == MusicTime;
825 if ((ipm && meter->beat() == insert_meter->beat()) || (!ipm && meter->frame() == insert_meter->frame())) {
827 if (!meter->movable()) {
829 /* can't (re)move this section, so overwrite
830 * its data content (but not its properties as
834 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(insert_meter));
835 (*i)->set_position_lock_style (AudioTime);
845 /* non-matching types, so we don't care */
849 /* Add the given MetricSection, if we didn't just reset an existing
854 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
855 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
858 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
859 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
862 bool const ipm = insert_meter->position_lock_style() == MusicTime;
863 if ((ipm && meter->beat() > insert_meter->beat()) || (!ipm && meter->frame() > insert_meter->frame())) {
868 } else if (insert_tempo) {
869 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
870 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
873 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
874 if ((ipm && tempo->pulse() > insert_tempo->pulse()) || (!ipm && tempo->frame() > insert_tempo->frame())) {
881 _metrics.insert (i, section);
882 //dump (_metrics, std::cout);
887 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const double& pulse, TempoSection::Type type)
890 Glib::Threads::RWLock::WriterLock lm (lock);
891 TempoSection& first (first_tempo());
892 if (ts.pulse() != first.pulse()) {
893 remove_tempo_locked (ts);
894 add_tempo_locked (tempo, pulse, true, type);
896 first.set_type (type);
898 /* cannot move the first tempo section */
899 *static_cast<Tempo*>(&first) = tempo;
900 recompute_map (_metrics);
905 PropertyChanged (PropertyChange ());
909 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const framepos_t& frame, TempoSection::Type type)
912 Glib::Threads::RWLock::WriterLock lm (lock);
913 TempoSection& first (first_tempo());
914 if (ts.frame() != first.frame()) {
915 remove_tempo_locked (ts);
916 add_tempo_locked (tempo, frame, true, type);
918 first.set_type (type);
919 first.set_pulse (0.0);
920 first.set_position_lock_style (AudioTime);
922 /* cannot move the first tempo section */
923 *static_cast<Tempo*>(&first) = tempo;
924 recompute_map (_metrics);
929 PropertyChanged (PropertyChange ());
933 TempoMap::add_tempo (const Tempo& tempo, const double& pulse, ARDOUR::TempoSection::Type type)
935 TempoSection* ts = 0;
937 Glib::Threads::RWLock::WriterLock lm (lock);
938 ts = add_tempo_locked (tempo, pulse, true, type);
941 PropertyChanged (PropertyChange ());
947 TempoMap::add_tempo (const Tempo& tempo, const framepos_t& frame, ARDOUR::TempoSection::Type type)
949 TempoSection* ts = 0;
951 Glib::Threads::RWLock::WriterLock lm (lock);
952 ts = add_tempo_locked (tempo, frame, true, type);
956 PropertyChanged (PropertyChange ());
962 TempoMap::add_tempo_locked (const Tempo& tempo, double pulse, bool recompute, ARDOUR::TempoSection::Type type)
964 TempoSection* t = new TempoSection (pulse, tempo.beats_per_minute(), tempo.note_type(), type);
969 solve_map (_metrics, t, t->pulse());
970 recompute_meters (_metrics);
977 TempoMap::add_tempo_locked (const Tempo& tempo, framepos_t frame, bool recompute, ARDOUR::TempoSection::Type type)
979 TempoSection* t = new TempoSection (frame, tempo.beats_per_minute(), tempo.note_type(), type);
984 solve_map (_metrics, t, t->frame());
985 recompute_meters (_metrics);
992 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where)
995 Glib::Threads::RWLock::WriterLock lm (lock);
998 remove_meter_locked (ms);
999 add_meter_locked (meter, bbt_to_beats_locked (_metrics, where), where, true);
1001 MeterSection& first (first_meter());
1002 /* cannot move the first meter section */
1003 *static_cast<Meter*>(&first) = meter;
1004 first.set_position_lock_style (AudioTime);
1006 recompute_map (_metrics);
1009 PropertyChanged (PropertyChange ());
1013 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const framepos_t& frame)
1016 Glib::Threads::RWLock::WriterLock lm (lock);
1018 const double beat = ms.beat();
1019 const BBT_Time bbt = ms.bbt();
1022 remove_meter_locked (ms);
1023 add_meter_locked (meter, frame, beat, bbt, true);
1025 MeterSection& first (first_meter());
1026 TempoSection& first_t (first_tempo());
1027 /* cannot move the first meter section */
1028 *static_cast<Meter*>(&first) = meter;
1029 first.set_position_lock_style (AudioTime);
1030 first.set_pulse (0.0);
1031 first.set_frame (frame);
1032 pair<double, BBT_Time> beat = make_pair (0.0, BBT_Time (1, 1, 0));
1033 first.set_beat (beat);
1034 first_t.set_frame (first.frame());
1035 first_t.set_pulse (0.0);
1036 first_t.set_position_lock_style (AudioTime);
1038 recompute_map (_metrics);
1040 PropertyChanged (PropertyChange ());
1045 TempoMap::add_meter (const Meter& meter, const double& beat, const BBT_Time& where)
1047 MeterSection* m = 0;
1049 Glib::Threads::RWLock::WriterLock lm (lock);
1050 m = add_meter_locked (meter, beat, where, true);
1055 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
1056 dump (_metrics, std::cerr);
1060 PropertyChanged (PropertyChange ());
1066 TempoMap::add_meter (const Meter& meter, const framepos_t& frame, const double& beat, const Timecode::BBT_Time& where)
1068 MeterSection* m = 0;
1070 Glib::Threads::RWLock::WriterLock lm (lock);
1071 m = add_meter_locked (meter, frame, beat, where, true);
1076 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
1077 dump (_metrics, std::cerr);
1081 PropertyChanged (PropertyChange ());
1087 TempoMap::add_meter_locked (const Meter& meter, double beat, const BBT_Time& where, bool recompute)
1089 /* a new meter always starts a new bar on the first beat. so
1090 round the start time appropriately. remember that
1091 `where' is based on the existing tempo map, not
1092 the result after we insert the new meter.
1096 const double pulse = pulse_at_beat_locked (_metrics, beat);
1097 MeterSection* new_meter = new MeterSection (pulse, beat, where, meter.divisions_per_bar(), meter.note_divisor());
1099 do_insert (new_meter);
1102 solve_map (_metrics, new_meter, where);
1109 TempoMap::add_meter_locked (const Meter& meter, framepos_t frame, double beat, const Timecode::BBT_Time& where, bool recompute)
1111 /* add meter-locked tempo */
1112 TempoSection* t = add_tempo_locked (tempo_at_locked (_metrics, frame), frame, true, TempoSection::Ramp);
1114 t->set_locked_to_meter (true);
1117 MeterSection* new_meter = new MeterSection (frame, beat, where, meter.divisions_per_bar(), meter.note_divisor());
1118 new_meter->set_pulse (pulse_at_frame_locked (_metrics, frame));
1120 do_insert (new_meter);
1123 solve_map (_metrics, new_meter, frame);
1130 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
1132 Tempo newtempo (beats_per_minute, note_type);
1135 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1136 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1141 Glib::Threads::RWLock::WriterLock lm (lock);
1142 *((Tempo*) t) = newtempo;
1143 recompute_map (_metrics);
1145 PropertyChanged (PropertyChange ());
1152 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
1154 Tempo newtempo (beats_per_minute, note_type);
1157 TempoSection* first;
1158 Metrics::iterator i;
1160 /* find the TempoSection immediately preceding "where"
1163 for (first = 0, i = _metrics.begin(), prev = 0; i != _metrics.end(); ++i) {
1165 if ((*i)->frame() > where) {
1171 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1184 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
1194 Glib::Threads::RWLock::WriterLock lm (lock);
1195 /* cannot move the first tempo section */
1196 *((Tempo*)prev) = newtempo;
1197 recompute_map (_metrics);
1200 PropertyChanged (PropertyChange ());
1204 TempoMap::first_meter () const
1206 const MeterSection *m = 0;
1208 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1209 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
1214 fatal << _("programming error: no meter section in tempo map!") << endmsg;
1215 abort(); /*NOTREACHED*/
1220 TempoMap::first_meter ()
1222 MeterSection *m = 0;
1224 /* CALLER MUST HOLD LOCK */
1226 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1227 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
1232 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1233 abort(); /*NOTREACHED*/
1238 TempoMap::first_tempo () const
1240 const TempoSection *t = 0;
1242 /* CALLER MUST HOLD LOCK */
1244 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1245 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
1249 if (!t->movable()) {
1255 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1256 abort(); /*NOTREACHED*/
1261 TempoMap::first_tempo ()
1263 TempoSection *t = 0;
1265 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1266 if ((t = dynamic_cast<TempoSection *> (*i)) != 0) {
1270 if (!t->movable()) {
1276 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1277 abort(); /*NOTREACHED*/
1281 TempoMap::recompute_tempos (Metrics& metrics)
1283 TempoSection* prev_t = 0;
1285 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1288 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1292 if (!t->movable()) {
1300 if (t->position_lock_style() == AudioTime) {
1301 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1302 if (!t->locked_to_meter()) {
1303 t->set_pulse (prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate));
1307 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1308 t->set_frame (prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate));
1315 prev_t->set_c_func (0.0);
1318 /* tempos must be positioned correctly.
1319 the current approach is to use a meter's bbt time as its base position unit.
1320 this means that a meter's beat may change, but its bbt may not.
1321 an audio-locked meter requires a recomputation of pulse and beat (but not bbt),
1322 while a music-locked meter requires recomputations of frame pulse and beat (but not bbt)
1325 TempoMap::recompute_meters (Metrics& metrics)
1327 MeterSection* meter = 0;
1328 MeterSection* prev_m = 0;
1330 for (Metrics::const_iterator mi = metrics.begin(); mi != metrics.end(); ++mi) {
1331 if ((meter = dynamic_cast<MeterSection*> (*mi)) != 0) {
1332 if (meter->position_lock_style() == AudioTime) {
1334 pair<double, BBT_Time> b_bbt;
1335 TempoSection* meter_locked_tempo = 0;
1336 for (Metrics::const_iterator ii = metrics.begin(); ii != metrics.end(); ++ii) {
1338 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
1339 if ((t->locked_to_meter() || !t->movable()) && t->frame() == meter->frame()) {
1340 meter_locked_tempo = t;
1347 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1348 if (beats + prev_m->beat() != meter->beat()) {
1349 /* reordering caused a bbt change */
1350 b_bbt = make_pair (beats + prev_m->beat()
1351 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1352 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1354 } else if (meter->movable()) {
1355 b_bbt = make_pair (meter->beat(), meter->bbt());
1356 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1359 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
1361 if (meter_locked_tempo) {
1362 meter_locked_tempo->set_pulse (pulse);
1364 meter->set_beat (b_bbt);
1365 meter->set_pulse (pulse);
1370 pair<double, BBT_Time> new_beat;
1372 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1373 if (beats + prev_m->beat() != meter->beat()) {
1374 /* reordering caused a bbt change */
1375 new_beat = make_pair (beats + prev_m->beat()
1376 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1378 new_beat = make_pair (beats + prev_m->beat(), meter->bbt());
1380 pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
1382 /* shouldn't happen - the first is audio-locked */
1383 pulse = pulse_at_beat_locked (metrics, meter->beat());
1384 new_beat = make_pair (meter->beat(), meter->bbt());
1387 meter->set_beat (new_beat);
1388 meter->set_pulse (pulse);
1389 meter->set_frame (frame_at_pulse_locked (metrics, pulse));
1398 TempoMap::recompute_map (Metrics& metrics, framepos_t end)
1400 /* CALLER MUST HOLD WRITE LOCK */
1404 /* we will actually stop once we hit
1411 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
1414 /* silly call from Session::process() during startup
1419 recompute_tempos (metrics);
1420 recompute_meters (metrics);
1424 TempoMap::metric_at (framepos_t frame, Metrics::const_iterator* last) const
1426 Glib::Threads::RWLock::ReaderLock lm (lock);
1427 TempoMetric m (first_meter(), first_tempo());
1429 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1430 at something, because we insert the default tempo and meter during
1431 TempoMap construction.
1433 now see if we can find better candidates.
1436 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1438 if ((*i)->frame() > frame) {
1452 /* XX meters only */
1454 TempoMap::metric_at (BBT_Time bbt) const
1456 Glib::Threads::RWLock::ReaderLock lm (lock);
1457 TempoMetric m (first_meter(), first_tempo());
1459 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1460 at something, because we insert the default tempo and meter during
1461 TempoMap construction.
1463 now see if we can find better candidates.
1466 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1468 if ((mw = dynamic_cast<MeterSection*> (*i)) != 0) {
1469 BBT_Time section_start (mw->bbt());
1471 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1483 TempoMap::pulse_at_beat_locked (const Metrics& metrics, const double& beat) const
1485 MeterSection* prev_m = 0;
1487 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1489 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1490 if (prev_m && m->beat() > beat) {
1497 double const ret = prev_m->pulse() + ((beat - prev_m->beat()) / prev_m->note_divisor());
1502 TempoMap::pulse_at_beat (const double& beat) const
1504 Glib::Threads::RWLock::ReaderLock lm (lock);
1505 return pulse_at_beat_locked (_metrics, beat);
1509 TempoMap::beat_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1511 MeterSection* prev_m = 0;
1513 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1515 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1516 if (prev_m && m->pulse() > pulse) {
1517 if (((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > m->beat()) {
1525 double const ret = ((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat();
1530 TempoMap::beat_at_pulse (const double& pulse) const
1532 Glib::Threads::RWLock::ReaderLock lm (lock);
1533 return beat_at_pulse_locked (_metrics, pulse);
1536 /* tempo section based */
1538 TempoMap::pulse_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
1540 /* HOLD (at least) THE READER LOCK */
1541 TempoSection* prev_t = 0;
1543 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1545 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1549 if (prev_t && t->frame() > frame) {
1550 /*the previous ts is the one containing the frame */
1551 const double ret = prev_t->pulse_at_frame (frame, _frame_rate);
1558 /* treated as constant for this ts */
1559 const double pulses_in_section = (frame - prev_t->frame()) / prev_t->frames_per_pulse (_frame_rate);
1561 return pulses_in_section + prev_t->pulse();
1565 TempoMap::pulse_at_frame (const framecnt_t& frame) const
1567 Glib::Threads::RWLock::ReaderLock lm (lock);
1568 return pulse_at_frame_locked (_metrics, frame);
1571 /* tempo section based */
1573 TempoMap::frame_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1575 /* HOLD THE READER LOCK */
1577 const TempoSection* prev_t = 0;
1579 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1582 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1586 if (prev_t && t->pulse() > pulse) {
1587 return prev_t->frame_at_pulse (pulse, _frame_rate);
1593 /* must be treated as constant, irrespective of _type */
1594 double const pulses_in_section = pulse - prev_t->pulse();
1595 double const dtime = pulses_in_section * prev_t->frames_per_pulse (_frame_rate);
1597 framecnt_t const ret = (framecnt_t) floor (dtime) + prev_t->frame();
1603 TempoMap::frame_at_pulse (const double& pulse) const
1605 Glib::Threads::RWLock::ReaderLock lm (lock);
1606 return frame_at_pulse_locked (_metrics, pulse);
1609 /* meter section based */
1611 TempoMap::beat_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
1613 const TempoSection& ts = tempo_section_at_locked (metrics, frame);
1614 MeterSection* prev_m = 0;
1615 MeterSection* next_m = 0;
1617 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1619 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1620 if (prev_m && m->frame() > frame) {
1627 if (frame < prev_m->frame()) {
1630 const double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
1632 if (next_m && next_m->beat() < beat) {
1633 return next_m->beat();
1640 TempoMap::beat_at_frame (const framecnt_t& frame) const
1642 Glib::Threads::RWLock::ReaderLock lm (lock);
1643 return beat_at_frame_locked (_metrics, frame);
1646 /* meter section based */
1648 TempoMap::frame_at_beat_locked (const Metrics& metrics, const double& beat) const
1650 const TempoSection& prev_t = tempo_section_at_beat_locked (metrics, beat);
1651 MeterSection* prev_m = 0;
1653 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1655 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1656 if (prev_m && m->beat() > beat) {
1663 return prev_t.frame_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse(), _frame_rate);
1667 TempoMap::frame_at_beat (const double& beat) const
1669 Glib::Threads::RWLock::ReaderLock lm (lock);
1670 return frame_at_beat_locked (_metrics, beat);
1674 TempoMap::bbt_to_beats_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const
1676 /* CALLER HOLDS READ LOCK */
1678 MeterSection* prev_m = 0;
1680 /* because audio-locked meters have 'fake' integral beats,
1681 there is no pulse offset here.
1683 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1685 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1687 const double bars_to_m = (m->beat() - prev_m->beat()) / prev_m->divisions_per_bar();
1688 if ((bars_to_m + (prev_m->bbt().bars - 1)) > (bbt.bars - 1)) {
1696 const double remaining_bars = bbt.bars - prev_m->bbt().bars;
1697 const double remaining_bars_in_beats = remaining_bars * prev_m->divisions_per_bar();
1698 const double ret = remaining_bars_in_beats + prev_m->beat() + (bbt.beats - 1) + (bbt.ticks / BBT_Time::ticks_per_beat);
1704 TempoMap::bbt_to_beats (const Timecode::BBT_Time& bbt)
1706 Glib::Threads::RWLock::ReaderLock lm (lock);
1707 return bbt_to_beats_locked (_metrics, bbt);
1711 TempoMap::beats_to_bbt_locked (const Metrics& metrics, const double& b) const
1713 /* CALLER HOLDS READ LOCK */
1714 MeterSection* prev_m = 0;
1715 const double beats = (b < 0.0) ? 0.0 : b;
1717 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1718 MeterSection* m = 0;
1720 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1722 if (m->beat() > beats) {
1723 /* this is the meter after the one our beat is on*/
1732 const double beats_in_ms = beats - prev_m->beat();
1733 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1734 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1735 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1736 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1740 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1741 ret.beats = (uint32_t) floor (remaining_beats);
1742 ret.bars = total_bars;
1744 /* 0 0 0 to 1 1 0 - based mapping*/
1748 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1750 ret.ticks -= BBT_Time::ticks_per_beat;
1753 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1762 TempoMap::beats_to_bbt (const double& beats)
1764 Glib::Threads::RWLock::ReaderLock lm (lock);
1765 return beats_to_bbt_locked (_metrics, beats);
1769 TempoMap::pulse_to_bbt (const double& pulse)
1771 Glib::Threads::RWLock::ReaderLock lm (lock);
1772 MeterSection* prev_m = 0;
1774 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1775 MeterSection* m = 0;
1777 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1780 double const pulses_to_m = m->pulse() - prev_m->pulse();
1781 if (prev_m->pulse() + pulses_to_m > pulse) {
1782 /* this is the meter after the one our beat is on*/
1791 const double beats_in_ms = (pulse - prev_m->pulse()) * prev_m->note_divisor();
1792 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1793 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1794 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1795 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1799 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1800 ret.beats = (uint32_t) floor (remaining_beats);
1801 ret.bars = total_bars;
1803 /* 0 0 0 to 1 1 0 mapping*/
1807 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1809 ret.ticks -= BBT_Time::ticks_per_beat;
1812 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1821 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt)
1828 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1831 Glib::Threads::RWLock::ReaderLock lm (lock);
1832 const double beat = beat_at_frame_locked (_metrics, frame);
1834 bbt = beats_to_bbt_locked (_metrics, beat);
1837 /* meter section based */
1839 TempoMap::frame_time_locked (const Metrics& metrics, const BBT_Time& bbt) const
1841 /* HOLD THE READER LOCK */
1843 const framepos_t ret = frame_at_beat_locked (metrics, bbt_to_beats_locked (metrics, bbt));
1848 TempoMap::frame_time (const BBT_Time& bbt)
1851 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
1855 if (bbt.beats < 1) {
1856 throw std::logic_error ("beats are counted from one");
1858 Glib::Threads::RWLock::ReaderLock lm (lock);
1860 return frame_time_locked (_metrics, bbt);
1864 TempoMap::check_solved (const Metrics& metrics, bool by_frame) const
1866 TempoSection* prev_t = 0;
1867 MeterSection* prev_m = 0;
1869 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1872 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1877 if ((by_frame && t->frame() < prev_t->frame()) || (!by_frame && t->pulse() < prev_t->pulse())) {
1881 if (t->frame() == prev_t->frame()) {
1885 /* precision check ensures pulses and frames align.*/
1886 if (t->frame() != prev_t->frame_at_pulse (t->pulse(), _frame_rate)) {
1887 if (!t->locked_to_meter()) {
1895 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1896 if (prev_m && m->position_lock_style() == AudioTime) {
1897 TempoSection* t = const_cast<TempoSection*>(&tempo_section_at_locked (metrics, m->frame() - 1));
1898 const double nascent_m_pulse = ((m->beat() - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse();
1899 const framepos_t nascent_m_frame = t->frame_at_pulse (nascent_m_pulse, _frame_rate);
1901 if (t && (nascent_m_frame > m->frame() || nascent_m_frame < 0)) {
1915 TempoMap::set_active_tempos (const Metrics& metrics, const framepos_t& frame)
1917 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1919 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1920 if (!t->movable()) {
1921 t->set_active (true);
1924 if (t->movable() && t->active () && t->position_lock_style() == AudioTime && t->frame() < frame) {
1925 t->set_active (false);
1927 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() > frame) {
1928 t->set_active (true);
1929 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() == frame) {
1938 TempoMap::solve_map (Metrics& imaginary, TempoSection* section, const framepos_t& frame)
1940 TempoSection* prev_t = 0;
1941 TempoSection* section_prev = 0;
1942 framepos_t first_m_frame = 0;
1944 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
1946 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1947 if (!m->movable()) {
1948 first_m_frame = m->frame();
1953 if (section->movable() && frame <= first_m_frame) {
1957 section->set_active (true);
1958 section->set_frame (frame);
1960 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
1962 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1969 section_prev = prev_t;
1972 if (t->position_lock_style() == MusicTime) {
1973 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1974 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
1976 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1977 if (!t->locked_to_meter()) {
1978 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
1987 section_prev->set_c_func (section_prev->compute_c_func_frame (section->pulses_per_minute(), frame, _frame_rate));
1988 if (!section->locked_to_meter()) {
1989 section->set_pulse (section_prev->pulse_at_frame (frame, _frame_rate));
1993 if (section->position_lock_style() == MusicTime) {
1994 /* we're setting the frame */
1995 section->set_position_lock_style (AudioTime);
1996 recompute_tempos (imaginary);
1997 section->set_position_lock_style (MusicTime);
1999 recompute_tempos (imaginary);
2002 if (check_solved (imaginary, true)) {
2006 MetricSectionFrameSorter fcmp;
2007 imaginary.sort (fcmp);
2008 if (section->position_lock_style() == MusicTime) {
2009 /* we're setting the frame */
2010 section->set_position_lock_style (AudioTime);
2011 recompute_tempos (imaginary);
2012 section->set_position_lock_style (MusicTime);
2014 recompute_tempos (imaginary);
2017 if (check_solved (imaginary, true)) {
2025 TempoMap::solve_map (Metrics& imaginary, TempoSection* section, const double& pulse)
2027 TempoSection* prev_t = 0;
2028 TempoSection* section_prev = 0;
2030 section->set_pulse (pulse);
2032 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2034 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2038 if (!t->movable()) {
2045 section_prev = prev_t;
2048 if (t->position_lock_style() == MusicTime) {
2049 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
2050 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
2052 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
2053 if (!t->locked_to_meter()) {
2054 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
2062 section_prev->set_c_func (section_prev->compute_c_func_pulse (section->pulses_per_minute(), pulse, _frame_rate));
2063 section->set_frame (section_prev->frame_at_pulse (pulse, _frame_rate));
2066 if (section->position_lock_style() == AudioTime) {
2067 /* we're setting the pulse */
2068 section->set_position_lock_style (MusicTime);
2069 recompute_tempos (imaginary);
2070 section->set_position_lock_style (AudioTime);
2072 recompute_tempos (imaginary);
2075 if (check_solved (imaginary, false)) {
2079 MetricSectionSorter cmp;
2080 imaginary.sort (cmp);
2081 if (section->position_lock_style() == AudioTime) {
2082 /* we're setting the pulse */
2083 section->set_position_lock_style (MusicTime);
2084 recompute_tempos (imaginary);
2085 section->set_position_lock_style (AudioTime);
2087 recompute_tempos (imaginary);
2090 if (check_solved (imaginary, false)) {
2098 TempoMap::solve_map (Metrics& imaginary, MeterSection* section, const framepos_t& frame)
2100 /* disallow moving first meter past any subsequent one, and any movable meter before the first one */
2101 const MeterSection* other = &meter_section_at_locked (imaginary, frame);
2102 if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->frame() >= frame)) {
2106 if (!section->movable()) {
2107 /* lock the first tempo to our first meter */
2108 if (!set_active_tempos (imaginary, frame)) {
2113 /* it would make sense to bail out if there is no audio-locked meter,
2114 however it may be desirable to move a music-locked meter by frame at some point.
2116 TempoSection* meter_locked_tempo = 0;
2117 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2119 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
2120 if ((t->locked_to_meter() || !t->movable()) && t->frame() == section->frame()) {
2121 meter_locked_tempo = t;
2127 MeterSection* prev_m = 0;
2129 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2131 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2133 if (prev_m && section->movable()) {
2134 const double beats = (pulse_at_frame_locked (imaginary, frame) - prev_m->pulse()) * prev_m->note_divisor();
2135 if (beats + prev_m->beat() < section->beat()) {
2136 /* disallow position change if it will alter our beat
2137 we allow tempo changes to do this in recompute_meters().
2138 blocking this is an option, but i'm not convinced that
2139 this is what the user would actually want.
2140 here we set the frame/pulse corresponding to its musical position.
2143 if (meter_locked_tempo) {
2145 bool solved = false;
2146 TempoSection* tempo_copy = copy_metrics_and_point (imaginary, future_map, meter_locked_tempo);
2147 const double new_pulse = ((section->beat() - prev_m->beat())
2148 / prev_m->note_divisor()) + prev_m->pulse();
2149 const framepos_t smallest_frame = frame_at_pulse_locked (future_map, new_pulse);
2150 if ((solved = solve_map (future_map, tempo_copy, smallest_frame))) {
2151 meter_locked_tempo->set_pulse (new_pulse);
2152 solve_map (imaginary, meter_locked_tempo, smallest_frame);
2153 section->set_frame (smallest_frame);
2154 section->set_pulse (new_pulse);
2159 Metrics::const_iterator d = future_map.begin();
2160 while (d != future_map.end()) {
2171 if (meter_locked_tempo) {
2173 bool solved = false;
2175 TempoSection* tempo_copy = copy_metrics_and_point (imaginary, future_map, meter_locked_tempo);
2176 MeterSection* meter_copy = const_cast<MeterSection*> (&meter_section_at_locked (future_map, section->frame()));
2177 meter_copy->set_frame (frame);
2179 if ((solved = solve_map (future_map, tempo_copy, frame))) {
2180 section->set_frame (frame);
2181 meter_locked_tempo->set_pulse (((section->beat() - prev_m->beat())
2182 / prev_m->note_divisor()) + prev_m->pulse());
2183 solve_map (imaginary, meter_locked_tempo, frame);
2188 Metrics::const_iterator d = future_map.begin();
2189 while (d != future_map.end()) {
2200 /* not movable (first meter atm) */
2201 if (meter_locked_tempo) {
2203 bool solved = false;
2204 TempoSection* tempo_copy = copy_metrics_and_point (imaginary, future_map, meter_locked_tempo);
2206 tempo_copy->set_frame (frame);
2207 tempo_copy->set_pulse (0.0);
2209 if ((solved = solve_map (future_map, tempo_copy, frame))) {
2210 section->set_frame (frame);
2211 meter_locked_tempo->set_frame (frame);
2212 meter_locked_tempo->set_pulse (0.0);
2213 solve_map (imaginary, meter_locked_tempo, frame);
2218 Metrics::const_iterator d = future_map.begin();
2219 while (d != future_map.end()) {
2231 pair<double, BBT_Time> b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2232 section->set_beat (b_bbt);
2233 section->set_pulse (0.0);
2243 MetricSectionFrameSorter fcmp;
2244 imaginary.sort (fcmp);
2245 if (section->position_lock_style() == MusicTime) {
2246 /* we're setting the frame */
2247 section->set_position_lock_style (AudioTime);
2248 recompute_meters (imaginary);
2249 section->set_position_lock_style (MusicTime);
2251 recompute_meters (imaginary);
2258 TempoMap::solve_map (Metrics& imaginary, MeterSection* section, const BBT_Time& when)
2260 /* disallow setting section to an existing meter's bbt */
2261 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2263 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2264 if (m != section && m->bbt().bars == when.bars) {
2270 MeterSection* prev_m = 0;
2271 MeterSection* section_prev = 0;
2273 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2275 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2276 pair<double, BBT_Time> b_bbt;
2277 double new_pulse = 0.0;
2279 if (prev_m && m->bbt().bars > when.bars && !section_prev){
2280 section_prev = prev_m;
2281 const double beats = (when.bars - section_prev->bbt().bars) * section_prev->divisions_per_bar();
2282 const double pulse = (beats / section_prev->note_divisor()) + section_prev->pulse();
2283 pair<double, BBT_Time> b_bbt = make_pair (beats + section_prev->beat(), when);
2285 section->set_beat (b_bbt);
2286 section->set_pulse (pulse);
2287 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2292 if (m->position_lock_style() == AudioTime) {
2293 TempoSection* meter_locked_tempo = 0;
2294 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2296 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
2297 if ((t->locked_to_meter() || !t->movable()) && t->frame() == m->frame()) {
2298 meter_locked_tempo = t;
2305 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2307 if (beats + prev_m->beat() != m->beat()) {
2308 /* tempo/ meter change caused a change in beat (bar). */
2309 b_bbt = make_pair (beats + prev_m->beat()
2310 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2311 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2312 } else if (m->movable()) {
2313 b_bbt = make_pair (m->beat(), m->bbt());
2314 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2317 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2319 if (meter_locked_tempo) {
2320 meter_locked_tempo->set_pulse (new_pulse);
2321 recompute_tempos (imaginary);
2323 m->set_beat (b_bbt);
2324 m->set_pulse (new_pulse);
2328 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2329 if (beats + prev_m->beat() != m->beat()) {
2330 /* tempo/ meter change caused a change in beat (bar). */
2331 b_bbt = make_pair (beats + prev_m->beat()
2332 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2334 b_bbt = make_pair (beats + prev_m->beat()
2337 new_pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2338 m->set_beat (b_bbt);
2339 m->set_pulse (new_pulse);
2340 m->set_frame (frame_at_pulse_locked (imaginary, new_pulse));
2347 if (!section_prev) {
2349 const double beats = (when.bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
2350 const double pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2351 pair<double, BBT_Time> b_bbt = make_pair (beats + prev_m->beat(), when);
2353 section->set_beat (b_bbt);
2354 section->set_pulse (pulse);
2355 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2358 MetricSectionSorter cmp;
2359 imaginary.sort (cmp);
2361 if (section->position_lock_style() == AudioTime) {
2362 /* we're setting the pulse */
2363 section->set_position_lock_style (MusicTime);
2364 recompute_meters (imaginary);
2365 section->set_position_lock_style (AudioTime);
2367 recompute_meters (imaginary);
2373 /** places a copy of _metrics into copy and returns a pointer
2374 * to section's equivalent in copy.
2377 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, TempoSection* section)
2379 TempoSection* ret = 0;
2381 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2384 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2386 ret = new TempoSection (*t);
2387 copy.push_back (ret);
2391 TempoSection* cp = new TempoSection (*t);
2392 copy.push_back (cp);
2394 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
2395 MeterSection* cp = new MeterSection (*m);
2396 copy.push_back (cp);
2404 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, MeterSection* section)
2406 MeterSection* ret = 0;
2408 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2411 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2412 TempoSection* cp = new TempoSection (*t);
2413 copy.push_back (cp);
2416 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
2418 ret = new MeterSection (*m);
2419 copy.push_back (ret);
2422 MeterSection* cp = new MeterSection (*m);
2423 copy.push_back (cp);
2431 TempoMap::can_solve_bbt (TempoSection* ts, const BBT_Time& bbt)
2434 TempoSection* tempo_copy = 0;
2437 Glib::Threads::RWLock::ReaderLock lm (lock);
2438 tempo_copy = copy_metrics_and_point (_metrics, copy, ts);
2444 const double beat = bbt_to_beats_locked (copy, bbt);
2445 const bool ret = solve_map (copy, tempo_copy, pulse_at_beat_locked (copy, beat));
2447 Metrics::const_iterator d = copy.begin();
2448 while (d != copy.end()) {
2457 * This is for a gui that needs to know the frame of a tempo section if it were to be moved to some bbt time,
2458 * taking any possible reordering as a consequence of this into account.
2459 * @param section - the section to be altered
2460 * @param bpm - the new Tempo
2461 * @param bbt - the bbt where the altered tempo will fall
2462 * @return returns - the position in frames where the new tempo section will lie.
2465 TempoMap::predict_tempo_frame (TempoSection* section, const BBT_Time& bbt)
2467 Glib::Threads::RWLock::ReaderLock lm (lock);
2470 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, section);
2474 const double beat = bbt_to_beats_locked (future_map, bbt);
2476 if (solve_map (future_map, tempo_copy, pulse_at_beat_locked (future_map, beat))) {
2477 ret = tempo_copy->frame();
2479 ret = section->frame();
2482 Metrics::const_iterator d = future_map.begin();
2483 while (d != future_map.end()) {
2491 TempoMap::predict_tempo_pulse (TempoSection* section, const framepos_t& frame)
2493 Glib::Threads::RWLock::ReaderLock lm (lock);
2496 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, section);
2498 if (solve_map (future_map, tempo_copy, frame)) {
2499 ret = tempo_copy->pulse();
2501 ret = section->pulse();
2504 Metrics::const_iterator d = future_map.begin();
2505 while (d != future_map.end()) {
2513 TempoMap::gui_move_tempo_frame (TempoSection* ts, const framepos_t& frame)
2517 Glib::Threads::RWLock::WriterLock lm (lock);
2518 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2519 if (solve_map (future_map, tempo_copy, frame)) {
2520 solve_map (_metrics, ts, frame);
2521 recompute_meters (_metrics);
2525 Metrics::const_iterator d = future_map.begin();
2526 while (d != future_map.end()) {
2531 MetricPositionChanged (); // Emit Signal
2535 TempoMap::gui_move_tempo_beat (TempoSection* ts, const double& beat)
2539 Glib::Threads::RWLock::WriterLock lm (lock);
2540 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2541 if (solve_map (future_map, tempo_copy, pulse_at_beat_locked (future_map, beat))) {
2542 solve_map (_metrics, ts, pulse_at_beat_locked (_metrics, beat));
2543 recompute_meters (_metrics);
2547 Metrics::const_iterator d = future_map.begin();
2548 while (d != future_map.end()) {
2553 MetricPositionChanged (); // Emit Signal
2557 TempoMap::gui_move_meter (MeterSection* ms, const framepos_t& frame)
2561 Glib::Threads::RWLock::WriterLock lm (lock);
2562 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2563 if (solve_map (future_map, copy, frame)) {
2564 solve_map (_metrics, ms, frame);
2565 recompute_tempos (_metrics);
2569 Metrics::const_iterator d = future_map.begin();
2570 while (d != future_map.end()) {
2575 MetricPositionChanged (); // Emit Signal
2579 TempoMap::gui_move_meter (MeterSection* ms, const Timecode::BBT_Time& bbt)
2583 Glib::Threads::RWLock::WriterLock lm (lock);
2584 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2585 if (solve_map (future_map, copy, bbt)) {
2586 solve_map (_metrics, ms, bbt);
2587 recompute_tempos (_metrics);
2591 Metrics::const_iterator d = future_map.begin();
2592 while (d != future_map.end()) {
2597 MetricPositionChanged (); // Emit Signal
2601 TempoMap::gui_change_tempo (TempoSection* ts, const Tempo& bpm)
2604 bool can_solve = false;
2606 Glib::Threads::RWLock::WriterLock lm (lock);
2607 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2608 tempo_copy->set_beats_per_minute (bpm.beats_per_minute());
2609 recompute_tempos (future_map);
2611 if (check_solved (future_map, true)) {
2612 ts->set_beats_per_minute (bpm.beats_per_minute());
2613 recompute_map (_metrics);
2618 Metrics::const_iterator d = future_map.begin();
2619 while (d != future_map.end()) {
2624 MetricPositionChanged (); // Emit Signal
2630 TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
2633 TempoSection* ts = 0;
2635 if (frame <= first_meter().frame()) {
2639 if (ms->position_lock_style() == AudioTime) {
2640 /* disabled for now due to faked tempo locked to meter pulse */
2645 Glib::Threads::RWLock::WriterLock lm (lock);
2646 ts = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, ms->frame() - 1));
2650 TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
2651 TempoSection* prev_to_prev_t = 0;
2652 const frameoffset_t fr_off = frame - ms->frame();
2653 double new_bpm = 0.0;
2655 if (prev_t && prev_t->pulse() > 0.0) {
2656 prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, prev_t->frame() - 1));
2659 /* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
2660 constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
2662 double contribution = 0.0;
2663 frameoffset_t frame_contribution = 0;
2664 frameoffset_t prev_t_frame_contribution = fr_off;
2666 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2667 /* prev to prev_t's position will remain constant in terms of frame and pulse. lets use frames. */
2668 contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (ms->frame() - prev_to_prev_t->frame());
2669 frame_contribution = contribution * (double) fr_off;
2670 prev_t_frame_contribution = fr_off - frame_contribution;
2673 if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
2675 if (prev_t->position_lock_style() == MusicTime) {
2676 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2677 new_bpm = prev_t->beats_per_minute() * ((ms->frame() - prev_t->frame())
2678 / (double) (ms->frame() + prev_t_frame_contribution - prev_t->frame()));
2681 /* prev to prev is irrelevant */
2682 const double meter_pulse = prev_t->pulse_at_frame (ms->frame(), _frame_rate);
2683 const double frame_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
2685 if (frame_pulse != prev_t->pulse()) {
2686 new_bpm = prev_t->beats_per_minute() * ((meter_pulse - prev_t->pulse()) / (frame_pulse - prev_t->pulse()));
2688 new_bpm = prev_t->beats_per_minute();
2693 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2694 new_bpm = prev_t->beats_per_minute() * ((ms->frame() - prev_t->frame())
2695 / (double) (ms->frame() + prev_t_frame_contribution - prev_t->frame()));
2697 /* prev_to_prev_t is irrelevant */
2699 if (frame != prev_t->frame()) {
2700 new_bpm = prev_t->beats_per_minute() * ((ms->frame() - prev_t->frame()) / (double) (frame - prev_t->frame()));
2702 new_bpm = prev_t->beats_per_minute();
2706 } else if (prev_t->c_func() < 0.0) {
2707 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2708 new_bpm = prev_t->tempo_at_frame (prev_t->frame() + frame_contribution, _frame_rate) * (double) prev_t->note_type();
2710 /* prev_to_prev_t is irrelevant */
2711 new_bpm = prev_t->tempo_at_frame (prev_t->frame() + fr_off, _frame_rate) * (double) prev_t->note_type();
2714 } else if (prev_t->c_func() > 0.0) {
2715 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2716 new_bpm = prev_t->tempo_at_frame (prev_t->frame() - frame_contribution, _frame_rate) * (double) prev_t->note_type();
2718 /* prev_to_prev_t is irrelevant */
2719 new_bpm = prev_t->tempo_at_frame (prev_t->frame() - fr_off, _frame_rate) * (double) prev_t->note_type();
2723 /* limits - a bit clunky, but meh */
2724 const double diff = (prev_t->tempo_at_frame (frame, _frame_rate) * prev_t->note_type()) - prev_t->beats_per_minute();
2725 if (diff > -1.0 && diff < 1.0) {
2726 new_bpm = prev_t->beats_per_minute() * ((ms->frame() - prev_t->frame())
2727 / (double) ((ms->frame() + prev_t_frame_contribution) - prev_t->frame()));
2730 prev_t->set_beats_per_minute (new_bpm);
2731 recompute_tempos (future_map);
2732 recompute_meters (future_map);
2734 if (check_solved (future_map, true)) {
2736 prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, ms->frame() - 1));
2737 prev_t->set_beats_per_minute (new_bpm);
2738 recompute_tempos (_metrics);
2740 if (ms->position_lock_style() == AudioTime) {
2741 ms->set_frame (frame);
2744 recompute_meters (_metrics);
2748 Metrics::const_iterator d = future_map.begin();
2749 while (d != future_map.end()) {
2754 MetricPositionChanged (); // Emit Signal
2758 TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame, const double& pulse)
2761 Ts (future prev_t) Tnext
2764 |----------|----------
2771 Glib::Threads::RWLock::WriterLock lm (lock);
2777 TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
2778 TempoSection* prev_to_prev_t = 0;
2779 const frameoffset_t fr_off = end_frame - frame;
2781 if (prev_t && prev_t->pulse() > 0.0) {
2782 prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, prev_t->frame() - 1));
2785 TempoSection* next_t = 0;
2786 for (Metrics::iterator i = future_map.begin(); i != future_map.end(); ++i) {
2787 TempoSection* t = 0;
2788 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2789 if (t->frame() > ts->frame()) {
2796 /* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
2797 constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
2799 double contribution = 0.0;
2800 double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
2802 if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2803 contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
2806 frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
2807 double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
2810 if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
2812 if (prev_t->position_lock_style() == MusicTime) {
2813 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2815 new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
2816 / (double) ((frame + prev_t_frame_contribution) - prev_to_prev_t->frame()));
2819 /* prev to prev is irrelevant */
2821 if (start_pulse != prev_t->pulse()) {
2822 new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
2824 new_bpm = prev_t->beats_per_minute();
2829 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2830 new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
2831 / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
2833 /* prev_to_prev_t is irrelevant */
2835 if (end_frame != prev_t->frame()) {
2836 new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
2838 new_bpm = prev_t->beats_per_minute();
2846 const framepos_t pulse_pos = prev_t->frame_at_pulse (pulse, _frame_rate);
2848 if (prev_to_prev_t) {
2850 frame_ratio = (((pulse_pos - fr_off) - prev_to_prev_t->frame()) / (double) ((pulse_pos) - prev_to_prev_t->frame()));
2851 pulse_ratio = ((start_pulse - prev_to_prev_t->pulse()) / (end_pulse - prev_to_prev_t->pulse()));
2854 frame_ratio = (((pulse_pos - fr_off) - prev_t->frame()) / (double) ((pulse_pos) - prev_t->frame()));
2855 pulse_ratio = (start_pulse / end_pulse);
2857 new_bpm = prev_t->beats_per_minute() * (pulse_ratio * frame_ratio);
2860 prev_t->set_beats_per_minute (new_bpm);
2861 recompute_tempos (future_map);
2862 recompute_meters (future_map);
2864 if (check_solved (future_map, true)) {
2865 ts->set_beats_per_minute (new_bpm);
2866 recompute_tempos (_metrics);
2867 recompute_meters (_metrics);
2871 Metrics::const_iterator d = future_map.begin();
2872 while (d != future_map.end()) {
2877 MetricPositionChanged (); // Emit Signal
2881 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
2883 Glib::Threads::RWLock::ReaderLock lm (lock);
2885 const double tick_at_time = beat_at_frame_locked (_metrics, pos) * BBT_Time::ticks_per_beat;
2886 const double bbt_ticks = bbt.ticks + (bbt.beats * BBT_Time::ticks_per_beat);
2887 const double total_beats = (tick_at_time + bbt_ticks) / BBT_Time::ticks_per_beat;
2889 return frame_at_beat_locked (_metrics, total_beats);
2893 TempoMap::round_to_bar (framepos_t fr, RoundMode dir)
2895 return round_to_type (fr, dir, Bar);
2899 TempoMap::round_to_beat (framepos_t fr, RoundMode dir)
2901 return round_to_type (fr, dir, Beat);
2905 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, RoundMode dir)
2907 Glib::Threads::RWLock::ReaderLock lm (lock);
2908 uint32_t ticks = (uint32_t) floor (beat_at_frame_locked (_metrics, fr) * BBT_Time::ticks_per_beat);
2909 uint32_t beats = (uint32_t) floor (ticks / BBT_Time::ticks_per_beat);
2910 uint32_t ticks_one_subdivisions_worth = (uint32_t) BBT_Time::ticks_per_beat / sub_num;
2912 ticks -= beats * BBT_Time::ticks_per_beat;
2915 /* round to next (or same iff dir == RoundUpMaybe) */
2917 uint32_t mod = ticks % ticks_one_subdivisions_worth;
2919 if (mod == 0 && dir == RoundUpMaybe) {
2920 /* right on the subdivision, which is fine, so do nothing */
2922 } else if (mod == 0) {
2923 /* right on the subdivision, so the difference is just the subdivision ticks */
2924 ticks += ticks_one_subdivisions_worth;
2927 /* not on subdivision, compute distance to next subdivision */
2929 ticks += ticks_one_subdivisions_worth - mod;
2932 if (ticks >= BBT_Time::ticks_per_beat) {
2933 ticks -= BBT_Time::ticks_per_beat;
2935 } else if (dir < 0) {
2937 /* round to previous (or same iff dir == RoundDownMaybe) */
2939 uint32_t difference = ticks % ticks_one_subdivisions_worth;
2941 if (difference == 0 && dir == RoundDownAlways) {
2942 /* right on the subdivision, but force-rounding down,
2943 so the difference is just the subdivision ticks */
2944 difference = ticks_one_subdivisions_worth;
2947 if (ticks < difference) {
2948 ticks = BBT_Time::ticks_per_beat - ticks;
2950 ticks -= difference;
2954 /* round to nearest */
2957 /* compute the distance to the previous and next subdivision */
2959 if ((rem = fmod ((double) ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
2961 /* closer to the next subdivision, so shift forward */
2963 ticks = lrint (ticks + (ticks_one_subdivisions_worth - rem));
2965 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", ticks));
2967 if (ticks > BBT_Time::ticks_per_beat) {
2969 ticks -= BBT_Time::ticks_per_beat;
2970 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", beats));
2973 } else if (rem > 0) {
2975 /* closer to previous subdivision, so shift backward */
2979 /* can't go backwards past zero, so ... */
2982 /* step back to previous beat */
2984 ticks = lrint (BBT_Time::ticks_per_beat - rem);
2985 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", beats));
2987 ticks = lrint (ticks - rem);
2988 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", ticks));
2991 /* on the subdivision, do nothing */
2995 const framepos_t ret_frame = frame_at_beat_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat));
3001 TempoMap::round_bbt (BBT_Time& when, const int32_t& sub_num, RoundMode dir)
3003 if (sub_num == -1) {
3008 } else if (dir < 0) {
3012 const double bpb = meter_section_at_beat (bbt_to_beats_locked (_metrics, when)).divisions_per_bar();
3013 if ((double) when.beats > bpb / 2.0) {
3022 } else if (sub_num == 0) {
3023 const double bpb = meter_section_at_beat (bbt_to_beats_locked (_metrics, when)).divisions_per_bar();
3024 if ((double) when.ticks > BBT_Time::ticks_per_beat / 2.0) {
3026 while ((double) when.beats > bpb) {
3028 when.beats -= (uint32_t) floor (bpb);
3036 const uint32_t ticks_one_subdivisions_worth = BBT_Time::ticks_per_beat / sub_num;
3039 /* round to next (or same iff dir == RoundUpMaybe) */
3041 uint32_t mod = when.ticks % ticks_one_subdivisions_worth;
3043 if (mod == 0 && dir == RoundUpMaybe) {
3044 /* right on the subdivision, which is fine, so do nothing */
3046 } else if (mod == 0) {
3047 /* right on the subdivision, so the difference is just the subdivision ticks */
3048 when.ticks += ticks_one_subdivisions_worth;
3051 /* not on subdivision, compute distance to next subdivision */
3053 when.ticks += ticks_one_subdivisions_worth - mod;
3056 if (when.ticks >= BBT_Time::ticks_per_beat) {
3057 when.ticks -= BBT_Time::ticks_per_beat;
3060 } else if (dir < 0) {
3061 /* round to previous (or same iff dir == RoundDownMaybe) */
3063 uint32_t difference = when.ticks % ticks_one_subdivisions_worth;
3065 if (difference == 0 && dir == RoundDownAlways) {
3066 /* right on the subdivision, but force-rounding down,
3067 so the difference is just the subdivision ticks */
3068 difference = ticks_one_subdivisions_worth;
3071 if (when.ticks < difference) {
3072 when.ticks = BBT_Time::ticks_per_beat - when.ticks;
3074 when.ticks -= difference;
3078 /* round to nearest */ double rem;
3079 if ((rem = fmod ((double) when.ticks, (double) ticks_one_subdivisions_worth)) > (ticks_one_subdivisions_worth / 2.0)) {
3080 /* closer to the next subdivision, so shift forward */
3082 when.ticks = when.ticks + (ticks_one_subdivisions_worth - rem);
3084 if (when.ticks > Timecode::BBT_Time::ticks_per_beat) {
3086 when.ticks -= Timecode::BBT_Time::ticks_per_beat;
3089 } else if (rem > 0) {
3090 /* closer to previous subdivision, so shift backward */
3092 if (rem > when.ticks) {
3093 if (when.beats == 0) {
3094 /* can't go backwards past zero, so ... */
3096 /* step back to previous beat */
3098 when.ticks = Timecode::BBT_Time::ticks_per_beat - rem;
3100 when.ticks = when.ticks - rem;
3107 TempoMap::round_to_type (framepos_t frame, RoundMode dir, BBTPointType type)
3109 Glib::Threads::RWLock::ReaderLock lm (lock);
3111 const double beat_at_framepos = beat_at_frame_locked (_metrics, frame);
3112 BBT_Time bbt (beats_to_bbt_locked (_metrics, beat_at_framepos));
3117 /* find bar previous to 'frame' */
3120 return frame_time_locked (_metrics, bbt);
3122 } else if (dir > 0) {
3123 /* find bar following 'frame' */
3127 return frame_time_locked (_metrics, bbt);
3129 /* true rounding: find nearest bar */
3130 framepos_t raw_ft = frame_time_locked (_metrics, bbt);
3133 framepos_t prev_ft = frame_time_locked (_metrics, bbt);
3135 framepos_t next_ft = frame_time_locked (_metrics, bbt);
3137 if ((raw_ft - prev_ft) > (next_ft - prev_ft) / 2) {
3148 return frame_at_beat_locked (_metrics, floor (beat_at_framepos));
3149 } else if (dir > 0) {
3150 return frame_at_beat_locked (_metrics, ceil (beat_at_framepos));
3152 return frame_at_beat_locked (_metrics, floor (beat_at_framepos + 0.5));
3161 TempoMap::get_grid (vector<TempoMap::BBTPoint>& points,
3162 framepos_t lower, framepos_t upper)
3164 Glib::Threads::RWLock::ReaderLock lm (lock);
3165 int32_t cnt = ceil (beat_at_frame_locked (_metrics, lower));
3167 /* although the map handles negative beats, bbt doesn't. */
3171 while (pos < upper) {
3172 pos = frame_at_beat_locked (_metrics, cnt);
3173 const TempoSection tempo = tempo_section_at_locked (_metrics, pos);
3174 const MeterSection meter = meter_section_at_locked (_metrics, pos);
3175 const BBT_Time bbt = beats_to_bbt (cnt);
3176 points.push_back (BBTPoint (meter, tempo_at_locked (_metrics, pos), pos, bbt.bars, bbt.beats, tempo.c_func()));
3182 TempoMap::tempo_section_at (framepos_t frame) const
3184 Glib::Threads::RWLock::ReaderLock lm (lock);
3185 return tempo_section_at_locked (_metrics, frame);
3189 TempoMap::tempo_section_at_locked (const Metrics& metrics, framepos_t frame) const
3191 Metrics::const_iterator i;
3192 TempoSection* prev = 0;
3194 for (i = metrics.begin(); i != metrics.end(); ++i) {
3197 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3201 if (prev && t->frame() > frame) {
3211 abort(); /*NOTREACHED*/
3218 TempoMap::tempo_section_at_beat_locked (const Metrics& metrics, const double& beat) const
3220 TempoSection* prev_t = 0;
3221 const MeterSection* prev_m = &meter_section_at_beat_locked (metrics, beat);
3223 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3225 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3226 if (prev_t && ((t->pulse() - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > beat) {
3237 TempoMap::tempo_section_at_pulse_locked (const Metrics& metrics, const double& pulse) const
3239 TempoSection* prev_t = 0;
3241 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3243 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3244 if (prev_t && t->pulse() > pulse) {
3254 /* don't use this to calculate length (the tempo is only correct for this frame).
3255 do that stuff based on the beat_at_frame and frame_at_beat api
3258 TempoMap::frames_per_beat_at (const framepos_t& frame, const framecnt_t& sr) const
3260 Glib::Threads::RWLock::ReaderLock lm (lock);
3262 const TempoSection* ts_at = &tempo_section_at_locked (_metrics, frame);
3263 const TempoSection* ts_after = 0;
3264 Metrics::const_iterator i;
3266 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3269 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3273 if ((*i)->frame() > frame) {
3281 return (60.0 * _frame_rate) / (ts_at->tempo_at_frame (frame, _frame_rate));
3283 /* must be treated as constant tempo */
3284 return ts_at->frames_per_beat (_frame_rate);
3288 TempoMap::tempo_at_locked (const Metrics& metrics, const framepos_t& frame) const
3290 TempoSection* prev_t = 0;
3292 Metrics::const_iterator i;
3294 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3296 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3300 if ((prev_t) && t->frame() > frame) {
3301 /* t is the section past frame */
3302 const double ret_bpm = prev_t->tempo_at_frame (frame, _frame_rate) * prev_t->note_type();
3303 const Tempo ret_tempo (ret_bpm, prev_t->note_type());
3310 const double ret = prev_t->beats_per_minute();
3311 const Tempo ret_tempo (ret, prev_t->note_type ());
3317 TempoMap::tempo_at (const framepos_t& frame) const
3319 Glib::Threads::RWLock::ReaderLock lm (lock);
3320 return tempo_at_locked (_metrics, frame);
3324 TempoMap::meter_section_at_locked (const Metrics& metrics, framepos_t frame) const
3326 Metrics::const_iterator i;
3327 MeterSection* prev = 0;
3329 for (i = metrics.begin(); i != metrics.end(); ++i) {
3332 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
3334 if (prev && (*i)->frame() > frame) {
3344 abort(); /*NOTREACHED*/
3352 TempoMap::meter_section_at (framepos_t frame) const
3354 Glib::Threads::RWLock::ReaderLock lm (lock);
3355 return meter_section_at_locked (_metrics, frame);
3359 TempoMap::meter_section_at_beat_locked (const Metrics& metrics, const double& beat) const
3361 MeterSection* prev_m = 0;
3363 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3365 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
3366 if (prev_m && m->beat() > beat) {
3377 TempoMap::meter_section_at_beat (double beat) const
3379 Glib::Threads::RWLock::ReaderLock lm (lock);
3380 return meter_section_at_beat_locked (_metrics, beat);
3384 TempoMap::meter_at (framepos_t frame) const
3386 TempoMetric m (metric_at (frame));
3391 TempoMap::fix_legacy_session ()
3393 MeterSection* prev_m = 0;
3394 TempoSection* prev_t = 0;
3396 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3400 if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3401 if (!m->movable()) {
3402 pair<double, BBT_Time> bbt = make_pair (0.0, BBT_Time (1, 1, 0));
3406 m->set_position_lock_style (AudioTime);
3411 pair<double, BBT_Time> start = make_pair (((m->bbt().bars - 1) * prev_m->note_divisor())
3412 + (m->bbt().beats - 1)
3413 + (m->bbt().ticks / BBT_Time::ticks_per_beat)
3415 m->set_beat (start);
3416 const double start_beat = ((m->bbt().bars - 1) * prev_m->note_divisor())
3417 + (m->bbt().beats - 1)
3418 + (m->bbt().ticks / BBT_Time::ticks_per_beat);
3419 m->set_pulse (start_beat / prev_m->note_divisor());
3422 } else if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3428 if (!t->movable()) {
3431 t->set_position_lock_style (AudioTime);
3437 const double beat = ((t->legacy_bbt().bars - 1) * ((prev_m) ? prev_m->note_divisor() : 4.0))
3438 + (t->legacy_bbt().beats - 1)
3439 + (t->legacy_bbt().ticks / BBT_Time::ticks_per_beat);
3441 t->set_pulse (beat / prev_m->note_divisor());
3443 /* really shouldn't happen but.. */
3444 t->set_pulse (beat / 4.0);
3453 TempoMap::get_state ()
3455 Metrics::const_iterator i;
3456 XMLNode *root = new XMLNode ("TempoMap");
3459 Glib::Threads::RWLock::ReaderLock lm (lock);
3460 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3461 root->add_child_nocopy ((*i)->get_state());
3469 TempoMap::set_state (const XMLNode& node, int /*version*/)
3472 Glib::Threads::RWLock::WriterLock lm (lock);
3475 XMLNodeConstIterator niter;
3476 Metrics old_metrics (_metrics);
3479 nlist = node.children();
3481 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
3482 XMLNode* child = *niter;
3484 if (child->name() == TempoSection::xml_state_node_name) {
3487 TempoSection* ts = new TempoSection (*child);
3488 _metrics.push_back (ts);
3491 catch (failed_constructor& err){
3492 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3493 _metrics = old_metrics;
3497 } else if (child->name() == MeterSection::xml_state_node_name) {
3500 MeterSection* ms = new MeterSection (*child);
3501 _metrics.push_back (ms);
3504 catch (failed_constructor& err) {
3505 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3506 _metrics = old_metrics;
3512 if (niter == nlist.end()) {
3513 MetricSectionSorter cmp;
3514 _metrics.sort (cmp);
3517 /* check for legacy sessions where bbt was the base musical unit for tempo */
3518 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3520 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3521 if (t->legacy_bbt().bars != 0) {
3522 fix_legacy_session();
3529 /* check for multiple tempo/meters at the same location, which
3530 ardour2 somehow allowed.
3533 Metrics::iterator prev = _metrics.end();
3534 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3535 if (prev != _metrics.end()) {
3537 MeterSection* prev_m;
3539 TempoSection* prev_t;
3540 if ((prev_m = dynamic_cast<MeterSection*>(*prev)) != 0 && (ms = dynamic_cast<MeterSection*>(*i)) != 0) {
3541 if (prev_m->pulse() == ms->pulse()) {
3542 cerr << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3543 error << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3546 } else if ((prev_t = dynamic_cast<TempoSection*>(*prev)) != 0 && (ts = dynamic_cast<TempoSection*>(*i)) != 0) {
3547 if (prev_t->pulse() == ts->pulse()) {
3548 cerr << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3549 error << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3557 recompute_map (_metrics);
3560 PropertyChanged (PropertyChange ());
3566 TempoMap::dump (const Metrics& metrics, std::ostream& o) const
3568 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
3569 const MeterSection* m;
3570 const TempoSection* t;
3571 const TempoSection* prev_t = 0;
3573 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3575 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
3576 o << "Tempo @ " << *i << t->beats_per_minute() << " BPM (pulse = 1/" << t->note_type() << ") at " << t->pulse() << " frame= " << t->frame() << " (movable? "
3577 << t->movable() << ')' << " pos lock: " << enum_2_string (t->position_lock_style()) << std::endl;
3578 o << "current : " << t->beats_per_minute() << " | " << t->pulse() << " | " << t->frame() << std::endl;
3580 o << "previous : " << prev_t->beats_per_minute() << " | " << prev_t->pulse() << " | " << prev_t->frame() << std::endl;
3581 o << "calculated : " << prev_t->tempo_at_pulse (t->pulse()) * prev_t->note_type() << " | " << prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate) << " | " << prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate) << std::endl;
3584 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
3585 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->bbt() << " frame= " << m->frame()
3586 << " pulse: " << m->pulse() << " beat : " << m->beat() << " pos lock: " << enum_2_string (m->position_lock_style()) << " (movable? " << m->movable() << ')' << endl;
3589 o << "------" << std::endl;
3593 TempoMap::n_tempos() const
3595 Glib::Threads::RWLock::ReaderLock lm (lock);
3598 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3599 if (dynamic_cast<const TempoSection*>(*i) != 0) {
3608 TempoMap::n_meters() const
3610 Glib::Threads::RWLock::ReaderLock lm (lock);
3613 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3614 if (dynamic_cast<const MeterSection*>(*i) != 0) {
3623 TempoMap::insert_time (framepos_t where, framecnt_t amount)
3626 Glib::Threads::RWLock::WriterLock lm (lock);
3627 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3628 if ((*i)->frame() >= where && (*i)->movable ()) {
3629 (*i)->set_frame ((*i)->frame() + amount);
3633 /* now reset the BBT time of all metrics, based on their new
3634 * audio time. This is the only place where we do this reverse
3638 Metrics::iterator i;
3639 const MeterSection* meter;
3640 const TempoSection* tempo;
3644 meter = &first_meter ();
3645 tempo = &first_tempo ();
3650 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
3653 MetricSection* prev = 0;
3655 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3658 //TempoMetric metric (*meter, *tempo);
3659 MeterSection* ms = const_cast<MeterSection*>(meter);
3660 TempoSection* ts = const_cast<TempoSection*>(tempo);
3663 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3667 ts->set_pulse (t->pulse());
3669 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3670 ts->set_pulse (m->pulse());
3672 ts->set_frame (prev->frame());
3676 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3677 pair<double, BBT_Time> start = make_pair (m->beat(), m->bbt());
3678 ms->set_beat (start);
3679 ms->set_pulse (m->pulse());
3681 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3685 const double beat = beat_at_pulse_locked (_metrics, t->pulse());
3686 pair<double, BBT_Time> start = make_pair (beat, beats_to_bbt_locked (_metrics, beat));
3687 ms->set_beat (start);
3688 ms->set_pulse (t->pulse());
3690 ms->set_frame (prev->frame());
3694 // metric will be at frames=0 bbt=1|1|0 by default
3695 // which is correct for our purpose
3698 // cerr << bbt << endl;
3700 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3704 t->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3706 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3707 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3708 bbt_time (m->frame(), bbt);
3710 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
3716 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
3717 /* round up to next beat */
3723 if (bbt.beats != 1) {
3724 /* round up to next bar */
3729 pair<double, BBT_Time> start = make_pair (beat_at_frame_locked (_metrics, m->frame()), bbt);
3730 m->set_beat (start);
3731 m->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3733 // cerr << "NEW METER, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3735 fatal << _("programming error: unhandled MetricSection type") << endmsg;
3736 abort(); /*NOTREACHED*/
3742 recompute_map (_metrics);
3746 PropertyChanged (PropertyChange ());
3749 TempoMap::remove_time (framepos_t where, framecnt_t amount)
3753 std::list<MetricSection*> metric_kill_list;
3755 TempoSection* last_tempo = NULL;
3756 MeterSection* last_meter = NULL;
3757 bool tempo_after = false; // is there a tempo marker at the first sample after the removed range?
3758 bool meter_after = false; // is there a meter marker likewise?
3760 Glib::Threads::RWLock::WriterLock lm (lock);
3761 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3762 if ((*i)->frame() >= where && (*i)->frame() < where+amount) {
3763 metric_kill_list.push_back(*i);
3764 TempoSection *lt = dynamic_cast<TempoSection*> (*i);
3767 MeterSection *lm = dynamic_cast<MeterSection*> (*i);
3771 else if ((*i)->frame() >= where) {
3772 // TODO: make sure that moved tempo/meter markers are rounded to beat/bar boundaries
3773 (*i)->set_frame ((*i)->frame() - amount);
3774 if ((*i)->frame() == where) {
3775 // marker was immediately after end of range
3776 tempo_after = dynamic_cast<TempoSection*> (*i);
3777 meter_after = dynamic_cast<MeterSection*> (*i);
3783 //find the last TEMPO and METER metric (if any) and move it to the cut point so future stuff is correct
3784 if (last_tempo && !tempo_after) {
3785 metric_kill_list.remove(last_tempo);
3786 last_tempo->set_frame(where);
3789 if (last_meter && !meter_after) {
3790 metric_kill_list.remove(last_meter);
3791 last_meter->set_frame(where);
3795 //remove all the remaining metrics
3796 for (std::list<MetricSection*>::iterator i = metric_kill_list.begin(); i != metric_kill_list.end(); ++i) {
3797 _metrics.remove(*i);
3802 recompute_map (_metrics);
3805 PropertyChanged (PropertyChange ());
3809 /** Add some (fractional) beats to a session frame position, and return the result in frames.
3810 * pos can be -ve, if required.
3813 TempoMap::framepos_plus_beats (framepos_t pos, Evoral::Beats beats) const
3815 return frame_at_beat (beat_at_frame (pos) + beats.to_double());
3818 /** Subtract some (fractional) beats from a frame position, and return the result in frames */
3820 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::Beats beats) const
3822 return frame_at_beat (beat_at_frame (pos) - beats.to_double());
3825 /** Add the BBT interval op to pos and return the result */
3827 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
3829 Glib::Threads::RWLock::ReaderLock lm (lock);
3831 BBT_Time pos_bbt = beats_to_bbt_locked (_metrics, beat_at_frame_locked (_metrics, pos));
3832 pos_bbt.ticks += op.ticks;
3833 if (pos_bbt.ticks >= BBT_Time::ticks_per_beat) {
3835 pos_bbt.ticks -= BBT_Time::ticks_per_beat;
3837 pos_bbt.beats += op.beats;
3838 /* the meter in effect will start on the bar */
3839 double divisions_per_bar = meter_section_at_beat (bbt_to_beats_locked (_metrics, BBT_Time (pos_bbt.bars + op.bars, 1, 0))).divisions_per_bar();
3840 while (pos_bbt.beats >= divisions_per_bar + 1) {
3842 divisions_per_bar = meter_section_at_beat (bbt_to_beats_locked (_metrics, BBT_Time (pos_bbt.bars + op.bars, 1, 0))).divisions_per_bar();
3843 pos_bbt.beats -= divisions_per_bar;
3845 pos_bbt.bars += op.bars;
3847 return frame_time_locked (_metrics, pos_bbt);
3850 /** Count the number of beats that are equivalent to distance when going forward,
3854 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
3856 return Evoral::Beats (beat_at_frame (pos + distance) - beat_at_frame (pos));
3860 bool operator() (const BBT_Time& a, const BBT_Time& b) {
3866 operator<< (std::ostream& o, const Meter& m) {
3867 return o << m.divisions_per_bar() << '/' << m.note_divisor();
3871 operator<< (std::ostream& o, const Tempo& t) {
3872 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
3876 operator<< (std::ostream& o, const MetricSection& section) {
3878 o << "MetricSection @ " << section.frame() << ' ';
3880 const TempoSection* ts;
3881 const MeterSection* ms;
3883 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
3884 o << *((const Tempo*) ts);
3885 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
3886 o << *((const Meter*) ms);