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)
76 : MetricSection (0.0, 0, MusicTime)
77 , Tempo (TempoMap::default_tempo())
80 , _locked_to_meter (false)
82 XMLProperty const * 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, 0, MusicTime), Meter (TempoMap::default_meter())
458 XMLProperty const * prop;
463 framepos_t frame = 0;
464 pair<double, BBT_Time> start;
466 if ((prop = node.property ("start")) != 0) {
467 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
471 error << _("MeterSection XML node has an illegal \"start\" value") << endmsg;
473 /* legacy session - start used to be in bbt*/
474 info << _("Legacy session detected - MeterSection XML node will be altered.") << endmsg;
479 if ((prop = node.property ("pulse")) != 0) {
480 if (sscanf (prop->value().c_str(), "%lf", &pulse) != 1) {
481 error << _("MeterSection XML node has an illegal \"pulse\" value") << endmsg;
486 if ((prop = node.property ("beat")) != 0) {
487 if (sscanf (prop->value().c_str(), "%lf", &beat) != 1) {
488 error << _("MeterSection XML node has an illegal \"beat\" value") << endmsg;
494 if ((prop = node.property ("bbt")) == 0) {
495 warning << _("MeterSection XML node has no \"bbt\" property") << endmsg;
496 } else if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
500 error << _("MeterSection XML node has an illegal \"bbt\" value") << endmsg;
501 throw failed_constructor();
507 if ((prop = node.property ("frame")) != 0) {
508 if (sscanf (prop->value().c_str(), "%li", &frame) != 1) {
509 error << _("MeterSection XML node has an illegal \"frame\" value") << endmsg;
515 /* beats-per-bar is old; divisions-per-bar is new */
517 if ((prop = node.property ("divisions-per-bar")) == 0) {
518 if ((prop = node.property ("beats-per-bar")) == 0) {
519 error << _("MeterSection XML node has no \"beats-per-bar\" or \"divisions-per-bar\" property") << endmsg;
520 throw failed_constructor();
523 if (sscanf (prop->value().c_str(), "%lf", &_divisions_per_bar) != 1 || _divisions_per_bar < 0.0) {
524 error << _("MeterSection XML node has an illegal \"divisions-per-bar\" value") << endmsg;
525 throw failed_constructor();
528 if ((prop = node.property ("note-type")) == 0) {
529 error << _("MeterSection XML node has no \"note-type\" property") << endmsg;
530 throw failed_constructor();
532 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) {
533 error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg;
534 throw failed_constructor();
537 if ((prop = node.property ("movable")) == 0) {
538 error << _("MeterSection XML node has no \"movable\" property") << endmsg;
539 throw failed_constructor();
542 set_movable (string_is_affirmative (prop->value()));
544 if ((prop = node.property ("lock-style")) == 0) {
545 warning << _("MeterSection XML node has no \"lock-style\" property") << endmsg;
547 set_position_lock_style (MusicTime);
549 set_position_lock_style (AudioTime);
552 set_position_lock_style (PositionLockStyle (string_2_enum (prop->value(), position_lock_style())));
557 MeterSection::get_state() const
559 XMLNode *root = new XMLNode (xml_state_node_name);
563 snprintf (buf, sizeof (buf), "%lf", pulse());
564 root->add_property ("pulse", buf);
565 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
569 root->add_property ("bbt", buf);
570 snprintf (buf, sizeof (buf), "%lf", beat());
571 root->add_property ("beat", buf);
572 snprintf (buf, sizeof (buf), "%f", _note_type);
573 root->add_property ("note-type", buf);
574 snprintf (buf, sizeof (buf), "%li", frame());
575 root->add_property ("frame", buf);
576 root->add_property ("lock-style", enum_2_string (position_lock_style()));
577 snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
578 root->add_property ("divisions-per-bar", buf);
579 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
580 root->add_property ("movable", buf);
585 /***********************************************************************/
589 Tempo is the rate of the musical pulse.
590 Meters divide the pulses into measures and beats.
592 Note that Tempo::beats_per_minute() has nothing to do with musical beats.
593 It should rather be thought of as tempo note divisions per minute.
595 TempoSections, which are nice to think of in whole pulses per minute,
596 and MeterSecions which divide tempo pulses into measures (via divisions_per_bar)
597 and beats (via note_divisor) are used to form a tempo map.
598 TempoSections and MeterSections may be locked to either audio or music (position lock style).
599 We construct the tempo map by first using the frame or pulse position (depending on position lock style) of each tempo.
600 We then use this pulse/frame layout to find the beat & pulse or frame position of each meter (again depending on lock style).
602 Having done this, we can now find any one of tempo, beat, frame or pulse if a beat, frame, pulse or tempo is known.
604 With tepo sections potentially being ramped, meters provide a way of mapping beats to whole pulses without
605 referring to the tempo function(s) involved as the distance in whole pulses between a meter and a subsequent beat is
606 sb->beat() - meter->beat() / meter->note_divisor().
607 Because every meter falls on a known pulse, (derived from its bar), the rest is easy as the duration in pulses between
608 two meters is of course
609 (meater_b->bar - meter_a->bar) * meter_a->divisions_per_bar / meter_a->note_divisor.
611 Below, beat calculations are based on meter sections and all pulse and tempo calculations are based on tempo sections.
612 Beat to frame conversion of course requires the use of meter and tempo.
614 Remembering that ramped tempo sections interact, it is important to avoid referring to any other tempos when moving tempo sections,
615 Here, beats (meters) are used to determine the new pulse (see predict_tempo_position())
617 The first tempo and first meter are special. they must move together, and must be locked to audio.
618 Audio locked tempos which lie before the first meter are made inactive.
619 They will be re-activated if the first meter is again placed before them.
621 Both tempos and meters have a pulse position and a frame position.
622 Meters also have a beat position, which is always 0.0 for the first meter.
624 A tempo locked to music is locked to musical pulses.
625 A meter locked to music is locked to beats.
627 Recomputing the tempo map is the process where the 'missing' position
628 (tempo pulse or meter pulse & beat in the case of AudioTime, frame for MusicTime) is calculated.
630 It is important to keep the _metrics in an order that makes sense.
631 Because ramped MusicTime and AudioTime tempos can interact with each other,
632 reordering is frequent. Care must be taken to keep _metrics in a solved state.
633 Solved means ordered by frame or pulse with frame-accurate precision (see check_solved()).
635 struct MetricSectionSorter {
636 bool operator() (const MetricSection* a, const MetricSection* b) {
637 return a->pulse() < b->pulse();
641 struct MetricSectionFrameSorter {
642 bool operator() (const MetricSection* a, const MetricSection* b) {
643 return a->frame() < b->frame();
647 TempoMap::TempoMap (framecnt_t fr)
650 BBT_Time start (1, 1, 0);
652 TempoSection *t = new TempoSection (0.0, 0, _default_tempo.beats_per_minute(), _default_tempo.note_type(), TempoSection::Ramp, AudioTime);
653 MeterSection *m = new MeterSection (0.0, 0, 0.0, start, _default_meter.divisions_per_bar(), _default_meter.note_divisor(), AudioTime);
655 t->set_movable (false);
656 m->set_movable (false);
658 /* note: frame time is correct (zero) for both of these */
660 _metrics.push_back (t);
661 _metrics.push_back (m);
665 TempoMap::~TempoMap ()
667 Metrics::const_iterator d = _metrics.begin();
668 while (d != _metrics.end()) {
676 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
678 bool removed = false;
681 Glib::Threads::RWLock::WriterLock lm (lock);
682 if ((removed = remove_tempo_locked (tempo))) {
683 if (complete_operation) {
684 recompute_map (_metrics);
689 if (removed && complete_operation) {
690 PropertyChanged (PropertyChange ());
695 TempoMap::remove_tempo_locked (const TempoSection& tempo)
699 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
700 if (dynamic_cast<TempoSection*> (*i) != 0) {
701 if (tempo.frame() == (*i)->frame()) {
702 if ((*i)->movable()) {
715 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
717 bool removed = false;
720 Glib::Threads::RWLock::WriterLock lm (lock);
721 if ((removed = remove_meter_locked (tempo))) {
722 if (complete_operation) {
723 recompute_map (_metrics);
728 if (removed && complete_operation) {
729 PropertyChanged (PropertyChange ());
734 TempoMap::remove_meter_locked (const MeterSection& meter)
738 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
740 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
741 if (meter.frame() == (*i)->frame()) {
742 if (t->locked_to_meter()) {
751 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
752 if (dynamic_cast<MeterSection*> (*i) != 0) {
753 if (meter.frame() == (*i)->frame()) {
754 if ((*i)->movable()) {
767 TempoMap::do_insert (MetricSection* section)
769 bool need_add = true;
770 /* we only allow new meters to be inserted on beat 1 of an existing
774 if ((m = dynamic_cast<MeterSection*>(section)) != 0) {
776 if ((m->bbt().beats != 1) || (m->bbt().ticks != 0)) {
778 pair<double, BBT_Time> corrected = make_pair (m->beat(), m->bbt());
779 corrected.second.beats = 1;
780 corrected.second.ticks = 0;
781 corrected.first = beat_at_bbt_locked (_metrics, corrected.second);
782 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
783 m->bbt(), corrected.second) << endmsg;
784 //m->set_pulse (corrected);
788 /* Look for any existing MetricSection that is of the same type and
789 in the same bar as the new one, and remove it before adding
790 the new one. Note that this means that if we find a matching,
791 existing section, we can break out of the loop since we're
792 guaranteed that there is only one such match.
795 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
797 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
798 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
799 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
800 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
802 if (tempo && insert_tempo) {
805 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
806 if ((ipm && tempo->pulse() == insert_tempo->pulse()) || (!ipm && tempo->frame() == insert_tempo->frame())) {
808 if (!tempo->movable()) {
810 /* can't (re)move this section, so overwrite
811 * its data content (but not its properties as
815 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(insert_tempo));
816 (*i)->set_position_lock_style (AudioTime);
818 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
819 t->set_type (insert_tempo->type());
829 } else if (meter && insert_meter) {
833 bool const ipm = insert_meter->position_lock_style() == MusicTime;
835 if ((ipm && meter->beat() == insert_meter->beat()) || (!ipm && meter->frame() == insert_meter->frame())) {
837 if (!meter->movable()) {
839 /* can't (re)move this section, so overwrite
840 * its data content (but not its properties as
844 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(insert_meter));
845 (*i)->set_position_lock_style (AudioTime);
855 /* non-matching types, so we don't care */
859 /* Add the given MetricSection, if we didn't just reset an existing
864 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
865 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
868 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
869 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
872 bool const ipm = insert_meter->position_lock_style() == MusicTime;
873 if ((ipm && meter->beat() > insert_meter->beat()) || (!ipm && meter->frame() > insert_meter->frame())) {
878 } else if (insert_tempo) {
879 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
880 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
883 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
884 if ((ipm && tempo->pulse() > insert_tempo->pulse()) || (!ipm && tempo->frame() > insert_tempo->frame())) {
891 _metrics.insert (i, section);
892 //dump (_metrics, std::cout);
897 TempoMap::add_tempo (const Tempo& tempo, const double& pulse, const framepos_t& frame, ARDOUR::TempoSection::Type type, PositionLockStyle pls)
899 TempoSection* ts = 0;
901 Glib::Threads::RWLock::WriterLock lm (lock);
902 ts = add_tempo_locked (tempo, pulse, frame, type, pls, true);
906 PropertyChanged (PropertyChange ());
912 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const double& pulse, const framepos_t& frame, TempoSection::Type type, PositionLockStyle pls)
914 const bool locked_to_meter = ts.locked_to_meter();
917 Glib::Threads::RWLock::WriterLock lm (lock);
918 TempoSection& first (first_tempo());
919 if (ts.frame() != first.frame()) {
920 remove_tempo_locked (ts);
921 add_tempo_locked (tempo, pulse, frame, type, pls, true, locked_to_meter);
923 first.set_type (type);
924 first.set_pulse (0.0);
925 first.set_frame (frame);
926 first.set_position_lock_style (AudioTime);
928 /* cannot move the first tempo section */
929 *static_cast<Tempo*>(&first) = tempo;
930 recompute_map (_metrics);
935 PropertyChanged (PropertyChange ());
939 TempoMap::add_tempo_locked (const Tempo& tempo, double pulse, framepos_t frame
940 , TempoSection::Type type, PositionLockStyle pls, bool recompute, bool locked_to_meter)
942 TempoSection* t = new TempoSection (pulse, frame, tempo.beats_per_minute(), tempo.note_type(), type, pls);
943 t->set_locked_to_meter (locked_to_meter);
948 if (pls == AudioTime) {
949 solve_map_frame (_metrics, t, t->frame());
951 solve_map_pulse (_metrics, t, t->pulse());
953 recompute_meters (_metrics);
960 TempoMap::add_meter (const Meter& meter, const double& beat, const Timecode::BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
964 Glib::Threads::RWLock::WriterLock lm (lock);
965 m = add_meter_locked (meter, beat, where, frame, pls, true);
970 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
971 dump (_metrics, std::cerr);
975 PropertyChanged (PropertyChange ());
980 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
983 Glib::Threads::RWLock::WriterLock lm (lock);
984 const double beat = beat_at_bbt_locked (_metrics, where);
987 remove_meter_locked (ms);
988 add_meter_locked (meter, beat, where, frame, pls, true);
990 MeterSection& first (first_meter());
991 TempoSection& first_t (first_tempo());
992 /* cannot move the first meter section */
993 *static_cast<Meter*>(&first) = meter;
994 first.set_position_lock_style (AudioTime);
995 first.set_pulse (0.0);
996 first.set_frame (frame);
997 pair<double, BBT_Time> beat = make_pair (0.0, BBT_Time (1, 1, 0));
998 first.set_beat (beat);
999 first_t.set_frame (first.frame());
1000 first_t.set_pulse (0.0);
1001 first_t.set_position_lock_style (AudioTime);
1002 recompute_map (_metrics);
1006 PropertyChanged (PropertyChange ());
1010 TempoMap::add_meter_locked (const Meter& meter, double beat, const Timecode::BBT_Time& where, framepos_t frame, PositionLockStyle pls, bool recompute)
1012 const MeterSection& prev_m = meter_section_at_locked (_metrics, frame - 1);
1013 const double pulse = ((where.bars - prev_m.bbt().bars) * (prev_m.divisions_per_bar() / prev_m.note_divisor())) + prev_m.pulse();
1015 if (pls == AudioTime) {
1016 /* add meter-locked tempo */
1017 add_tempo_locked (tempo_at_locked (_metrics, frame), pulse, frame, TempoSection::Ramp, AudioTime, true, true);
1020 MeterSection* new_meter = new MeterSection (pulse, frame, beat, where, meter.divisions_per_bar(), meter.note_divisor(), pls);
1022 do_insert (new_meter);
1026 if (pls == AudioTime) {
1027 solve_map_frame (_metrics, new_meter, frame);
1029 solve_map_bbt (_metrics, new_meter, where);
1037 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
1039 Tempo newtempo (beats_per_minute, note_type);
1042 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1043 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1048 Glib::Threads::RWLock::WriterLock lm (lock);
1049 *((Tempo*) t) = newtempo;
1050 recompute_map (_metrics);
1052 PropertyChanged (PropertyChange ());
1059 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
1061 Tempo newtempo (beats_per_minute, note_type);
1064 TempoSection* first;
1065 Metrics::iterator i;
1067 /* find the TempoSection immediately preceding "where"
1070 for (first = 0, i = _metrics.begin(), prev = 0; i != _metrics.end(); ++i) {
1072 if ((*i)->frame() > where) {
1078 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1091 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
1101 Glib::Threads::RWLock::WriterLock lm (lock);
1102 /* cannot move the first tempo section */
1103 *((Tempo*)prev) = newtempo;
1104 recompute_map (_metrics);
1107 PropertyChanged (PropertyChange ());
1111 TempoMap::first_meter () const
1113 const MeterSection *m = 0;
1115 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1116 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
1121 fatal << _("programming error: no meter section in tempo map!") << endmsg;
1122 abort(); /*NOTREACHED*/
1127 TempoMap::first_meter ()
1129 MeterSection *m = 0;
1131 /* CALLER MUST HOLD LOCK */
1133 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1134 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
1139 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1140 abort(); /*NOTREACHED*/
1145 TempoMap::first_tempo () const
1147 const TempoSection *t = 0;
1149 /* CALLER MUST HOLD LOCK */
1151 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1152 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
1156 if (!t->movable()) {
1162 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1163 abort(); /*NOTREACHED*/
1168 TempoMap::first_tempo ()
1170 TempoSection *t = 0;
1172 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1173 if ((t = dynamic_cast<TempoSection *> (*i)) != 0) {
1177 if (!t->movable()) {
1183 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1184 abort(); /*NOTREACHED*/
1188 TempoMap::recompute_tempos (Metrics& metrics)
1190 TempoSection* prev_t = 0;
1192 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1195 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1199 if (!t->movable()) {
1207 if (t->position_lock_style() == AudioTime) {
1208 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1209 if (!t->locked_to_meter()) {
1210 t->set_pulse (prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate));
1214 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1215 t->set_frame (prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate));
1222 prev_t->set_c_func (0.0);
1225 /* tempos must be positioned correctly.
1226 the current approach is to use a meter's bbt time as its base position unit.
1227 an audio-locked meter requires a recomputation of pulse and beat (but not bbt),
1228 while a music-locked meter requires recomputations of frame pulse and beat (but not bbt)
1231 TempoMap::recompute_meters (Metrics& metrics)
1233 MeterSection* meter = 0;
1234 MeterSection* prev_m = 0;
1236 for (Metrics::const_iterator mi = metrics.begin(); mi != metrics.end(); ++mi) {
1237 if ((meter = dynamic_cast<MeterSection*> (*mi)) != 0) {
1238 if (meter->position_lock_style() == AudioTime) {
1240 pair<double, BBT_Time> b_bbt;
1241 TempoSection* meter_locked_tempo = 0;
1242 for (Metrics::const_iterator ii = metrics.begin(); ii != metrics.end(); ++ii) {
1244 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
1245 if ((t->locked_to_meter() || !t->movable()) && t->frame() == meter->frame()) {
1246 meter_locked_tempo = t;
1253 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1254 if (beats + prev_m->beat() != meter->beat()) {
1255 /* reordering caused a bbt change */
1256 b_bbt = make_pair (beats + prev_m->beat()
1257 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1258 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1260 } else if (meter->movable()) {
1261 b_bbt = make_pair (meter->beat(), meter->bbt());
1262 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1265 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
1267 if (meter_locked_tempo) {
1268 meter_locked_tempo->set_pulse (pulse);
1270 meter->set_beat (b_bbt);
1271 meter->set_pulse (pulse);
1276 pair<double, BBT_Time> b_bbt;
1278 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1279 if (beats + prev_m->beat() != meter->beat()) {
1280 /* reordering caused a bbt change */
1281 b_bbt = make_pair (beats + prev_m->beat()
1282 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1284 b_bbt = make_pair (beats + prev_m->beat(), meter->bbt());
1286 pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
1288 /* shouldn't happen - the first is audio-locked */
1289 pulse = pulse_at_beat_locked (metrics, meter->beat());
1290 b_bbt = make_pair (meter->beat(), meter->bbt());
1293 meter->set_beat (b_bbt);
1294 meter->set_pulse (pulse);
1295 meter->set_frame (frame_at_pulse_locked (metrics, pulse));
1304 TempoMap::recompute_map (Metrics& metrics, framepos_t end)
1306 /* CALLER MUST HOLD WRITE LOCK */
1310 /* we will actually stop once we hit
1317 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
1320 /* silly call from Session::process() during startup
1325 recompute_tempos (metrics);
1326 recompute_meters (metrics);
1330 TempoMap::metric_at (framepos_t frame, Metrics::const_iterator* last) const
1332 Glib::Threads::RWLock::ReaderLock lm (lock);
1333 TempoMetric m (first_meter(), first_tempo());
1335 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1336 at something, because we insert the default tempo and meter during
1337 TempoMap construction.
1339 now see if we can find better candidates.
1342 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1344 if ((*i)->frame() > frame) {
1358 /* XX meters only */
1360 TempoMap::metric_at (BBT_Time bbt) const
1362 Glib::Threads::RWLock::ReaderLock lm (lock);
1363 TempoMetric m (first_meter(), first_tempo());
1365 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1366 at something, because we insert the default tempo and meter during
1367 TempoMap construction.
1369 now see if we can find better candidates.
1372 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1374 if ((mw = dynamic_cast<MeterSection*> (*i)) != 0) {
1375 BBT_Time section_start (mw->bbt());
1377 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1389 TempoMap::pulse_at_beat (const double& beat) const
1391 Glib::Threads::RWLock::ReaderLock lm (lock);
1392 return pulse_at_beat_locked (_metrics, beat);
1396 TempoMap::pulse_at_beat_locked (const Metrics& metrics, const double& beat) const
1398 MeterSection* prev_m = 0;
1400 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1402 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1403 if (prev_m && m->beat() > beat) {
1410 double const ret = prev_m->pulse() + ((beat - prev_m->beat()) / prev_m->note_divisor());
1415 TempoMap::beat_at_pulse (const double& pulse) const
1417 Glib::Threads::RWLock::ReaderLock lm (lock);
1418 return beat_at_pulse_locked (_metrics, pulse);
1422 TempoMap::beat_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1424 MeterSection* prev_m = 0;
1426 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1428 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1429 if (prev_m && m->pulse() > pulse) {
1430 if (((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > m->beat()) {
1438 double const ret = ((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat();
1443 TempoMap::pulse_at_frame (const framecnt_t& frame) const
1445 Glib::Threads::RWLock::ReaderLock lm (lock);
1446 return pulse_at_frame_locked (_metrics, frame);
1449 /* tempo section based */
1451 TempoMap::pulse_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
1453 /* HOLD (at least) THE READER LOCK */
1454 TempoSection* prev_t = 0;
1456 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1458 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1462 if (prev_t && t->frame() > frame) {
1463 /*the previous ts is the one containing the frame */
1464 const double ret = prev_t->pulse_at_frame (frame, _frame_rate);
1471 /* treated as constant for this ts */
1472 const double pulses_in_section = (frame - prev_t->frame()) / prev_t->frames_per_pulse (_frame_rate);
1474 return pulses_in_section + prev_t->pulse();
1478 TempoMap::frame_at_pulse (const double& pulse) const
1480 Glib::Threads::RWLock::ReaderLock lm (lock);
1481 return frame_at_pulse_locked (_metrics, pulse);
1484 /* tempo section based */
1486 TempoMap::frame_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1488 /* HOLD THE READER LOCK */
1490 const TempoSection* prev_t = 0;
1492 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1495 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1499 if (prev_t && t->pulse() > pulse) {
1500 return prev_t->frame_at_pulse (pulse, _frame_rate);
1506 /* must be treated as constant, irrespective of _type */
1507 double const pulses_in_section = pulse - prev_t->pulse();
1508 double const dtime = pulses_in_section * prev_t->frames_per_pulse (_frame_rate);
1510 framecnt_t const ret = (framecnt_t) floor (dtime) + prev_t->frame();
1516 TempoMap::beat_at_frame (const framecnt_t& frame) const
1518 Glib::Threads::RWLock::ReaderLock lm (lock);
1519 return beat_at_frame_locked (_metrics, frame);
1522 /* meter / tempo section based */
1524 TempoMap::beat_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
1526 const TempoSection& ts = tempo_section_at_locked (metrics, frame);
1527 MeterSection* prev_m = 0;
1528 MeterSection* next_m = 0;
1530 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1532 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1533 if (prev_m && m->frame() > frame) {
1540 if (frame < prev_m->frame()) {
1543 const double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
1545 if (next_m && next_m->beat() < beat) {
1546 return next_m->beat();
1553 TempoMap::frame_at_beat (const double& beat) const
1555 Glib::Threads::RWLock::ReaderLock lm (lock);
1556 return frame_at_beat_locked (_metrics, beat);
1559 /* meter section based */
1561 TempoMap::frame_at_beat_locked (const Metrics& metrics, const double& beat) const
1563 const TempoSection& prev_t = tempo_section_at_beat_locked (metrics, beat);
1564 MeterSection* prev_m = 0;
1566 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1568 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1569 if (prev_m && m->beat() > beat) {
1576 return prev_t.frame_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse(), _frame_rate);
1580 TempoMap::beat_at_bbt (const Timecode::BBT_Time& bbt)
1582 Glib::Threads::RWLock::ReaderLock lm (lock);
1583 return beat_at_bbt_locked (_metrics, bbt);
1588 TempoMap::beat_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const
1590 /* CALLER HOLDS READ LOCK */
1592 MeterSection* prev_m = 0;
1594 /* because audio-locked meters have 'fake' integral beats,
1595 there is no pulse offset here.
1597 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1599 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1601 const double bars_to_m = (m->beat() - prev_m->beat()) / prev_m->divisions_per_bar();
1602 if ((bars_to_m + (prev_m->bbt().bars - 1)) > (bbt.bars - 1)) {
1610 const double remaining_bars = bbt.bars - prev_m->bbt().bars;
1611 const double remaining_bars_in_beats = remaining_bars * prev_m->divisions_per_bar();
1612 const double ret = remaining_bars_in_beats + prev_m->beat() + (bbt.beats - 1) + (bbt.ticks / BBT_Time::ticks_per_beat);
1618 TempoMap::bbt_at_beat (const double& beats)
1620 Glib::Threads::RWLock::ReaderLock lm (lock);
1621 return bbt_at_beat_locked (_metrics, beats);
1625 TempoMap::bbt_at_beat_locked (const Metrics& metrics, const double& b) const
1627 /* CALLER HOLDS READ LOCK */
1628 MeterSection* prev_m = 0;
1629 const double beats = max (0.0, b);
1631 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1632 MeterSection* m = 0;
1634 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1636 if (m->beat() > beats) {
1637 /* this is the meter after the one our beat is on*/
1646 const double beats_in_ms = beats - prev_m->beat();
1647 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1648 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1649 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1650 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1654 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1655 ret.beats = (uint32_t) floor (remaining_beats);
1656 ret.bars = total_bars;
1658 /* 0 0 0 to 1 1 0 - based mapping*/
1662 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1664 ret.ticks -= BBT_Time::ticks_per_beat;
1667 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1676 TempoMap::pulse_at_bbt (const Timecode::BBT_Time& bbt)
1678 Glib::Threads::RWLock::ReaderLock lm (lock);
1680 return pulse_at_bbt_locked (_metrics, bbt);
1684 TempoMap::pulse_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const
1686 /* CALLER HOLDS READ LOCK */
1688 MeterSection* prev_m = 0;
1690 /* because audio-locked meters have 'fake' integral beats,
1691 there is no pulse offset here.
1693 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1695 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1697 if (m->bbt().bars > bbt.bars) {
1705 const double remaining_bars = bbt.bars - prev_m->bbt().bars;
1706 const double remaining_pulses = remaining_bars * prev_m->divisions_per_bar() / prev_m->note_divisor();
1707 const double ret = remaining_pulses + prev_m->pulse();
1713 TempoMap::bbt_at_pulse (const double& pulse)
1715 Glib::Threads::RWLock::ReaderLock lm (lock);
1717 return bbt_at_pulse_locked (_metrics, pulse);
1721 TempoMap::bbt_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1723 MeterSection* prev_m = 0;
1725 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1726 MeterSection* m = 0;
1728 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1731 double const pulses_to_m = m->pulse() - prev_m->pulse();
1732 if (prev_m->pulse() + pulses_to_m > pulse) {
1733 /* this is the meter after the one our beat is on*/
1742 const double beats_in_ms = (pulse - prev_m->pulse()) * prev_m->note_divisor();
1743 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1744 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1745 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1746 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1750 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1751 ret.beats = (uint32_t) floor (remaining_beats);
1752 ret.bars = total_bars;
1754 /* 0 0 0 to 1 1 0 mapping*/
1758 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1760 ret.ticks -= BBT_Time::ticks_per_beat;
1763 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1772 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt)
1779 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1782 Glib::Threads::RWLock::ReaderLock lm (lock);
1783 const double beat = beat_at_frame_locked (_metrics, frame);
1785 bbt = bbt_at_beat_locked (_metrics, beat);
1789 TempoMap::frame_time (const BBT_Time& bbt)
1792 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
1796 if (bbt.beats < 1) {
1797 throw std::logic_error ("beats are counted from one");
1799 Glib::Threads::RWLock::ReaderLock lm (lock);
1801 return frame_time_locked (_metrics, bbt);
1804 /* meter section based */
1806 TempoMap::frame_time_locked (const Metrics& metrics, const BBT_Time& bbt) const
1808 /* HOLD THE READER LOCK */
1810 const framepos_t ret = frame_at_beat_locked (metrics, beat_at_bbt_locked (metrics, bbt));
1815 TempoMap::check_solved (const Metrics& metrics) const
1817 TempoSection* prev_t = 0;
1818 MeterSection* prev_m = 0;
1820 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1823 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1828 if ((t->frame() <= prev_t->frame()) || (t->pulse() <= prev_t->pulse())) {
1832 /* precision check ensures pulses and frames align.*/
1833 if (t->frame() != prev_t->frame_at_pulse (t->pulse(), _frame_rate)) {
1834 if (!t->locked_to_meter()) {
1842 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1843 if (prev_m && m->position_lock_style() == AudioTime) {
1844 TempoSection* t = const_cast<TempoSection*>(&tempo_section_at_locked (metrics, m->frame() - 1));
1845 const double nascent_m_pulse = ((m->beat() - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse();
1846 const framepos_t nascent_m_frame = t->frame_at_pulse (nascent_m_pulse, _frame_rate);
1848 if (t && (nascent_m_frame > m->frame() || nascent_m_frame < 0)) {
1862 TempoMap::set_active_tempos (const Metrics& metrics, const framepos_t& frame)
1864 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1866 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1867 if (!t->movable()) {
1868 t->set_active (true);
1871 if (t->movable() && t->active () && t->position_lock_style() == AudioTime && t->frame() < frame) {
1872 t->set_active (false);
1874 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() > frame) {
1875 t->set_active (true);
1876 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() == frame) {
1885 TempoMap::solve_map_frame (Metrics& imaginary, TempoSection* section, const framepos_t& frame)
1887 TempoSection* prev_t = 0;
1888 TempoSection* section_prev = 0;
1889 framepos_t first_m_frame = 0;
1891 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
1893 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
1894 if (!m->movable()) {
1895 first_m_frame = m->frame();
1900 if (section->movable() && frame <= first_m_frame) {
1904 section->set_active (true);
1905 section->set_frame (frame);
1907 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
1909 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1916 section_prev = prev_t;
1919 if (t->position_lock_style() == MusicTime) {
1920 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1921 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
1923 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1924 if (!t->locked_to_meter()) {
1925 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
1934 section_prev->set_c_func (section_prev->compute_c_func_frame (section->pulses_per_minute(), frame, _frame_rate));
1935 if (!section->locked_to_meter()) {
1936 section->set_pulse (section_prev->pulse_at_frame (frame, _frame_rate));
1940 recompute_tempos (imaginary);
1942 if (check_solved (imaginary)) {
1946 MetricSectionFrameSorter fcmp;
1947 imaginary.sort (fcmp);
1949 recompute_tempos (imaginary);
1951 if (check_solved (imaginary)) {
1959 TempoMap::solve_map_pulse (Metrics& imaginary, TempoSection* section, const double& pulse)
1961 TempoSection* prev_t = 0;
1962 TempoSection* section_prev = 0;
1964 section->set_pulse (pulse);
1966 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
1968 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1972 if (!t->movable()) {
1979 section_prev = prev_t;
1982 if (t->position_lock_style() == MusicTime) {
1983 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1984 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
1986 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1987 if (!t->locked_to_meter()) {
1988 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
1997 section_prev->set_c_func (section_prev->compute_c_func_pulse (section->pulses_per_minute(), pulse, _frame_rate));
1998 section->set_frame (section_prev->frame_at_pulse (pulse, _frame_rate));
2001 recompute_tempos (imaginary);
2003 if (check_solved (imaginary)) {
2007 MetricSectionSorter cmp;
2008 imaginary.sort (cmp);
2010 recompute_tempos (imaginary);
2012 * XX need a restriction here, but only for this case,
2013 * as audio locked tempos don't interact in the same way.
2015 * With music-locked tempos, the solution to cross-dragging can fly off the screen
2017 * |50 bpm |250 bpm |60 bpm
2018 * drag 250 to the pulse after 60->
2019 * a clue: dragging the second 60 <- past the 250 would cause no such problem.
2021 if (check_solved (imaginary)) {
2029 TempoMap::solve_map_frame (Metrics& imaginary, MeterSection* section, const framepos_t& frame)
2031 /* disallow moving first meter past any subsequent one, and any movable meter before the first one */
2032 const MeterSection* other = &meter_section_at_locked (imaginary, frame);
2033 if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->frame() >= frame)) {
2037 if (!section->movable()) {
2038 /* lock the first tempo to our first meter */
2039 if (!set_active_tempos (imaginary, frame)) {
2044 /* it would make sense to bail out if there is no audio-locked meter,
2045 however it may be desirable to move a music-locked meter by frame at some point.
2047 TempoSection* meter_locked_tempo = 0;
2048 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2050 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
2051 if ((t->locked_to_meter() || !t->movable()) && t->frame() == section->frame()) {
2052 meter_locked_tempo = t;
2058 if (!meter_locked_tempo) {
2062 MeterSection* prev_m = 0;
2064 TempoSection* tempo_copy = copy_metrics_and_point (imaginary, future_map, meter_locked_tempo);
2065 bool solved = false;
2067 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2069 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2071 if (prev_m && section->movable()) {
2072 const double beats = (pulse_at_frame_locked (imaginary, frame) - prev_m->pulse()) * prev_m->note_divisor();
2073 if (beats + prev_m->beat() < section->beat()) {
2074 /* set the frame/pulse corresponding to its musical position,
2075 * as an earlier time than this has been requested.
2077 const double new_pulse = ((section->beat() - prev_m->beat())
2078 / prev_m->note_divisor()) + prev_m->pulse();
2080 const framepos_t smallest_frame = frame_at_pulse_locked (future_map, new_pulse);
2082 if ((solved = solve_map_frame (future_map, tempo_copy, smallest_frame))) {
2083 meter_locked_tempo->set_pulse (new_pulse);
2084 solve_map_frame (imaginary, meter_locked_tempo, smallest_frame);
2085 section->set_frame (smallest_frame);
2086 section->set_pulse (new_pulse);
2091 Metrics::const_iterator d = future_map.begin();
2092 while (d != future_map.end()) {
2101 /* all is ok. set section's tempo */
2102 MeterSection* meter_copy = const_cast<MeterSection*> (&meter_section_at_locked (future_map, section->frame()));
2103 meter_copy->set_frame (frame);
2105 if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
2106 section->set_frame (frame);
2107 meter_locked_tempo->set_pulse (((section->beat() - prev_m->beat())
2108 / prev_m->note_divisor()) + prev_m->pulse());
2109 solve_map_frame (imaginary, meter_locked_tempo, frame);
2114 Metrics::const_iterator d = future_map.begin();
2115 while (d != future_map.end()) {
2125 /* not movable (first meter atm) */
2127 tempo_copy->set_frame (frame);
2128 tempo_copy->set_pulse (0.0);
2130 if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
2131 section->set_frame (frame);
2132 meter_locked_tempo->set_frame (frame);
2133 meter_locked_tempo->set_pulse (0.0);
2134 solve_map_frame (imaginary, meter_locked_tempo, frame);
2139 Metrics::const_iterator d = future_map.begin();
2140 while (d != future_map.end()) {
2149 pair<double, BBT_Time> b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2150 section->set_beat (b_bbt);
2151 section->set_pulse (0.0);
2161 MetricSectionFrameSorter fcmp;
2162 imaginary.sort (fcmp);
2164 recompute_meters (imaginary);
2170 TempoMap::solve_map_bbt (Metrics& imaginary, MeterSection* section, const BBT_Time& when)
2172 /* disallow setting section to an existing meter's bbt */
2173 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2175 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2176 if (m != section && m->bbt().bars == when.bars) {
2182 MeterSection* prev_m = 0;
2183 MeterSection* section_prev = 0;
2185 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2187 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2188 pair<double, BBT_Time> b_bbt;
2189 double new_pulse = 0.0;
2191 if (prev_m && m->bbt().bars > when.bars && !section_prev){
2192 section_prev = prev_m;
2193 const double beats = (when.bars - section_prev->bbt().bars) * section_prev->divisions_per_bar();
2194 const double pulse = (beats / section_prev->note_divisor()) + section_prev->pulse();
2195 pair<double, BBT_Time> b_bbt = make_pair (beats + section_prev->beat(), when);
2197 section->set_beat (b_bbt);
2198 section->set_pulse (pulse);
2199 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2204 if (m->position_lock_style() == AudioTime) {
2205 TempoSection* meter_locked_tempo = 0;
2207 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2209 if ((t = dynamic_cast<TempoSection*> (*ii)) != 0) {
2210 if ((t->locked_to_meter() || !t->movable()) && t->frame() == m->frame()) {
2211 meter_locked_tempo = t;
2217 if (!meter_locked_tempo) {
2222 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2224 if (beats + prev_m->beat() != m->beat()) {
2225 /* tempo/ meter change caused a change in beat (bar). */
2226 b_bbt = make_pair (beats + prev_m->beat()
2227 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2228 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2229 } else if (m->movable()) {
2230 b_bbt = make_pair (m->beat(), m->bbt());
2231 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2234 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2237 meter_locked_tempo->set_pulse (new_pulse);
2238 m->set_beat (b_bbt);
2239 m->set_pulse (new_pulse);
2243 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2244 if (beats + prev_m->beat() != m->beat()) {
2245 /* tempo/ meter change caused a change in beat (bar). */
2246 b_bbt = make_pair (beats + prev_m->beat()
2247 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2249 b_bbt = make_pair (beats + prev_m->beat()
2252 new_pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2253 m->set_beat (b_bbt);
2254 m->set_pulse (new_pulse);
2255 m->set_frame (frame_at_pulse_locked (imaginary, new_pulse));
2262 if (!section_prev) {
2264 const double beats = (when.bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
2265 const double pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2266 pair<double, BBT_Time> b_bbt = make_pair (beats + prev_m->beat(), when);
2268 section->set_beat (b_bbt);
2269 section->set_pulse (pulse);
2270 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2273 MetricSectionSorter cmp;
2274 imaginary.sort (cmp);
2276 recompute_meters (imaginary);
2281 /** places a copy of _metrics into copy and returns a pointer
2282 * to section's equivalent in copy.
2285 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, TempoSection* section)
2287 TempoSection* ret = 0;
2289 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2292 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2294 ret = new TempoSection (*t);
2295 copy.push_back (ret);
2299 TempoSection* cp = new TempoSection (*t);
2300 copy.push_back (cp);
2302 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
2303 MeterSection* cp = new MeterSection (*m);
2304 copy.push_back (cp);
2312 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, MeterSection* section)
2314 MeterSection* ret = 0;
2316 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2319 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2320 TempoSection* cp = new TempoSection (*t);
2321 copy.push_back (cp);
2324 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
2326 ret = new MeterSection (*m);
2327 copy.push_back (ret);
2330 MeterSection* cp = new MeterSection (*m);
2331 copy.push_back (cp);
2339 TempoMap::can_solve_bbt (TempoSection* ts, const BBT_Time& bbt)
2342 TempoSection* tempo_copy = 0;
2345 Glib::Threads::RWLock::ReaderLock lm (lock);
2346 tempo_copy = copy_metrics_and_point (_metrics, copy, ts);
2352 const bool ret = solve_map_pulse (copy, tempo_copy, pulse_at_bbt_locked (copy, bbt));
2354 Metrics::const_iterator d = copy.begin();
2355 while (d != copy.end()) {
2364 * This is for a gui that needs to know the pulse or frame of a tempo section if it were to be moved to some bbt time,
2365 * taking any possible reordering as a consequence of this into account.
2366 * @param section - the section to be altered
2367 * @param bbt - the bbt where the altered tempo will fall
2368 * @return returns - the position in pulses and frames (as a pair) where the new tempo section will lie.
2370 pair<double, framepos_t>
2371 TempoMap::predict_tempo_position (TempoSection* section, const BBT_Time& bbt)
2374 pair<double, framepos_t> ret = make_pair (0.0, 0);
2376 Glib::Threads::RWLock::ReaderLock lm (lock);
2378 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, section);
2380 const double beat = beat_at_bbt_locked (future_map, bbt);
2382 if (solve_map_pulse (future_map, tempo_copy, pulse_at_beat_locked (future_map, beat))) {
2383 ret.first = tempo_copy->pulse();
2384 ret.second = tempo_copy->frame();
2386 ret.first = section->pulse();
2387 ret.second = section->frame();
2390 Metrics::const_iterator d = future_map.begin();
2391 while (d != future_map.end()) {
2399 TempoMap::gui_move_tempo (TempoSection* ts, const framepos_t& frame)
2403 if (ts->position_lock_style() == MusicTime) {
2405 Glib::Threads::RWLock::WriterLock lm (lock);
2406 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2407 const double pulse = pulse_at_frame_locked (future_map, frame);
2408 if (solve_map_pulse (future_map, tempo_copy, pulse)) {
2409 solve_map_pulse (_metrics, ts, pulse);
2410 recompute_meters (_metrics);
2417 Glib::Threads::RWLock::WriterLock lm (lock);
2418 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2419 if (solve_map_frame (future_map, tempo_copy, frame)) {
2420 solve_map_frame (_metrics, ts, frame);
2421 recompute_meters (_metrics);
2426 Metrics::const_iterator d = future_map.begin();
2427 while (d != future_map.end()) {
2432 MetricPositionChanged (); // Emit Signal
2436 TempoMap::gui_move_meter (MeterSection* ms, const framepos_t& frame)
2440 if (ms->position_lock_style() == AudioTime) {
2443 Glib::Threads::RWLock::WriterLock lm (lock);
2444 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2446 if (solve_map_frame (future_map, copy, frame)) {
2447 solve_map_frame (_metrics, ms, frame);
2448 recompute_tempos (_metrics);
2453 Glib::Threads::RWLock::WriterLock lm (lock);
2454 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2456 const double beat = beat_at_frame_locked (_metrics, frame);
2457 const Timecode::BBT_Time bbt = bbt_at_beat_locked (_metrics, beat);
2459 if (solve_map_bbt (future_map, copy, bbt)) {
2460 solve_map_bbt (_metrics, ms, bbt);
2461 recompute_tempos (_metrics);
2466 Metrics::const_iterator d = future_map.begin();
2467 while (d != future_map.end()) {
2472 MetricPositionChanged (); // Emit Signal
2476 TempoMap::gui_change_tempo (TempoSection* ts, const Tempo& bpm)
2479 bool can_solve = false;
2481 Glib::Threads::RWLock::WriterLock lm (lock);
2482 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2483 tempo_copy->set_beats_per_minute (bpm.beats_per_minute());
2484 recompute_tempos (future_map);
2486 if (check_solved (future_map)) {
2487 ts->set_beats_per_minute (bpm.beats_per_minute());
2488 recompute_map (_metrics);
2493 Metrics::const_iterator d = future_map.begin();
2494 while (d != future_map.end()) {
2499 MetricPositionChanged (); // Emit Signal
2505 TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame, const double& pulse)
2508 Ts (future prev_t) Tnext
2511 |----------|----------
2518 Glib::Threads::RWLock::WriterLock lm (lock);
2524 TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
2525 TempoSection* prev_to_prev_t = 0;
2526 const frameoffset_t fr_off = end_frame - frame;
2528 if (prev_t && prev_t->pulse() > 0.0) {
2529 prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, prev_t->frame() - 1));
2532 TempoSection* next_t = 0;
2533 for (Metrics::iterator i = future_map.begin(); i != future_map.end(); ++i) {
2534 TempoSection* t = 0;
2535 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2536 if (t->frame() > ts->frame()) {
2543 /* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
2544 constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
2546 double contribution = 0.0;
2547 double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
2549 if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2550 contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
2553 frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
2554 double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
2557 if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
2559 if (prev_t->position_lock_style() == MusicTime) {
2560 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2562 new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
2563 / (double) ((frame + prev_t_frame_contribution) - prev_to_prev_t->frame()));
2566 /* prev to prev is irrelevant */
2568 if (start_pulse != prev_t->pulse()) {
2569 new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
2571 new_bpm = prev_t->beats_per_minute();
2576 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2577 new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
2578 / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
2580 /* prev_to_prev_t is irrelevant */
2582 if (end_frame != prev_t->frame()) {
2583 new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
2585 new_bpm = prev_t->beats_per_minute();
2593 const framepos_t pulse_pos = prev_t->frame_at_pulse (pulse, _frame_rate);
2595 if (prev_to_prev_t) {
2597 frame_ratio = (((pulse_pos - fr_off) - prev_to_prev_t->frame()) / (double) ((pulse_pos) - prev_to_prev_t->frame()));
2598 pulse_ratio = ((start_pulse - prev_to_prev_t->pulse()) / (end_pulse - prev_to_prev_t->pulse()));
2601 frame_ratio = (((pulse_pos - fr_off) - prev_t->frame()) / (double) ((pulse_pos) - prev_t->frame()));
2602 pulse_ratio = (start_pulse / end_pulse);
2604 new_bpm = prev_t->beats_per_minute() * (pulse_ratio * frame_ratio);
2607 prev_t->set_beats_per_minute (new_bpm);
2608 recompute_tempos (future_map);
2609 recompute_meters (future_map);
2611 if (check_solved (future_map)) {
2612 ts->set_beats_per_minute (new_bpm);
2613 recompute_tempos (_metrics);
2614 recompute_meters (_metrics);
2618 Metrics::const_iterator d = future_map.begin();
2619 while (d != future_map.end()) {
2624 MetricPositionChanged (); // Emit Signal
2628 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
2630 Glib::Threads::RWLock::ReaderLock lm (lock);
2632 const double tick_at_time = beat_at_frame_locked (_metrics, pos) * BBT_Time::ticks_per_beat;
2633 const double bbt_ticks = bbt.ticks + (bbt.beats * BBT_Time::ticks_per_beat);
2634 const double total_beats = (tick_at_time + bbt_ticks) / BBT_Time::ticks_per_beat;
2636 return frame_at_beat_locked (_metrics, total_beats);
2640 TempoMap::round_to_bar (framepos_t fr, RoundMode dir)
2642 return round_to_type (fr, dir, Bar);
2646 TempoMap::round_to_beat (framepos_t fr, RoundMode dir)
2648 return round_to_type (fr, dir, Beat);
2652 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, RoundMode dir)
2654 Glib::Threads::RWLock::ReaderLock lm (lock);
2655 uint32_t ticks = (uint32_t) floor (beat_at_frame_locked (_metrics, fr) * BBT_Time::ticks_per_beat);
2656 uint32_t beats = (uint32_t) floor (ticks / BBT_Time::ticks_per_beat);
2657 uint32_t ticks_one_subdivisions_worth = (uint32_t) BBT_Time::ticks_per_beat / sub_num;
2659 ticks -= beats * BBT_Time::ticks_per_beat;
2662 /* round to next (or same iff dir == RoundUpMaybe) */
2664 uint32_t mod = ticks % ticks_one_subdivisions_worth;
2666 if (mod == 0 && dir == RoundUpMaybe) {
2667 /* right on the subdivision, which is fine, so do nothing */
2669 } else if (mod == 0) {
2670 /* right on the subdivision, so the difference is just the subdivision ticks */
2671 ticks += ticks_one_subdivisions_worth;
2674 /* not on subdivision, compute distance to next subdivision */
2676 ticks += ticks_one_subdivisions_worth - mod;
2679 if (ticks >= BBT_Time::ticks_per_beat) {
2680 ticks -= BBT_Time::ticks_per_beat;
2682 } else if (dir < 0) {
2684 /* round to previous (or same iff dir == RoundDownMaybe) */
2686 uint32_t difference = ticks % ticks_one_subdivisions_worth;
2688 if (difference == 0 && dir == RoundDownAlways) {
2689 /* right on the subdivision, but force-rounding down,
2690 so the difference is just the subdivision ticks */
2691 difference = ticks_one_subdivisions_worth;
2694 if (ticks < difference) {
2695 ticks = BBT_Time::ticks_per_beat - ticks;
2697 ticks -= difference;
2701 /* round to nearest */
2704 /* compute the distance to the previous and next subdivision */
2706 if ((rem = fmod ((double) ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
2708 /* closer to the next subdivision, so shift forward */
2710 ticks = lrint (ticks + (ticks_one_subdivisions_worth - rem));
2712 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", ticks));
2714 if (ticks > BBT_Time::ticks_per_beat) {
2716 ticks -= BBT_Time::ticks_per_beat;
2717 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", beats));
2720 } else if (rem > 0) {
2722 /* closer to previous subdivision, so shift backward */
2726 /* can't go backwards past zero, so ... */
2729 /* step back to previous beat */
2731 ticks = lrint (BBT_Time::ticks_per_beat - rem);
2732 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", beats));
2734 ticks = lrint (ticks - rem);
2735 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", ticks));
2738 /* on the subdivision, do nothing */
2742 const framepos_t ret_frame = frame_at_beat_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat));
2748 TempoMap::round_to_type (framepos_t frame, RoundMode dir, BBTPointType type)
2750 Glib::Threads::RWLock::ReaderLock lm (lock);
2752 const double beat_at_framepos = beat_at_frame_locked (_metrics, frame);
2753 BBT_Time bbt (bbt_at_beat_locked (_metrics, beat_at_framepos));
2758 /* find bar previous to 'frame' */
2761 return frame_time_locked (_metrics, bbt);
2763 } else if (dir > 0) {
2764 /* find bar following 'frame' */
2768 return frame_time_locked (_metrics, bbt);
2770 /* true rounding: find nearest bar */
2771 framepos_t raw_ft = frame_time_locked (_metrics, bbt);
2774 framepos_t prev_ft = frame_time_locked (_metrics, bbt);
2776 framepos_t next_ft = frame_time_locked (_metrics, bbt);
2778 if ((raw_ft - prev_ft) > (next_ft - prev_ft) / 2) {
2789 return frame_at_beat_locked (_metrics, floor (beat_at_framepos));
2790 } else if (dir > 0) {
2791 return frame_at_beat_locked (_metrics, ceil (beat_at_framepos));
2793 return frame_at_beat_locked (_metrics, floor (beat_at_framepos + 0.5));
2802 TempoMap::get_grid (vector<TempoMap::BBTPoint>& points,
2803 framepos_t lower, framepos_t upper)
2805 Glib::Threads::RWLock::ReaderLock lm (lock);
2806 int32_t cnt = ceil (beat_at_frame_locked (_metrics, lower));
2808 /* although the map handles negative beats, bbt doesn't. */
2812 while (pos < upper) {
2813 pos = frame_at_beat_locked (_metrics, cnt);
2814 const TempoSection tempo = tempo_section_at_locked (_metrics, pos);
2815 const MeterSection meter = meter_section_at_locked (_metrics, pos);
2816 const BBT_Time bbt = bbt_at_beat_locked (_metrics, cnt);
2817 points.push_back (BBTPoint (meter, tempo_at_locked (_metrics, pos), pos, bbt.bars, bbt.beats, tempo.c_func()));
2823 TempoMap::tempo_section_at (framepos_t frame) const
2825 Glib::Threads::RWLock::ReaderLock lm (lock);
2826 return tempo_section_at_locked (_metrics, frame);
2830 TempoMap::tempo_section_at_locked (const Metrics& metrics, framepos_t frame) const
2832 Metrics::const_iterator i;
2833 TempoSection* prev = 0;
2835 for (i = metrics.begin(); i != metrics.end(); ++i) {
2838 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2842 if (prev && t->frame() > frame) {
2852 abort(); /*NOTREACHED*/
2859 TempoMap::tempo_section_at_beat_locked (const Metrics& metrics, const double& beat) const
2861 TempoSection* prev_t = 0;
2862 const MeterSection* prev_m = &meter_section_at_beat_locked (metrics, beat);
2864 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2866 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2867 if (prev_t && ((t->pulse() - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > beat) {
2878 TempoMap::tempo_section_at_pulse_locked (const Metrics& metrics, const double& pulse) const
2880 TempoSection* prev_t = 0;
2882 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2884 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2885 if (prev_t && t->pulse() > pulse) {
2895 /* don't use this to calculate length (the tempo is only correct for this frame).
2896 do that stuff based on the beat_at_frame and frame_at_beat api
2899 TempoMap::frames_per_beat_at (const framepos_t& frame, const framecnt_t& sr) const
2901 Glib::Threads::RWLock::ReaderLock lm (lock);
2903 const TempoSection* ts_at = &tempo_section_at_locked (_metrics, frame);
2904 const TempoSection* ts_after = 0;
2905 Metrics::const_iterator i;
2907 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
2910 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2914 if ((*i)->frame() > frame) {
2922 return (60.0 * _frame_rate) / (ts_at->tempo_at_frame (frame, _frame_rate));
2924 /* must be treated as constant tempo */
2925 return ts_at->frames_per_beat (_frame_rate);
2929 TempoMap::tempo_at_locked (const Metrics& metrics, const framepos_t& frame) const
2931 TempoSection* prev_t = 0;
2933 Metrics::const_iterator i;
2935 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
2937 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
2941 if ((prev_t) && t->frame() > frame) {
2942 /* t is the section past frame */
2943 const double ret_bpm = prev_t->tempo_at_frame (frame, _frame_rate) * prev_t->note_type();
2944 const Tempo ret_tempo (ret_bpm, prev_t->note_type());
2951 const double ret = prev_t->beats_per_minute();
2952 const Tempo ret_tempo (ret, prev_t->note_type ());
2958 TempoMap::tempo_at (const framepos_t& frame) const
2960 Glib::Threads::RWLock::ReaderLock lm (lock);
2961 return tempo_at_locked (_metrics, frame);
2965 TempoMap::meter_section_at_locked (const Metrics& metrics, framepos_t frame) const
2967 Metrics::const_iterator i;
2968 MeterSection* prev = 0;
2970 for (i = metrics.begin(); i != metrics.end(); ++i) {
2973 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
2975 if (prev && (*i)->frame() > frame) {
2985 abort(); /*NOTREACHED*/
2993 TempoMap::meter_section_at (framepos_t frame) const
2995 Glib::Threads::RWLock::ReaderLock lm (lock);
2996 return meter_section_at_locked (_metrics, frame);
3000 TempoMap::meter_section_at_beat_locked (const Metrics& metrics, const double& beat) const
3002 MeterSection* prev_m = 0;
3004 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3006 if ((m = dynamic_cast<MeterSection*> (*i)) != 0) {
3007 if (prev_m && m->beat() > beat) {
3018 TempoMap::meter_section_at_beat (double beat) const
3020 Glib::Threads::RWLock::ReaderLock lm (lock);
3021 return meter_section_at_beat_locked (_metrics, beat);
3025 TempoMap::meter_at (framepos_t frame) const
3027 TempoMetric m (metric_at (frame));
3032 TempoMap::fix_legacy_session ()
3034 MeterSection* prev_m = 0;
3035 TempoSection* prev_t = 0;
3037 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3041 if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3042 if (!m->movable()) {
3043 pair<double, BBT_Time> bbt = make_pair (0.0, BBT_Time (1, 1, 0));
3047 m->set_position_lock_style (AudioTime);
3052 pair<double, BBT_Time> start = make_pair (((m->bbt().bars - 1) * prev_m->note_divisor())
3053 + (m->bbt().beats - 1)
3054 + (m->bbt().ticks / BBT_Time::ticks_per_beat)
3056 m->set_beat (start);
3057 const double start_beat = ((m->bbt().bars - 1) * prev_m->note_divisor())
3058 + (m->bbt().beats - 1)
3059 + (m->bbt().ticks / BBT_Time::ticks_per_beat);
3060 m->set_pulse (start_beat / prev_m->note_divisor());
3063 } else if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3069 if (!t->movable()) {
3072 t->set_position_lock_style (AudioTime);
3078 const double beat = ((t->legacy_bbt().bars - 1) * ((prev_m) ? prev_m->note_divisor() : 4.0))
3079 + (t->legacy_bbt().beats - 1)
3080 + (t->legacy_bbt().ticks / BBT_Time::ticks_per_beat);
3082 t->set_pulse (beat / prev_m->note_divisor());
3084 /* really shouldn't happen but.. */
3085 t->set_pulse (beat / 4.0);
3094 TempoMap::get_state ()
3096 Metrics::const_iterator i;
3097 XMLNode *root = new XMLNode ("TempoMap");
3100 Glib::Threads::RWLock::ReaderLock lm (lock);
3101 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3102 root->add_child_nocopy ((*i)->get_state());
3110 TempoMap::set_state (const XMLNode& node, int /*version*/)
3113 Glib::Threads::RWLock::WriterLock lm (lock);
3116 XMLNodeConstIterator niter;
3117 Metrics old_metrics (_metrics);
3120 nlist = node.children();
3122 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
3123 XMLNode* child = *niter;
3125 if (child->name() == TempoSection::xml_state_node_name) {
3128 TempoSection* ts = new TempoSection (*child);
3129 _metrics.push_back (ts);
3132 catch (failed_constructor& err){
3133 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3134 _metrics = old_metrics;
3138 } else if (child->name() == MeterSection::xml_state_node_name) {
3141 MeterSection* ms = new MeterSection (*child);
3142 _metrics.push_back (ms);
3145 catch (failed_constructor& err) {
3146 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3147 _metrics = old_metrics;
3153 if (niter == nlist.end()) {
3154 MetricSectionSorter cmp;
3155 _metrics.sort (cmp);
3158 /* check for legacy sessions where bbt was the base musical unit for tempo */
3159 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3161 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3162 if (t->legacy_bbt().bars != 0) {
3163 fix_legacy_session();
3170 /* check for multiple tempo/meters at the same location, which
3171 ardour2 somehow allowed.
3174 Metrics::iterator prev = _metrics.end();
3175 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3176 if (prev != _metrics.end()) {
3178 MeterSection* prev_m;
3180 TempoSection* prev_t;
3181 if ((prev_m = dynamic_cast<MeterSection*>(*prev)) != 0 && (ms = dynamic_cast<MeterSection*>(*i)) != 0) {
3182 if (prev_m->pulse() == ms->pulse()) {
3183 cerr << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3184 error << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3187 } else if ((prev_t = dynamic_cast<TempoSection*>(*prev)) != 0 && (ts = dynamic_cast<TempoSection*>(*i)) != 0) {
3188 if (prev_t->pulse() == ts->pulse()) {
3189 cerr << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3190 error << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3198 recompute_map (_metrics);
3201 PropertyChanged (PropertyChange ());
3207 TempoMap::dump (const Metrics& metrics, std::ostream& o) const
3209 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
3210 const MeterSection* m;
3211 const TempoSection* t;
3212 const TempoSection* prev_t = 0;
3214 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3216 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
3217 o << "Tempo @ " << *i << t->beats_per_minute() << " BPM (pulse = 1/" << t->note_type() << ") at " << t->pulse() << " frame= " << t->frame() << " (movable? "
3218 << t->movable() << ')' << " pos lock: " << enum_2_string (t->position_lock_style()) << std::endl;
3219 o << "current : " << t->beats_per_minute() << " | " << t->pulse() << " | " << t->frame() << std::endl;
3221 o << "previous : " << prev_t->beats_per_minute() << " | " << prev_t->pulse() << " | " << prev_t->frame() << std::endl;
3222 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;
3225 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
3226 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->bbt() << " frame= " << m->frame()
3227 << " pulse: " << m->pulse() << " beat : " << m->beat() << " pos lock: " << enum_2_string (m->position_lock_style()) << " (movable? " << m->movable() << ')' << endl;
3230 o << "------" << std::endl;
3234 TempoMap::n_tempos() const
3236 Glib::Threads::RWLock::ReaderLock lm (lock);
3239 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3240 if (dynamic_cast<const TempoSection*>(*i) != 0) {
3249 TempoMap::n_meters() const
3251 Glib::Threads::RWLock::ReaderLock lm (lock);
3254 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3255 if (dynamic_cast<const MeterSection*>(*i) != 0) {
3264 TempoMap::insert_time (framepos_t where, framecnt_t amount)
3267 Glib::Threads::RWLock::WriterLock lm (lock);
3268 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3269 if ((*i)->frame() >= where && (*i)->movable ()) {
3270 (*i)->set_frame ((*i)->frame() + amount);
3274 /* now reset the BBT time of all metrics, based on their new
3275 * audio time. This is the only place where we do this reverse
3279 Metrics::iterator i;
3280 const MeterSection* meter;
3281 const TempoSection* tempo;
3285 meter = &first_meter ();
3286 tempo = &first_tempo ();
3291 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
3294 MetricSection* prev = 0;
3296 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3299 //TempoMetric metric (*meter, *tempo);
3300 MeterSection* ms = const_cast<MeterSection*>(meter);
3301 TempoSection* ts = const_cast<TempoSection*>(tempo);
3304 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3308 ts->set_pulse (t->pulse());
3310 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3311 ts->set_pulse (m->pulse());
3313 ts->set_frame (prev->frame());
3317 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3318 pair<double, BBT_Time> start = make_pair (m->beat(), m->bbt());
3319 ms->set_beat (start);
3320 ms->set_pulse (m->pulse());
3322 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3326 const double beat = beat_at_pulse_locked (_metrics, t->pulse());
3327 pair<double, BBT_Time> start = make_pair (beat, bbt_at_beat_locked (_metrics, beat));
3328 ms->set_beat (start);
3329 ms->set_pulse (t->pulse());
3331 ms->set_frame (prev->frame());
3335 // metric will be at frames=0 bbt=1|1|0 by default
3336 // which is correct for our purpose
3339 // cerr << bbt << endl;
3341 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3345 t->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3347 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3348 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3349 bbt_time (m->frame(), bbt);
3351 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
3357 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
3358 /* round up to next beat */
3364 if (bbt.beats != 1) {
3365 /* round up to next bar */
3370 pair<double, BBT_Time> start = make_pair (beat_at_frame_locked (_metrics, m->frame()), bbt);
3371 m->set_beat (start);
3372 m->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3374 // cerr << "NEW METER, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3376 fatal << _("programming error: unhandled MetricSection type") << endmsg;
3377 abort(); /*NOTREACHED*/
3383 recompute_map (_metrics);
3387 PropertyChanged (PropertyChange ());
3390 TempoMap::remove_time (framepos_t where, framecnt_t amount)
3394 std::list<MetricSection*> metric_kill_list;
3396 TempoSection* last_tempo = NULL;
3397 MeterSection* last_meter = NULL;
3398 bool tempo_after = false; // is there a tempo marker at the first sample after the removed range?
3399 bool meter_after = false; // is there a meter marker likewise?
3401 Glib::Threads::RWLock::WriterLock lm (lock);
3402 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3403 if ((*i)->frame() >= where && (*i)->frame() < where+amount) {
3404 metric_kill_list.push_back(*i);
3405 TempoSection *lt = dynamic_cast<TempoSection*> (*i);
3408 MeterSection *lm = dynamic_cast<MeterSection*> (*i);
3412 else if ((*i)->frame() >= where) {
3413 // TODO: make sure that moved tempo/meter markers are rounded to beat/bar boundaries
3414 (*i)->set_frame ((*i)->frame() - amount);
3415 if ((*i)->frame() == where) {
3416 // marker was immediately after end of range
3417 tempo_after = dynamic_cast<TempoSection*> (*i);
3418 meter_after = dynamic_cast<MeterSection*> (*i);
3424 //find the last TEMPO and METER metric (if any) and move it to the cut point so future stuff is correct
3425 if (last_tempo && !tempo_after) {
3426 metric_kill_list.remove(last_tempo);
3427 last_tempo->set_frame(where);
3430 if (last_meter && !meter_after) {
3431 metric_kill_list.remove(last_meter);
3432 last_meter->set_frame(where);
3436 //remove all the remaining metrics
3437 for (std::list<MetricSection*>::iterator i = metric_kill_list.begin(); i != metric_kill_list.end(); ++i) {
3438 _metrics.remove(*i);
3443 recompute_map (_metrics);
3446 PropertyChanged (PropertyChange ());
3450 /** Add some (fractional) beats to a session frame position, and return the result in frames.
3451 * pos can be -ve, if required.
3454 TempoMap::framepos_plus_beats (framepos_t pos, Evoral::Beats beats) const
3456 return frame_at_beat (beat_at_frame (pos) + beats.to_double());
3459 /** Subtract some (fractional) beats from a frame position, and return the result in frames */
3461 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::Beats beats) const
3463 return frame_at_beat (beat_at_frame (pos) - beats.to_double());
3466 /** Add the BBT interval op to pos and return the result */
3468 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
3470 Glib::Threads::RWLock::ReaderLock lm (lock);
3472 BBT_Time pos_bbt = bbt_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, pos));
3473 pos_bbt.ticks += op.ticks;
3474 if (pos_bbt.ticks >= BBT_Time::ticks_per_beat) {
3476 pos_bbt.ticks -= BBT_Time::ticks_per_beat;
3478 pos_bbt.beats += op.beats;
3479 /* the meter in effect will start on the bar */
3480 double divisions_per_bar = meter_section_at_beat (beat_at_bbt_locked (_metrics, BBT_Time (pos_bbt.bars + op.bars, 1, 0))).divisions_per_bar();
3481 while (pos_bbt.beats >= divisions_per_bar + 1) {
3483 divisions_per_bar = meter_section_at_beat (beat_at_bbt_locked (_metrics, BBT_Time (pos_bbt.bars + op.bars, 1, 0))).divisions_per_bar();
3484 pos_bbt.beats -= divisions_per_bar;
3486 pos_bbt.bars += op.bars;
3488 return frame_time_locked (_metrics, pos_bbt);
3491 /** Count the number of beats that are equivalent to distance when going forward,
3495 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
3497 return Evoral::Beats (beat_at_frame (pos + distance) - beat_at_frame (pos));
3501 bool operator() (const BBT_Time& a, const BBT_Time& b) {
3507 operator<< (std::ostream& o, const Meter& m) {
3508 return o << m.divisions_per_bar() << '/' << m.note_divisor();
3512 operator<< (std::ostream& o, const Tempo& t) {
3513 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
3517 operator<< (std::ostream& o, const MetricSection& section) {
3519 o << "MetricSection @ " << section.frame() << ' ';
3521 const TempoSection* ts;
3522 const MeterSection* ms;
3524 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
3525 o << *((const Tempo*) ts);
3526 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
3527 o << *((const Meter*) ms);