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, true)
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), "%lf", 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), "%lf", _beats_per_minute);
187 root->add_property ("beats-per-minute", buf);
188 snprintf (buf, sizeof (buf), "%lf", _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 pulse p 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& p, const framecnt_t& frame_rate) const
228 if (_type == Constant || _c_func == 0.0) {
229 return ((p - 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, false), 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), "%lf", _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), "%lf", _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 The Shaggs - Things I Wonder
590 https://www.youtube.com/watch?v=9wQK6zMJOoQ
592 Tempo is the rate of the musical pulse.
593 Meters divide the pulses into measures and beats.
595 TempoSections - provide pulses in the form of beats_per_minute() and note_type() where note_type is the division of a whole pulse,
596 and beats_per_minute is the number of note_types in one minute (unlike what its name suggests).
597 Note that Tempo::beats_per_minute() has nothing to do with musical beats. It has been left that way because
598 a shorter one hasn't been found yet (pulse_divisions_per_minute()?).
600 MeterSecions - divide pulses into measures (via divisions_per_bar) and beats (via note_divisor).
602 Both tempos and meters have a pulse position and a frame position.
603 Meters also have a beat position, which is always 0.0 for the first meter.
604 TempoSections and MeterSections may be locked to either audio or music (position lock style).
605 The lock style determines the 'true' position of the section wich is used to calculate the other postion parameters of the section.
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 With tepo sections potentially being ramped, meters provide a way of mapping beats to whole pulses without
612 referring to the tempo function(s) involved as the distance in whole pulses between a meter and a subsequent beat is
613 sb->beat() - meter->beat() / meter->note_divisor().
614 Because every meter falls on a known pulse, (derived from its bar), the rest is easy as the duration in pulses between
615 two meters is of course
616 (meater_b->bar - meter_a->bar) * meter_a->divisions_per_bar / meter_a->note_divisor.
618 Below, beat calculations are based on meter sections and all pulse and tempo calculations are based on tempo sections.
619 Beat to frame conversion of course requires the use of meter and tempo.
621 Remembering that ramped tempo sections interact, it is important to avoid referring to any other tempos when moving tempo sections,
622 Here, beats (meters) are used to determine the new pulse (see predict_tempo_position())
624 Recomputing the map is the process where the 'missing' position
625 (tempo pulse or meter pulse & beat in the case of AudioTime, frame for MusicTime) is calculated.
626 We construct the tempo map by first using the frame or pulse position (depending on position lock style) of each tempo.
627 We then use this tempo map (really just the tempos) to find the pulse or frame position of each meter (again depending on lock style).
629 Having done this, we can now find any musical duration by selecting the tempo and meter covering the position (or tempo) in question
630 and querying its appropriate meter/tempo.
632 It is important to keep the _metrics in an order that makes sense.
633 Because ramped MusicTime and AudioTime tempos can interact with each other,
634 reordering is frequent. Care must be taken to keep _metrics in a solved state.
635 Solved means ordered by frame or pulse with frame-accurate precision (see check_solved()).
639 Music and audio-locked objects may seem interchangeable on the surface, but when translating
640 between audio samples and beats, keep in mind that a sample is only a quantised approximation
641 of the actual time (in minutes) of a beat.
642 Thus if a gui user points to the frame occupying the start of a music-locked object on 1|3|0, it does not
643 mean that this frame is the actual location in time of 1|3|0.
645 You cannot use a frame measurement to determine beat distance except under special circumstances
646 (e.g. where the user has requested that a beat lie on a SMPTE frame or if the tempo is known to be constant over the duration).
648 This means is that a user operating on a musical grid must supply the desired beat position and/or current beat quantization in order for the
649 sample space the user is operating at to be translated correctly to the object.
651 The current approach is to interpret the supplied frame using the grid division the user has currently selected.
652 If the user has no musical grid set, they are actually operating in sample space (even SMPTE frames are rounded to audio frame), so
653 the supplied audio frame is interpreted as the desired musical location (beat_at_frame()).
655 tldr: Beat, being a function of time, has nothing to do with sample rate, but time quantization can get in the way of precision.
657 When frame_at_beat() is called, the position calculation is performed in pulses and minutes.
658 The result is rounded to audio frames.
659 When beat_at_frame() is called, the frame is converted to minutes, with no rounding performed on the result.
662 frame_at_beat (beat_at_frame (frame)) == frame
664 beat_at_frame (frame_at_beat (beat)) != beat due to the time quantization of frame_at_beat().
666 Doing the second one will result in a beat distance error of up to 0.5 audio samples.
667 So instead work in pulses and/or beats and only use beat position to caclulate frame position (e.g. after tempo change).
668 For audio-locked objects, use frame position to calculate beat position.
670 The above pointless example would then do:
671 beat_at_pulse (pulse_at_beat (beat)) to avoid rounding.
674 struct MetricSectionSorter {
675 bool operator() (const MetricSection* a, const MetricSection* b) {
676 return a->pulse() < b->pulse();
680 struct MetricSectionFrameSorter {
681 bool operator() (const MetricSection* a, const MetricSection* b) {
682 return a->frame() < b->frame();
686 TempoMap::TempoMap (framecnt_t fr)
689 BBT_Time start (1, 1, 0);
691 TempoSection *t = new TempoSection (0.0, 0, _default_tempo.beats_per_minute(), _default_tempo.note_type(), TempoSection::Ramp, AudioTime);
692 MeterSection *m = new MeterSection (0.0, 0, 0.0, start, _default_meter.divisions_per_bar(), _default_meter.note_divisor(), AudioTime);
694 t->set_movable (false);
695 m->set_movable (false);
697 /* note: frame time is correct (zero) for both of these */
699 _metrics.push_back (t);
700 _metrics.push_back (m);
704 TempoMap::~TempoMap ()
706 Metrics::const_iterator d = _metrics.begin();
707 while (d != _metrics.end()) {
715 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
717 bool removed = false;
720 Glib::Threads::RWLock::WriterLock lm (lock);
721 if ((removed = remove_tempo_locked (tempo))) {
722 if (complete_operation) {
723 recompute_map (_metrics);
728 if (removed && complete_operation) {
729 PropertyChanged (PropertyChange ());
734 TempoMap::remove_tempo_locked (const TempoSection& tempo)
738 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
739 if (dynamic_cast<TempoSection*> (*i) != 0) {
740 if (tempo.frame() == (*i)->frame()) {
741 if ((*i)->movable()) {
754 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
756 bool removed = false;
759 Glib::Threads::RWLock::WriterLock lm (lock);
760 if ((removed = remove_meter_locked (tempo))) {
761 if (complete_operation) {
762 recompute_map (_metrics);
767 if (removed && complete_operation) {
768 PropertyChanged (PropertyChange ());
773 TempoMap::remove_meter_locked (const MeterSection& meter)
776 if (meter.position_lock_style() == AudioTime) {
777 /* remove meter-locked tempo */
778 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
780 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
781 if (t->locked_to_meter() && meter.frame() == (*i)->frame()) {
790 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
791 if (dynamic_cast<MeterSection*> (*i) != 0) {
792 if (meter.frame() == (*i)->frame()) {
793 if ((*i)->movable()) {
806 TempoMap::do_insert (MetricSection* section)
808 bool need_add = true;
809 /* we only allow new meters to be inserted on beat 1 of an existing
813 if ((m = dynamic_cast<MeterSection*>(section)) != 0) {
815 if ((m->bbt().beats != 1) || (m->bbt().ticks != 0)) {
817 pair<double, BBT_Time> corrected = make_pair (m->beat(), m->bbt());
818 corrected.second.beats = 1;
819 corrected.second.ticks = 0;
820 corrected.first = beat_at_bbt_locked (_metrics, corrected.second);
821 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
822 m->bbt(), corrected.second) << endmsg;
823 //m->set_pulse (corrected);
827 /* Look for any existing MetricSection that is of the same type and
828 in the same bar as the new one, and remove it before adding
829 the new one. Note that this means that if we find a matching,
830 existing section, we can break out of the loop since we're
831 guaranteed that there is only one such match.
834 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
836 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
837 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
838 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
839 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
841 if (tempo && insert_tempo) {
844 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
845 if ((ipm && tempo->pulse() == insert_tempo->pulse()) || (!ipm && tempo->frame() == insert_tempo->frame())) {
847 if (!tempo->movable()) {
849 /* can't (re)move this section, so overwrite
850 * its data content (but not its properties as
854 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(insert_tempo));
855 (*i)->set_position_lock_style (AudioTime);
857 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
858 t->set_type (insert_tempo->type());
868 } else if (meter && insert_meter) {
872 bool const ipm = insert_meter->position_lock_style() == MusicTime;
874 if ((ipm && meter->beat() == insert_meter->beat()) || (!ipm && meter->frame() == insert_meter->frame())) {
876 if (!meter->movable()) {
878 /* can't (re)move this section, so overwrite
879 * its data content (but not its properties as
883 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(insert_meter));
884 (*i)->set_position_lock_style (AudioTime);
894 /* non-matching types, so we don't care */
898 /* Add the given MetricSection, if we didn't just reset an existing
903 MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
904 TempoSection* const insert_tempo = dynamic_cast<TempoSection*> (section);
907 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
908 MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
911 bool const ipm = insert_meter->position_lock_style() == MusicTime;
912 if ((ipm && meter->beat() > insert_meter->beat()) || (!ipm && meter->frame() > insert_meter->frame())) {
917 } else if (insert_tempo) {
918 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
919 TempoSection* const tempo = dynamic_cast<TempoSection*> (*i);
922 bool const ipm = insert_tempo->position_lock_style() == MusicTime;
923 if ((ipm && tempo->pulse() > insert_tempo->pulse()) || (!ipm && tempo->frame() > insert_tempo->frame())) {
930 _metrics.insert (i, section);
931 //dump (_metrics, std::cout);
936 TempoMap::add_tempo (const Tempo& tempo, const double& pulse, const framepos_t& frame, ARDOUR::TempoSection::Type type, PositionLockStyle pls)
938 TempoSection* ts = 0;
940 Glib::Threads::RWLock::WriterLock lm (lock);
941 ts = add_tempo_locked (tempo, pulse, frame, type, pls, true);
945 PropertyChanged (PropertyChange ());
951 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const double& pulse, const framepos_t& frame, TempoSection::Type type, PositionLockStyle pls)
953 const bool locked_to_meter = ts.locked_to_meter();
956 Glib::Threads::RWLock::WriterLock lm (lock);
957 TempoSection& first (first_tempo());
958 if (ts.frame() != first.frame()) {
959 remove_tempo_locked (ts);
960 add_tempo_locked (tempo, pulse, frame, type, pls, true, locked_to_meter);
962 first.set_type (type);
963 first.set_pulse (0.0);
964 first.set_frame (frame);
965 first.set_position_lock_style (AudioTime);
967 /* cannot move the first tempo section */
968 *static_cast<Tempo*>(&first) = tempo;
969 recompute_map (_metrics);
974 PropertyChanged (PropertyChange ());
978 TempoMap::add_tempo_locked (const Tempo& tempo, double pulse, framepos_t frame
979 , TempoSection::Type type, PositionLockStyle pls, bool recompute, bool locked_to_meter)
981 TempoSection* t = new TempoSection (pulse, frame, tempo.beats_per_minute(), tempo.note_type(), type, pls);
982 t->set_locked_to_meter (locked_to_meter);
988 if (pls == AudioTime) {
989 solved = solve_map_frame (_metrics, t, t->frame());
991 solved = solve_map_pulse (_metrics, t, t->pulse());
993 recompute_meters (_metrics);
996 if (!solved && recompute) {
997 recompute_map (_metrics);
1004 TempoMap::add_meter (const Meter& meter, const double& beat, const Timecode::BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
1006 MeterSection* m = 0;
1008 Glib::Threads::RWLock::WriterLock lm (lock);
1009 m = add_meter_locked (meter, beat, where, frame, pls, true);
1014 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
1015 dump (_metrics, std::cerr);
1019 PropertyChanged (PropertyChange ());
1024 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
1027 Glib::Threads::RWLock::WriterLock lm (lock);
1028 const double beat = beat_at_bbt_locked (_metrics, where);
1031 remove_meter_locked (ms);
1032 add_meter_locked (meter, beat, where, frame, pls, true);
1034 MeterSection& first (first_meter());
1035 TempoSection& first_t (first_tempo());
1036 /* cannot move the first meter section */
1037 *static_cast<Meter*>(&first) = meter;
1038 first.set_position_lock_style (AudioTime);
1039 first.set_pulse (0.0);
1040 first.set_frame (frame);
1041 pair<double, BBT_Time> beat = make_pair (0.0, BBT_Time (1, 1, 0));
1042 first.set_beat (beat);
1043 first_t.set_frame (first.frame());
1044 first_t.set_pulse (0.0);
1045 first_t.set_position_lock_style (AudioTime);
1046 recompute_map (_metrics);
1050 PropertyChanged (PropertyChange ());
1054 TempoMap::add_meter_locked (const Meter& meter, double beat, const BBT_Time& where, framepos_t frame, PositionLockStyle pls, bool recompute)
1056 const MeterSection& prev_m = meter_section_at_frame_locked (_metrics, frame - 1);
1057 const double pulse = ((where.bars - prev_m.bbt().bars) * (prev_m.divisions_per_bar() / prev_m.note_divisor())) + prev_m.pulse();
1058 TempoSection* mlt = 0;
1060 if (pls == AudioTime) {
1061 /* add meter-locked tempo */
1062 mlt = add_tempo_locked (tempo_at_frame_locked (_metrics, frame), pulse, frame, TempoSection::Ramp, AudioTime, true, true);
1070 MeterSection* new_meter = new MeterSection (pulse, frame, beat, where, meter.divisions_per_bar(), meter.note_divisor(), pls);
1071 bool solved = false;
1073 do_insert (new_meter);
1077 if (pls == AudioTime) {
1078 solved = solve_map_frame (_metrics, new_meter, frame);
1080 solved = solve_map_bbt (_metrics, new_meter, where);
1081 /* required due to resetting the pulse of meter-locked tempi above.
1082 Arguably solve_map_bbt() should use solve_map_pulse (_metrics, TempoSection) instead,
1083 but afaict this cannot cause the map to be left unsolved (these tempi are all audio locked).
1085 recompute_map (_metrics);
1089 if (!solved && recompute) {
1090 /* if this has failed to solve, there is little we can do other than to ensure that
1091 the new map is recalculated.
1093 warning << "Adding meter may have left the tempo map unsolved." << endmsg;
1094 recompute_map (_metrics);
1101 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
1103 Tempo newtempo (beats_per_minute, note_type);
1106 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1107 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1112 Glib::Threads::RWLock::WriterLock lm (lock);
1113 *((Tempo*) t) = newtempo;
1114 recompute_map (_metrics);
1116 PropertyChanged (PropertyChange ());
1123 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
1125 Tempo newtempo (beats_per_minute, note_type);
1128 TempoSection* first;
1129 Metrics::iterator i;
1131 /* find the TempoSection immediately preceding "where"
1134 for (first = 0, i = _metrics.begin(), prev = 0; i != _metrics.end(); ++i) {
1136 if ((*i)->frame() > where) {
1142 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1155 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
1165 Glib::Threads::RWLock::WriterLock lm (lock);
1166 /* cannot move the first tempo section */
1167 *((Tempo*)prev) = newtempo;
1168 recompute_map (_metrics);
1171 PropertyChanged (PropertyChange ());
1175 TempoMap::first_meter () const
1177 const MeterSection *m = 0;
1179 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1180 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
1185 fatal << _("programming error: no meter section in tempo map!") << endmsg;
1186 abort(); /*NOTREACHED*/
1191 TempoMap::first_meter ()
1193 MeterSection *m = 0;
1195 /* CALLER MUST HOLD LOCK */
1197 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1198 if ((m = dynamic_cast<MeterSection *> (*i)) != 0) {
1203 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1204 abort(); /*NOTREACHED*/
1209 TempoMap::first_tempo () const
1211 const TempoSection *t = 0;
1213 /* CALLER MUST HOLD LOCK */
1215 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1216 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
1220 if (!t->movable()) {
1226 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1227 abort(); /*NOTREACHED*/
1232 TempoMap::first_tempo ()
1234 TempoSection *t = 0;
1236 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1237 if ((t = dynamic_cast<TempoSection *> (*i)) != 0) {
1241 if (!t->movable()) {
1247 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
1248 abort(); /*NOTREACHED*/
1252 TempoMap::recompute_tempi (Metrics& metrics)
1254 TempoSection* prev_t = 0;
1256 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1259 if ((*i)->is_tempo()) {
1260 t = static_cast<TempoSection*> (*i);
1264 if (!t->movable()) {
1272 if (t->position_lock_style() == AudioTime) {
1273 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
1274 if (!t->locked_to_meter()) {
1275 t->set_pulse (prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate));
1279 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
1280 t->set_frame (prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate));
1287 prev_t->set_c_func (0.0);
1290 /* tempos must be positioned correctly.
1291 the current approach is to use a meter's bbt time as its base position unit.
1292 an audio-locked meter requires a recomputation of pulse and beat (but not bbt),
1293 while a music-locked meter requires recomputations of frame pulse and beat (but not bbt)
1296 TempoMap::recompute_meters (Metrics& metrics)
1298 MeterSection* meter = 0;
1299 MeterSection* prev_m = 0;
1301 for (Metrics::const_iterator mi = metrics.begin(); mi != metrics.end(); ++mi) {
1302 if (!(*mi)->is_tempo()) {
1303 meter = static_cast<MeterSection*> (*mi);
1304 if (meter->position_lock_style() == AudioTime) {
1306 pair<double, BBT_Time> b_bbt;
1307 TempoSection* meter_locked_tempo = 0;
1308 for (Metrics::const_iterator ii = metrics.begin(); ii != metrics.end(); ++ii) {
1310 if ((*ii)->is_tempo()) {
1311 t = static_cast<TempoSection*> (*ii);
1312 if ((t->locked_to_meter() || !t->movable()) && t->frame() == meter->frame()) {
1313 meter_locked_tempo = t;
1320 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1321 if (beats + prev_m->beat() != meter->beat()) {
1322 /* reordering caused a bbt change */
1323 b_bbt = make_pair (beats + prev_m->beat()
1324 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1325 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1327 } else if (meter->movable()) {
1328 b_bbt = make_pair (meter->beat(), meter->bbt());
1329 pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
1332 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
1334 if (meter_locked_tempo) {
1335 meter_locked_tempo->set_pulse (pulse);
1337 meter->set_beat (b_bbt);
1338 meter->set_pulse (pulse);
1343 pair<double, BBT_Time> b_bbt;
1345 const double beats = (meter->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
1346 if (beats + prev_m->beat() != meter->beat()) {
1347 /* reordering caused a bbt change */
1348 b_bbt = make_pair (beats + prev_m->beat()
1349 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
1351 b_bbt = make_pair (beats + prev_m->beat(), meter->bbt());
1353 pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
1355 /* shouldn't happen - the first is audio-locked */
1356 pulse = pulse_at_beat_locked (metrics, meter->beat());
1357 b_bbt = make_pair (meter->beat(), meter->bbt());
1360 meter->set_beat (b_bbt);
1361 meter->set_pulse (pulse);
1362 meter->set_frame (frame_at_pulse_locked (metrics, pulse));
1371 TempoMap::recompute_map (Metrics& metrics, framepos_t end)
1373 /* CALLER MUST HOLD WRITE LOCK */
1377 /* we will actually stop once we hit
1384 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
1387 /* silly call from Session::process() during startup
1392 recompute_tempi (metrics);
1393 recompute_meters (metrics);
1397 TempoMap::metric_at (framepos_t frame, Metrics::const_iterator* last) const
1399 Glib::Threads::RWLock::ReaderLock lm (lock);
1400 TempoMetric m (first_meter(), first_tempo());
1402 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1403 at something, because we insert the default tempo and meter during
1404 TempoMap construction.
1406 now see if we can find better candidates.
1409 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1411 if ((*i)->frame() > frame) {
1425 /* XX meters only */
1427 TempoMap::metric_at (BBT_Time bbt) const
1429 Glib::Threads::RWLock::ReaderLock lm (lock);
1430 TempoMetric m (first_meter(), first_tempo());
1432 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1433 at something, because we insert the default tempo and meter during
1434 TempoMap construction.
1436 now see if we can find better candidates.
1439 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1441 if (!(*i)->is_tempo()) {
1442 mw = static_cast<MeterSection*> (*i);
1443 BBT_Time section_start (mw->bbt());
1445 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1456 /** Returns the beat duration corresponding to the supplied frame, possibly returning a negative value.
1457 * @param frame The session frame position.
1458 * @return The beat duration according to the tempo map at the supplied frame.
1459 * If the supplied frame lies before the first meter, the returned beat duration will be negative.
1460 * The returned beat is obtained using the first meter and the continuation of the tempo curve (backwards).
1462 * This function uses both tempo and meter.
1465 TempoMap::beat_at_frame (const framecnt_t& frame) const
1467 Glib::Threads::RWLock::ReaderLock lm (lock);
1468 return beat_at_frame_locked (_metrics, frame);
1471 /* This function uses both tempo and meter.*/
1473 TempoMap::beat_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
1475 const TempoSection& ts = tempo_section_at_frame_locked (metrics, frame);
1476 MeterSection* prev_m = 0;
1477 MeterSection* next_m = 0;
1479 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1480 if (!(*i)->is_tempo()) {
1481 if (prev_m && (*i)->frame() > frame) {
1482 next_m = static_cast<MeterSection*> (*i);
1485 prev_m = static_cast<MeterSection*> (*i);
1489 const double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
1491 /* audio locked meters fake their beat */
1492 if (next_m && next_m->beat() < beat) {
1493 return next_m->beat();
1500 TempoMap::frame_at_beat (const double& beat) const
1502 Glib::Threads::RWLock::ReaderLock lm (lock);
1503 return frame_at_beat_locked (_metrics, beat);
1506 /* meter & tempo section based */
1508 TempoMap::frame_at_beat_locked (const Metrics& metrics, const double& beat) const
1510 MeterSection* prev_m = 0;
1511 TempoSection* prev_t = 0;
1515 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1516 if (!(*i)->is_tempo()) {
1517 m = static_cast<MeterSection*> (*i);
1518 if (prev_m && m->beat() > beat) {
1527 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1528 if ((*i)->is_tempo()) {
1529 t = static_cast<TempoSection*> (*i);
1530 if (prev_t && ((t->pulse() - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > beat) {
1538 return prev_t->frame_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse(), _frame_rate);
1542 TempoMap::tempo_at_frame (const framepos_t& frame) const
1544 Glib::Threads::RWLock::ReaderLock lm (lock);
1545 return tempo_at_frame_locked (_metrics, frame);
1549 TempoMap::tempo_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
1551 TempoSection* prev_t = 0;
1555 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
1556 if ((*i)->is_tempo()) {
1557 t = static_cast<TempoSection*> (*i);
1561 if ((prev_t) && t->frame() > frame) {
1562 /* t is the section past frame */
1563 const double ret_bpm = prev_t->tempo_at_frame (frame, _frame_rate) * prev_t->note_type();
1564 const Tempo ret_tempo (ret_bpm, prev_t->note_type());
1571 const double ret = prev_t->beats_per_minute();
1572 const Tempo ret_tempo (ret, prev_t->note_type ());
1577 /** returns the frame at which the supplied tempo occurs, or
1578 * the frame of the last tempo section (search exhausted)
1579 * only the position of the first occurence will be returned
1583 TempoMap::frame_at_tempo (const Tempo& tempo) const
1585 Glib::Threads::RWLock::ReaderLock lm (lock);
1586 return frame_at_tempo_locked (_metrics, tempo);
1591 TempoMap::frame_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const
1593 TempoSection* prev_t = 0;
1594 const double tempo_ppm = tempo.beats_per_minute() / tempo.note_type();
1596 Metrics::const_iterator i;
1598 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
1600 if ((*i)->is_tempo()) {
1601 t = static_cast<TempoSection*> (*i);
1607 const double t_ppm = t->beats_per_minute() / t->note_type();
1609 if (t_ppm == tempo_ppm) {
1614 const double prev_t_ppm = prev_t->beats_per_minute() / prev_t->note_type();
1616 if ((t_ppm > tempo_ppm && prev_t_ppm < tempo_ppm) || (t_ppm < tempo_ppm && prev_t_ppm > tempo_ppm)) {
1617 return prev_t->frame_at_tempo (tempo_ppm, prev_t->pulse(), _frame_rate);
1624 return prev_t->frame();
1627 /** more precise than doing tempo_at_frame (frame_at_beat (b)),
1628 * as there is no intermediate frame rounding.
1631 TempoMap::tempo_at_beat (const double& beat) const
1633 Glib::Threads::RWLock::ReaderLock lm (lock);
1634 const MeterSection* prev_m = &meter_section_at_beat_locked (_metrics, beat);
1635 const TempoSection* prev_t = &tempo_section_at_beat_locked (_metrics, beat);
1636 const double note_type = prev_t->note_type();
1638 return Tempo (prev_t->tempo_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse()) * note_type, note_type);
1642 TempoMap::pulse_at_beat (const double& beat) const
1644 Glib::Threads::RWLock::ReaderLock lm (lock);
1645 return pulse_at_beat_locked (_metrics, beat);
1649 TempoMap::pulse_at_beat_locked (const Metrics& metrics, const double& beat) const
1651 const MeterSection* prev_m = &meter_section_at_beat_locked (metrics, beat);
1653 return prev_m->pulse() + ((beat - prev_m->beat()) / prev_m->note_divisor());
1657 TempoMap::beat_at_pulse (const double& pulse) const
1659 Glib::Threads::RWLock::ReaderLock lm (lock);
1660 return beat_at_pulse_locked (_metrics, pulse);
1664 TempoMap::beat_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1666 MeterSection* prev_m = 0;
1668 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1670 if (!(*i)->is_tempo()) {
1671 m = static_cast<MeterSection*> (*i);
1672 if (prev_m && m->pulse() > pulse) {
1673 if (((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > m->beat()) {
1681 double const ret = ((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat();
1686 TempoMap::pulse_at_frame (const framepos_t& frame) const
1688 Glib::Threads::RWLock::ReaderLock lm (lock);
1689 return pulse_at_frame_locked (_metrics, frame);
1692 /* tempo section based */
1694 TempoMap::pulse_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
1696 /* HOLD (at least) THE READER LOCK */
1697 TempoSection* prev_t = 0;
1699 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1701 if ((*i)->is_tempo()) {
1702 t = static_cast<TempoSection*> (*i);
1706 if (prev_t && t->frame() > frame) {
1707 /*the previous ts is the one containing the frame */
1708 const double ret = prev_t->pulse_at_frame (frame, _frame_rate);
1715 /* treated as constant for this ts */
1716 const double pulses_in_section = (frame - prev_t->frame()) / prev_t->frames_per_pulse (_frame_rate);
1718 return pulses_in_section + prev_t->pulse();
1722 TempoMap::frame_at_pulse (const double& pulse) const
1724 Glib::Threads::RWLock::ReaderLock lm (lock);
1725 return frame_at_pulse_locked (_metrics, pulse);
1728 /* tempo section based */
1730 TempoMap::frame_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1732 /* HOLD THE READER LOCK */
1734 const TempoSection* prev_t = 0;
1736 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1739 if ((*i)->is_tempo()) {
1740 t = static_cast<TempoSection*> (*i);
1744 if (prev_t && t->pulse() > pulse) {
1745 return prev_t->frame_at_pulse (pulse, _frame_rate);
1751 /* must be treated as constant, irrespective of _type */
1752 double const dtime = (pulse - prev_t->pulse()) * prev_t->frames_per_pulse (_frame_rate);
1754 return (framecnt_t) floor (dtime) + prev_t->frame();
1758 TempoMap::beat_at_bbt (const Timecode::BBT_Time& bbt)
1760 Glib::Threads::RWLock::ReaderLock lm (lock);
1761 return beat_at_bbt_locked (_metrics, bbt);
1766 TempoMap::beat_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const
1768 /* CALLER HOLDS READ LOCK */
1770 MeterSection* prev_m = 0;
1772 /* because audio-locked meters have 'fake' integral beats,
1773 there is no pulse offset here.
1777 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1778 if (!(*i)->is_tempo()) {
1779 m = static_cast<MeterSection*> (*i);
1781 const double bars_to_m = (m->beat() - prev_m->beat()) / prev_m->divisions_per_bar();
1782 if ((bars_to_m + (prev_m->bbt().bars - 1)) > (bbt.bars - 1)) {
1790 const double remaining_bars = bbt.bars - prev_m->bbt().bars;
1791 const double remaining_bars_in_beats = remaining_bars * prev_m->divisions_per_bar();
1792 const double ret = remaining_bars_in_beats + prev_m->beat() + (bbt.beats - 1) + (bbt.ticks / BBT_Time::ticks_per_beat);
1798 TempoMap::bbt_at_beat (const double& beats)
1800 Glib::Threads::RWLock::ReaderLock lm (lock);
1801 return bbt_at_beat_locked (_metrics, beats);
1805 TempoMap::bbt_at_beat_locked (const Metrics& metrics, const double& b) const
1807 /* CALLER HOLDS READ LOCK */
1808 MeterSection* prev_m = 0;
1809 const double beats = max (0.0, b);
1811 MeterSection* m = 0;
1813 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1814 if (!(*i)->is_tempo()) {
1815 m = static_cast<MeterSection*> (*i);
1817 if (m->beat() > beats) {
1818 /* this is the meter after the one our beat is on*/
1827 const double beats_in_ms = beats - prev_m->beat();
1828 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1829 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1830 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1831 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1835 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1836 ret.beats = (uint32_t) floor (remaining_beats);
1837 ret.bars = total_bars;
1839 /* 0 0 0 to 1 1 0 - based mapping*/
1843 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1845 ret.ticks -= BBT_Time::ticks_per_beat;
1848 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1857 TempoMap::pulse_at_bbt (const Timecode::BBT_Time& bbt)
1859 Glib::Threads::RWLock::ReaderLock lm (lock);
1861 return pulse_at_bbt_locked (_metrics, bbt);
1865 TempoMap::pulse_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const
1867 /* CALLER HOLDS READ LOCK */
1869 MeterSection* prev_m = 0;
1871 /* because audio-locked meters have 'fake' integral beats,
1872 there is no pulse offset here.
1876 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1877 if (!(*i)->is_tempo()) {
1878 m = static_cast<MeterSection*> (*i);
1880 if (m->bbt().bars > bbt.bars) {
1888 const double remaining_bars = bbt.bars - prev_m->bbt().bars;
1889 const double remaining_pulses = remaining_bars * prev_m->divisions_per_bar() / prev_m->note_divisor();
1890 const double ret = remaining_pulses + prev_m->pulse() + (((bbt.beats - 1) + (bbt.ticks / BBT_Time::ticks_per_beat)) / prev_m->note_divisor());
1896 TempoMap::bbt_at_pulse (const double& pulse)
1898 Glib::Threads::RWLock::ReaderLock lm (lock);
1900 return bbt_at_pulse_locked (_metrics, pulse);
1904 TempoMap::bbt_at_pulse_locked (const Metrics& metrics, const double& pulse) const
1906 MeterSection* prev_m = 0;
1908 MeterSection* m = 0;
1910 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1912 if (!(*i)->is_tempo()) {
1913 m = static_cast<MeterSection*> (*i);
1916 double const pulses_to_m = m->pulse() - prev_m->pulse();
1917 if (prev_m->pulse() + pulses_to_m > pulse) {
1918 /* this is the meter after the one our beat is on*/
1927 const double beats_in_ms = (pulse - prev_m->pulse()) * prev_m->note_divisor();
1928 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
1929 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
1930 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
1931 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
1935 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
1936 ret.beats = (uint32_t) floor (remaining_beats);
1937 ret.bars = total_bars;
1939 /* 0 0 0 to 1 1 0 mapping*/
1943 if (ret.ticks >= BBT_Time::ticks_per_beat) {
1945 ret.ticks -= BBT_Time::ticks_per_beat;
1948 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
1957 TempoMap::bbt_at_frame (framepos_t frame)
1964 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1967 Glib::Threads::RWLock::ReaderLock lm (lock);
1969 return bbt_at_frame_locked (_metrics, frame);
1973 TempoMap::bbt_at_frame_rt (framepos_t frame)
1975 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
1978 throw std::logic_error ("TempoMap::bbt_time_rt() could not lock tempo map");
1981 return bbt_at_frame_locked (_metrics, frame);
1985 TempoMap::bbt_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
1995 const TempoSection& ts = tempo_section_at_frame_locked (metrics, frame);
1996 MeterSection* prev_m = 0;
1997 MeterSection* next_m = 0;
2001 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2002 if (!(*i)->is_tempo()) {
2003 m = static_cast<MeterSection*> (*i);
2004 if (prev_m && m->frame() > frame) {
2012 double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
2014 /* handle frame before first meter */
2015 if (frame < prev_m->frame()) {
2018 /* audio locked meters fake their beat */
2019 if (next_m && next_m->beat() < beat) {
2020 beat = next_m->beat();
2023 beat = max (0.0, beat);
2025 const double beats_in_ms = beat - prev_m->beat();
2026 const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
2027 const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
2028 const double remaining_beats = beats_in_ms - (bars_in_ms * prev_m->divisions_per_bar());
2029 const double remaining_ticks = (remaining_beats - floor (remaining_beats)) * BBT_Time::ticks_per_beat;
2033 ret.ticks = (uint32_t) floor (remaining_ticks + 0.5);
2034 ret.beats = (uint32_t) floor (remaining_beats);
2035 ret.bars = total_bars;
2037 /* 0 0 0 to 1 1 0 - based mapping*/
2041 if (ret.ticks >= BBT_Time::ticks_per_beat) {
2043 ret.ticks -= BBT_Time::ticks_per_beat;
2046 if (ret.beats >= prev_m->divisions_per_bar() + 1) {
2055 TempoMap::frame_at_bbt (const BBT_Time& bbt)
2058 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
2062 if (bbt.beats < 1) {
2063 throw std::logic_error ("beats are counted from one");
2065 Glib::Threads::RWLock::ReaderLock lm (lock);
2067 return frame_at_bbt_locked (_metrics, bbt);
2070 /* meter & tempo section based */
2072 TempoMap::frame_at_bbt_locked (const Metrics& metrics, const BBT_Time& bbt) const
2074 /* HOLD THE READER LOCK */
2076 const framepos_t ret = frame_at_beat_locked (metrics, beat_at_bbt_locked (metrics, bbt));
2081 TempoMap::check_solved (const Metrics& metrics) const
2083 TempoSection* prev_t = 0;
2084 MeterSection* prev_m = 0;
2086 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2089 if ((*i)->is_tempo()) {
2090 t = static_cast<TempoSection*> (*i);
2095 /* check ordering */
2096 if ((t->frame() <= prev_t->frame()) || (t->pulse() <= prev_t->pulse())) {
2100 /* precision check ensures tempo and frames align.*/
2101 if (t->frame() != prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate)) {
2102 if (!t->locked_to_meter()) {
2107 /* gradient limit - who knows what it should be?
2108 things are also ok (if a little chaotic) without this
2110 if (fabs (prev_t->c_func()) > 1000.0) {
2111 //std::cout << "c : " << prev_t->c_func() << std::endl;
2118 if (!(*i)->is_tempo()) {
2119 m = static_cast<MeterSection*> (*i);
2120 if (prev_m && m->position_lock_style() == AudioTime) {
2121 const TempoSection* t = &tempo_section_at_frame_locked (metrics, m->frame() - 1);
2122 const framepos_t nascent_m_frame = t->frame_at_pulse (m->pulse(), _frame_rate);
2123 /* Here we check that a preceding section of music doesn't overlap a subsequent one.
2124 It is complicated by the fact that audio locked meters represent a discontinuity in the pulse
2125 (they place an exact pulse at a particular time expressed only in frames).
2126 This has the effect of shifting the calculated frame at the meter pulse (wrt the previous section of music)
2127 away from its actual frame (which is now the frame location of the exact pulse).
2128 This can result in the calculated frame (from the previous musical section)
2129 differing from the exact frame by one sample.
2132 if (t && (nascent_m_frame > m->frame() + 1 || nascent_m_frame < 0)) {
2146 TempoMap::set_active_tempos (const Metrics& metrics, const framepos_t& frame)
2148 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2150 if ((*i)->is_tempo()) {
2151 t = static_cast<TempoSection*> (*i);
2152 if (!t->movable()) {
2153 t->set_active (true);
2156 if (t->movable() && t->active () && t->position_lock_style() == AudioTime && t->frame() < frame) {
2157 t->set_active (false);
2159 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() > frame) {
2160 t->set_active (true);
2161 } else if (t->movable() && t->position_lock_style() == AudioTime && t->frame() == frame) {
2170 TempoMap::solve_map_frame (Metrics& imaginary, TempoSection* section, const framepos_t& frame)
2172 TempoSection* prev_t = 0;
2173 TempoSection* section_prev = 0;
2174 framepos_t first_m_frame = 0;
2176 /* can't move a tempo before the first meter */
2177 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2179 if (!(*i)->is_tempo()) {
2180 m = static_cast<MeterSection*> (*i);
2181 if (!m->movable()) {
2182 first_m_frame = m->frame();
2187 if (section->movable() && frame <= first_m_frame) {
2191 section->set_active (true);
2192 section->set_frame (frame);
2194 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2196 if ((*i)->is_tempo()) {
2197 t = static_cast<TempoSection*> (*i);
2204 section_prev = prev_t;
2205 if (t->locked_to_meter()) {
2210 if (t->position_lock_style() == MusicTime) {
2211 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
2212 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
2214 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
2215 if (!t->locked_to_meter()) {
2216 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
2225 section_prev->set_c_func (section_prev->compute_c_func_frame (section->pulses_per_minute(), frame, _frame_rate));
2226 if (!section->locked_to_meter()) {
2227 section->set_pulse (section_prev->pulse_at_frame (frame, _frame_rate));
2232 recompute_tempi (imaginary);
2234 if (check_solved (imaginary)) {
2237 dunp (imaginary, std::cout);
2241 MetricSectionFrameSorter fcmp;
2242 imaginary.sort (fcmp);
2244 recompute_tempi (imaginary);
2246 if (check_solved (imaginary)) {
2254 TempoMap::solve_map_pulse (Metrics& imaginary, TempoSection* section, const double& pulse)
2256 TempoSection* prev_t = 0;
2257 TempoSection* section_prev = 0;
2259 section->set_pulse (pulse);
2261 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2263 if ((*i)->is_tempo()) {
2264 t = static_cast<TempoSection*> (*i);
2268 if (!t->movable()) {
2275 section_prev = prev_t;
2278 if (t->position_lock_style() == MusicTime) {
2279 prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
2280 t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
2282 prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
2283 if (!t->locked_to_meter()) {
2284 t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
2293 section_prev->set_c_func (section_prev->compute_c_func_pulse (section->pulses_per_minute(), pulse, _frame_rate));
2294 section->set_frame (section_prev->frame_at_pulse (pulse, _frame_rate));
2298 recompute_tempi (imaginary);
2300 if (check_solved (imaginary)) {
2303 dunp (imaginary, std::cout);
2307 MetricSectionSorter cmp;
2308 imaginary.sort (cmp);
2310 recompute_tempi (imaginary);
2312 * XX need a restriction here, but only for this case,
2313 * as audio locked tempos don't interact in the same way.
2315 * With music-locked tempos, the solution to cross-dragging can fly off the screen
2317 * |50 bpm |250 bpm |60 bpm
2318 * drag 250 to the pulse after 60->
2319 * a clue: dragging the second 60 <- past the 250 would cause no such problem.
2321 if (check_solved (imaginary)) {
2329 TempoMap::solve_map_frame (Metrics& imaginary, MeterSection* section, const framepos_t& frame)
2331 /* disallow moving first meter past any subsequent one, and any movable meter before the first one */
2332 const MeterSection* other = &meter_section_at_frame_locked (imaginary, frame);
2333 if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->frame() >= frame)) {
2337 if (!section->movable()) {
2338 /* lock the first tempo to our first meter */
2339 if (!set_active_tempos (imaginary, frame)) {
2344 TempoSection* meter_locked_tempo = 0;
2346 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2348 if ((*ii)->is_tempo()) {
2349 t = static_cast<TempoSection*> (*ii);
2350 if ((t->locked_to_meter() || !t->movable()) && t->frame() == section->frame()) {
2351 meter_locked_tempo = t;
2357 if (!meter_locked_tempo) {
2361 MeterSection* prev_m = 0;
2363 TempoSection* tempo_copy = copy_metrics_and_point (imaginary, future_map, meter_locked_tempo);
2364 bool solved = false;
2366 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2368 if (!(*i)->is_tempo()) {
2369 m = static_cast<MeterSection*> (*i);
2371 if (prev_m && section->movable()) {
2372 const double beats = (pulse_at_frame_locked (imaginary, frame) - prev_m->pulse()) * prev_m->note_divisor();
2373 if (beats + prev_m->beat() < section->beat()) {
2374 /* set the frame/pulse corresponding to its musical position,
2375 * as an earlier time than this has been requested.
2377 const double new_pulse = ((section->beat() - prev_m->beat())
2378 / prev_m->note_divisor()) + prev_m->pulse();
2380 const framepos_t smallest_frame = frame_at_pulse_locked (future_map, new_pulse);
2382 if ((solved = solve_map_frame (future_map, tempo_copy, smallest_frame))) {
2383 meter_locked_tempo->set_pulse (new_pulse);
2384 solve_map_frame (imaginary, meter_locked_tempo, smallest_frame);
2385 section->set_frame (smallest_frame);
2386 section->set_pulse (new_pulse);
2391 Metrics::const_iterator d = future_map.begin();
2392 while (d != future_map.end()) {
2401 /* all is ok. set section's locked tempo if allowed.
2402 possibly disallowed if there is an adjacent audio-locked tempo.
2403 XX this check could possibly go. its never actually happened here.
2405 MeterSection* meter_copy = const_cast<MeterSection*> (&meter_section_at_frame_locked (future_map, section->frame()));
2406 meter_copy->set_frame (frame);
2408 if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
2409 section->set_frame (frame);
2410 meter_locked_tempo->set_pulse (((section->beat() - prev_m->beat())
2411 / prev_m->note_divisor()) + prev_m->pulse());
2412 solve_map_frame (imaginary, meter_locked_tempo, frame);
2417 Metrics::const_iterator d = future_map.begin();
2418 while (d != future_map.end()) {
2428 /* not movable (first meter atm) */
2430 tempo_copy->set_frame (frame);
2431 tempo_copy->set_pulse (0.0);
2433 if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
2434 section->set_frame (frame);
2435 meter_locked_tempo->set_frame (frame);
2436 meter_locked_tempo->set_pulse (0.0);
2437 solve_map_frame (imaginary, meter_locked_tempo, frame);
2442 Metrics::const_iterator d = future_map.begin();
2443 while (d != future_map.end()) {
2452 pair<double, BBT_Time> b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2453 section->set_beat (b_bbt);
2454 section->set_pulse (0.0);
2464 MetricSectionFrameSorter fcmp;
2465 imaginary.sort (fcmp);
2467 recompute_meters (imaginary);
2473 TempoMap::solve_map_bbt (Metrics& imaginary, MeterSection* section, const BBT_Time& when)
2475 /* disallow setting section to an existing meter's bbt */
2476 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2478 if (!(*i)->is_tempo()) {
2479 m = static_cast<MeterSection*> (*i);
2480 if (m != section && m->bbt().bars == when.bars) {
2486 MeterSection* prev_m = 0;
2487 MeterSection* section_prev = 0;
2489 for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
2491 if (!(*i)->is_tempo()) {
2492 m = static_cast<MeterSection*> (*i);
2493 pair<double, BBT_Time> b_bbt;
2494 double new_pulse = 0.0;
2496 if (prev_m && m->bbt().bars > when.bars && !section_prev){
2497 section_prev = prev_m;
2498 const double beats = (when.bars - section_prev->bbt().bars) * section_prev->divisions_per_bar();
2499 const double pulse = (beats / section_prev->note_divisor()) + section_prev->pulse();
2500 pair<double, BBT_Time> b_bbt = make_pair (beats + section_prev->beat(), when);
2502 section->set_beat (b_bbt);
2503 section->set_pulse (pulse);
2504 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2509 if (m->position_lock_style() == AudioTime) {
2510 TempoSection* meter_locked_tempo = 0;
2512 for (Metrics::const_iterator ii = imaginary.begin(); ii != imaginary.end(); ++ii) {
2514 if ((*ii)->is_tempo()) {
2515 t = static_cast<TempoSection*> (*ii);
2516 if ((t->locked_to_meter() || !t->movable()) && t->frame() == m->frame()) {
2517 meter_locked_tempo = t;
2523 if (!meter_locked_tempo) {
2528 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2530 if (beats + prev_m->beat() != m->beat()) {
2531 /* tempo/ meter change caused a change in beat (bar). */
2532 b_bbt = make_pair (beats + prev_m->beat()
2533 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2534 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2535 } else if (m->movable()) {
2536 b_bbt = make_pair (m->beat(), m->bbt());
2537 new_pulse = prev_m->pulse() + (beats / prev_m->note_divisor());
2540 b_bbt = make_pair (0.0, BBT_Time (1, 1, 0));
2543 meter_locked_tempo->set_pulse (new_pulse);
2544 m->set_beat (b_bbt);
2545 m->set_pulse (new_pulse);
2549 const double beats = ((m->bbt().bars - prev_m->bbt().bars) * prev_m->divisions_per_bar());
2550 if (beats + prev_m->beat() != m->beat()) {
2551 /* tempo/ meter change caused a change in beat (bar). */
2552 b_bbt = make_pair (beats + prev_m->beat()
2553 , BBT_Time ((beats / prev_m->divisions_per_bar()) + prev_m->bbt().bars, 1, 0));
2555 b_bbt = make_pair (beats + prev_m->beat()
2558 new_pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2559 m->set_beat (b_bbt);
2560 m->set_pulse (new_pulse);
2561 m->set_frame (frame_at_pulse_locked (imaginary, new_pulse));
2568 if (!section_prev) {
2570 const double beats = (when.bars - prev_m->bbt().bars) * prev_m->divisions_per_bar();
2571 const double pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
2572 pair<double, BBT_Time> b_bbt = make_pair (beats + prev_m->beat(), when);
2574 section->set_beat (b_bbt);
2575 section->set_pulse (pulse);
2576 section->set_frame (frame_at_pulse_locked (imaginary, pulse));
2579 MetricSectionSorter cmp;
2580 imaginary.sort (cmp);
2582 recompute_meters (imaginary);
2587 /** places a copy of _metrics into copy and returns a pointer
2588 * to section's equivalent in copy.
2591 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, TempoSection* section)
2593 TempoSection* ret = 0;
2595 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2598 if ((*i)->is_tempo()) {
2599 t = static_cast<TempoSection*> (*i);
2601 ret = new TempoSection (*t);
2602 copy.push_back (ret);
2606 TempoSection* cp = new TempoSection (*t);
2607 copy.push_back (cp);
2609 if (!(*i)->is_tempo()) {
2610 m = static_cast<MeterSection *> (*i);
2611 MeterSection* cp = new MeterSection (*m);
2612 copy.push_back (cp);
2620 TempoMap::copy_metrics_and_point (const Metrics& metrics, Metrics& copy, MeterSection* section)
2622 MeterSection* ret = 0;
2624 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
2627 if ((*i)->is_tempo()) {
2628 t = static_cast<TempoSection*> (*i);
2629 TempoSection* cp = new TempoSection (*t);
2630 copy.push_back (cp);
2633 if (!(*i)->is_tempo()) {
2634 m = static_cast<MeterSection *> (*i);
2636 ret = new MeterSection (*m);
2637 copy.push_back (ret);
2640 MeterSection* cp = new MeterSection (*m);
2641 copy.push_back (cp);
2648 /** answers the question "is this a valid beat position for this tempo section?".
2649 * it returns true if the tempo section can be moved to the requested bbt position,
2650 * leaving the tempo map in a solved state.
2651 * @param section the tempo section to be moved
2652 * @param bbt the requested new position for the tempo section
2653 * @return true if the tempo section can be moved to the position, otherwise false.
2656 TempoMap::can_solve_bbt (TempoSection* ts, const BBT_Time& bbt)
2659 TempoSection* tempo_copy = 0;
2662 Glib::Threads::RWLock::ReaderLock lm (lock);
2663 tempo_copy = copy_metrics_and_point (_metrics, copy, ts);
2669 const bool ret = solve_map_pulse (copy, tempo_copy, pulse_at_bbt_locked (copy, bbt));
2671 Metrics::const_iterator d = copy.begin();
2672 while (d != copy.end()) {
2681 * 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,
2682 * taking any possible reordering as a consequence of this into account.
2683 * @param section - the section to be altered
2684 * @param bbt - the bbt where the altered tempo will fall
2685 * @return returns - the position in pulses and frames (as a pair) where the new tempo section will lie.
2687 pair<double, framepos_t>
2688 TempoMap::predict_tempo_position (TempoSection* section, const BBT_Time& bbt)
2691 pair<double, framepos_t> ret = make_pair (0.0, 0);
2693 Glib::Threads::RWLock::ReaderLock lm (lock);
2695 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, section);
2697 const double beat = beat_at_bbt_locked (future_map, bbt);
2699 if (solve_map_pulse (future_map, tempo_copy, pulse_at_beat_locked (future_map, beat))) {
2700 ret.first = tempo_copy->pulse();
2701 ret.second = tempo_copy->frame();
2703 ret.first = section->pulse();
2704 ret.second = section->frame();
2707 Metrics::const_iterator d = future_map.begin();
2708 while (d != future_map.end()) {
2716 TempoMap::gui_move_tempo (TempoSection* ts, const framepos_t& frame, const int& sub_num)
2719 bool was_musical = ts->position_lock_style() == MusicTime;
2721 if (sub_num == 0 && was_musical) {
2722 /* if we're not snapping to music,
2723 AudioTime and MusicTime may be treated identically.
2725 ts->set_position_lock_style (AudioTime);
2728 if (ts->position_lock_style() == MusicTime) {
2730 /* if we're snapping to a musical grid, set the pulse exactly instead of via the supplied frame. */
2731 Glib::Threads::RWLock::WriterLock lm (lock);
2732 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2733 const double beat = exact_beat_at_frame_locked (future_map, frame, sub_num);
2734 double pulse = pulse_at_beat_locked (future_map, beat);
2736 if (solve_map_pulse (future_map, tempo_copy, pulse)) {
2737 solve_map_pulse (_metrics, ts, pulse);
2738 recompute_meters (_metrics);
2745 Glib::Threads::RWLock::WriterLock lm (lock);
2746 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2747 if (solve_map_frame (future_map, tempo_copy, frame)) {
2748 solve_map_frame (_metrics, ts, frame);
2749 recompute_meters (_metrics);
2754 if (sub_num == 0 && was_musical) {
2755 ts->set_position_lock_style (MusicTime);
2758 Metrics::const_iterator d = future_map.begin();
2759 while (d != future_map.end()) {
2764 MetricPositionChanged (); // Emit Signal
2768 TempoMap::gui_move_meter (MeterSection* ms, const framepos_t& frame)
2772 if (ms->position_lock_style() == AudioTime) {
2775 Glib::Threads::RWLock::WriterLock lm (lock);
2776 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2778 if (solve_map_frame (future_map, copy, frame)) {
2779 solve_map_frame (_metrics, ms, frame);
2780 recompute_tempi (_metrics);
2785 Glib::Threads::RWLock::WriterLock lm (lock);
2786 MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
2788 const double beat = beat_at_frame_locked (_metrics, frame);
2789 const Timecode::BBT_Time bbt = bbt_at_beat_locked (_metrics, beat);
2791 if (solve_map_bbt (future_map, copy, bbt)) {
2792 solve_map_bbt (_metrics, ms, bbt);
2793 recompute_tempi (_metrics);
2798 Metrics::const_iterator d = future_map.begin();
2799 while (d != future_map.end()) {
2804 MetricPositionChanged (); // Emit Signal
2808 TempoMap::gui_change_tempo (TempoSection* ts, const Tempo& bpm)
2811 bool can_solve = false;
2813 Glib::Threads::RWLock::WriterLock lm (lock);
2814 TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
2815 tempo_copy->set_beats_per_minute (bpm.beats_per_minute());
2816 recompute_tempi (future_map);
2818 if (check_solved (future_map)) {
2819 ts->set_beats_per_minute (bpm.beats_per_minute());
2820 recompute_map (_metrics);
2825 Metrics::const_iterator d = future_map.begin();
2826 while (d != future_map.end()) {
2831 MetricPositionChanged (); // Emit Signal
2837 TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame, const double& pulse)
2840 Ts (future prev_t) Tnext
2843 |----------|----------
2850 Glib::Threads::RWLock::WriterLock lm (lock);
2856 TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
2857 TempoSection* prev_to_prev_t = 0;
2858 const frameoffset_t fr_off = end_frame - frame;
2860 if (prev_t && prev_t->pulse() > 0.0) {
2861 prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_frame_locked (future_map, prev_t->frame() - 1));
2864 TempoSection* next_t = 0;
2865 for (Metrics::iterator i = future_map.begin(); i != future_map.end(); ++i) {
2866 TempoSection* t = 0;
2867 if ((*i)->is_tempo()) {
2868 t = static_cast<TempoSection*> (*i);
2869 if (t->frame() > ts->frame()) {
2875 /* minimum allowed measurement distance in frames */
2876 const framepos_t min_dframe = 2;
2878 /* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
2879 constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
2881 double contribution = 0.0;
2883 if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2884 contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
2887 const frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
2889 const double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
2890 const double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
2894 if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
2896 if (prev_t->position_lock_style() == MusicTime) {
2897 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2898 if (frame > prev_to_prev_t->frame() + min_dframe && (frame + prev_t_frame_contribution) > prev_to_prev_t->frame() + min_dframe) {
2900 new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
2901 / (double) ((frame + prev_t_frame_contribution) - prev_to_prev_t->frame()));
2903 new_bpm = prev_t->beats_per_minute();
2906 /* prev to prev is irrelevant */
2908 if (start_pulse > prev_t->pulse() && end_pulse > prev_t->pulse()) {
2909 new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
2911 new_bpm = prev_t->beats_per_minute();
2916 if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
2917 if (frame > prev_to_prev_t->frame() + min_dframe && end_frame > prev_to_prev_t->frame() + min_dframe) {
2919 new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
2920 / (double) ((end_frame) - prev_to_prev_t->frame()));
2922 new_bpm = prev_t->beats_per_minute();
2925 /* prev_to_prev_t is irrelevant */
2927 if (frame > prev_t->frame() + min_dframe && end_frame > prev_t->frame() + min_dframe) {
2928 new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
2930 new_bpm = prev_t->beats_per_minute();
2936 double frame_ratio = 1.0;
2937 double pulse_ratio = 1.0;
2938 const framepos_t pulse_pos = prev_t->frame_at_pulse (pulse, _frame_rate);
2940 if (prev_to_prev_t) {
2941 if (pulse_pos > prev_to_prev_t->frame() + min_dframe && (pulse_pos - fr_off) > prev_to_prev_t->frame() + min_dframe) {
2942 frame_ratio = (((pulse_pos - fr_off) - prev_to_prev_t->frame()) / (double) ((pulse_pos) - prev_to_prev_t->frame()));
2944 if (end_pulse > prev_to_prev_t->pulse() && start_pulse > prev_to_prev_t->pulse()) {
2945 pulse_ratio = ((start_pulse - prev_to_prev_t->pulse()) / (end_pulse - prev_to_prev_t->pulse()));
2948 if (pulse_pos > prev_t->frame() + min_dframe && (pulse_pos - fr_off) > prev_t->frame() + min_dframe) {
2949 frame_ratio = (((pulse_pos - fr_off) - prev_t->frame()) / (double) ((pulse_pos) - prev_t->frame()));
2951 pulse_ratio = (start_pulse / end_pulse);
2953 new_bpm = prev_t->beats_per_minute() * (pulse_ratio * frame_ratio);
2956 /* don't clamp and proceed here.
2957 testing has revealed that this can go negative,
2958 which is an entirely different thing to just being too low.
2960 if (new_bpm < 0.5) {
2963 new_bpm = min (new_bpm, (double) 1000.0);
2964 prev_t->set_beats_per_minute (new_bpm);
2965 recompute_tempi (future_map);
2966 recompute_meters (future_map);
2968 if (check_solved (future_map)) {
2969 ts->set_beats_per_minute (new_bpm);
2970 recompute_tempi (_metrics);
2971 recompute_meters (_metrics);
2975 Metrics::const_iterator d = future_map.begin();
2976 while (d != future_map.end()) {
2981 MetricPositionChanged (); // Emit Signal
2984 /** Returns the exact beat subdivision closest to the supplied frame, possibly returning a negative value.
2985 * @param frame The session frame position.
2986 * @param sub_num The requested beat subdivision to use when rounding the frame position.
2987 * @return The beat position of the supplied frame.
2988 * If the supplied frame lies before the first meter, the return will be negative.
2989 * The returned beat is obtained using the first meter and the continuation of the tempo curve (backwards).
2991 * This function uses both tempo and meter.
2994 TempoMap::exact_beat_at_frame (const framepos_t& frame, const int32_t sub_num)
2996 Glib::Threads::RWLock::ReaderLock lm (lock);
2998 return exact_beat_at_frame_locked (_metrics, frame, sub_num);
3002 TempoMap::exact_beat_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t sub_num)
3004 double beat = beat_at_frame_locked (metrics, frame);
3007 beat = floor (beat) + (floor (((beat - floor (beat)) * (double) sub_num) + 0.5) / sub_num);
3008 } else if (sub_num == 1) {
3010 beat = floor (beat + 0.5);
3011 } else if (sub_num == -1) {
3013 Timecode::BBT_Time bbt = bbt_at_beat_locked (metrics, beat);
3016 beat = beat_at_bbt_locked (metrics, bbt);
3022 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
3024 Glib::Threads::RWLock::ReaderLock lm (lock);
3026 const double tick_at_time = max (0.0, beat_at_frame_locked (_metrics, pos)) * BBT_Time::ticks_per_beat;
3027 const double bbt_ticks = bbt.ticks + (bbt.beats * BBT_Time::ticks_per_beat);
3028 const double total_beats = (tick_at_time + bbt_ticks) / BBT_Time::ticks_per_beat;
3030 return frame_at_beat_locked (_metrics, total_beats);
3034 TempoMap::round_to_bar (framepos_t fr, RoundMode dir)
3036 return round_to_type (fr, dir, Bar);
3040 TempoMap::round_to_beat (framepos_t fr, RoundMode dir)
3042 return round_to_type (fr, dir, Beat);
3046 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, RoundMode dir)
3048 Glib::Threads::RWLock::ReaderLock lm (lock);
3049 uint32_t ticks = (uint32_t) floor (max (0.0, beat_at_frame_locked (_metrics, fr)) * BBT_Time::ticks_per_beat);
3050 uint32_t beats = (uint32_t) floor (ticks / BBT_Time::ticks_per_beat);
3051 uint32_t ticks_one_subdivisions_worth = (uint32_t) BBT_Time::ticks_per_beat / sub_num;
3053 ticks -= beats * BBT_Time::ticks_per_beat;
3056 /* round to next (or same iff dir == RoundUpMaybe) */
3058 uint32_t mod = ticks % ticks_one_subdivisions_worth;
3060 if (mod == 0 && dir == RoundUpMaybe) {
3061 /* right on the subdivision, which is fine, so do nothing */
3063 } else if (mod == 0) {
3064 /* right on the subdivision, so the difference is just the subdivision ticks */
3065 ticks += ticks_one_subdivisions_worth;
3068 /* not on subdivision, compute distance to next subdivision */
3070 ticks += ticks_one_subdivisions_worth - mod;
3073 if (ticks >= BBT_Time::ticks_per_beat) {
3074 ticks -= BBT_Time::ticks_per_beat;
3076 } else if (dir < 0) {
3078 /* round to previous (or same iff dir == RoundDownMaybe) */
3080 uint32_t difference = ticks % ticks_one_subdivisions_worth;
3082 if (difference == 0 && dir == RoundDownAlways) {
3083 /* right on the subdivision, but force-rounding down,
3084 so the difference is just the subdivision ticks */
3085 difference = ticks_one_subdivisions_worth;
3088 if (ticks < difference) {
3089 ticks = BBT_Time::ticks_per_beat - ticks;
3091 ticks -= difference;
3095 /* round to nearest */
3098 /* compute the distance to the previous and next subdivision */
3100 if ((rem = fmod ((double) ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
3102 /* closer to the next subdivision, so shift forward */
3104 ticks = lrint (ticks + (ticks_one_subdivisions_worth - rem));
3106 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", ticks));
3108 if (ticks > BBT_Time::ticks_per_beat) {
3110 ticks -= BBT_Time::ticks_per_beat;
3111 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", beats));
3114 } else if (rem > 0) {
3116 /* closer to previous subdivision, so shift backward */
3120 /* can't go backwards past zero, so ... */
3123 /* step back to previous beat */
3125 ticks = lrint (BBT_Time::ticks_per_beat - rem);
3126 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", beats));
3128 ticks = lrint (ticks - rem);
3129 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", ticks));
3132 /* on the subdivision, do nothing */
3136 const framepos_t ret_frame = frame_at_beat_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat));
3142 TempoMap::round_to_type (framepos_t frame, RoundMode dir, BBTPointType type)
3144 Glib::Threads::RWLock::ReaderLock lm (lock);
3146 const double beat_at_framepos = beat_at_frame_locked (_metrics, frame);
3147 BBT_Time bbt (bbt_at_beat_locked (_metrics, beat_at_framepos));
3152 /* find bar previous to 'frame' */
3155 return frame_at_bbt_locked (_metrics, bbt);
3157 } else if (dir > 0) {
3158 /* find bar following 'frame' */
3162 return frame_at_bbt_locked (_metrics, bbt);
3164 /* true rounding: find nearest bar */
3165 framepos_t raw_ft = frame_at_bbt_locked (_metrics, bbt);
3168 framepos_t prev_ft = frame_at_bbt_locked (_metrics, bbt);
3170 framepos_t next_ft = frame_at_bbt_locked (_metrics, bbt);
3172 if ((raw_ft - prev_ft) > (next_ft - prev_ft) / 2) {
3183 return frame_at_beat_locked (_metrics, floor (beat_at_framepos));
3184 } else if (dir > 0) {
3185 return frame_at_beat_locked (_metrics, ceil (beat_at_framepos));
3187 return frame_at_beat_locked (_metrics, floor (beat_at_framepos + 0.5));
3196 TempoMap::get_grid (vector<TempoMap::BBTPoint>& points,
3197 framepos_t lower, framepos_t upper)
3199 Glib::Threads::RWLock::ReaderLock lm (lock);
3200 int32_t cnt = ceil (beat_at_frame_locked (_metrics, lower));
3202 /* although the map handles negative beats, bbt doesn't. */
3207 if (frame_at_beat_locked (_metrics, cnt) >= upper) {
3211 while (pos < upper) {
3212 pos = frame_at_beat_locked (_metrics, cnt);
3213 const TempoSection tempo = tempo_section_at_frame_locked (_metrics, pos);
3214 const MeterSection meter = meter_section_at_frame_locked (_metrics, pos);
3215 const BBT_Time bbt = bbt_at_beat_locked (_metrics, cnt);
3216 points.push_back (BBTPoint (meter, tempo_at_frame_locked (_metrics, pos), pos, bbt.bars, bbt.beats, tempo.c_func()));
3222 TempoMap::tempo_section_at_frame (framepos_t frame) const
3224 Glib::Threads::RWLock::ReaderLock lm (lock);
3225 return tempo_section_at_frame_locked (_metrics, frame);
3229 TempoMap::tempo_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const
3231 TempoSection* prev = 0;
3235 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3237 if ((*i)->is_tempo()) {
3238 t = static_cast<TempoSection*> (*i);
3242 if (prev && t->frame() > frame) {
3252 abort(); /*NOTREACHED*/
3259 TempoMap::tempo_section_at_beat_locked (const Metrics& metrics, const double& beat) const
3261 TempoSection* prev_t = 0;
3262 const MeterSection* prev_m = &meter_section_at_beat_locked (metrics, beat);
3266 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3267 if ((*i)->is_tempo()) {
3268 t = static_cast<TempoSection*> (*i);
3269 if (prev_t && ((t->pulse() - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > beat) {
3279 /* don't use this to calculate length (the tempo is only correct for this frame).
3280 do that stuff based on the beat_at_frame and frame_at_beat api
3283 TempoMap::frames_per_beat_at (const framepos_t& frame, const framecnt_t& sr) const
3285 Glib::Threads::RWLock::ReaderLock lm (lock);
3287 const TempoSection* ts_at = 0;
3288 const TempoSection* ts_after = 0;
3289 Metrics::const_iterator i;
3292 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3294 if ((*i)->is_tempo()) {
3295 t = static_cast<TempoSection*> (*i);
3299 if (ts_at && (*i)->frame() > frame) {
3308 return (60.0 * _frame_rate) / (ts_at->tempo_at_frame (frame, _frame_rate) * ts_at->note_type());
3310 /* must be treated as constant tempo */
3311 return ts_at->frames_per_beat (_frame_rate);
3315 TempoMap::meter_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const
3317 Metrics::const_iterator i;
3318 MeterSection* prev = 0;
3322 for (i = metrics.begin(); i != metrics.end(); ++i) {
3324 if (!(*i)->is_tempo()) {
3325 m = static_cast<MeterSection*> (*i);
3327 if (prev && (*i)->frame() > frame) {
3337 abort(); /*NOTREACHED*/
3345 TempoMap::meter_section_at_frame (framepos_t frame) const
3347 Glib::Threads::RWLock::ReaderLock lm (lock);
3348 return meter_section_at_frame_locked (_metrics, frame);
3352 TempoMap::meter_section_at_beat_locked (const Metrics& metrics, const double& beat) const
3354 MeterSection* prev_m = 0;
3356 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3358 if (!(*i)->is_tempo()) {
3359 m = static_cast<MeterSection*> (*i);
3360 if (prev_m && m->beat() > beat) {
3371 TempoMap::meter_section_at_beat (double beat) const
3373 Glib::Threads::RWLock::ReaderLock lm (lock);
3374 return meter_section_at_beat_locked (_metrics, beat);
3378 TempoMap::meter_at_frame (framepos_t frame) const
3380 TempoMetric m (metric_at (frame));
3385 TempoMap::fix_legacy_session ()
3387 MeterSection* prev_m = 0;
3388 TempoSection* prev_t = 0;
3390 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3394 if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3395 if (!m->movable()) {
3396 pair<double, BBT_Time> bbt = make_pair (0.0, BBT_Time (1, 1, 0));
3400 m->set_position_lock_style (AudioTime);
3405 pair<double, BBT_Time> start = make_pair (((m->bbt().bars - 1) * prev_m->note_divisor())
3406 + (m->bbt().beats - 1)
3407 + (m->bbt().ticks / BBT_Time::ticks_per_beat)
3409 m->set_beat (start);
3410 const double start_beat = ((m->bbt().bars - 1) * prev_m->note_divisor())
3411 + (m->bbt().beats - 1)
3412 + (m->bbt().ticks / BBT_Time::ticks_per_beat);
3413 m->set_pulse (start_beat / prev_m->note_divisor());
3416 } else if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3422 if (!t->movable()) {
3425 t->set_position_lock_style (AudioTime);
3431 const double beat = ((t->legacy_bbt().bars - 1) * ((prev_m) ? prev_m->note_divisor() : 4.0))
3432 + (t->legacy_bbt().beats - 1)
3433 + (t->legacy_bbt().ticks / BBT_Time::ticks_per_beat);
3435 t->set_pulse (beat / prev_m->note_divisor());
3437 /* really shouldn't happen but.. */
3438 t->set_pulse (beat / 4.0);
3447 TempoMap::get_state ()
3449 Metrics::const_iterator i;
3450 XMLNode *root = new XMLNode ("TempoMap");
3453 Glib::Threads::RWLock::ReaderLock lm (lock);
3454 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3455 root->add_child_nocopy ((*i)->get_state());
3463 TempoMap::set_state (const XMLNode& node, int /*version*/)
3466 Glib::Threads::RWLock::WriterLock lm (lock);
3469 XMLNodeConstIterator niter;
3470 Metrics old_metrics (_metrics);
3473 nlist = node.children();
3475 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
3476 XMLNode* child = *niter;
3478 if (child->name() == TempoSection::xml_state_node_name) {
3481 TempoSection* ts = new TempoSection (*child);
3482 _metrics.push_back (ts);
3485 catch (failed_constructor& err){
3486 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3487 _metrics = old_metrics;
3488 old_metrics.clear();
3492 } else if (child->name() == MeterSection::xml_state_node_name) {
3495 MeterSection* ms = new MeterSection (*child);
3496 _metrics.push_back (ms);
3499 catch (failed_constructor& err) {
3500 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
3501 _metrics = old_metrics;
3502 old_metrics.clear();
3508 if (niter == nlist.end()) {
3509 MetricSectionSorter cmp;
3510 _metrics.sort (cmp);
3513 /* check for legacy sessions where bbt was the base musical unit for tempo */
3514 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3516 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
3517 if (t->legacy_bbt().bars != 0) {
3518 fix_legacy_session();
3525 /* check for multiple tempo/meters at the same location, which
3526 ardour2 somehow allowed.
3529 Metrics::iterator prev = _metrics.end();
3530 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3531 if (prev != _metrics.end()) {
3533 MeterSection* prev_m;
3535 TempoSection* prev_t;
3536 if ((prev_m = dynamic_cast<MeterSection*>(*prev)) != 0 && (ms = dynamic_cast<MeterSection*>(*i)) != 0) {
3537 if (prev_m->pulse() == ms->pulse()) {
3538 cerr << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3539 error << string_compose (_("Multiple meter definitions found at %1"), prev_m->pulse()) << endmsg;
3542 } else if ((prev_t = dynamic_cast<TempoSection*>(*prev)) != 0 && (ts = dynamic_cast<TempoSection*>(*i)) != 0) {
3543 if (prev_t->pulse() == ts->pulse()) {
3544 cerr << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3545 error << string_compose (_("Multiple tempo definitions found at %1"), prev_t->pulse()) << endmsg;
3553 recompute_map (_metrics);
3555 Metrics::const_iterator d = old_metrics.begin();
3556 while (d != old_metrics.end()) {
3560 old_metrics.clear ();
3563 PropertyChanged (PropertyChange ());
3569 TempoMap::dump (const Metrics& metrics, std::ostream& o) const
3571 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
3572 const MeterSection* m;
3573 const TempoSection* t;
3574 const TempoSection* prev_t = 0;
3576 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
3578 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
3579 o << "Tempo @ " << *i << t->beats_per_minute() << " BPM (pulse = 1/" << t->note_type() << ") at " << t->pulse() << " frame= " << t->frame() << " (movable? "
3580 << t->movable() << ')' << " pos lock: " << enum_2_string (t->position_lock_style()) << std::endl;
3581 o << "current : " << t->beats_per_minute() << " | " << t->pulse() << " | " << t->frame() << std::endl;
3583 o << "previous : " << prev_t->beats_per_minute() << " | " << prev_t->pulse() << " | " << prev_t->frame() << std::endl;
3584 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;
3587 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
3588 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->bbt() << " frame= " << m->frame()
3589 << " pulse: " << m->pulse() << " beat : " << m->beat() << " pos lock: " << enum_2_string (m->position_lock_style()) << " (movable? " << m->movable() << ')' << endl;
3592 o << "------" << std::endl;
3596 TempoMap::n_tempos() const
3598 Glib::Threads::RWLock::ReaderLock lm (lock);
3601 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3602 if ((*i)->is_tempo()) {
3611 TempoMap::n_meters() const
3613 Glib::Threads::RWLock::ReaderLock lm (lock);
3616 for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3617 if (!(*i)->is_tempo()) {
3626 TempoMap::insert_time (framepos_t where, framecnt_t amount)
3629 Glib::Threads::RWLock::WriterLock lm (lock);
3630 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3631 if ((*i)->frame() >= where && (*i)->movable ()) {
3632 (*i)->set_frame ((*i)->frame() + amount);
3636 /* now reset the BBT time of all metrics, based on their new
3637 * audio time. This is the only place where we do this reverse
3641 Metrics::iterator i;
3642 const MeterSection* meter;
3643 const TempoSection* tempo;
3647 meter = &first_meter ();
3648 tempo = &first_tempo ();
3653 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
3656 MetricSection* prev = 0;
3658 for (i = _metrics.begin(); i != _metrics.end(); ++i) {
3661 //TempoMetric metric (*meter, *tempo);
3662 MeterSection* ms = const_cast<MeterSection*>(meter);
3663 TempoSection* ts = const_cast<TempoSection*>(tempo);
3666 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3670 ts->set_pulse (t->pulse());
3672 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3673 ts->set_pulse (m->pulse());
3675 ts->set_frame (prev->frame());
3679 if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
3680 pair<double, BBT_Time> start = make_pair (m->beat(), m->bbt());
3681 ms->set_beat (start);
3682 ms->set_pulse (m->pulse());
3684 if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
3688 const double beat = beat_at_pulse_locked (_metrics, t->pulse());
3689 pair<double, BBT_Time> start = make_pair (beat, bbt_at_beat_locked (_metrics, beat));
3690 ms->set_beat (start);
3691 ms->set_pulse (t->pulse());
3693 ms->set_frame (prev->frame());
3697 // metric will be at frames=0 bbt=1|1|0 by default
3698 // which is correct for our purpose
3701 // cerr << bbt << endl;
3703 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
3707 t->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3709 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3710 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
3711 bbt = bbt_at_frame_locked (_metrics, m->frame());
3713 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
3719 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
3720 /* round up to next beat */
3726 if (bbt.beats != 1) {
3727 /* round up to next bar */
3732 pair<double, BBT_Time> start = make_pair (max (0.0, beat_at_frame_locked (_metrics, m->frame())), bbt);
3733 m->set_beat (start);
3734 m->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
3736 // cerr << "NEW METER, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
3738 fatal << _("programming error: unhandled MetricSection type") << endmsg;
3739 abort(); /*NOTREACHED*/
3745 recompute_map (_metrics);
3749 PropertyChanged (PropertyChange ());
3752 TempoMap::remove_time (framepos_t where, framecnt_t amount)
3756 std::list<MetricSection*> metric_kill_list;
3758 TempoSection* last_tempo = NULL;
3759 MeterSection* last_meter = NULL;
3760 bool tempo_after = false; // is there a tempo marker at the first sample after the removed range?
3761 bool meter_after = false; // is there a meter marker likewise?
3763 Glib::Threads::RWLock::WriterLock lm (lock);
3764 for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
3765 if ((*i)->frame() >= where && (*i)->frame() < where+amount) {
3766 metric_kill_list.push_back(*i);
3767 TempoSection *lt = dynamic_cast<TempoSection*> (*i);
3770 MeterSection *lm = dynamic_cast<MeterSection*> (*i);
3774 else if ((*i)->frame() >= where) {
3775 // TODO: make sure that moved tempo/meter markers are rounded to beat/bar boundaries
3776 (*i)->set_frame ((*i)->frame() - amount);
3777 if ((*i)->frame() == where) {
3778 // marker was immediately after end of range
3779 tempo_after = dynamic_cast<TempoSection*> (*i);
3780 meter_after = dynamic_cast<MeterSection*> (*i);
3786 //find the last TEMPO and METER metric (if any) and move it to the cut point so future stuff is correct
3787 if (last_tempo && !tempo_after) {
3788 metric_kill_list.remove(last_tempo);
3789 last_tempo->set_frame(where);
3792 if (last_meter && !meter_after) {
3793 metric_kill_list.remove(last_meter);
3794 last_meter->set_frame(where);
3798 //remove all the remaining metrics
3799 for (std::list<MetricSection*>::iterator i = metric_kill_list.begin(); i != metric_kill_list.end(); ++i) {
3800 _metrics.remove(*i);
3805 recompute_map (_metrics);
3808 PropertyChanged (PropertyChange ());
3812 /** Add some (fractional) beats to a session frame position, and return the result in frames.
3813 * pos can be -ve, if required.
3816 TempoMap::framepos_plus_beats (framepos_t frame, Evoral::Beats beats) const
3818 Glib::Threads::RWLock::ReaderLock lm (lock);
3820 return frame_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, frame) + beats.to_double());
3823 /** Subtract some (fractional) beats from a frame position, and return the result in frames */
3825 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::Beats beats) const
3827 Glib::Threads::RWLock::ReaderLock lm (lock);
3829 return frame_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, pos) - beats.to_double());
3832 /** Add the BBT interval op to pos and return the result */
3834 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
3836 Glib::Threads::RWLock::ReaderLock lm (lock);
3838 BBT_Time pos_bbt = bbt_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, pos));
3839 pos_bbt.ticks += op.ticks;
3840 if (pos_bbt.ticks >= BBT_Time::ticks_per_beat) {
3842 pos_bbt.ticks -= BBT_Time::ticks_per_beat;
3844 pos_bbt.beats += op.beats;
3845 /* the meter in effect will start on the bar */
3846 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();
3847 while (pos_bbt.beats >= divisions_per_bar + 1) {
3849 divisions_per_bar = meter_section_at_beat (beat_at_bbt_locked (_metrics, BBT_Time (pos_bbt.bars + op.bars, 1, 0))).divisions_per_bar();
3850 pos_bbt.beats -= divisions_per_bar;
3852 pos_bbt.bars += op.bars;
3854 return frame_at_bbt_locked (_metrics, pos_bbt);
3857 /** Count the number of beats that are equivalent to distance when going forward,
3861 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
3863 Glib::Threads::RWLock::ReaderLock lm (lock);
3865 return Evoral::Beats (beat_at_frame_locked (_metrics, pos + distance) - beat_at_frame_locked (_metrics, pos));
3869 bool operator() (const BBT_Time& a, const BBT_Time& b) {
3875 operator<< (std::ostream& o, const Meter& m) {
3876 return o << m.divisions_per_bar() << '/' << m.note_divisor();
3880 operator<< (std::ostream& o, const Tempo& t) {
3881 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
3885 operator<< (std::ostream& o, const MetricSection& section) {
3887 o << "MetricSection @ " << section.frame() << ' ';
3889 const TempoSection* ts;
3890 const MeterSection* ms;
3892 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
3893 o << *((const Tempo*) ts);
3894 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
3895 o << *((const Meter*) ms);