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.
27 #include <glibmm/thread.h>
28 #include "pbd/xml++.h"
29 #include "evoral/types.hpp"
30 #include "ardour/debug.h"
31 #include "ardour/tempo.h"
32 #include "ardour/utils.h"
38 using namespace ARDOUR;
41 using Timecode::BBT_Time;
43 /* _default tempo is 4/4 qtr=120 */
45 Meter TempoMap::_default_meter (4.0, 4.0);
46 Tempo TempoMap::_default_tempo (120.0);
49 Tempo::frames_per_beat (framecnt_t sr) const
51 return (60.0 * sr) / _beats_per_minute;
54 /***********************************************************************/
57 Meter::frames_per_grid (const Tempo& tempo, framecnt_t sr) const
59 /* This is tempo- and meter-sensitive. The number it returns
60 is based on the interval between any two lines in the
61 grid that is constructed from tempo and meter sections.
63 The return value IS NOT interpretable in terms of "beats".
66 return (60.0 * sr) / (tempo.beats_per_minute() * (_note_type/tempo.note_type()));
70 Meter::frames_per_bar (const Tempo& tempo, framecnt_t sr) const
72 return frames_per_grid (tempo, sr) * _divisions_per_bar;
75 /***********************************************************************/
77 const string TempoSection::xml_state_node_name = "Tempo";
79 TempoSection::TempoSection (const XMLNode& node)
80 : MetricSection (BBT_Time()), Tempo (TempoMap::default_tempo())
82 const XMLProperty *prop;
84 LocaleGuard lg (X_("POSIX"));
86 if ((prop = node.property ("start")) == 0) {
87 error << _("TempoSection XML node has no \"start\" property") << endmsg;
88 throw failed_constructor();
91 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
95 error << _("TempoSection XML node has an illegal \"start\" value") << endmsg;
96 throw failed_constructor();
101 if ((prop = node.property ("beats-per-minute")) == 0) {
102 error << _("TempoSection XML node has no \"beats-per-minute\" property") << endmsg;
103 throw failed_constructor();
106 if (sscanf (prop->value().c_str(), "%lf", &_beats_per_minute) != 1 || _beats_per_minute < 0.0) {
107 error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg;
108 throw failed_constructor();
111 if ((prop = node.property ("note-type")) == 0) {
112 /* older session, make note type be quarter by default */
115 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 1.0) {
116 error << _("TempoSection XML node has an illegal \"note-type\" value") << endmsg;
117 throw failed_constructor();
121 if ((prop = node.property ("movable")) == 0) {
122 error << _("TempoSection XML node has no \"movable\" property") << endmsg;
123 throw failed_constructor();
126 set_movable (string_is_affirmative (prop->value()));
128 if ((prop = node.property ("bar-offset")) == 0) {
131 if (sscanf (prop->value().c_str(), "%lf", &_bar_offset) != 1 || _bar_offset < 0.0) {
132 error << _("TempoSection XML node has an illegal \"bar-offset\" value") << endmsg;
133 throw failed_constructor();
139 TempoSection::get_state() const
141 XMLNode *root = new XMLNode (xml_state_node_name);
143 LocaleGuard lg (X_("POSIX"));
145 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
149 root->add_property ("start", buf);
150 snprintf (buf, sizeof (buf), "%f", _beats_per_minute);
151 root->add_property ("beats-per-minute", buf);
152 snprintf (buf, sizeof (buf), "%f", _note_type);
153 root->add_property ("note-type", buf);
154 // snprintf (buf, sizeof (buf), "%f", _bar_offset);
155 // root->add_property ("bar-offset", buf);
156 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
157 root->add_property ("movable", buf);
164 TempoSection::update_bar_offset_from_bbt (const Meter& m)
166 _bar_offset = ((start().beats - 1) * BBT_Time::ticks_per_beat + start().ticks) /
167 (m.divisions_per_bar() * BBT_Time::ticks_per_beat);
169 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Tempo set bar offset to %1 from %2 w/%3\n", _bar_offset, start(), m.divisions_per_bar()));
173 TempoSection::update_bbt_time_from_bar_offset (const Meter& meter)
177 if (_bar_offset < 0.0) {
182 new_start.bars = start().bars;
184 double ticks = BBT_Time::ticks_per_beat * meter.divisions_per_bar() * _bar_offset;
185 new_start.beats = (uint32_t) floor (ticks/BBT_Time::ticks_per_beat);
186 new_start.ticks = 0; /* (uint32_t) fmod (ticks, BBT_Time::ticks_per_beat); */
188 /* remember the 1-based counting properties of beats */
189 new_start.beats += 1;
191 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("from bar offset %1 and dpb %2, ticks = %3->%4 beats = %5\n",
192 _bar_offset, meter.divisions_per_bar(), ticks, new_start.ticks, new_start.beats));
194 set_start (new_start);
197 /***********************************************************************/
199 const string MeterSection::xml_state_node_name = "Meter";
201 MeterSection::MeterSection (const XMLNode& node)
202 : MetricSection (BBT_Time()), Meter (TempoMap::default_meter())
204 const XMLProperty *prop;
206 LocaleGuard lg (X_("POSIX"));
208 if ((prop = node.property ("start")) == 0) {
209 error << _("MeterSection XML node has no \"start\" property") << endmsg;
210 throw failed_constructor();
213 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
217 error << _("MeterSection XML node has an illegal \"start\" value") << endmsg;
218 throw failed_constructor();
223 /* beats-per-bar is old; divisions-per-bar is new */
225 if ((prop = node.property ("divisions-per-bar")) == 0) {
226 if ((prop = node.property ("beats-per-bar")) == 0) {
227 error << _("MeterSection XML node has no \"beats-per-bar\" or \"divisions-per-bar\" property") << endmsg;
228 throw failed_constructor();
232 if (sscanf (prop->value().c_str(), "%lf", &_divisions_per_bar) != 1 || _divisions_per_bar < 0.0) {
233 error << _("MeterSection XML node has an illegal \"beats-per-bar\" or \"divisions-per-bar\" value") << endmsg;
234 throw failed_constructor();
237 if ((prop = node.property ("note-type")) == 0) {
238 error << _("MeterSection XML node has no \"note-type\" property") << endmsg;
239 throw failed_constructor();
242 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) {
243 error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg;
244 throw failed_constructor();
247 if ((prop = node.property ("movable")) == 0) {
248 error << _("MeterSection XML node has no \"movable\" property") << endmsg;
249 throw failed_constructor();
252 set_movable (string_is_affirmative (prop->value()));
256 MeterSection::get_state() const
258 XMLNode *root = new XMLNode (xml_state_node_name);
260 LocaleGuard lg (X_("POSIX"));
262 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
266 root->add_property ("start", buf);
267 snprintf (buf, sizeof (buf), "%f", _note_type);
268 root->add_property ("note-type", buf);
269 snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
270 root->add_property ("divisions-per-bar", buf);
271 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
272 root->add_property ("movable", buf);
277 /***********************************************************************/
279 struct MetricSectionSorter {
280 bool operator() (const MetricSection* a, const MetricSection* b) {
281 return a->start() < b->start();
285 TempoMap::TempoMap (framecnt_t fr)
294 TempoSection *t = new TempoSection (start, _default_tempo.beats_per_minute(), _default_tempo.note_type());
295 MeterSection *m = new MeterSection (start, _default_meter.divisions_per_bar(), _default_meter.note_divisor());
297 t->set_movable (false);
298 m->set_movable (false);
300 /* note: frame time is correct (zero) for both of these */
302 metrics.push_back (t);
303 metrics.push_back (m);
306 TempoMap::~TempoMap ()
311 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
313 bool removed = false;
316 Glib::RWLock::WriterLock lm (lock);
319 for (i = metrics.begin(); i != metrics.end(); ++i) {
320 if (dynamic_cast<TempoSection*> (*i) != 0) {
321 if (tempo.frame() == (*i)->frame()) {
322 if ((*i)->movable()) {
331 if (removed && complete_operation) {
332 recompute_map (false);
336 if (removed && complete_operation) {
337 PropertyChanged (PropertyChange ());
342 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
344 bool removed = false;
347 Glib::RWLock::WriterLock lm (lock);
350 for (i = metrics.begin(); i != metrics.end(); ++i) {
351 if (dynamic_cast<MeterSection*> (*i) != 0) {
352 if (tempo.frame() == (*i)->frame()) {
353 if ((*i)->movable()) {
362 if (removed && complete_operation) {
363 recompute_map (true);
367 if (removed && complete_operation) {
368 PropertyChanged (PropertyChange ());
373 TempoMap::do_insert (MetricSection* section)
375 bool need_add = true;
377 assert (section->start().ticks == 0);
379 /* we only allow new meters to be inserted on beat 1 of an existing
383 if (dynamic_cast<MeterSection*>(section)) {
385 /* we need to (potentially) update the BBT times of tempo
386 sections based on this new meter.
389 if ((section->start().beats != 1) || (section->start().ticks != 0)) {
391 BBT_Time corrected = section->start();
395 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
396 section->start(), corrected) << endmsg;
398 section->set_start (corrected);
404 /* Look for any existing MetricSection that is of the same type and
405 in the same bar as the new one, and remove it before adding
406 the new one. Note that this means that if we find a matching,
407 existing section, we can break out of the loop since we're
408 guaranteed that there is only one such match.
411 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
413 bool const iter_is_tempo = dynamic_cast<TempoSection*> (*i) != 0;
414 bool const insert_is_tempo = dynamic_cast<TempoSection*> (section) != 0;
416 if (iter_is_tempo && insert_is_tempo) {
420 if ((*i)->start().bars == section->start().bars &&
421 (*i)->start().beats == section->start().beats) {
423 if (!(*i)->movable()) {
425 /* can't (re)move this section, so overwrite
426 * its data content (but not its properties as
430 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(section));
438 } else if (!iter_is_tempo && !insert_is_tempo) {
442 if ((*i)->start().bars == section->start().bars) {
444 if (!(*i)->movable()) {
446 /* can't (re)move this section, so overwrite
447 * its data content (but not its properties as
451 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(section));
461 /* non-matching types, so we don't care */
465 /* Add the given MetricSection, if we didn't just reset an existing
473 for (i = metrics.begin(); i != metrics.end(); ++i) {
474 if ((*i)->start() > section->start()) {
479 metrics.insert (i, section);
484 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const BBT_Time& where)
486 const TempoSection& first (first_tempo());
488 if (ts.start() != first.start()) {
489 remove_tempo (ts, false);
490 add_tempo (tempo, where);
493 Glib::RWLock::WriterLock lm (lock);
494 /* cannot move the first tempo section */
495 *((Tempo*)&first) = tempo;
496 recompute_map (false);
500 PropertyChanged (PropertyChange ());
504 TempoMap::add_tempo (const Tempo& tempo, BBT_Time where)
507 Glib::RWLock::WriterLock lm (lock);
509 /* new tempos always start on a beat */
512 TempoSection* ts = new TempoSection (where, tempo.beats_per_minute(), tempo.note_type());
514 /* find the meter to use to set the bar offset of this
518 const Meter* meter = &first_meter();
520 /* as we start, we are *guaranteed* to have m.meter and m.tempo pointing
521 at something, because we insert the default tempo and meter during
522 TempoMap construction.
524 now see if we can find better candidates.
527 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
529 const MeterSection* m;
531 if (where < (*i)->start()) {
535 if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
540 ts->update_bar_offset_from_bbt (*meter);
546 recompute_map (false);
550 PropertyChanged (PropertyChange ());
554 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where)
556 const MeterSection& first (first_meter());
558 if (ms.start() != first.start()) {
559 remove_meter (ms, false);
560 add_meter (meter, where);
563 Glib::RWLock::WriterLock lm (lock);
564 /* cannot move the first meter section */
565 *((Meter*)&first) = meter;
566 recompute_map (true);
570 PropertyChanged (PropertyChange ());
574 TempoMap::add_meter (const Meter& meter, BBT_Time where)
577 Glib::RWLock::WriterLock lm (lock);
579 /* a new meter always starts a new bar on the first beat. so
580 round the start time appropriately. remember that
581 `where' is based on the existing tempo map, not
582 the result after we insert the new meter.
586 if (where.beats != 1) {
591 /* new meters *always* start on a beat. */
594 do_insert (new MeterSection (where, meter.divisions_per_bar(), meter.note_divisor()));
595 recompute_map (true);
600 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
605 PropertyChanged (PropertyChange ());
609 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
611 Tempo newtempo (beats_per_minute, note_type);
614 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
615 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
617 Glib::RWLock::WriterLock lm (lock);
618 *((Tempo*) t) = newtempo;
619 recompute_map (false);
621 PropertyChanged (PropertyChange ());
628 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
630 Tempo newtempo (beats_per_minute, note_type);
636 /* find the TempoSection immediately preceding "where"
639 for (first = 0, i = metrics.begin(), prev = 0; i != metrics.end(); ++i) {
641 if ((*i)->frame() > where) {
647 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
657 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
667 Glib::RWLock::WriterLock lm (lock);
668 /* cannot move the first tempo section */
669 *((Tempo*)prev) = newtempo;
670 recompute_map (false);
673 PropertyChanged (PropertyChange ());
677 TempoMap::first_meter () const
679 const MeterSection *m = 0;
681 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
682 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
687 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
693 TempoMap::first_tempo () const
695 const TempoSection *t = 0;
697 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
698 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
703 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
709 TempoMap::require_map_to (framepos_t pos)
711 Glib::RWLock::WriterLock lm (lock);
713 if (_map.empty() || _map.back().frame < pos) {
719 TempoMap::require_map_to (const BBT_Time& bbt)
721 Glib::RWLock::WriterLock lm (lock);
723 /* since we have no idea where BBT is if its off the map, see the last
724 * point in the map is past BBT, and if not add an arbitrary amount of
728 int additional_minutes = 1;
731 if (!_map.empty() && _map.back().bar >= (bbt.bars + 1)) {
734 /* add some more distance, using bigger steps each time */
735 extend_map (_map.back().frame + (_frame_rate * 60 * additional_minutes));
736 additional_minutes *= 2;
741 TempoMap::recompute_map (bool reassign_tempo_bbt, framepos_t end)
743 /* CALLER MUST HOLD WRITE LOCK */
745 MeterSection* meter = 0;
746 TempoSection* tempo = 0;
747 double current_frame;
749 Metrics::iterator next_metric;
753 /* we will actually stop once we hit
759 if (!_map.empty ()) {
760 /* never allow the map to be shortened */
761 end = max (end, _map.back().frame);
765 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
767 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
770 if ((ms = dynamic_cast<MeterSection *> (*i)) != 0) {
776 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
779 if ((ts = dynamic_cast<TempoSection *> (*i)) != 0) {
785 /* assumes that the first meter & tempo are at frame zero */
787 meter->set_frame (0);
788 tempo->set_frame (0);
790 /* assumes that the first meter & tempo are at 1|1|0 */
795 if (reassign_tempo_bbt) {
797 MeterSection* rmeter = meter;
799 DEBUG_TRACE (DEBUG::TempoMath, "\tUpdating tempo marks BBT time from bar offset\n");
801 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
806 if ((ts = dynamic_cast<TempoSection*>(*i)) != 0) {
808 /* reassign the BBT time of this tempo section
809 * based on its bar offset position.
812 ts->update_bbt_time_from_bar_offset (*rmeter);
814 } else if ((ms = dynamic_cast<MeterSection*>(*i)) != 0) {
817 fatal << _("programming error: unhandled MetricSection type") << endmsg;
823 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("start with meter = %1 tempo = %2\n", *((Meter*)meter), *((Tempo*)tempo)));
825 next_metric = metrics.begin();
826 ++next_metric; // skip meter (or tempo)
827 ++next_metric; // skip tempo (or meter)
831 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add first bar at 1|1 @ %2\n", current.bars, current_frame));
832 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), 1, 1));
835 /* silly call from Session::process() during startup
840 _extend_map (tempo, meter, next_metric, current, current_frame, end);
844 TempoMap::extend_map (framepos_t end)
846 /* CALLER MUST HOLD WRITE LOCK */
849 recompute_map (false, end);
853 BBTPointList::const_iterator i = _map.end();
854 Metrics::iterator next_metric;
858 BBT_Time last_metric_start;
860 if ((*i).tempo->frame() > (*i).meter->frame()) {
861 last_metric_start = (*i).tempo->start();
863 last_metric_start = (*i).meter->start();
866 /* find the metric immediately after the tempo + meter sections for the
867 * last point in the map
870 for (next_metric = metrics.begin(); next_metric != metrics.end(); ++next_metric) {
871 if ((*next_metric)->start() > last_metric_start) {
876 /* we cast away const here because this is the one place where we need
877 * to actually modify the frame time of each metric section.
880 _extend_map (const_cast<TempoSection*> ((*i).tempo),
881 const_cast<MeterSection*> ((*i).meter),
882 next_metric, BBT_Time ((*i).bar, (*i).beat, 0), (*i).frame, end);
886 TempoMap::_extend_map (TempoSection* tempo, MeterSection* meter,
887 Metrics::iterator next_metric,
888 BBT_Time current, framepos_t current_frame, framepos_t end)
890 /* CALLER MUST HOLD WRITE LOCK */
895 framepos_t bar_start_frame;
897 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Extend map to %1 from %2 = %3\n", end, current, current_frame));
899 if (current.beats == 1) {
900 bar_start_frame = current_frame;
905 beat_frames = meter->frames_per_grid (*tempo,_frame_rate);
907 while (current_frame < end) {
910 current_frame += beat_frames;
912 if (current.beats > meter->divisions_per_bar()) {
917 if (next_metric != metrics.end()) {
919 /* no operator >= so invert operator < */
921 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1 next metric @ %2\n", current, (*next_metric)->start()));
923 if (!(current < (*next_metric)->start())) {
926 if (((ts = dynamic_cast<TempoSection*> (*next_metric)) != 0)) {
930 /* new tempo section: if its on a beat,
931 * we don't have to do anything other
932 * than recompute various distances,
933 * done further below as we transition
934 * the next metric section.
936 * if its not on the beat, we have to
937 * compute the duration of the beat it
938 * is within, which will be different
939 * from the preceding following ones
940 * since it takes part of its duration
941 * from the preceding tempo and part
942 * from this new tempo.
945 if (tempo->start().ticks != 0) {
947 double next_beat_frames = tempo->frames_per_beat (_frame_rate);
949 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into non-beat-aligned tempo metric at %1 = %2, adjust next beat using %3\n",
950 tempo->start(), current_frame, tempo->bar_offset()));
952 /* back up to previous beat */
953 current_frame -= beat_frames;
955 /* set tempo section location
956 * based on offset from last
959 tempo->set_frame (bar_start_frame +
960 llrint ((ts->bar_offset() * meter->divisions_per_bar() * beat_frames)));
962 /* advance to the location of
963 * the new (adjusted) beat. do
964 * this by figuring out the
965 * offset within the beat that
966 * would have been there
968 * change. then stretch the
972 double offset_within_old_beat = (tempo->frame() - current_frame) / beat_frames;
974 current_frame += (offset_within_old_beat * beat_frames) + ((1.0 - offset_within_old_beat) * next_beat_frames);
976 /* next metric doesn't have to
977 * match this precisely to
980 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Adjusted last beat to %1\n", current_frame));
984 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into beat-aligned tempo metric at %1 = %2\n",
985 tempo->start(), current_frame));
986 tempo->set_frame (current_frame);
989 } else if ((ms = dynamic_cast<MeterSection*>(*next_metric)) != 0) {
993 /* new meter section: always defines the
997 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into meter section at %1 vs %2 (%3)\n",
998 meter->start(), current, current_frame));
1000 assert (current.beats == 1);
1002 meter->set_frame (current_frame);
1005 beat_frames = meter->frames_per_grid (*tempo, _frame_rate);
1007 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("New metric with beat frames = %1 dpb %2 meter %3 tempo %4\n",
1008 beat_frames, meter->divisions_per_bar(), *((Meter*)meter), *((Tempo*)tempo)));
1012 if (next_metric != metrics.end() && ((*next_metric)->start() == current)) {
1013 /* same position so go back and set this one up before advancing
1020 if (current.beats == 1) {
1021 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Bar at %1|1 @ %2\n", current.bars, current_frame));
1022 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), current.bars, 1));
1023 bar_start_frame = current_frame;
1025 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Beat at %1|%2 @ %3\n", current.bars, current.beats, current_frame));
1026 _map.push_back (BBTPoint (*meter, *tempo, (framepos_t) llrint(current_frame), current.bars, current.beats));
1029 if (next_metric == metrics.end()) {
1030 /* no more metrics - we've timestamped them all, stop here */
1031 if (end == max_framepos) {
1032 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("stop extending map now that we've reach the end @ %1|%2 = %3\n",
1033 current.bars, current.beats, current_frame));
1041 TempoMap::metric_at (framepos_t frame) const
1043 Glib::RWLock::ReaderLock lm (lock);
1044 TempoMetric m (first_meter(), first_tempo());
1048 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1049 at something, because we insert the default tempo and meter during
1050 TempoMap construction.
1052 now see if we can find better candidates.
1055 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1057 if ((*i)->frame() > frame) {
1061 if ((tempo = dynamic_cast<const TempoSection*>(*i)) != 0) {
1062 m.set_tempo (*tempo);
1063 } else if ((meter = dynamic_cast<const MeterSection*>(*i)) != 0) {
1064 m.set_meter (*meter);
1067 m.set_frame ((*i)->frame ());
1068 m.set_start ((*i)->start ());
1075 TempoMap::metric_at (BBT_Time bbt) const
1077 Glib::RWLock::ReaderLock lm (lock);
1078 TempoMetric m (first_meter(), first_tempo());
1082 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1083 at something, because we insert the default tempo and meter during
1084 TempoMap construction.
1086 now see if we can find better candidates.
1089 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1091 BBT_Time section_start ((*i)->start());
1093 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1097 if ((tempo = dynamic_cast<const TempoSection*>(*i)) != 0) {
1098 m.set_tempo (*tempo);
1099 } else if ((meter = dynamic_cast<const MeterSection*>(*i)) != 0) {
1100 m.set_meter (*meter);
1103 m.set_frame ((*i)->frame ());
1104 m.set_start (section_start);
1111 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt)
1113 require_map_to (frame);
1115 Glib::RWLock::ReaderLock lm (lock);
1121 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1125 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1129 TempoMap::bbt_time_rt (framepos_t frame, BBT_Time& bbt)
1131 Glib::RWLock::ReaderLock lm (lock, Glib::TRY_LOCK);
1134 throw std::logic_error ("TempoMap::bbt_time_rt() could not lock tempo map");
1137 if (_map.empty() || _map.back().frame < frame) {
1138 throw std::logic_error (string_compose ("map not long enough to reach %1", frame));
1141 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1145 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt, const BBTPointList::const_iterator& i)
1147 /* CALLER MUST HOLD READ LOCK */
1149 bbt.bars = (*i).bar;
1150 bbt.beats = (*i).beat;
1152 if ((*i).frame == frame) {
1155 bbt.ticks = llrint (((frame - (*i).frame) / (*i).tempo->frames_per_beat(_frame_rate)) *
1156 BBT_Time::ticks_per_beat);
1161 TempoMap::frame_time (const BBT_Time& bbt)
1164 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
1168 if (bbt.beats < 1) {
1169 throw std::logic_error ("beats are counted from one");
1172 require_map_to (bbt);
1174 Glib::RWLock::ReaderLock lm (lock);
1176 BBTPointList::const_iterator s = bbt_before_or_at (BBT_Time (1, 1, 0));
1177 BBTPointList::const_iterator e = bbt_before_or_at (BBT_Time (bbt.bars, bbt.beats, 0));
1179 if (bbt.ticks != 0) {
1180 return ((*e).frame - (*s).frame) +
1181 llrint ((*e).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat));
1183 return ((*e).frame - (*s).frame);
1188 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
1191 bbt_time (pos, when);
1193 Glib::RWLock::ReaderLock lm (lock);
1194 return bbt_duration_at_unlocked (when, bbt, dir);
1198 TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int dir)
1200 if (bbt.bars == 0 && bbt.beats == 0 && bbt.ticks == 0) {
1204 /* round back to the previous precise beat */
1205 BBTPointList::const_iterator wi = bbt_before_or_at (BBT_Time (when.bars, when.beats, 0));
1206 BBTPointList::const_iterator start (wi);
1207 double tick_frames = 0;
1209 assert (wi != _map.end());
1211 /* compute how much rounding we did because of non-zero ticks */
1213 if (when.ticks != 0) {
1214 tick_frames = (*wi).tempo->frames_per_beat (_frame_rate) * (when.ticks/BBT_Time::ticks_per_beat);
1220 while (wi != _map.end() && bars < bbt.bars) {
1222 if ((*wi).is_bar()) {
1226 assert (wi != _map.end());
1228 while (wi != _map.end() && beats < bbt.beats) {
1232 assert (wi != _map.end());
1234 /* add any additional frames related to ticks in the added value */
1236 if (bbt.ticks != 0) {
1237 tick_frames += (*wi).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat);
1240 return ((*wi).frame - (*start).frame) + llrint (tick_frames);
1244 TempoMap::round_to_bar (framepos_t fr, int dir)
1246 return round_to_type (fr, dir, Bar);
1250 TempoMap::round_to_beat (framepos_t fr, int dir)
1252 return round_to_type (fr, dir, Beat);
1256 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, int dir)
1258 require_map_to (fr);
1260 Glib::RWLock::ReaderLock lm (lock);
1261 BBTPointList::const_iterator i = bbt_before_or_at (fr);
1263 uint32_t ticks_one_subdivisions_worth;
1264 uint32_t difference;
1266 bbt_time (fr, the_beat, i);
1268 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("round %1 to nearest 1/%2 beat, before-or-at = %3 @ %4|%5 precise = %6\n",
1269 fr, sub_num, (*i).frame, (*i).bar, (*i).beat, the_beat));
1271 ticks_one_subdivisions_worth = (uint32_t)BBT_Time::ticks_per_beat / sub_num;
1275 /* round to next (even if we're on a subdivision */
1277 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1280 /* right on the subdivision, so the difference is just the subdivision ticks */
1281 the_beat.ticks += ticks_one_subdivisions_worth;
1284 /* not on subdivision, compute distance to next subdivision */
1286 the_beat.ticks += ticks_one_subdivisions_worth - mod;
1289 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1290 assert (i != _map.end());
1292 assert (i != _map.end());
1293 the_beat.ticks -= BBT_Time::ticks_per_beat;
1297 } else if (dir < 0) {
1299 /* round to previous (even if we're on a subdivision) */
1301 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1304 /* right on the subdivision, so the difference is just the subdivision ticks */
1305 difference = ticks_one_subdivisions_worth;
1307 /* not on subdivision, compute distance to previous subdivision, which
1308 is just the modulus.
1314 if (the_beat.ticks < difference) {
1315 if (i == _map.begin()) {
1316 /* can't go backwards from wherever pos is, so just return it */
1320 the_beat.ticks = BBT_Time::ticks_per_beat - the_beat.ticks;
1322 the_beat.ticks -= difference;
1326 /* round to nearest */
1330 /* compute the distance to the previous and next subdivision */
1332 if ((rem = fmod ((double) the_beat.ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
1334 /* closer to the next subdivision, so shift forward */
1336 the_beat.ticks = lrint (the_beat.ticks + (ticks_one_subdivisions_worth - rem));
1338 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", the_beat.ticks));
1340 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1341 assert (i != _map.end());
1343 assert (i != _map.end());
1344 the_beat.ticks -= BBT_Time::ticks_per_beat;
1345 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", the_beat));
1348 } else if (rem > 0) {
1350 /* closer to previous subdivision, so shift backward */
1352 if (rem > the_beat.ticks) {
1353 if (i == _map.begin()) {
1354 /* can't go backwards past zero, so ... */
1357 /* step back to previous beat */
1359 the_beat.ticks = lrint (BBT_Time::ticks_per_beat - rem);
1360 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", the_beat));
1362 the_beat.ticks = lrint (the_beat.ticks - rem);
1363 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", the_beat.ticks));
1366 /* on the subdivision, do nothing */
1370 return (*i).frame + (the_beat.ticks/BBT_Time::ticks_per_beat) *
1371 (*i).tempo->frames_per_beat (_frame_rate);
1375 TempoMap::round_to_type (framepos_t frame, int dir, BBTPointType type)
1377 require_map_to (frame);
1379 Glib::RWLock::ReaderLock lm (lock);
1380 BBTPointList::const_iterator fi;
1383 fi = bbt_after_or_at (frame);
1385 fi = bbt_before_or_at (frame);
1388 assert (fi != _map.end());
1390 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("round from %1 (%3|%4 @ %5) to %6 in direction %2\n", frame, dir, (*fi).bar, (*fi).beat, (*fi).frame,
1391 (type == Bar ? "bar" : "beat")));
1396 /* find bar previous to 'frame' */
1398 if (fi == _map.begin()) {
1402 if ((*fi).is_bar() && (*fi).frame == frame) {
1406 while (!(*fi).is_bar()) {
1407 if (fi == _map.begin()) {
1412 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to bar: map iter at %1|%2 %3, return\n",
1413 (*fi).bar, (*fi).beat, (*fi).frame));
1416 } else if (dir > 0) {
1418 /* find bar following 'frame' */
1420 if ((*fi).is_bar() && (*fi).frame == frame) {
1424 while (!(*fi).is_bar()) {
1426 if (fi == _map.end()) {
1432 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to bar: map iter at %1|%2 %3, return\n",
1433 (*fi).bar, (*fi).beat, (*fi).frame));
1438 /* true rounding: find nearest bar */
1440 BBTPointList::const_iterator prev = fi;
1441 BBTPointList::const_iterator next = fi;
1443 if ((*fi).frame == frame) {
1447 while ((*prev).beat != 1) {
1448 if (prev == _map.begin()) {
1454 while ((next != _map.end()) && (*next).beat != 1) {
1458 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1459 return (*prev).frame;
1461 return (*next).frame;
1471 if (fi == _map.begin()) {
1475 if ((*fi).frame >= frame) {
1476 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step back\n");
1479 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1480 (*fi).bar, (*fi).beat, (*fi).frame));
1482 } else if (dir > 0) {
1483 if ((*fi).frame <= frame) {
1484 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step forward\n");
1487 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1488 (*fi).bar, (*fi).beat, (*fi).frame));
1491 /* find beat nearest to frame */
1492 if ((*fi).frame == frame) {
1496 BBTPointList::const_iterator prev = fi;
1497 BBTPointList::const_iterator next = fi;
1499 /* fi is already the beat before_or_at frame, and
1500 we've just established that its not at frame, so its
1501 the beat before frame.
1505 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1506 return (*prev).frame;
1508 return (*next).frame;
1520 TempoMap::get_grid (TempoMap::BBTPointList::const_iterator& begin,
1521 TempoMap::BBTPointList::const_iterator& end,
1522 framepos_t lower, framepos_t upper)
1525 Glib::RWLock::WriterLock lm (lock);
1526 if (_map.empty() || (_map.back().frame < upper)) {
1527 recompute_map (false, upper);
1531 begin = lower_bound (_map.begin(), _map.end(), lower);
1532 end = upper_bound (_map.begin(), _map.end(), upper);
1536 TempoMap::tempo_section_at (framepos_t frame) const
1538 Glib::RWLock::ReaderLock lm (lock);
1539 Metrics::const_iterator i;
1540 TempoSection* prev = 0;
1542 for (i = metrics.begin(); i != metrics.end(); ++i) {
1545 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1547 if ((*i)->frame() > frame) {
1563 TempoMap::tempo_at (framepos_t frame) const
1565 TempoMetric m (metric_at (frame));
1571 TempoMap::meter_at (framepos_t frame) const
1573 TempoMetric m (metric_at (frame));
1578 TempoMap::get_state ()
1580 Metrics::const_iterator i;
1581 XMLNode *root = new XMLNode ("TempoMap");
1584 Glib::RWLock::ReaderLock lm (lock);
1585 for (i = metrics.begin(); i != metrics.end(); ++i) {
1586 root->add_child_nocopy ((*i)->get_state());
1594 TempoMap::set_state (const XMLNode& node, int /*version*/)
1597 Glib::RWLock::WriterLock lm (lock);
1600 XMLNodeConstIterator niter;
1601 Metrics old_metrics (metrics);
1602 MeterSection* last_meter = 0;
1605 nlist = node.children();
1607 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1608 XMLNode* child = *niter;
1610 if (child->name() == TempoSection::xml_state_node_name) {
1613 TempoSection* ts = new TempoSection (*child);
1614 metrics.push_back (ts);
1616 if (ts->bar_offset() < 0.0) {
1618 ts->update_bar_offset_from_bbt (*last_meter);
1623 catch (failed_constructor& err){
1624 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1625 metrics = old_metrics;
1629 } else if (child->name() == MeterSection::xml_state_node_name) {
1632 MeterSection* ms = new MeterSection (*child);
1633 metrics.push_back (ms);
1637 catch (failed_constructor& err) {
1638 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1639 metrics = old_metrics;
1645 if (niter == nlist.end()) {
1646 MetricSectionSorter cmp;
1650 recompute_map (true, -1);
1653 PropertyChanged (PropertyChange ());
1659 TempoMap::dump (std::ostream& o) const
1661 Glib::RWLock::ReaderLock lm (lock, Glib::TRY_LOCK);
1662 const MeterSection* m;
1663 const TempoSection* t;
1665 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1667 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
1668 o << "Tempo @ " << *i << " (Bar-offset: " << t->bar_offset() << ") " << t->beats_per_minute() << " BPM (pulse = 1/" << t->note_type() << ") at " << t->start() << " frame= " << t->frame() << " (movable? "
1669 << t->movable() << ')' << endl;
1670 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
1671 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->start() << " frame= " << m->frame()
1672 << " (movable? " << m->movable() << ')' << endl;
1678 TempoMap::n_tempos() const
1680 Glib::RWLock::ReaderLock lm (lock);
1683 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1684 if (dynamic_cast<const TempoSection*>(*i) != 0) {
1693 TempoMap::n_meters() const
1695 Glib::RWLock::ReaderLock lm (lock);
1698 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1699 if (dynamic_cast<const MeterSection*>(*i) != 0) {
1708 TempoMap::insert_time (framepos_t where, framecnt_t amount)
1711 Glib::RWLock::WriterLock lm (lock);
1712 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
1713 if ((*i)->frame() >= where && (*i)->movable ()) {
1714 (*i)->set_frame ((*i)->frame() + amount);
1718 /* now reset the BBT time of all metrics, based on their new
1719 * audio time. This is the only place where we do this reverse
1723 Metrics::iterator i;
1724 const MeterSection* meter;
1725 const TempoSection* tempo;
1729 meter = &first_meter ();
1730 tempo = &first_tempo ();
1735 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
1738 MetricSection* prev = 0;
1740 for (i = metrics.begin(); i != metrics.end(); ++i) {
1743 TempoMetric metric (*meter, *tempo);
1746 metric.set_start (prev->start());
1747 metric.set_frame (prev->frame());
1749 // metric will be at frames=0 bbt=1|1|0 by default
1750 // which is correct for our purpose
1753 BBTPointList::const_iterator bi = bbt_before_or_at ((*i)->frame());
1754 bbt_time ((*i)->frame(), bbt, bi);
1756 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
1762 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
1763 /* round up to next beat */
1769 if (bbt.beats != 1) {
1770 /* round up to next bar */
1776 // cerr << bbt << endl;
1778 (*i)->set_start (bbt);
1780 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1782 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1783 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
1785 // cerr << "NEW METER, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1787 fatal << _("programming error: unhandled MetricSection type") << endmsg;
1794 recompute_map (true);
1798 PropertyChanged (PropertyChange ());
1801 /** Add some (fractional) beats to a session frame position, and return the result in frames.
1802 * pos can be -ve, if required.
1805 TempoMap::framepos_plus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1807 Glib::RWLock::ReaderLock lm (lock);
1808 Metrics::const_iterator next_tempo;
1809 const TempoSection* tempo;
1811 /* Find the starting tempo metric */
1813 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
1815 const TempoSection* t;
1817 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
1819 /* This is a bit of a hack, but pos could be -ve, and if it is,
1820 we consider the initial metric changes (at time 0) to actually
1821 be in effect at pos.
1824 framepos_t f = (*next_tempo)->frame ();
1826 if (pos < 0 && f == 0) {
1840 tempo -> the Tempo for "pos"
1841 next_tempo -> first tempo after "pos", possibly metrics.end()
1844 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 plus %2 beats, start with tempo = %3 @ %4\n",
1845 pos, beats, *((Tempo*)tempo), tempo->frame()));
1849 /* Distance to the end of this section in frames */
1850 framecnt_t distance_frames = (next_tempo == metrics.end() ? max_framepos : ((*next_tempo)->frame() - pos));
1852 /* Distance to the end in beats */
1853 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1855 /* Amount to subtract this time */
1856 double const delta = min (distance_beats, beats);
1858 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1859 (next_tempo == metrics.end() ? max_framepos : (*next_tempo)->frame()),
1860 distance_frames, distance_beats));
1864 pos += delta * tempo->frames_per_beat (_frame_rate);
1866 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left\n", pos, beats));
1868 /* step forwards to next tempo section */
1870 if (next_tempo != metrics.end()) {
1872 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
1874 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1875 *((Tempo*)tempo), tempo->frame(),
1876 tempo->frames_per_beat (_frame_rate)));
1878 while (next_tempo != metrics.end ()) {
1882 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
1892 /** Subtract some (fractional) beats to a frame position, and return the result in frames */
1894 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1896 Glib::RWLock::ReaderLock lm (lock);
1897 Metrics::const_reverse_iterator prev_tempo;
1898 const TempoSection* tempo = 0;
1900 /* Find the starting tempo metric */
1902 for (prev_tempo = metrics.rbegin(); prev_tempo != metrics.rend(); ++prev_tempo) {
1904 const TempoSection* t;
1906 if ((t = dynamic_cast<const TempoSection*>(*prev_tempo)) != 0) {
1908 /* This is a bit of a hack, but pos could be -ve, and if it is,
1909 we consider the initial metric changes (at time 0) to actually
1910 be in effect at pos.
1913 framepos_t f = (*prev_tempo)->frame ();
1915 if (pos < 0 && f == 0) {
1919 /* this is slightly more complex than the forward case
1920 because we reach the tempo in effect at pos after
1921 passing through pos (rather before, as in the
1922 forward case). having done that, we then need to
1923 keep going to get the previous tempo (or
1929 /* first tempo with position at or
1933 } else if (f < pos) {
1934 /* some other tempo section that
1935 is even earlier than 'tempo'
1943 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 minus %2 beats, start with tempo = %3 @ %4 prev at beg? %5\n",
1944 pos, beats, *((Tempo*)tempo), tempo->frame(),
1945 prev_tempo == metrics.rend()));
1949 tempo -> the Tempo for "pos"
1950 prev_tempo -> the first metric before "pos", possibly metrics.rend()
1955 /* Distance to the start of this section in frames */
1956 framecnt_t distance_frames = (pos - tempo->frame());
1958 /* Distance to the start in beats */
1959 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1961 /* Amount to subtract this time */
1962 double const sub = min (distance_beats, beats);
1964 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1965 tempo->frame(), distance_frames, distance_beats));
1969 pos -= sub * tempo->frames_per_beat (_frame_rate);
1971 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left, prev at end ? %3\n", pos, beats,
1972 (prev_tempo == metrics.rend())));
1974 /* step backwards to prior TempoSection */
1976 if (prev_tempo != metrics.rend()) {
1978 tempo = dynamic_cast<const TempoSection*>(*prev_tempo);
1980 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1981 *((Tempo*)tempo), tempo->frame(),
1982 tempo->frames_per_beat (_frame_rate)));
1984 while (prev_tempo != metrics.rend ()) {
1988 if (prev_tempo != metrics.rend() && dynamic_cast<const TempoSection*>(*prev_tempo) != 0) {
1993 pos -= llrint (beats * tempo->frames_per_beat (_frame_rate));
2001 /** Add the BBT interval op to pos and return the result */
2003 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
2005 Glib::RWLock::ReaderLock lm (lock);
2006 Metrics::const_iterator i;
2007 const MeterSection* meter;
2008 const MeterSection* m;
2009 const TempoSection* tempo;
2010 const TempoSection* t;
2011 double frames_per_beat;
2012 framepos_t effective_pos = max (pos, (framepos_t) 0);
2014 meter = &first_meter ();
2015 tempo = &first_tempo ();
2020 /* find the starting metrics for tempo & meter */
2022 for (i = metrics.begin(); i != metrics.end(); ++i) {
2024 if ((*i)->frame() > effective_pos) {
2028 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2030 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2037 meter -> the Meter for "pos"
2038 tempo -> the Tempo for "pos"
2039 i -> for first new metric after "pos", possibly metrics.end()
2042 /* now comes the complicated part. we have to add one beat a time,
2043 checking for a new metric on every beat.
2046 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2055 /* check if we need to use a new metric section: has adding frames moved us
2056 to or after the start of the next metric section? in which case, use it.
2059 if (i != metrics.end()) {
2060 if ((*i)->frame() <= pos) {
2062 /* about to change tempo or meter, so add the
2063 * number of frames for the bars we've just
2064 * traversed before we change the
2065 * frames_per_beat value.
2068 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2071 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2073 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2077 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2084 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2090 /* given the current meter, have we gone past the end of the bar ? */
2095 /* check if we need to use a new metric section: has adding frames moved us
2096 to or after the start of the next metric section? in which case, use it.
2099 if (i != metrics.end()) {
2100 if ((*i)->frame() <= pos) {
2102 /* about to change tempo or meter, so add the
2103 * number of frames for the beats we've just
2104 * traversed before we change the
2105 * frames_per_beat value.
2108 pos += llrint (beats * frames_per_beat);
2111 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2113 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2117 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2122 pos += llrint (beats * frames_per_beat);
2125 if (op.ticks >= BBT_Time::ticks_per_beat) {
2126 pos += llrint (frames_per_beat + /* extra beat */
2127 (frames_per_beat * ((op.ticks % (uint32_t) BBT_Time::ticks_per_beat) /
2128 (double) BBT_Time::ticks_per_beat)));
2130 pos += llrint (frames_per_beat * (op.ticks / (double) BBT_Time::ticks_per_beat));
2137 /** Count the number of beats that are equivalent to distance when going forward,
2141 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
2143 Glib::RWLock::ReaderLock lm (lock);
2144 Metrics::const_iterator next_tempo;
2145 const TempoSection* tempo = 0;
2146 framepos_t effective_pos = max (pos, (framepos_t) 0);
2148 /* Find the relevant initial tempo metric */
2150 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
2152 const TempoSection* t;
2154 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
2156 if ((*next_tempo)->frame() > effective_pos) {
2166 tempo -> the Tempo for "pos"
2167 next_tempo -> the next tempo after "pos", possibly metrics.end()
2172 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 walk by %2 frames, start with tempo = %3 @ %4\n",
2173 pos, distance, *((Tempo*)tempo), tempo->frame()));
2175 Evoral::MusicalTime beats = 0;
2179 /* End of this section */
2180 framepos_t const end = ((next_tempo == metrics.end()) ? max_framepos : (*next_tempo)->frame ());
2182 /* Distance to the end in frames */
2183 framecnt_t const distance_to_end = end - pos;
2185 /* Amount to subtract this time */
2186 double const sub = min (distance, distance_to_end);
2188 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("to reach end at %1 (end ? %2), distance= %3 sub=%4\n", end, (next_tempo == metrics.end()),
2189 distance_to_end, sub));
2195 beats += sub / tempo->frames_per_beat (_frame_rate);
2197 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1, beats = %2 distance left %3\n",
2198 pos, beats, distance));
2200 /* Move on if there's anything to move to */
2202 if (next_tempo != metrics.end()) {
2204 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
2206 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
2207 *((Tempo*)tempo), tempo->frame(),
2208 tempo->frames_per_beat (_frame_rate)));
2210 while (next_tempo != metrics.end ()) {
2214 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
2219 if (next_tempo == metrics.end()) {
2220 DEBUG_TRACE (DEBUG::TempoMath, "no more tempo sections\n");
2222 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("next tempo section is %1 @ %2\n",
2223 **next_tempo, (*next_tempo)->frame()));
2233 TempoMap::BBTPointList::const_iterator
2234 TempoMap::bbt_before_or_at (framepos_t pos)
2236 /* CALLER MUST HOLD READ LOCK */
2238 BBTPointList::const_iterator i;
2241 /* not really correct, but we should catch pos < 0 at a higher
2244 return _map.begin();
2247 i = lower_bound (_map.begin(), _map.end(), pos);
2248 assert (i != _map.end());
2249 if ((*i).frame > pos) {
2250 assert (i != _map.begin());
2257 bool operator() (const BBT_Time& a, const BBT_Time& b) {
2262 TempoMap::BBTPointList::const_iterator
2263 TempoMap::bbt_before_or_at (const BBT_Time& bbt)
2265 BBTPointList::const_iterator i;
2268 i = lower_bound (_map.begin(), _map.end(), bbt, cmp);
2269 assert (i != _map.end());
2270 if ((*i).bar > bbt.bars || (*i).beat > bbt.beats) {
2271 assert (i != _map.begin());
2277 TempoMap::BBTPointList::const_iterator
2278 TempoMap::bbt_after_or_at (framepos_t pos)
2280 /* CALLER MUST HOLD READ LOCK */
2282 BBTPointList::const_iterator i;
2284 if (_map.back().frame == pos) {
2286 assert (i != _map.begin());
2291 i = upper_bound (_map.begin(), _map.end(), pos);
2292 assert (i != _map.end());
2297 operator<< (std::ostream& o, const Meter& m) {
2298 return o << m.divisions_per_bar() << '/' << m.note_divisor();
2302 operator<< (std::ostream& o, const Tempo& t) {
2303 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
2307 operator<< (std::ostream& o, const MetricSection& section) {
2309 o << "MetricSection @ " << section.frame() << " aka " << section.start() << ' ';
2311 const TempoSection* ts;
2312 const MeterSection* ms;
2314 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
2315 o << *((Tempo*) ts);
2316 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
2317 o << *((Meter*) ms);