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>
27 #include "pbd/xml++.h"
28 #include "evoral/types.hpp"
29 #include "ardour/debug.h"
30 #include "ardour/tempo.h"
36 using namespace ARDOUR;
39 using Timecode::BBT_Time;
41 /* _default tempo is 4/4 qtr=120 */
43 Meter TempoMap::_default_meter (4.0, 4.0);
44 Tempo TempoMap::_default_tempo (120.0);
46 /***********************************************************************/
49 Meter::frames_per_grid (const Tempo& tempo, framecnt_t sr) const
51 /* This is tempo- and meter-sensitive. The number it returns
52 is based on the interval between any two lines in the
53 grid that is constructed from tempo and meter sections.
55 The return value IS NOT interpretable in terms of "beats".
58 return (60.0 * sr) / (tempo.beats_per_minute() * (_note_type/tempo.note_type()));
62 Meter::frames_per_bar (const Tempo& tempo, framecnt_t sr) const
64 return frames_per_grid (tempo, sr) * _divisions_per_bar;
67 /***********************************************************************/
69 const string TempoSection::xml_state_node_name = "Tempo";
71 TempoSection::TempoSection (const XMLNode& node)
72 : MetricSection (BBT_Time()), Tempo (TempoMap::default_tempo())
74 const XMLProperty *prop;
76 LocaleGuard lg (X_("POSIX"));
78 if ((prop = node.property ("start")) == 0) {
79 error << _("TempoSection XML node has no \"start\" property") << endmsg;
80 throw failed_constructor();
83 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
87 error << _("TempoSection XML node has an illegal \"start\" value") << endmsg;
88 throw failed_constructor();
93 if ((prop = node.property ("beats-per-minute")) == 0) {
94 error << _("TempoSection XML node has no \"beats-per-minute\" property") << endmsg;
95 throw failed_constructor();
98 if (sscanf (prop->value().c_str(), "%lf", &_beats_per_minute) != 1 || _beats_per_minute < 0.0) {
99 error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg;
100 throw failed_constructor();
103 if ((prop = node.property ("note-type")) == 0) {
104 /* older session, make note type be quarter by default */
107 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 1.0) {
108 error << _("TempoSection XML node has an illegal \"note-type\" value") << endmsg;
109 throw failed_constructor();
113 if ((prop = node.property ("movable")) == 0) {
114 error << _("TempoSection XML node has no \"movable\" property") << endmsg;
115 throw failed_constructor();
118 set_movable (string_is_affirmative (prop->value()));
120 if ((prop = node.property ("bar-offset")) == 0) {
123 if (sscanf (prop->value().c_str(), "%lf", &_bar_offset) != 1 || _bar_offset < 0.0) {
124 error << _("TempoSection XML node has an illegal \"bar-offset\" value") << endmsg;
125 throw failed_constructor();
131 TempoSection::get_state() const
133 XMLNode *root = new XMLNode (xml_state_node_name);
135 LocaleGuard lg (X_("POSIX"));
137 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
141 root->add_property ("start", buf);
142 snprintf (buf, sizeof (buf), "%f", _beats_per_minute);
143 root->add_property ("beats-per-minute", buf);
144 snprintf (buf, sizeof (buf), "%f", _note_type);
145 root->add_property ("note-type", buf);
146 // snprintf (buf, sizeof (buf), "%f", _bar_offset);
147 // root->add_property ("bar-offset", buf);
148 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
149 root->add_property ("movable", buf);
156 TempoSection::update_bar_offset_from_bbt (const Meter& m)
158 _bar_offset = ((start().beats - 1) * BBT_Time::ticks_per_beat + start().ticks) /
159 (m.divisions_per_bar() * BBT_Time::ticks_per_beat);
161 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Tempo set bar offset to %1 from %2 w/%3\n", _bar_offset, start(), m.divisions_per_bar()));
165 TempoSection::update_bbt_time_from_bar_offset (const Meter& meter)
169 if (_bar_offset < 0.0) {
174 new_start.bars = start().bars;
176 double ticks = BBT_Time::ticks_per_beat * meter.divisions_per_bar() * _bar_offset;
177 new_start.beats = (uint32_t) floor (ticks/BBT_Time::ticks_per_beat);
178 new_start.ticks = 0; /* (uint32_t) fmod (ticks, BBT_Time::ticks_per_beat); */
180 /* remember the 1-based counting properties of beats */
181 new_start.beats += 1;
183 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("from bar offset %1 and dpb %2, ticks = %3->%4 beats = %5\n",
184 _bar_offset, meter.divisions_per_bar(), ticks, new_start.ticks, new_start.beats));
186 set_start (new_start);
189 /***********************************************************************/
191 const string MeterSection::xml_state_node_name = "Meter";
193 MeterSection::MeterSection (const XMLNode& node)
194 : MetricSection (BBT_Time()), Meter (TempoMap::default_meter())
196 const XMLProperty *prop;
198 LocaleGuard lg (X_("POSIX"));
200 if ((prop = node.property ("start")) == 0) {
201 error << _("MeterSection XML node has no \"start\" property") << endmsg;
202 throw failed_constructor();
205 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
209 error << _("MeterSection XML node has an illegal \"start\" value") << endmsg;
210 throw failed_constructor();
215 /* beats-per-bar is old; divisions-per-bar is new */
217 if ((prop = node.property ("divisions-per-bar")) == 0) {
218 if ((prop = node.property ("beats-per-bar")) == 0) {
219 error << _("MeterSection XML node has no \"beats-per-bar\" or \"divisions-per-bar\" property") << endmsg;
220 throw failed_constructor();
224 if (sscanf (prop->value().c_str(), "%lf", &_divisions_per_bar) != 1 || _divisions_per_bar < 0.0) {
225 error << _("MeterSection XML node has an illegal \"beats-per-bar\" or \"divisions-per-bar\" value") << endmsg;
226 throw failed_constructor();
229 if ((prop = node.property ("note-type")) == 0) {
230 error << _("MeterSection XML node has no \"note-type\" property") << endmsg;
231 throw failed_constructor();
234 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) {
235 error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg;
236 throw failed_constructor();
239 if ((prop = node.property ("movable")) == 0) {
240 error << _("MeterSection XML node has no \"movable\" property") << endmsg;
241 throw failed_constructor();
244 set_movable (string_is_affirmative (prop->value()));
248 MeterSection::get_state() const
250 XMLNode *root = new XMLNode (xml_state_node_name);
252 LocaleGuard lg (X_("POSIX"));
254 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
258 root->add_property ("start", buf);
259 snprintf (buf, sizeof (buf), "%f", _note_type);
260 root->add_property ("note-type", buf);
261 snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
262 root->add_property ("divisions-per-bar", buf);
263 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
264 root->add_property ("movable", buf);
269 /***********************************************************************/
271 struct MetricSectionSorter {
272 bool operator() (const MetricSection* a, const MetricSection* b) {
273 return a->start() < b->start();
277 TempoMap::TempoMap (framecnt_t fr)
286 TempoSection *t = new TempoSection (start, _default_tempo.beats_per_minute(), _default_tempo.note_type());
287 MeterSection *m = new MeterSection (start, _default_meter.divisions_per_bar(), _default_meter.note_divisor());
289 t->set_movable (false);
290 m->set_movable (false);
292 /* note: frame time is correct (zero) for both of these */
294 metrics.push_back (t);
295 metrics.push_back (m);
298 TempoMap::~TempoMap ()
303 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
305 bool removed = false;
308 Glib::Threads::RWLock::WriterLock lm (lock);
311 for (i = metrics.begin(); i != metrics.end(); ++i) {
312 if (dynamic_cast<TempoSection*> (*i) != 0) {
313 if (tempo.frame() == (*i)->frame()) {
314 if ((*i)->movable()) {
323 if (removed && complete_operation) {
324 recompute_map (false);
328 if (removed && complete_operation) {
329 PropertyChanged (PropertyChange ());
334 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
336 bool removed = false;
339 Glib::Threads::RWLock::WriterLock lm (lock);
342 for (i = metrics.begin(); i != metrics.end(); ++i) {
343 if (dynamic_cast<MeterSection*> (*i) != 0) {
344 if (tempo.frame() == (*i)->frame()) {
345 if ((*i)->movable()) {
354 if (removed && complete_operation) {
355 recompute_map (true);
359 if (removed && complete_operation) {
360 PropertyChanged (PropertyChange ());
365 TempoMap::do_insert (MetricSection* section)
367 bool need_add = true;
369 assert (section->start().ticks == 0);
371 /* we only allow new meters to be inserted on beat 1 of an existing
375 if (dynamic_cast<MeterSection*>(section)) {
377 /* we need to (potentially) update the BBT times of tempo
378 sections based on this new meter.
381 if ((section->start().beats != 1) || (section->start().ticks != 0)) {
383 BBT_Time corrected = section->start();
387 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
388 section->start(), corrected) << endmsg;
390 section->set_start (corrected);
396 /* Look for any existing MetricSection that is of the same type and
397 in the same bar as the new one, and remove it before adding
398 the new one. Note that this means that if we find a matching,
399 existing section, we can break out of the loop since we're
400 guaranteed that there is only one such match.
403 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
405 bool const iter_is_tempo = dynamic_cast<TempoSection*> (*i) != 0;
406 bool const insert_is_tempo = dynamic_cast<TempoSection*> (section) != 0;
408 if (iter_is_tempo && insert_is_tempo) {
412 if ((*i)->start().bars == section->start().bars &&
413 (*i)->start().beats == section->start().beats) {
415 if (!(*i)->movable()) {
417 /* can't (re)move this section, so overwrite
418 * its data content (but not its properties as
422 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(section));
430 } else if (!iter_is_tempo && !insert_is_tempo) {
434 if ((*i)->start().bars == section->start().bars) {
436 if (!(*i)->movable()) {
438 /* can't (re)move this section, so overwrite
439 * its data content (but not its properties as
443 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(section));
453 /* non-matching types, so we don't care */
457 /* Add the given MetricSection, if we didn't just reset an existing
465 for (i = metrics.begin(); i != metrics.end(); ++i) {
466 if ((*i)->start() > section->start()) {
471 metrics.insert (i, section);
476 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const BBT_Time& where)
478 const TempoSection& first (first_tempo());
480 if (ts.start() != first.start()) {
481 remove_tempo (ts, false);
482 add_tempo (tempo, where);
485 Glib::Threads::RWLock::WriterLock lm (lock);
486 /* cannot move the first tempo section */
487 *((Tempo*)&first) = tempo;
488 recompute_map (false);
492 PropertyChanged (PropertyChange ());
496 TempoMap::add_tempo (const Tempo& tempo, BBT_Time where)
499 Glib::Threads::RWLock::WriterLock lm (lock);
501 /* new tempos always start on a beat */
504 TempoSection* ts = new TempoSection (where, tempo.beats_per_minute(), tempo.note_type());
506 /* find the meter to use to set the bar offset of this
510 const Meter* meter = &first_meter();
512 /* as we start, we are *guaranteed* to have m.meter and m.tempo pointing
513 at something, because we insert the default tempo and meter during
514 TempoMap construction.
516 now see if we can find better candidates.
519 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
521 const MeterSection* m;
523 if (where < (*i)->start()) {
527 if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
532 ts->update_bar_offset_from_bbt (*meter);
538 recompute_map (false);
542 PropertyChanged (PropertyChange ());
546 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where)
548 const MeterSection& first (first_meter());
550 if (ms.start() != first.start()) {
551 remove_meter (ms, false);
552 add_meter (meter, where);
555 Glib::Threads::RWLock::WriterLock lm (lock);
556 /* cannot move the first meter section */
557 *((Meter*)&first) = meter;
558 recompute_map (true);
562 PropertyChanged (PropertyChange ());
566 TempoMap::add_meter (const Meter& meter, BBT_Time where)
569 Glib::Threads::RWLock::WriterLock lm (lock);
571 /* a new meter always starts a new bar on the first beat. so
572 round the start time appropriately. remember that
573 `where' is based on the existing tempo map, not
574 the result after we insert the new meter.
578 if (where.beats != 1) {
583 /* new meters *always* start on a beat. */
586 do_insert (new MeterSection (where, meter.divisions_per_bar(), meter.note_divisor()));
587 recompute_map (true);
592 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
597 PropertyChanged (PropertyChange ());
601 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
603 Tempo newtempo (beats_per_minute, note_type);
606 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
607 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
609 Glib::Threads::RWLock::WriterLock lm (lock);
610 *((Tempo*) t) = newtempo;
611 recompute_map (false);
613 PropertyChanged (PropertyChange ());
620 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
622 Tempo newtempo (beats_per_minute, note_type);
628 /* find the TempoSection immediately preceding "where"
631 for (first = 0, i = metrics.begin(), prev = 0; i != metrics.end(); ++i) {
633 if ((*i)->frame() > where) {
639 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
649 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
659 Glib::Threads::RWLock::WriterLock lm (lock);
660 /* cannot move the first tempo section */
661 *((Tempo*)prev) = newtempo;
662 recompute_map (false);
665 PropertyChanged (PropertyChange ());
669 TempoMap::first_meter () const
671 const MeterSection *m = 0;
673 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
674 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
679 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
685 TempoMap::first_tempo () const
687 const TempoSection *t = 0;
689 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
690 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
695 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
701 TempoMap::require_map_to (framepos_t pos)
703 Glib::Threads::RWLock::WriterLock lm (lock);
705 if (_map.empty() || _map.back().frame < pos) {
711 TempoMap::require_map_to (const BBT_Time& bbt)
713 Glib::Threads::RWLock::WriterLock lm (lock);
715 /* since we have no idea where BBT is if its off the map, see the last
716 * point in the map is past BBT, and if not add an arbitrary amount of
720 int additional_minutes = 1;
723 if (!_map.empty() && _map.back().bar >= (bbt.bars + 1)) {
726 /* add some more distance, using bigger steps each time */
727 extend_map (_map.back().frame + (_frame_rate * 60 * additional_minutes));
728 additional_minutes *= 2;
733 TempoMap::recompute_map (bool reassign_tempo_bbt, framepos_t end)
735 /* CALLER MUST HOLD WRITE LOCK */
737 MeterSection* meter = 0;
738 TempoSection* tempo = 0;
739 double current_frame;
741 Metrics::iterator next_metric;
745 /* we will actually stop once we hit
751 if (!_map.empty ()) {
752 /* never allow the map to be shortened */
753 end = max (end, _map.back().frame);
757 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
759 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
762 if ((ms = dynamic_cast<MeterSection *> (*i)) != 0) {
768 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
771 if ((ts = dynamic_cast<TempoSection *> (*i)) != 0) {
777 /* assumes that the first meter & tempo are at frame zero */
779 meter->set_frame (0);
780 tempo->set_frame (0);
782 /* assumes that the first meter & tempo are at 1|1|0 */
787 if (reassign_tempo_bbt) {
789 MeterSection* rmeter = meter;
791 DEBUG_TRACE (DEBUG::TempoMath, "\tUpdating tempo marks BBT time from bar offset\n");
793 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
798 if ((ts = dynamic_cast<TempoSection*>(*i)) != 0) {
800 /* reassign the BBT time of this tempo section
801 * based on its bar offset position.
804 ts->update_bbt_time_from_bar_offset (*rmeter);
806 } else if ((ms = dynamic_cast<MeterSection*>(*i)) != 0) {
809 fatal << _("programming error: unhandled MetricSection type") << endmsg;
815 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("start with meter = %1 tempo = %2\n", *((Meter*)meter), *((Tempo*)tempo)));
817 next_metric = metrics.begin();
818 ++next_metric; // skip meter (or tempo)
819 ++next_metric; // skip tempo (or meter)
823 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add first bar at 1|1 @ %2\n", current.bars, current_frame));
824 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), 1, 1));
827 /* silly call from Session::process() during startup
832 _extend_map (tempo, meter, next_metric, current, current_frame, end);
836 TempoMap::extend_map (framepos_t end)
838 /* CALLER MUST HOLD WRITE LOCK */
841 recompute_map (false, end);
845 BBTPointList::const_iterator i = _map.end();
846 Metrics::iterator next_metric;
850 BBT_Time last_metric_start;
852 if ((*i).tempo->frame() > (*i).meter->frame()) {
853 last_metric_start = (*i).tempo->start();
855 last_metric_start = (*i).meter->start();
858 /* find the metric immediately after the tempo + meter sections for the
859 * last point in the map
862 for (next_metric = metrics.begin(); next_metric != metrics.end(); ++next_metric) {
863 if ((*next_metric)->start() > last_metric_start) {
868 /* we cast away const here because this is the one place where we need
869 * to actually modify the frame time of each metric section.
872 _extend_map (const_cast<TempoSection*> ((*i).tempo),
873 const_cast<MeterSection*> ((*i).meter),
874 next_metric, BBT_Time ((*i).bar, (*i).beat, 0), (*i).frame, end);
878 TempoMap::_extend_map (TempoSection* tempo, MeterSection* meter,
879 Metrics::iterator next_metric,
880 BBT_Time current, framepos_t current_frame, framepos_t end)
882 /* CALLER MUST HOLD WRITE LOCK */
887 framepos_t bar_start_frame;
889 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Extend map to %1 from %2 = %3\n", end, current, current_frame));
891 if (current.beats == 1) {
892 bar_start_frame = current_frame;
897 beat_frames = meter->frames_per_grid (*tempo,_frame_rate);
899 while (current_frame < end) {
902 current_frame += beat_frames;
904 if (current.beats > meter->divisions_per_bar()) {
909 if (next_metric != metrics.end()) {
911 /* no operator >= so invert operator < */
913 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1 next metric @ %2\n", current, (*next_metric)->start()));
915 if (!(current < (*next_metric)->start())) {
918 if (((ts = dynamic_cast<TempoSection*> (*next_metric)) != 0)) {
922 /* new tempo section: if its on a beat,
923 * we don't have to do anything other
924 * than recompute various distances,
925 * done further below as we transition
926 * the next metric section.
928 * if its not on the beat, we have to
929 * compute the duration of the beat it
930 * is within, which will be different
931 * from the preceding following ones
932 * since it takes part of its duration
933 * from the preceding tempo and part
934 * from this new tempo.
937 if (tempo->start().ticks != 0) {
939 double next_beat_frames = tempo->frames_per_beat (_frame_rate);
941 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into non-beat-aligned tempo metric at %1 = %2, adjust next beat using %3\n",
942 tempo->start(), current_frame, tempo->bar_offset()));
944 /* back up to previous beat */
945 current_frame -= beat_frames;
947 /* set tempo section location
948 * based on offset from last
951 tempo->set_frame (bar_start_frame +
952 llrint ((ts->bar_offset() * meter->divisions_per_bar() * beat_frames)));
954 /* advance to the location of
955 * the new (adjusted) beat. do
956 * this by figuring out the
957 * offset within the beat that
958 * would have been there
960 * change. then stretch the
964 double offset_within_old_beat = (tempo->frame() - current_frame) / beat_frames;
966 current_frame += (offset_within_old_beat * beat_frames) + ((1.0 - offset_within_old_beat) * next_beat_frames);
968 /* next metric doesn't have to
969 * match this precisely to
972 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Adjusted last beat to %1\n", current_frame));
976 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into beat-aligned tempo metric at %1 = %2\n",
977 tempo->start(), current_frame));
978 tempo->set_frame (current_frame);
981 } else if ((ms = dynamic_cast<MeterSection*>(*next_metric)) != 0) {
985 /* new meter section: always defines the
989 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into meter section at %1 vs %2 (%3)\n",
990 meter->start(), current, current_frame));
992 assert (current.beats == 1);
994 meter->set_frame (current_frame);
997 beat_frames = meter->frames_per_grid (*tempo, _frame_rate);
999 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("New metric with beat frames = %1 dpb %2 meter %3 tempo %4\n",
1000 beat_frames, meter->divisions_per_bar(), *((Meter*)meter), *((Tempo*)tempo)));
1004 if (next_metric != metrics.end() && ((*next_metric)->start() == current)) {
1005 /* same position so go back and set this one up before advancing
1013 if (current.beats == 1) {
1014 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Bar at %1|1 @ %2\n", current.bars, current_frame));
1015 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), current.bars, 1));
1016 bar_start_frame = current_frame;
1018 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Beat at %1|%2 @ %3\n", current.bars, current.beats, current_frame));
1019 _map.push_back (BBTPoint (*meter, *tempo, (framepos_t) llrint(current_frame), current.bars, current.beats));
1022 if (next_metric == metrics.end()) {
1023 /* no more metrics - we've timestamped them all, stop here */
1024 if (end == max_framepos) {
1025 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("stop extending map now that we've reach the end @ %1|%2 = %3\n",
1026 current.bars, current.beats, current_frame));
1034 TempoMap::metric_at (framepos_t frame, Metrics::const_iterator* last) const
1036 Glib::Threads::RWLock::ReaderLock lm (lock);
1037 TempoMetric m (first_meter(), first_tempo());
1039 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1040 at something, because we insert the default tempo and meter during
1041 TempoMap construction.
1043 now see if we can find better candidates.
1046 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1048 if ((*i)->frame() > frame) {
1063 TempoMap::metric_at (BBT_Time bbt) const
1065 Glib::Threads::RWLock::ReaderLock lm (lock);
1066 TempoMetric m (first_meter(), first_tempo());
1068 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1069 at something, because we insert the default tempo and meter during
1070 TempoMap construction.
1072 now see if we can find better candidates.
1075 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1077 BBT_Time section_start ((*i)->start());
1079 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1090 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt)
1092 require_map_to (frame);
1094 Glib::Threads::RWLock::ReaderLock lm (lock);
1100 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1104 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1108 TempoMap::bbt_time_rt (framepos_t frame, BBT_Time& bbt)
1110 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
1113 throw std::logic_error ("TempoMap::bbt_time_rt() could not lock tempo map");
1116 if (_map.empty() || _map.back().frame < frame) {
1117 throw std::logic_error (string_compose ("map not long enough to reach %1", frame));
1120 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1124 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt, const BBTPointList::const_iterator& i)
1126 /* CALLER MUST HOLD READ LOCK */
1128 bbt.bars = (*i).bar;
1129 bbt.beats = (*i).beat;
1131 if ((*i).frame == frame) {
1134 bbt.ticks = llrint (((frame - (*i).frame) / (*i).tempo->frames_per_beat(_frame_rate)) *
1135 BBT_Time::ticks_per_beat);
1140 TempoMap::frame_time (const BBT_Time& bbt)
1143 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
1147 if (bbt.beats < 1) {
1148 throw std::logic_error ("beats are counted from one");
1151 require_map_to (bbt);
1153 Glib::Threads::RWLock::ReaderLock lm (lock);
1155 BBTPointList::const_iterator s = bbt_before_or_at (BBT_Time (1, 1, 0));
1156 BBTPointList::const_iterator e = bbt_before_or_at (BBT_Time (bbt.bars, bbt.beats, 0));
1158 if (bbt.ticks != 0) {
1159 return ((*e).frame - (*s).frame) +
1160 llrint ((*e).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat));
1162 return ((*e).frame - (*s).frame);
1167 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
1170 bbt_time (pos, when);
1172 Glib::Threads::RWLock::ReaderLock lm (lock);
1173 return bbt_duration_at_unlocked (when, bbt, dir);
1177 TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int /*dir*/)
1179 if (bbt.bars == 0 && bbt.beats == 0 && bbt.ticks == 0) {
1183 /* round back to the previous precise beat */
1184 BBTPointList::const_iterator wi = bbt_before_or_at (BBT_Time (when.bars, when.beats, 0));
1185 BBTPointList::const_iterator start (wi);
1187 assert (wi != _map.end());
1192 while (wi != _map.end() && bars < bbt.bars) {
1194 if ((*wi).is_bar()) {
1198 assert (wi != _map.end());
1200 while (wi != _map.end() && beats < bbt.beats) {
1204 assert (wi != _map.end());
1206 /* add any additional frames related to ticks in the added value */
1208 if (bbt.ticks != 0) {
1209 return ((*wi).frame - (*start).frame) +
1210 (*wi).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat);
1212 return ((*wi).frame - (*start).frame);
1217 TempoMap::round_to_bar (framepos_t fr, int dir)
1219 return round_to_type (fr, dir, Bar);
1223 TempoMap::round_to_beat (framepos_t fr, int dir)
1225 return round_to_type (fr, dir, Beat);
1229 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, int dir)
1231 require_map_to (fr);
1233 Glib::Threads::RWLock::ReaderLock lm (lock);
1234 BBTPointList::const_iterator i = bbt_before_or_at (fr);
1236 uint32_t ticks_one_subdivisions_worth;
1237 uint32_t difference;
1239 bbt_time (fr, the_beat, i);
1241 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("round %1 to nearest 1/%2 beat, before-or-at = %3 @ %4|%5 precise = %6\n",
1242 fr, sub_num, (*i).frame, (*i).bar, (*i).beat, the_beat));
1244 ticks_one_subdivisions_worth = (uint32_t)BBT_Time::ticks_per_beat / sub_num;
1248 /* round to next (even if we're on a subdivision */
1250 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1253 /* right on the subdivision, so the difference is just the subdivision ticks */
1254 the_beat.ticks += ticks_one_subdivisions_worth;
1257 /* not on subdivision, compute distance to next subdivision */
1259 the_beat.ticks += ticks_one_subdivisions_worth - mod;
1262 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1263 assert (i != _map.end());
1265 assert (i != _map.end());
1266 the_beat.ticks -= BBT_Time::ticks_per_beat;
1270 } else if (dir < 0) {
1272 /* round to previous (even if we're on a subdivision) */
1274 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1277 /* right on the subdivision, so the difference is just the subdivision ticks */
1278 difference = ticks_one_subdivisions_worth;
1280 /* not on subdivision, compute distance to previous subdivision, which
1281 is just the modulus.
1287 if (the_beat.ticks < difference) {
1288 if (i == _map.begin()) {
1289 /* can't go backwards from wherever pos is, so just return it */
1293 the_beat.ticks = BBT_Time::ticks_per_beat - the_beat.ticks;
1295 the_beat.ticks -= difference;
1299 /* round to nearest */
1303 /* compute the distance to the previous and next subdivision */
1305 if ((rem = fmod ((double) the_beat.ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
1307 /* closer to the next subdivision, so shift forward */
1309 the_beat.ticks = lrint (the_beat.ticks + (ticks_one_subdivisions_worth - rem));
1311 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", the_beat.ticks));
1313 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1314 assert (i != _map.end());
1316 assert (i != _map.end());
1317 the_beat.ticks -= BBT_Time::ticks_per_beat;
1318 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", the_beat));
1321 } else if (rem > 0) {
1323 /* closer to previous subdivision, so shift backward */
1325 if (rem > the_beat.ticks) {
1326 if (i == _map.begin()) {
1327 /* can't go backwards past zero, so ... */
1330 /* step back to previous beat */
1332 the_beat.ticks = lrint (BBT_Time::ticks_per_beat - rem);
1333 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", the_beat));
1335 the_beat.ticks = lrint (the_beat.ticks - rem);
1336 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", the_beat.ticks));
1339 /* on the subdivision, do nothing */
1343 return (*i).frame + (the_beat.ticks/BBT_Time::ticks_per_beat) *
1344 (*i).tempo->frames_per_beat (_frame_rate);
1348 TempoMap::round_to_type (framepos_t frame, int dir, BBTPointType type)
1350 require_map_to (frame);
1352 Glib::Threads::RWLock::ReaderLock lm (lock);
1353 BBTPointList::const_iterator fi;
1356 fi = bbt_after_or_at (frame);
1358 fi = bbt_before_or_at (frame);
1361 assert (fi != _map.end());
1363 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,
1364 (type == Bar ? "bar" : "beat")));
1369 /* find bar previous to 'frame' */
1371 if (fi == _map.begin()) {
1375 if ((*fi).is_bar() && (*fi).frame == frame) {
1379 while (!(*fi).is_bar()) {
1380 if (fi == _map.begin()) {
1385 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to bar: map iter at %1|%2 %3, return\n",
1386 (*fi).bar, (*fi).beat, (*fi).frame));
1389 } else if (dir > 0) {
1391 /* find bar following 'frame' */
1393 if ((*fi).is_bar() && (*fi).frame == frame) {
1397 while (!(*fi).is_bar()) {
1399 if (fi == _map.end()) {
1405 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to bar: map iter at %1|%2 %3, return\n",
1406 (*fi).bar, (*fi).beat, (*fi).frame));
1411 /* true rounding: find nearest bar */
1413 BBTPointList::const_iterator prev = fi;
1414 BBTPointList::const_iterator next = fi;
1416 if ((*fi).frame == frame) {
1420 while ((*prev).beat != 1) {
1421 if (prev == _map.begin()) {
1427 while ((next != _map.end()) && (*next).beat != 1) {
1431 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1432 return (*prev).frame;
1434 return (*next).frame;
1444 if (fi == _map.begin()) {
1448 if ((*fi).frame >= frame) {
1449 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step back\n");
1452 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1453 (*fi).bar, (*fi).beat, (*fi).frame));
1455 } else if (dir > 0) {
1456 if ((*fi).frame <= frame) {
1457 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step forward\n");
1460 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1461 (*fi).bar, (*fi).beat, (*fi).frame));
1464 /* find beat nearest to frame */
1465 if ((*fi).frame == frame) {
1469 BBTPointList::const_iterator prev = fi;
1470 BBTPointList::const_iterator next = fi;
1472 /* fi is already the beat before_or_at frame, and
1473 we've just established that its not at frame, so its
1474 the beat before frame.
1478 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1479 return (*prev).frame;
1481 return (*next).frame;
1493 TempoMap::get_grid (TempoMap::BBTPointList::const_iterator& begin,
1494 TempoMap::BBTPointList::const_iterator& end,
1495 framepos_t lower, framepos_t upper)
1498 Glib::Threads::RWLock::WriterLock lm (lock);
1499 if (_map.empty() || (_map.back().frame < upper)) {
1500 recompute_map (false, upper);
1504 begin = lower_bound (_map.begin(), _map.end(), lower);
1505 end = upper_bound (_map.begin(), _map.end(), upper);
1509 TempoMap::tempo_section_at (framepos_t frame) const
1511 Glib::Threads::RWLock::ReaderLock lm (lock);
1512 Metrics::const_iterator i;
1513 TempoSection* prev = 0;
1515 for (i = metrics.begin(); i != metrics.end(); ++i) {
1518 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1520 if ((*i)->frame() > frame) {
1536 TempoMap::tempo_at (framepos_t frame) const
1538 TempoMetric m (metric_at (frame));
1544 TempoMap::meter_at (framepos_t frame) const
1546 TempoMetric m (metric_at (frame));
1551 TempoMap::get_state ()
1553 Metrics::const_iterator i;
1554 XMLNode *root = new XMLNode ("TempoMap");
1557 Glib::Threads::RWLock::ReaderLock lm (lock);
1558 for (i = metrics.begin(); i != metrics.end(); ++i) {
1559 root->add_child_nocopy ((*i)->get_state());
1567 TempoMap::set_state (const XMLNode& node, int /*version*/)
1570 Glib::Threads::RWLock::WriterLock lm (lock);
1573 XMLNodeConstIterator niter;
1574 Metrics old_metrics (metrics);
1575 MeterSection* last_meter = 0;
1578 nlist = node.children();
1580 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1581 XMLNode* child = *niter;
1583 if (child->name() == TempoSection::xml_state_node_name) {
1586 TempoSection* ts = new TempoSection (*child);
1587 metrics.push_back (ts);
1589 if (ts->bar_offset() < 0.0) {
1591 ts->update_bar_offset_from_bbt (*last_meter);
1596 catch (failed_constructor& err){
1597 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1598 metrics = old_metrics;
1602 } else if (child->name() == MeterSection::xml_state_node_name) {
1605 MeterSection* ms = new MeterSection (*child);
1606 metrics.push_back (ms);
1610 catch (failed_constructor& err) {
1611 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1612 metrics = old_metrics;
1618 if (niter == nlist.end()) {
1619 MetricSectionSorter cmp;
1623 /* check for multiple tempo/meters at the same location, which
1624 ardour2 somehow allowed.
1627 Metrics::iterator prev = metrics.end();
1628 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
1629 if (prev != metrics.end()) {
1630 if (dynamic_cast<MeterSection*>(*prev) && dynamic_cast<MeterSection*>(*i)) {
1631 if ((*prev)->start() == (*i)->start()) {
1632 error << string_compose (_("Multiple meter definitions found at %1"), (*prev)->start()) << endmsg;
1635 } else if (dynamic_cast<TempoSection*>(*prev) && dynamic_cast<TempoSection*>(*i)) {
1636 if ((*prev)->start() == (*i)->start()) {
1637 error << string_compose (_("Multiple tempo definitions found at %1"), (*prev)->start()) << endmsg;
1645 recompute_map (true, -1);
1648 PropertyChanged (PropertyChange ());
1654 TempoMap::dump (std::ostream& o) const
1656 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
1657 const MeterSection* m;
1658 const TempoSection* t;
1660 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1662 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
1663 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? "
1664 << t->movable() << ')' << endl;
1665 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
1666 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->start() << " frame= " << m->frame()
1667 << " (movable? " << m->movable() << ')' << endl;
1673 TempoMap::n_tempos() const
1675 Glib::Threads::RWLock::ReaderLock lm (lock);
1678 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1679 if (dynamic_cast<const TempoSection*>(*i) != 0) {
1688 TempoMap::n_meters() const
1690 Glib::Threads::RWLock::ReaderLock lm (lock);
1693 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1694 if (dynamic_cast<const MeterSection*>(*i) != 0) {
1703 TempoMap::insert_time (framepos_t where, framecnt_t amount)
1706 Glib::Threads::RWLock::WriterLock lm (lock);
1707 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
1708 if ((*i)->frame() >= where && (*i)->movable ()) {
1709 (*i)->set_frame ((*i)->frame() + amount);
1713 /* now reset the BBT time of all metrics, based on their new
1714 * audio time. This is the only place where we do this reverse
1718 Metrics::iterator i;
1719 const MeterSection* meter;
1720 const TempoSection* tempo;
1724 meter = &first_meter ();
1725 tempo = &first_tempo ();
1730 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
1733 MetricSection* prev = 0;
1735 for (i = metrics.begin(); i != metrics.end(); ++i) {
1738 TempoMetric metric (*meter, *tempo);
1741 metric.set_start (prev->start());
1742 metric.set_frame (prev->frame());
1744 // metric will be at frames=0 bbt=1|1|0 by default
1745 // which is correct for our purpose
1748 BBTPointList::const_iterator bi = bbt_before_or_at ((*i)->frame());
1749 bbt_time ((*i)->frame(), bbt, bi);
1751 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
1757 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
1758 /* round up to next beat */
1764 if (bbt.beats != 1) {
1765 /* round up to next bar */
1771 // cerr << bbt << endl;
1773 (*i)->set_start (bbt);
1775 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1777 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1778 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
1780 // cerr << "NEW METER, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1782 fatal << _("programming error: unhandled MetricSection type") << endmsg;
1789 recompute_map (true);
1793 PropertyChanged (PropertyChange ());
1796 /** Add some (fractional) beats to a session frame position, and return the result in frames.
1797 * pos can be -ve, if required.
1800 TempoMap::framepos_plus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1802 Glib::Threads::RWLock::ReaderLock lm (lock);
1803 Metrics::const_iterator next_tempo;
1804 const TempoSection* tempo = 0;
1806 /* Find the starting tempo metric */
1808 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
1810 const TempoSection* t;
1812 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
1814 /* This is a bit of a hack, but pos could be -ve, and if it is,
1815 we consider the initial metric changes (at time 0) to actually
1816 be in effect at pos.
1819 framepos_t f = (*next_tempo)->frame ();
1821 if (pos < 0 && f == 0) {
1835 tempo -> the Tempo for "pos"
1836 next_tempo -> first tempo after "pos", possibly metrics.end()
1839 DEBUG_TRACE (DEBUG::TempoMath,
1840 string_compose ("frame %1 plus %2 beats, start with tempo = %3 @ %4\n",
1841 pos, beats, *((const Tempo*)tempo), tempo->frame()));
1845 /* Distance to the end of this section in frames */
1846 framecnt_t distance_frames = (next_tempo == metrics.end() ? max_framepos : ((*next_tempo)->frame() - pos));
1848 /* Distance to the end in beats */
1849 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1851 /* Amount to subtract this time */
1852 double const delta = min (distance_beats, beats);
1854 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1855 (next_tempo == metrics.end() ? max_framepos : (*next_tempo)->frame()),
1856 distance_frames, distance_beats));
1860 pos += delta * tempo->frames_per_beat (_frame_rate);
1862 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left\n", pos, beats));
1864 /* step forwards to next tempo section */
1866 if (next_tempo != metrics.end()) {
1868 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
1870 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1871 *((const Tempo*)tempo), tempo->frame(),
1872 tempo->frames_per_beat (_frame_rate)));
1874 while (next_tempo != metrics.end ()) {
1878 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
1888 /** Subtract some (fractional) beats from a frame position, and return the result in frames */
1890 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1892 Glib::Threads::RWLock::ReaderLock lm (lock);
1893 Metrics::const_reverse_iterator prev_tempo;
1894 const TempoSection* tempo = 0;
1896 /* Find the starting tempo metric */
1898 for (prev_tempo = metrics.rbegin(); prev_tempo != metrics.rend(); ++prev_tempo) {
1900 const TempoSection* t;
1902 if ((t = dynamic_cast<const TempoSection*>(*prev_tempo)) != 0) {
1904 /* This is a bit of a hack, but pos could be -ve, and if it is,
1905 we consider the initial metric changes (at time 0) to actually
1906 be in effect at pos.
1909 framepos_t f = (*prev_tempo)->frame ();
1911 if (pos < 0 && f == 0) {
1915 /* this is slightly more complex than the forward case
1916 because we reach the tempo in effect at pos after
1917 passing through pos (rather before, as in the
1918 forward case). having done that, we then need to
1919 keep going to get the previous tempo (or
1925 /* first tempo with position at or
1929 } else if (f < pos) {
1930 /* some other tempo section that
1931 is even earlier than 'tempo'
1939 DEBUG_TRACE (DEBUG::TempoMath,
1940 string_compose ("frame %1 minus %2 beats, start with tempo = %3 @ %4 prev at beg? %5\n",
1941 pos, beats, *((const Tempo*)tempo), tempo->frame(),
1942 prev_tempo == metrics.rend()));
1946 tempo -> the Tempo for "pos"
1947 prev_tempo -> the first metric before "pos", possibly metrics.rend()
1952 /* Distance to the start of this section in frames */
1953 framecnt_t distance_frames = (pos - tempo->frame());
1955 /* Distance to the start in beats */
1956 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1958 /* Amount to subtract this time */
1959 double const sub = min (distance_beats, beats);
1961 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1962 tempo->frame(), distance_frames, distance_beats));
1966 pos -= sub * tempo->frames_per_beat (_frame_rate);
1968 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left, prev at end ? %3\n", pos, beats,
1969 (prev_tempo == metrics.rend())));
1971 /* step backwards to prior TempoSection */
1973 if (prev_tempo != metrics.rend()) {
1975 tempo = dynamic_cast<const TempoSection*>(*prev_tempo);
1977 DEBUG_TRACE (DEBUG::TempoMath,
1978 string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1979 *((const Tempo*)tempo), tempo->frame(),
1980 tempo->frames_per_beat (_frame_rate)));
1982 while (prev_tempo != metrics.rend ()) {
1986 if (prev_tempo != metrics.rend() && dynamic_cast<const TempoSection*>(*prev_tempo) != 0) {
1991 pos -= llrint (beats * tempo->frames_per_beat (_frame_rate));
1999 /** Add the BBT interval op to pos and return the result */
2001 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
2003 Glib::Threads::RWLock::ReaderLock lm (lock);
2004 Metrics::const_iterator i;
2005 const MeterSection* meter;
2006 const MeterSection* m;
2007 const TempoSection* tempo;
2008 const TempoSection* t;
2009 double frames_per_beat;
2010 framepos_t effective_pos = max (pos, (framepos_t) 0);
2012 meter = &first_meter ();
2013 tempo = &first_tempo ();
2018 /* find the starting metrics for tempo & meter */
2020 for (i = metrics.begin(); i != metrics.end(); ++i) {
2022 if ((*i)->frame() > effective_pos) {
2026 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2028 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2035 meter -> the Meter for "pos"
2036 tempo -> the Tempo for "pos"
2037 i -> for first new metric after "pos", possibly metrics.end()
2040 /* now comes the complicated part. we have to add one beat a time,
2041 checking for a new metric on every beat.
2044 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2053 /* check if we need to use a new metric section: has adding frames moved us
2054 to or after the start of the next metric section? in which case, use it.
2057 if (i != metrics.end()) {
2058 if ((*i)->frame() <= pos) {
2060 /* about to change tempo or meter, so add the
2061 * number of frames for the bars we've just
2062 * traversed before we change the
2063 * frames_per_beat value.
2066 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2069 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2071 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2075 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2082 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2088 /* given the current meter, have we gone past the end of the bar ? */
2093 /* check if we need to use a new metric section: has adding frames moved us
2094 to or after the start of the next metric section? in which case, use it.
2097 if (i != metrics.end()) {
2098 if ((*i)->frame() <= pos) {
2100 /* about to change tempo or meter, so add the
2101 * number of frames for the beats we've just
2102 * traversed before we change the
2103 * frames_per_beat value.
2106 pos += llrint (beats * frames_per_beat);
2109 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2111 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2115 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2120 pos += llrint (beats * frames_per_beat);
2123 if (op.ticks >= BBT_Time::ticks_per_beat) {
2124 pos += llrint (frames_per_beat + /* extra beat */
2125 (frames_per_beat * ((op.ticks % (uint32_t) BBT_Time::ticks_per_beat) /
2126 (double) BBT_Time::ticks_per_beat)));
2128 pos += llrint (frames_per_beat * (op.ticks / (double) BBT_Time::ticks_per_beat));
2135 /** Count the number of beats that are equivalent to distance when going forward,
2139 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
2141 Glib::Threads::RWLock::ReaderLock lm (lock);
2142 Metrics::const_iterator next_tempo;
2143 const TempoSection* tempo = 0;
2144 framepos_t effective_pos = max (pos, (framepos_t) 0);
2146 /* Find the relevant initial tempo metric */
2148 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
2150 const TempoSection* t;
2152 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
2154 if ((*next_tempo)->frame() > effective_pos) {
2164 tempo -> the Tempo for "pos"
2165 next_tempo -> the next tempo after "pos", possibly metrics.end()
2170 DEBUG_TRACE (DEBUG::TempoMath,
2171 string_compose ("frame %1 walk by %2 frames, start with tempo = %3 @ %4\n",
2172 pos, distance, *((const Tempo*)tempo), tempo->frame()));
2174 Evoral::MusicalTime beats = 0;
2178 /* End of this section */
2180 /* Distance to `end' in frames */
2181 framepos_t distance_to_end;
2183 if (next_tempo == metrics.end ()) {
2184 /* We can't do (end - pos) if end is max_framepos, as it will overflow if pos is -ve */
2186 distance_to_end = max_framepos;
2188 end = (*next_tempo)->frame ();
2189 distance_to_end = end - pos;
2192 /* Amount to subtract this time */
2193 double const sub = min (distance, distance_to_end);
2195 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("to reach end at %1 (end ? %2), distance= %3 sub=%4\n", end, (next_tempo == metrics.end()),
2196 distance_to_end, sub));
2202 beats += sub / tempo->frames_per_beat (_frame_rate);
2204 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1, beats = %2 distance left %3\n",
2205 pos, beats, distance));
2207 /* Move on if there's anything to move to */
2209 if (next_tempo != metrics.end()) {
2211 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
2213 DEBUG_TRACE (DEBUG::TempoMath,
2214 string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
2215 *((const Tempo*)tempo), tempo->frame(),
2216 tempo->frames_per_beat (_frame_rate)));
2218 while (next_tempo != metrics.end ()) {
2222 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
2227 if (next_tempo == metrics.end()) {
2228 DEBUG_TRACE (DEBUG::TempoMath, "no more tempo sections\n");
2230 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("next tempo section is %1 @ %2\n",
2231 **next_tempo, (*next_tempo)->frame()));
2241 TempoMap::BBTPointList::const_iterator
2242 TempoMap::bbt_before_or_at (framepos_t pos)
2244 /* CALLER MUST HOLD READ LOCK */
2246 BBTPointList::const_iterator i;
2249 /* not really correct, but we should catch pos < 0 at a higher
2252 return _map.begin();
2255 i = lower_bound (_map.begin(), _map.end(), pos);
2256 assert (i != _map.end());
2257 if ((*i).frame > pos) {
2258 assert (i != _map.begin());
2265 bool operator() (const BBT_Time& a, const BBT_Time& b) {
2270 TempoMap::BBTPointList::const_iterator
2271 TempoMap::bbt_before_or_at (const BBT_Time& bbt)
2273 BBTPointList::const_iterator i;
2276 i = lower_bound (_map.begin(), _map.end(), bbt, cmp);
2277 assert (i != _map.end());
2278 if ((*i).bar > bbt.bars || (*i).beat > bbt.beats) {
2279 assert (i != _map.begin());
2285 TempoMap::BBTPointList::const_iterator
2286 TempoMap::bbt_after_or_at (framepos_t pos)
2288 /* CALLER MUST HOLD READ LOCK */
2290 BBTPointList::const_iterator i;
2292 if (_map.back().frame == pos) {
2294 assert (i != _map.begin());
2299 i = upper_bound (_map.begin(), _map.end(), pos);
2300 assert (i != _map.end());
2305 operator<< (std::ostream& o, const Meter& m) {
2306 return o << m.divisions_per_bar() << '/' << m.note_divisor();
2310 operator<< (std::ostream& o, const Tempo& t) {
2311 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
2315 operator<< (std::ostream& o, const MetricSection& section) {
2317 o << "MetricSection @ " << section.frame() << " aka " << section.start() << ' ';
2319 const TempoSection* ts;
2320 const MeterSection* ms;
2322 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
2323 o << *((const Tempo*) ts);
2324 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
2325 o << *((const Meter*) ms);