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);
47 Tempo::frames_per_beat (framecnt_t sr) const
49 return (60.0 * sr) / _beats_per_minute;
52 /***********************************************************************/
55 Meter::frames_per_grid (const Tempo& tempo, framecnt_t sr) const
57 /* This is tempo- and meter-sensitive. The number it returns
58 is based on the interval between any two lines in the
59 grid that is constructed from tempo and meter sections.
61 The return value IS NOT interpretable in terms of "beats".
64 return (60.0 * sr) / (tempo.beats_per_minute() * (_note_type/tempo.note_type()));
68 Meter::frames_per_bar (const Tempo& tempo, framecnt_t sr) const
70 return frames_per_grid (tempo, sr) * _divisions_per_bar;
73 /***********************************************************************/
75 const string TempoSection::xml_state_node_name = "Tempo";
77 TempoSection::TempoSection (const XMLNode& node)
78 : MetricSection (BBT_Time()), Tempo (TempoMap::default_tempo())
80 const XMLProperty *prop;
82 LocaleGuard lg (X_("POSIX"));
84 if ((prop = node.property ("start")) == 0) {
85 error << _("TempoSection XML node has no \"start\" property") << endmsg;
86 throw failed_constructor();
89 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
93 error << _("TempoSection XML node has an illegal \"start\" value") << endmsg;
94 throw failed_constructor();
99 if ((prop = node.property ("beats-per-minute")) == 0) {
100 error << _("TempoSection XML node has no \"beats-per-minute\" property") << endmsg;
101 throw failed_constructor();
104 if (sscanf (prop->value().c_str(), "%lf", &_beats_per_minute) != 1 || _beats_per_minute < 0.0) {
105 error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg;
106 throw failed_constructor();
109 if ((prop = node.property ("note-type")) == 0) {
110 /* older session, make note type be quarter by default */
113 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 1.0) {
114 error << _("TempoSection XML node has an illegal \"note-type\" value") << endmsg;
115 throw failed_constructor();
119 if ((prop = node.property ("movable")) == 0) {
120 error << _("TempoSection XML node has no \"movable\" property") << endmsg;
121 throw failed_constructor();
124 set_movable (string_is_affirmative (prop->value()));
126 if ((prop = node.property ("bar-offset")) == 0) {
129 if (sscanf (prop->value().c_str(), "%lf", &_bar_offset) != 1 || _bar_offset < 0.0) {
130 error << _("TempoSection XML node has an illegal \"bar-offset\" value") << endmsg;
131 throw failed_constructor();
137 TempoSection::get_state() const
139 XMLNode *root = new XMLNode (xml_state_node_name);
141 LocaleGuard lg (X_("POSIX"));
143 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
147 root->add_property ("start", buf);
148 snprintf (buf, sizeof (buf), "%f", _beats_per_minute);
149 root->add_property ("beats-per-minute", buf);
150 snprintf (buf, sizeof (buf), "%f", _note_type);
151 root->add_property ("note-type", buf);
152 // snprintf (buf, sizeof (buf), "%f", _bar_offset);
153 // root->add_property ("bar-offset", buf);
154 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
155 root->add_property ("movable", buf);
162 TempoSection::update_bar_offset_from_bbt (const Meter& m)
164 _bar_offset = ((start().beats - 1) * BBT_Time::ticks_per_beat + start().ticks) /
165 (m.divisions_per_bar() * BBT_Time::ticks_per_beat);
167 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Tempo set bar offset to %1 from %2 w/%3\n", _bar_offset, start(), m.divisions_per_bar()));
171 TempoSection::update_bbt_time_from_bar_offset (const Meter& meter)
175 if (_bar_offset < 0.0) {
180 new_start.bars = start().bars;
182 double ticks = BBT_Time::ticks_per_beat * meter.divisions_per_bar() * _bar_offset;
183 new_start.beats = (uint32_t) floor (ticks/BBT_Time::ticks_per_beat);
184 new_start.ticks = 0; /* (uint32_t) fmod (ticks, BBT_Time::ticks_per_beat); */
186 /* remember the 1-based counting properties of beats */
187 new_start.beats += 1;
189 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("from bar offset %1 and dpb %2, ticks = %3->%4 beats = %5\n",
190 _bar_offset, meter.divisions_per_bar(), ticks, new_start.ticks, new_start.beats));
192 set_start (new_start);
195 /***********************************************************************/
197 const string MeterSection::xml_state_node_name = "Meter";
199 MeterSection::MeterSection (const XMLNode& node)
200 : MetricSection (BBT_Time()), Meter (TempoMap::default_meter())
202 const XMLProperty *prop;
204 LocaleGuard lg (X_("POSIX"));
206 if ((prop = node.property ("start")) == 0) {
207 error << _("MeterSection XML node has no \"start\" property") << endmsg;
208 throw failed_constructor();
211 if (sscanf (prop->value().c_str(), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
215 error << _("MeterSection XML node has an illegal \"start\" value") << endmsg;
216 throw failed_constructor();
221 /* beats-per-bar is old; divisions-per-bar is new */
223 if ((prop = node.property ("divisions-per-bar")) == 0) {
224 if ((prop = node.property ("beats-per-bar")) == 0) {
225 error << _("MeterSection XML node has no \"beats-per-bar\" or \"divisions-per-bar\" property") << endmsg;
226 throw failed_constructor();
230 if (sscanf (prop->value().c_str(), "%lf", &_divisions_per_bar) != 1 || _divisions_per_bar < 0.0) {
231 error << _("MeterSection XML node has an illegal \"beats-per-bar\" or \"divisions-per-bar\" value") << endmsg;
232 throw failed_constructor();
235 if ((prop = node.property ("note-type")) == 0) {
236 error << _("MeterSection XML node has no \"note-type\" property") << endmsg;
237 throw failed_constructor();
240 if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) {
241 error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg;
242 throw failed_constructor();
245 if ((prop = node.property ("movable")) == 0) {
246 error << _("MeterSection XML node has no \"movable\" property") << endmsg;
247 throw failed_constructor();
250 set_movable (string_is_affirmative (prop->value()));
254 MeterSection::get_state() const
256 XMLNode *root = new XMLNode (xml_state_node_name);
258 LocaleGuard lg (X_("POSIX"));
260 snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32,
264 root->add_property ("start", buf);
265 snprintf (buf, sizeof (buf), "%f", _note_type);
266 root->add_property ("note-type", buf);
267 snprintf (buf, sizeof (buf), "%f", _divisions_per_bar);
268 root->add_property ("divisions-per-bar", buf);
269 snprintf (buf, sizeof (buf), "%s", movable()?"yes":"no");
270 root->add_property ("movable", buf);
275 /***********************************************************************/
277 struct MetricSectionSorter {
278 bool operator() (const MetricSection* a, const MetricSection* b) {
279 return a->start() < b->start();
283 TempoMap::TempoMap (framecnt_t fr)
292 TempoSection *t = new TempoSection (start, _default_tempo.beats_per_minute(), _default_tempo.note_type());
293 MeterSection *m = new MeterSection (start, _default_meter.divisions_per_bar(), _default_meter.note_divisor());
295 t->set_movable (false);
296 m->set_movable (false);
298 /* note: frame time is correct (zero) for both of these */
300 metrics.push_back (t);
301 metrics.push_back (m);
304 TempoMap::~TempoMap ()
309 TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
311 bool removed = false;
314 Glib::Threads::RWLock::WriterLock lm (lock);
317 for (i = metrics.begin(); i != metrics.end(); ++i) {
318 if (dynamic_cast<TempoSection*> (*i) != 0) {
319 if (tempo.frame() == (*i)->frame()) {
320 if ((*i)->movable()) {
329 if (removed && complete_operation) {
330 recompute_map (false);
334 if (removed && complete_operation) {
335 PropertyChanged (PropertyChange ());
340 TempoMap::remove_meter (const MeterSection& tempo, bool complete_operation)
342 bool removed = false;
345 Glib::Threads::RWLock::WriterLock lm (lock);
348 for (i = metrics.begin(); i != metrics.end(); ++i) {
349 if (dynamic_cast<MeterSection*> (*i) != 0) {
350 if (tempo.frame() == (*i)->frame()) {
351 if ((*i)->movable()) {
360 if (removed && complete_operation) {
361 recompute_map (true);
365 if (removed && complete_operation) {
366 PropertyChanged (PropertyChange ());
371 TempoMap::do_insert (MetricSection* section)
373 bool need_add = true;
375 assert (section->start().ticks == 0);
377 /* we only allow new meters to be inserted on beat 1 of an existing
381 if (dynamic_cast<MeterSection*>(section)) {
383 /* we need to (potentially) update the BBT times of tempo
384 sections based on this new meter.
387 if ((section->start().beats != 1) || (section->start().ticks != 0)) {
389 BBT_Time corrected = section->start();
393 warning << string_compose (_("Meter changes can only be positioned on the first beat of a bar. Moving from %1 to %2"),
394 section->start(), corrected) << endmsg;
396 section->set_start (corrected);
402 /* Look for any existing MetricSection that is of the same type and
403 in the same bar as the new one, and remove it before adding
404 the new one. Note that this means that if we find a matching,
405 existing section, we can break out of the loop since we're
406 guaranteed that there is only one such match.
409 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
411 bool const iter_is_tempo = dynamic_cast<TempoSection*> (*i) != 0;
412 bool const insert_is_tempo = dynamic_cast<TempoSection*> (section) != 0;
414 if (iter_is_tempo && insert_is_tempo) {
418 if ((*i)->start().bars == section->start().bars &&
419 (*i)->start().beats == section->start().beats) {
421 if (!(*i)->movable()) {
423 /* can't (re)move this section, so overwrite
424 * its data content (but not its properties as
428 *(dynamic_cast<Tempo*>(*i)) = *(dynamic_cast<Tempo*>(section));
436 } else if (!iter_is_tempo && !insert_is_tempo) {
440 if ((*i)->start().bars == section->start().bars) {
442 if (!(*i)->movable()) {
444 /* can't (re)move this section, so overwrite
445 * its data content (but not its properties as
449 *(dynamic_cast<Meter*>(*i)) = *(dynamic_cast<Meter*>(section));
459 /* non-matching types, so we don't care */
463 /* Add the given MetricSection, if we didn't just reset an existing
471 for (i = metrics.begin(); i != metrics.end(); ++i) {
472 if ((*i)->start() > section->start()) {
477 metrics.insert (i, section);
482 TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const BBT_Time& where)
484 const TempoSection& first (first_tempo());
486 if (ts.start() != first.start()) {
487 remove_tempo (ts, false);
488 add_tempo (tempo, where);
491 Glib::Threads::RWLock::WriterLock lm (lock);
492 /* cannot move the first tempo section */
493 *((Tempo*)&first) = tempo;
494 recompute_map (false);
498 PropertyChanged (PropertyChange ());
502 TempoMap::add_tempo (const Tempo& tempo, BBT_Time where)
505 Glib::Threads::RWLock::WriterLock lm (lock);
507 /* new tempos always start on a beat */
510 TempoSection* ts = new TempoSection (where, tempo.beats_per_minute(), tempo.note_type());
512 /* find the meter to use to set the bar offset of this
516 const Meter* meter = &first_meter();
518 /* as we start, we are *guaranteed* to have m.meter and m.tempo pointing
519 at something, because we insert the default tempo and meter during
520 TempoMap construction.
522 now see if we can find better candidates.
525 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
527 const MeterSection* m;
529 if (where < (*i)->start()) {
533 if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
538 ts->update_bar_offset_from_bbt (*meter);
544 recompute_map (false);
548 PropertyChanged (PropertyChange ());
552 TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where)
554 const MeterSection& first (first_meter());
556 if (ms.start() != first.start()) {
557 remove_meter (ms, false);
558 add_meter (meter, where);
561 Glib::Threads::RWLock::WriterLock lm (lock);
562 /* cannot move the first meter section */
563 *((Meter*)&first) = meter;
564 recompute_map (true);
568 PropertyChanged (PropertyChange ());
572 TempoMap::add_meter (const Meter& meter, BBT_Time where)
575 Glib::Threads::RWLock::WriterLock lm (lock);
577 /* a new meter always starts a new bar on the first beat. so
578 round the start time appropriately. remember that
579 `where' is based on the existing tempo map, not
580 the result after we insert the new meter.
584 if (where.beats != 1) {
589 /* new meters *always* start on a beat. */
592 do_insert (new MeterSection (where, meter.divisions_per_bar(), meter.note_divisor()));
593 recompute_map (true);
598 if (DEBUG_ENABLED(DEBUG::TempoMap)) {
603 PropertyChanged (PropertyChange ());
607 TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
609 Tempo newtempo (beats_per_minute, note_type);
612 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
613 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
615 Glib::Threads::RWLock::WriterLock lm (lock);
616 *((Tempo*) t) = newtempo;
617 recompute_map (false);
619 PropertyChanged (PropertyChange ());
626 TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
628 Tempo newtempo (beats_per_minute, note_type);
634 /* find the TempoSection immediately preceding "where"
637 for (first = 0, i = metrics.begin(), prev = 0; i != metrics.end(); ++i) {
639 if ((*i)->frame() > where) {
645 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
655 error << string_compose (_("no tempo sections defined in tempo map - cannot change tempo @ %1"), where) << endmsg;
665 Glib::Threads::RWLock::WriterLock lm (lock);
666 /* cannot move the first tempo section */
667 *((Tempo*)prev) = newtempo;
668 recompute_map (false);
671 PropertyChanged (PropertyChange ());
675 TempoMap::first_meter () const
677 const MeterSection *m = 0;
679 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
680 if ((m = dynamic_cast<const MeterSection *> (*i)) != 0) {
685 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
691 TempoMap::first_tempo () const
693 const TempoSection *t = 0;
695 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
696 if ((t = dynamic_cast<const TempoSection *> (*i)) != 0) {
701 fatal << _("programming error: no tempo section in tempo map!") << endmsg;
707 TempoMap::require_map_to (framepos_t pos)
709 Glib::Threads::RWLock::WriterLock lm (lock);
711 if (_map.empty() || _map.back().frame < pos) {
717 TempoMap::require_map_to (const BBT_Time& bbt)
719 Glib::Threads::RWLock::WriterLock lm (lock);
721 /* since we have no idea where BBT is if its off the map, see the last
722 * point in the map is past BBT, and if not add an arbitrary amount of
726 int additional_minutes = 1;
729 if (!_map.empty() && _map.back().bar >= (bbt.bars + 1)) {
732 /* add some more distance, using bigger steps each time */
733 extend_map (_map.back().frame + (_frame_rate * 60 * additional_minutes));
734 additional_minutes *= 2;
739 TempoMap::recompute_map (bool reassign_tempo_bbt, framepos_t end)
741 /* CALLER MUST HOLD WRITE LOCK */
743 MeterSection* meter = 0;
744 TempoSection* tempo = 0;
745 double current_frame;
747 Metrics::iterator next_metric;
751 /* we will actually stop once we hit
757 if (!_map.empty ()) {
758 /* never allow the map to be shortened */
759 end = max (end, _map.back().frame);
763 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
765 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
768 if ((ms = dynamic_cast<MeterSection *> (*i)) != 0) {
774 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
777 if ((ts = dynamic_cast<TempoSection *> (*i)) != 0) {
783 /* assumes that the first meter & tempo are at frame zero */
785 meter->set_frame (0);
786 tempo->set_frame (0);
788 /* assumes that the first meter & tempo are at 1|1|0 */
793 if (reassign_tempo_bbt) {
795 MeterSection* rmeter = meter;
797 DEBUG_TRACE (DEBUG::TempoMath, "\tUpdating tempo marks BBT time from bar offset\n");
799 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
804 if ((ts = dynamic_cast<TempoSection*>(*i)) != 0) {
806 /* reassign the BBT time of this tempo section
807 * based on its bar offset position.
810 ts->update_bbt_time_from_bar_offset (*rmeter);
812 } else if ((ms = dynamic_cast<MeterSection*>(*i)) != 0) {
815 fatal << _("programming error: unhandled MetricSection type") << endmsg;
821 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("start with meter = %1 tempo = %2\n", *((Meter*)meter), *((Tempo*)tempo)));
823 next_metric = metrics.begin();
824 ++next_metric; // skip meter (or tempo)
825 ++next_metric; // skip tempo (or meter)
829 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add first bar at 1|1 @ %2\n", current.bars, current_frame));
830 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), 1, 1));
833 /* silly call from Session::process() during startup
838 _extend_map (tempo, meter, next_metric, current, current_frame, end);
842 TempoMap::extend_map (framepos_t end)
844 /* CALLER MUST HOLD WRITE LOCK */
847 recompute_map (false, end);
851 BBTPointList::const_iterator i = _map.end();
852 Metrics::iterator next_metric;
856 BBT_Time last_metric_start;
858 if ((*i).tempo->frame() > (*i).meter->frame()) {
859 last_metric_start = (*i).tempo->start();
861 last_metric_start = (*i).meter->start();
864 /* find the metric immediately after the tempo + meter sections for the
865 * last point in the map
868 for (next_metric = metrics.begin(); next_metric != metrics.end(); ++next_metric) {
869 if ((*next_metric)->start() > last_metric_start) {
874 /* we cast away const here because this is the one place where we need
875 * to actually modify the frame time of each metric section.
878 _extend_map (const_cast<TempoSection*> ((*i).tempo),
879 const_cast<MeterSection*> ((*i).meter),
880 next_metric, BBT_Time ((*i).bar, (*i).beat, 0), (*i).frame, end);
884 TempoMap::_extend_map (TempoSection* tempo, MeterSection* meter,
885 Metrics::iterator next_metric,
886 BBT_Time current, framepos_t current_frame, framepos_t end)
888 /* CALLER MUST HOLD WRITE LOCK */
893 framepos_t bar_start_frame;
895 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Extend map to %1 from %2 = %3\n", end, current, current_frame));
897 if (current.beats == 1) {
898 bar_start_frame = current_frame;
903 beat_frames = meter->frames_per_grid (*tempo,_frame_rate);
905 while (current_frame < end) {
908 current_frame += beat_frames;
910 if (current.beats > meter->divisions_per_bar()) {
915 if (next_metric != metrics.end()) {
917 /* no operator >= so invert operator < */
919 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1 next metric @ %2\n", current, (*next_metric)->start()));
921 if (!(current < (*next_metric)->start())) {
924 if (((ts = dynamic_cast<TempoSection*> (*next_metric)) != 0)) {
928 /* new tempo section: if its on a beat,
929 * we don't have to do anything other
930 * than recompute various distances,
931 * done further below as we transition
932 * the next metric section.
934 * if its not on the beat, we have to
935 * compute the duration of the beat it
936 * is within, which will be different
937 * from the preceding following ones
938 * since it takes part of its duration
939 * from the preceding tempo and part
940 * from this new tempo.
943 if (tempo->start().ticks != 0) {
945 double next_beat_frames = tempo->frames_per_beat (_frame_rate);
947 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into non-beat-aligned tempo metric at %1 = %2, adjust next beat using %3\n",
948 tempo->start(), current_frame, tempo->bar_offset()));
950 /* back up to previous beat */
951 current_frame -= beat_frames;
953 /* set tempo section location
954 * based on offset from last
957 tempo->set_frame (bar_start_frame +
958 llrint ((ts->bar_offset() * meter->divisions_per_bar() * beat_frames)));
960 /* advance to the location of
961 * the new (adjusted) beat. do
962 * this by figuring out the
963 * offset within the beat that
964 * would have been there
966 * change. then stretch the
970 double offset_within_old_beat = (tempo->frame() - current_frame) / beat_frames;
972 current_frame += (offset_within_old_beat * beat_frames) + ((1.0 - offset_within_old_beat) * next_beat_frames);
974 /* next metric doesn't have to
975 * match this precisely to
978 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Adjusted last beat to %1\n", current_frame));
982 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into beat-aligned tempo metric at %1 = %2\n",
983 tempo->start(), current_frame));
984 tempo->set_frame (current_frame);
987 } else if ((ms = dynamic_cast<MeterSection*>(*next_metric)) != 0) {
991 /* new meter section: always defines the
995 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("bumped into meter section at %1 vs %2 (%3)\n",
996 meter->start(), current, current_frame));
998 assert (current.beats == 1);
1000 meter->set_frame (current_frame);
1003 beat_frames = meter->frames_per_grid (*tempo, _frame_rate);
1005 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("New metric with beat frames = %1 dpb %2 meter %3 tempo %4\n",
1006 beat_frames, meter->divisions_per_bar(), *((Meter*)meter), *((Tempo*)tempo)));
1010 if (next_metric != metrics.end() && ((*next_metric)->start() == current)) {
1011 /* same position so go back and set this one up before advancing
1019 if (current.beats == 1) {
1020 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Bar at %1|1 @ %2\n", current.bars, current_frame));
1021 _map.push_back (BBTPoint (*meter, *tempo,(framepos_t) llrint(current_frame), current.bars, 1));
1022 bar_start_frame = current_frame;
1024 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("Add Beat at %1|%2 @ %3\n", current.bars, current.beats, current_frame));
1025 _map.push_back (BBTPoint (*meter, *tempo, (framepos_t) llrint(current_frame), current.bars, current.beats));
1028 if (next_metric == metrics.end()) {
1029 /* no more metrics - we've timestamped them all, stop here */
1030 if (end == max_framepos) {
1031 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("stop extending map now that we've reach the end @ %1|%2 = %3\n",
1032 current.bars, current.beats, current_frame));
1040 TempoMap::metric_at (framepos_t frame) const
1042 Glib::Threads::RWLock::ReaderLock lm (lock);
1043 TempoMetric m (first_meter(), first_tempo());
1047 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1048 at something, because we insert the default tempo and meter during
1049 TempoMap construction.
1051 now see if we can find better candidates.
1054 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1056 if ((*i)->frame() > frame) {
1060 if ((tempo = dynamic_cast<const TempoSection*>(*i)) != 0) {
1061 m.set_tempo (*tempo);
1062 } else if ((meter = dynamic_cast<const MeterSection*>(*i)) != 0) {
1063 m.set_meter (*meter);
1066 m.set_frame ((*i)->frame ());
1067 m.set_start ((*i)->start ());
1074 TempoMap::metric_at (BBT_Time bbt) const
1076 Glib::Threads::RWLock::ReaderLock lm (lock);
1077 TempoMetric m (first_meter(), first_tempo());
1081 /* at this point, we are *guaranteed* to have m.meter and m.tempo pointing
1082 at something, because we insert the default tempo and meter during
1083 TempoMap construction.
1085 now see if we can find better candidates.
1088 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1090 BBT_Time section_start ((*i)->start());
1092 if (section_start.bars > bbt.bars || (section_start.bars == bbt.bars && section_start.beats > bbt.beats)) {
1096 if ((tempo = dynamic_cast<const TempoSection*>(*i)) != 0) {
1097 m.set_tempo (*tempo);
1098 } else if ((meter = dynamic_cast<const MeterSection*>(*i)) != 0) {
1099 m.set_meter (*meter);
1102 m.set_frame ((*i)->frame ());
1103 m.set_start (section_start);
1110 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt)
1112 require_map_to (frame);
1114 Glib::Threads::RWLock::ReaderLock lm (lock);
1120 warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
1124 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1128 TempoMap::bbt_time_rt (framepos_t frame, BBT_Time& bbt)
1130 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
1133 throw std::logic_error ("TempoMap::bbt_time_rt() could not lock tempo map");
1136 if (_map.empty() || _map.back().frame < frame) {
1137 throw std::logic_error (string_compose ("map not long enough to reach %1", frame));
1140 return bbt_time (frame, bbt, bbt_before_or_at (frame));
1144 TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt, const BBTPointList::const_iterator& i)
1146 /* CALLER MUST HOLD READ LOCK */
1148 bbt.bars = (*i).bar;
1149 bbt.beats = (*i).beat;
1151 if ((*i).frame == frame) {
1154 bbt.ticks = llrint (((frame - (*i).frame) / (*i).tempo->frames_per_beat(_frame_rate)) *
1155 BBT_Time::ticks_per_beat);
1160 TempoMap::frame_time (const BBT_Time& bbt)
1163 warning << string_compose (_("tempo map asked for frame time at bar < 1 (%1)\n"), bbt) << endmsg;
1167 if (bbt.beats < 1) {
1168 throw std::logic_error ("beats are counted from one");
1171 require_map_to (bbt);
1173 Glib::Threads::RWLock::ReaderLock lm (lock);
1175 BBTPointList::const_iterator s = bbt_before_or_at (BBT_Time (1, 1, 0));
1176 BBTPointList::const_iterator e = bbt_before_or_at (BBT_Time (bbt.bars, bbt.beats, 0));
1178 if (bbt.ticks != 0) {
1179 return ((*e).frame - (*s).frame) +
1180 llrint ((*e).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat));
1182 return ((*e).frame - (*s).frame);
1187 TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
1190 bbt_time (pos, when);
1192 Glib::Threads::RWLock::ReaderLock lm (lock);
1193 return bbt_duration_at_unlocked (when, bbt, dir);
1197 TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int /*dir*/)
1199 if (bbt.bars == 0 && bbt.beats == 0 && bbt.ticks == 0) {
1203 /* round back to the previous precise beat */
1204 BBTPointList::const_iterator wi = bbt_before_or_at (BBT_Time (when.bars, when.beats, 0));
1205 BBTPointList::const_iterator start (wi);
1207 assert (wi != _map.end());
1212 while (wi != _map.end() && bars < bbt.bars) {
1214 if ((*wi).is_bar()) {
1218 assert (wi != _map.end());
1220 while (wi != _map.end() && beats < bbt.beats) {
1224 assert (wi != _map.end());
1226 /* add any additional frames related to ticks in the added value */
1228 if (bbt.ticks != 0) {
1229 return ((*wi).frame - (*start).frame) +
1230 (*wi).tempo->frames_per_beat (_frame_rate) * (bbt.ticks/BBT_Time::ticks_per_beat);
1232 return ((*wi).frame - (*start).frame);
1237 TempoMap::round_to_bar (framepos_t fr, int dir)
1239 return round_to_type (fr, dir, Bar);
1243 TempoMap::round_to_beat (framepos_t fr, int dir)
1245 return round_to_type (fr, dir, Beat);
1249 TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, int dir)
1251 require_map_to (fr);
1253 Glib::Threads::RWLock::ReaderLock lm (lock);
1254 BBTPointList::const_iterator i = bbt_before_or_at (fr);
1256 uint32_t ticks_one_subdivisions_worth;
1257 uint32_t difference;
1259 bbt_time (fr, the_beat, i);
1261 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("round %1 to nearest 1/%2 beat, before-or-at = %3 @ %4|%5 precise = %6\n",
1262 fr, sub_num, (*i).frame, (*i).bar, (*i).beat, the_beat));
1264 ticks_one_subdivisions_worth = (uint32_t)BBT_Time::ticks_per_beat / sub_num;
1268 /* round to next (even if we're on a subdivision */
1270 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1273 /* right on the subdivision, so the difference is just the subdivision ticks */
1274 the_beat.ticks += ticks_one_subdivisions_worth;
1277 /* not on subdivision, compute distance to next subdivision */
1279 the_beat.ticks += ticks_one_subdivisions_worth - mod;
1282 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1283 assert (i != _map.end());
1285 assert (i != _map.end());
1286 the_beat.ticks -= BBT_Time::ticks_per_beat;
1290 } else if (dir < 0) {
1292 /* round to previous (even if we're on a subdivision) */
1294 uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth;
1297 /* right on the subdivision, so the difference is just the subdivision ticks */
1298 difference = ticks_one_subdivisions_worth;
1300 /* not on subdivision, compute distance to previous subdivision, which
1301 is just the modulus.
1307 if (the_beat.ticks < difference) {
1308 if (i == _map.begin()) {
1309 /* can't go backwards from wherever pos is, so just return it */
1313 the_beat.ticks = BBT_Time::ticks_per_beat - the_beat.ticks;
1315 the_beat.ticks -= difference;
1319 /* round to nearest */
1323 /* compute the distance to the previous and next subdivision */
1325 if ((rem = fmod ((double) the_beat.ticks, (double) ticks_one_subdivisions_worth)) > ticks_one_subdivisions_worth/2.0) {
1327 /* closer to the next subdivision, so shift forward */
1329 the_beat.ticks = lrint (the_beat.ticks + (ticks_one_subdivisions_worth - rem));
1331 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved forward to %1\n", the_beat.ticks));
1333 if (the_beat.ticks > BBT_Time::ticks_per_beat) {
1334 assert (i != _map.end());
1336 assert (i != _map.end());
1337 the_beat.ticks -= BBT_Time::ticks_per_beat;
1338 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("fold beat to %1\n", the_beat));
1341 } else if (rem > 0) {
1343 /* closer to previous subdivision, so shift backward */
1345 if (rem > the_beat.ticks) {
1346 if (i == _map.begin()) {
1347 /* can't go backwards past zero, so ... */
1350 /* step back to previous beat */
1352 the_beat.ticks = lrint (BBT_Time::ticks_per_beat - rem);
1353 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("step back beat to %1\n", the_beat));
1355 the_beat.ticks = lrint (the_beat.ticks - rem);
1356 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("moved backward to %1\n", the_beat.ticks));
1359 /* on the subdivision, do nothing */
1363 return (*i).frame + (the_beat.ticks/BBT_Time::ticks_per_beat) *
1364 (*i).tempo->frames_per_beat (_frame_rate);
1368 TempoMap::round_to_type (framepos_t frame, int dir, BBTPointType type)
1370 require_map_to (frame);
1372 Glib::Threads::RWLock::ReaderLock lm (lock);
1373 BBTPointList::const_iterator fi;
1376 fi = bbt_after_or_at (frame);
1378 fi = bbt_before_or_at (frame);
1381 assert (fi != _map.end());
1383 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,
1384 (type == Bar ? "bar" : "beat")));
1389 /* find bar previous to 'frame' */
1391 if (fi == _map.begin()) {
1395 if ((*fi).is_bar() && (*fi).frame == frame) {
1399 while (!(*fi).is_bar()) {
1400 if (fi == _map.begin()) {
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));
1409 } else if (dir > 0) {
1411 /* find bar following 'frame' */
1413 if ((*fi).is_bar() && (*fi).frame == frame) {
1417 while (!(*fi).is_bar()) {
1419 if (fi == _map.end()) {
1425 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to bar: map iter at %1|%2 %3, return\n",
1426 (*fi).bar, (*fi).beat, (*fi).frame));
1431 /* true rounding: find nearest bar */
1433 BBTPointList::const_iterator prev = fi;
1434 BBTPointList::const_iterator next = fi;
1436 if ((*fi).frame == frame) {
1440 while ((*prev).beat != 1) {
1441 if (prev == _map.begin()) {
1447 while ((next != _map.end()) && (*next).beat != 1) {
1451 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1452 return (*prev).frame;
1454 return (*next).frame;
1464 if (fi == _map.begin()) {
1468 if ((*fi).frame >= frame) {
1469 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step back\n");
1472 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1473 (*fi).bar, (*fi).beat, (*fi).frame));
1475 } else if (dir > 0) {
1476 if ((*fi).frame <= frame) {
1477 DEBUG_TRACE (DEBUG::SnapBBT, "requested frame is on beat, step forward\n");
1480 DEBUG_TRACE (DEBUG::SnapBBT, string_compose ("rounded to beat: map iter at %1|%2 %3, return\n",
1481 (*fi).bar, (*fi).beat, (*fi).frame));
1484 /* find beat nearest to frame */
1485 if ((*fi).frame == frame) {
1489 BBTPointList::const_iterator prev = fi;
1490 BBTPointList::const_iterator next = fi;
1492 /* fi is already the beat before_or_at frame, and
1493 we've just established that its not at frame, so its
1494 the beat before frame.
1498 if ((next == _map.end()) || (frame - (*prev).frame) < ((*next).frame - frame)) {
1499 return (*prev).frame;
1501 return (*next).frame;
1513 TempoMap::get_grid (TempoMap::BBTPointList::const_iterator& begin,
1514 TempoMap::BBTPointList::const_iterator& end,
1515 framepos_t lower, framepos_t upper)
1518 Glib::Threads::RWLock::WriterLock lm (lock);
1519 if (_map.empty() || (_map.back().frame < upper)) {
1520 recompute_map (false, upper);
1524 begin = lower_bound (_map.begin(), _map.end(), lower);
1525 end = upper_bound (_map.begin(), _map.end(), upper);
1529 TempoMap::tempo_section_at (framepos_t frame) const
1531 Glib::Threads::RWLock::ReaderLock lm (lock);
1532 Metrics::const_iterator i;
1533 TempoSection* prev = 0;
1535 for (i = metrics.begin(); i != metrics.end(); ++i) {
1538 if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
1540 if ((*i)->frame() > frame) {
1556 TempoMap::tempo_at (framepos_t frame) const
1558 TempoMetric m (metric_at (frame));
1564 TempoMap::meter_at (framepos_t frame) const
1566 TempoMetric m (metric_at (frame));
1571 TempoMap::get_state ()
1573 Metrics::const_iterator i;
1574 XMLNode *root = new XMLNode ("TempoMap");
1577 Glib::Threads::RWLock::ReaderLock lm (lock);
1578 for (i = metrics.begin(); i != metrics.end(); ++i) {
1579 root->add_child_nocopy ((*i)->get_state());
1587 TempoMap::set_state (const XMLNode& node, int /*version*/)
1590 Glib::Threads::RWLock::WriterLock lm (lock);
1593 XMLNodeConstIterator niter;
1594 Metrics old_metrics (metrics);
1595 MeterSection* last_meter = 0;
1598 nlist = node.children();
1600 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1601 XMLNode* child = *niter;
1603 if (child->name() == TempoSection::xml_state_node_name) {
1606 TempoSection* ts = new TempoSection (*child);
1607 metrics.push_back (ts);
1609 if (ts->bar_offset() < 0.0) {
1611 ts->update_bar_offset_from_bbt (*last_meter);
1616 catch (failed_constructor& err){
1617 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1618 metrics = old_metrics;
1622 } else if (child->name() == MeterSection::xml_state_node_name) {
1625 MeterSection* ms = new MeterSection (*child);
1626 metrics.push_back (ms);
1630 catch (failed_constructor& err) {
1631 error << _("Tempo map: could not set new state, restoring old one.") << endmsg;
1632 metrics = old_metrics;
1638 if (niter == nlist.end()) {
1639 MetricSectionSorter cmp;
1643 /* check for multiple tempo/meters at the same location, which
1644 ardour2 somehow allowed.
1647 Metrics::iterator prev = metrics.end();
1648 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
1649 if (prev != metrics.end()) {
1650 if (dynamic_cast<MeterSection*>(*prev) && dynamic_cast<MeterSection*>(*i)) {
1651 if ((*prev)->start() == (*i)->start()) {
1652 error << string_compose (_("Multiple meter definitions found at %1"), (*prev)->start()) << endmsg;
1655 } else if (dynamic_cast<TempoSection*>(*prev) && dynamic_cast<TempoSection*>(*i)) {
1656 if ((*prev)->start() == (*i)->start()) {
1657 error << string_compose (_("Multiple tempo definitions found at %1"), (*prev)->start()) << endmsg;
1665 recompute_map (true, -1);
1668 PropertyChanged (PropertyChange ());
1674 TempoMap::dump (std::ostream& o) const
1676 Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
1677 const MeterSection* m;
1678 const TempoSection* t;
1680 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1682 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
1683 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? "
1684 << t->movable() << ')' << endl;
1685 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
1686 o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->start() << " frame= " << m->frame()
1687 << " (movable? " << m->movable() << ')' << endl;
1693 TempoMap::n_tempos() const
1695 Glib::Threads::RWLock::ReaderLock lm (lock);
1698 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1699 if (dynamic_cast<const TempoSection*>(*i) != 0) {
1708 TempoMap::n_meters() const
1710 Glib::Threads::RWLock::ReaderLock lm (lock);
1713 for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
1714 if (dynamic_cast<const MeterSection*>(*i) != 0) {
1723 TempoMap::insert_time (framepos_t where, framecnt_t amount)
1726 Glib::Threads::RWLock::WriterLock lm (lock);
1727 for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
1728 if ((*i)->frame() >= where && (*i)->movable ()) {
1729 (*i)->set_frame ((*i)->frame() + amount);
1733 /* now reset the BBT time of all metrics, based on their new
1734 * audio time. This is the only place where we do this reverse
1738 Metrics::iterator i;
1739 const MeterSection* meter;
1740 const TempoSection* tempo;
1744 meter = &first_meter ();
1745 tempo = &first_tempo ();
1750 // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
1753 MetricSection* prev = 0;
1755 for (i = metrics.begin(); i != metrics.end(); ++i) {
1758 TempoMetric metric (*meter, *tempo);
1761 metric.set_start (prev->start());
1762 metric.set_frame (prev->frame());
1764 // metric will be at frames=0 bbt=1|1|0 by default
1765 // which is correct for our purpose
1768 BBTPointList::const_iterator bi = bbt_before_or_at ((*i)->frame());
1769 bbt_time ((*i)->frame(), bbt, bi);
1771 // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
1777 if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
1778 /* round up to next beat */
1784 if (bbt.beats != 1) {
1785 /* round up to next bar */
1791 // cerr << bbt << endl;
1793 (*i)->set_start (bbt);
1795 if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
1797 // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1798 } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
1800 // cerr << "NEW METER, frame = " << (*i)->frame() << " start = " << (*i)->start() <<endl;
1802 fatal << _("programming error: unhandled MetricSection type") << endmsg;
1809 recompute_map (true);
1813 PropertyChanged (PropertyChange ());
1816 /** Add some (fractional) beats to a session frame position, and return the result in frames.
1817 * pos can be -ve, if required.
1820 TempoMap::framepos_plus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1822 Glib::Threads::RWLock::ReaderLock lm (lock);
1823 Metrics::const_iterator next_tempo;
1824 const TempoSection* tempo = 0;
1826 /* Find the starting tempo metric */
1828 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
1830 const TempoSection* t;
1832 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
1834 /* This is a bit of a hack, but pos could be -ve, and if it is,
1835 we consider the initial metric changes (at time 0) to actually
1836 be in effect at pos.
1839 framepos_t f = (*next_tempo)->frame ();
1841 if (pos < 0 && f == 0) {
1855 tempo -> the Tempo for "pos"
1856 next_tempo -> first tempo after "pos", possibly metrics.end()
1859 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 plus %2 beats, start with tempo = %3 @ %4\n",
1860 pos, beats, *((Tempo*)tempo), tempo->frame()));
1864 /* Distance to the end of this section in frames */
1865 framecnt_t distance_frames = (next_tempo == metrics.end() ? max_framepos : ((*next_tempo)->frame() - pos));
1867 /* Distance to the end in beats */
1868 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1870 /* Amount to subtract this time */
1871 double const delta = min (distance_beats, beats);
1873 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1874 (next_tempo == metrics.end() ? max_framepos : (*next_tempo)->frame()),
1875 distance_frames, distance_beats));
1879 pos += delta * tempo->frames_per_beat (_frame_rate);
1881 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left\n", pos, beats));
1883 /* step forwards to next tempo section */
1885 if (next_tempo != metrics.end()) {
1887 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
1889 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1890 *((Tempo*)tempo), tempo->frame(),
1891 tempo->frames_per_beat (_frame_rate)));
1893 while (next_tempo != metrics.end ()) {
1897 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
1907 /** Subtract some (fractional) beats from a frame position, and return the result in frames */
1909 TempoMap::framepos_minus_beats (framepos_t pos, Evoral::MusicalTime beats) const
1911 Glib::Threads::RWLock::ReaderLock lm (lock);
1912 Metrics::const_reverse_iterator prev_tempo;
1913 const TempoSection* tempo = 0;
1915 /* Find the starting tempo metric */
1917 for (prev_tempo = metrics.rbegin(); prev_tempo != metrics.rend(); ++prev_tempo) {
1919 const TempoSection* t;
1921 if ((t = dynamic_cast<const TempoSection*>(*prev_tempo)) != 0) {
1923 /* This is a bit of a hack, but pos could be -ve, and if it is,
1924 we consider the initial metric changes (at time 0) to actually
1925 be in effect at pos.
1928 framepos_t f = (*prev_tempo)->frame ();
1930 if (pos < 0 && f == 0) {
1934 /* this is slightly more complex than the forward case
1935 because we reach the tempo in effect at pos after
1936 passing through pos (rather before, as in the
1937 forward case). having done that, we then need to
1938 keep going to get the previous tempo (or
1944 /* first tempo with position at or
1948 } else if (f < pos) {
1949 /* some other tempo section that
1950 is even earlier than 'tempo'
1958 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 minus %2 beats, start with tempo = %3 @ %4 prev at beg? %5\n",
1959 pos, beats, *((Tempo*)tempo), tempo->frame(),
1960 prev_tempo == metrics.rend()));
1964 tempo -> the Tempo for "pos"
1965 prev_tempo -> the first metric before "pos", possibly metrics.rend()
1970 /* Distance to the start of this section in frames */
1971 framecnt_t distance_frames = (pos - tempo->frame());
1973 /* Distance to the start in beats */
1974 Evoral::MusicalTime distance_beats = distance_frames / tempo->frames_per_beat (_frame_rate);
1976 /* Amount to subtract this time */
1977 double const sub = min (distance_beats, beats);
1979 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tdistance to %1 = %2 (%3 beats)\n",
1980 tempo->frame(), distance_frames, distance_beats));
1984 pos -= sub * tempo->frames_per_beat (_frame_rate);
1986 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnow at %1, %2 beats left, prev at end ? %3\n", pos, beats,
1987 (prev_tempo == metrics.rend())));
1989 /* step backwards to prior TempoSection */
1991 if (prev_tempo != metrics.rend()) {
1993 tempo = dynamic_cast<const TempoSection*>(*prev_tempo);
1995 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
1996 *((Tempo*)tempo), tempo->frame(),
1997 tempo->frames_per_beat (_frame_rate)));
1999 while (prev_tempo != metrics.rend ()) {
2003 if (prev_tempo != metrics.rend() && dynamic_cast<const TempoSection*>(*prev_tempo) != 0) {
2008 pos -= llrint (beats * tempo->frames_per_beat (_frame_rate));
2016 /** Add the BBT interval op to pos and return the result */
2018 TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
2020 Glib::Threads::RWLock::ReaderLock lm (lock);
2021 Metrics::const_iterator i;
2022 const MeterSection* meter;
2023 const MeterSection* m;
2024 const TempoSection* tempo;
2025 const TempoSection* t;
2026 double frames_per_beat;
2027 framepos_t effective_pos = max (pos, (framepos_t) 0);
2029 meter = &first_meter ();
2030 tempo = &first_tempo ();
2035 /* find the starting metrics for tempo & meter */
2037 for (i = metrics.begin(); i != metrics.end(); ++i) {
2039 if ((*i)->frame() > effective_pos) {
2043 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2045 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2052 meter -> the Meter for "pos"
2053 tempo -> the Tempo for "pos"
2054 i -> for first new metric after "pos", possibly metrics.end()
2057 /* now comes the complicated part. we have to add one beat a time,
2058 checking for a new metric on every beat.
2061 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2070 /* check if we need to use a new metric section: has adding frames moved us
2071 to or after the start of the next metric section? in which case, use it.
2074 if (i != metrics.end()) {
2075 if ((*i)->frame() <= pos) {
2077 /* about to change tempo or meter, so add the
2078 * number of frames for the bars we've just
2079 * traversed before we change the
2080 * frames_per_beat value.
2083 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2086 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2088 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2092 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2099 pos += llrint (frames_per_beat * (bars * meter->divisions_per_bar()));
2105 /* given the current meter, have we gone past the end of the bar ? */
2110 /* check if we need to use a new metric section: has adding frames moved us
2111 to or after the start of the next metric section? in which case, use it.
2114 if (i != metrics.end()) {
2115 if ((*i)->frame() <= pos) {
2117 /* about to change tempo or meter, so add the
2118 * number of frames for the beats we've just
2119 * traversed before we change the
2120 * frames_per_beat value.
2123 pos += llrint (beats * frames_per_beat);
2126 if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
2128 } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
2132 frames_per_beat = tempo->frames_per_beat (_frame_rate);
2137 pos += llrint (beats * frames_per_beat);
2140 if (op.ticks >= BBT_Time::ticks_per_beat) {
2141 pos += llrint (frames_per_beat + /* extra beat */
2142 (frames_per_beat * ((op.ticks % (uint32_t) BBT_Time::ticks_per_beat) /
2143 (double) BBT_Time::ticks_per_beat)));
2145 pos += llrint (frames_per_beat * (op.ticks / (double) BBT_Time::ticks_per_beat));
2152 /** Count the number of beats that are equivalent to distance when going forward,
2156 TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
2158 Glib::Threads::RWLock::ReaderLock lm (lock);
2159 Metrics::const_iterator next_tempo;
2160 const TempoSection* tempo = 0;
2161 framepos_t effective_pos = max (pos, (framepos_t) 0);
2163 /* Find the relevant initial tempo metric */
2165 for (next_tempo = metrics.begin(); next_tempo != metrics.end(); ++next_tempo) {
2167 const TempoSection* t;
2169 if ((t = dynamic_cast<const TempoSection*>(*next_tempo)) != 0) {
2171 if ((*next_tempo)->frame() > effective_pos) {
2181 tempo -> the Tempo for "pos"
2182 next_tempo -> the next tempo after "pos", possibly metrics.end()
2187 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("frame %1 walk by %2 frames, start with tempo = %3 @ %4\n",
2188 pos, distance, *((Tempo*)tempo), tempo->frame()));
2190 Evoral::MusicalTime beats = 0;
2194 /* End of this section */
2196 /* Distance to `end' in frames */
2197 framepos_t distance_to_end;
2199 if (next_tempo == metrics.end ()) {
2200 /* We can't do (end - pos) if end is max_framepos, as it will overflow if pos is -ve */
2202 distance_to_end = max_framepos;
2204 end = (*next_tempo)->frame ();
2205 distance_to_end = end - pos;
2208 /* Amount to subtract this time */
2209 double const sub = min (distance, distance_to_end);
2211 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("to reach end at %1 (end ? %2), distance= %3 sub=%4\n", end, (next_tempo == metrics.end()),
2212 distance_to_end, sub));
2218 beats += sub / tempo->frames_per_beat (_frame_rate);
2220 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("now at %1, beats = %2 distance left %3\n",
2221 pos, beats, distance));
2223 /* Move on if there's anything to move to */
2225 if (next_tempo != metrics.end()) {
2227 tempo = dynamic_cast<const TempoSection*>(*next_tempo);
2229 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("\tnew tempo = %1 @ %2 fpb = %3\n",
2230 *((Tempo*)tempo), tempo->frame(),
2231 tempo->frames_per_beat (_frame_rate)));
2233 while (next_tempo != metrics.end ()) {
2237 if (next_tempo != metrics.end() && dynamic_cast<const TempoSection*>(*next_tempo)) {
2242 if (next_tempo == metrics.end()) {
2243 DEBUG_TRACE (DEBUG::TempoMath, "no more tempo sections\n");
2245 DEBUG_TRACE (DEBUG::TempoMath, string_compose ("next tempo section is %1 @ %2\n",
2246 **next_tempo, (*next_tempo)->frame()));
2256 TempoMap::BBTPointList::const_iterator
2257 TempoMap::bbt_before_or_at (framepos_t pos)
2259 /* CALLER MUST HOLD READ LOCK */
2261 BBTPointList::const_iterator i;
2264 /* not really correct, but we should catch pos < 0 at a higher
2267 return _map.begin();
2270 i = lower_bound (_map.begin(), _map.end(), pos);
2271 assert (i != _map.end());
2272 if ((*i).frame > pos) {
2273 assert (i != _map.begin());
2280 bool operator() (const BBT_Time& a, const BBT_Time& b) {
2285 TempoMap::BBTPointList::const_iterator
2286 TempoMap::bbt_before_or_at (const BBT_Time& bbt)
2288 BBTPointList::const_iterator i;
2291 i = lower_bound (_map.begin(), _map.end(), bbt, cmp);
2292 assert (i != _map.end());
2293 if ((*i).bar > bbt.bars || (*i).beat > bbt.beats) {
2294 assert (i != _map.begin());
2300 TempoMap::BBTPointList::const_iterator
2301 TempoMap::bbt_after_or_at (framepos_t pos)
2303 /* CALLER MUST HOLD READ LOCK */
2305 BBTPointList::const_iterator i;
2307 if (_map.back().frame == pos) {
2309 assert (i != _map.begin());
2314 i = upper_bound (_map.begin(), _map.end(), pos);
2315 assert (i != _map.end());
2320 operator<< (std::ostream& o, const Meter& m) {
2321 return o << m.divisions_per_bar() << '/' << m.note_divisor();
2325 operator<< (std::ostream& o, const Tempo& t) {
2326 return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
2330 operator<< (std::ostream& o, const MetricSection& section) {
2332 o << "MetricSection @ " << section.frame() << " aka " << section.start() << ' ';
2334 const TempoSection* ts;
2335 const MeterSection* ms;
2337 if ((ts = dynamic_cast<const TempoSection*> (§ion)) != 0) {
2338 o << *((Tempo*) ts);
2339 } else if ((ms = dynamic_cast<const MeterSection*> (§ion)) != 0) {
2340 o << *((Meter*) ms);