diff options
Diffstat (limited to 'libs/ardour/tempo.cc')
| -rw-r--r-- | libs/ardour/tempo.cc | 224 |
1 files changed, 112 insertions, 112 deletions
diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc index 2ee0e456fc..623dd21627 100644 --- a/libs/ardour/tempo.cc +++ b/libs/ardour/tempo.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2000-2002 Paul Davis + Copyright (C) 2000-2002 Paul Davis This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -91,7 +91,7 @@ TempoSection::TempoSection (const XMLNode& node) error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg; throw failed_constructor(); } - + if ((prop = node.property ("note-type")) == 0) { /* older session, make note type be quarter by default */ _note_type = 4.0; @@ -117,7 +117,7 @@ TempoSection::get_state() const char buf[256]; LocaleGuard lg (X_("POSIX")); - snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32, + snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32, start().bars, start().beats, start().ticks); @@ -172,7 +172,7 @@ MeterSection::MeterSection (const XMLNode& node) error << _("MeterSection XML node has no \"note-type\" property") << endmsg; throw failed_constructor(); } - + if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 0.0) { error << _("MeterSection XML node has an illegal \"note-type\" value") << endmsg; throw failed_constructor(); @@ -193,7 +193,7 @@ MeterSection::get_state() const char buf[256]; LocaleGuard lg (X_("POSIX")); - snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32, + snprintf (buf, sizeof (buf), "%" PRIu32 "|%" PRIu32 "|%" PRIu32, start().bars, start().beats, start().ticks); @@ -222,7 +222,7 @@ TempoMap::TempoMap (nframes_t fr) _frame_rate = fr; last_bbt_valid = false; BBT_Time start; - + start.bars = 1; start.beats = 1; start.ticks = 0; @@ -234,7 +234,7 @@ TempoMap::TempoMap (nframes_t fr) m->set_movable (false); /* note: frame time is correct (zero) for both of these */ - + metrics->push_back (t); metrics->push_back (m); } @@ -262,7 +262,7 @@ TempoMap::move_metric_section (MetricSection& section, const BBT_Time& when) nframes_t prev_frame = round_to_type (frame, -1, Beat); nframes_t next_frame = round_to_type (frame, 1, Beat); - + // cerr << "previous beat at " << prev_frame << " next at " << next_frame << endl; /* use the closest beat */ @@ -272,7 +272,7 @@ TempoMap::move_metric_section (MetricSection& section, const BBT_Time& when) } else { frame = next_frame; } - + // cerr << "actual frame time = " << frame << endl; section.set_frame (frame); // cerr << "frame time = " << section.frame() << endl; @@ -369,7 +369,7 @@ TempoMap::do_insert (MetricSection* section, bool with_bbt) Metrics::iterator i; for (i = metrics->begin(); i != metrics->end(); ++i) { - + if (with_bbt) { if ((*i)->start() < section->start()) { continue; @@ -377,19 +377,19 @@ TempoMap::do_insert (MetricSection* section, bool with_bbt) } else { if ((*i)->frame() < section->frame()) { continue; - } + } } metrics->insert (i, section); break; } - + if (i == metrics->end()) { metrics->insert (metrics->end(), section); } - + timestamp_metrics (with_bbt); -} +} void TempoMap::add_tempo (const Tempo& tempo, BBT_Time where) @@ -398,9 +398,9 @@ TempoMap::add_tempo (const Tempo& tempo, BBT_Time where) Glib::RWLock::WriterLock lm (lock); /* new tempos always start on a beat */ - + where.ticks = 0; - + do_insert (new TempoSection (where, tempo.beats_per_minute(), tempo.note_type()), true); } @@ -423,10 +423,10 @@ TempoMap::replace_tempo (TempoSection& existing, const Tempo& replacement) { bool replaced = false; - { + { Glib::RWLock::WriterLock lm (lock); Metrics::iterator i; - + for (i = metrics->begin(); i != metrics->end(); ++i) { TempoSection *ts; @@ -441,7 +441,7 @@ TempoMap::replace_tempo (TempoSection& existing, const Tempo& replacement) } } } - + if (replaced) { StateChanged (Change (0)); } @@ -466,7 +466,7 @@ TempoMap::add_meter (const Meter& meter, BBT_Time where) } /* new meters *always* start on a beat. */ - + where.ticks = 0; do_insert (new MeterSection (where, meter.beats_per_bar(), meter.note_divisor()), true); @@ -491,14 +491,14 @@ TempoMap::replace_meter (MeterSection& existing, const Meter& replacement) { bool replaced = false; - { + { Glib::RWLock::WriterLock lm (lock); Metrics::iterator i; - + for (i = metrics->begin(); i != metrics->end(); ++i) { MeterSection *ms; if ((ms = dynamic_cast<MeterSection*>(*i)) != 0 && ms == &existing) { - + *((Meter*) ms) = replacement; replaced = true; @@ -507,7 +507,7 @@ TempoMap::replace_meter (MeterSection& existing, const Meter& replacement) } } } - + if (replaced) { StateChanged (Change (0)); } @@ -625,17 +625,17 @@ TempoMap::timestamp_metrics (bool use_bbt) BBT_Time end; for (i = metrics->begin(); i != metrics->end(); ++i) { - + end = (*i)->start(); - + section_frames = count_frames_between_metrics (*meter, *tempo, start, end); - + current += section_frames; - + start = end; - + (*i)->set_frame (current); - + if ((t = dynamic_cast<TempoSection*>(*i)) != 0) { tempo = t; } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) { @@ -657,7 +657,7 @@ TempoMap::timestamp_metrics (bool use_bbt) BBT_Time bbt; Metric metric (*meter, *tempo); - + if (prev) { metric.set_start (prev->start()); metric.set_frame (prev->frame()); @@ -665,20 +665,20 @@ TempoMap::timestamp_metrics (bool use_bbt) // metric will be at frames=0 bbt=1|1|0 by default // which is correct for our purpose } - + bbt_time_with_metric ((*i)->frame(), bbt, metric); // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => "; - + if (first) { first = false; } else { - + if (bbt.ticks > Meter::ticks_per_beat/2) { /* round up to next beat */ bbt.beats += 1; - } + } bbt.ticks = 0; @@ -688,9 +688,9 @@ TempoMap::timestamp_metrics (bool use_bbt) bbt.beats = 1; } } - + //s cerr << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << endl; - + (*i)->set_start (bbt); if ((t = dynamic_cast<TempoSection*>(*i)) != 0) { @@ -742,7 +742,7 @@ TempoMap::metric_at (nframes_t frame) const m.set_frame ((*i)->frame ()); m.set_start ((*i)->start ()); } - + return m; } @@ -773,7 +773,7 @@ TempoMap::metric_at (BBT_Time bbt) const } else if ((meter = dynamic_cast<const MeterSection*>(*i)) != 0) { m.set_meter (*meter); } - + m.set_frame ((*i)->frame ()); m.set_start (section_start); } @@ -842,10 +842,10 @@ TempoMap::bbt_time_with_metric (nframes_t frame, BBT_Time& bbt, const Metric& me // cerr << "-----\t RETURN " << bbt << endl; } -nframes_t +nframes_t TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) const { - /* for this to work with fractional measure types, start and end have to be "legal" BBT types, + /* for this to work with fractional measure types, start and end have to be "legal" BBT types, that means that the beats and ticks should be inside a bar */ @@ -857,17 +857,17 @@ TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) con uint32_t bar_offset = start.bars - m.start().bars; - double beat_offset = bar_offset*m.meter().beats_per_bar() - (m.start().beats-1) + (start.beats -1) + double beat_offset = bar_offset*m.meter().beats_per_bar() - (m.start().beats-1) + (start.beats -1) + start.ticks/Meter::ticks_per_beat; start_frame = m.frame() + (nframes_t) rint( beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter())); - m = metric_at(end); + m = metric_at(end); bar_offset = end.bars - m.start().bars; - beat_offset = bar_offset * m.meter().beats_per_bar() - (m.start().beats -1) + (end.beats - 1) + beat_offset = bar_offset * m.meter().beats_per_bar() - (m.start().beats -1) + (end.beats - 1) + end.ticks/Meter::ticks_per_beat; end_frame = m.frame() + (nframes_t) rint(beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter())); @@ -875,13 +875,13 @@ TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) con frames = end_frame - start_frame; return frames; - -} -nframes_t +} + +nframes_t TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo, const BBT_Time& start, const BBT_Time& end) const { - /* this is used in timestamping the metrics by actually counting the beats */ + /* this is used in timestamping the metrics by actually counting the beats */ nframes_t frames = 0; uint32_t bar = start.bars; @@ -896,7 +896,7 @@ TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo, frames = 0; while (bar < end.bars || (bar == end.bars && beat < end.beats)) { - + if (beat >= beats_per_bar) { beat = 1; ++bar; @@ -905,7 +905,7 @@ TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo, if (beat > beats_per_bar) { /* this is a fractional beat at the end of a fractional bar - so it should only count for the fraction + so it should only count for the fraction */ beats_counted -= (ceil(beats_per_bar) - beats_per_bar); @@ -917,18 +917,18 @@ TempoMap::count_frames_between_metrics (const Meter& meter, const Tempo& tempo, } } - // cerr << "Counted " << beats_counted << " from " << start << " to " << end - // << " bpb were " << beats_per_bar + // cerr << "Counted " << beats_counted << " from " << start << " to " << end + // << " bpb were " << beats_per_bar // << " fpb was " << beat_frames // << endl; - + frames = (nframes_t) floor (beats_counted * beat_frames); return frames; - -} -nframes_t +} + +nframes_t TempoMap::frame_time (const BBT_Time& bbt) const { BBT_Time start ; /* 1|1|0 */ @@ -936,7 +936,7 @@ TempoMap::frame_time (const BBT_Time& bbt) const return count_frames_between ( start, bbt); } -nframes_t +nframes_t TempoMap::bbt_duration_at (nframes_t pos, const BBT_Time& bbt, int dir) const { nframes_t frames = 0; @@ -952,7 +952,7 @@ TempoMap::bbt_duration_at (nframes_t pos, const BBT_Time& bbt, int dir) const return frames; } -nframes_t +nframes_t TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int dir) const { @@ -960,7 +960,7 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i double beats_per_bar; BBT_Time result; - + result.bars = max(1U, when.bars + dir * bbt.bars) ; result.beats = 1; result.ticks = 0; @@ -970,13 +970,13 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i - /*reduce things to legal bbt values + /*reduce things to legal bbt values we have to handle possible fractional=shorter beats at the end of measures and things like 0|11|9000 as a duration in a 4.5/4 measure - the musical decision is that the fractional beat is also a beat , although a shorter one + the musical decision is that the fractional beat is also a beat , although a shorter one */ - + if (dir >= 0) { result.beats = when.beats + bbt.beats; result.ticks = when.ticks + bbt.ticks; @@ -986,9 +986,9 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i result.beats -= (uint32_t) ceil(beats_per_bar); metric = metric_at(result); // maybe there is a meter change beats_per_bar = metric.meter().beats_per_bar(); - + } - /*we now counted the beats and landed in the target measure, now deal with ticks + /*we now counted the beats and landed in the target measure, now deal with ticks this seems complicated, but we want to deal with the corner case of a sequence of time signatures like 0.2/4-0.7/4 and with request like bbt = 3|2|9000 ,so we repeat the same loop but add ticks */ @@ -997,7 +997,7 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i */ uint32_t ticks_at_beat = (uint32_t) ( result.beats == ceil(beats_per_bar) ? - (1 - (ceil(beats_per_bar) - beats_per_bar))* Meter::ticks_per_beat + (1 - (ceil(beats_per_bar) - beats_per_bar))* Meter::ticks_per_beat : Meter::ticks_per_beat ); while (result.ticks >= ticks_at_beat) { @@ -1010,30 +1010,30 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i beats_per_bar = metric.meter().beats_per_bar(); } ticks_at_beat= (uint32_t) ( result.beats == ceil(beats_per_bar) ? - (1 - (ceil(beats_per_bar) - beats_per_bar) ) * Meter::ticks_per_beat + (1 - (ceil(beats_per_bar) - beats_per_bar) ) * Meter::ticks_per_beat : Meter::ticks_per_beat); } - + } else { uint32_t b = bbt.beats; /* count beats */ while( b > when.beats ) { - + result.bars = max(1U,result.bars-- ) ; metric = metric_at(result); // maybe there is a meter change beats_per_bar = metric.meter().beats_per_bar(); if (b >= ceil(beats_per_bar)) { - + b -= (uint32_t) ceil(beats_per_bar); } else { b = (uint32_t) ceil(beats_per_bar) - b + when.beats ; } } result.beats = when.beats - b; - + /*count ticks */ if (bbt.ticks <= when.ticks) { @@ -1055,9 +1055,9 @@ TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, i result.beats --; ticks_at_beat = (uint32_t) Meter::ticks_per_beat; } - + if (t <= ticks_at_beat) { - result.ticks = ticks_at_beat - t; + result.ticks = ticks_at_beat - t; } else { t-= ticks_at_beat; } @@ -1111,14 +1111,14 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num, int dir) ticks_one_subdivisions_worth = (uint32_t)Meter::ticks_per_beat / sub_num; ticks_one_half_subdivisions_worth = ticks_one_subdivisions_worth / 2; - + if (dir > 0) { - + /* round to next */ uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth; - if (mod == 0) { + if (mod == 0) { /* right on the subdivision, so the difference is just the subdivision ticks */ difference = ticks_one_subdivisions_worth; @@ -1132,7 +1132,7 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num, int dir) the_beat.beats++; the_beat.ticks += difference; the_beat.ticks -= (uint32_t)Meter::ticks_per_beat; - } else { + } else { the_beat.ticks += difference; } @@ -1142,7 +1142,7 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num, int dir) uint32_t mod = the_beat.ticks % ticks_one_subdivisions_worth; - if (mod == 0) { + if (mod == 0) { /* right on the subdivision, so the difference is just the subdivision ticks */ difference = ticks_one_subdivisions_worth; cerr << "On the sub, move by 1 sub = " << difference << endl; @@ -1163,12 +1163,12 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num, int dir) << (uint32_t)Meter::ticks_per_beat - difference << endl; the_beat.beats--; the_beat.ticks = (uint32_t)Meter::ticks_per_beat - difference; - } else { + } else { cerr << " reduce ticks\n"; the_beat.ticks -= difference; } - } else { + } else { /* round to nearest */ if (the_beat.ticks % ticks_one_subdivisions_worth > ticks_one_half_subdivisions_worth) { @@ -1177,7 +1177,7 @@ TempoMap::round_to_beat_subdivision (nframes_t fr, int sub_num, int dir) the_beat.beats++; the_beat.ticks += difference; the_beat.ticks -= (uint32_t)Meter::ticks_per_beat; - } else { + } else { the_beat.ticks += difference; } } else { @@ -1217,7 +1217,7 @@ TempoMap::round_to_type (nframes_t frame, int dir, BBTPointType type) bbt.beats = 1; bbt.ticks = 0; break; - + case Beat: if (dir < 0) { if (bbt.beats > 1) { @@ -1240,15 +1240,15 @@ TempoMap::round_to_type (nframes_t frame, int dir, BBTPointType type) } bbt.ticks = 0; break; - + } - + /* cerr << "for " << frame << " round to " << bbt << " using " << metric.start() << endl; */ - + return metric.frame() + count_frames_between (metric.start(), bbt); } @@ -1293,7 +1293,7 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const } /* We now have: - + meter -> the Meter for "lower" tempo -> the Tempo for "lower" i -> for first new metric after "lower", possibly metrics->end() @@ -1304,7 +1304,7 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const beats_per_bar = meter->beats_per_bar (); frames_per_bar = meter->frames_per_bar (*tempo, _frame_rate); beat_frames = tempo->frames_per_beat (_frame_rate, *meter); - + if (meter->frame() > tempo->frame()) { bar = meter->start().bars; beat = meter->start().beats; @@ -1319,7 +1319,7 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const lower frame bound passed in. assumes that current is initialized above to be on a beat. */ - + delta_bars = (lower-current) / frames_per_bar; delta_beats = modf(delta_bars, &dummy) * beats_per_bar; current += (floor(delta_bars) * frames_per_bar) + (floor(delta_beats) * beat_frames); @@ -1329,21 +1329,21 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const beat += (uint32_t) (floor(delta_beats)); points = new BBTPointList; - + do { if (i == metrics->end()) { limit = upper; // cerr << "== limit set to end of request @ " << limit << endl; } else { - // cerr << "== limit set to next metric @ " << (*i)->frame() << endl; + // cerr << "== limit set to next metric @ " << (*i)->frame() << endl; limit = (*i)->frame(); } limit = min (limit, upper); while (current < limit) { - + /* if we're at the start of a bar, add bar point */ if (beat == 1) { @@ -1365,7 +1365,7 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const } beat_frame += beat_frames; current+= beat_frames; - + beat++; } @@ -1386,8 +1386,8 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const just filled had 10 beat marks, but the bar end is 1/2 beat before the last beat mark. - And it is also possible that a tempo - change occured in the middle of a bar, + And it is also possible that a tempo + change occured in the middle of a bar, so we subtract the possible extra fraction from the current */ @@ -1402,8 +1402,8 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const } bar++; beat = 1; - } - + } + } /* if we're done, then we're done */ @@ -1432,14 +1432,14 @@ TempoMap::get_points (nframes_t lower, nframes_t upper) const beats_per_bar = meter->beats_per_bar (); frames_per_bar = meter->frames_per_bar (*tempo, _frame_rate); beat_frames = tempo->frames_per_beat (_frame_rate, *meter); - + ++i; } } while (1); return points; -} +} const TempoSection& TempoMap::tempo_section_at (nframes_t frame) @@ -1447,7 +1447,7 @@ TempoMap::tempo_section_at (nframes_t frame) Glib::RWLock::ReaderLock lm (lock); Metrics::iterator i; TempoSection* prev = 0; - + for (i = metrics->begin(); i != metrics->end(); ++i) { TempoSection* t; @@ -1508,32 +1508,32 @@ TempoMap::set_state (const XMLNode& node) XMLNodeList nlist; XMLNodeConstIterator niter; Metrics old_metrics (*metrics); - + metrics->clear(); nlist = node.children(); - + for (niter = nlist.begin(); niter != nlist.end(); ++niter) { XMLNode* child = *niter; - + if (child->name() == TempoSection::xml_state_node_name) { - + try { metrics->push_back (new TempoSection (*child)); } - + catch (failed_constructor& err){ error << _("Tempo map: could not set new state, restoring old one.") << endmsg; *metrics = old_metrics; break; } - + } else if (child->name() == MeterSection::xml_state_node_name) { - + try { metrics->push_back (new MeterSection (*child)); } - + catch (failed_constructor& err) { error << _("Tempo map: could not set new state, restoring old one.") << endmsg; *metrics = old_metrics; @@ -1541,15 +1541,15 @@ TempoMap::set_state (const XMLNode& node) } } } - + if (niter == nlist.end()) { - + MetricSectionSorter cmp; metrics->sort (cmp); timestamp_metrics (true); } } - + StateChanged (Change (0)); return 0; @@ -1560,14 +1560,14 @@ TempoMap::dump (std::ostream& o) const { const MeterSection* m; const TempoSection* t; - + for (Metrics::const_iterator i = metrics->begin(); i != metrics->end(); ++i) { if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) { o << "Tempo @ " << *i << ' ' << t->beats_per_minute() << " BPM (denom = " << t->note_type() << ") at " << t->start() << " frame= " << t->frame() << " (move? " << t->movable() << ')' << endl; } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) { - o << "Meter @ " << *i << ' ' << m->beats_per_bar() << '/' << m->note_divisor() << " at " << m->start() << " frame= " << m->frame() + o << "Meter @ " << *i << ' ' << m->beats_per_bar() << '/' << m->note_divisor() << " at " << m->start() << " frame= " << m->frame() << " (move? " << m->movable() << ')' << endl; } } @@ -1613,6 +1613,6 @@ TempoMap::insert_time (nframes_t where, nframes_t amount) } timestamp_metrics (false); - + StateChanged (Change (0)); } |