#include <cmath>
-#include <sigc++/bind.h>
#include <glibmm/thread.h>
#include "pbd/xml++.h"
using namespace ARDOUR;
using namespace PBD;
+using Timecode::BBT_Time;
+
/* _default tempo is 4/4 qtr=120 */
Meter TempoMap::_default_meter (4.0, 4.0);
Tempo TempoMap::_default_tempo (120.0);
-const double Meter::ticks_per_beat = 1920.0;
-
-double Tempo::frames_per_beat (nframes_t sr, const Meter& meter) const
+double Tempo::frames_per_beat (framecnt_t sr, const Meter& meter) const
{
return ((60.0 * sr) / (_beats_per_minute * meter.note_divisor()/_note_type));
}
/***********************************************************************/
double
-Meter::frames_per_bar (const Tempo& tempo, nframes_t sr) const
+Meter::frames_per_bar (const Tempo& tempo, framecnt_t sr) const
{
return ((60.0 * sr * _beats_per_bar) / (tempo.beats_per_minute() * _note_type/tempo.note_type()));
}
}
};
-TempoMap::TempoMap (nframes64_t fr)
+TempoMap::TempoMap (framecnt_t fr)
{
metrics = new Metrics;
_frame_rate = fr;
/* position by audio frame, then recompute BBT timestamps from the audio ones */
- nframes64_t frame = frame_time (when);
+ framepos_t frame = frame_time (when);
// cerr << "nominal frame time = " << frame << endl;
- nframes64_t prev_frame = round_to_type (frame, -1, Beat);
- nframes64_t next_frame = round_to_type (frame, 1, Beat);
+ framepos_t prev_frame = round_to_type (frame, -1, Beat);
+ framepos_t next_frame = round_to_type (frame, 1, Beat);
// cerr << "previous beat at " << prev_frame << " next at " << next_frame << endl;
TempoMap::move_tempo (TempoSection& tempo, const BBT_Time& when)
{
if (move_metric_section (tempo, when) == 0) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
TempoMap::move_meter (MeterSection& meter, const BBT_Time& when)
{
if (move_metric_section (meter, when) == 0) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
}
if (removed) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
}
if (removed) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
{
Metrics::iterator i;
+ /* Look for any existing MetricSection that is of the same type and
+ at the same time as the new one, and remove it before adding
+ the new one.
+ */
+
+ Metrics::iterator to_remove = metrics->end ();
+
for (i = metrics->begin(); i != metrics->end(); ++i) {
- if (with_bbt) {
- if ((*i)->start() < section->start()) {
- continue;
- }
- } else {
- if ((*i)->frame() < section->frame()) {
- continue;
- }
+ int const c = (*i)->compare (section, with_bbt);
+
+ if (c < 0) {
+ /* this section is before the one to be added; go back round */
+ continue;
+ } else if (c > 0) {
+ /* this section is after the one to be added; there can't be any at the same time */
+ break;
+ }
+
+ /* hacky comparison of type */
+ bool const a = dynamic_cast<TempoSection*> (*i) != 0;
+ bool const b = dynamic_cast<TempoSection*> (section) != 0;
+
+ if (a == b) {
+ to_remove = i;
+ break;
+ }
+ }
+
+ if (to_remove != metrics->end()) {
+ /* remove the MetricSection at the same time as the one we are about to add */
+ metrics->erase (to_remove);
+ }
+
+ /* Add the given MetricSection */
+
+ for (i = metrics->begin(); i != metrics->end(); ++i) {
+
+ if ((*i)->compare (section, with_bbt) < 0) {
+ continue;
}
metrics->insert (i, section);
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);
}
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
void
-TempoMap::add_tempo (const Tempo& tempo, nframes64_t where)
+TempoMap::add_tempo (const Tempo& tempo, framepos_t where)
{
{
Glib::RWLock::WriterLock lm (lock);
do_insert (new TempoSection (where, tempo.beats_per_minute(), tempo.note_type()), false);
}
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
void
}
if (replaced) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
}
/* new meters *always* start on a beat. */
-
where.ticks = 0;
do_insert (new MeterSection (where, meter.beats_per_bar(), meter.note_divisor()), true);
}
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
void
-TempoMap::add_meter (const Meter& meter, nframes64_t where)
+TempoMap::add_meter (const Meter& meter, framepos_t where)
{
{
Glib::RWLock::WriterLock lm (lock);
do_insert (new MeterSection (where, meter.beats_per_bar(), meter.note_divisor()), false);
}
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
void
}
if (replaced) {
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
}
for (Metrics::iterator i = metrics->begin(); i != metrics->end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
*((Tempo*) t) = newtempo;
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
break;
}
}
}
void
-TempoMap::change_existing_tempo_at (nframes64_t where, double beats_per_minute, double note_type)
+TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
{
Tempo newtempo (beats_per_minute, note_type);
/* reset */
*((Tempo*)prev) = newtempo;
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
const MeterSection&
// cerr << "\n\n\n ######################\nTIMESTAMP via BBT ##############\n" << endl;
- nframes64_t current = 0;
- nframes64_t section_frames;
+ framepos_t current = 0;
+ framepos_t section_frames;
BBT_Time start;
BBT_Time end;
first = false;
} else {
- if (bbt.ticks > Meter::ticks_per_beat/2) {
+ if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
/* round up to next beat */
bbt.beats += 1;
}
}
TempoMetric
-TempoMap::metric_at (nframes64_t frame) const
+TempoMap::metric_at (framepos_t frame) const
{
TempoMetric m (first_meter(), first_tempo());
const Meter* meter;
}
void
-TempoMap::bbt_time (nframes64_t frame, BBT_Time& bbt) const
+TempoMap::bbt_time (framepos_t frame, BBT_Time& bbt) const
{
{
Glib::RWLock::ReaderLock lm (lock);
}
void
-TempoMap::bbt_time_unlocked (nframes64_t frame, BBT_Time& bbt) const
+TempoMap::bbt_time_unlocked (framepos_t frame, BBT_Time& bbt) const
{
bbt_time_with_metric (frame, bbt, metric_at (frame));
}
void
-TempoMap::bbt_time_with_metric (nframes64_t frame, BBT_Time& bbt, const TempoMetric& metric) const
+TempoMap::bbt_time_with_metric (framepos_t frame, BBT_Time& bbt, const TempoMetric& metric) const
{
- nframes64_t frame_diff;
+ framecnt_t frame_diff;
// cerr << "---- BBT time for " << frame << " using metric @ " << metric.frame() << " BBT " << metric.start() << endl;
const double beats_per_bar = metric.meter().beats_per_bar();
- const double ticks_per_frame = metric.tempo().frames_per_beat (_frame_rate, metric.meter()) / Meter::ticks_per_beat;
+ const double ticks_per_frame = metric.tempo().frames_per_beat (_frame_rate, metric.meter()) / BBT_Time::ticks_per_beat;
/* now compute how far beyond that point we actually are. */
frame_diff = frame - metric.frame();
bbt.ticks = metric.start().ticks + (uint32_t)round((double)frame_diff / ticks_per_frame);
- uint32_t xtra_beats = bbt.ticks / (uint32_t)Meter::ticks_per_beat;
- bbt.ticks %= (uint32_t)Meter::ticks_per_beat;
+ uint32_t xtra_beats = bbt.ticks / (uint32_t)BBT_Time::ticks_per_beat;
+ bbt.ticks %= (uint32_t)BBT_Time::ticks_per_beat;
bbt.beats = metric.start().beats + xtra_beats - 1; // correction for 1-based counting, see below for matching operation.
bbt.bars = metric.start().bars + (uint32_t)floor((double)bbt.beats / beats_per_bar);
this will also behave badly in the case of meters like
0.1/4, but I can't be bothered to test that.
*/
- uint32_t ticks_on_last_beat = (uint32_t)floor(Meter::ticks_per_beat * beat_fraction);
+ uint32_t ticks_on_last_beat = (uint32_t)floor(BBT_Time::ticks_per_beat * beat_fraction);
if (bbt.beats > (uint32_t)floor(beats_per_bar) && bbt.ticks >= ticks_on_last_beat) {
bbt.ticks -= ticks_on_last_beat;
// cerr << "-----\t RETURN " << bbt << endl;
}
-nframes64_t
-TempoMap::count_frames_between ( const BBT_Time& start, const BBT_Time& end) const
+framecnt_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,
that means that the beats and ticks should be inside a bar
*/
- nframes64_t frames = 0;
- nframes64_t start_frame = 0;
- nframes64_t end_frame = 0;
+ framecnt_t frames = 0;
+ framepos_t start_frame = 0;
+ framepos_t end_frame = 0;
TempoMetric m = metric_at (start);
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)
- + start.ticks/Meter::ticks_per_beat;
+ + start.ticks/BBT_Time::ticks_per_beat;
- start_frame = m.frame() + (nframes64_t) rint( beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter()));
+ start_frame = m.frame() + (framepos_t) rint( beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter()));
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)
- + end.ticks/Meter::ticks_per_beat;
+ + end.ticks/BBT_Time::ticks_per_beat;
- end_frame = m.frame() + (nframes64_t) rint(beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter()));
+ end_frame = m.frame() + (framepos_t) rint(beat_offset * m.tempo().frames_per_beat(_frame_rate, m.meter()));
frames = end_frame - start_frame;
}
-nframes64_t
+framecnt_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 */
- nframes64_t frames = 0;
+ framecnt_t frames = 0;
uint32_t bar = start.bars;
double beat = (double) start.beats;
double beats_counted = 0;
// << " fpb was " << beat_frames
// << endl;
- frames = (nframes64_t) floor (beats_counted * beat_frames);
+ frames = (framecnt_t) llrint (floor (beats_counted * beat_frames));
return frames;
}
-nframes64_t
+framepos_t
TempoMap::frame_time (const BBT_Time& bbt) const
{
BBT_Time start ; /* 1|1|0 */
return count_frames_between ( start, bbt);
}
-nframes64_t
-TempoMap::bbt_duration_at (nframes64_t pos, const BBT_Time& bbt, int dir) const
+framecnt_t
+TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir) const
{
- nframes64_t frames = 0;
+ framecnt_t frames = 0;
BBT_Time when;
bbt_time(pos, when);
return frames;
}
-nframes64_t
+framecnt_t
TempoMap::bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int dir) const
{
-
- nframes64_t frames = 0;
+ framecnt_t frames = 0;
double beats_per_bar;
BBT_Time result;
*/
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
- : Meter::ticks_per_beat );
+ (1 - (ceil(beats_per_bar) - beats_per_bar))* BBT_Time::ticks_per_beat
+ : BBT_Time::ticks_per_beat );
while (result.ticks >= ticks_at_beat) {
result.beats++;
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
- : Meter::ticks_per_beat);
+ (1 - (ceil(beats_per_bar) - beats_per_bar) ) * BBT_Time::ticks_per_beat
+ : BBT_Time::ticks_per_beat);
}
result.ticks = when.ticks - bbt.ticks;
} else {
- uint32_t ticks_at_beat= (uint32_t) Meter::ticks_per_beat;
+ uint32_t ticks_at_beat= (uint32_t) BBT_Time::ticks_per_beat;
uint32_t t = bbt.ticks - when.ticks;
do {
metric = metric_at(result); // maybe there is a meter change
beats_per_bar = metric.meter().beats_per_bar();
result.beats = (uint32_t) ceil(beats_per_bar);
- ticks_at_beat = (uint32_t) ((1 - (ceil(beats_per_bar) - beats_per_bar)) * Meter::ticks_per_beat) ;
+ ticks_at_beat = (uint32_t) ((1 - (ceil(beats_per_bar) - beats_per_bar)) * BBT_Time::ticks_per_beat) ;
} else {
result.beats --;
- ticks_at_beat = (uint32_t) Meter::ticks_per_beat;
+ ticks_at_beat = (uint32_t) BBT_Time::ticks_per_beat;
}
if (t <= ticks_at_beat) {
-nframes64_t
-TempoMap::round_to_bar (nframes64_t fr, int dir)
+framepos_t
+TempoMap::round_to_bar (framepos_t fr, int dir)
{
{
Glib::RWLock::ReaderLock lm (lock);
}
-nframes64_t
-TempoMap::round_to_beat (nframes64_t fr, int dir)
+framepos_t
+TempoMap::round_to_beat (framepos_t fr, int dir)
{
{
Glib::RWLock::ReaderLock lm (lock);
}
}
-nframes64_t
-TempoMap::round_to_beat_subdivision (nframes64_t fr, int sub_num, int dir)
+framepos_t
+TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, int dir)
{
-
BBT_Time the_beat;
uint32_t ticks_one_half_subdivisions_worth;
uint32_t ticks_one_subdivisions_worth;
bbt_time(fr, the_beat);
- ticks_one_subdivisions_worth = (uint32_t)Meter::ticks_per_beat / sub_num;
+ ticks_one_subdivisions_worth = (uint32_t)BBT_Time::ticks_per_beat / sub_num;
ticks_one_half_subdivisions_worth = ticks_one_subdivisions_worth / 2;
if (dir > 0) {
difference = ticks_one_subdivisions_worth - mod;
}
- if (the_beat.ticks + difference >= (uint32_t)Meter::ticks_per_beat) {
- the_beat.beats++;
- the_beat.ticks += difference;
- the_beat.ticks -= (uint32_t)Meter::ticks_per_beat;
- } else {
- the_beat.ticks += difference;
- }
+ the_beat = bbt_add (the_beat, BBT_Time (0, 0, difference));
} else if (dir < 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;
} else {
/* not on subdivision, compute distance to previous subdivision, which
is just the modulus.
*/
difference = mod;
- cerr << "off the sub, move by 1 sub = " << difference << endl;
}
-
- cerr << "ticks = " << the_beat.ticks << endl;
-
- if (the_beat.ticks < difference) {
- cerr << "backup beats, set ticks to "
- << (uint32_t)Meter::ticks_per_beat - difference << endl;
- the_beat.beats--;
- the_beat.ticks = (uint32_t)Meter::ticks_per_beat - difference;
- } else {
- cerr << " reduce ticks\n";
- the_beat.ticks -= difference;
- }
+ try {
+ the_beat = bbt_subtract (the_beat, BBT_Time (0, 0, difference));
+ } catch (...) {
+ /* can't go backwards from wherever pos is, so just return it */
+ return fr;
+ }
+
} else {
/* round to nearest */
if (the_beat.ticks % ticks_one_subdivisions_worth > ticks_one_half_subdivisions_worth) {
difference = ticks_one_subdivisions_worth - (the_beat.ticks % ticks_one_subdivisions_worth);
- if (the_beat.ticks + difference >= (uint32_t)Meter::ticks_per_beat) {
- the_beat.beats++;
- the_beat.ticks += difference;
- the_beat.ticks -= (uint32_t)Meter::ticks_per_beat;
- } else {
- the_beat.ticks += difference;
- }
+ the_beat = bbt_add (the_beat, BBT_Time (0, 0, difference));
} else {
// difference = ticks_one_subdivisions_worth - (the_beat.ticks % ticks_one_subdivisions_worth);
the_beat.ticks -= the_beat.ticks % ticks_one_subdivisions_worth;
return frame_time (the_beat);
}
-nframes64_t
-TempoMap::round_to_type (nframes64_t frame, int dir, BBTPointType type)
+framepos_t
+TempoMap::round_to_type (framepos_t frame, int dir, BBTPointType type)
{
TempoMetric metric = metric_at (frame);
BBT_Time bbt;
switch (type) {
case Bar:
- DEBUG_TRACE(DEBUG::SnapBBT, string_compose ("round from %1 (%3) to bars in direction %2\n", frame, (dir < 0 ? "back" : "forward"), bbt));
+ DEBUG_TRACE(DEBUG::SnapBBT, string_compose ("round from %1 (%3) to bars in direction %2\n", frame, dir, bbt));
if (dir < 0) {
/* "true" rounding */
- /* round to nearest beat */
- if (bbt.ticks >= (Meter::ticks_per_beat/2)) {
- try {
- bbt = bbt_add (bbt, one_beat, metric);
- }
- catch (...) {
- return frame;
- }
- }
+ float midbar_beats;
+ float midbar_ticks;
- /* round to nearest bar */
- if (bbt.beats >= metric.meter().beats_per_bar()/2) {
- try {
- bbt = bbt_add (bbt, one_bar, metric);
- }
- catch (...) {
- return frame;
- }
- }
+ midbar_beats = metric.meter().beats_per_bar() / 2 + 1;
+ midbar_ticks = BBT_Time::ticks_per_beat * fmod (midbar_beats, 1.0f);
+ midbar_beats = floor (midbar_beats);
+
+ BBT_Time midbar (bbt.bars, lrintf (midbar_beats), lrintf (midbar_ticks));
+
+ if (bbt < midbar) {
+ /* round down */
+ bbt.beats = 1;
+ bbt.ticks = 0;
+ } else {
+ /* round up */
+ bbt.bars++;
+ bbt.beats = 1;
+ bbt.ticks = 0;
+ }
}
/* force beats & ticks to their values at the start of a bar */
bbt.beats = 1;
/* "true" rounding */
/* round to nearest beat */
- if (bbt.ticks >= (Meter::ticks_per_beat/2)) {
+ if (bbt.ticks >= (BBT_Time::ticks_per_beat/2)) {
try {
bbt = bbt_add (bbt, one_beat, metric);
}
TempoMap::BBTPointList *
-TempoMap::get_points (nframes64_t lower, nframes64_t upper) const
+TempoMap::get_points (framepos_t lower, framepos_t upper) const
{
Metrics::const_iterator i;
double delta_bars;
double delta_beats;
double dummy;
- nframes64_t limit;
+ framepos_t limit;
meter = &first_meter ();
tempo = &first_tempo ();
if (beat == 1) {
if (current >= lower) {
// cerr << "Add Bar at " << bar << "|1" << " @ " << current << endl;
- points->push_back (BBTPoint (*meter, *tempo,(nframes64_t)rint(current), Bar, bar, 1));
+ points->push_back (BBTPoint (*meter, *tempo,(framepos_t)rint(current), Bar, bar, 1));
}
}
while (beat <= ceil( beats_per_bar) && beat_frame < limit) {
if (beat_frame >= lower) {
// cerr << "Add Beat at " << bar << '|' << beat << " @ " << beat_frame << endl;
- points->push_back (BBTPoint (*meter, *tempo, (nframes64_t) rint(beat_frame), Beat, bar, beat));
+ points->push_back (BBTPoint (*meter, *tempo, (framepos_t) rint(beat_frame), Beat, bar, beat));
}
beat_frame += beat_frames;
current+= beat_frames;
}
const TempoSection&
-TempoMap::tempo_section_at (nframes64_t frame)
+TempoMap::tempo_section_at (framepos_t frame) const
{
Glib::RWLock::ReaderLock lm (lock);
- Metrics::iterator i;
+ Metrics::const_iterator i;
TempoSection* prev = 0;
for (i = metrics->begin(); i != metrics->end(); ++i) {
}
const Tempo&
-TempoMap::tempo_at (nframes64_t frame) const
+TempoMap::tempo_at (framepos_t frame) const
{
TempoMetric m (metric_at (frame));
return m.tempo();
const Meter&
-TempoMap::meter_at (nframes64_t frame) const
+TempoMap::meter_at (framepos_t frame) const
{
TempoMetric m (metric_at (frame));
return m.meter();
}
}
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
return 0;
}
}
void
-TempoMap::insert_time (nframes64_t where, nframes64_t amount)
+TempoMap::insert_time (framepos_t where, framecnt_t amount)
{
for (Metrics::iterator i = metrics->begin(); i != metrics->end(); ++i) {
if ((*i)->frame() >= where) {
timestamp_metrics (false);
- StateChanged (Change (0));
+ PropertyChanged (PropertyChange ());
}
BBT_Time
return bbt_add (start, other, metric);
}
+/**
+ * add the BBT interval @param increment to @param start and return the result
+ */
BBT_Time
-TempoMap::bbt_add (const BBT_Time& start, const BBT_Time& other, const TempoMetric& metric) const
+TempoMap::bbt_add (const BBT_Time& start, const BBT_Time& increment, const TempoMetric& /*metric*/) const
{
BBT_Time result = start;
- BBT_Time op = op;
+ BBT_Time op = increment; /* argument is const, but we need to modify it */
uint32_t ticks = result.ticks + op.ticks;
- if (ticks >= Meter::ticks_per_beat) {
+ if (ticks >= BBT_Time::ticks_per_beat) {
op.beats++;
- result.ticks = ticks % (uint32_t) Meter::ticks_per_beat;
- }
+ result.ticks = ticks % (uint32_t) BBT_Time::ticks_per_beat;
+ } else {
+ result.ticks += op.ticks;
+ }
/* now comes the complicated part. we have to add one beat a time,
checking for a new metric on every beat.
return result;
}
+/**
+ * subtract the BBT interval @param decrement from @param start and return the result
+ */
BBT_Time
-TempoMap::bbt_subtract (const BBT_Time& start, const BBT_Time& other) const
+TempoMap::bbt_subtract (const BBT_Time& start, const BBT_Time& decrement) const
{
BBT_Time result = start;
- BBT_Time op = other;
+ BBT_Time op = decrement; /* argument is const, but we need to modify it */
if (op.ticks > result.ticks) {
/* subtract an extra beat later; meanwhile set ticks to the right "carry" value */
op.beats++;
- result.ticks = Meter::ticks_per_beat - (op.ticks - result.ticks);
+ result.ticks = BBT_Time::ticks_per_beat - (op.ticks - result.ticks);
} else {
result.ticks -= op.ticks;
}
*/
const MeterSection* meter = 0;
- list<const MeterSection*>::const_reverse_iterator next_meter;
+ list<const MeterSection*>::reverse_iterator next_meter; // older versions of GCC don't
+ // support const_reverse_iterator::operator!=()
for (next_meter = meter_sections.rbegin(); next_meter != meter_sections.rend(); ++next_meter) {
result.bars -= op.bars;
return result;
}
+
+/** Add the BBT interval op to pos and return the result */
+framepos_t
+TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
+{
+ Metrics::const_iterator i;
+ const MeterSection* meter;
+ const MeterSection* m;
+ const TempoSection* tempo;
+ const TempoSection* t;
+ framecnt_t frames_per_beat;
+
+ meter = &first_meter ();
+ tempo = &first_tempo ();
+
+ assert (meter);
+ assert (tempo);
+
+ /* find the starting metrics for tempo & meter */
+
+ for (i = metrics->begin(); i != metrics->end(); ++i) {
+
+ if ((*i)->frame() > pos) {
+ break;
+ }
+
+ if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
+ tempo = t;
+ } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
+ meter = m;
+ }
+ }
+
+ /* We now have:
+
+ meter -> the Meter for "pos"
+ tempo -> the Tempo for "pos"
+ i -> for first new metric after "pos", possibly metrics->end()
+ */
+
+ /* now comes the complicated part. we have to add one beat a time,
+ checking for a new metric on every beat.
+ */
+
+ frames_per_beat = tempo->frames_per_beat (_frame_rate, *meter);
+
+ while (op.bars) {
+
+ pos += llrint (frames_per_beat * meter->beats_per_bar());
+ op.bars--;
+
+ /* check if we need to use a new metric section: has adding frames moved us
+ to or after the start of the next metric section? in which case, use it.
+ */
+
+ if (i != metrics->end()) {
+ if ((*i)->frame() <= pos) {
+
+ if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
+ tempo = t;
+ } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
+ meter = m;
+ }
+ ++i;
+ frames_per_beat = tempo->frames_per_beat (_frame_rate, *meter);
+
+ }
+ }
+
+ }
+
+ while (op.beats) {
+
+ /* given the current meter, have we gone past the end of the bar ? */
+
+ pos += frames_per_beat;
+ op.beats--;
+
+ /* check if we need to use a new metric section: has adding frames moved us
+ to or after the start of the next metric section? in which case, use it.
+ */
+
+ if (i != metrics->end()) {
+ if ((*i)->frame() <= pos) {
+
+ if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
+ tempo = t;
+ } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
+ meter = m;
+ }
+ ++i;
+ frames_per_beat = tempo->frames_per_beat (_frame_rate, *meter);
+ }
+ }
+ }
+
+ if (op.ticks) {
+ if (op.ticks >= BBT_Time::ticks_per_beat) {
+ pos += frames_per_beat;
+ pos += llrint (frames_per_beat * ((op.ticks % (uint32_t) BBT_Time::ticks_per_beat) / (double) BBT_Time::ticks_per_beat));
+ } else {
+ pos += llrint (frames_per_beat * (op.ticks / (double) BBT_Time::ticks_per_beat));
+ }
+ }
+
+ return pos;
+}
+
+/** Count the number of beats that are equivalent to distance when starting at pos */
+double
+TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
+{
+ Metrics::const_iterator i;
+ double beats = 0;
+ const MeterSection* meter;
+ const MeterSection* m;
+ const TempoSection* tempo;
+ const TempoSection* t;
+ double frames_per_beat;
+
+ double ddist = distance;
+ double dpos = pos;
+
+ meter = &first_meter ();
+ tempo = &first_tempo ();
+
+ assert (meter);
+ assert (tempo);
+
+ /* find the starting metrics for tempo & meter */
+
+ for (i = metrics->begin(); i != metrics->end(); ++i) {
+
+ if ((*i)->frame() > pos) {
+ break;
+ }
+
+ if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
+ tempo = t;
+ } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
+ meter = m;
+ }
+ }
+
+ /* We now have:
+
+ meter -> the Meter for "pos"
+ tempo -> the Tempo for "pos"
+ i -> for first new metric after "pos", possibly metrics->end()
+ */
+
+ /* now comes the complicated part. we have to add one beat a time,
+ checking for a new metric on every beat.
+ */
+
+ frames_per_beat = tempo->frames_per_beat (_frame_rate, *meter);
+
+ while (ddist > 0) {
+
+ /* if we're nearly at the end, but have a fractional beat left,
+ compute the fraction and then its all over
+ */
+
+ if (ddist < frames_per_beat) {
+ beats += ddist / frames_per_beat;
+ break;
+ }
+
+ /* walk one beat */
+
+ ddist -= frames_per_beat;
+ dpos += frames_per_beat;
+ beats += 1.0;
+
+ /* check if we need to use a new metric section: has adding frames moved us
+ to or after the start of the next metric section? in which case, use it.
+ */
+
+ if (i != metrics->end()) {
+ if ((*i)->frame() <= (framepos_t) dpos) {
+
+ if ((t = dynamic_cast<const TempoSection*>(*i)) != 0) {
+ tempo = t;
+ } else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
+ meter = m;
+ }
+ ++i;
+ frames_per_beat = tempo->frames_per_beat (_frame_rate, *meter);
+ }
+ }
+
+ }
+
+ return beats;
+}
+
+
+/** Compare the time of this with that of another MetricSection.
+ * @param with_bbt True to compare using ::start(), false to use ::frame().
+ * @return -1 for less than, 0 for equal, 1 for greater than.
+ */
+
+int
+MetricSection::compare (MetricSection* other, bool with_bbt) const
+{
+ if (with_bbt) {
+ if (start() == other->start()) {
+ return 0;
+ } else if (start() < other->start()) {
+ return -1;
+ } else {
+ return 1;
+ }
+ } else {
+ if (frame() == other->frame()) {
+ return 0;
+ } else if (frame() < other->frame()) {
+ return -1;
+ } else {
+ return 1;
+ }
+ }
+
+ /* NOTREACHED */
+ return 0;
+}
projects / ardour.git / blobdiff