/* _default tempo is 4/4 qtr=120 */
Meter TempoMap::_default_meter (4.0, 4.0);
-Tempo TempoMap::_default_tempo (120.0);
+Tempo TempoMap::_default_tempo (120.0, 4.0);
+
+framepos_t
+MetricSection::frame_at_minute (const double& time) const
+{
+ return (framepos_t) floor ((time * 60.0 * _sample_rate) + 0.5);
+}
+
+double
+MetricSection::minute_at_frame (const framepos_t& frame) const
+{
+ return (frame / (double) _sample_rate) / 60.0;
+}
/***********************************************************************/
The return value IS NOT interpretable in terms of "beats".
*/
- return (60.0 * sr) / (tempo.beats_per_minute() * (_note_type/tempo.note_type()));
+ return (60.0 * sr) / (tempo.note_types_per_minute() * (_note_type/tempo.note_type()));
}
double
const string TempoSection::xml_state_node_name = "Tempo";
-TempoSection::TempoSection (const XMLNode& node)
- : MetricSection (0.0, 0, MusicTime, true)
+TempoSection::TempoSection (const XMLNode& node, framecnt_t sample_rate)
+ : MetricSection (0.0, 0, MusicTime, true, sample_rate)
, Tempo (TempoMap::default_tempo())
, _c_func (0.0)
, _active (true)
if ((prop = node.property ("frame")) != 0) {
if (sscanf (prop->value().c_str(), "%" PRIu32, &frame) != 1) {
error << _("TempoSection XML node has an illegal \"frame\" value") << endmsg;
+ throw failed_constructor();
} else {
- set_frame (frame);
+ set_minute (minute_at_frame (frame));
}
}
- if ((prop = node.property ("beats-per-minute")) == 0) {
- error << _("TempoSection XML node has no \"beats-per-minute\" property") << endmsg;
- throw failed_constructor();
- }
-
- if (sscanf (prop->value().c_str(), "%lf", &_beats_per_minute) != 1 || _beats_per_minute < 0.0) {
- error << _("TempoSection XML node has an illegal \"beats_per_minute\" value") << endmsg;
- throw failed_constructor();
+ /* XX replace old beats-per-minute name with note-types-per-minute */
+ if ((prop = node.property ("beats-per-minute")) != 0) {
+ if (sscanf (prop->value().c_str(), "%lf", &_note_types_per_minute) != 1 || _note_types_per_minute < 0.0) {
+ error << _("TempoSection XML node has an illegal \"beats-per-minutee\" value") << endmsg;
+ throw failed_constructor();
+ }
}
if ((prop = node.property ("note-type")) == 0) {
if (sscanf (prop->value().c_str(), "%lf", &_note_type) != 1 || _note_type < 1.0) {
error << _("TempoSection XML node has an illegal \"note-type\" value") << endmsg;
throw failed_constructor();
- }
+ }
}
if ((prop = node.property ("movable")) == 0) {
root->add_property ("pulse", buf);
snprintf (buf, sizeof (buf), "%li", frame());
root->add_property ("frame", buf);
- snprintf (buf, sizeof (buf), "%lf", _beats_per_minute);
+ snprintf (buf, sizeof (buf), "%lf", _note_types_per_minute);
root->add_property ("beats-per-minute", buf);
snprintf (buf, sizeof (buf), "%lf", _note_type);
root->add_property ("note-type", buf);
_type = type;
}
-/** returns the tempo in whole pulses per minute at the zero-based (relative to session) frame.
+/** returns the Tempo at the session-relative minute.
*/
-double
-TempoSection::tempo_at_frame (const framepos_t& f, const framecnt_t& frame_rate) const
+Tempo
+TempoSection::tempo_at_minute (const double& m) const
{
if (_type == Constant || _c_func == 0.0) {
- return pulses_per_minute();
+ return Tempo (note_types_per_minute(), note_type());
}
- return pulse_tempo_at_time (frame_to_minute (f - frame(), frame_rate));
+ return Tempo (_tempo_at_time (m - minute()), _note_type);
}
-/** returns the zero-based frame (relative to session)
- where the tempo in whole pulses per minute occurs in this section.
- pulse p is only used for constant tempos.
- note that the tempo map may have multiple such values.
+/** returns the session relative minute where the supplied tempo in note types per minute occurs.
+ * @param ntpm the tempo in mote types per minute used to calculate the returned minute
+ * @param p the pulse used to calculate the returned minute for constant tempi
+ * @return the minute at the supplied tempo
+ *
+ * note that the note_type is currently ignored in this function. see below.
+ *
*/
-framepos_t
-TempoSection::frame_at_tempo (const double& ppm, const double& p, const framecnt_t& frame_rate) const
+
+/** if tempoA (120, 4.0) precedes tempoB (120, 8.0),
+ * there should be no ramp between the two even if we are ramped.
+ * in other words a ramp should only place a curve on note_types_per_minute.
+ * we should be able to use Tempo note type here, but the above
+ * complicates things a bit.
+*/
+double
+TempoSection::minute_at_ntpm (const double& ntpm, const double& p) const
{
if (_type == Constant || _c_func == 0.0) {
- return ((p - pulse()) * frames_per_pulse (frame_rate)) + frame();
+ return ((p - pulse()) / pulses_per_minute()) + minute();
}
- return minute_to_frame (time_at_pulse_tempo (ppm), frame_rate) + frame();
+ return _time_at_tempo (ntpm) + minute();
}
-/** returns the tempo in pulses per minute at the zero-based (relative to session) beat.
-*/
-double
+
+/** returns the Tempo at the supplied whole-note pulse.
+ */
+Tempo
TempoSection::tempo_at_pulse (const double& p) const
{
if (_type == Constant || _c_func == 0.0) {
- return pulses_per_minute();
+ return Tempo (note_types_per_minute(), note_type());
+ }
+
+ return Tempo (_tempo_at_pulse (p - pulse()), _note_type);
+}
+
+/** returns the whole-note pulse where a tempo in note types per minute occurs.
+ * constant tempi require minute m.
+ * @param ntpm the note types per minute value used to calculate the returned pulse
+ * @param m the minute used to calculate the returned pulse if the tempo is constant
+ * @return the whole-note pulse at the supplied tempo
+ *
+ * note that note_type is currently ignored in this function. see minute_at_tempo().
+ *
+ * for constant tempi, this is anaologous to pulse_at_minute().
+*/
+double
+TempoSection::pulse_at_ntpm (const double& ntpm, const double& m) const
+{
+ if (_type == Constant || _c_func == 0.0) {
+ return ((m - minute()) * pulses_per_minute()) + pulse();
}
- double const ppm = pulse_tempo_at_pulse (p - pulse());
- return ppm;
+
+ return _pulse_at_tempo (ntpm) + pulse();
}
-/** returns the zero-based beat (relative to session)
- where the tempo in whole pulses per minute occurs given frame f. frame f is only used for constant tempos.
- note that the session tempo map may have multiple beats at a given tempo.
+/** returns the whole-note pulse at the supplied session-relative minute.
*/
double
-TempoSection::pulse_at_tempo (const double& ppm, const framepos_t& f, const framecnt_t& frame_rate) const
+TempoSection::pulse_at_minute (const double& m) const
{
if (_type == Constant || _c_func == 0.0) {
- double const pulses = ((f - frame()) / frames_per_pulse (frame_rate)) + pulse();
- return pulses;
+ return ((m - minute()) * pulses_per_minute()) + pulse();
}
- return pulse_at_pulse_tempo (ppm) + pulse();
+
+ return _pulse_at_time (m - minute()) + pulse();
}
-/** returns the zero-based pulse (relative to session origin)
- where the zero-based frame (relative to session)
- lies.
+/** returns the session-relative minute at the supplied whole-note pulse.
*/
double
-TempoSection::pulse_at_frame (const framepos_t& f, const framecnt_t& frame_rate) const
+TempoSection::minute_at_pulse (const double& p) const
{
if (_type == Constant || _c_func == 0.0) {
- return ((f - frame()) / frames_per_pulse (frame_rate)) + pulse();
+ return ((p - pulse()) / pulses_per_minute()) + minute();
}
- return pulse_at_time (frame_to_minute (f - frame(), frame_rate)) + pulse();
+ return _time_at_pulse (p - pulse()) + minute();
}
-/** returns the zero-based frame (relative to session start frame)
- where the zero-based pulse (relative to session start)
- falls.
+/** returns thw whole-note pulse at session frame position f.
+ * @param f the frame position.
+ * @return the position in whole-note pulses corresponding to f
+ *
+ * for use with musical units whose granularity is coarser than frames (e.g. ticks)
*/
+double
+TempoSection::pulse_at_frame (const framepos_t& f) const
+{
+ if (_type == Constant || _c_func == 0.0) {
+ return (minute_at_frame (f - frame()) * pulses_per_minute()) + pulse();
+ }
+
+ return _pulse_at_time (minute_at_frame (f - frame())) + pulse();
+}
framepos_t
-TempoSection::frame_at_pulse (const double& p, const framecnt_t& frame_rate) const
+TempoSection::frame_at_pulse (const double& p) const
{
if (_type == Constant || _c_func == 0.0) {
- return (framepos_t) floor ((p - pulse()) * frames_per_pulse (frame_rate)) + frame();
+ return frame_at_minute (((p - pulse()) / pulses_per_minute()) + minute());
}
- return minute_to_frame (time_at_pulse (p - pulse()), frame_rate) + frame();
+ return frame_at_minute (_time_at_pulse (p - pulse()) + minute());
}
/*
*/
-/*
- compute this ramp's function constant using the end tempo (in whole pulses per minute)
- and duration (pulses into global start) of some later tempo section.
+/** compute this ramp's function constant from some tempo-pulse point
+ * @param end_npm end tempo (in note types per minute)
+ * @param end_pulse duration (pulses into global start) of some other position.
+ * @return the calculated function constant
*/
double
-TempoSection::compute_c_func_pulse (const double& end_bpm, const double& end_pulse, const framecnt_t& frame_rate)
-{
- double const log_tempo_ratio = log (end_bpm / pulses_per_minute());
- return pulses_per_minute() * (expm1 (log_tempo_ratio)) / (end_pulse - pulse());
-}
-
-/* compute the function constant from some later tempo section, given tempo (whole pulses/min.) and distance (in frames) from session origin */
-double
-TempoSection::compute_c_func_frame (const double& end_bpm, const framepos_t& end_frame, const framecnt_t& frame_rate) const
+TempoSection::compute_c_func_pulse (const double& end_npm, const double& end_pulse) const
{
- return c_func (end_bpm, frame_to_minute (end_frame - frame(), frame_rate));
-}
-
-framepos_t
-TempoSection::minute_to_frame (const double& time, const framecnt_t& frame_rate) const
-{
- return (framepos_t) floor ((time * 60.0 * frame_rate) + 0.5);
+ double const log_tempo_ratio = log (end_npm / note_types_per_minute());
+ return (note_types_per_minute() * expm1 (log_tempo_ratio)) / ((end_pulse - pulse()) * _note_type);
}
+/** compute the function constant from some tempo-time point.
+ * @param end_npm tempo (note types/min.)
+ * @param end_minute distance (in minutes) from session origin
+ * @return the calculated function constant
+*/
double
-TempoSection::frame_to_minute (const framepos_t& frame, const framecnt_t& frame_rate) const
+TempoSection::compute_c_func_minute (const double& end_npm, const double& end_minute) const
{
- return (frame / (double) frame_rate) / 60.0;
+ return c_func (end_npm, end_minute - minute());
}
/* position function */
double
-TempoSection::a_func (double end_ppm, double c_func) const
+TempoSection::a_func (double end_npm, double c_func) const
{
- return log (end_ppm / pulses_per_minute()) / c_func;
+ return log (end_npm / note_types_per_minute()) / c_func;
}
/*function constant*/
double
-TempoSection::c_func (double end_ppm, double end_time) const
+TempoSection::c_func (double end_npm, double end_time) const
{
- return log (end_ppm / pulses_per_minute()) / end_time;
+ return log (end_npm / note_types_per_minute()) / end_time;
}
-/* tempo in ppm at time in minutes */
+/* tempo in note types per minute at time in minutes */
double
-TempoSection::pulse_tempo_at_time (const double& time) const
+TempoSection::_tempo_at_time (const double& time) const
{
- return exp (_c_func * time) * pulses_per_minute();
+ return exp (_c_func * time) * note_types_per_minute();
}
-/* time in minutes at tempo in ppm */
+/* time in minutes at tempo in note types per minute */
double
-TempoSection::time_at_pulse_tempo (const double& pulse_tempo) const
+TempoSection::_time_at_tempo (const double& npm) const
{
- return log (pulse_tempo / pulses_per_minute()) / _c_func;
+ return log (npm / note_types_per_minute()) / _c_func;
}
-/* tick at tempo in ppm */
+/* pulse at tempo in note types per minute */
double
-TempoSection::pulse_at_pulse_tempo (const double& pulse_tempo) const
+TempoSection::_pulse_at_tempo (const double& npm) const
{
- return (pulse_tempo - pulses_per_minute()) / _c_func;
+ return ((npm - note_types_per_minute()) / _c_func) / _note_type;
}
-/* tempo in ppm at tick */
+/* tempo in note types per minute at pulse */
double
-TempoSection::pulse_tempo_at_pulse (const double& pulse) const
+TempoSection::_tempo_at_pulse (const double& pulse) const
{
- return (pulse * _c_func) + pulses_per_minute();
+ return (pulse * _note_type * _c_func) + note_types_per_minute();
}
/* pulse at time in minutes */
double
-TempoSection::pulse_at_time (const double& time) const
+TempoSection::_pulse_at_time (const double& time) const
{
- return expm1 (_c_func * time) * (pulses_per_minute() / _c_func);
+ return (expm1 (_c_func * time) * (note_types_per_minute() / _c_func)) / _note_type;
}
/* time in minutes at pulse */
double
-TempoSection::time_at_pulse (const double& pulse) const
+TempoSection::_time_at_pulse (const double& pulse) const
{
- return log1p ((_c_func * pulse) / pulses_per_minute()) / _c_func;
+ return log1p ((_c_func * pulse * _note_type) / note_types_per_minute()) / _c_func;
}
/***********************************************************************/
const string MeterSection::xml_state_node_name = "Meter";
-MeterSection::MeterSection (const XMLNode& node)
- : MetricSection (0.0, 0, MusicTime, false), Meter (TempoMap::default_meter())
+MeterSection::MeterSection (const XMLNode& node, const framecnt_t sample_rate)
+ : MetricSection (0.0, 0, MusicTime, false, sample_rate), Meter (TempoMap::default_meter())
{
XMLProperty const * prop;
LocaleGuard lg;
if ((prop = node.property ("frame")) != 0) {
if (sscanf (prop->value().c_str(), "%li", &frame) != 1) {
error << _("MeterSection XML node has an illegal \"frame\" value") << endmsg;
+ throw failed_constructor();
} else {
- set_frame (frame);
+ set_minute (minute_at_frame (frame));
}
}
/*
Tempo Map Overview
- The Shaggs - Things I Wonder
- https://www.youtube.com/watch?v=9wQK6zMJOoQ
-
- Tempo is the rate of the musical pulse.
- Meters divide the pulses into measures and beats.
-
- TempoSections - provide pulses in the form of beats_per_minute() and note_type() where note_type is the division of a whole pulse,
- and beats_per_minute is the number of note_types in one minute (unlike what its name suggests).
- Note that Tempo::beats_per_minute() has nothing to do with musical beats. It has been left that way because
- a shorter one hasn't been found yet (pulse_divisions_per_minute()?).
+ Tempo determines the rate of musical pulse determined by its components
+ note types per minute - the rate per minute of the whole note divisor _note_type
+ note type - the division of whole notes (pulses) which occur at the rate of note types per minute.
+ Meter divides the musical pulse into measures and beats according to its components
+ divisions_per_bar
+ note_divisor
- MeterSecions - divide pulses into measures (via divisions_per_bar) and beats (via note_divisor).
+ TempoSection - translates between time, musical pulse and tempo.
+ has a musical location in whole notes (pulses).
+ has a time location in minutes.
+ Note that 'beats' in Tempo::note_types_per_minute() are in fact note types per minute.
+ (In the rest of tempo map,'beat' usually refers to accumulated BBT beats (pulse and meter based).
- Both tempos and meters have a pulse position and a frame position.
- Meters also have a beat position, which is always 0.0 for the first meter.
- TempoSections and MeterSections may be locked to either audio or music (position lock style).
- The lock style determines the 'true' position of the section wich is used to calculate the other postion parameters of the section.
+ MeterSection - translates between BBT, meter-based beat and musical pulse.
+ has a musical location in whole notes (pulses)
+ has a musical location in meter-based beats
+ has a musical location in BBT time
+ has a time location expressed in minutes.
- The first tempo and first meter are special. they must move together, and must be locked to audio.
- Audio locked tempos which lie before the first meter are made inactive.
- They will be re-activated if the first meter is again placed before them.
+ TempoSection and MeterSection may be locked to either audio or music (position lock style).
+ The lock style determines the location type to be kept as a reference when location is recalculated.
- With tepo sections potentially being ramped, meters provide a way of mapping beats to whole pulses without
- referring to the tempo function(s) involved as the distance in whole pulses between a meter and a subsequent beat is
- sb->beat() - meter->beat() / meter->note_divisor().
- Because every meter falls on a known pulse, (derived from its bar), the rest is easy as the duration in pulses between
- two meters is of course
- (meater_b->bar - meter_a->bar) * meter_a->divisions_per_bar / meter_a->note_divisor.
+ The first tempo and meter are special. they must move together, and are locked to audio.
+ Audio locked tempi which lie before the first meter are made inactive.
- Below, beat calculations are based on meter sections and all pulse and tempo calculations are based on tempo sections.
- Beat to frame conversion of course requires the use of meter and tempo.
+ Recomputing the map is the process where the 'missing' location types are calculated.
+ We construct the tempo map by first using the locked location type of each section
+ to determine non-locked location types (pulse or minute position).
+ We then use this map to find the pulse or minute position of each meter (again depending on lock style).
- Remembering that ramped tempo sections interact, it is important to avoid referring to any other tempos when moving tempo sections,
- Here, beats (meters) are used to determine the new pulse (see predict_tempo_position())
-
- Recomputing the map is the process where the 'missing' position
- (tempo pulse or meter pulse & beat in the case of AudioTime, frame for MusicTime) is calculated.
- We construct the tempo map by first using the frame or pulse position (depending on position lock style) of each tempo.
- We then use this tempo map (really just the tempos) to find the pulse or frame position of each meter (again depending on lock style).
-
- Having done this, we can now find any musical duration by selecting the tempo and meter covering the position (or tempo) in question
- and querying its appropriate meter/tempo.
+ Having done this, we can now traverse the Metrics list by pulse or minute
+ to query its relevant meter/tempo.
It is important to keep the _metrics in an order that makes sense.
Because ramped MusicTime and AudioTime tempos can interact with each other,
Music and Audio
Music and audio-locked objects may seem interchangeable on the surface, but when translating
- between audio samples and beats, keep in mind that a sample is only a quantised approximation
+ between audio samples and beat, remember that a sample is only a quantised approximation
of the actual time (in minutes) of a beat.
Thus if a gui user points to the frame occupying the start of a music-locked object on 1|3|0, it does not
mean that this frame is the actual location in time of 1|3|0.
beat_at_frame (frame_at_beat (beat)) != beat due to the time quantization of frame_at_beat().
Doing the second one will result in a beat distance error of up to 0.5 audio samples.
- So instead work in pulses and/or beats and only use beat position to caclulate frame position (e.g. after tempo change).
- For audio-locked objects, use frame position to calculate beat position.
+ frames_between_quarter_notes () eliminats this effect when determining time duration
+ from Beats distance, or instead work in quarter-notes and/or beats and convert to frames last.
- The above pointless example would then do:
- beat_at_pulse (pulse_at_beat (beat)) to avoid rounding.
+ The above pointless example could instead do:
+ beat_at_quarter_note (quarter_note_at_beat (beat)) to avoid rounding.
+
+ The Shaggs - Things I Wonder
+ https://www.youtube.com/watch?v=9wQK6zMJOoQ
*/
struct MetricSectionSorter {
_frame_rate = fr;
BBT_Time start (1, 1, 0);
- TempoSection *t = new TempoSection (0.0, 0, _default_tempo.beats_per_minute(), _default_tempo.note_type(), TempoSection::Ramp, AudioTime);
- MeterSection *m = new MeterSection (0.0, 0, 0.0, start, _default_meter.divisions_per_bar(), _default_meter.note_divisor(), AudioTime);
+ TempoSection *t = new TempoSection (0.0, 0.0, _default_tempo.note_types_per_minute(), _default_tempo.note_type(), TempoSection::Ramp, AudioTime, fr);
+ MeterSection *m = new MeterSection (0.0, 0.0, 0.0, start, _default_meter.divisions_per_bar(), _default_meter.note_divisor(), AudioTime, fr);
t->set_movable (false);
m->set_movable (false);
_metrics.clear();
}
+framepos_t
+TempoMap::frame_at_minute (const double time) const
+{
+ return (framepos_t) floor ((time * 60.0 * _frame_rate) + 0.5);
+}
+
+double
+TempoMap::minute_at_frame (const framepos_t frame) const
+{
+ return (frame / (double) _frame_rate) / 60.0;
+}
+
void
TempoMap::remove_tempo (const TempoSection& tempo, bool complete_operation)
{
//dump (_metrics, std::cout);
}
}
-
+/* user supplies the exact pulse if pls == MusicTime */
TempoSection*
TempoMap::add_tempo (const Tempo& tempo, const double& pulse, const framepos_t& frame, ARDOUR::TempoSection::Type type, PositionLockStyle pls)
{
TempoSection* ts = 0;
{
Glib::Threads::RWLock::WriterLock lm (lock);
- ts = add_tempo_locked (tempo, pulse, frame, type, pls, true);
+ ts = add_tempo_locked (tempo, pulse, minute_at_frame (frame), type, pls, true);
}
TempoSection& first (first_tempo());
if (ts.frame() != first.frame()) {
remove_tempo_locked (ts);
- add_tempo_locked (tempo, pulse, frame, type, pls, true, locked_to_meter);
+ add_tempo_locked (tempo, pulse, minute_at_frame (frame), type, pls, true, locked_to_meter);
} else {
first.set_type (type);
first.set_pulse (0.0);
- first.set_frame (frame);
+ first.set_minute (minute_at_frame (frame));
first.set_position_lock_style (AudioTime);
{
/* cannot move the first tempo section */
}
TempoSection*
-TempoMap::add_tempo_locked (const Tempo& tempo, double pulse, framepos_t frame
+TempoMap::add_tempo_locked (const Tempo& tempo, double pulse, double minute
, TempoSection::Type type, PositionLockStyle pls, bool recompute, bool locked_to_meter)
{
- TempoSection* t = new TempoSection (pulse, frame, tempo.beats_per_minute(), tempo.note_type(), type, pls);
+ TempoSection* t = new TempoSection (pulse, minute, tempo.note_types_per_minute(), tempo.note_type(), type, pls, _frame_rate);
t->set_locked_to_meter (locked_to_meter);
bool solved = false;
if (recompute) {
if (pls == AudioTime) {
- solved = solve_map_frame (_metrics, t, t->frame());
+ solved = solve_map_minute (_metrics, t, t->minute());
} else {
solved = solve_map_pulse (_metrics, t, t->pulse());
}
}
MeterSection*
-TempoMap::add_meter (const Meter& meter, const double& beat, const Timecode::BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
+TempoMap::add_meter (const Meter& meter, const double& beat, const Timecode::BBT_Time& where, PositionLockStyle pls)
{
MeterSection* m = 0;
{
Glib::Threads::RWLock::WriterLock lm (lock);
- m = add_meter_locked (meter, beat, where, frame, pls, true);
+ m = add_meter_locked (meter, beat, where, pls, true);
}
}
void
-TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where, const framepos_t& frame, PositionLockStyle pls)
+TempoMap::replace_meter (const MeterSection& ms, const Meter& meter, const BBT_Time& where, PositionLockStyle pls)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
if (ms.movable()) {
remove_meter_locked (ms);
- add_meter_locked (meter, beat, where, frame, pls, true);
+ add_meter_locked (meter, beat, where, pls, true);
} else {
MeterSection& first (first_meter());
TempoSection& first_t (first_tempo());
*static_cast<Meter*>(&first) = meter;
first.set_position_lock_style (AudioTime);
first.set_pulse (0.0);
- first.set_frame (frame);
+ //first.set_minute (minute_at_frame (frame));
pair<double, BBT_Time> beat = make_pair (0.0, BBT_Time (1, 1, 0));
first.set_beat (beat);
- first_t.set_frame (first.frame());
+ first_t.set_minute (first.minute());
first_t.set_pulse (0.0);
first_t.set_position_lock_style (AudioTime);
recompute_map (_metrics);
}
MeterSection*
-TempoMap::add_meter_locked (const Meter& meter, double beat, const BBT_Time& where, framepos_t frame, PositionLockStyle pls, bool recompute)
+TempoMap::add_meter_locked (const Meter& meter, double beat, const BBT_Time& where, PositionLockStyle pls, bool recompute)
{
- const MeterSection& prev_m = meter_section_at_frame_locked (_metrics, frame - 1);
+ const MeterSection& prev_m = meter_section_at_minute_locked (_metrics, minute_at_beat_locked (_metrics, beat) - minute_at_frame (1));
const double pulse = ((where.bars - prev_m.bbt().bars) * (prev_m.divisions_per_bar() / prev_m.note_divisor())) + prev_m.pulse();
+ const double time_minutes = minute_at_pulse_locked (_metrics, pulse);
TempoSection* mlt = 0;
if (pls == AudioTime) {
/* add meter-locked tempo */
- mlt = add_tempo_locked (tempo_at_frame_locked (_metrics, frame), pulse, frame, TempoSection::Ramp, AudioTime, true, true);
+ mlt = add_tempo_locked (tempo_at_minute_locked (_metrics, time_minutes), pulse, time_minutes, TempoSection::Ramp, AudioTime, true, true);
if (!mlt) {
return 0;
}
- MeterSection* new_meter = new MeterSection (pulse, frame, beat, where, meter.divisions_per_bar(), meter.note_divisor(), pls);
+ MeterSection* new_meter = new MeterSection (pulse, time_minutes, beat, where, meter.divisions_per_bar(), meter.note_divisor(), pls, _frame_rate);
bool solved = false;
do_insert (new_meter);
if (recompute) {
if (pls == AudioTime) {
- solved = solve_map_frame (_metrics, new_meter, frame);
+ solved = solve_map_minute (_metrics, new_meter, time_minutes);
} else {
solved = solve_map_bbt (_metrics, new_meter, where);
/* required due to resetting the pulse of meter-locked tempi above.
}
void
-TempoMap::change_initial_tempo (double beats_per_minute, double note_type)
+TempoMap::change_initial_tempo (double note_types_per_minute, double note_type)
{
- Tempo newtempo (beats_per_minute, note_type);
+ Tempo newtempo (note_types_per_minute, note_type);
TempoSection* t;
for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
}
void
-TempoMap::change_existing_tempo_at (framepos_t where, double beats_per_minute, double note_type)
+TempoMap::change_existing_tempo_at (framepos_t where, double note_types_per_minute, double note_type)
{
- Tempo newtempo (beats_per_minute, note_type);
+ Tempo newtempo (note_types_per_minute, note_type);
TempoSection* prev;
TempoSection* first;
}
if (prev_t) {
if (t->position_lock_style() == AudioTime) {
- prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_minute (t->note_types_per_minute(), t->minute()));
if (!t->locked_to_meter()) {
- t->set_pulse (prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate));
+ t->set_pulse (prev_t->pulse_at_ntpm (t->note_types_per_minute(), t->minute()));
}
} else {
- prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
- t->set_frame (prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_pulse (t->note_types_per_minute(), t->pulse()));
+ t->set_minute (prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()));
}
}
prev_t = t;
}
}
+ assert (prev_t);
prev_t->set_c_func (0.0);
}
meter->set_beat (b_bbt);
meter->set_pulse (pulse);
- meter->set_frame (frame_at_pulse_locked (metrics, pulse));
+ meter->set_minute (minute_at_pulse_locked (metrics, pulse));
}
prev_m = meter;
{
/* CALLER MUST HOLD WRITE LOCK */
- if (end < 0) {
-
- /* we will actually stop once we hit
- the last metric.
- */
- end = max_framepos;
-
- }
-
DEBUG_TRACE (DEBUG::TempoMath, string_compose ("recomputing tempo map, zero to %1\n", end));
if (end == 0) {
return m;
}
-/** Returns the beat duration corresponding to the supplied frame, possibly returning a negative value.
+/** Returns the BBT (meter-based) beat corresponding to the supplied frame, possibly returning a negative value.
* @param frame The session frame position.
* @return The beat duration according to the tempo map at the supplied frame.
+ *
* If the supplied frame lies before the first meter, the returned beat duration will be negative.
* The returned beat is obtained using the first meter and the continuation of the tempo curve (backwards).
*
TempoMap::beat_at_frame (const framecnt_t& frame) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return beat_at_frame_locked (_metrics, frame);
+
+ return beat_at_minute_locked (_metrics, minute_at_frame (frame));
}
/* This function uses both tempo and meter.*/
double
-TempoMap::beat_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const
+TempoMap::beat_at_minute_locked (const Metrics& metrics, const double& minute) const
{
- const TempoSection& ts = tempo_section_at_frame_locked (metrics, frame);
+ const TempoSection& ts = tempo_section_at_minute_locked (metrics, minute);
MeterSection* prev_m = 0;
MeterSection* next_m = 0;
for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
if (!(*i)->is_tempo()) {
- if (prev_m && (*i)->frame() > frame) {
+ if (prev_m && (*i)->minute() > minute) {
next_m = static_cast<MeterSection*> (*i);
break;
}
}
}
- const double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
+ const double beat = prev_m->beat() + (ts.pulse_at_minute (minute) - prev_m->pulse()) * prev_m->note_divisor();
/* audio locked meters fake their beat */
if (next_m && next_m->beat() < beat) {
return beat;
}
+/** Returns the frame corresponding to the supplied BBT (meter-based) beat.
+ * @param beat The BBT (meter-based) beat.
+ * @return The frame duration according to the tempo map at the supplied BBT (meter-based) beat.
+ *
+ * This function uses both tempo and meter.
+ */
framepos_t
TempoMap::frame_at_beat (const double& beat) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return frame_at_beat_locked (_metrics, beat);
+
+ return frame_at_minute (minute_at_beat_locked (_metrics, beat));
}
/* meter & tempo section based */
-framepos_t
-TempoMap::frame_at_beat_locked (const Metrics& metrics, const double& beat) const
+double
+TempoMap::minute_at_beat_locked (const Metrics& metrics, const double& beat) const
{
MeterSection* prev_m = 0;
TempoSection* prev_t = 0;
prev_m = m;
}
}
+ assert (prev_m);
TempoSection* t;
}
}
+ assert (prev_t);
- return prev_t->frame_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse(), _frame_rate);
+ return prev_t->minute_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse());
}
+/** Returns a Tempo corresponding to the supplied frame position.
+ * @param frame The audio frame.
+ * @return a Tempo according to the tempo map at the supplied frame.
+ *
+ */
Tempo
TempoMap::tempo_at_frame (const framepos_t& frame) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return tempo_at_frame_locked (_metrics, frame);
+
+ return tempo_at_minute_locked (_metrics, minute_at_frame (frame));
}
Tempo
-TempoMap::tempo_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
+TempoMap::tempo_at_minute_locked (const Metrics& metrics, const double& minute) const
{
TempoSection* prev_t = 0;
TempoSection* t;
- for (Metrics::const_iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
+ for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
if ((*i)->is_tempo()) {
t = static_cast<TempoSection*> (*i);
if (!t->active()) {
continue;
}
- if ((prev_t) && t->frame() > frame) {
+ if ((prev_t) && t->minute() > minute) {
/* t is the section past frame */
- const double ret_bpm = prev_t->tempo_at_frame (frame, _frame_rate) * 4.0;
- const Tempo ret_tempo (ret_bpm, prev_t->note_type());
- return ret_tempo;
+ return prev_t->tempo_at_minute (minute);
}
prev_t = t;
}
}
- const double ret = prev_t->beats_per_minute();
- const Tempo ret_tempo (ret, prev_t->note_type ());
-
- return ret_tempo;
+ return Tempo (prev_t->note_types_per_minute(), prev_t->note_type());
}
/** returns the frame at which the supplied tempo occurs, or
TempoMap::frame_at_tempo (const Tempo& tempo) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return frame_at_tempo_locked (_metrics, tempo);
+
+ return frame_at_minute (minute_at_tempo_locked (_metrics, tempo));
}
+double
+TempoMap::minute_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const
+{
+ TempoSection* prev_t = 0;
+ const double tempo_bpm = tempo.note_types_per_minute();
-framepos_t
-TempoMap::frame_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const
+ Metrics::const_iterator i;
+
+ for (i = metrics.begin(); i != metrics.end(); ++i) {
+ TempoSection* t;
+ if ((*i)->is_tempo()) {
+ t = static_cast<TempoSection*> (*i);
+
+ if (!t->active()) {
+ continue;
+ }
+
+ const double t_bpm = t->note_types_per_minute();
+
+ if (t_bpm == tempo_bpm) {
+ return t->minute();
+ }
+
+ if (prev_t) {
+ const double prev_t_bpm = prev_t->note_types_per_minute();
+
+ if ((t_bpm > tempo_bpm && prev_t_bpm < tempo_bpm) || (t_bpm < tempo_bpm && prev_t_bpm > tempo_bpm)) {
+ return prev_t->minute_at_ntpm (prev_t->note_types_per_minute(), prev_t->pulse());
+ }
+ }
+ prev_t = t;
+ }
+ }
+
+ return prev_t->minute();
+}
+
+Tempo
+TempoMap::tempo_at_pulse_locked (const Metrics& metrics, const double& pulse) const
{
TempoSection* prev_t = 0;
- const double tempo_ppm = tempo.beats_per_minute() / 4.0;
+
+ TempoSection* t;
+
+ for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
+ if ((*i)->is_tempo()) {
+ t = static_cast<TempoSection*> (*i);
+ if (!t->active()) {
+ continue;
+ }
+ if ((prev_t) && t->pulse() > pulse) {
+ /* t is the section past frame */
+ return prev_t->tempo_at_pulse (pulse);
+ }
+ prev_t = t;
+ }
+ }
+
+ return Tempo (prev_t->note_types_per_minute(), prev_t->note_type());
+}
+
+double
+TempoMap::pulse_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const
+{
+ TempoSection* prev_t = 0;
+ const double tempo_bpm = tempo.note_types_per_minute();
Metrics::const_iterator i;
- for (i = _metrics.begin(); i != _metrics.end(); ++i) {
+ for (i = metrics.begin(); i != metrics.end(); ++i) {
TempoSection* t;
if ((*i)->is_tempo()) {
t = static_cast<TempoSection*> (*i);
continue;
}
- const double t_ppm = t->beats_per_minute() / 4.0;
+ const double t_bpm = t->note_types_per_minute();
- if (t_ppm == tempo_ppm) {
- return t->frame();
+ if (t_bpm == tempo_bpm) {
+ return t->pulse();
}
if (prev_t) {
- const double prev_t_ppm = prev_t->beats_per_minute() / 4.0;
+ const double prev_t_bpm = prev_t->note_types_per_minute();
- if ((t_ppm > tempo_ppm && prev_t_ppm < tempo_ppm) || (t_ppm < tempo_ppm && prev_t_ppm > tempo_ppm)) {
- return prev_t->frame_at_tempo (tempo_ppm, prev_t->pulse(), _frame_rate);
+ if ((t_bpm > tempo_bpm && prev_t_bpm < tempo_bpm) || (t_bpm < tempo_bpm && prev_t_bpm > tempo_bpm)) {
+ return prev_t->pulse_at_ntpm (prev_t->note_types_per_minute(), prev_t->minute());
}
}
prev_t = t;
}
}
- return prev_t->frame();
+ return prev_t->pulse();
}
-/** more precise than doing tempo_at_frame (frame_at_beat (b)),
- * as there is no intermediate frame rounding.
+/** Returns a Tempo corresponding to the supplied position in quarter-note beats.
+ * @param qn the position in quarter note beats.
+ * @return the Tempo at the supplied quarter-note.
*/
Tempo
-TempoMap::tempo_at_beat (const double& beat) const
+TempoMap::tempo_at_quarter_note (const double& qn) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- const MeterSection* prev_m = &meter_section_at_beat_locked (_metrics, beat);
- const TempoSection* prev_t = &tempo_section_at_beat_locked (_metrics, beat);
- const double note_type = prev_t->note_type();
- return Tempo (prev_t->tempo_at_pulse (((beat - prev_m->beat()) / prev_m->note_divisor()) + prev_m->pulse()) * 4.0, note_type);
+ return tempo_at_pulse_locked (_metrics, qn / 4.0);
}
+/** Returns the position in quarter-note beats corresponding to the supplied Tempo.
+ * @param tempo the tempo.
+ * @return the position in quarter-note beats where the map bpm
+ * is equal to that of the Tempo. currently ignores note_type.
+ */
double
-TempoMap::pulse_at_beat (const double& beat) const
+TempoMap::quarter_note_at_tempo (const Tempo& tempo) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return pulse_at_beat_locked (_metrics, beat);
+
+ return pulse_at_tempo_locked (_metrics, tempo) * 4.0;;
}
+/** Returns the whole-note pulse corresponding to the supplied BBT (meter-based) beat.
+ * @param metrics the list of metric sections used to calculate the pulse.
+ * @param beat The BBT (meter-based) beat.
+ * @return the whole-note pulse at the supplied BBT (meter-based) beat.
+ *
+ * a pulse or whole note is the base musical position of a MetricSection.
+ * it is equivalent to four quarter notes.
+ *
+ */
double
TempoMap::pulse_at_beat_locked (const Metrics& metrics, const double& beat) const
{
return prev_m->pulse() + ((beat - prev_m->beat()) / prev_m->note_divisor());
}
-double
-TempoMap::beat_at_pulse (const double& pulse) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
- return beat_at_pulse_locked (_metrics, pulse);
-}
-
+/** Returns the BBT (meter-based) beat corresponding to the supplied whole-note pulse .
+ * @param metrics the list of metric sections used to calculate the beat.
+ * @param pulse the whole-note pulse.
+ * @return the meter-based beat at the supplied whole-note pulse.
+ *
+ * a pulse or whole note is the base musical position of a MetricSection.
+ * it is equivalent to four quarter notes.
+ */
double
TempoMap::beat_at_pulse_locked (const Metrics& metrics, const double& pulse) const
{
if (!(*i)->is_tempo()) {
m = static_cast<MeterSection*> (*i);
if (prev_m && m->pulse() > pulse) {
- if (((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat() > m->beat()) {
- break;
- }
+ break;
}
prev_m = m;
}
}
+ assert (prev_m);
double const ret = ((pulse - prev_m->pulse()) * prev_m->note_divisor()) + prev_m->beat();
return ret;
}
-double
-TempoMap::pulse_at_frame (const framepos_t& frame) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
- return pulse_at_frame_locked (_metrics, frame);
-}
-
/* tempo section based */
double
-TempoMap::pulse_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
+TempoMap::pulse_at_minute_locked (const Metrics& metrics, const double& minute) const
{
/* HOLD (at least) THE READER LOCK */
TempoSection* prev_t = 0;
if (!t->active()) {
continue;
}
- if (prev_t && t->frame() > frame) {
+ if (prev_t && t->minute() > minute) {
/*the previous ts is the one containing the frame */
- const double ret = prev_t->pulse_at_frame (frame, _frame_rate);
+ const double ret = prev_t->pulse_at_minute (minute);
/* audio locked section in new meter*/
if (t->pulse() < ret) {
return t->pulse();
}
/* treated as constant for this ts */
- const double pulses_in_section = (frame - prev_t->frame()) / prev_t->frames_per_pulse (_frame_rate);
+ const double pulses_in_section = ((minute - prev_t->minute()) * prev_t->note_types_per_minute()) / prev_t->note_type();
return pulses_in_section + prev_t->pulse();
}
-framepos_t
-TempoMap::frame_at_pulse (const double& pulse) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
- return frame_at_pulse_locked (_metrics, pulse);
-}
-
/* tempo section based */
-framepos_t
-TempoMap::frame_at_pulse_locked (const Metrics& metrics, const double& pulse) const
+double
+TempoMap::minute_at_pulse_locked (const Metrics& metrics, const double& pulse) const
{
/* HOLD THE READER LOCK */
continue;
}
if (prev_t && t->pulse() > pulse) {
- return prev_t->frame_at_pulse (pulse, _frame_rate);
+ return prev_t->minute_at_pulse (pulse);
}
prev_t = t;
}
}
/* must be treated as constant, irrespective of _type */
- double const dtime = (pulse - prev_t->pulse()) * prev_t->frames_per_pulse (_frame_rate);
+ double const dtime = ((pulse - prev_t->pulse()) * prev_t->note_type()) / prev_t->note_types_per_minute();
- return (framecnt_t) floor (dtime) + prev_t->frame();
+ return dtime + prev_t->minute();
}
+/** Returns the BBT (meter-based) beat corresponding to the supplied BBT time.
+ * @param bbt The BBT time (meter-based).
+ * @return bbt The BBT beat (meter-based) at the supplied BBT time.
+ *
+ */
double
TempoMap::beat_at_bbt (const Timecode::BBT_Time& bbt)
{
return ret;
}
+/** Returns the BBT time corresponding to the supplied BBT (meter-based) beat.
+ * @param beat The BBT (meter-based) beat.
+ * @return The BBT time (meter-based) at the supplied meter-based beat.
+ *
+ */
Timecode::BBT_Time
-TempoMap::bbt_at_beat (const double& beats)
+TempoMap::bbt_at_beat (const double& beat)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return bbt_at_beat_locked (_metrics, beats);
+ return bbt_at_beat_locked (_metrics, beat);
}
Timecode::BBT_Time
prev_m = m;
}
}
+ assert (prev_m);
const double beats_in_ms = beats - prev_m->beat();
const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
return ret;
}
+/** Returns the quarter-note beat corresponding to the supplied BBT time (meter-based).
+ * @param bbt The BBT time (meter-based).
+ * @return the quarter note beat at the supplied BBT time
+ *
+ * quarter-notes ignore meter and are based on pulse (the musical unit of MetricSection).
+ *
+ * while the input uses meter, the output does not.
+ */
double
-TempoMap::pulse_at_bbt (const Timecode::BBT_Time& bbt)
+TempoMap::quarter_note_at_bbt (const Timecode::BBT_Time& bbt)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return pulse_at_bbt_locked (_metrics, bbt);
+ return pulse_at_bbt_locked (_metrics, bbt) * 4.0;
}
double
-TempoMap::pulse_at_bbt_rt (const Timecode::BBT_Time& bbt)
+TempoMap::quarter_note_at_bbt_rt (const Timecode::BBT_Time& bbt)
{
- Glib::Threads::RWLock::ReaderLock lm (lock);
+ Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
if (!lm.locked()) {
- throw std::logic_error ("TempoMap::pulse_at_bbt_rt() could not lock tempo map");
+ throw std::logic_error ("TempoMap::quarter_note_at_bbt_rt() could not lock tempo map");
}
- return pulse_at_bbt_locked (_metrics, bbt);
+ return pulse_at_bbt_locked (_metrics, bbt) * 4.0;
}
double
return ret;
}
+/** Returns the BBT time corresponding to the supplied quarter-note beat.
+ * @param qn the quarter-note beat.
+ * @return The BBT time (meter-based) at the supplied meter-based beat.
+ *
+ * quarter-notes ignore meter and are based on pulse (the musical unit of MetricSection).
+ *
+ */
Timecode::BBT_Time
-TempoMap::bbt_at_pulse (const double& pulse)
+TempoMap::bbt_at_quarter_note (const double& qn)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return bbt_at_pulse_locked (_metrics, pulse);
+ return bbt_at_pulse_locked (_metrics, qn / 4.0);
}
+/** Returns the BBT time (meter-based) corresponding to the supplied whole-note pulse position.
+ * @param metrics The list of metric sections used to determine the result.
+ * @param pulse The whole-note pulse.
+ * @return The BBT time at the supplied whole-note pulse.
+ *
+ * a pulse or whole note is the basic musical position of a MetricSection.
+ * it is equivalent to four quarter notes.
+ * while the output uses meter, the input does not.
+ */
Timecode::BBT_Time
TempoMap::bbt_at_pulse_locked (const Metrics& metrics, const double& pulse) const
{
}
}
+ assert (prev_m);
+
const double beats_in_ms = (pulse - prev_m->pulse()) * prev_m->note_divisor();
const uint32_t bars_in_ms = (uint32_t) floor (beats_in_ms / prev_m->divisions_per_bar());
const uint32_t total_bars = bars_in_ms + (prev_m->bbt().bars - 1);
return ret;
}
+/** Returns the BBT time corresponding to the supplied frame position.
+ * @param frame the position in audio samples.
+ * @return the BBT time at the frame position .
+ *
+ */
BBT_Time
TempoMap::bbt_at_frame (framepos_t frame)
{
bbt.bars = 1;
bbt.beats = 1;
bbt.ticks = 0;
- warning << string_compose (_("tempo map asked for BBT time at frame %1\n"), frame) << endmsg;
+ warning << string_compose (_("tempo map was asked for BBT time at frame %1\n"), frame) << endmsg;
return bbt;
}
Glib::Threads::RWLock::ReaderLock lm (lock);
- return bbt_at_frame_locked (_metrics, frame);
+ return bbt_at_minute_locked (_metrics, minute_at_frame (frame));
}
BBT_Time
throw std::logic_error ("TempoMap::bbt_at_frame_rt() could not lock tempo map");
}
- return bbt_at_frame_locked (_metrics, frame);
+ return bbt_at_minute_locked (_metrics, minute_at_frame (frame));
}
Timecode::BBT_Time
-TempoMap::bbt_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const
+TempoMap::bbt_at_minute_locked (const Metrics& metrics, const double& minute) const
{
- if (frame < 0) {
+ if (minute < 0) {
BBT_Time bbt;
bbt.bars = 1;
bbt.beats = 1;
return bbt;
}
- const TempoSection& ts = tempo_section_at_frame_locked (metrics, frame);
+ const TempoSection& ts = tempo_section_at_minute_locked (metrics, minute);
MeterSection* prev_m = 0;
MeterSection* next_m = 0;
for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
if (!(*i)->is_tempo()) {
m = static_cast<MeterSection*> (*i);
- if (prev_m && m->frame() > frame) {
+ if (prev_m && m->minute() > minute) {
next_m = m;
break;
}
}
}
- double beat = prev_m->beat() + (ts.pulse_at_frame (frame, _frame_rate) - prev_m->pulse()) * prev_m->note_divisor();
+ double beat = prev_m->beat() + (ts.pulse_at_minute (minute) - prev_m->pulse()) * prev_m->note_divisor();
/* handle frame before first meter */
- if (frame < prev_m->frame()) {
+ if (minute < prev_m->minute()) {
beat = 0.0;
}
/* audio locked meters fake their beat */
return ret;
}
+/** Returns the frame position corresponding to the supplied BBT time.
+ * @param bbt the position in BBT time.
+ * @return the frame position at bbt.
+ *
+ */
framepos_t
TempoMap::frame_at_bbt (const BBT_Time& bbt)
{
}
Glib::Threads::RWLock::ReaderLock lm (lock);
- return frame_at_bbt_locked (_metrics, bbt);
+ return frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
}
/* meter & tempo section based */
-framepos_t
-TempoMap::frame_at_bbt_locked (const Metrics& metrics, const BBT_Time& bbt) const
+double
+TempoMap::minute_at_bbt_locked (const Metrics& metrics, const BBT_Time& bbt) const
{
/* HOLD THE READER LOCK */
- const framepos_t ret = frame_at_beat_locked (metrics, beat_at_bbt_locked (metrics, bbt));
+ const double ret = minute_at_beat_locked (metrics, beat_at_bbt_locked (metrics, bbt));
return ret;
}
/**
- * Returns the distance from 0 in quarter pulses at the supplied frame.
+ * Returns the quarter-note beat position corresponding to the supplied frame.
*
- * Plugin APIs don't count ticks in the same way PROGRAM_NAME does.
- * We use ticks per beat whereas the rest of the world uses ticks per quarter note.
- * This is more or less the VST's ppqPos (a scalar you use to obtain tick position
- * in whatever ppqn you're using).
+ * @param frame the position in frames.
+ * @return The quarter-note position of the supplied frame. Ignores meter.
*
- * @param frame The distance in frames relative to session 0 whose quarter note distance you would like.
- * @return The quarter note (quarter pulse) distance from session 0 to the supplied frame. Ignores meter.
*/
-
double
-TempoMap::quarter_note_at_frame (const framepos_t frame)
+TempoMap::quarter_note_at_frame (const framepos_t frame) const
{
- Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
+ Glib::Threads::RWLock::ReaderLock lm (lock);
- const double ret = quarter_note_at_frame_locked (_metrics, frame);
+ const double ret = quarter_note_at_minute_locked (_metrics, minute_at_frame (frame));
return ret;
}
double
-TempoMap::quarter_note_at_frame_locked (const Metrics& metrics, const framepos_t frame) const
+TempoMap::quarter_note_at_minute_locked (const Metrics& metrics, const double minute) const
{
- const double ret = pulse_at_frame_locked (metrics, frame) * 4.0;
+ const double ret = pulse_at_minute_locked (metrics, minute) * 4.0;
return ret;
}
double
-TempoMap::quarter_note_at_frame_rt (const framepos_t frame)
+TempoMap::quarter_note_at_frame_rt (const framepos_t frame) const
{
Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
throw std::logic_error ("TempoMap::quarter_note_at_frame_rt() could not lock tempo map");
}
- const double ret = pulse_at_frame_locked (_metrics, frame) * 4.0;
+ const double ret = pulse_at_minute_locked (_metrics, minute_at_frame (frame)) * 4.0;
return ret;
}
+/**
+ * Returns the frame position corresponding to the supplied quarter-note beat.
+ *
+ * @param quarter_note the quarter-note position.
+ * @return the frame position of the supplied quarter-note. Ignores meter.
+ *
+ *
+*/
framepos_t
-TempoMap::frame_at_quarter_note (const double quarter_note)
+TempoMap::frame_at_quarter_note (const double quarter_note) const
{
- Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
+ Glib::Threads::RWLock::ReaderLock lm (lock);
- const framepos_t ret = frame_at_quarter_note_locked (_metrics, quarter_note);
+ const framepos_t ret = frame_at_minute (minute_at_quarter_note_locked (_metrics, quarter_note));
return ret;
}
-framepos_t
-TempoMap::frame_at_quarter_note_locked (const Metrics& metrics, const double quarter_note) const
+double
+TempoMap::minute_at_quarter_note_locked (const Metrics& metrics, const double quarter_note) const
{
- const framepos_t ret = frame_at_pulse_locked (metrics, quarter_note / 4.0);
+ const double ret = minute_at_pulse_locked (metrics, quarter_note / 4.0);
return ret;
}
+/** Returns the quarter-note beats corresponding to the supplied BBT (meter-based) beat.
+ * @param beat The BBT (meter-based) beat.
+ * @return The quarter-note position of the supplied BBT (meter-based) beat.
+ *
+ * a quarter-note may be compared with and assigned to Evoral::Beats.
+ *
+ */
double
TempoMap::quarter_note_at_beat (const double beat)
{
- Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
+ Glib::Threads::RWLock::ReaderLock lm (lock);
const double ret = quarter_note_at_beat_locked (_metrics, beat);
return ret;
}
+/** Returns the BBT (meter-based) beat position corresponding to the supplied quarter-note beats.
+ * @param quarter_note The position in quarter-note beats.
+ * @return the BBT (meter-based) beat position of the supplied quarter-note beats.
+ *
+ * a quarter-note is the musical unit of Evoral::Beats.
+ *
+ */
double
TempoMap::beat_at_quarter_note (const double quarter_note)
{
- Glib::Threads::RWLock::ReaderLock lm (lock, Glib::Threads::TRY_LOCK);
+ Glib::Threads::RWLock::ReaderLock lm (lock);
- const double ret = beat_at_pulse_locked (_metrics, quarter_note / 4.0);
+ const double ret = beat_at_quarter_note_locked (_metrics, quarter_note);
return ret;
}
+double
+TempoMap::beat_at_quarter_note_locked (const Metrics& metrics, const double quarter_note) const
+{
+
+ return beat_at_pulse_locked (metrics, quarter_note / 4.0);
+}
+
+/** Returns the duration in frames between two supplied quarter-note beat positions.
+ * @param start the first position in quarter-note beats.
+ * @param end the end position in quarter-note beats.
+ * @return the frame distance ober the quarter-note beats duration.
+ *
+ * use this rather than e.g.
+ * frame_at-quarter_note (end_beats) - frame_at_quarter_note (start_beats).
+ * frames_between_quarter_notes() doesn't round to audio frames as an intermediate step,
+ *
+ */
+framecnt_t
+TempoMap::frames_between_quarter_notes (const double start, const double end) const
+{
+ Glib::Threads::RWLock::ReaderLock lm (lock);
+
+ return frame_at_minute (minutes_between_quarter_notes_locked (_metrics, start, end));
+}
+
+double
+TempoMap::minutes_between_quarter_notes_locked (const Metrics& metrics, const double start, const double end) const
+{
+
+ return minute_at_pulse_locked (metrics, end / 4.0) - minute_at_pulse_locked (metrics, start / 4.0);
+}
+
+double
+TempoMap::quarter_notes_between_frames (const framecnt_t start, const framecnt_t end) const
+{
+ Glib::Threads::RWLock::ReaderLock lm (lock);
+
+ return quarter_notes_between_frames_locked (_metrics, start, end);
+}
+
+double
+TempoMap::quarter_notes_between_frames_locked (const Metrics& metrics, const framecnt_t start, const framecnt_t end) const
+{
+ const TempoSection* prev_t = 0;
+
+ for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
+ TempoSection* t;
+
+ if ((*i)->is_tempo()) {
+ t = static_cast<TempoSection*> (*i);
+ if (!t->active()) {
+ continue;
+ }
+ if (prev_t && t->frame() > start) {
+ break;
+ }
+ prev_t = t;
+ }
+ }
+ assert (prev_t);
+ const double start_qn = prev_t->pulse_at_frame (start);
+
+ for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
+ TempoSection* t;
+
+ if ((*i)->is_tempo()) {
+ t = static_cast<TempoSection*> (*i);
+ if (!t->active()) {
+ continue;
+ }
+ if (prev_t && t->frame() > end) {
+ break;
+ }
+ prev_t = t;
+ }
+ }
+ const double end_qn = prev_t->pulse_at_frame (end);
+
+ return (end_qn - start_qn) * 4.0;
+}
+
bool
TempoMap::check_solved (const Metrics& metrics) const
{
}
if (prev_t) {
/* check ordering */
- if ((t->frame() <= prev_t->frame()) || (t->pulse() <= prev_t->pulse())) {
+ if ((t->minute() <= prev_t->minute()) || (t->pulse() <= prev_t->pulse())) {
return false;
}
/* precision check ensures tempo and frames align.*/
- if (t->frame() != prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate)) {
+ if (t->frame() != frame_at_minute (prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()))) {
if (!t->locked_to_meter()) {
return false;
}
if (!(*i)->is_tempo()) {
m = static_cast<MeterSection*> (*i);
if (prev_m && m->position_lock_style() == AudioTime) {
- const TempoSection* t = &tempo_section_at_frame_locked (metrics, m->frame() - 1);
- const framepos_t nascent_m_frame = t->frame_at_pulse (m->pulse(), _frame_rate);
+ const TempoSection* t = &tempo_section_at_minute_locked (metrics, minute_at_frame (m->frame() - 1));
+ const double nascent_m_minute = t->minute_at_pulse (m->pulse());
/* Here we check that a preceding section of music doesn't overlap a subsequent one.
- It is complicated by the fact that audio locked meters represent a discontinuity in the pulse
- (they place an exact pulse at a particular time expressed only in frames).
- This has the effect of shifting the calculated frame at the meter pulse (wrt the previous section of music)
- away from its actual frame (which is now the frame location of the exact pulse).
- This can result in the calculated frame (from the previous musical section)
- differing from the exact frame by one sample.
- Allow for that.
*/
- if (t && (nascent_m_frame > m->frame() + 1 || nascent_m_frame < 0)) {
+ if (t && (nascent_m_minute > m->minute() || nascent_m_minute < 0.0)) {
return false;
}
}
}
bool
-TempoMap::solve_map_frame (Metrics& imaginary, TempoSection* section, const framepos_t& frame)
+TempoMap::solve_map_minute (Metrics& imaginary, TempoSection* section, const double& minute)
{
TempoSection* prev_t = 0;
TempoSection* section_prev = 0;
- framepos_t first_m_frame = 0;
+ double first_m_minute = 0.0;
/* can't move a tempo before the first meter */
for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
if (!(*i)->is_tempo()) {
m = static_cast<MeterSection*> (*i);
if (!m->movable()) {
- first_m_frame = m->frame();
+ first_m_minute = m->minute();
break;
}
}
}
- if (section->movable() && frame <= first_m_frame) {
+ if (section->movable() && minute <= first_m_minute) {
return false;
}
section->set_active (true);
- section->set_frame (frame);
+ section->set_minute (minute);
for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
TempoSection* t;
continue;
}
if (t->position_lock_style() == MusicTime) {
- prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
- t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_pulse (t->note_types_per_minute(), t->pulse()));
+ t->set_minute (prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()));
} else {
- prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_minute (t->note_types_per_minute(), t->minute()));
if (!t->locked_to_meter()) {
- t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
+ t->set_pulse (prev_t->pulse_at_ntpm (t->note_types_per_minute(), t->minute()));
}
}
}
}
if (section_prev) {
- section_prev->set_c_func (section_prev->compute_c_func_frame (section->pulses_per_minute(), frame, _frame_rate));
+ section_prev->set_c_func (section_prev->compute_c_func_minute (section->note_types_per_minute(), minute));
if (!section->locked_to_meter()) {
- section->set_pulse (section_prev->pulse_at_frame (frame, _frame_rate));
+ section->set_pulse (section_prev->pulse_at_ntpm (section->note_types_per_minute(), minute));
}
}
continue;
}
if (t->position_lock_style() == MusicTime) {
- prev_t->set_c_func (prev_t->compute_c_func_pulse (t->pulses_per_minute(), t->pulse(), _frame_rate));
- t->set_frame (prev_t->frame_at_pulse (t->pulse(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_pulse (t->note_types_per_minute(), t->pulse()));
+ t->set_minute (prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()));
} else {
- prev_t->set_c_func (prev_t->compute_c_func_frame (t->pulses_per_minute(), t->frame(), _frame_rate));
+ prev_t->set_c_func (prev_t->compute_c_func_minute (t->note_types_per_minute(), t->minute()));
if (!t->locked_to_meter()) {
- t->set_pulse (prev_t->pulse_at_frame (t->frame(), _frame_rate));
+ t->set_pulse (prev_t->pulse_at_ntpm (t->note_types_per_minute(), t->minute()));
}
}
}
}
if (section_prev) {
- section_prev->set_c_func (section_prev->compute_c_func_pulse (section->pulses_per_minute(), pulse, _frame_rate));
- section->set_frame (section_prev->frame_at_pulse (pulse, _frame_rate));
+ section_prev->set_c_func (section_prev->compute_c_func_pulse (section->note_types_per_minute(), pulse));
+ section->set_minute (section_prev->minute_at_ntpm (section->note_types_per_minute(), pulse));
}
#if (0)
}
bool
-TempoMap::solve_map_frame (Metrics& imaginary, MeterSection* section, const framepos_t& frame)
+TempoMap::solve_map_minute (Metrics& imaginary, MeterSection* section, const double& minute)
{
/* disallow moving first meter past any subsequent one, and any movable meter before the first one */
- const MeterSection* other = &meter_section_at_frame_locked (imaginary, frame);
- if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->frame() >= frame)) {
+ const MeterSection* other = &meter_section_at_minute_locked (imaginary, minute);
+ if ((!section->movable() && other->movable()) || (!other->movable() && section->movable() && other->minute() >= minute)) {
return false;
}
if (!section->movable()) {
/* lock the first tempo to our first meter */
- if (!set_active_tempos (imaginary, frame)) {
+ if (!set_active_tempos (imaginary, section->frame_at_minute (minute))) {
return false;
}
}
TempoSection* t;
if ((*ii)->is_tempo()) {
t = static_cast<TempoSection*> (*ii);
- if ((t->locked_to_meter() || !t->movable()) && t->frame() == section->frame()) {
+ if ((t->locked_to_meter() || !t->movable()) && t->minute() == section->minute()) {
meter_locked_tempo = t;
break;
}
m = static_cast<MeterSection*> (*i);
if (m == section){
if (prev_m && section->movable()) {
- const double beats = (pulse_at_frame_locked (imaginary, frame) - prev_m->pulse()) * prev_m->note_divisor();
+ const double beats = (pulse_at_minute_locked (imaginary, minute) - prev_m->pulse()) * prev_m->note_divisor();
if (beats + prev_m->beat() < section->beat()) {
- /* set the frame/pulse corresponding to its musical position,
+ /* set the section pulse according to its musical position,
* as an earlier time than this has been requested.
*/
const double new_pulse = ((section->beat() - prev_m->beat())
/ prev_m->note_divisor()) + prev_m->pulse();
- const framepos_t smallest_frame = frame_at_pulse_locked (future_map, new_pulse);
-
- if ((solved = solve_map_frame (future_map, tempo_copy, smallest_frame))) {
- meter_locked_tempo->set_pulse (new_pulse);
- solve_map_frame (imaginary, meter_locked_tempo, smallest_frame);
- section->set_frame (smallest_frame);
+ tempo_copy->set_position_lock_style (MusicTime);
+ if ((solved = solve_map_pulse (future_map, tempo_copy, new_pulse))) {
+ meter_locked_tempo->set_position_lock_style (MusicTime);
+ section->set_position_lock_style (MusicTime);
section->set_pulse (new_pulse);
+ solve_map_pulse (imaginary, meter_locked_tempo, new_pulse);
+ meter_locked_tempo->set_position_lock_style (AudioTime);
+ section->set_position_lock_style (AudioTime);
+ section->set_minute (meter_locked_tempo->minute());
+
} else {
solved = false;
}
possibly disallowed if there is an adjacent audio-locked tempo.
XX this check could possibly go. its never actually happened here.
*/
- MeterSection* meter_copy = const_cast<MeterSection*> (&meter_section_at_frame_locked (future_map, section->frame()));
- meter_copy->set_frame (frame);
+ MeterSection* meter_copy = const_cast<MeterSection*>
+ (&meter_section_at_minute_locked (future_map, section->minute()));
+
+ meter_copy->set_minute (minute);
- if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
- section->set_frame (frame);
+ if ((solved = solve_map_minute (future_map, tempo_copy, minute))) {
+ section->set_minute (minute);
meter_locked_tempo->set_pulse (((section->beat() - prev_m->beat())
/ prev_m->note_divisor()) + prev_m->pulse());
- solve_map_frame (imaginary, meter_locked_tempo, frame);
+ solve_map_minute (imaginary, meter_locked_tempo, minute);
} else {
solved = false;
}
} else {
/* not movable (first meter atm) */
- tempo_copy->set_frame (frame);
+ tempo_copy->set_minute (minute);
tempo_copy->set_pulse (0.0);
- if ((solved = solve_map_frame (future_map, tempo_copy, frame))) {
- section->set_frame (frame);
- meter_locked_tempo->set_frame (frame);
+ if ((solved = solve_map_minute (future_map, tempo_copy, minute))) {
+ section->set_minute (minute);
+ meter_locked_tempo->set_minute (minute);
meter_locked_tempo->set_pulse (0.0);
- solve_map_frame (imaginary, meter_locked_tempo, frame);
+ solve_map_minute (imaginary, meter_locked_tempo, minute);
} else {
solved = false;
}
section->set_beat (b_bbt);
section->set_pulse (pulse);
- section->set_frame (frame_at_pulse_locked (imaginary, pulse));
+ section->set_minute (minute_at_pulse_locked (imaginary, pulse));
prev_m = section;
continue;
}
new_pulse = (beats / prev_m->note_divisor()) + prev_m->pulse();
m->set_beat (b_bbt);
m->set_pulse (new_pulse);
- m->set_frame (frame_at_pulse_locked (imaginary, new_pulse));
+ m->set_minute (minute_at_pulse_locked (imaginary, new_pulse));
}
prev_m = m;
section->set_beat (b_bbt);
section->set_pulse (pulse);
- section->set_frame (frame_at_pulse_locked (imaginary, pulse));
+ section->set_minute (minute_at_pulse_locked (imaginary, pulse));
}
MetricSectionSorter cmp;
/** answers the question "is this a valid beat position for this tempo section?".
* it returns true if the tempo section can be moved to the requested bbt position,
* leaving the tempo map in a solved state.
- * @param section the tempo section to be moved
+ * @param ts the tempo section to be moved
* @param bbt the requested new position for the tempo section
* @return true if the tempo section can be moved to the position, otherwise false.
*/
* This is for a gui that needs to know the pulse or frame of a tempo section if it were to be moved to some bbt time,
* taking any possible reordering as a consequence of this into account.
* @param section - the section to be altered
-* @param bbt - the bbt where the altered tempo will fall
+* @param bbt - the BBT time where the altered tempo will fall
* @return returns - the position in pulses and frames (as a pair) where the new tempo section will lie.
*/
pair<double, framepos_t>
return ret;
}
+/** moves a TempoSection to a specified position.
+ * @param ts - the section to be moved
+ * @param frame - the new position in frames for the tempo
+ * @param sub_num - the snap division to use if using musical time.
+ *
+ * if sub_num is non-zero, the frame position is used to calculate an exact
+ * musical position.
+ * sub_num | effect
+ * -1 | snap to bars (meter-based)
+ * 0 | no snap - use audio frame for musical position
+ * 1 | snap to meter-based (BBT) beat
+ * >1 | snap to quarter-note subdivision (i.e. 4 will snap to sixteenth notes)
+ *
+ * this follows the snap convention in the gui.
+ * if sub_num is zero, the musical position will be taken from the supplied frame.
+ */
void
TempoMap::gui_move_tempo (TempoSection* ts, const framepos_t& frame, const int& sub_num)
{
tempo_copy->set_position_lock_style (AudioTime);
- if (solve_map_frame (future_map, tempo_copy, frame)) {
+ if (solve_map_minute (future_map, tempo_copy, minute_at_frame (frame))) {
const double beat = exact_beat_at_frame_locked (future_map, frame, sub_num);
const double pulse = pulse_at_beat_locked (future_map, beat);
Glib::Threads::RWLock::WriterLock lm (lock);
TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
- if (solve_map_frame (future_map, tempo_copy, frame)) {
+ if (solve_map_minute (future_map, tempo_copy, minute_at_frame (frame))) {
if (sub_num != 0) {
/* We're moving the object that defines the grid while snapping to it...
* Placing the ts at the beat corresponding to the requested frame may shift the
recompute_meters (_metrics);
}
} else {
- solve_map_frame (_metrics, ts, frame);
+ solve_map_minute (_metrics, ts, minute_at_frame (frame));
recompute_meters (_metrics);
}
}
MetricPositionChanged (); // Emit Signal
}
+/** moves a MeterSection to a specified position.
+ * @param ms - the section to be moved
+ * @param frame - the new position in frames for the meter
+ *
+ * as a meter cannot snap to anything but bars,
+ * the supplied frame is rounded to the nearest bar, possibly
+ * leaving the meter position unchanged.
+ */
void
TempoMap::gui_move_meter (MeterSection* ms, const framepos_t& frame)
{
Glib::Threads::RWLock::WriterLock lm (lock);
MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
- if (solve_map_frame (future_map, copy, frame)) {
- solve_map_frame (_metrics, ms, frame);
+ if (solve_map_minute (future_map, copy, minute_at_frame (frame))) {
+ solve_map_minute (_metrics, ms, minute_at_frame (frame));
recompute_tempi (_metrics);
}
}
Glib::Threads::RWLock::WriterLock lm (lock);
MeterSection* copy = copy_metrics_and_point (_metrics, future_map, ms);
- const double beat = beat_at_frame_locked (_metrics, frame);
+ const double beat = beat_at_minute_locked (_metrics, minute_at_frame (frame));
const Timecode::BBT_Time bbt = bbt_at_beat_locked (_metrics, beat);
if (solve_map_bbt (future_map, copy, bbt)) {
{
Glib::Threads::RWLock::WriterLock lm (lock);
TempoSection* tempo_copy = copy_metrics_and_point (_metrics, future_map, ts);
- tempo_copy->set_beats_per_minute (bpm.beats_per_minute());
+ tempo_copy->set_note_types_per_minute (bpm.note_types_per_minute());
recompute_tempi (future_map);
if (check_solved (future_map)) {
- ts->set_beats_per_minute (bpm.beats_per_minute());
+ ts->set_note_types_per_minute (bpm.note_types_per_minute());
recompute_map (_metrics);
can_solve = true;
}
}
void
-TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame, const double& pulse)
+TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame)
{
/*
Ts (future prev_t) Tnext
| |
| [drag^] |
|----------|----------
- e_f pulse(frame)
+ e_f qn_beats(frame)
*/
Metrics future_map;
TempoSection* prev_to_prev_t = 0;
const frameoffset_t fr_off = end_frame - frame;
- if (prev_t && prev_t->pulse() > 0.0) {
- prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_frame_locked (future_map, prev_t->frame() - 1));
+ assert (prev_t);
+
+ if (prev_t->pulse() > 0.0) {
+ prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_minute_locked (future_map, minute_at_frame (prev_t->frame() - 1)));
}
TempoSection* next_t = 0;
const frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
- const double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
- const double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
+ const double start_pulse = prev_t->pulse_at_minute (minute_at_frame (frame));
+ const double end_pulse = prev_t->pulse_at_minute (minute_at_frame (end_frame));
double new_bpm;
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
if (frame > prev_to_prev_t->frame() + min_dframe && (frame + prev_t_frame_contribution) > prev_to_prev_t->frame() + min_dframe) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
+ new_bpm = prev_t->note_types_per_minute() * ((frame - prev_to_prev_t->frame())
/ (double) ((frame + prev_t_frame_contribution) - prev_to_prev_t->frame()));
} else {
- new_bpm = prev_t->beats_per_minute();
+ new_bpm = prev_t->note_types_per_minute();
}
} else {
/* prev to prev is irrelevant */
if (start_pulse > prev_t->pulse() && end_pulse > prev_t->pulse()) {
- new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
+ new_bpm = prev_t->note_types_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
} else {
- new_bpm = prev_t->beats_per_minute();
+ new_bpm = prev_t->note_types_per_minute();
}
}
} else {
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
if (frame > prev_to_prev_t->frame() + min_dframe && end_frame > prev_to_prev_t->frame() + min_dframe) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
+ new_bpm = prev_t->note_types_per_minute() * ((frame - prev_to_prev_t->frame())
/ (double) ((end_frame) - prev_to_prev_t->frame()));
} else {
- new_bpm = prev_t->beats_per_minute();
+ new_bpm = prev_t->note_types_per_minute();
}
} else {
/* prev_to_prev_t is irrelevant */
if (frame > prev_t->frame() + min_dframe && end_frame > prev_t->frame() + min_dframe) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
+ new_bpm = prev_t->note_types_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
} else {
- new_bpm = prev_t->beats_per_minute();
+ new_bpm = prev_t->note_types_per_minute();
}
}
}
double frame_ratio = 1.0;
double pulse_ratio = 1.0;
- const framepos_t pulse_pos = prev_t->frame_at_pulse (pulse, _frame_rate);
+ const double pulse_pos = frame;
if (prev_to_prev_t) {
if (pulse_pos > prev_to_prev_t->frame() + min_dframe && (pulse_pos - fr_off) > prev_to_prev_t->frame() + min_dframe) {
}
pulse_ratio = (start_pulse / end_pulse);
}
- new_bpm = prev_t->beats_per_minute() * (pulse_ratio * frame_ratio);
+ new_bpm = prev_t->note_types_per_minute() * (pulse_ratio * frame_ratio);
}
/* don't clamp and proceed here.
return;
}
new_bpm = min (new_bpm, (double) 1000.0);
- prev_t->set_beats_per_minute (new_bpm);
+ prev_t->set_note_types_per_minute (new_bpm);
recompute_tempi (future_map);
recompute_meters (future_map);
if (check_solved (future_map)) {
- ts->set_beats_per_minute (new_bpm);
+ ts->set_note_types_per_minute (new_bpm);
recompute_tempi (_metrics);
recompute_meters (_metrics);
}
MetricPositionChanged (); // Emit Signal
}
-/** Returns the exact beat subdivision closest to the supplied frame, possibly returning a negative value.
+/** Returns the exact bbt-based beat corresponding to the bar, beat or quarter note subdivision nearest to
+ * the supplied frame, possibly returning a negative value.
+ *
* @param frame The session frame position.
- * @param sub_num The requested beat subdivision to use when rounding the frame position.
+ * @param sub_num The subdivision to use when rounding the beat.
+ * A value of -1 indicates rounding to BBT bar. 1 indicates rounding to BBT beats.
+ * Positive integers indicate quarter note (non BBT) divisions.
+ * 0 indicates that the returned beat should not be rounded (equivalent to quarter_note_at_frame()).
* @return The beat position of the supplied frame.
- * If the supplied frame lies before the first meter, the return will be negative.
- * The returned beat is obtained using the first meter and the continuation of the tempo curve (backwards).
*
- * This function uses both tempo and meter.
+ * when working to a musical grid, the use of sub_nom indicates that
+ * the position should be interpreted musically.
+ *
+ * it effectively snaps to meter bars, meter beats or quarter note divisions
+ * (as per current gui convention) and returns a musical position independent of frame rate.
+ *
+ * If the supplied frame lies before the first meter, the return will be negative,
+ * in which case the returned beat uses the first meter (for BBT subdivisions) and
+ * the continuation of the tempo curve (backwards).
+ *
+ * This function is sensitive to tempo and meter.
*/
double
TempoMap::exact_beat_at_frame (const framepos_t& frame, const int32_t sub_num)
}
double
-TempoMap::exact_beat_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t sub_num)
+TempoMap::exact_beat_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t divisions)
{
- double beat = beat_at_frame_locked (metrics, frame);
-
- if (sub_num > 1) {
- beat = floor (beat) + (floor (((beat - floor (beat)) * (double) sub_num) + 0.5) / sub_num);
- } else if (sub_num == 1) {
- /* snap to beat */
- beat = floor (beat + 0.5);
- } else if (sub_num == -1) {
- /* snap to bar */
- Timecode::BBT_Time bbt = bbt_at_beat_locked (metrics, beat);
- bbt.beats = 1;
- bbt.ticks = 0;
-
- const double prev_b = beat_at_bbt_locked (_metrics, bbt);
- ++bbt.bars;
- const double next_b = beat_at_bbt_locked (_metrics, bbt);
-
- if ((beat - prev_b) > (next_b - prev_b) / 2.0) {
- beat = next_b;
- } else {
- beat = prev_b;
- }
- }
-
- return beat;
+ return beat_at_pulse_locked (_metrics, exact_qn_at_frame_locked (metrics, frame, divisions) / 4.0);
}
+
+/** Returns the exact quarter note corresponding to the bar, beat or quarter note subdivision nearest to
+ * the supplied frame, possibly returning a negative value.
+ *
+ * @param frame The session frame position.
+ * @param sub_num The subdivision to use when rounding the quarter note.
+ * A value of -1 indicates rounding to BBT bar. 1 indicates rounding to BBT beats.
+ * Positive integers indicate quarter note (non BBT) divisions.
+ * 0 indicates that the returned quarter note should not be rounded (equivalent to quarter_note_at_frame()).
+ * @return The quarter note position of the supplied frame.
+ *
+ * When working to a musical grid, the use of sub_nom indicates that
+ * the frame position should be interpreted musically.
+ *
+ * it effectively snaps to meter bars, meter beats or quarter note divisions
+ * (as per current gui convention) and returns a musical position independent of frame rate.
+ *
+ * If the supplied frame lies before the first meter, the return will be negative,
+ * in which case the returned quarter note uses the first meter (for BBT subdivisions) and
+ * the continuation of the tempo curve (backwards).
+ *
+ * This function is tempo-sensitive.
+ */
double
TempoMap::exact_qn_at_frame (const framepos_t& frame, const int32_t sub_num)
{
double
TempoMap::exact_qn_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t sub_num)
{
- double qn = quarter_note_at_frame_locked (metrics, frame);
+ double qn = quarter_note_at_minute_locked (metrics, minute_at_frame (frame));
if (sub_num > 1) {
qn = floor (qn) + (floor (((qn - floor (qn)) * (double) sub_num) + 0.5) / sub_num);
} else if (sub_num == 1) {
- /* snap to quarter note */
- qn = floor (qn + 0.5);
+ /* the gui requested exact musical (BBT) beat */
+ qn = quarter_note_at_beat_locked (metrics, floor (beat_at_minute_locked (metrics, minute_at_frame (frame)) + 0.5));
} else if (sub_num == -1) {
/* snap to bar */
Timecode::BBT_Time bbt = bbt_at_pulse_locked (metrics, qn / 4.0);
bbt.beats = 1;
bbt.ticks = 0;
- const double prev_b = pulse_at_bbt_locked (_metrics, bbt) * 4.0;
+ const double prev_b = pulse_at_bbt_locked (metrics, bbt) * 4.0;
++bbt.bars;
- const double next_b = pulse_at_bbt_locked (_metrics, bbt) * 4.0;
+ const double next_b = pulse_at_bbt_locked (metrics, bbt) * 4.0;
if ((qn - prev_b) > (next_b - prev_b) / 2.0) {
qn = next_b;
return qn;
}
+/** returns the frame duration of the supplied BBT time at a specified frame position in the tempo map.
+ * @param pos the frame position in the tempo map.
+ * @param bbt the distance in BBT time from pos to calculate.
+ * @param dir the rounding direction..
+ * @return the duration in frames between pos and bbt
+*/
framecnt_t
TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- const double tick_at_time = max (0.0, beat_at_frame_locked (_metrics, pos)) * BBT_Time::ticks_per_beat;
- const double bbt_ticks = bbt.ticks + (bbt.beats * BBT_Time::ticks_per_beat);
- const double total_beats = (tick_at_time + bbt_ticks) / BBT_Time::ticks_per_beat;
+ BBT_Time pos_bbt = bbt_at_minute_locked (_metrics, minute_at_frame (pos));
+ const framecnt_t offset = frame_at_minute (minute_at_bbt_locked (_metrics, pos_bbt));
+ const double divisions = meter_section_at_minute_locked (_metrics, minute_at_frame (pos)).divisions_per_bar();
+
+ if (dir > 0) {
+ pos_bbt.bars += bbt.bars;
+
+ pos_bbt.ticks += bbt.ticks;
+ if ((double) pos_bbt.ticks > BBT_Time::ticks_per_beat) {
+ pos_bbt.beats += 1;
+ pos_bbt.ticks -= BBT_Time::ticks_per_beat;
+ }
+
+ pos_bbt.beats += bbt.beats;
+ if ((double) pos_bbt.beats > divisions) {
+ pos_bbt.bars += 1;
+ pos_bbt.beats -= divisions;
+ }
+
+ return frame_at_minute (minute_at_bbt_locked (_metrics, pos_bbt)) - offset;
+ } else {
+ pos_bbt.bars -= bbt.bars;
+
+ if (pos_bbt.ticks < bbt.ticks) {
+ if (pos_bbt.beats == 1) {
+ pos_bbt.bars--;
+ pos_bbt.beats = divisions;
+ } else {
+ pos_bbt.beats--;
+ }
+ pos_bbt.ticks = BBT_Time::ticks_per_beat - (bbt.ticks - pos_bbt.ticks);
+ } else {
+ pos_bbt.ticks -= bbt.ticks;
+ }
- return frame_at_beat_locked (_metrics, total_beats);
+ if (pos_bbt.beats <= bbt.beats) {
+ pos_bbt.bars--;
+ pos_bbt.beats = divisions - (bbt.beats - pos_bbt.beats);
+ } else {
+ pos_bbt.beats -= bbt.beats;
+ }
+
+ return offset - frame_at_minute (minute_at_bbt_locked (_metrics, pos_bbt));
+ }
+
+ return 0;
}
framepos_t
TempoMap::round_to_beat_subdivision (framepos_t fr, int sub_num, RoundMode dir)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- uint32_t ticks = (uint32_t) floor (max (0.0, beat_at_frame_locked (_metrics, fr)) * BBT_Time::ticks_per_beat);
+ uint32_t ticks = (uint32_t) floor (max (0.0, beat_at_minute_locked (_metrics, minute_at_frame (fr))) * BBT_Time::ticks_per_beat);
uint32_t beats = (uint32_t) floor (ticks / BBT_Time::ticks_per_beat);
uint32_t ticks_one_subdivisions_worth = (uint32_t) BBT_Time::ticks_per_beat / sub_num;
}
}
- const framepos_t ret_frame = frame_at_beat_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat));
+ const framepos_t ret_frame = frame_at_minute (minute_at_beat_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat)));
return ret_frame;
}
TempoMap::round_to_quarter_note_subdivision (framepos_t fr, int sub_num, RoundMode dir)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- uint32_t ticks = (uint32_t) floor (max (0.0, quarter_note_at_frame_locked (_metrics, fr)) * BBT_Time::ticks_per_beat);
+ uint32_t ticks = (uint32_t) floor (max (0.0, quarter_note_at_minute_locked (_metrics, minute_at_frame (fr))) * BBT_Time::ticks_per_beat);
uint32_t beats = (uint32_t) floor (ticks / BBT_Time::ticks_per_beat);
uint32_t ticks_one_subdivisions_worth = (uint32_t) BBT_Time::ticks_per_beat / sub_num;
}
}
- const framepos_t ret_frame = frame_at_quarter_note_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat));
+ const framepos_t ret_frame = frame_at_minute (minute_at_quarter_note_locked (_metrics, beats + (ticks / BBT_Time::ticks_per_beat)));
return ret_frame;
}
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- const double beat_at_framepos = max (0.0, beat_at_frame_locked (_metrics, frame));
+ const double beat_at_framepos = max (0.0, beat_at_minute_locked (_metrics, minute_at_frame (frame)));
BBT_Time bbt (bbt_at_beat_locked (_metrics, beat_at_framepos));
switch (type) {
/* find bar previous to 'frame' */
bbt.beats = 1;
bbt.ticks = 0;
- return frame_at_bbt_locked (_metrics, bbt);
+ return frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
} else if (dir > 0) {
/* find bar following 'frame' */
++bbt.bars;
bbt.beats = 1;
bbt.ticks = 0;
- return frame_at_bbt_locked (_metrics, bbt);
+ return frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
} else {
/* true rounding: find nearest bar */
- framepos_t raw_ft = frame_at_bbt_locked (_metrics, bbt);
+ framepos_t raw_ft = frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
bbt.beats = 1;
bbt.ticks = 0;
- framepos_t prev_ft = frame_at_bbt_locked (_metrics, bbt);
+ framepos_t prev_ft = frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
++bbt.bars;
- framepos_t next_ft = frame_at_bbt_locked (_metrics, bbt);
+ framepos_t next_ft = frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
if ((raw_ft - prev_ft) > (next_ft - prev_ft) / 2) {
return next_ft;
case Beat:
if (dir < 0) {
- return frame_at_beat_locked (_metrics, floor (beat_at_framepos));
+ return frame_at_minute (minute_at_beat_locked (_metrics, floor (beat_at_framepos)));
} else if (dir > 0) {
- return frame_at_beat_locked (_metrics, ceil (beat_at_framepos));
+ return frame_at_minute (minute_at_beat_locked (_metrics, ceil (beat_at_framepos)));
} else {
- return frame_at_beat_locked (_metrics, floor (beat_at_framepos + 0.5));
+ return frame_at_minute (minute_at_beat_locked (_metrics, floor (beat_at_framepos + 0.5)));
}
break;
}
void
TempoMap::get_grid (vector<TempoMap::BBTPoint>& points,
- framepos_t lower, framepos_t upper)
+ framepos_t lower, framepos_t upper, uint32_t bar_mod)
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- int32_t cnt = ceil (beat_at_frame_locked (_metrics, lower));
+ int32_t cnt = ceil (beat_at_minute_locked (_metrics, minute_at_frame (lower)));
framecnt_t pos = 0;
/* although the map handles negative beats, bbt doesn't. */
if (cnt < 0.0) {
cnt = 0.0;
}
- if (frame_at_beat_locked (_metrics, cnt) >= upper) {
+ if (minute_at_beat_locked (_metrics, cnt) >= minute_at_frame (upper)) {
return;
}
+ if (bar_mod == 0) {
+ while (pos >= 0 && pos < upper) {
+ pos = frame_at_minute (minute_at_beat_locked (_metrics, cnt));
+ const TempoSection tempo = tempo_section_at_minute_locked (_metrics, minute_at_frame (pos));
+ const MeterSection meter = meter_section_at_minute_locked (_metrics, minute_at_frame (pos));
+ const BBT_Time bbt = bbt_at_beat_locked (_metrics, cnt);
+ points.push_back (BBTPoint (meter, tempo_at_minute_locked (_metrics, minute_at_frame (pos)), pos, bbt.bars, bbt.beats, tempo.c_func()));
+ ++cnt;
+ }
+ } else {
+ BBT_Time bbt = bbt_at_minute_locked (_metrics, minute_at_frame (lower));
+ bbt.beats = 1;
+ bbt.ticks = 0;
+
+ if (bar_mod != 1) {
+ bbt.bars -= bbt.bars % bar_mod;
+ ++bbt.bars;
+ }
- while (pos < upper) {
- pos = frame_at_beat_locked (_metrics, cnt);
- const TempoSection tempo = tempo_section_at_frame_locked (_metrics, pos);
- const MeterSection meter = meter_section_at_frame_locked (_metrics, pos);
- const BBT_Time bbt = bbt_at_beat_locked (_metrics, cnt);
- points.push_back (BBTPoint (meter, tempo_at_frame_locked (_metrics, pos), pos, bbt.bars, bbt.beats, tempo.c_func()));
- ++cnt;
+ while (pos >= 0 && pos < upper) {
+ pos = frame_at_minute (minute_at_bbt_locked (_metrics, bbt));
+ const TempoSection tempo = tempo_section_at_minute_locked (_metrics, minute_at_frame (pos));
+ const MeterSection meter = meter_section_at_minute_locked (_metrics, minute_at_frame (pos));
+ points.push_back (BBTPoint (meter, tempo_at_minute_locked (_metrics, minute_at_frame (pos)), pos, bbt.bars, bbt.beats, tempo.c_func()));
+ bbt.bars += bar_mod;
+ }
}
}
TempoMap::tempo_section_at_frame (framepos_t frame) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return tempo_section_at_frame_locked (_metrics, frame);
+
+ return tempo_section_at_minute_locked (_metrics, minute_at_frame (frame));
}
const TempoSection&
-TempoMap::tempo_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const
+TempoMap::tempo_section_at_minute_locked (const Metrics& metrics, double minute) const
{
TempoSection* prev = 0;
if (!t->active()) {
continue;
}
- if (prev && t->frame() > frame) {
+ if (prev && t->minute() > minute) {
break;
}
do that stuff based on the beat_at_frame and frame_at_beat api
*/
double
-TempoMap::frames_per_beat_at (const framepos_t& frame, const framecnt_t& sr) const
+TempoMap::frames_per_quarter_note_at (const framepos_t& frame, const framecnt_t& sr) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
ts_at = t;
}
}
+ assert (ts_at);
if (ts_after) {
- return (60.0 * _frame_rate) / (ts_at->tempo_at_frame (frame, _frame_rate) * 4.0);
+ return (60.0 * _frame_rate) / ts_at->tempo_at_minute (minute_at_frame (frame)).quarter_notes_per_minute();
}
/* must be treated as constant tempo */
- return ts_at->frames_per_beat (_frame_rate);
+ return ts_at->frames_per_quarter_note (_frame_rate);
}
const MeterSection&
-TempoMap::meter_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const
+TempoMap::meter_section_at_frame (framepos_t frame) const
+{
+ Glib::Threads::RWLock::ReaderLock lm (lock);
+ return meter_section_at_minute_locked (_metrics, minute_at_frame (frame));
+}
+
+const MeterSection&
+TempoMap::meter_section_at_minute_locked (const Metrics& metrics, double minute) const
{
Metrics::const_iterator i;
MeterSection* prev = 0;
if (!(*i)->is_tempo()) {
m = static_cast<MeterSection*> (*i);
- if (prev && (*i)->frame() > frame) {
+ if (prev && (*i)->minute() > minute) {
break;
}
return *prev;
}
-
-const MeterSection&
-TempoMap::meter_section_at_frame (framepos_t frame) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
- return meter_section_at_frame_locked (_metrics, frame);
-}
-
const MeterSection&
TempoMap::meter_section_at_beat_locked (const Metrics& metrics, const double& beat) const
{
pair<double, BBT_Time> bbt = make_pair (0.0, BBT_Time (1, 1, 0));
m->set_beat (bbt);
m->set_pulse (0.0);
- m->set_frame (0);
+ m->set_minute (0.0);
m->set_position_lock_style (AudioTime);
prev_m = m;
continue;
if (!t->movable()) {
t->set_pulse (0.0);
- t->set_frame (0);
+ t->set_minute (0.0);
t->set_position_lock_style (AudioTime);
prev_t = t;
continue;
if (child->name() == TempoSection::xml_state_node_name) {
try {
- TempoSection* ts = new TempoSection (*child);
+ TempoSection* ts = new TempoSection (*child, _frame_rate);
_metrics.push_back (ts);
}
} else if (child->name() == MeterSection::xml_state_node_name) {
try {
- MeterSection* ms = new MeterSection (*child);
+ MeterSection* ms = new MeterSection (*child, _frame_rate);
_metrics.push_back (ms);
}
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 (pulse = 1/" << t->note_type() << ") at " << t->pulse() << " frame= " << t->frame() << " (movable? "
- << t->movable() << ')' << " pos lock: " << enum_2_string (t->position_lock_style()) << std::endl;
- o << "current : " << t->beats_per_minute() << " | " << t->pulse() << " | " << t->frame() << std::endl;
+ o << "Tempo @ " << *i << t->note_types_per_minute() << " BPM (pulse = 1/" << t->note_type()
+ << " type= " << enum_2_string (t->type()) << ") " << " at pulse= " << t->pulse()
+ << " minute= " << t->minute() << " frame= " << t->frame() << " (movable? " << t->movable() << ')'
+ << " pos lock: " << enum_2_string (t->position_lock_style()) << std::endl;
if (prev_t) {
- o << "previous : " << prev_t->beats_per_minute() << " | " << prev_t->pulse() << " | " << prev_t->frame() << std::endl;
- o << "calculated : " << prev_t->tempo_at_pulse (t->pulse()) * prev_t->note_type() << " | " << prev_t->pulse_at_tempo (t->pulses_per_minute(), t->frame(), _frame_rate) << " | " << prev_t->frame_at_tempo (t->pulses_per_minute(), t->pulse(), _frame_rate) << std::endl;
+ o << std::setprecision (17) << " current : " << t->note_types_per_minute()
+ << " | " << t->pulse() << " | " << t->frame() << " | " << t->minute() << std::endl;
+ o << " previous : " << prev_t->note_types_per_minute()
+ << " | " << prev_t->pulse() << " | " << prev_t->frame() << " | " << prev_t->minute() << std::endl;
+ o << " calculated : " << prev_t->tempo_at_pulse (t->pulse())
+ << " | " << prev_t->pulse_at_ntpm (t->note_types_per_minute(), t->minute())
+ << " | " << frame_at_minute (prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()))
+ << " | " << prev_t->minute_at_ntpm (t->note_types_per_minute(), t->pulse()) << std::endl;
}
prev_t = t;
} else if ((m = dynamic_cast<const MeterSection*>(*i)) != 0) {
- o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->bbt() << " frame= " << m->frame()
- << " pulse: " << m->pulse() << " beat : " << m->beat() << " pos lock: " << enum_2_string (m->position_lock_style()) << " (movable? " << m->movable() << ')' << endl;
+ o << "Meter @ " << *i << ' ' << m->divisions_per_bar() << '/' << m->note_divisor() << " at " << m->bbt()
+ << " frame= " << m->frame() << " pulse: " << m->pulse() << " beat : " << m->beat()
+ << " pos lock: " << enum_2_string (m->position_lock_style()) << " (movable? " << m->movable() << ')' << endl;
}
}
o << "------" << std::endl;
void
TempoMap::insert_time (framepos_t where, framecnt_t amount)
{
- {
- Glib::Threads::RWLock::WriterLock lm (lock);
- for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
- if ((*i)->frame() >= where && (*i)->movable ()) {
- (*i)->set_frame ((*i)->frame() + amount);
- }
- }
-
- /* now reset the BBT time of all metrics, based on their new
- * audio time. This is the only place where we do this reverse
- * timestamp.
- */
-
- Metrics::iterator i;
- const MeterSection* meter;
- const TempoSection* tempo;
- MeterSection *m;
- TempoSection *t;
-
- meter = &first_meter ();
- tempo = &first_tempo ();
-
- BBT_Time start;
- BBT_Time end;
+ for (Metrics::reverse_iterator i = _metrics.rbegin(); i != _metrics.rend(); ++i) {
+ if ((*i)->frame() >= where && (*i)->movable ()) {
+ MeterSection* ms;
+ TempoSection* ts;
- // cerr << "\n###################### TIMESTAMP via AUDIO ##############\n" << endl;
-
- bool first = true;
- MetricSection* prev = 0;
-
- for (i = _metrics.begin(); i != _metrics.end(); ++i) {
-
- BBT_Time bbt;
- //TempoMetric metric (*meter, *tempo);
- MeterSection* ms = const_cast<MeterSection*>(meter);
- TempoSection* ts = const_cast<TempoSection*>(tempo);
- if (prev) {
- if (ts){
- if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
- if (!t->active()) {
- continue;
- }
- ts->set_pulse (t->pulse());
- }
- if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
- ts->set_pulse (m->pulse());
- }
- ts->set_frame (prev->frame());
-
- }
- if (ms) {
- if ((m = dynamic_cast<MeterSection*>(prev)) != 0) {
- pair<double, BBT_Time> start = make_pair (m->beat(), m->bbt());
- ms->set_beat (start);
- ms->set_pulse (m->pulse());
- }
- if ((t = dynamic_cast<TempoSection*>(prev)) != 0) {
- if (!t->active()) {
- continue;
- }
- const double beat = beat_at_pulse_locked (_metrics, t->pulse());
- pair<double, BBT_Time> start = make_pair (beat, bbt_at_beat_locked (_metrics, beat));
- ms->set_beat (start);
- ms->set_pulse (t->pulse());
- }
- ms->set_frame (prev->frame());
- }
-
- } else {
- // metric will be at frames=0 bbt=1|1|0 by default
- // which is correct for our purpose
+ if ((ms = dynamic_cast <MeterSection*>(*i)) != 0) {
+ gui_move_meter (ms, (*i)->frame() + amount);
}
- // cerr << bbt << endl;
-
- if ((t = dynamic_cast<TempoSection*>(*i)) != 0) {
- if (!t->active()) {
- continue;
- }
- t->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
- tempo = t;
- // cerr << "NEW TEMPO, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
- } else if ((m = dynamic_cast<MeterSection*>(*i)) != 0) {
- bbt = bbt_at_frame_locked (_metrics, m->frame());
-
- // cerr << "timestamp @ " << (*i)->frame() << " with " << bbt.bars << "|" << bbt.beats << "|" << bbt.ticks << " => ";
-
- if (first) {
- first = false;
- } else {
-
- if (bbt.ticks > BBT_Time::ticks_per_beat/2) {
- /* round up to next beat */
- bbt.beats += 1;
- }
-
- bbt.ticks = 0;
-
- if (bbt.beats != 1) {
- /* round up to next bar */
- bbt.bars += 1;
- bbt.beats = 1;
- }
- }
- pair<double, BBT_Time> start = make_pair (max (0.0, beat_at_frame_locked (_metrics, m->frame())), bbt);
- m->set_beat (start);
- m->set_pulse (pulse_at_frame_locked (_metrics, m->frame()));
- meter = m;
- // cerr << "NEW METER, frame = " << (*i)->frame() << " beat = " << (*i)->pulse() <<endl;
- } else {
- fatal << _("programming error: unhandled MetricSection type") << endmsg;
- abort(); /*NOTREACHED*/
+ if ((ts = dynamic_cast <TempoSection*>(*i)) != 0) {
+ gui_move_tempo (ts, (*i)->frame() + amount, 0);
}
-
- prev = (*i);
}
-
- recompute_map (_metrics);
}
-
PropertyChanged (PropertyChange ());
}
+
bool
TempoMap::remove_time (framepos_t where, framecnt_t amount)
{
}
else if ((*i)->frame() >= where) {
// TODO: make sure that moved tempo/meter markers are rounded to beat/bar boundaries
- (*i)->set_frame ((*i)->frame() - amount);
+ (*i)->set_minute ((*i)->minute() - minute_at_frame (amount));
if ((*i)->frame() == where) {
// marker was immediately after end of range
tempo_after = dynamic_cast<TempoSection*> (*i);
//find the last TEMPO and METER metric (if any) and move it to the cut point so future stuff is correct
if (last_tempo && !tempo_after) {
metric_kill_list.remove(last_tempo);
- last_tempo->set_frame(where);
+ last_tempo->set_minute (minute_at_frame (where));
moved = true;
}
if (last_meter && !meter_after) {
metric_kill_list.remove(last_meter);
- last_meter->set_frame(where);
+ last_meter->set_minute (minute_at_frame (where));
moved = true;
}
return moved;
}
-/** Add some (fractional) beats to a session frame position, and return the result in frames.
+/** Add some (fractional) Beats to a session frame position, and return the result in frames.
* pos can be -ve, if required.
*/
framepos_t
-TempoMap::framepos_plus_beats (framepos_t frame, Evoral::Beats beats) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
-
- return frame_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, frame) + beats.to_double());
-}
-framepos_t
-TempoMap::framepos_plus_qn (framepos_t frame, Evoral::Beats quarter_note) const
+TempoMap::framepos_plus_qn (framepos_t frame, Evoral::Beats beats) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
+ const double frame_qn = quarter_notes_between_frames_locked (_metrics, 0, frame);
- return frame_at_quarter_note_locked (_metrics, quarter_note_at_frame_locked (_metrics, frame) + quarter_note.to_double());
+ return frame_at_minute (minute_at_quarter_note_locked (_metrics, frame_qn + beats.to_double()));
}
-/** Subtract some (fractional) beats from a frame position, and return the result in frames */
-framepos_t
-TempoMap::framepos_minus_beats (framepos_t pos, Evoral::Beats beats) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
-
- return frame_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, pos) - beats.to_double());
-}
-
-/** Add the BBT interval op to pos and return the result */
framepos_t
TempoMap::framepos_plus_bbt (framepos_t pos, BBT_Time op) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- BBT_Time pos_bbt = bbt_at_beat_locked (_metrics, beat_at_frame_locked (_metrics, pos));
+ BBT_Time pos_bbt = bbt_at_beat_locked (_metrics, beat_at_minute_locked (_metrics, minute_at_frame (pos)));
pos_bbt.ticks += op.ticks;
if (pos_bbt.ticks >= BBT_Time::ticks_per_beat) {
++pos_bbt.beats;
}
pos_bbt.bars += op.bars;
- return frame_at_bbt_locked (_metrics, pos_bbt);
+ return frame_at_minute (minute_at_bbt_locked (_metrics, pos_bbt));
}
/** Count the number of beats that are equivalent to distance when going forward,
starting at pos.
*/
-Evoral::Beats
-TempoMap::framewalk_to_beats (framepos_t pos, framecnt_t distance) const
-{
- Glib::Threads::RWLock::ReaderLock lm (lock);
-
- return Evoral::Beats (beat_at_frame_locked (_metrics, pos + distance) - beat_at_frame_locked (_metrics, pos));
-}
-
Evoral::Beats
TempoMap::framewalk_to_qn (framepos_t pos, framecnt_t distance) const
{
Glib::Threads::RWLock::ReaderLock lm (lock);
- return Evoral::Beats (quarter_note_at_frame_locked (_metrics, pos + distance) - quarter_note_at_frame_locked (_metrics, pos));
+ return Evoral::Beats (quarter_notes_between_frames_locked (_metrics, pos, pos + distance));
}
+
struct bbtcmp {
bool operator() (const BBT_Time& a, const BBT_Time& b) {
return a < b;
std::ostream&
operator<< (std::ostream& o, const Tempo& t) {
- return o << t.beats_per_minute() << " 1/" << t.note_type() << "'s per minute";
+ return o << t.note_types_per_minute() << " 1/" << t.note_type() << "'s per minute";
}
std::ostream&
projects / ardour.git / blobdiff