class LIBARDOUR_API Tempo {
public:
/**
- * @param bpm Beats Per Minute
+ * @param npm Note Types per minute
* @param type Note Type (default `4': quarter note)
*/
- Tempo (double bpm, double type=4.0) // defaulting to quarter note
- : _beats_per_minute (bpm), _note_type(type) {}
+ Tempo (double npm, double type=4.0) // defaulting to quarter note
+ : _beats_per_minute (npm), _note_type(type) {}
- /* ..or more aptly 'pulse divisions per minute'.
- Nothing to do with actual beats, which are defined by the meter and tempo.
+ /*
+ note types per minute.
*/
double beats_per_minute () const { return _beats_per_minute; }
void set_beats_per_minute (double bpm) { _beats_per_minute = bpm; }
double note_type () const { return _note_type; }
- double pulses_per_minute () const { return _beats_per_minute / _note_type; }
- /** audio samples per beat
+ /** audio samples per quarter note beat.
+ * this is only useful for constant tempo and should not be used.
+ * if you want an instantaneous value for this, use frames_per_beat_at() instead.
* @param sr samplerate
*/
double frames_per_beat (framecnt_t sr) const {
return (60.0 * sr) / _beats_per_minute;
}
- double frames_per_pulse (framecnt_t sr) const {
- return (_note_type * 60.0 * sr) / _beats_per_minute;
- }
protected:
double _beats_per_minute;
/** A section of timeline with a certain Tempo or Meter. */
class LIBARDOUR_API MetricSection {
public:
- MetricSection (double pulse, framepos_t frame, PositionLockStyle pls, bool is_tempo)
- : _pulse (pulse), _frame (frame), _movable (true), _position_lock_style (pls), _is_tempo (is_tempo) {}
+ MetricSection (double pulse, double minute, PositionLockStyle pls, bool is_tempo, framecnt_t sample_rate)
+ : _pulse (pulse), _minute (minute), _movable (true), _position_lock_style (pls), _is_tempo (is_tempo), _sample_rate (sample_rate) {}
virtual ~MetricSection() {}
const double& pulse () const { return _pulse; }
void set_pulse (double pulse) { _pulse = pulse; }
- framepos_t frame() const { return _frame; }
- virtual void set_frame (framepos_t f) {
- _frame = f;
+ double minute() const { return _minute; }
+ virtual void set_minute (double m) {
+ _minute = m;
}
+ framepos_t frame () const { return frame_at_minute (_minute); }
+
void set_movable (bool yn) { _movable = yn; }
bool movable() const { return _movable; }
void set_position_lock_style (PositionLockStyle ps) { _position_lock_style = ps; }
bool is_tempo () const { return _is_tempo; }
+ framepos_t frame_at_minute (const double& time) const;
+ double minute_at_frame (const framepos_t& frame) const;
+
private:
+
double _pulse;
- framepos_t _frame;
+ double _minute;
bool _movable;
PositionLockStyle _position_lock_style;
const bool _is_tempo;
+ framecnt_t _sample_rate;
};
/** A section of timeline with a certain Meter. */
class LIBARDOUR_API MeterSection : public MetricSection, public Meter {
public:
- MeterSection (double pulse, framepos_t frame, double beat, const Timecode::BBT_Time& bbt, double bpb, double note_type, PositionLockStyle pls)
- : MetricSection (pulse, frame, pls, false), Meter (bpb, note_type), _bbt (bbt), _beat (beat) {}
+ MeterSection (double pulse, double minute, double beat, const Timecode::BBT_Time& bbt, double bpb, double note_type, PositionLockStyle pls, framecnt_t sr)
+ : MetricSection (pulse, minute, pls, false, sr), Meter (bpb, note_type), _bbt (bbt), _beat (beat) {}
- MeterSection (const XMLNode&);
+ MeterSection (const XMLNode&, const framecnt_t sample_rate);
static const std::string xml_state_node_name;
Constant,
};
- TempoSection (const double& pulse, const framepos_t& frame, double qpm, double note_type, Type tempo_type, PositionLockStyle pls)
- : MetricSection (pulse, frame, pls, true), Tempo (qpm, note_type), _type (tempo_type), _c_func (0.0), _active (true), _locked_to_meter (false) {}
+ TempoSection (const double& pulse, const double& minute, double qpm, double note_type, Type tempo_type, PositionLockStyle pls, framecnt_t sr)
+ : MetricSection (pulse, minute, pls, true, sr), Tempo (qpm, note_type), _type (tempo_type), _c_func (0.0), _active (true), _locked_to_meter (false) {}
- TempoSection (const XMLNode&);
+ TempoSection (const XMLNode&, const framecnt_t sample_rate);
static const std::string xml_state_node_name;
bool locked_to_meter () const { return _locked_to_meter; }
void set_locked_to_meter (bool yn) { _locked_to_meter = yn; }
- double tempo_at_frame (const framepos_t& frame, const framecnt_t& frame_rate) const;
- framepos_t frame_at_tempo (const double& ppm, const double& beat, const framecnt_t& frame_rate) const;
+ double tempo_at_minute (const double& minute) const;
+ double minute_at_tempo (const double& bpm, const double& pulse) const;
double tempo_at_pulse (const double& pulse) const;
- double pulse_at_tempo (const double& ppm, const framepos_t& frame, const framecnt_t& frame_rate) const;
+ double pulse_at_tempo (const double& bpm, const double& minute) const;
- double pulse_at_frame (const framepos_t& frame, const framepos_t& frame_rate) const;
- framepos_t frame_at_pulse (const double& pulse, const framecnt_t& frame_rate) const;
+ double pulse_at_minute (const double& minute) const;
+ double minute_at_pulse (const double& pulse) const;
- double compute_c_func_pulse (const double& end_bpm, const double& end_pulse, const framecnt_t& frame_rate);
- double compute_c_func_frame (const double& end_bpm, const framepos_t& end_frame, const framecnt_t& frame_rate) const;
+ double compute_c_func_pulse (const double& end_bpm, const double& end_pulse) const;
+ double compute_c_func_minute (const double& end_bpm, const double& end_minute) const;
Timecode::BBT_Time legacy_bbt () { return _legacy_bbt; }
private:
- framepos_t minute_to_frame (const double& time, const framecnt_t& frame_rate) const;
- double frame_to_minute (const framepos_t& frame, const framecnt_t& frame_rate) const;
-
/* tempo ramp functions. zero-based with time in minutes,
* 'tick tempo' in ticks per minute and tempo in bpm.
* time relative to section start.
double a_func (double end_tpm, double c_func) const;
double c_func (double end_tpm, double end_time) const;
- double pulse_tempo_at_time (const double& time) const;
- double time_at_pulse_tempo (const double& pulse_tempo) const;
+ double _tempo_at_time (const double& time) const;
+ double _time_at_tempo (const double& tempo) const;
- double pulse_tempo_at_pulse (const double& pulse) const;
- double pulse_at_pulse_tempo (const double& pulse_tempo) const;
+ double _tempo_at_pulse (const double& pulse) const;
+ double _pulse_at_tempo (const double& tempo) const;
- double pulse_at_time (const double& time) const;
- double time_at_pulse (const double& pulse) const;
+ double _pulse_at_time (const double& time) const;
+ double _time_at_pulse (const double& pulse) const;
/* this value provides a fractional offset into the bar in which
the tempo section is located in. A value of 0.0 indicates that
class LIBARDOUR_API TempoMetric {
public:
TempoMetric (const Meter& m, const Tempo& t)
- : _meter (&m), _tempo (&t), _frame (0) {}
+ : _meter (&m), _tempo (&t), _minute (0.0), _pulse (0.0) {}
void set_tempo (const Tempo& t) { _tempo = &t; }
void set_meter (const Meter& m) { _meter = &m; }
- void set_frame (framepos_t f) { _frame = f; }
+ void set_minute (double m) { _minute = m; }
void set_pulse (const double& p) { _pulse = p; }
void set_metric (const MetricSection* section) {
set_tempo(*tempo);
}
- set_frame (section->frame());
+ set_minute (section->minute());
set_pulse (section->pulse());
}
const Meter& meter() const { return *_meter; }
const Tempo& tempo() const { return *_tempo; }
- framepos_t frame() const { return _frame; }
+ double minute() const { return _minute; }
const double& pulse() const { return _pulse; }
private:
const Meter* _meter;
const Tempo* _tempo;
- framepos_t _frame;
+ double _minute;
double _pulse;
};
}
void get_grid (std::vector<BBTPoint>&,
- framepos_t start, framepos_t end);
+ framepos_t start, framepos_t end, uint32_t bar_mod = 0);
static const Tempo& default_tempo() { return _default_tempo; }
static const Meter& default_meter() { return _default_meter; }
* @param where bbt position of new section
* @param frame frame position of new section. ignored if pls == MusicTime
*/
- MeterSection* add_meter (const Meter&, const double& beat, const Timecode::BBT_Time& where, const framepos_t& frame, PositionLockStyle pls);
+ MeterSection* add_meter (const Meter&, const double& beat, const Timecode::BBT_Time& where, PositionLockStyle pls);
void remove_tempo (const TempoSection&, bool send_signal);
void remove_meter (const MeterSection&, bool send_signal);
void replace_tempo (const TempoSection&, const Tempo&, const double& pulse, const framepos_t& frame
, TempoSection::Type type, PositionLockStyle pls);
- void replace_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where, const framepos_t& frame
- , PositionLockStyle pls);
+ void replace_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where, PositionLockStyle pls);
framepos_t round_to_bar (framepos_t frame, RoundMode dir);
framepos_t round_to_beat (framepos_t frame, RoundMode dir);
framepos_t round_to_beat_subdivision (framepos_t fr, int sub_num, RoundMode dir);
+ framepos_t round_to_quarter_note_subdivision (framepos_t fr, int sub_num, RoundMode dir);
void set_length (framepos_t frames);
/* TEMPO- AND METER-SENSITIVE FUNCTIONS
- bbt_at_frame(), frame_at_bbt(), beat_at_frame(), frame_at_beat(), tempo_at_beat()
+ bbt_at_frame(), frame_at_bbt(), beat_at_frame(), frame_at_beat()
and bbt_duration_at()
are all sensitive to tempo and meter, and will give answers
that align with the grid formed by tempo and meter sections.
They SHOULD NOT be used to determine the position of events
- whose location is canonically defined in beats.
+ whose location is canonically defined in Evoral::Beats.
*/
double beat_at_frame (const framecnt_t& frame) const;
framepos_t frame_at_beat (const double& beat) const;
- Tempo tempo_at_frame (const framepos_t& frame) const;
- framepos_t frame_at_tempo (const Tempo& tempo) const;
-
- Tempo tempo_at_beat (const double& beat) const;
-
const Meter& meter_at_frame (framepos_t) const;
- /* you probably only need to use pulses when moving tempos */
- double pulse_at_beat (const double& beat) const;
- double beat_at_pulse (const double& pulse) const;
-
- double pulse_at_frame (const framecnt_t& frame) const;
- framepos_t frame_at_pulse (const double& pulse) const;
-
- /* bbt - it's nearly always better to use beats.*/
+ /* bbt - it's nearly always better to use meter-based beat (above)
+ unless tick resolution is desirable.
+ */
Timecode::BBT_Time bbt_at_frame (framepos_t when);
Timecode::BBT_Time bbt_at_frame_rt (framepos_t when);
framepos_t frame_at_bbt (const Timecode::BBT_Time&);
double beat_at_bbt (const Timecode::BBT_Time& bbt);
Timecode::BBT_Time bbt_at_beat (const double& beats);
- double pulse_at_bbt (const Timecode::BBT_Time& bbt);
- Timecode::BBT_Time bbt_at_pulse (const double& pulse);
+ double quarter_note_at_bbt (const Timecode::BBT_Time& bbt);
+ double quarter_note_at_bbt_rt (const Timecode::BBT_Time& bbt);
+ Timecode::BBT_Time bbt_at_quarter_note (const double& quarter_note);
framecnt_t bbt_duration_at (framepos_t, const Timecode::BBT_Time&, int dir);
+ framepos_t framepos_plus_bbt (framepos_t pos, Timecode::BBT_Time b) const;
/* TEMPO-SENSITIVE FUNCTIONS
- These next 4 functions will all take tempo in account and should be
+ These next 2 functions will all take tempo in account and should be
used to determine position (and in the last case, distance in beats)
when tempo matters but meter does not.
They SHOULD be used to determine the position of events
- whose location is canonically defined in beats.
+ whose location is canonically defined in Evoral::Beats.
*/
- framepos_t framepos_plus_bbt (framepos_t pos, Timecode::BBT_Time b) const;
- framepos_t framepos_plus_beats (framepos_t, Evoral::Beats) const;
- framepos_t framepos_minus_beats (framepos_t, Evoral::Beats) const;
- Evoral::Beats framewalk_to_beats (framepos_t pos, framecnt_t distance) const;
+ framepos_t framepos_plus_qn (framepos_t, Evoral::Beats) const;
+ Evoral::Beats framewalk_to_qn (framepos_t pos, framecnt_t distance) const;
+
+ /* quarter note related functions are also tempo-sensitive and ignore meter.
+ quarter notes may be compared with and assigned to Evoral::Beats.
+ */
+ double quarter_note_at_frame (const framepos_t frame);
+ double quarter_note_at_frame_rt (const framepos_t frame);
+ framepos_t frame_at_quarter_note (const double quarter_note);
+
+ framecnt_t frames_between_quarter_notes (const double start, const double end);
+
+ double quarter_note_at_beat (const double beat);
+ double beat_at_quarter_note (const double beat);
+
+ /* obtain a musical subdivision via a frame position and magic note divisor.*/
+ double exact_qn_at_frame (const framepos_t& frame, const int32_t sub_num);
+ double exact_beat_at_frame (const framepos_t& frame, const int32_t sub_num);
+
+ Tempo tempo_at_frame (const framepos_t& frame) const;
+ framepos_t frame_at_tempo (const Tempo& tempo) const;
+ Tempo tempo_at_quarter_note (const double& beat) const;
+ double quarter_note_at_tempo (const Tempo& tempo) const;
void gui_move_tempo (TempoSection*, const framepos_t& frame, const int& sub_num);
void gui_move_meter (MeterSection*, const framepos_t& frame);
bool gui_change_tempo (TempoSection*, const Tempo& bpm);
- void gui_dilate_tempo (TempoSection* tempo, const framepos_t& frame, const framepos_t& end_frame, const double& pulse);
-
- double exact_beat_at_frame (const framepos_t& frame, const int32_t sub_num);
+ void gui_dilate_tempo (TempoSection* tempo, const framepos_t& frame, const framepos_t& end_frame);
std::pair<double, framepos_t> predict_tempo_position (TempoSection* section, const Timecode::BBT_Time& bbt);
bool can_solve_bbt (TempoSection* section, const Timecode::BBT_Time& bbt);
private:
- double beat_at_frame_locked (const Metrics& metrics, const framecnt_t& frame) const;
- framepos_t frame_at_beat_locked (const Metrics& metrics, const double& beat) const;
+ double beat_at_minute_locked (const Metrics& metrics, const double& minute) const;
+ double minute_at_beat_locked (const Metrics& metrics, const double& beat) const;
double pulse_at_beat_locked (const Metrics& metrics, const double& beat) const;
double beat_at_pulse_locked (const Metrics& metrics, const double& pulse) const;
- double pulse_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const;
- framepos_t frame_at_pulse_locked (const Metrics& metrics, const double& pulse) const;
+ double pulse_at_minute_locked (const Metrics& metrics, const double& minute) const;
+ double minute_at_pulse_locked (const Metrics& metrics, const double& pulse) const;
- Tempo tempo_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const;
- framepos_t frame_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const;
+ Tempo tempo_at_minute_locked (const Metrics& metrics, const double& minute) const;
+ double minute_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const;
- Timecode::BBT_Time bbt_at_frame_locked (const Metrics& metrics, const framepos_t& frame) const;
- framepos_t frame_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time&) const;
+ Tempo tempo_at_pulse_locked (const Metrics& metrics, const double& pulse) const;
+ double pulse_at_tempo_locked (const Metrics& metrics, const Tempo& tempo) const;
+
+ Timecode::BBT_Time bbt_at_minute_locked (const Metrics& metrics, const double& minute) const;
+ double minute_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time&) const;
double beat_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const ;
Timecode::BBT_Time bbt_at_beat_locked (const Metrics& metrics, const double& beats) const;
double pulse_at_bbt_locked (const Metrics& metrics, const Timecode::BBT_Time& bbt) const;
Timecode::BBT_Time bbt_at_pulse_locked (const Metrics& metrics, const double& pulse) const;
- const TempoSection& tempo_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const;
+ double minute_at_quarter_note_locked (const Metrics& metrics, const double quarter_note) const;
+ double quarter_note_at_minute_locked (const Metrics& metrics, const double minute) const;
+
+ double quarter_note_at_beat_locked (const Metrics& metrics, const double beat) const;
+ double beat_at_quarter_note_locked (const Metrics& metrics, const double beat) const;
+
+ double minutes_between_quarter_notes_locked (const Metrics& metrics, const double start_qn, const double end_qn);
+
+ const TempoSection& tempo_section_at_minute_locked (const Metrics& metrics, double minute) const;
const TempoSection& tempo_section_at_beat_locked (const Metrics& metrics, const double& beat) const;
- const MeterSection& meter_section_at_frame_locked (const Metrics& metrics, framepos_t frame) const;
+ const MeterSection& meter_section_at_minute_locked (const Metrics& metrics, double minute) const;
const MeterSection& meter_section_at_beat_locked (const Metrics& metrics, const double& beat) const;
bool check_solved (const Metrics& metrics) const;
bool set_active_tempos (const Metrics& metrics, const framepos_t& frame);
- bool solve_map_frame (Metrics& metrics, TempoSection* section, const framepos_t& frame);
+ bool solve_map_minute (Metrics& metrics, TempoSection* section, const double& minute);
bool solve_map_pulse (Metrics& metrics, TempoSection* section, const double& pulse);
- bool solve_map_frame (Metrics& metrics, MeterSection* section, const framepos_t& frame);
+ bool solve_map_minute (Metrics& metrics, MeterSection* section, const double& minute);
bool solve_map_bbt (Metrics& metrics, MeterSection* section, const Timecode::BBT_Time& bbt);
double exact_beat_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t sub_num);
+ double exact_qn_at_frame_locked (const Metrics& metrics, const framepos_t& frame, const int32_t sub_num);
+
+ double minute_at_frame (const framepos_t frame) const;
+ framepos_t frame_at_minute (const double minute) const;
friend class ::BBTTest;
friend class ::FrameposPlusBeatsTest;
void do_insert (MetricSection* section);
- TempoSection* add_tempo_locked (const Tempo&, double pulse, framepos_t frame
+ TempoSection* add_tempo_locked (const Tempo&, double pulse, double minute
, TempoSection::Type type, PositionLockStyle pls, bool recompute, bool locked_to_meter = false);
- MeterSection* add_meter_locked (const Meter&, double beat, const Timecode::BBT_Time& where, framepos_t frame
- , PositionLockStyle pls, bool recompute);
+ MeterSection* add_meter_locked (const Meter&, double beat, const Timecode::BBT_Time& where, PositionLockStyle pls, bool recompute);
bool remove_tempo_locked (const TempoSection&);
bool remove_meter_locked (const MeterSection&);
projects / ardour.git / blobdiff