#include "pbd/stateful.h"
#include "pbd/statefuldestructible.h"
-#include "evoral/types.hpp"
+#include "evoral/Beats.hpp"
#include "ardour/ardour.h"
/** Tempo, the speed at which musical time progresses (BPM). */
class LIBARDOUR_API Tempo {
public:
+ /**
+ * @param bpm Beats 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) {}
double beats_per_minute () const { return _beats_per_minute;}
+ double ticks_per_minute () const { return _beats_per_minute * Timecode::BBT_Time::ticks_per_beat;}
double note_type () const { return _note_type;}
+ /** audio samples per beat
+ * @param sr samplerate
+ */
double frames_per_beat (framecnt_t sr) const {
return (60.0 * sr) / _beats_per_minute;
}
/** A section of timeline with a certain Tempo. */
class LIBARDOUR_API TempoSection : public MetricSection, public Tempo {
public:
- TempoSection (const Timecode::BBT_Time& start, double qpm, double note_type)
- : MetricSection (start), Tempo (qpm, note_type), _bar_offset (-1.0) {}
- TempoSection (framepos_t start, double qpm, double note_type)
- : MetricSection (start), Tempo (qpm, note_type), _bar_offset (-1.0) {}
+ enum TempoSectionType {
+ Ramp,
+ Constant,
+ };
+
+ TempoSection (const Timecode::BBT_Time& start, double qpm, double note_type, TempoSectionType tempo_type)
+ : MetricSection (start), Tempo (qpm, note_type), _bar_offset (-1.0), _type (tempo_type) {}
+ TempoSection (framepos_t start, double qpm, double note_type, TempoSectionType tempo_type)
+ : MetricSection (start), Tempo (qpm, note_type), _bar_offset (-1.0), _type (tempo_type) {}
TempoSection (const XMLNode&);
static const std::string xml_state_node_name;
void update_bbt_time_from_bar_offset (const Meter&);
double bar_offset() const { return _bar_offset; }
+ void set_type (TempoSectionType type);
+ TempoSectionType type () const { return _type; }
+
+ double tempo_at_frame (framepos_t frame, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+ framepos_t frame_at_tempo (double tempo, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+
+ double tick_at_frame (framepos_t frame, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+ framepos_t frame_at_tick (double tick, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+
+ double beat_at_frame (framepos_t frame, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+ framepos_t frame_at_beat (double beat, double end_bpm, framepos_t end_frame, framecnt_t frame_rate) const;
+
private:
+
+ framecnt_t minute_to_frame (double time, framecnt_t frame_rate) const;
+ double frame_to_minute (framecnt_t frame, 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 c_func (double end_tpm, double end_time) const;
+ double a_func (double begin_tpm, double end_tpm, double end_time) const;
+
+ double tempo_at_time (double time, double end_bpm, double end_time) const;
+ double time_at_tempo (double tempo, double end_bpm, double end_time) const;
+ double tick_tempo_at_time (double time, double end_tpm, double end_time) const;
+ double time_at_tick_tempo (double tick_tempo, double end_tpm, double end_time) const;
+
+ double tick_at_time (double time, double end_tpm, double end_time) const;
+ double time_at_tick (double tick, double end_tpm, double end_time) const;
+
+ double beat_at_time (double time, double end_tpm, double end_time) const;
+ double time_at_beat (double beat, double end_tpm, double end_time) 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
it occurs on the first beat of the bar, a value of 0.5 indicates
that it occurs halfway through the bar and so on.
-
+
this enables us to keep the tempo change at the same relative
position within the bar if/when the meter changes.
*/
double _bar_offset;
+ TempoSectionType _type;
};
typedef std::list<MetricSection*> Metrics;
Timecode::BBT_Time _start;
};
+/** Tempo Map - mapping of timecode to musical time.
+ * convert audio-samples, sample-rate to Bar/Beat/Tick, Meter/Tempo
+ */
class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
{
public:
struct BBTPoint {
framepos_t frame;
const MeterSection* meter;
- const TempoSection* tempo;
+ const Tempo* tempo;
uint32_t bar;
uint32_t beat;
-
- BBTPoint (const MeterSection& m, const TempoSection& t, framepos_t f,
+
+ BBTPoint (const MeterSection& m, const Tempo& t, framepos_t f,
uint32_t b, uint32_t e)
: frame (f), meter (&m), tempo (&t), bar (b), beat (e) {}
-
+
Timecode::BBT_Time bbt() const { return Timecode::BBT_Time (bar, beat, 0); }
operator Timecode::BBT_Time() const { return bbt(); }
operator framepos_t() const { return frame; }
bool is_bar() const { return beat == 1; }
};
- typedef std::vector<BBTPoint> BBTPointList;
-
template<class T> void apply_with_metrics (T& obj, void (T::*method)(const Metrics&)) {
Glib::Threads::RWLock::ReaderLock lm (lock);
(obj.*method)(metrics);
}
- void get_grid (BBTPointList::const_iterator&, BBTPointList::const_iterator&,
+ void get_grid (std::vector<BBTPoint>&,
framepos_t start, framepos_t end);
-
- /* TEMPO- AND METER-SENSITIVE FUNCTIONS
- bbt_time(), bbt_time_rt(), frame_time() and bbt_duration_at()
+ /* TEMPO- AND METER-SENSITIVE FUNCTIONS
+
+ bbt_time(), beat_at_frame(), frame_at_beat(), tick_at_frame(),
+ frame_at_tick(),frame_time() 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
+
+ They SHOULD NOT be used to determine the position of events
whose location is canonically defined in beats.
*/
void bbt_time (framepos_t when, Timecode::BBT_Time&);
- /* realtime safe variant of ::bbt_time(), will throw
- std::logic_error if the map is not large enough
- to provide an answer.
- */
- void bbt_time_rt (framepos_t when, Timecode::BBT_Time&);
+ double tick_at_frame (framecnt_t frame) const;
+ framecnt_t frame_at_tick (double tick) const;
+
+ double beat_at_frame (framecnt_t frame) const;
+ framecnt_t frame_at_beat (double beat) const;
+
framepos_t frame_time (const Timecode::BBT_Time&);
framecnt_t bbt_duration_at (framepos_t, const Timecode::BBT_Time&, int dir);
/* TEMPO-SENSITIVE FUNCTIONS
-
+
These next 4 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
+ They SHOULD be used to determine the position of events
whose location is canonically defined in beats.
*/
framepos_t framepos_plus_bbt (framepos_t pos, Timecode::BBT_Time b) const;
- framepos_t framepos_plus_beats (framepos_t, Evoral::MusicalTime) const;
- framepos_t framepos_minus_beats (framepos_t, Evoral::MusicalTime) const;
- Evoral::MusicalTime framewalk_to_beats (framepos_t pos, framecnt_t distance) 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;
static const Tempo& default_tempo() { return _default_tempo; }
static const Meter& default_meter() { return _default_meter; }
- const Tempo& tempo_at (framepos_t) const;
+ const Tempo tempo_at (framepos_t) const;
+ double frames_per_beat_at (framepos_t, framecnt_t sr) const;
+
const Meter& meter_at (framepos_t) const;
const TempoSection& tempo_section_at (framepos_t) const;
+ TempoSection* tempo_section_after (framepos_t) const;
+ const MeterSection& meter_section_at (framepos_t) const;
- void add_tempo (const Tempo&, Timecode::BBT_Time where);
+ void add_tempo (const Tempo&, Timecode::BBT_Time where, TempoSection::TempoSectionType type);
void add_meter (const Meter&, Timecode::BBT_Time where);
void remove_tempo (const TempoSection&, bool send_signal);
void remove_meter (const MeterSection&, bool send_signal);
- void replace_tempo (const TempoSection&, const Tempo&, const Timecode::BBT_Time& where);
+ void replace_tempo (const TempoSection&, const Tempo&, const Timecode::BBT_Time& where, TempoSection::TempoSectionType type);
void replace_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where);
- framepos_t round_to_bar (framepos_t frame, int dir);
- framepos_t round_to_beat (framepos_t frame, int dir);
- framepos_t round_to_beat_subdivision (framepos_t fr, int sub_num, int dir);
- framepos_t round_to_tick (framepos_t frame, int dir);
+ 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);
void set_length (framepos_t frames);
void change_initial_tempo (double bpm, double note_type);
void insert_time (framepos_t, framecnt_t);
+ bool remove_time (framepos_t where, framecnt_t amount); //returns true if anything was moved
int n_tempos () const;
int n_meters () const;
friend class ::BBTTest;
friend class ::FrameposPlusBeatsTest;
friend class ::TempoTest;
-
+
static Tempo _default_tempo;
static Meter _default_meter;
Metrics metrics;
framecnt_t _frame_rate;
mutable Glib::Threads::RWLock lock;
- BBTPointList _map;
void recompute_map (bool reassign_tempo_bbt, framepos_t end = -1);
- void extend_map (framepos_t end);
- void require_map_to (framepos_t pos);
- void require_map_to (const Timecode::BBT_Time&);
- void _extend_map (TempoSection* tempo, MeterSection* meter,
+
+ void _extend_map (TempoSection* tempo, MeterSection* meter,
Metrics::iterator next_metric,
- Timecode::BBT_Time current, framepos_t current_frame, framepos_t end);
-
- BBTPointList::const_iterator bbt_before_or_at (framepos_t);
- BBTPointList::const_iterator bbt_before_or_at (const Timecode::BBT_Time&);
- BBTPointList::const_iterator bbt_after_or_at (framepos_t);
-
- framepos_t round_to_type (framepos_t fr, int dir, BBTPointType);
- void bbt_time (framepos_t, Timecode::BBT_Time&, const BBTPointList::const_iterator&);
- framecnt_t bbt_duration_at_unlocked (const Timecode::BBT_Time& when, const Timecode::BBT_Time& bbt, int dir);
-
+ Timecode::BBT_Time current, framepos_t current_frame, framepos_t end);
+
+ framepos_t round_to_type (framepos_t fr, RoundMode dir, BBTPointType);
+
const MeterSection& first_meter() const;
+ MeterSection& first_meter();
const TempoSection& first_tempo() const;
-
+ TempoSection& first_tempo();
+
+ Timecode::BBT_Time beats_to_bbt (double beats);
+ int32_t bars_in_meter_section (MeterSection* ms) const;
+
void do_insert (MetricSection* section);
+
+ void add_tempo_locked (const Tempo&, Timecode::BBT_Time where, bool recompute, TempoSection::TempoSectionType type);
+ void add_meter_locked (const Meter&, Timecode::BBT_Time where, bool recompute);
+
+ bool remove_tempo_locked (const TempoSection&);
+ bool remove_meter_locked (const MeterSection&);
+
};
}; /* namespace ARDOUR */
projects / ardour.git / blobdiff