#include "pbd/stateful.h"
#include "pbd/statefuldestructible.h"
+#include "evoral/types.hpp"
#include "ardour/ardour.h"
class XMLNode;
+class BBTTest;
+class FrameposPlusBeatsTest;
+class TempoTest;
+
namespace ARDOUR {
+
class Meter;
+class TempoMap;
+
class Tempo {
public:
Tempo (double bpm, double type=4.0) // defaulting to quarter note
double beats_per_minute () const { return _beats_per_minute;}
double note_type () const { return _note_type;}
- double frames_per_beat (framecnt_t sr, const Meter& meter) const;
+ double frames_per_beat (framecnt_t sr) const;
protected:
double _beats_per_minute;
class Meter {
public:
- Meter (double bpb, double bt)
- : _beats_per_bar (bpb), _note_type (bt) {}
+ Meter (double dpb, double bt)
+ : _divisions_per_bar (dpb), _note_type (bt) {}
- double beats_per_bar () const { return _beats_per_bar; }
+ double divisions_per_bar () const { return _divisions_per_bar; }
double note_divisor() const { return _note_type; }
double frames_per_bar (const Tempo&, framecnt_t sr) const;
+ double frames_per_grid (const Tempo&, framecnt_t sr) const;
protected:
- /** The number of beats in a bar. This is a real value because
+ /** The number of divisions in a bar. This is a floating point value because
there are musical traditions on our planet that do not limit
themselves to integral numbers of beats per bar.
*/
- double _beats_per_bar;
+ double _divisions_per_bar;
- /** The type of "note" that a beat represents. For example, 4.0 is
+ /** The type of "note" that a division represents. For example, 4.0 is
a quarter (crotchet) note, 8.0 is an eighth (quaver) note, etc.
*/
double _note_type;
*/
virtual XMLNode& get_state() const = 0;
- int compare (MetricSection *, bool) const;
-
private:
Timecode::BBT_Time _start;
framepos_t _frame;
class TempoSection : public MetricSection, public Tempo {
public:
TempoSection (const Timecode::BBT_Time& start, double qpm, double note_type)
- : MetricSection (start), Tempo (qpm, 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) {}
+ : MetricSection (start), Tempo (qpm, note_type), _bar_offset (-1.0) {}
TempoSection (const XMLNode&);
static const std::string xml_state_node_name;
XMLNode& get_state() const;
+
+ void update_bar_offset_from_bbt (const Meter&);
+ void update_bbt_time_from_bar_offset (const Meter&);
+ double bar_offset() const { return _bar_offset; }
+
+ private:
+ /* 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;
};
typedef std::list<MetricSection*> Metrics;
class TempoMetric {
public:
TempoMetric (const Meter& m, const Tempo& t) : _meter (&m), _tempo (&t), _frame (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_start (const Timecode::BBT_Time& t) { _start = t; }
-
+
const Meter& meter() const { return *_meter; }
const Tempo& tempo() const { return *_tempo; }
framepos_t frame() const { return _frame; }
const Timecode::BBT_Time& start() const { return _start; }
-
+
private:
const Meter* _meter;
const Tempo* _tempo;
};
struct BBTPoint {
- BBTPointType type;
- framepos_t frame;
- const Meter* meter;
- const Tempo* tempo;
- uint32_t bar;
- uint32_t beat;
-
- BBTPoint (const Meter& m, const Tempo& t, framepos_t f,
- BBTPointType ty, uint32_t b, uint32_t e)
- : type (ty), frame (f), meter (&m), tempo (&t), bar (b), beat (e) {}
+ framepos_t frame;
+ const MeterSection* meter;
+ const TempoSection* tempo;
+ uint32_t bar;
+ uint32_t beat;
+
+ BBTPoint (const MeterSection& m, const TempoSection& 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::RWLock::ReaderLock lm (lock);
- (obj.*method)(*metrics);
+ (obj.*method)(metrics);
}
- BBTPointList *get_points (framepos_t start, framepos_t end) const;
+ void get_grid (BBTPointList::const_iterator&, BBTPointList::const_iterator&,
+ framepos_t start, framepos_t end);
+
+ /* TEMPO- AND METER-SENSITIVE FUNCTIONS
+
+ bbt_time(), bbt_time_rt(), 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
+ 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&);
+ 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
+ whose location is canonically defined in beats.
+ */
- void bbt_time (framepos_t when, Timecode::BBT_Time&) const;
- framecnt_t frame_time (const Timecode::BBT_Time&) const;
- framecnt_t bbt_duration_at (framepos_t, const Timecode::BBT_Time&, int dir) const;
+ 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;
static const Tempo& default_tempo() { return _default_tempo; }
static const Meter& default_meter() { return _default_meter; }
void add_tempo(const Tempo&, Timecode::BBT_Time where);
void add_meter(const Meter&, Timecode::BBT_Time where);
- void add_tempo(const Tempo&, framepos_t where);
- void add_meter(const Meter&, framepos_t where);
-
- void move_tempo (TempoSection&, const Timecode::BBT_Time& to);
- void move_meter (MeterSection&, const Timecode::BBT_Time& to);
-
- void remove_tempo(const TempoSection&);
- void remove_meter(const MeterSection&);
+ void remove_tempo(const TempoSection&, bool send_signal);
+ void remove_meter(const MeterSection&, bool send_signal);
- void replace_tempo (TempoSection& existing, const Tempo& replacement);
- void replace_meter (MeterSection& existing, const Meter& replacement);
+ void replace_tempo (const TempoSection&, const Tempo&, const Timecode::BBT_Time& where);
+ 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);
TempoMetric metric_at (Timecode::BBT_Time bbt) const;
TempoMetric metric_at (framepos_t) const;
- void bbt_time_with_metric (framepos_t, Timecode::BBT_Time&, const TempoMetric&) const;
- Timecode::BBT_Time bbt_add (const Timecode::BBT_Time&, const Timecode::BBT_Time&, const TempoMetric&) const;
- Timecode::BBT_Time bbt_add (const Timecode::BBT_Time& a, const Timecode::BBT_Time& b) const;
- Timecode::BBT_Time bbt_subtract (const Timecode::BBT_Time&, const Timecode::BBT_Time&) const;
-
- framepos_t framepos_plus_bbt (framepos_t pos, Timecode::BBT_Time b) const;
- double framewalk_to_beats (framepos_t pos, framecnt_t distance) const;
void change_existing_tempo_at (framepos_t, double bpm, double note_type);
void change_initial_tempo (double bpm, double note_type);
framecnt_t frame_rate () const { return _frame_rate; }
private:
+
+ friend class ::BBTTest;
+ friend class ::FrameposPlusBeatsTest;
+ friend class ::TempoTest;
+
static Tempo _default_tempo;
static Meter _default_meter;
- Metrics* metrics;
- framecnt_t _frame_rate;
- framepos_t last_bbt_when;
- bool last_bbt_valid;
- Timecode::BBT_Time last_bbt;
+ Metrics metrics;
+ framecnt_t _frame_rate;
mutable Glib::RWLock lock;
-
- void timestamp_metrics (bool use_bbt);
-
+ 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,
+ 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);
-
- framepos_t frame_time_unlocked (const Timecode::BBT_Time&) const;
-
- void bbt_time_unlocked (framepos_t, Timecode::BBT_Time&) const;
-
- framecnt_t bbt_duration_at_unlocked (const Timecode::BBT_Time& when, const Timecode::BBT_Time& bbt, int dir) const;
-
+ 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);
+
const MeterSection& first_meter() const;
const TempoSection& first_tempo() const;
-
- framecnt_t count_frames_between (const Timecode::BBT_Time&, const Timecode::BBT_Time&) const;
- framecnt_t count_frames_between_metrics (const Meter&, const Tempo&,
- const Timecode::BBT_Time&, const Timecode::BBT_Time&) const;
-
- int move_metric_section (MetricSection&, const Timecode::BBT_Time& to);
- void do_insert (MetricSection* section, bool with_bbt);
+
+ void do_insert (MetricSection* section);
};
}; /* namespace ARDOUR */
+std::ostream& operator<< (std::ostream&, const ARDOUR::Meter&);
+std::ostream& operator<< (std::ostream&, const ARDOUR::Tempo&);
+std::ostream& operator<< (std::ostream&, const ARDOUR::MetricSection&);
+
#endif /* __ardour_tempo_h__ */
projects / ardour.git / blobdiff