#include <string>
#include <vector>
#include <cmath>
-#include <glibmm/thread.h>
+#include <glibmm/threads.h>
#include "pbd/undo.h"
#include "pbd/stateful.h"
#include "ardour/ardour.h"
-class XMLNode;
-
class BBTTest;
class FrameposPlusBeatsTest;
class TempoTest;
+class XMLNode;
namespace ARDOUR {
class Meter;
class TempoMap;
+/** Tempo, the speed at which musical time progresses (BPM). */
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;
+ double frames_per_beat (framecnt_t sr) const {
+ return (60.0 * sr) / _beats_per_minute;
+ }
protected:
double _beats_per_minute;
double _note_type;
};
+/** Meter, or time signature (beats per bar, and which note type is a beat). */
class Meter {
public:
Meter (double dpb, double bt)
double _note_type;
};
+/** A section of timeline with a certain Tempo or Meter. */
class MetricSection {
public:
MetricSection (const Timecode::BBT_Time& start)
bool _movable;
};
+/** A section of timeline with a certain Meter. */
class MeterSection : public MetricSection, public Meter {
public:
MeterSection (const Timecode::BBT_Time& start, double bpb, double note_type)
XMLNode& get_state() const;
};
+/** A section of timeline with a certain Tempo. */
class TempoSection : public MetricSection, public Tempo {
public:
TempoSection (const Timecode::BBT_Time& start, double qpm, double note_type)
typedef std::list<MetricSection*> Metrics;
-/** Helper class that we use to be able to keep track of which
- meter *AND* tempo are in effect at a given point in time.
+/** Helper class to keep track of the Meter *AND* Tempo in effect
+ at a given point in time.
*/
class TempoMetric {
public:
- TempoMetric (const Meter& m, const Tempo& t) : _meter (&m), _tempo (&t), _frame (0) {}
+ 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_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; }
+ void set_metric (const MetricSection* section) {
+ const MeterSection* meter;
+ const TempoSection* tempo;
+ if ((meter = dynamic_cast<const MeterSection*>(section))) {
+ set_meter(*meter);
+ } else if ((tempo = dynamic_cast<const TempoSection*>(section))) {
+ set_tempo(*tempo);
+ }
+
+ set_frame(section->frame());
+ set_start(section->start());
+ }
+
+ 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:
};
struct BBTPoint {
- framepos_t frame;
- const MeterSection* meter;
- const TempoSection* tempo;
- uint32_t bar;
- uint32_t beat;
+ 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; }
+ 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);
+ Glib::Threads::RWLock::ReaderLock lm (lock);
(obj.*method)(metrics);
}
void get_grid (BBTPointList::const_iterator&, BBTPointList::const_iterator&,
- framepos_t start, framepos_t end);
+ framepos_t start, framepos_t end);
/* TEMPO- AND METER-SENSITIVE FUNCTIONS
whose location is canonically defined in beats.
*/
- void bbt_time (framepos_t when, Timecode::BBT_Time&);
+ 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&);
+ framepos_t frame_time (const Timecode::BBT_Time&);
framecnt_t bbt_duration_at (framepos_t, const Timecode::BBT_Time&, int dir);
/* TEMPO-SENSITIVE FUNCTIONS
const TempoSection& tempo_section_at (framepos_t) const;
- void add_tempo(const Tempo&, Timecode::BBT_Time where);
- void add_meter(const Meter&, Timecode::BBT_Time where);
+ void add_tempo (const Tempo&, Timecode::BBT_Time where);
+ 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 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_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where);
void clear ();
TempoMetric metric_at (Timecode::BBT_Time bbt) const;
- TempoMetric metric_at (framepos_t) const;
+ /** Return the TempoMetric at frame @p t, and point @p last to the latest
+ * metric change <= t, if it is non-NULL.
+ */
+ TempoMetric metric_at (framepos_t, Metrics::const_iterator* last=NULL) const;
+
+ Metrics::const_iterator metrics_end() { return metrics.end(); }
void change_existing_tempo_at (framepos_t, double bpm, double note_type);
void change_initial_tempo (double bpm, double note_type);
static Tempo _default_tempo;
static Meter _default_meter;
- Metrics metrics;
- framecnt_t _frame_rate;
- mutable Glib::RWLock lock;
- BBTPointList _map;
+ 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 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);
+ 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&);
+ 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;
projects / ardour.git / blobdiff