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-rw-r--r--libs/ardour/ardour/tempo.h95
1 files changed, 65 insertions, 30 deletions
diff --git a/libs/ardour/ardour/tempo.h b/libs/ardour/ardour/tempo.h
index 1b43ff8c8c..9741d34adb 100644
--- a/libs/ardour/ardour/tempo.h
+++ b/libs/ardour/ardour/tempo.h
@@ -55,6 +55,7 @@ class LIBARDOUR_API Tempo {
: _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
@@ -146,10 +147,15 @@ class LIBARDOUR_API MeterSection : public MetricSection, public Meter {
/** 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;
@@ -160,7 +166,41 @@ class LIBARDOUR_API TempoSection : public MetricSection, public Tempo {
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
@@ -170,6 +210,7 @@ class LIBARDOUR_API TempoSection : public MetricSection, public Tempo {
position within the bar if/when the meter changes.
*/
double _bar_offset;
+ TempoSectionType _type;
};
typedef std::list<MetricSection*> Metrics;
@@ -231,11 +272,11 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
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) {}
@@ -245,19 +286,18 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
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()
+ 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.
@@ -267,11 +307,12 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
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);
@@ -293,19 +334,19 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
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;
const Meter& meter_at (framepos_t) const;
const TempoSection& tempo_section_at (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, RoundMode dir);
@@ -352,32 +393,26 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
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,
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);
+ Timecode::BBT_Time current, framepos_t current_frame, framepos_t end);
framepos_t round_to_type (framepos_t fr, RoundMode 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);
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);
+ 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&);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-22 15:15:18 +0000