X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2Ftempo.h;h=f0a63be05ffa22ed624ddf18c05e3b846e671dfa;hb=2858b0474e4bedf3ab67a539a7f0d12380ac7bda;hp=843437dab7af61124aaeba398b16203e3a1c9773;hpb=3845af6ce92ef15637ffb09410f442e7b4a104c3;p=ardour.git diff --git a/libs/ardour/ardour/tempo.h b/libs/ardour/ardour/tempo.h index 843437dab7..f0a63be05f 100644 --- a/libs/ardour/ardour/tempo.h +++ b/libs/ardour/ardour/tempo.h @@ -1,5 +1,5 @@ /* - Copyright (C) 2000 Paul Davis + Copyright (C) 2000 Paul Davis This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -27,25 +27,32 @@ #include #include "pbd/undo.h" -#include "pbd/stateful.h" -#include "pbd/statefuldestructible.h" +#include "pbd/stateful.h" +#include "pbd/statefuldestructible.h" -#include +#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 - : _beats_per_minute (bpm), _note_type(type) {} + : _beats_per_minute (bpm), _note_type(type) {} double beats_per_minute () const { return _beats_per_minute;} double note_type () const { return _note_type;} - double frames_per_beat (nframes_t sr, const Meter& meter) const; + double frames_per_beat (framecnt_t sr) const; protected: double _beats_per_minute; @@ -54,24 +61,23 @@ class Tempo { class Meter { public: - static const double ticks_per_beat; + Meter (double dpb, double bt) + : _divisions_per_bar (dpb), _note_type (bt) {} - Meter (double bpb, double bt) - : _beats_per_bar (bpb), _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&, nframes_t sr) const; + + double frames_per_bar (const Tempo&, framecnt_t sr) const; + double frames_per_division (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; @@ -79,24 +85,24 @@ class Meter { class MetricSection { public: - MetricSection (const BBT_Time& start) + MetricSection (const Timecode::BBT_Time& start) : _start (start), _frame (0), _movable (true) {} - MetricSection (nframes_t start) + MetricSection (framepos_t start) : _frame (start), _movable (true) {} virtual ~MetricSection() {} - const BBT_Time& start() const { return _start; } - nframes_t frame() const { return _frame; } + const Timecode::BBT_Time& start() const { return _start; } + framepos_t frame() const { return _frame; } void set_movable (bool yn) { _movable = yn; } bool movable() const { return _movable; } - virtual void set_frame (nframes_t f) { + virtual void set_frame (framepos_t f) { _frame = f; } - virtual void set_start (const BBT_Time& w) { + virtual void set_start (const Timecode::BBT_Time& w) { _start = w; } @@ -106,17 +112,21 @@ class MetricSection { */ virtual XMLNode& get_state() const = 0; + int compare (const MetricSection&) const; + bool operator== (const MetricSection& other) const; + bool operator!= (const MetricSection& other) const; + private: - BBT_Time _start; - nframes_t _frame; - bool _movable; + Timecode::BBT_Time _start; + framepos_t _frame; + bool _movable; }; class MeterSection : public MetricSection, public Meter { public: - MeterSection (const BBT_Time& start, double bpb, double note_type) + MeterSection (const Timecode::BBT_Time& start, double bpb, double note_type) : MetricSection (start), Meter (bpb, note_type) {} - MeterSection (nframes_t start, double bpb, double note_type) + MeterSection (framepos_t start, double bpb, double note_type) : MetricSection (start), Meter (bpb, note_type) {} MeterSection (const XMLNode&); @@ -127,23 +137,62 @@ class MeterSection : public MetricSection, public Meter { class TempoSection : public MetricSection, public Tempo { public: - TempoSection (const BBT_Time& start, double qpm, double note_type) - : MetricSection (start), Tempo (qpm, note_type) {} - TempoSection (nframes_t start, double qpm, double note_type) - : MetricSection (start), Tempo (qpm, note_type) {} + 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) {} 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 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. +*/ +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; + framepos_t _frame; + Timecode::BBT_Time _start; +}; + class TempoMap : public PBD::StatefulDestructible { public: - TempoMap (nframes_t frame_rate); + TempoMap (framecnt_t frame_rate); ~TempoMap(); /* measure-based stuff */ @@ -154,137 +203,135 @@ class TempoMap : public PBD::StatefulDestructible }; struct BBTPoint { - BBTPointType type; - nframes_t frame; - const Meter* meter; - const Tempo* tempo; - uint32_t bar; - uint32_t beat; - - BBTPoint (const Meter& m, const Tempo& t, nframes_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 Meter* meter; + const Tempo* tempo; + uint32_t bar; + uint32_t beat; + + 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 Meter& m, const Tempo& t, framepos_t f, + uint32_t b, uint32_t e) + : frame (f), meter (&m), tempo (&t), bar (b), beat (e) {} }; typedef std::vector BBTPointList; - + template void apply_with_metrics (T& obj, void (T::*method)(const Metrics&)) { - Glib::RWLock::ReaderLock lm (lock); + Glib::RWLock::ReaderLock lm (metrics_lock); (obj.*method)(*metrics); } - BBTPointList *get_points (nframes_t start, nframes_t end) const; - - void bbt_time (nframes_t when, BBT_Time&) const; - nframes_t frame_time (const BBT_Time&) const; - nframes_t bbt_duration_at (nframes_t, const BBT_Time&, int dir) const; + void map (BBTPointList::const_iterator&, BBTPointList::const_iterator&, + framepos_t start, framepos_t end); + + void bbt_time (framepos_t when, Timecode::BBT_Time&); + framecnt_t frame_time (const Timecode::BBT_Time&); + framecnt_t bbt_duration_at (framepos_t, const Timecode::BBT_Time&, int dir); static const Tempo& default_tempo() { return _default_tempo; } static const Meter& default_meter() { return _default_meter; } - const Tempo& tempo_at (nframes_t); - const Meter& meter_at (nframes_t); - - const TempoSection& tempo_section_at (nframes_t); + const Tempo& tempo_at (framepos_t) const; + const Meter& meter_at (framepos_t) const; - void add_tempo(const Tempo&, BBT_Time where); - void add_meter(const Meter&, BBT_Time where); + const TempoSection& tempo_section_at (framepos_t) const; - void add_tempo(const Tempo&, nframes_t where); - void add_meter(const Meter&, nframes_t where); + void add_tempo(const Tempo&, Timecode::BBT_Time where); + void add_meter(const Meter&, Timecode::BBT_Time where); - void move_tempo (TempoSection&, const BBT_Time& to); - void move_meter (MeterSection&, const 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); - nframes_t round_to_bar (nframes_t frame, int dir); - nframes_t round_to_beat (nframes_t frame, int dir); - nframes_t round_to_beat_subdivision (nframes_t fr, int sub_num, int dir); - nframes_t round_to_tick (nframes_t frame, int dir); + 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); - void set_length (nframes_t frames); + void set_length (framepos_t frames); XMLNode& get_state (void); - int set_state (const XMLNode&); + int set_state (const XMLNode&, int version); void dump (std::ostream&) const; void clear (); - /** 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. - */ - class Metric { - public: - Metric (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 (nframes_t f) { _frame = f; } - void set_start (const BBT_Time& t) { _start = t; } - - const Meter& meter() const { return *_meter; } - const Tempo& tempo() const { return *_tempo; } - nframes_t frame() const { return _frame; } - const BBT_Time& start() const { return _start; } - - private: - const Meter* _meter; - const Tempo* _tempo; - nframes_t _frame; - BBT_Time _start; - }; + TempoMetric metric_at (Timecode::BBT_Time bbt) const; + TempoMetric metric_at (framepos_t) const; - Metric metric_at (BBT_Time bbt) const; - Metric metric_at (nframes_t) const; - void bbt_time_with_metric (nframes_t, BBT_Time&, const Metric&) const; + framepos_t framepos_plus_bbt (framepos_t pos, Timecode::BBT_Time b); + framepos_t framepos_plus_beats (framepos_t, Evoral::MusicalTime); + framepos_t framepos_minus_bbt (framepos_t pos, Timecode::BBT_Time b); + framepos_t framepos_minus_beats (framepos_t, Evoral::MusicalTime); + Evoral::MusicalTime framewalk_to_beats (framepos_t pos, framecnt_t distance); - void change_existing_tempo_at (nframes_t, double bpm, double note_type); + void change_existing_tempo_at (framepos_t, double bpm, double note_type); void change_initial_tempo (double bpm, double note_type); - void insert_time (nframes_t, nframes_t); + void insert_time (framepos_t, framecnt_t); int n_tempos () const; int n_meters () const; - sigc::signal StateChanged; + 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; - nframes_t _frame_rate; - nframes_t last_bbt_when; + framecnt_t _frame_rate; + framepos_t last_bbt_when; bool last_bbt_valid; - BBT_Time last_bbt; - mutable Glib::RWLock lock; + Timecode::BBT_Time last_bbt; + mutable Glib::RWLock metrics_lock; + mutable Glib::RWLock map_lock; + BBTPointList* _map; + + void recompute_map (bool reassign_tempo_bbt, framepos_t end = -1); + void require_map_to (framepos_t pos); + void require_map_to (const Timecode::BBT_Time&); + + BBTPointList::const_iterator bbt_before_or_at (framepos_t); + BBTPointList::const_iterator bbt_after_or_at (framepos_t); + BBTPointList::const_iterator bbt_point_for (const Timecode::BBT_Time&); + + void timestamp_metrics_from_audio_time (); + + framepos_t round_to_type (framepos_t fr, int dir, BBTPointType); + + void bbt_time_unlocked (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); - void timestamp_metrics (bool use_bbt); - - nframes_t round_to_type (nframes_t fr, int dir, BBTPointType); - - nframes_t frame_time_unlocked (const BBT_Time&) const; - - void bbt_time_unlocked (nframes_t, BBT_Time&) const; - - nframes_t bbt_duration_at_unlocked (const BBT_Time& when, const BBT_Time& bbt, int dir) const; - const MeterSection& first_meter() const; const TempoSection& first_tempo() const; - - nframes_t count_frames_between (const BBT_Time&, const BBT_Time&) const; - nframes_t count_frames_between_metrics (const Meter&, const Tempo&, - const BBT_Time&, const BBT_Time&) const; - - int move_metric_section (MetricSection&, const BBT_Time& to); - void do_insert (MetricSection* section, bool with_bbt); + + int move_metric_section (MetricSection&, const Timecode::BBT_Time& to); + void do_insert (MetricSection* section); + + 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; }; }; /* 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__ */