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Tempo ramps - add method to handle beat-based tempo reordering. clean code.

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This commit is contained in:
nick_m 2016-03-04 07:32:00 +11:00
parent aa95ffbc97
commit 989089a4e9
4 changed files with 90 additions and 100 deletions
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3
gtk2_ardour/editor_drag.cc
View File

@ -3329,10 +3329,9 @@ TempoMarkerDrag::motion (GdkEvent* event, bool first_move)
}
framepos_t const pf = adjusted_current_frame (event, false);
double const baf = _editor->session()->tempo_map().beat_at_frame (pf);
Tempo const tp = _marker->tempo();
_marker->set_position (pf);
_editor->session()->tempo_map().gui_move_tempo (_real_section, tp, pf, baf);
_editor->session()->tempo_map().gui_move_tempo (_real_section, tp, pf);
show_verbose_cursor_time (pf);
}

2
gtk2_ardour/editor_tempodisplay.cc
View File

@ -378,7 +378,7 @@ Editor::edit_tempo_section (TempoSection* section)
if (tempo_dialog.get_lock_style() == MusicTime) {
_session->tempo_map().replace_tempo (*section, Tempo (bpm, nt), beat, tempo_dialog.get_tempo_type());
} else {
framepos_t const f = _session->tempo_map().compute_replacement_tempo_section (section, bpm, beat);
framepos_t const f = _session->tempo_map().compute_new_tempo_frame (section, Tempo (bpm, nt), beat);
_session->tempo_map().replace_tempo (*section, Tempo (bpm, nt), f, tempo_dialog.get_tempo_type());
}
XMLNode &after = _session->tempo_map().get_state();

10
libs/ardour/ardour/tempo.h
View File

@ -375,14 +375,12 @@ class LIBARDOUR_API TempoMap : public PBD::StatefulDestructible
void remove_tempo (const TempoSection&, bool send_signal);
void remove_meter (const MeterSection&, bool send_signal);
framepos_t compute_replacement_tempo_section (TempoSection* section, const Tempo& bpm, const double& beat);
Metrics get_new_order (TempoSection* section, const Tempo& bpm, const framepos_t& frame, const double& beat);
Metrics get_new_order (MeterSection* section, const Meter& mt, const framepos_t& frame, const double& beat);
framepos_t compute_new_tempo_frame (TempoSection* section, const Tempo& bpm, const double& beat);
void replace_tempo (const TempoSection&, const Tempo&, const double& where, TempoSection::Type type);
void replace_tempo (const TempoSection&, const Tempo&, const framepos_t& frame, TempoSection::Type type);
void gui_move_tempo (TempoSection*, const Tempo& bpm, const framepos_t& where, const double& beat);
void gui_move_tempo (TempoSection*, const Tempo& bpm, const framepos_t& where);
void gui_move_meter (MeterSection*, const Meter& mt, const framepos_t& where, const double& beat);
void replace_meter (const MeterSection&, const Meter&, const Timecode::BBT_Time& where);
@ -434,6 +432,10 @@ private:
framecnt_t frame_at_tick_locked (double tick) const;
framepos_t frame_time_locked (const Timecode::BBT_Time&);
Metrics get_new_order (TempoSection* section, const Tempo& bpm, const framepos_t& frame);
Metrics get_new_order (TempoSection* section, const Tempo& bpm, const double& beat);
Metrics get_new_order (MeterSection* section, const Meter& mt, const framepos_t& frame, const double& beat);
friend class ::BBTTest;
friend class ::FrameposPlusBeatsTest;
friend class ::TempoTest;

175
libs/ardour/tempo.cc
View File

@ -867,89 +867,6 @@ TempoMap::do_insert (MetricSection* section)
}
}
/**
* This is for a gui that needs to know the frame of a beat if a tempo section were to be moved or altered.
* It actually alters tha ramps up to the beat parameter, so calling this commits you to replacing the section immediately.
* It will not emit a signal or recompute the map, as you probably want to replace the tempo or do somethig else before that happens.
* @param section - the section you want to alter
* @param bpm - the new tempo
* @param beat - the beat where the altered tempo will fall
* @return returns - the position in frames where the new tempo section will lie
*/
framepos_t
TempoMap::compute_replacement_tempo_section (TempoSection* section, const Tempo& bpm, const double& beat)
{
Glib::Threads::RWLock::WriterLock lm (lock);
TempoSection* prev_ts = 0;
TempoSection* t;
framepos_t ret = 0;
MetricSectionSorter cmp;
for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
if (section->beat() == t->beat()) {
continue;
}
if (t->beat() > beat){
prev_ts->set_c_func_from_tempo_and_beat (bpm.beats_per_minute(), beat, _frame_rate);
section->set_beat (beat);
section->set_frame (prev_ts->frame_at_beat (beat, _frame_rate));
break;
}
if (t->position_lock_style() == MusicTime) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat(), _frame_rate);
t->set_frame (prev_ts->frame_at_beat (t->beat(), _frame_rate));
} else {
prev_ts->set_c_func (prev_ts->compute_c_func (t->beats_per_minute(), t->frame(), _frame_rate));
t->set_beat (prev_ts->beat_at_frame (t->frame(), _frame_rate));
}
}
prev_ts = t;
}
}
/* now we do the whole thing again because audio-locked sections will have caused a re-order */
prev_ts = 0;
metrics.sort (cmp);
for (Metrics::iterator i = metrics.begin(); i != metrics.end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
if (section->beat() == t->beat()) {
continue;
}
if (t->beat() > beat){
prev_ts->set_c_func_from_tempo_and_beat (bpm.beats_per_minute(), beat, _frame_rate);
ret = prev_ts->frame_at_beat (beat, _frame_rate);
section->set_frame (ret);
prev_ts = section;
break;
}
if (t->position_lock_style() == MusicTime) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat(), _frame_rate);
t->set_frame (prev_ts->frame_at_beat (t->beat(), _frame_rate));
} else {
prev_ts->set_c_func (prev_ts->compute_c_func (t->beats_per_minute(), t->frame(), _frame_rate));
t->set_beat (prev_ts->beat_at_frame (t->frame(), _frame_rate));
}
}
prev_ts = t;
}
}
if (!ret) {
prev_ts->set_c_func_from_tempo_and_beat (bpm.beats_per_minute(), beat, _frame_rate);
section->set_beat (beat);
section->set_frame (prev_ts->frame_at_beat (beat, _frame_rate));
ret = prev_ts->frame_at_beat (beat, _frame_rate);
}
return ret;
}
void
TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const double& where, TempoSection::Type type)
{
@ -995,7 +912,7 @@ TempoMap::replace_tempo (const TempoSection& ts, const Tempo& tempo, const frame
}
Metrics
TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const framepos_t& frame, const double& beat)
TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const framepos_t& frame)
{
Metrics imaginary (metrics);
@ -1007,25 +924,22 @@ TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const framepos
MetricSectionFrameSorter fcmp;
imaginary.sort (fcmp);
/* recompute */
/* recompute tempos */
for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
if (t == section) {
/* we have already set the frame - set the beat */
prev_ts->set_c_func (prev_ts->compute_c_func (bpm.beats_per_minute(), frame, _frame_rate));
//section->set_beat (prev_ts->beat_at_frame (frame, _frame_rate));
section->set_beat (prev_ts->beat_at_tempo (bpm.beats_per_minute(), frame, _frame_rate));
prev_ts = t;
continue;
}
if (t->position_lock_style() == MusicTime) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat(), _frame_rate);
//t->set_frame (prev_ts->frame_at_beat (t->beat(), _frame_rate));
t->set_frame (prev_ts->frame_at_tempo (t->beats_per_minute(), t->beat(), _frame_rate));
} else {
prev_ts->set_c_func (prev_ts->compute_c_func (t->beats_per_minute(), t->frame(), _frame_rate));
//t->set_beat (prev_ts->beat_at_frame (t->frame(), _frame_rate));
t->set_beat (prev_ts->beat_at_tempo (t->beats_per_minute(), t->frame(), _frame_rate));
}
}
@ -1034,7 +948,6 @@ TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const framepos
}
MetricSectionSorter cmp;
imaginary.sort (cmp);
/* to do - check precision using _at_tempo() methods */
/*
prev_ts = 0;
std::cerr << "dumping imaginary order ------" << std::endl;;
@ -1044,7 +957,66 @@ TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const framepos
std::cerr << t->beats_per_minute() << " | " << t->beat() << " | " << t->frame() << std::endl;
std::cerr << prev_ts->beats_per_minute() << " | " << prev_ts->beat() << " | " << prev_ts->frame() << std::endl;
std::cerr << t->beats_per_minute() << " | " << prev_ts->beat_at_tempo (t->beats_per_minute()) << " | " << prev_ts->tempo_at_beat(t->beat()) << " | " << prev_ts->frame_at_tempo(t->beats_per_minute(), _frame_rate) << std::endl;
std::cerr << t->beats_per_minute() << " | " << prev_ts->beat_at_tempo (t->beats_per_minute(), t->frame, _frame_rate) << " | " << prev_ts->tempo_at_beat(t->beat()) << " | " << prev_ts->frame_at_tempo(t->beats_per_minute(), t->beat(), _frame_rate) << std::endl;
std::cerr << " ------" << std::endl;;
}
prev_ts = t;
}
}
std::cerr << "end dump ------";
*/
return imaginary;
}
Metrics
TempoMap::get_new_order (TempoSection* section, const Tempo& bpm, const double& beat)
{
Metrics imaginary (metrics);
TempoSection* prev_ts = 0;
TempoSection* t;
/*set beat and sort */
section->set_beat (beat);
MetricSectionSorter cmp;
imaginary.sort (cmp);
/* recompute tempo positions */
for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
if (t == section) {
/* we've already set the beat - set the frame */
prev_ts->set_c_func_from_tempo_and_beat (bpm.beats_per_minute(), beat, _frame_rate);
section->set_frame (prev_ts->frame_at_tempo (bpm.beats_per_minute(), beat, _frame_rate));
prev_ts = t;
continue;
}
if (t->position_lock_style() == MusicTime) {
prev_ts->set_c_func_from_tempo_and_beat (t->beats_per_minute(), t->beat(), _frame_rate);
t->set_frame (prev_ts->frame_at_tempo (t->beats_per_minute(), t->beat(), _frame_rate));
} else {
prev_ts->set_c_func (prev_ts->compute_c_func (t->beats_per_minute(), t->frame(), _frame_rate));
t->set_beat (prev_ts->beat_at_tempo (t->beats_per_minute(), t->frame(), _frame_rate));
}
}
prev_ts = t;
}
}
MetricSectionFrameSorter fcmp;
imaginary.sort (fcmp);
/*
prev_ts = 0;
std::cerr << "dumping imaginary order ------" << std::endl;;
for (Metrics::iterator i = imaginary.begin(); i != imaginary.end(); ++i) {
if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
if (prev_ts) {
std::cerr << t->beats_per_minute() << " | " << t->beat() << " | " << t->frame() << std::endl;
std::cerr << "prev : " << prev_ts->beats_per_minute() << " | " << prev_ts->beat() << " | " << prev_ts->frame() << std::endl;
std::cerr << "calculated : " << t->beats_per_minute() << " | " << prev_ts->beat_at_tempo (t->beats_per_minute(), t->frame(), _frame_rate) << " | " << prev_ts->tempo_at_beat(t->beat()) << " | " << prev_ts->frame_at_tempo(t->beats_per_minute(), t->frame(), _frame_rate) << std::endl;
std::cerr << " ------" << std::endl;;
}
@ -1127,12 +1099,30 @@ TempoMap::get_new_order(MeterSection* section, const Meter& mt, const framepos_t
return imaginary;
}
/**
* This is for a gui that needs to know the frame of a beat if a tempo section were to be moved or altered.
* It actually reorders and partially recomputes tha ramps, so calling this commits you to replacing the section immediately.
* It will not emit a signal as you probably want to replace the tempo or do somethig else before that happens.
* @param section - the section you want to alter
* @param bpm - the new tempo
* @param beat - the beat where the altered tempo will fall
* @return returns - the position in frames where the new tempo section will lie.
*/
framepos_t
TempoMap::compute_new_tempo_frame (TempoSection* section, const Tempo& bpm, const double& beat)
{
Glib::Threads::RWLock::WriterLock lm (lock);
Metrics new_order = get_new_order (section, bpm, beat);
return section->frame();
}
void
TempoMap::gui_move_tempo (TempoSection* ts, const Tempo& bpm, const framepos_t& frame, const double& beat_where)
TempoMap::gui_move_tempo (TempoSection* ts, const Tempo& bpm, const framepos_t& frame)
{
{
Glib::Threads::RWLock::WriterLock lm (lock);
Metrics new_order = get_new_order (ts, bpm, frame, beat_where);
Metrics new_order = get_new_order (ts, bpm, frame);
metrics.clear();
metrics = new_order;
@ -1157,7 +1147,6 @@ TempoMap::add_tempo (const Tempo& tempo, double where, ARDOUR::TempoSection::Typ
add_tempo_locked (tempo, where, true, type);
}
PropertyChanged (PropertyChange ());
}