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-rw-r--r--libs/ardour/tempo.cc148
1 files changed, 27 insertions, 121 deletions
diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index e3d25948de..b4982ebe2b 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -2783,118 +2783,16 @@ TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
}
void
-TempoMap::gui_dilate_next_tempo (const framepos_t& frame, const framepos_t& end_frame)
-{
- Metrics future_map;
- TempoSection* ts = 0;
-
- {
- Glib::Threads::RWLock::WriterLock lm (lock);
-
- for (Metrics::iterator i = _metrics.begin(); i != _metrics.end(); ++i) {
- TempoSection* t = 0;
- if ((t = dynamic_cast<TempoSection*> (*i)) != 0) {
- if (t->frame() > end_frame) {
- ts = t;
- break;
- }
- }
- }
-
- if (!ts) {
- ts = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
- }
-
- TempoSection* next_t = copy_metrics_and_point (_metrics, future_map, ts);
- TempoSection* prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, next_t->frame() - 1));
- TempoSection* prev_to_prev_t = 0;
- const frameoffset_t fr_off = end_frame - frame;
-
- if (prev_t && prev_t->pulse() > 0.0) {
- prev_to_prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (future_map, prev_t->frame() - 1));
- }
-
-
- /* the change in frames is the result of changing the slope of at most 2 previous tempo sections.
- constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
- */
- double contribution = 0.0;
-
- if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
- contribution = prev_t->beats_per_minute() / (prev_t->beats_per_minute() + next_t->beats_per_minute());
- }
-
- frameoffset_t prev_t_frame_contribution = fr_off;
-
- const double start_tempo = prev_t->tempo_at_frame (frame, _frame_rate);
- const double end_tempo = prev_t->tempo_at_frame (frame + prev_t_frame_contribution, _frame_rate);
- const double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
- const double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
- double new_bpm;
-
- if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
-
- if (prev_t->position_lock_style() == MusicTime) {
- if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
- / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
-
- } else {
- /* prev to prev is irrelevant */
-
- if (start_pulse != prev_t->pulse()) {
- new_bpm = prev_t->beats_per_minute() * ((start_pulse - prev_t->pulse()) / (end_pulse - prev_t->pulse()));
- } else {
- new_bpm = prev_t->beats_per_minute();
- }
- }
- } else {
- /* AudioTime */
- if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
- / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
- } else {
- /* prev_to_prev_t is irrelevant */
-
- if (end_frame != prev_t->frame()) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame()) / (double) (end_frame - prev_t->frame()));
- } else {
- new_bpm = prev_t->beats_per_minute();
- }
- }
- }
- } else {
- const double end_minute = ((next_t->frame() + prev_t_frame_contribution - prev_t->frame()) / (double) _frame_rate) / 60.0;
- const double pulse_delta_at_next = prev_t->pulse_at_frame ((next_t->frame()) + prev_t_frame_contribution, _frame_rate) - next_t->pulse();
- const double target_pulse = (next_t->pulse() - prev_t->pulse()) + (pulse_delta_at_next);
-
- new_bpm = (prev_t->tempo_at_frame (next_t->frame() - prev_t_frame_contribution, _frame_rate)) * (double) prev_t->note_type();
-
- }
-
- next_t->set_beats_per_minute (new_bpm);
- recompute_tempos (future_map);
- recompute_meters (future_map);
-
- if (check_solved (future_map, true)) {
- ts->set_beats_per_minute (new_bpm);
- recompute_tempos (_metrics);
- recompute_meters (_metrics);
- }
- }
-
- Metrics::const_iterator d = future_map.begin();
- while (d != future_map.end()) {
- delete (*d);
- ++d;
- }
-
- MetricPositionChanged (); // Emit Signal
-}
+TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame, const double& pulse)
+{
+ /*
+ Ts (future prev_t) Tnext
+ | |
+ | [drag^] |
+ |----------|----------
+ e_f pulse(frame)
+ */
-void
-TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const framepos_t& end_frame)
-{
Metrics future_map;
{
@@ -2926,22 +2824,23 @@ TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const fra
constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
*/
double contribution = 0.0;
+ double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
if (next_t && prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (next_t->frame() - prev_to_prev_t->frame());
}
frameoffset_t prev_t_frame_contribution = fr_off - (contribution * (double) fr_off);
- const double start_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
- const double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
+ double end_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
double new_bpm;
if (prev_t->type() == TempoSection::Constant || prev_t->c_func() == 0.0) {
if (prev_t->position_lock_style() == MusicTime) {
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
- new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
- / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
+
+ new_bpm = prev_t->beats_per_minute() * ((frame - prev_to_prev_t->frame())
+ / (double) ((frame + prev_t_frame_contribution) - prev_to_prev_t->frame()));
} else {
/* prev to prev is irrelevant */
@@ -2968,14 +2867,21 @@ TempoMap::gui_dilate_tempo (TempoSection* ts, const framepos_t& frame, const fra
}
}
} else {
- const frameoffset_t halfway = ((next_t->frame() + prev_t->frame()) / 2.0);
- const frameoffset_t halfway_off = halfway + prev_t_frame_contribution;
- const double halfway_pulse = prev_t->pulse_at_frame (halfway, _frame_rate);
- const double halfway_off_minute = ((halfway_off - prev_t->frame()) / (double) _frame_rate) / 60.0;
- new_bpm = (((halfway_pulse - prev_t->pulse()) * prev_t->c_func())
- / (exp (halfway_off_minute * prev_t->c_func()) - 1.0)) * (double) prev_t->note_type();
+ double frame_ratio;
+ double pulse_ratio;
+ const framepos_t pulse_pos = prev_t->frame_at_pulse (pulse, _frame_rate);
+
+ if (prev_to_prev_t) {
+ frame_ratio = (((pulse_pos - fr_off) - prev_to_prev_t->frame()) / (double) ((pulse_pos) - prev_to_prev_t->frame()));
+ pulse_ratio = ((start_pulse - prev_to_prev_t->pulse()) / (double) (end_pulse - prev_to_prev_t->pulse()));
+ } else {
+
+ frame_ratio = (((pulse_pos - fr_off) - prev_t->frame()) / (double) ((pulse_pos) - prev_t->frame()));
+ pulse_ratio = ((start_pulse) / (double) (end_pulse));
+ }
+ new_bpm = prev_t->beats_per_minute() * (pulse_ratio * frame_ratio);
}
prev_t->set_beats_per_minute (new_bpm);
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-27 07:46:23 +0000