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-rw-r--r--libs/ardour/tempo.cc135
1 files changed, 133 insertions, 2 deletions
diff --git a/libs/ardour/tempo.cc b/libs/ardour/tempo.cc
index 3227278875..7fd41b12c1 100644
--- a/libs/ardour/tempo.cc
+++ b/libs/ardour/tempo.cc
@@ -2654,6 +2654,10 @@ TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
Metrics future_map;
TempoSection* ts = 0;
+ if (frame <= first_meter().frame()) {
+ return;
+ }
+
if (ms->position_lock_style() == AudioTime) {
/* disabled for now due to faked tempo locked to meter pulse */
return;
@@ -2678,8 +2682,8 @@ TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
constant to constant is straightforward, as the tempo prev to prev_t has constant slope.
*/
double contribution = 0.0;
- frameoffset_t frame_contribution = 0.0;
- frameoffset_t prev_t_frame_contribution = 0.0;
+ frameoffset_t frame_contribution = 0;
+ frameoffset_t prev_t_frame_contribution = fr_off;
if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
/* prev to prev_t's position will remain constant in terms of frame and pulse. lets use frames. */
@@ -2778,6 +2782,133 @@ TempoMap::gui_dilate_tempo (MeterSection* ms, const framepos_t& frame)
MetricPositionChanged (); // Emit Signal
}
+void
+TempoMap::gui_dilate_tempo (const framepos_t& frame, const framepos_t& end_frame)
+{
+ Metrics future_map;
+ TempoSection* ts = 0;
+
+
+ {
+ Glib::Threads::RWLock::WriterLock lm (lock);
+ ts = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
+ if (!ts) {
+ return;
+ }
+ TempoSection* prev_t = copy_metrics_and_point (_metrics, future_map, ts);
+ TempoSection* prev_to_prev_t = 0;
+ const frameoffset_t fr_off = end_frame - frame;
+ double new_bpm = 0.0;
+
+ 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;
+ frameoffset_t frame_contribution = 0;
+ frameoffset_t prev_t_frame_contribution = fr_off;
+
+ if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
+ /* prev to prev_t's position will remain constant in terms of frame and pulse. lets use frames. */
+ contribution = (prev_t->frame() - prev_to_prev_t->frame()) / (double) (frame - prev_to_prev_t->frame());
+ frame_contribution = contribution * (double) fr_off;
+ prev_t_frame_contribution -= frame_contribution;
+ }
+
+ 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 */
+ const double meter_pulse = prev_t->pulse_at_frame (frame, _frame_rate);
+ const double frame_pulse = prev_t->pulse_at_frame (end_frame, _frame_rate);
+
+ if (frame_pulse != prev_t->pulse()) {
+ new_bpm = prev_t->beats_per_minute() * ((meter_pulse - prev_t->pulse()) / (frame_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 if (prev_t->c_func() < 0.0) {
+ if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
+ new_bpm = prev_t->tempo_at_frame (prev_t->frame() + frame_contribution, _frame_rate) * (double) prev_t->note_type();
+ } else {
+ /* prev_to_prev_t is irrelevant */
+ new_bpm = prev_t->tempo_at_frame (prev_t->frame() + fr_off, _frame_rate) * (double) prev_t->note_type();
+
+ }
+ const double end_minute = ((end_frame - prev_t->frame()) / (double) _frame_rate) / 60.0;
+ const double end_tempo = prev_t->tempo_at_frame (end_frame, _frame_rate);
+ const double future_c = log (end_tempo / (new_bpm / (double) prev_t->note_type())) / end_minute;
+
+ /* limits - a bit clunky, but meh */
+ if (future_c > -20.1 && future_c < 20.1) {
+ new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
+ / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
+ }
+
+ } else if (prev_t->c_func() > 0.0) {
+ if (prev_to_prev_t && prev_to_prev_t->type() == TempoSection::Ramp) {
+ new_bpm = prev_t->tempo_at_frame (prev_t->frame() - frame_contribution, _frame_rate) * (double) prev_t->note_type();
+ } else {
+ /* prev_to_prev_t is irrelevant */
+ new_bpm = prev_t->tempo_at_frame (prev_t->frame() - fr_off, _frame_rate) * (double) prev_t->note_type();
+ }
+ const double end_minute = ((end_frame - prev_t->frame()) / (double) _frame_rate) / 60.0;
+ const double end_tempo = prev_t->tempo_at_frame (end_frame, _frame_rate);
+ const double future_c = log (end_tempo / (new_bpm / (double) prev_t->note_type())) / end_minute;
+
+ /* limits - a bit clunky, but meh */
+ if (future_c > -20.1 && future_c < 20.1) {
+ new_bpm = prev_t->beats_per_minute() * ((frame - prev_t->frame())
+ / (double) ((frame + prev_t_frame_contribution) - prev_t->frame()));
+ }
+ }
+
+ prev_t->set_beats_per_minute (new_bpm);
+ recompute_tempos (future_map);
+ recompute_meters (future_map);
+
+ if (check_solved (future_map, true)) {
+
+ prev_t = const_cast<TempoSection*>(&tempo_section_at_locked (_metrics, frame - 1));
+ prev_t->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
+}
+
framecnt_t
TempoMap::bbt_duration_at (framepos_t pos, const BBT_Time& bbt, int dir)
{
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-23 01:52:40 +0000