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temporal: move_tempo() must use beats (timesig dependent) not quarters

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Paul Davis 2022-11-29 09:40:34 -07:00
parent 1f4717d93b
commit a124062fa2
1 changed files with 29 additions and 9 deletions
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38
libs/temporal/tempo.cc
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@ -1446,13 +1446,15 @@ TempoMap::move_tempo (TempoPoint const & tp, timepos_t const & when, bool push)
Beats beats;
BBT_Time bbt;
beats = when.beats ();
/* tempo changes must be on beat */
const Beats delta ((beats - tp.beats()).abs());
beats = when.beats();
if (delta < Beats (1,0)) {
return false;
}
/* XXX need to assert that meter note value is >= 4 */
MeterPoint const & mm (meter_at (beats));
beats.round_to_subdivision (mm.note_value() / 4, RoundNearest);
/* Do not allow moving a tempo marker to the same position as
* an existing one.
@ -1461,19 +1463,37 @@ TempoMap::move_tempo (TempoPoint const & tp, timepos_t const & when, bool push)
Tempos::iterator t, prev_t;
Meters::iterator m, prev_m;
/* tempo changes must be on beat */
beats = beats.round_to_beat ();
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->beats() < beats && *t != tp; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->beats() < beats; ++m) { prev_m = m; }
/* find tempo & meter in effect at the new target location */
for (t = _tempos.begin(), prev_t = _tempos.end(); t != _tempos.end() && t->beats() <= beats && *t != tp; ++t) { prev_t = t; }
for (m = _meters.begin(), prev_m = _meters.end(); m != _meters.end() && m->beats() <= beats; ++m) { prev_m = m; }
if (prev_t == _tempos.end()) {
/* moved earlier than first, no movement */
return false;
}
if (prev_m == _meters.end()) {
/* moved earlier than first, no movement */
return false;
}
/* If the previous tempo is ramped, we need to recompute its omega
* constant to cover the (new) duration of the ramp.
*/
if (prev_t->actually_ramped()) {
prev_t->compute_omega_from_distance_and_next_tempo (beats - prev_t->beats(), tp);
}
TempoMetric metric (*prev_t, *prev_m);
const Beats delta ((beats - tp.beats()).abs());
if (delta < Beats::ticks (metric.meter().ticks_per_grid())) {
return false;
}
sc = metric.superclock_at (beats);
bbt = metric.bbt_at (beats);