ardour/livetrax
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Tempo ramps - comment new meter section behaviour.

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This commit is contained in:
nick_m 2016-02-28 07:01:24 +11:00
parent 0660705fdc
commit d7ec204bf6
1 changed files with 16 additions and 10 deletions
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26
libs/ardour/tempo.cc
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@ -443,6 +443,20 @@ TempoSection::update_bbt_time_from_bar_offset (const Meter& meter)
/***********************************************************************/
/*
if a meter section is position locked to frames, then it can only be at 1|1|0.
thus we can have multiple 1|1|0s in the session tempo map.
like this:
BBT 1|1|0 2|1|0 3|1|0 1|1|0
beat 0 4 8 12
all other meter sections are locked to beats.
the beat of a meter section is used to find its position rather than the stored bbt.
*/
const string MeterSection::xml_state_node_name = "Meter";
MeterSection::MeterSection (const XMLNode& node)
@ -696,10 +710,6 @@ TempoMap::do_insert (MetricSection* section)
if ((m = dynamic_cast<MeterSection*>(section)) != 0) {
assert (m->bbt().ticks == 0);
/* we need to (potentially) update the BBT times of tempo
sections based on this new meter.
*/
if ((m->bbt().beats != 1) || (m->bbt().ticks != 0)) {
pair<double, BBT_Time> corrected = make_pair (m->beat(), m->bbt());
@ -727,7 +737,6 @@ TempoMap::do_insert (MetricSection* section)
if (tempo && insert_tempo) {
/* Tempo sections */
PositionLockStyle const tpl = tempo->position_lock_style();
PositionLockStyle const ipl = insert_tempo->position_lock_style();
if ((ipl == MusicTime && tempo->beat() == insert_tempo->beat()) || (ipl == AudioTime && tempo->frame() == insert_tempo->frame())) {
@ -751,7 +760,6 @@ TempoMap::do_insert (MetricSection* section)
/* Meter Sections */
MeterSection* const meter = dynamic_cast<MeterSection*> (*i);
MeterSection* const insert_meter = dynamic_cast<MeterSection*> (section);
PositionLockStyle const mpl = meter->position_lock_style();
PositionLockStyle const ipl = insert_meter->position_lock_style();
if ((ipl == MusicTime && meter->beat() == insert_meter->beat()) || (ipl == AudioTime && meter->frame() == insert_meter->frame())) {
@ -792,9 +800,7 @@ TempoMap::do_insert (MetricSection* section)
if (meter) {
PositionLockStyle const ipl = insert_meter->position_lock_style();
if (ipl == MusicTime && meter->beat() > insert_meter->beat()) {
break;
} else if (ipl == AudioTime && meter->frame() > insert_meter->frame()) {
if ((ipl == MusicTime && meter->beat() > insert_meter->beat()) || (ipl == AudioTime && meter->frame() > insert_meter->frame())) {
break;
}
}
@ -813,7 +819,7 @@ TempoMap::do_insert (MetricSection* section)
}
metrics.insert (i, section);
dump (std::cerr);
//dump (std::cerr);
}
}