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Fix midi-note length when quantizing a swing rhythm

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Note: 'swing' probably requires a 2nd iteration:
first quantize notes to the grid, then apply beat shift.
This commit is contained in:
Robin Gareus 2013-10-23 17:40:35 +02:00
parent be69bf15dd
commit 20c20b7ddf
1 changed files with 5 additions and 0 deletions
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5
libs/ardour/quantize.cc
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@ -72,6 +72,9 @@ Quantize::operator () (boost::shared_ptr<MidiModel> model,
even = false; even = false;
/* TODO 'swing' probably requires a 2nd iteration:
* first quantize notes to the grid, then apply beat shift
*/
for (Evoral::Sequence<MidiModel::TimeType>::Notes::iterator i = (*s).begin(); i != (*s).end(); ++i) { for (Evoral::Sequence<MidiModel::TimeType>::Notes::iterator i = (*s).begin(); i != (*s).end(); ++i) {
double new_start = round (((*i)->time() - offset) / _start_grid) * _start_grid + offset; double new_start = round (((*i)->time() - offset) / _start_grid) * _start_grid + offset;
@ -86,6 +89,7 @@ Quantize::operator () (boost::shared_ptr<MidiModel> model,
*/ */
new_start = new_start + (2.0/3.0 * _swing * (next_grid - new_start)); new_start = new_start + (2.0/3.0 * _swing * (next_grid - new_start));
new_end = new_end + (2.0/3.0 * _swing * (next_grid - new_start));
} else if (_swing < 0.0 && !even) { } else if (_swing < 0.0 && !even) {
@ -96,6 +100,7 @@ Quantize::operator () (boost::shared_ptr<MidiModel> model,
*/ */
new_start = new_start - (2.0/3.0 * _swing * (new_start - prev_grid)); new_start = new_start - (2.0/3.0 * _swing * (new_start - prev_grid));
new_end = new_end - (2.0/3.0 * _swing * (new_start - prev_grid));
} }