/*
* (non-Javadoc)
*
* @see
* si.vicos.annotations.editor.tracking.TrackingEditor.EditAssistant#editFrame
* (si.vicos.annotations.editor.tracking.EditableAnnotatedSequence, int,
* si.vicos.annotations.Annotation)
*/
@Override
public EditList editFrame(EditableAnnotatedSequence sequence, int frame, Annotation region) {
EditList list = new EditList();
try {
list.add(new EditRegionOperation(frame, region));
list.add(new EditTagAddOperation(frame, "keyframe"));
// Interpolate forward if possible
int last = 0;
for (last = frame + 1; last < sequence.size(); last++)
if (sequence.hasTag(last, "keyframe") && !sequence.get(last).isNull()) break;
if (!(last == sequence.size() || frame > last - 2))
list.addAll(interpolate(sequence, frame, region, last, sequence.get(frame)));
// Interpolate backwards if possible
int first = 0;
for (first = frame - 1; first >= 0; first--)
if (sequence.hasTag(first, "keyframe") && !sequence.get(first).isNull()) break;
if (!(first == -1 || first > frame - 2))
list.addAll(interpolate(sequence, first, sequence.get(first), frame, region));
} catch (Exception e) {
Application.getApplicationLogger().report(e);
}
return list;
}
/**
* Interpolate.
*
* @param sequence the sequence
* @param start the start
* @param startValue the start value
* @param stop the stop
* @param stopValue the stop value
* @return the edits the list
*/
private EditList interpolate(
EditableAnnotatedSequence sequence,
int start,
Annotation startValue,
int stop,
Annotation stopValue) {
if (start > stop - 2) throw new IllegalArgumentException("Interval too short");
if (startValue == null) throw new IllegalArgumentException("Start item does not exist");
if (stopValue == null) throw new IllegalArgumentException("Stop item does not exist");
if (startValue.isNull()) throw new IllegalArgumentException("Start value is not set");
if (stopValue.isNull()) throw new IllegalArgumentException("Stop value is not set");
float step = 1.0f / (float) (stop - start);
float value = step;
Interpolator interpolator = new Interpolator(startValue, stopValue);
EditList list = new EditList();
for (int i = start + 1; i < stop; i++) {
Annotation a = interpolator.interpolate(value);
if (a == null) continue;
list.add(new EditableAnnotatedSequence.EditRegionOperation(i, a));
value += step;
}
return list;
}