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package tim.prune.function.compress.methods;
import tim.prune.data.DataPoint;
import tim.prune.data.MarkingData;
import tim.prune.data.Track;
import tim.prune.function.compress.CompressionMethodType;
import tim.prune.function.compress.TrackDetails;
public class DuplicatesMethod extends ParameterlessMethod
{
/** Number of points before this one to consider as duplicates */
private static final int NUM_POINTS_TO_BACKTRACK = 20;
public int compress(Track inTrack, TrackDetails inDetails, MarkingData inMarkings)
{
int numPoints = inTrack.getNumPoints();
int numDeleted = 0;
// Loop over all points looking for duplicates
for (int i=1; i<numPoints; i++)
{
// Don't delete points which are already marked as deleted, or the first point in a segment
if (inMarkings.isPointMarkedForDeletion(i) || inDetails.isSegmentStart(i)) {
continue;
}
DataPoint currPoint = inTrack.getPoint(i);
// Don't delete any photo points or audio points
if (currPoint.hasMedia()) {
continue;
}
// loop over last few points before this one
final int startIdx = Math.max(0, i - NUM_POINTS_TO_BACKTRACK);
for (int j = startIdx; j<i; j++)
{
if (!inMarkings.isPointMarkedForDeletion(j) && currPoint.isDuplicate(inTrack.getPoint(j)))
{
inMarkings.markPointForDeletion(i);
numDeleted++;
break;
}
}
}
return numDeleted;
}
public CompressionMethodType getType() {
return CompressionMethodType.DUPLICATES;
}
static boolean recogniseString(String inString) {
return recogniseString(inString, CompressionMethodType.DUPLICATES);
}
}
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