X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fcorrelate%2FPointMediaPair.java;fp=src%2Ftim%2Fprune%2Fcorrelate%2FPointMediaPair.java;h=7e4b6de2a7ede28ba355d5d102bac68c358dd7b7;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/correlate/PointMediaPair.java b/src/tim/prune/correlate/PointMediaPair.java
new file mode 100644
index 0000000..7e4b6de
--- /dev/null
+++ b/src/tim/prune/correlate/PointMediaPair.java
@@ -0,0 +1,125 @@
+package tim.prune.correlate;
+
+import tim.prune.data.DataPoint;
+import tim.prune.data.MediaObject;
+
+/**
+ * Class to hold a pair of points used to hold the result of correlation
+ */
+public class PointMediaPair
+{
+	private MediaObject _media = null;
+	private DataPoint _pointBefore = null;
+	private DataPoint _pointAfter = null;
+	private long _secondsBefore = 1L;
+	private long _secondsAfter = -1L;
+
+
+	/**
+	 * Constructor
+	 * @param inMedia media object
+	 */
+	public PointMediaPair(MediaObject inMedia) {
+		_media = inMedia;
+	}
+
+	/**
+	 * Add a point to the pair
+	 * @param inPoint data point
+	 * @param inSeconds number of seconds time difference, positive means point later
+	 */
+	public void addPoint(DataPoint inPoint, long inSeconds)
+	{
+		// Check if point is closest point before
+		if (inSeconds <= 0)
+		{
+			// point stamp is before media stamp
+			if (inSeconds > _secondsBefore || _secondsBefore > 0L)
+			{
+				// point stamp is nearer to media
+				_pointBefore = inPoint;
+				_secondsBefore = inSeconds;
+			}
+		}
+		// Check if point is closest point after
+		if (inSeconds >= 0)
+		{
+			// point stamp is after media stamp
+			if (inSeconds < _secondsAfter || _secondsAfter < 0L)
+			{
+				// point stamp is nearer to media
+				_pointAfter = inPoint;
+				_secondsAfter = inSeconds;
+			}
+		}
+	}
+
+
+	/**
+	 * @return Media object
+	 */
+	public MediaObject getMedia() {
+		return _media;
+	}
+
+	/**
+	 * @return the closest point before the media
+	 */
+	public DataPoint getPointBefore() {
+		return _pointBefore;
+	}
+
+	/**
+	 * @return number of seconds between media and subsequent point
+	 */
+	public long getSecondsBefore() {
+		return _secondsBefore;
+	}
+
+	/**
+	 * @return the closest point after the media
+	 */
+	public DataPoint getPointAfter() {
+		return _pointAfter;
+	}
+
+	/**
+	 * @return number of seconds between previous point and media
+	 */
+	public long getSecondsAfter() {
+		return _secondsAfter;
+	}
+
+	/**
+	 * @return true if both points found
+	 */
+	public boolean isValid() {
+		return getPointBefore() != null && getPointAfter() != null;
+	}
+
+	/**
+	 * @return the fraction of the distance along the interpolated line
+	 */
+	public double getFraction()
+	{
+		if (_secondsAfter == 0L) return 0.0;
+		return (-_secondsBefore * 1.0 / (-_secondsBefore + _secondsAfter));
+	}
+
+	/**
+	 * @return the number of seconds to the nearest point
+	 */
+	public long getMinSeconds() {
+		return Math.min(_secondsAfter, -_secondsBefore);
+	}
+
+	/**
+	 * @return angle from media to nearest point in radians
+	 */
+	public double getMinRadians()
+	{
+		double totalRadians = DataPoint.calculateRadiansBetween(_pointBefore, _pointAfter);
+		double frac = getFraction();
+		return totalRadians * Math.min(frac, 1-frac);
+	}
+}