Log what's actually going on in the calibration in one final attempt to figure out what's going wrong here before ripping it out and going back to business as usual

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@438 ed5b42cb-e716-0410-a449-f6a68f950b19

src/java/com/threerings/media/timer/CalibratingTimer.java

@@ -22,8 +22,10 @@
 package com.threerings.media.timer;
 
 import com.samskivert.Log;
+import com.samskivert.swing.RuntimeAdjust;
 import com.samskivert.util.Interval;
 import com.samskivert.util.RunQueue;
+import com.threerings.media.MediaPrefs;
 
 /**
  * Calibrates timing values from a subclass' implementation of current against those returned by
@@ -87,9 +89,15 @@ public abstract class CalibratingTimer
     /** Calculates the drift factor from the time elapsed from the last calibrate call. */
     protected void calibrate ()
     {
-        double elapsedTimer = (current() - _driftTimerStamp);
+        long current = current();
+        double elapsedTimer = (current - _driftTimerStamp);
         double elapsedMillis = System.currentTimeMillis() - _driftMilliStamp;
         double drift = elapsedMillis / (elapsedTimer / _milliDivider);
+        if (_debugCalibrate.getValue()) {
+            Log.warning("Calibrating [timer=" + elapsedTimer + ", millis=" + elapsedMillis
+                + ", drift=" + drift + ", timerstamp=" + _driftTimerStamp + ", millistamp="
+                + _driftMilliStamp + ", current=" + current + "]");
+        }
         if (drift > 1.25 || drift < 0.75) {
             Log.warning("Calibrating [drift=" + drift + "]");
             _driftRatio = drift;
@@ -125,4 +133,9 @@ public abstract class CalibratingTimer
 
     /** Ratio of currentTimeMillis to timer millis. */
     protected double _driftRatio = 1.0;
+
+    /** A debug hook that toggles dumping of calibration values. */
+    protected static RuntimeAdjust.BooleanAdjust _debugCalibrate = new RuntimeAdjust.BooleanAdjust(
+        "Toggles calibrations statistics", "narya.media.timer",
+        MediaPrefs.config, false);
 }