Always apply timestamp correction to OPT.

Closes #200

Change-Id: I821d7a8336cc66593665dbc2ad794adc3fb55918

lib/dash/live_segment_index.js

@@ -255,23 +255,27 @@ shaka.dash.LiveSegmentIndex.prototype.correct = function(timestampCorrection) {
   var delta = shaka.media.SegmentIndex.prototype.correct.call(
       this, timestampCorrection);
 
+  var max = Math.min.apply(null,
+      this.references
+        .filter(function(a) { return a.endTime != null; })
+        .map(function(a) { return a.endTime - a.startTime; }));
+  if (Math.abs(delta) > max) {
+    // A timestamp correction should be less than the duration of any one
+    // segment in the stream.
+    shaka.log.warning(
+        'Timestamp correction (' + timestampCorrection + ')',
+        'is unreasonably large for live content.',
+        'The content may have errors in it.');
+  }
+
   if (this.originalPresentationTime_ != null) {
     shaka.asserts.assert(this.originalLiveEdge_ != null);
     shaka.asserts.assert(this.seekStartTime_ != null);
 
     this.originalLiveEdge_ += delta;
     this.seekStartTime_ += delta;
+    this.originalPresentationTime_ += delta;
 
-    if (this.originalLiveEdge_ > this.originalPresentationTime_) {
-      // A timestamp correction should be less than the duration of any one
-      // segment in the stream. So, the live-edge should not surpass the
-      // current presentation time, but if it does then try to recover.
-      shaka.log.warning(
-          'Timestamp correction (' + timestampCorrection + ')',
-          'is unreasonably large for live content.',
-          'The content may have errors in it.');
-      this.originalPresentationTime_ += delta;
-    }
     shaka.asserts.assert(this.originalLiveEdge_ <=
                          this.originalPresentationTime_);
   }