Remove timestampOffset

Playlist.duration() does a more comprehensive job of managing calculations with PTS values and discontinuities so remove reference on segmentParser.

@@ -31,15 +31,6 @@
     // allow in-band metadata to be observed
     // allow in-band metadata to be observed
     self.metadataStream = new MetadataStream();
     self.metadataStream = new MetadataStream();
 
 
-    this.mediaTimelineOffset = null;
-
-    // The first timestamp value encountered during parsing. This
-    // value can be used to determine the relative timing between
-    // frames and the start of the current timestamp sequence. It
-    // should be reset to null before parsing a segment with
-    // discontinuous timestamp values from previous segments.
-    self.timestampOffset = null;
-
     // For information on the FLV format, see
     // For information on the FLV format, see
     // http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.
     // http://download.macromedia.com/f4v/video_file_format_spec_v10_1.pdf.
     // Technically, this function returns the header and a metadata FLV tag
     // Technically, this function returns the header and a metadata FLV tag
@@ -360,13 +351,6 @@
           // Skip past "optional" portion of PTS header
           // Skip past "optional" portion of PTS header
           offset += pesHeaderLength;
           offset += pesHeaderLength;
 
 
-          // keep track of the earliest encounted PTS value so
-          // external parties can align timestamps across
-          // discontinuities
-          if (self.timestampOffset === null) {
-            self.timestampOffset = pts;
-          }
-
           if (pid === self.stream.programMapTable[STREAM_TYPES.h264]) {
           if (pid === self.stream.programMapTable[STREAM_TYPES.h264]) {
             h264Stream.setNextTimeStamp(pts,
             h264Stream.setNextTimeStamp(pts,
                                         dts,
                                         dts,

@@ -890,13 +890,6 @@ videojs.Hls.prototype.drainBuffer = function(event) {
 
 
   event = event || {};
   event = event || {};
 
 
-  // if this segment starts is the start of a new discontinuity
-  // sequence, the segment parser's timestamp offset must be
-  // re-calculated
-  if (segment.discontinuity) {
-    this.segmentParser_.timestampOffset = null;
-  }
-
   // transmux the segment data from MP2T to FLV
   // transmux the segment data from MP2T to FLV
   this.segmentParser_.parseSegmentBinaryData(bytes);
   this.segmentParser_.parseSegmentBinaryData(bytes);
   this.segmentParser_.flushTags();
   this.segmentParser_.flushTags();

@@ -104,8 +104,6 @@ var
         return 'flv';
         return 'flv';
       };
       };
       this.parseSegmentBinaryData = function() {};
       this.parseSegmentBinaryData = function() {};
-      this.timestampOffset = 0;
-      this.mediaTimelineOffset = 0;
       this.flushTags = function() {};
       this.flushTags = function() {};
       this.tagsAvailable = function() {
       this.tagsAvailable = function() {
         return tags.length;
         return tags.length;
@@ -1344,9 +1342,6 @@ test('translates ID3 PTS values to cue media timeline positions', function() {
   openMediaSource(player);
   openMediaSource(player);
 
 
   player.hls.segmentParser_.parseSegmentBinaryData = function() {
   player.hls.segmentParser_.parseSegmentBinaryData = function() {
-    // setup the timestamp offset
-    this.timestampOffset = tags[0].pts;
-
     // trigger a metadata event
     // trigger a metadata event
     player.hls.segmentParser_.metadataStream.trigger('data', {
     player.hls.segmentParser_.metadataStream.trigger('data', {
       pts: 5 * 1000,
       pts: 5 * 1000,
@@ -1375,9 +1370,6 @@ test('translates ID3 PTS values across discontinuities', function() {
   openMediaSource(player);
   openMediaSource(player);
 
 
   player.hls.segmentParser_.parseSegmentBinaryData = function() {
   player.hls.segmentParser_.parseSegmentBinaryData = function() {
-    if (this.timestampOffset === null) {
-      this.timestampOffset = tags[0].pts;
-    }
     // trigger a metadata event
     // trigger a metadata event
     if (events.length) {
     if (events.length) {
       player.hls.segmentParser_.metadataStream.trigger('data', events.shift());
       player.hls.segmentParser_.metadataStream.trigger('data', events.shift());
@@ -1395,7 +1387,6 @@ test('translates ID3 PTS values across discontinuities', function() {
                            '1.ts\n');
                            '1.ts\n');
 
 
   // segment 0 starts at PTS 14000 and has a cue point at 15000
   // segment 0 starts at PTS 14000 and has a cue point at 15000
-  player.hls.segmentParser_.timestampOffset = 14 * 1000;
   tags.push({ pts: 14 * 1000, bytes: new Uint8Array(1) },
   tags.push({ pts: 14 * 1000, bytes: new Uint8Array(1) },
             { pts: 24 * 1000, bytes: new Uint8Array(1) });
             { pts: 24 * 1000, bytes: new Uint8Array(1) });
   events.push({
   events.push({