Add kSeekToStartFudgeRoom to SourceBufferStream

media/filters/source_buffer_stream.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // SourceBufferStream is a data structure that stores media Buffers in ranges.
 // Buffers can be appended out of presentation order. Buffers are retrieved by
 // seeking to the desired start point and calling GetNextBuffer(). Buffers are
 // returned in sequential presentation order.
 
 #ifndef MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_
@@ skipping 156 matching lines @@
   RangeList::iterator AddToRanges(SourceBufferRange* new_range);
 
   // Returns an iterator that points to the place in |ranges_| where
   // |selected_range_| lives.
   RangeList::iterator GetSelectedRangeItr();
 
   // Sets the |selected_range_| to |range| and resets the next buffer position
   // for the previous |selected_range_|.
   void SetSelectedRange(SourceBufferRange* range);
 
-  // Returns true if |timestamp| occurs before the start timestamp of the first
-  // range in |ranges_|, false otherwise or if |ranges_| is empty.
-  bool IsBeforeFirstRange(base::TimeDelta timestamp) const;
+  // Returns true if |seek_timestamp| refers to the beginning of the first range
+  // in |ranges_|, false otherwise or if |ranges_| is empty.
+  bool ShouldSeekToStartOfBuffered(base::TimeDelta seek_timestamp) const;
 
   // Returns true if the timestamps of |buffers| are monotonically increasing
   // since the previous append to the media segment, false otherwise.
   bool IsMonotonicallyIncreasing(const BufferQueue& buffers) const;
 
   // Returns true if |selected_range_| is the only range in |ranges_| that
   // HasNextBufferPosition().
   bool OnlySelectedRangeIsSeeked() const;
 
   // Measures the distances between buffer timestamps and tracks the max.
@@ skipping 61 matching lines @@
 
   // Stores the largest distance between two adjacent buffers in this stream.
   base::TimeDelta max_interbuffer_distance_;
 
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_