Convert media constants to constexpr.

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 193 matching lines @@
   // next to it, and merges them if so.
   void MergeWithAdjacentRangeIfNecessary(
       const RangeList::iterator& range_with_new_buffers_itr);
 
   // Returns true if |second_timestamp| is the timestamp of the next buffer in
   // sequence after |first_timestamp|, false otherwise.
   bool AreAdjacentInSequence(
       DecodeTimestamp first_timestamp, DecodeTimestamp second_timestamp) const;
 
   // Helper method that returns the timestamp for the next buffer that
-  // |selected_range_| will return from GetNextBuffer() call, or kNoTimestamp()
+  // |selected_range_| will return from GetNextBuffer() call, or kNoTimestamp
   // if in between seeking (i.e. |selected_range_| is null).
   DecodeTimestamp GetNextBufferTimestamp();
 
   // Finds the range that should contain a coded frame group that begins with
   // |start_timestamp| and returns the iterator pointing to it. Returns
   // |ranges_.end()| if there's no such existing range.
   RangeList::iterator FindExistingRangeFor(DecodeTimestamp start_timestamp);
 
   // Inserts |new_range| into |ranges_| preserving sorted order. Returns an
   // iterator in |ranges_| that points to |new_range|.
@@ skipping 40 matching lines @@
   void CompleteConfigChange();
 
   // Sets |selected_range_| and seeks to the nearest keyframe after
   // |timestamp| if necessary and possible. This method only attempts to
   // set |selected_range_| if |seleted_range_| is null and |track_buffer_|
   // is empty.
   void SetSelectedRangeIfNeeded(const DecodeTimestamp timestamp);
 
   // Find a keyframe timestamp that is >= |start_timestamp| and can be used to
   // find a new selected range.
-  // Returns kNoTimestamp() if an appropriate keyframe timestamp could not be
+  // Returns kNoTimestamp if an appropriate keyframe timestamp could not be
   // found.
   DecodeTimestamp FindNewSelectedRangeSeekTimestamp(
       const DecodeTimestamp start_timestamp);
 
   // Searches |ranges_| for the first keyframe timestamp that is >= |timestamp|.
   // If |ranges_| doesn't contain a GOP that covers |timestamp| or doesn't
-  // have a keyframe after |timestamp| then kNoTimestamp() is returned.
+  // have a keyframe after |timestamp| then kNoTimestamp is returned.
   DecodeTimestamp FindKeyframeAfterTimestamp(const DecodeTimestamp timestamp);
 
   // Returns "VIDEO" for a video SourceBufferStream, "AUDIO" for an audio
   // stream, and "TEXT" for a text stream.
   std::string GetStreamTypeName() const;
 
   // Returns true if end of stream has been reached, i.e. the
   // following conditions are met:
   // 1. end of stream is marked and there is nothing in the track_buffer.
   // 2. We don't have any ranges, or the last or no range is selected,
@@ skipping 119 matching lines @@
   // appended.
   RangeList::iterator range_for_next_append_;
 
   // True when the next call to Append() begins a new coded frame group.
   // TODO(wolenetz): Simplify by passing this flag into Append().
   bool new_coded_frame_group_ = false;
 
   // The timestamp of the last buffer appended to the coded frame group, set to
   // kNoDecodeTimestamp() if the beginning of the group.
   DecodeTimestamp last_appended_buffer_timestamp_ = kNoDecodeTimestamp();
-  base::TimeDelta last_appended_buffer_duration_ = kNoTimestamp();
+  base::TimeDelta last_appended_buffer_duration_ = kNoTimestamp;
   bool last_appended_buffer_is_keyframe_ = false;
 
   // The decode timestamp on the last buffer returned by the most recent
   // GetNextBuffer() call. Set to kNoDecodeTimestamp() if GetNextBuffer() hasn't
   // been called yet or a seek has happened since the last GetNextBuffer() call.
   DecodeTimestamp last_output_buffer_timestamp_;
 
   // Stores the largest distance between two adjacent buffers in this stream.
   base::TimeDelta max_interbuffer_distance_;
 
@@ skipping 27 matching lines @@
   int num_track_buffer_gap_warning_logs_ = 0;
   int num_garbage_collect_algorithm_logs_ = 0;
   int num_strange_same_timestamps_logs_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(SourceBufferStream);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_SOURCE_BUFFER_STREAM_H_