Parse VP9 compressed header

media/filters/vp9_raw_bits_reader.h

 // Copyright 2015 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.
 
 #ifndef MEDIA_FILTERS_VP9_RAW_BITS_READER_H_
 #define MEDIA_FILTERS_VP9_RAW_BITS_READER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 30 matching lines @@
   bool ReadBool();
 
   // Reads a literal with |bits| bits.
   // If the read goes beyond the end of buffer, the return value is undefined.
   int ReadLiteral(int bits);
 
   // Reads a signed literal with |bits| bits (not including the sign bit).
   // If the read goes beyond the end of buffer, the return value is undefined.
   int ReadSignedLiteral(int bits);
 
+  // Consumes trailing bits up to next byte boundary. Returns true if no
+  // trailing bits or they are all zero.
+  bool ConsumeTrailingBits();
+
  private:
   std::unique_ptr<BitReader> reader_;
 
   // Indicates if none of the reads since the last Initialize() call has gone
   // beyond the end of available data.
   bool valid_;
 
   DISALLOW_COPY_AND_ASSIGN(Vp9RawBitsReader);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VP9_RAW_BITS_READER_H_