text: /*
   *      Copyright (C) 2010-2016 Hendrik Leppkes
   *      http://www.1f0.de
   *
   *  This program is free software; you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation; either version 2 of the License, or
   *  (at your option) any later version.
   *
   *  This program is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along
   *  with this program; if not, write to the Free Software Foundation, Inc.,
   *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   *  Initial design and concept by Gabest and the MPC-HC Team, copyright under GPLv2
   */
  
  #pragma once
  
  struct GetBitContext;
  
  /**
  * Byte Parser Utility Class
  */
  class CByteParser
  {
  public:
    /** Construct a Byte Parser to parse the given BYTE array with the given length */
    CByteParser(const BYTE *pData, size_t length);
    virtual ~CByteParser();
  
    /** Read 1 to 32 Bits from the Byte Array. If peek is set, the data will just be returned, and the buffer not advanced. */
    unsigned int BitRead(unsigned int numBits, bool peek = false);
  
    /** Skip any number of bits from the byte array */
    void BitSkip(unsigned int numBits);
  
    /** Read a unsigned number in Exponential Golomb encoding (with k = 0) */
    unsigned int UExpGolombRead();
    /** Read a signed number in Exponential Golomb encoding (with k = 0) */
    int SExpGolombRead();
  
    /** Pointer to the start of the byte array */
    const BYTE *Start() const { return m_pData; }
    /** Pointer to the end of the byte array */
    const BYTE *End() const { return m_pEnd; }
  
    /** Overall length (in bytes) of the byte array */
    size_t Length() const;
  
    size_t Pos() const;
  
    /** Number of bytes remaining in the array */
    size_t Remaining() const { return RemainingBits() >> 3; }
  
    /** Number of bits remaining */
    size_t RemainingBits() const;
  
    void BitByteAlign();
  
  private:
    GetBitContext *m_gbCtx = nullptr;
  
    const BYTE *m_pData    = nullptr;
    const BYTE *m_pEnd     = nullptr;
  };
  