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/*
* Copyright (C) 2010-2014 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);
/** 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;
};
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