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/*
* Copyright (C) 2005-2012 Team XBMC
* http://www.xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef BITSTREAM_H
#define BITSTREAM_H
#include <inttypes.h>
#include <stddef.h>
namespace TSDemux
{
class CBitstream
{
private:
uint8_t *m_data;
size_t m_offset;
const size_t m_len;
bool m_error;
const bool m_doEP3;
public:
CBitstream(uint8_t *data, size_t bits)
: m_data(data)
, m_offset(0)
, m_len(bits)
, m_error(false)
, m_doEP3(false)
{}
// this is a bitstream that has embedded emulation_prevention_three_byte
// sequences that need to be removed as used in HECV.
// Data must start at byte 2
CBitstream(uint8_t *data, size_t bits, bool doEP3)
: m_data(data)
, m_offset(16) // skip header and use as sentinel for EP3 detection
, m_len(bits)
, m_error(false)
, m_doEP3(true)
{}
void skipBits(unsigned int num);
unsigned int readBits(int num);
unsigned int showBits(int num);
unsigned int readBits1() { return readBits(1); }
unsigned int readGolombUE(int maxbits = 32);
signed int readGolombSE();
size_t length() { return m_len; }
bool isError() { return m_error; }
};
}
#endif /* BITSTREAM_H */
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