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/*
* vdr-plugin-vnsi - KODI server plugin for VDR
*
* Copyright (C) 2010 Alwin Esch (Team XBMC)
* Copyright (C) 2015 Team KODI
*
* http://kodi.tv
*
* 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 KODI; see the file COPYING. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef VNSI_BITSTREAM_H
#define VNSI_BITSTREAM_H
#include <stdint.h>
#include <stddef.h>
class cBitstream
{
private:
uint8_t *const m_data;
size_t m_offset = 0;
const size_t m_len;
bool m_error = false;
const bool m_doEP3 = false;
public:
constexpr cBitstream(uint8_t *data, size_t bits)
:m_data(data), m_len(bits)
{
}
// 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
constexpr 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_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();
constexpr size_t length() const { return m_len; }
constexpr bool isError() const { return m_error; }
};
#endif // VNSI_BITSTREAM_H
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