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/* -*- c++ -*- */
/* Copyright 2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_DIGITAL_CRC32_BB_H
#define INCLUDED_DIGITAL_CRC32_BB_H
#include <digital_api.h>
#include <gr_tagged_stream_block.h>
class digital_crc32_bb;
typedef boost::shared_ptr<digital_crc32_bb> digital_crc32_bb_sptr;
DIGITAL_API digital_crc32_bb_sptr digital_make_crc32_bb (bool check=false, const std::string& lengthtagname="packet_len");
/*!
* \brief Byte-stream CRC block
* \ingroup digital
*
* Input: stream of bytes, which form a packet. The first byte of the packet
* has a tag with key "length" and the value being the number of bytes in the
* packet.
*
* Output: The same bytes as incoming, but trailing a CRC32 of the packet.
* The tag is re-set to the new length.
*/
class DIGITAL_API digital_crc32_bb : public gr_tagged_stream_block
{
private:
friend DIGITAL_API digital_crc32_bb_sptr digital_make_crc32_bb (bool check, const std::string& lengthtagname);
bool d_check;
digital_crc32_bb(bool check, const std::string& lengthtagname);
public:
~digital_crc32_bb();
int calculate_output_stream_length(const std::vector<int> &ninput_items);
int work (int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_DIGITAL_CRC32_BB_H */
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