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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_BLOCKS_REPACK_BITS_BB_H
#define INCLUDED_BLOCKS_REPACK_BITS_BB_H
#include <blocks/api.h>
#include <gr_tagged_stream_block.h>
namespace gr {
namespace blocks {
/*!
* \brief Pack \p k bits from the input stream onto \p k bits of the output stream.
* \ingroup blocks
*
* No bits are lost here; any value for k and l (within [1, 8]) is allowed.
* On every fresh input byte, it starts reading on the LSB, and starts copying
* to the LSB as well.
*
* If a packet length tag is given, this block assumes a tagged stream.
* In this case, the tag with the packet length is updated accordingly.
* Also, the number of input bits is padded with zeros if the number of input
* bits is not an integer multiple of \p l, or bits are truncated from the input
* if \p align_output is set to true.
*/
class BLOCKS_API repack_bits_bb : virtual public gr_tagged_stream_block
{
public:
typedef boost::shared_ptr<repack_bits_bb> sptr;
/*!
* \param k Number of relevant bits on the input stream
* \param l Number of relevant bits on the output stream
* \param len_tag_key If not empty, this is the key for the length tag.
* \param align_output If len_tag_key is given, this controls if the input
* or the output is aligned.
*/
static sptr make(int k, int l=8, const std::string &len_tag_key="", bool align_output=false);
};
} // namespace blocks
} // namespace gr
#endif /* INCLUDED_BLOCKS_REPACK_BITS_BB_H */
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