/* -*- c++ -*- */

/*

 * Copyright 2004,2010 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.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <gr_interleave.h>

#include <gr_io_signature.h>

#include <string.h>

gr_interleave_sptr

gr_make_interleave (size_t itemsize)

{

  return gnuradio::get_initial_sptr(new gr_interleave (itemsize));

}

gr_interleave::gr_interleave (size_t itemsize)

  : gr_sync_interpolator ("interleave",

                          gr_make_io_signature (1, gr_io_signature::IO_INFINITE, itemsize),

                          gr_make_io_signature (1, 1, itemsize),

                          1),

    d_itemsize (itemsize)

{

}

gr_interleave::~gr_interleave ()

{

  // NOP

}

bool

gr_interleave::check_topology (int ninputs, int noutputs)

{

  set_interpolation (ninputs);

  return true;

}

int

gr_interleave::work (int noutput_items,

                     gr_vector_const_void_star &input_items,

                     gr_vector_void_star &output_items)

{

  size_t nchan = input_items.size ();

  size_t itemsize = d_itemsize;

  const char **in = (const char **) &input_items[0];

  char *out = (char *) output_items[0];

  for (int i = 0; i < noutput_items; i += nchan){

    for (unsigned int n = 0; n < nchan; n++){

      memcpy (out, in[n], itemsize);

      out += itemsize;

      in[n] += itemsize;

    }

  }

  return noutput_items;

}