/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2014 The srsLTE Developers. See the
 * COPYRIGHT file at the top-level directory of this distribution.
 *
 * \section LICENSE
 *
 * This file is part of the srsLTE library.
 *
 * srsLTE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsLTE 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 Lesser General Public License for more details.
 *
 * A copy of the GNU Lesser General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */


/* Functions that generate the test data fed into the DSP modules being developed */
#include <complex.h>
#include <stdio.h>
#include <stdlib.h>

#include <skeleton.h>
#include <params.h>

#define INCLUDE_DEFS_ONLY
#include "template.h"

int offset=0;

/**
 *  Generates input signal. VERY IMPORTANT to fill length vector with the number of
 * samples that have been generated.
 * @param inp Input interface buffers. Data from other interfaces is stacked in the buffer.
 * Use in(ptr,idx) to access the address.
 *
 * @param lengths Save on n-th position the number of samples generated for the n-th interface
 */
int generate_input_signal(void *in, int *lengths)
{
  int i;
  input_t *input = in;
  int block_length;
  pmid_t blen_id;

  blen_id = param_id("block_length");
  if (!blen_id) {
    moderror("Parameter block_length not found\n");
    return -1;
  }
  if (!param_get_int(blen_id,&block_length)) {
    moderror("Getting integer parameter block_length\n");
    return -1;
  }

  modinfo_msg("Parameter block_length is %d\n",block_length);


  /** HERE INDICATE THE LENGTH OF THE SIGNAL */
  lengths[0] = block_length;

  for (i=0;i<block_length;i++) {
#ifdef GENESRSLTE_TCOD_RATE_COMPLEX
    __real__ input[i] = (float) ((i+offset)%(block_length));
    __imag__ input[i] = (float) ((block_length-i-1+offset)%(block_length));
#else
    input[i] = (i+offset)%(block_length);
#endif
  }
  offset++;
  return 0;
}