1 /* -*- c++ -*- */
2 /*
3 * Copyright 2011-2012 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
21 */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #define _ISOC9X_SOURCE
28 #include "float_array_to_int.h"
29 #include <math.h>
30 #if __cplusplus >= 201103L
31 #include <cstdint>
32 using std::int64_t;
33 #else
34 #include <stdint.h>
35 #endif
36
37 static const int64_t MAX_INT = INT32_MAX;
38 static const int64_t MIN_INT = INT32_MIN;
39
float_array_to_int(const float * in,int * out,float scale,int nsamples)40 void float_array_to_int(const float* in, int* out, float scale, int nsamples)
41 {
42 for (int i = 0; i < nsamples; i++) {
43 int64_t r = llrintf(scale * in[i]);
44 if (r < MIN_INT)
45 r = MIN_INT;
46 else if (r > MAX_INT)
47 r = MAX_INT;
48 out[i] = static_cast<int>(r);
49 }
50 }
51