1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
/*
** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
** All rights reserved.
**
** This code is released under 2-clause BSD license. Please see the
** file at : https://github.com/libsndfile/libsamplerate/blob/master/COPYING
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include "util.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846264338
#endif
void
gen_windowed_sines (int freq_count, const double *freqs, double max, float *output, int output_len)
{ int k, freq ;
double amplitude, phase ;
amplitude = max / freq_count ;
for (k = 0 ; k < output_len ; k++)
output [k] = 0.0 ;
for (freq = 0 ; freq < freq_count ; freq++)
{ phase = 0.9 * M_PI / freq_count ;
if (freqs [freq] <= 0.0 || freqs [freq] >= 0.5)
{ printf ("\n%s : Error : freq [%d] == %g is out of range. Should be < 0.5.\n", __FILE__, freq, freqs [freq]) ;
exit (1) ;
} ;
for (k = 0 ; k < output_len ; k++)
output [k] = (float) (output [k] + (amplitude * sin (freqs [freq] * (2 * k) * M_PI + phase))) ;
} ;
/* Apply Hanning Window. */
for (k = 0 ; k < output_len ; k++)
output [k] = (float) (output [k] * (0.5 - 0.5 * cos ((2 * k) * M_PI / (output_len - 1)))) ;
/* data [k] *= 0.3635819 - 0.4891775 * cos ((2 * k) * M_PI / (output_len - 1))
+ 0.1365995 * cos ((4 * k) * M_PI / (output_len - 1))
- 0.0106411 * cos ((6 * k) * M_PI / (output_len - 1)) ;
*/
return ;
} /* gen_windowed_sines */
void
save_oct_float (char *filename, float *input, int in_len, float *output, int out_len)
{ FILE *file ;
int k ;
printf ("Dumping input and output data to file : %s.\n\n", filename) ;
if (! (file = fopen (filename, "w")))
return ;
fprintf (file, "# Not created by Octave\n") ;
fprintf (file, "# name: input\n") ;
fprintf (file, "# type: matrix\n") ;
fprintf (file, "# rows: %d\n", in_len) ;
fprintf (file, "# columns: 1\n") ;
for (k = 0 ; k < in_len ; k++)
fprintf (file, "% g\n", input [k]) ;
fprintf (file, "# name: output\n") ;
fprintf (file, "# type: matrix\n") ;
fprintf (file, "# rows: %d\n", out_len) ;
fprintf (file, "# columns: 1\n") ;
for (k = 0 ; k < out_len ; k++)
fprintf (file, "% g\n", output [k]) ;
fclose (file) ;
return ;
} /* save_oct_float */
void
save_oct_double (char *filename, double *input, int in_len, double *output, int out_len)
{ FILE *file ;
int k ;
printf ("Dumping input and output data to file : %s.\n\n", filename) ;
if (! (file = fopen (filename, "w")))
return ;
fprintf (file, "# Not created by Octave\n") ;
fprintf (file, "# name: input\n") ;
fprintf (file, "# type: matrix\n") ;
fprintf (file, "# rows: %d\n", in_len) ;
fprintf (file, "# columns: 1\n") ;
for (k = 0 ; k < in_len ; k++)
fprintf (file, "% g\n", input [k]) ;
fprintf (file, "# name: output\n") ;
fprintf (file, "# type: matrix\n") ;
fprintf (file, "# rows: %d\n", out_len) ;
fprintf (file, "# columns: 1\n") ;
for (k = 0 ; k < out_len ; k++)
fprintf (file, "% g\n", output [k]) ;
fclose (file) ;
return ;
} /* save_oct_double */
void
interleave_data (const float *in, float *out, int frames, int channels)
{ int fr, ch ;
for (fr = 0 ; fr < frames ; fr++)
for (ch = 0 ; ch < channels ; ch++)
out [ch + channels * fr] = in [fr + frames * ch] ;
return ;
} /* interleave_data */
void
deinterleave_data (const float *in, float *out, int frames, int channels)
{ int fr, ch ;
for (ch = 0 ; ch < channels ; ch++)
for (fr = 0 ; fr < frames ; fr++)
out [fr + frames * ch] = in [ch + channels * fr] ;
return ;
} /* deinterleave_data */
void
reverse_data (float *data, int datalen)
{ int left, right ;
float temp ;
left = 0 ;
right = datalen - 1 ;
while (left < right)
{ temp = data [left] ;
data [left] = data [right] ;
data [right] = temp ;
left ++ ;
right -- ;
} ;
} /* reverse_data */
const char *
get_cpu_name (void)
{
const char *name = "Unknown", *search = NULL ;
static char buffer [512] ;
FILE * file = NULL ;
int is_pipe = 0 ;
#if defined (__linux__)
file = fopen ("/proc/cpuinfo", "r") ;
search = "model name" ;
#elif defined (__APPLE__)
file = popen ("/usr/sbin/system_profiler -detailLevel full SPHardwareDataType", "r") ;
search = "Processor Name" ;
is_pipe = 1 ;
#elif defined (__FreeBSD__)
file = popen ("sysctl -a", "r") ;
search = "hw.model" ;
is_pipe = 1 ;
#else
(void) search ;
(void) buffer ;
(void) file ;
(void) is_pipe ;
return name;
#endif
#if defined (__linux__) || defined (__APPLE__) || defined (__FreeBSD__)
if (search == NULL)
{ printf ("Error : search is NULL in function %s.\n", __func__) ;
return name ;
} ;
while (fgets (buffer, sizeof (buffer), file) != NULL)
if (strstr (buffer, search))
{ char *src, *dest ;
if ((src = strchr (buffer, ':')) != NULL)
{ src ++ ;
while (isspace (src [0]))
src ++ ;
name = src ;
/* Remove consecutive spaces. */
src ++ ;
for (dest = src ; src [0] ; src ++)
{ if (isspace (src [0]) && isspace (dest [-1]))
continue ;
dest [0] = src [0] ;
dest ++ ;
} ;
dest [0] = 0 ;
break ;
} ;
} ;
if (is_pipe)
pclose (file) ;
else
fclose (file) ;
return name ;
#endif
} /* get_cpu_name */
|
