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
|
#include <chromaprint.h>
#include <sox.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define NUM_SAMPLES 2048
int decode_audio_file(ChromaprintContext* ctx, const char* file_name) {
sox_format_t* in_fmt = sox_open_read(file_name, NULL, NULL, NULL);
if (!in_fmt) {
fprintf(stderr, "ERROR: couldn't open file for read\n");
return 0;
}
chromaprint_start(ctx, (int)in_fmt->signal.rate,
(int)in_fmt->signal.channels);
sox_sample_t samples[NUM_SAMPLES];
int16_t conv_samples[NUM_SAMPLES];
size_t number_read;
size_t c = 0; // unused
while ((number_read = sox_read(in_fmt, samples, NUM_SAMPLES)) > 0) {
for (size_t i = 0; i < number_read; i++) {
SOX_SAMPLE_LOCALS;
conv_samples[i] = SOX_SAMPLE_TO_SIGNED_16BIT(samples[i], c);
}
if (!chromaprint_feed(ctx, conv_samples, (int)number_read)) {
fprintf(stderr, "ERROR: fingerprint data ingestion failed\n");
goto error;
}
}
if (!chromaprint_finish(ctx)) {
fprintf(stderr, "ERROR: fingerprint calculation failed\n");
goto error;
}
return 1;
error:
sox_close(in_fmt);
return 0;
}
int main(int argc, char** argv) {
int num_file_names = 0;
int raw_fingerprint_size[2];
uint32_t* raw_fingerprints[2] = {0};
char* file_names[2];
ChromaprintContext* chromaprint_ctx;
int algo = CHROMAPRINT_ALGORITHM_DEFAULT, num_failed = 0;
for (int i = 1; i < argc; i++) {
char* arg = argv[i];
if (!strcmp(arg, "-algo") && i + 1 < argc) {
const char* v = argv[++i];
if (!strcmp(v, "test1")) {
algo = CHROMAPRINT_ALGORITHM_TEST1;
} else if (!strcmp(v, "test2")) {
algo = CHROMAPRINT_ALGORITHM_TEST2;
} else if (!strcmp(v, "test3")) {
algo = CHROMAPRINT_ALGORITHM_TEST3;
} else if (!strcmp(v, "test4")) {
algo = CHROMAPRINT_ALGORITHM_TEST4;
} else {
fprintf(stderr,
"WARNING: unknown algorithm, using the default\n");
}
} else if (!strcmp(arg, "-set") && i + 1 < argc) {
i += 1;
} else if (num_file_names < 2) {
file_names[num_file_names++] = argv[i];
}
}
if (num_file_names != 2) {
printf("usage: %s [OPTIONS] FILE1 FILE2\n\n", argv[0]);
return 2;
}
sox_format_init();
chromaprint_ctx = chromaprint_new(algo);
for (int i = 1; i < argc; i++) {
char* arg = argv[i];
if (!strcmp(arg, "-set") && i + 1 < argc) {
char* name = argv[++i];
char* value = strchr(name, '=');
if (value) {
*value++ = '\0';
chromaprint_set_option(chromaprint_ctx, name,
(int)strtol(value, NULL, 0));
}
}
}
for (int i = 0; i < num_file_names; i++) {
char* file_name = file_names[i];
if (!decode_audio_file(chromaprint_ctx, file_name)) {
fprintf(stderr,
"ERROR: unable to calculate fingerprint for file %s, "
"skipping\n",
file_name);
num_failed++;
continue;
}
if (!chromaprint_get_raw_fingerprint(chromaprint_ctx,
&raw_fingerprints[i],
&raw_fingerprint_size[i])) {
fprintf(stderr,
"ERROR: unable to calculate fingerprint for file %s, "
"skipping\n",
file_name);
num_failed++;
continue;
}
}
if (num_failed == 0) {
int size_sum = raw_fingerprint_size[0] + raw_fingerprint_size[1];
int setbits = 0;
int i;
for (i = 0; i < raw_fingerprint_size[0] && i < raw_fingerprint_size[1];
i++) {
int32_t thisdiff = raw_fingerprints[0][i] ^ raw_fingerprints[1][i];
setbits += __builtin_popcount(thisdiff);
}
const int int32_bits = 32;
setbits += (size_sum - 2 * i) * int32_bits;
printf("%f\n", setbits / ((size_sum - i) * int32_bits * 1.0));
} else {
fprintf(
stderr,
"ERROR: Couldn't calculate both fingerprints; can't compare.\n");
printf("1.0\n");
}
if (raw_fingerprints[0]) {
chromaprint_dealloc(raw_fingerprints[0]);
}
if (raw_fingerprints[1]) {
chromaprint_dealloc(raw_fingerprints[1]);
}
chromaprint_free(chromaprint_ctx);
sox_format_quit();
return num_failed ? 1 : 0;
}
|
