blob: 706880e46b03467438f461124902d1db3f6d286f (
plain)
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
|
#include <assert.h>
#include "sample.h"
size_t pa_sample_size(const struct pa_sample_spec *spec) {
assert(spec);
size_t b = 1;
switch (spec->format) {
case PA_SAMPLE_U8:
case PA_SAMPLE_ULAW:
case PA_SAMPLE_ALAW:
b = 1;
break;
case PA_SAMPLE_S16LE:
case PA_SAMPLE_S16BE:
b = 2;
break;
case PA_SAMPLE_FLOAT32:
b = 4;
break;
default:
assert(0);
}
return b * spec->channels;
}
size_t pa_bytes_per_second(const struct pa_sample_spec *spec) {
assert(spec);
return spec->rate*pa_sample_size(spec);
}
uint32_t pa_samples_usec(size_t length, const struct pa_sample_spec *spec) {
assert(spec);
return (uint32_t) (((double) length /pa_sample_size(spec))/spec->rate*1000000);
}
int pa_sample_spec_valid(const struct pa_sample_spec *spec) {
assert(spec);
if (!spec->rate || !spec->channels)
return 0;
if (spec->format <= 0 || spec->format >= PA_SAMPLE_MAX)
return 0;
return 1;
}
int pa_sample_spec_equal(const struct pa_sample_spec*a, const struct pa_sample_spec*b) {
assert(a && b);
return (a->format == b->format) && (a->rate == b->rate) && (a->channels == b->channels);
}
|