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
|
#include <string.h>
#include "macro.h"
#include "zero.h"
static void zero_u8(void *dst, size_t dstr, size_t bytes) {
uint8_t *d = dst;
if (dstr == 1)
memset(dst, 0x80, bytes);
else {
for (; bytes > 0; bytes --, d += dstr)
*d = 0x80;
}
}
static void zero_16(void *dst, size_t dstr, size_t bytes) {
uint16_t *d = dst;
unsigned n = bytes/sizeof(uint16_t);
if (dstr == sizeof(uint16_t))
memset(dst, 0, bytes);
else {
for (; n > 0; n --, d += dstr/sizeof(uint16_t))
*d = 0;
}
}
static void zero_32(void *dst, size_t dstr, size_t bytes) {
uint32_t *d = dst;
unsigned n = bytes/sizeof(float);
if (dstr == sizeof(uint32_t))
memset(dst, 0, bytes);
else {
for (; n > 0; n --, d += dstr/sizeof(uint32_t))
*d = 0;
}
}
zero_func_t get_zero_func(sa_pcm_format_t f) {
static const zero_func_t funcs[_SA_PCM_FORMAT_MAX] = {
[SA_PCM_FORMAT_U8] = zero_u8,
[SA_PCM_FORMAT_S16_NE] = zero_16,
[SA_PCM_FORMAT_S32_NE] = zero_32,
[SA_PCM_FORMAT_FLOAT32_NE] = zero_32
};
sa_assert(f < _SA_PCM_FORMAT_MAX);
return funcs[f];
}
|