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
|
#include <u.h>
#include <libc.h>
ulong
get4(void)
{
uchar buf[4];
if(readn(0, buf, 4) != 4)
sysfatal("read: %r");
return buf[0]<<24 | buf[1]<<16 | buf[2]<<8 | buf[3];
}
char *fmttab[] = {
[1] "µ8", /* 8-bit G.711 µ-law */
[2] "S8", /* 8-bit linear PCM */
[3] "S16", /* 16-bit linear PCM */
[4] "S24", /* 24-bit linear PCM */
[5] "S32", /* 32-bit linear PCM */
[6] "f32", /* 32-bit IEEE floating point */
[7] "f64", /* 64-bit IEEE floating point */
[27] "a8", /* 8-bit G.711 A-law */
};
void
main(int, char *argv[])
{
char buf[64], fmt[32];
ulong enc, rate, chans, len, off;
int n;
argv0 = argv[0];
if(get4() != 0x2e736e64UL)
sysfatal("no sun format");
off = get4();
if(off < 24)
sysfatal("bad data ofset");
off -= 24;
len = get4();
if(len == 0xffffffffUL)
len = 0;
enc = get4();
rate = get4();
chans = get4();
if(enc >= nelem(fmttab) || fmttab[enc] == 0)
sysfatal("unsupported encoding: %lux", enc);
snprint(fmt, sizeof(fmt), "%sc%ludr%lud", fmttab[enc], chans, rate);
while(off > 0){
n = sizeof(buf);
if(off < n)
n = off;
n = read(0, buf, n);
if(n <= 0)
sysfatal("read: %r");
off -= n;
}
if(len > 0){
snprint(buf, sizeof(buf), "%lud", len);
execl("/bin/audio/pcmconv", "pcmconv", "-i", fmt, "-l", buf, 0);
} else
execl("/bin/audio/pcmconv", "pcmconv", "-i", fmt, 0);
}
|
