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
|
#include <errno.h>
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include "sydney.h"
#include "macro.h"
#define ASSERT_SUCCESS(x) do { \
int _r; \
if ((_r = x)) { \
fprintf(stderr, "Operation <%s> failed: %s%s%s\n", \
#x, \
sa_strerror(_r), \
_r == SA_ERROR_SYSTEM ? "; " : "", _r == SA_ERROR_SYSTEM ? strerror(errno) : ""); \
} \
assert(_r == SA_SUCCESS); \
} while(0)
#define FREQ 440
static const float data[4] = { 0.0, 1.0, 0.0, -1.0 };
static int callback(sa_stream_t *s, sa_event_t e) {
switch (e) {
case SA_EVENT_INIT_THREAD:
printf("Thread initialized.\n");
return 0;
case SA_EVENT_ERROR: {
int e;
ASSERT_SUCCESS(sa_stream_get_event_error(s, &e));
printf("Error: %s\n", sa_strerror(e));
return -1;
}
case SA_EVENT_NOTIFY:
printf("Notified.\n");
return 0;
case SA_EVENT_REQUEST_IO:
ASSERT_SUCCESS(sa_stream_write(s, data, sizeof(data)));
return 0;
case _SA_EVENT_MAX:
;
}
sa_assert_not_reached();
}
int main(int argc, char *argv[]) {
sa_stream_t *s;
ASSERT_SUCCESS(sa_stream_create_pcm(&s, "Sine Test (pull)", SA_MODE_WRONLY, SA_PCM_FORMAT_FLOAT32_NE, FREQ * 4, 1));
ASSERT_SUCCESS(sa_stream_change_device(s, "/dev/dsp1"));
ASSERT_SUCCESS(sa_stream_open(s));
ASSERT_SUCCESS(sa_stream_start_thread(s, callback));
sleep(20);
ASSERT_SUCCESS(sa_stream_stop_thread(s));
ASSERT_SUCCESS(sa_stream_drain(s));
ASSERT_SUCCESS(sa_stream_destroy(s));
return 0;
}
|