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
156
157
158
159
160
161
|
#include <stdio.h>
#include <string.h>
#include "../include/asoundlib.h"
#define BUFFER_SIZE 800000
static char *xitoa(int aaa)
{
static char str[12];
sprintf(str, "%i", aaa);
return str;
}
void setformat(void *phandle, void *rhandle)
{
int err;
snd_pcm_format_t format;
bzero(&format, sizeof(format));
format.sfmt = SND_PCM_FORMAT_S16_LE;
format.channels = 2;
format.rate = 22050;
if ((err = snd_pcm_playback_format(phandle, &format)) < 0) {
printf("Playback format error: %s\n", snd_strerror(err));
}
if ((err = snd_pcm_capture_format(rhandle, &format)) < 0) {
printf("Record format error: %s\n", snd_strerror(err));
}
}
void method1(void)
{
snd_pcm_t *phandle, *rhandle;
char buffer[BUFFER_SIZE];
int err;
if ((err = snd_pcm_open(&phandle, 0, 0, SND_PCM_OPEN_PLAYBACK)) < 0) {
printf("Playback open error: %s\n", snd_strerror(err));
return;
}
if ((err = snd_pcm_open(&rhandle, 0, 0, SND_PCM_OPEN_CAPTURE)) < 0) {
printf("Record open error: %s\n", snd_strerror(err));
return;
}
setformat(phandle, rhandle);
printf("Recording... ");
fflush(stdout);
if ((err = snd_pcm_readi(rhandle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Read error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
printf("Playback... ");
fflush(stdout);
if ((err = snd_pcm_writei(phandle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Write error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
snd_pcm_close(phandle);
printf("Playback close...\n");
snd_pcm_close(rhandle);
printf("Record close...\n");
}
void method2(void)
{
snd_pcm_t *phandle, *rhandle;
char buffer[BUFFER_SIZE];
int err;
if ((err = snd_pcm_open(&phandle, 0, 0, SND_PCM_OPEN_PLAYBACK)) < 0) {
printf("Playback open error: %s\n", snd_strerror(err));
return;
}
if ((err = snd_pcm_open(&rhandle, 0, 0, SND_PCM_OPEN_CAPTURE)) < 0) {
printf("Record open error: %s\n", snd_strerror(err));
return;
}
setformat(phandle, rhandle);
printf("Recording... ");
fflush(stdout);
if ((err = snd_pcm_readi(rhandle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Read error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
if ((err = snd_pcm_drain_capture(rhandle)) < 0) {
printf("Record drain error: %s\n", snd_strerror(err));
return;
}
printf("Record drain done...\n");
printf("Playback... ");
fflush(stdout);
if ((err = snd_pcm_writei(phandle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Write error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
if ((err = snd_pcm_drain_playback(phandle)) < 0) {
printf("Playback drain error: %s\n", snd_strerror(err));
return;
}
printf("Playback drain done...\n");
snd_pcm_close(phandle);
printf("Playback close...\n");
snd_pcm_close(rhandle);
printf("Record close...\n");
}
void method3(void)
{
snd_pcm_t *handle;
char buffer[BUFFER_SIZE];
int err;
if ((err = snd_pcm_open(&handle, 0, 0, SND_PCM_OPEN_DUPLEX)) < 0) {
printf("Duplex open error: %s\n", snd_strerror(err));
return;
}
setformat(handle, handle);
printf("Recording... ");
fflush(stdout);
if ((err = snd_pcm_readi(handle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Read error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
if ((err = snd_pcm_drain_capture(handle)) < 0) {
printf("Record drain error: %s\n", snd_strerror(err));
return;
}
printf("Record drain done...\n");
printf("Playback... ");
fflush(stdout);
if ((err = snd_pcm_writei(handle, buffer, sizeof(buffer))) != sizeof(buffer)) {
printf("Write error: %s\n", err < 0 ? snd_strerror(err) : xitoa(err));
return;
}
printf("done...\n");
if ((err = snd_pcm_drain_playback(handle)) < 0) {
printf("Playback drain error: %s\n", snd_strerror(err));
return;
}
printf("Playback drain done...\n");
snd_pcm_close(handle);
printf("Close...\n");
}
int main(void)
{
printf(">>>>> METHOD 1\n");
method1();
printf(">>>>> METHOD 2\n");
method2();
printf(">>>>> METHOD 3\n");
method3();
return 0;
}
|
