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
162
163
164
165
166
167
|
/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "oss-util.h"
#include "util.h"
#include "log.h"
int pa_oss_open(const char *device, int *mode, int* pcaps) {
int fd = -1;
assert(device && mode && (*mode == O_RDWR || *mode == O_RDONLY || *mode == O_WRONLY));
if (*mode == O_RDWR) {
if ((fd = open(device, O_RDWR|O_NDELAY)) >= 0) {
int dcaps, *tcaps;
ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
tcaps = pcaps ? pcaps : &dcaps;
if (ioctl(fd, SNDCTL_DSP_GETCAPS, tcaps) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
goto fail;
}
if (*tcaps & DSP_CAP_DUPLEX)
return fd;
close(fd);
}
if ((fd = open(device, (*mode = O_WRONLY)|O_NDELAY)) < 0) {
if ((fd = open(device, (*mode = O_RDONLY)|O_NDELAY)) < 0) {
pa_log(__FILE__": open('%s'): %s\n", device, strerror(errno));
goto fail;
}
}
} else {
if ((fd = open(device, *mode|O_NDELAY)) < 0) {
pa_log(__FILE__": open('%s'): %s\n", device, strerror(errno));
goto fail;
}
}
if (pcaps) {
if (ioctl(fd, SNDCTL_DSP_GETCAPS, pcaps) < 0) {
pa_log(__FILE__": SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
goto fail;
}
}
pa_fd_set_cloexec(fd, 1);
return fd;
fail:
if (fd >= 0)
close(fd);
return fd;
}
int pa_oss_auto_format(int fd, struct pa_sample_spec *ss) {
int format, channels, speed, reqformat;
static const int format_trans[] = {
[PA_SAMPLE_U8] = AFMT_U8,
[PA_SAMPLE_ALAW] = AFMT_A_LAW,
[PA_SAMPLE_ULAW] = AFMT_MU_LAW,
[PA_SAMPLE_S16LE] = AFMT_S16_LE,
[PA_SAMPLE_S16BE] = AFMT_S16_BE,
[PA_SAMPLE_FLOAT32LE] = AFMT_QUERY, /* not supported */
[PA_SAMPLE_FLOAT32BE] = AFMT_QUERY, /* not supported */
};
assert(fd >= 0 && ss);
reqformat = format = format_trans[ss->format];
if (reqformat == AFMT_QUERY || ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != reqformat) {
format = AFMT_S16_NE;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
format = f;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
format = AFMT_U8;
if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
pa_log(__FILE__": SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
return -1;
} else
ss->format = PA_SAMPLE_U8;
} else
ss->format = f == AFMT_S16_LE ? PA_SAMPLE_S16LE : PA_SAMPLE_S16BE;
} else
ss->format = PA_SAMPLE_S16NE;
}
channels = ss->channels;
if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
pa_log(__FILE__": SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
return -1;
}
assert(channels);
ss->channels = channels;
speed = ss->rate;
if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
pa_log(__FILE__": SNDCTL_DSP_SPEED: %s\n", strerror(errno));
return -1;
}
assert(speed);
ss->rate = speed;
return 0;
}
static int simple_log2(int v) {
int k = 0;
for (;;) {
v >>= 1;
if (!v) break;
k++;
}
return k;
}
int pa_oss_set_fragments(int fd, int nfrags, int frag_size) {
int arg;
arg = ((int) nfrags << 16) | simple_log2(frag_size);
if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &arg) < 0) {
pa_log(__FILE__": SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
return -1;
}
return 0;
}
|