FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/fake.c
1 /*
2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <dev/sound/pcm/sound.h>
28
29 SND_DECLARE_FILE("$FreeBSD: releng/5.2/sys/dev/sound/pcm/fake.c 119853 2003-09-07 16:28:03Z cg $");
30
31 static u_int32_t fk_fmt[] = {
32 AFMT_U8,
33 AFMT_STEREO | AFMT_U8,
34 AFMT_S8,
35 AFMT_STEREO | AFMT_S8,
36 AFMT_S16_LE,
37 AFMT_STEREO | AFMT_S16_LE,
38 AFMT_U16_LE,
39 AFMT_STEREO | AFMT_U16_LE,
40 AFMT_S16_BE,
41 AFMT_STEREO | AFMT_S16_BE,
42 AFMT_U16_BE,
43 AFMT_STEREO | AFMT_U16_BE,
44 0
45 };
46 static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
47
48 #define FKBUFSZ 4096
49 static char fakebuf[FKBUFSZ];
50
51 /* channel interface */
52 static void *
53 fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
54 {
55 sndbuf_setup(b, fakebuf, FKBUFSZ);
56 return (void *)0xbabef00d;
57 }
58
59 static int
60 fkchan_free(kobj_t obj, void *data)
61 {
62 return 0;
63 }
64
65 static int
66 fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
67 {
68 return 0;
69 }
70
71 static int
72 fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
73 {
74 return speed;
75 }
76
77 static int
78 fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
79 {
80 return blocksize;
81 }
82
83 static int
84 fkchan_trigger(kobj_t obj, void *data, int go)
85 {
86 return 0;
87 }
88
89 static int
90 fkchan_getptr(kobj_t obj, void *data)
91 {
92 return 0;
93 }
94
95 static struct pcmchan_caps *
96 fkchan_getcaps(kobj_t obj, void *data)
97 {
98 return &fk_caps;
99 }
100
101 static kobj_method_t fkchan_methods[] = {
102 KOBJMETHOD(channel_init, fkchan_init),
103 KOBJMETHOD(channel_free, fkchan_free),
104 KOBJMETHOD(channel_setformat, fkchan_setformat),
105 KOBJMETHOD(channel_setspeed, fkchan_setspeed),
106 KOBJMETHOD(channel_setblocksize, fkchan_setblocksize),
107 KOBJMETHOD(channel_trigger, fkchan_trigger),
108 KOBJMETHOD(channel_getptr, fkchan_getptr),
109 KOBJMETHOD(channel_getcaps, fkchan_getcaps),
110 { 0, 0 }
111 };
112 CHANNEL_DECLARE(fkchan);
113
114 struct pcm_channel *
115 fkchan_setup(device_t dev)
116 {
117 struct snddev_info *d = device_get_softc(dev);
118 struct pcm_channel *c;
119
120 c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK);
121 c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
122 c->parentsnddev = d;
123 snprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
124
125 return c;
126 }
127
128 int
129 fkchan_kill(struct pcm_channel *c)
130 {
131 kobj_delete(c->methods, M_DEVBUF);
132 c->methods = NULL;
133 free(c, M_DEVBUF);
134 return 0;
135 }
136
137
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