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 * $FreeBSD: src/sys/dev/sound/pcm/fake.c,v 1.14.2.1 2005/12/30 19:55:54 netchild Exp $
27 */
28
29 #include <dev/sound/pcm/sound.h>
30
31
32 static u_int32_t fk_fmt[] = {
33 AFMT_MU_LAW,
34 AFMT_STEREO | AFMT_MU_LAW,
35 AFMT_A_LAW,
36 AFMT_STEREO | AFMT_A_LAW,
37 AFMT_U8,
38 AFMT_STEREO | AFMT_U8,
39 AFMT_S8,
40 AFMT_STEREO | AFMT_S8,
41 AFMT_S16_LE,
42 AFMT_STEREO | AFMT_S16_LE,
43 AFMT_U16_LE,
44 AFMT_STEREO | AFMT_U16_LE,
45 AFMT_S16_BE,
46 AFMT_STEREO | AFMT_S16_BE,
47 AFMT_U16_BE,
48 AFMT_STEREO | AFMT_U16_BE,
49 AFMT_S24_LE,
50 AFMT_STEREO | AFMT_S24_LE,
51 AFMT_U24_LE,
52 AFMT_STEREO | AFMT_U24_LE,
53 AFMT_S24_BE,
54 AFMT_STEREO | AFMT_S24_BE,
55 AFMT_U24_BE,
56 AFMT_STEREO | AFMT_U24_BE,
57 AFMT_S32_LE,
58 AFMT_STEREO | AFMT_S32_LE,
59 AFMT_U32_LE,
60 AFMT_STEREO | AFMT_U32_LE,
61 AFMT_S32_BE,
62 AFMT_STEREO | AFMT_S32_BE,
63 AFMT_U32_BE,
64 AFMT_STEREO | AFMT_U32_BE,
65 0
66 };
67 static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
68
69 #define FKBUFSZ 4096
70 static char fakebuf[FKBUFSZ];
71
72 /* channel interface */
73 static void *
74 fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
75 {
76 sndbuf_setup(b, fakebuf, FKBUFSZ);
77 return (void *)0xbabef00d;
78 }
79
80 static int
81 fkchan_free(kobj_t obj, void *data)
82 {
83 return 0;
84 }
85
86 static int
87 fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
88 {
89 return 0;
90 }
91
92 static int
93 fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
94 {
95 return speed;
96 }
97
98 static int
99 fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
100 {
101 return blocksize;
102 }
103
104 static int
105 fkchan_trigger(kobj_t obj, void *data, int go)
106 {
107 return 0;
108 }
109
110 static int
111 fkchan_getptr(kobj_t obj, void *data)
112 {
113 return 0;
114 }
115
116 static struct pcmchan_caps *
117 fkchan_getcaps(kobj_t obj, void *data)
118 {
119 return &fk_caps;
120 }
121
122 static kobj_method_t fkchan_methods[] = {
123 KOBJMETHOD(channel_init, fkchan_init),
124 KOBJMETHOD(channel_free, fkchan_free),
125 KOBJMETHOD(channel_setformat, fkchan_setformat),
126 KOBJMETHOD(channel_setspeed, fkchan_setspeed),
127 KOBJMETHOD(channel_setblocksize, fkchan_setblocksize),
128 KOBJMETHOD(channel_trigger, fkchan_trigger),
129 KOBJMETHOD(channel_getptr, fkchan_getptr),
130 KOBJMETHOD(channel_getcaps, fkchan_getcaps),
131 KOBJMETHOD_END
132 };
133 CHANNEL_DECLARE(fkchan);
134
135 struct pcm_channel *
136 fkchan_setup(device_t dev)
137 {
138 struct snddev_info *d = device_get_softc(dev);
139 struct pcm_channel *c;
140
141 c = kmalloc(sizeof(*c), M_DEVBUF, M_WAITOK);
142 c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
143 c->parentsnddev = d;
144 /*
145 * Fake channel is such a blessing in disguise. Using this,
146 * we can keep track prefered virtual channel speed without
147 * querying kernel hint repetitively (see vchan_create / vchan.c).
148 */
149 c->speed = 0;
150 ksnprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
151
152 return c;
153 }
154
155 int
156 fkchan_kill(struct pcm_channel *c)
157 {
158 kobj_delete(c->methods, M_DEVBUF);
159 c->methods = NULL;
160 kfree(c, M_DEVBUF);
161 return 0;
162 }
163
164
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