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/6.1/sys/dev/sound/pcm/fake.c 153901 2005-12-30 19:55:55Z netchild $");
30
31 static u_int32_t fk_fmt[] = {
32 AFMT_MU_LAW,
33 AFMT_STEREO | AFMT_MU_LAW,
34 AFMT_A_LAW,
35 AFMT_STEREO | AFMT_A_LAW,
36 AFMT_U8,
37 AFMT_STEREO | AFMT_U8,
38 AFMT_S8,
39 AFMT_STEREO | AFMT_S8,
40 AFMT_S16_LE,
41 AFMT_STEREO | AFMT_S16_LE,
42 AFMT_U16_LE,
43 AFMT_STEREO | AFMT_U16_LE,
44 AFMT_S16_BE,
45 AFMT_STEREO | AFMT_S16_BE,
46 AFMT_U16_BE,
47 AFMT_STEREO | AFMT_U16_BE,
48 AFMT_S24_LE,
49 AFMT_STEREO | AFMT_S24_LE,
50 AFMT_U24_LE,
51 AFMT_STEREO | AFMT_U24_LE,
52 AFMT_S24_BE,
53 AFMT_STEREO | AFMT_S24_BE,
54 AFMT_U24_BE,
55 AFMT_STEREO | AFMT_U24_BE,
56 AFMT_S32_LE,
57 AFMT_STEREO | AFMT_S32_LE,
58 AFMT_U32_LE,
59 AFMT_STEREO | AFMT_U32_LE,
60 AFMT_S32_BE,
61 AFMT_STEREO | AFMT_S32_BE,
62 AFMT_U32_BE,
63 AFMT_STEREO | AFMT_U32_BE,
64 0
65 };
66 static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
67
68 #define FKBUFSZ 4096
69 static char fakebuf[FKBUFSZ];
70
71 /* channel interface */
72 static void *
73 fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
74 {
75 sndbuf_setup(b, fakebuf, FKBUFSZ);
76 return (void *)0xbabef00d;
77 }
78
79 static int
80 fkchan_free(kobj_t obj, void *data)
81 {
82 return 0;
83 }
84
85 static int
86 fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
87 {
88 return 0;
89 }
90
91 static int
92 fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
93 {
94 return speed;
95 }
96
97 static int
98 fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
99 {
100 return blocksize;
101 }
102
103 static int
104 fkchan_trigger(kobj_t obj, void *data, int go)
105 {
106 return 0;
107 }
108
109 static int
110 fkchan_getptr(kobj_t obj, void *data)
111 {
112 return 0;
113 }
114
115 static struct pcmchan_caps *
116 fkchan_getcaps(kobj_t obj, void *data)
117 {
118 return &fk_caps;
119 }
120
121 static kobj_method_t fkchan_methods[] = {
122 KOBJMETHOD(channel_init, fkchan_init),
123 KOBJMETHOD(channel_free, fkchan_free),
124 KOBJMETHOD(channel_setformat, fkchan_setformat),
125 KOBJMETHOD(channel_setspeed, fkchan_setspeed),
126 KOBJMETHOD(channel_setblocksize, fkchan_setblocksize),
127 KOBJMETHOD(channel_trigger, fkchan_trigger),
128 KOBJMETHOD(channel_getptr, fkchan_getptr),
129 KOBJMETHOD(channel_getcaps, fkchan_getcaps),
130 { 0, 0 }
131 };
132 CHANNEL_DECLARE(fkchan);
133
134 struct pcm_channel *
135 fkchan_setup(device_t dev)
136 {
137 struct snddev_info *d = device_get_softc(dev);
138 struct pcm_channel *c;
139
140 c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK);
141 c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
142 c->parentsnddev = d;
143 /*
144 * Fake channel is such a blessing in disguise. Using this,
145 * we can keep track prefered virtual channel speed without
146 * querying kernel hint repetitively (see vchan_create / vchan.c).
147 */
148 c->speed = 0;
149 snprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
150
151 return c;
152 }
153
154 int
155 fkchan_kill(struct pcm_channel *c)
156 {
157 kobj_delete(c->methods, M_DEVBUF);
158 c->methods = NULL;
159 free(c, M_DEVBUF);
160 return 0;
161 }
162
163
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