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: releng/5.4/sys/dev/sound/pcm/feeder.h 141016 2005-01-30 01:00:13Z imp $
27 */
28
29 struct pcm_feederdesc {
30 u_int32_t type;
31 u_int32_t in, out;
32 u_int32_t flags;
33 int idx;
34 };
35
36 struct feeder_class {
37 KOBJ_CLASS_FIELDS;
38 int align;
39 struct pcm_feederdesc *desc;
40 void *data;
41 };
42
43 struct pcm_feeder {
44 KOBJ_FIELDS;
45 int align;
46 struct pcm_feederdesc *desc, desc_static;
47 void *data;
48 struct feeder_class *class;
49 struct pcm_feeder *source, *parent;
50
51 };
52
53 void feeder_register(void *p);
54 struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
55
56 u_int32_t chn_fmtchain(struct pcm_channel *c, u_int32_t *to);
57 int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
58 int chn_removefeeder(struct pcm_channel *c);
59 struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
60 void feeder_printchain(struct pcm_feeder *head);
61
62 #define FEEDER_DECLARE(feeder, palign, pdata) \
63 static struct feeder_class feeder ## _class = { \
64 .name = #feeder, \
65 .methods = feeder ## _methods, \
66 .size = sizeof(struct pcm_feeder), \
67 .align = palign, \
68 .desc = feeder ## _desc, \
69 .data = pdata, \
70 }; \
71 SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder ## _class);
72
73 #define FEEDER_ROOT 1
74 #define FEEDER_FMT 2
75 #define FEEDER_MIXER 3
76 #define FEEDER_RATE 4
77 #define FEEDER_FILTER 5
78 #define FEEDER_VOLUME 6
79 #define FEEDER_LAST FEEDER_VOLUME
80
81 #define FEEDRATE_SRC 1
82 #define FEEDRATE_DST 2
83
84
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