feeder.h revision 117307 
1/*
2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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: head/sys/dev/sound/pcm/feeder.h 117307 2003-07-07 17:40:02Z cg $
27 */
28
29struct pcm_feederdesc {
30	u_int32_t type;
31	u_int32_t in, out;
32	u_int32_t flags;
33	int idx;
34};
35
36struct feeder_class {
37	KOBJ_CLASS_FIELDS;
38	int align;
39	struct pcm_feederdesc *desc;
40	void *data;
41};
42
43struct 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
53void feeder_register(void *p);
54struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
55
56u_int32_t chn_fmtchain(struct pcm_channel *c, u_int32_t *to);
57int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
58int chn_removefeeder(struct pcm_channel *c);
59struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
60void feeder_printchain(struct pcm_feeder *head);
61
62#define FEEDER_DECLARE(feeder, palign, pdata) \
63static 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}; \
71SYSINIT(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
85