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

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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 70134 2000-12-18 01:36:41Z cg $
27 */
28
29struct feeder_class {
30 KOBJ_CLASS_FIELDS;
31 int align;
32 struct pcm_feederdesc *desc;
33 void *data;
34};
35
36void feeder_register(void *p);
37struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
38
39u_int32_t chn_fmtchain(pcm_channel *c, u_int32_t *to);
40int chn_addfeeder(pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
41int chn_removefeeder(pcm_channel *c);
42pcm_feeder *chn_findfeeder(pcm_channel *c, u_int32_t type);
43
44#define FEEDER_DECLARE(feeder, palign, pdata) \
45static struct feeder_class feeder ## _class = { \
46 name: #feeder, \
47 methods: feeder ## _methods, \
48 size: sizeof(pcm_feeder), \
49 align: palign, \
50 desc: feeder ## _desc, \
51 data: pdata, \
52}; \
53SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder ## _class);
54
55#define FEEDER_ROOT 1
56#define FEEDER_FMT 2
57#define FEEDER_RATE 3
58#define FEEDER_FILTER 4
59#define FEEDER_VOLUME 5
60#define FEEDER_LAST FEEDER_VOLUME
61
62#define FEEDRATE_SRC 1
63#define FEEDRATE_DST 2
64
65