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 * $FreeBSD$
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_fmtscore(u_int32_t fmt);
57 u_int32_t chn_fmtbestbit(u_int32_t fmt, u_int32_t *fmts);
58 u_int32_t chn_fmtbeststereo(u_int32_t fmt, u_int32_t *fmts);
59 u_int32_t chn_fmtbest(u_int32_t fmt, u_int32_t *fmts);
60 u_int32_t chn_fmtchain(struct pcm_channel *c, u_int32_t *to);
61 int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
62 int chn_removefeeder(struct pcm_channel *c);
63 struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
64 void feeder_printchain(struct pcm_feeder *head);
65
66 #define FEEDER_DECLARE(feeder, palign, pdata) \
67 static struct feeder_class feeder ## _class = { \
68 .name = #feeder, \
69 .methods = feeder ## _methods, \
70 .size = sizeof(struct pcm_feeder), \
71 .align = palign, \
72 .desc = feeder ## _desc, \
73 .data = pdata, \
74 }; \
75 SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_ANY, feeder_register, &feeder ## _class);
76
77 #define FEEDER_ROOT 0
78 #define FEEDER_FMT 1
79 #define FEEDER_MIXER 2
80 #define FEEDER_RATE 3
81 #define FEEDER_FILTER 4
82 #define FEEDER_VOLUME 5
83 #define FEEDER_SWAPLR 6
84 #define FEEDER_LAST 32
85
86 #define FEEDRATE_SRC 1
87 #define FEEDRATE_DST 2
88
89 #define FEEDRATE_RATEMIN 1
90 #define FEEDRATE_RATEMAX 2016000 /* 48000 * 42 */
91
92 #define FEEDRATE_MIN 1
93 #define FEEDRATE_MAX 0x7fffff /* sign 24bit ~ 8ghz ! */
94
95 #define FEEDRATE_ROUNDHZ 25
96 #define FEEDRATE_ROUNDHZ_MIN 0
97 #define FEEDRATE_ROUNDHZ_MAX 500
98
99 /*
100 * Default buffer size for feeder processing.
101 *
102 * Big = less sndbuf_feed(), more memory usage.
103 * Small = aggresive sndbuf_feed() (perhaps too much), less memory usage.
104 */
105 #define FEEDBUFSZ 16384
106 #define FEEDBUFSZ_MIN 2048
107 #define FEEDBUFSZ_MAX 131072
108
109 extern int feeder_rate_min;
110 extern int feeder_rate_max;
111 extern int feeder_rate_round;
112 extern int feeder_buffersize;
Cache object: 84c44f3f08ba7f6a0573451598bc729a
|