1 /*-
2 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
3 * Copyright (c) 2001 Cameron Grant <cg@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: releng/10.3/sys/dev/sound/pcm/vchan.h 193640 2009-06-07 19:12:08Z ariff $
28 */
29
30 #ifndef _SND_VCHAN_H_
31 #define _SND_VCHAN_H_
32
33 int vchan_create(struct pcm_channel *, int);
34 int vchan_destroy(struct pcm_channel *);
35
36 #ifdef SND_DEBUG
37 int vchan_passthrough(struct pcm_channel *, const char *);
38 #define vchan_sync(c) vchan_passthrough(c, __func__)
39 #else
40 int vchan_sync(struct pcm_channel *);
41 #endif
42
43 #define VCHAN_SYNC_REQUIRED(c) \
44 (((c)->flags & CHN_F_VIRTUAL) && (((c)->flags & CHN_F_DIRTY) || \
45 sndbuf_getfmt((c)->bufhard) != (c)->parentchannel->format || \
46 sndbuf_getspd((c)->bufhard) != (c)->parentchannel->speed))
47
48 void vchan_initsys(device_t);
49
50 /*
51 * Default format / rate
52 */
53 #define VCHAN_DEFAULT_FORMAT SND_FORMAT(AFMT_S16_LE, 2, 0)
54 #define VCHAN_DEFAULT_RATE 48000
55
56 #define VCHAN_PLAY 0
57 #define VCHAN_REC 1
58
59 /*
60 * Offset by +/- 1 so we can distinguish bogus pointer.
61 */
62 #define VCHAN_SYSCTL_DATA(x, y) \
63 ((void *)((intptr_t)(((((x) + 1) & 0xfff) << 2) | \
64 (((VCHAN_##y) + 1) & 0x3))))
65
66 #define VCHAN_SYSCTL_DATA_SIZE sizeof(void *)
67 #define VCHAN_SYSCTL_UNIT(x) ((int)(((intptr_t)(x) >> 2) & 0xfff) - 1)
68 #define VCHAN_SYSCTL_DIR(x) ((int)((intptr_t)(x) & 0x3) - 1)
69
70 #endif /* _SND_VCHAN_H_ */
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