2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org>
5 * Copyright (c) 2001 Cameron Grant <cg@FreeBSD.org>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 int vchan_create(struct pcm_channel *, int);
36 int vchan_destroy(struct pcm_channel *);
39 int vchan_passthrough(struct pcm_channel *, const char *);
40 #define vchan_sync(c) vchan_passthrough(c, __func__)
42 int vchan_sync(struct pcm_channel *);
45 #define VCHAN_SYNC_REQUIRED(c) \
46 (((c)->flags & CHN_F_VIRTUAL) && (((c)->flags & CHN_F_DIRTY) || \
47 sndbuf_getfmt((c)->bufhard) != (c)->parentchannel->format || \
48 sndbuf_getspd((c)->bufhard) != (c)->parentchannel->speed))
50 void vchan_initsys(device_t);
53 * Default format / rate
55 #define VCHAN_DEFAULT_FORMAT SND_FORMAT(AFMT_S16_LE, 2, 0)
56 #define VCHAN_DEFAULT_RATE 48000
62 * Offset by +/- 1 so we can distinguish bogus pointer.
64 #define VCHAN_SYSCTL_DATA(x, y) \
65 ((void *)((intptr_t)(((((x) + 1) & 0xfff) << 2) | \
66 (((VCHAN_##y) + 1) & 0x3))))
68 #define VCHAN_SYSCTL_DATA_SIZE sizeof(void *)
69 #define VCHAN_SYSCTL_UNIT(x) ((int)(((intptr_t)(x) >> 2) & 0xfff) - 1)
70 #define VCHAN_SYSCTL_DIR(x) ((int)((intptr_t)(x) & 0x3) - 1)
72 #endif /* _SND_VCHAN_H_ */