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/*-
* Copyright (c) 2001 Cameron Grant <cg@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
int vchan_create(struct pcm_channel *parent, int num);
int vchan_destroy(struct pcm_channel *c);
int vchan_initsys(device_t dev);
/*
* Default speed / format
*/
#define VCHAN_DEFAULT_SPEED 48000
#define VCHAN_DEFAULT_AFMT (AFMT_S16_LE | AFMT_STEREO)
#define VCHAN_DEFAULT_STRFMT "s16le"
#define VCHAN_PLAY 0
#define VCHAN_REC 1
/*
* Offset by +/- 1 so we can distinguish bogus pointer.
*/
#define VCHAN_SYSCTL_DATA(x, y) \
((void *)((intptr_t)(((((x) + 1) & 0xfff) << 2) | \
(((VCHAN_##y) + 1) & 0x3))))
#define VCHAN_SYSCTL_DATA_SIZE sizeof(void *)
#define VCHAN_SYSCTL_UNIT(x) ((int)(((intptr_t)(x) >> 2) & 0xfff) - 1)
#define VCHAN_SYSCTL_DIR(x) ((int)((intptr_t)(x) & 0x3) - 1)
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