76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
/* $NetBSD: bsd_audiovar.h,v 1.2 1994/10/27 04:16:53 cgd Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1991-1993 Regents of the University of California.
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the Computer Systems
|
|
* Engineering Group at Lawrence Berkeley Laboratory.
|
|
* 4. Neither the name of the University nor of the Laboratory may be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*
|
|
* Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp (LBL)
|
|
*/
|
|
|
|
#define AUCB_SIZE 4096
|
|
#define AUCB_MOD(k) ((k) & (AUCB_SIZE - 1))
|
|
|
|
#define AUCB_INIT(cb) ((cb)->cb_head = (cb)->cb_tail = (cb)->cb_drops = \
|
|
(cb)->cb_pdrops = (cb)->cb_tdrops = (cb)->cb_cc = 0)
|
|
|
|
#define AUCB_EMPTY(cb) ((cb)->cb_head == (cb)->cb_tail)
|
|
#define AUCB_FULL(cb) (AUCB_MOD((cb)->cb_tail + 1) == (cb)->cb_head)
|
|
#define AUCB_LEN(cb) (AUCB_MOD((cb)->cb_tail - (cb)->cb_head))
|
|
|
|
#define MAXBLKSIZE (AUCB_SIZE / 2)
|
|
#define DEFBLKSIZE 128
|
|
|
|
#ifndef LOCORE
|
|
/*
|
|
* aucb's are used for communication between the trap handler and
|
|
* the software interrupt.
|
|
*/
|
|
struct aucb {
|
|
int cb_thresh; /* threshold for wakeup */
|
|
u_char *cb_cp;
|
|
u_char *cb_bp;
|
|
u_char *cb_ep;
|
|
};
|
|
|
|
struct auio {
|
|
u_long au_stamp; /* time stamp */
|
|
int au_lowat; /* xmit low water mark (for wakeup) */
|
|
int au_hiwat; /* xmit high water mark (for wakeup) */
|
|
int au_blksize; /* recv block (chunk) size */
|
|
int au_backlog; /* # samples of xmit backlog to gen. */
|
|
#ifdef notdef
|
|
struct aucb au_rb; /* read (recv) buffer */
|
|
struct aucb au_wb; /* write (xmit) buffer */
|
|
#endif
|
|
struct aucb au_cb;
|
|
};
|
|
#endif
|