3f787778b2
both should work with both old- and new-config i386 trees. Some notes: bsd_audio.c has dependencies on the soundblaster. This should be fixed, so that it can be used for the PC speaker (when its driver has been modified), as well. sb.c needs some cleanup, and will have sections trimmed, eventually (when new config becomse standard for i386). additionally, the SBPro support needs some cleanup.
75 lines
3.0 KiB
C
75 lines
3.0 KiB
C
/*
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* Copyright (c) 1991-1993 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp (LBL)
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* $Id: bsd_audiovar.h,v 1.1 1994/01/09 19:35:05 cgd Exp $
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*/
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#define AUCB_SIZE 4096
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#define AUCB_MOD(k) ((k) & (AUCB_SIZE - 1))
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#define AUCB_INIT(cb) ((cb)->cb_head = (cb)->cb_tail = (cb)->cb_drops = \
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(cb)->cb_pdrops = (cb)->cb_tdrops = (cb)->cb_cc = 0)
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#define AUCB_EMPTY(cb) ((cb)->cb_head == (cb)->cb_tail)
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#define AUCB_FULL(cb) (AUCB_MOD((cb)->cb_tail + 1) == (cb)->cb_head)
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#define AUCB_LEN(cb) (AUCB_MOD((cb)->cb_tail - (cb)->cb_head))
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#define MAXBLKSIZE (AUCB_SIZE / 2)
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#define DEFBLKSIZE 128
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#ifndef LOCORE
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/*
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* aucb's are used for communication between the trap handler and
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* the software interrupt.
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*/
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struct aucb {
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int cb_thresh; /* threshold for wakeup */
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u_char *cb_cp;
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u_char *cb_bp;
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u_char *cb_ep;
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};
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struct auio {
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u_long au_stamp; /* time stamp */
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int au_lowat; /* xmit low water mark (for wakeup) */
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int au_hiwat; /* xmit high water mark (for wakeup) */
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int au_blksize; /* recv block (chunk) size */
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int au_backlog; /* # samples of xmit backlog to gen. */
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#ifdef notdef
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struct aucb au_rb; /* read (recv) buffer */
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struct aucb au_wb; /* write (xmit) buffer */
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#endif
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struct aucb au_cb;
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};
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#endif
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