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/* $OpenBSD: audiovar.h,v 1.1 1997/10/07 11:04:59 niklas Exp $ */
/* $NetBSD: audiovar.h,v 1.16 1997/08/19 23:49:58 augustss 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.
*
* From: Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp (LBL)
*/
/*
* Initial/default block duration is both configurable and patchable.
*/
#ifndef AUDIO_BLK_MS
#define AUDIO_BLK_MS 50 /* 50 ms */
#endif
#ifndef AU_RING_SIZE
#define AU_RING_SIZE 65536
#endif
#define AUMINBUF 512
#define AUMINBLK 32
#define AUMINNOBLK 3
struct audio_ringbuffer {
int bufsize; /* allocated memory */
int blksize; /* I/O block size */
int maxblks; /* no of blocks in ring */
u_char *start; /* start of buffer area */
u_char *end; /* end of buffer area */
u_char *inp; /* input pointer (to buffer) */
u_char *outp; /* output pointer (from buffer) */
int used; /* no of used bytes */
int usedlow; /* start writer when used falls below this */
int usedhigh; /* stop writer when used goes above this */
u_long stamp; /* bytes transferred */
u_long stamp_last; /* old value of bytes transferred */
u_long drops; /* missed samples from over/underrun */
u_long pdrops; /* paused samples */
char pause; /* transfer is paused */
char copying; /* data is being copied */
char needfill; /* buffer needs filling when copying is done */
char mmapped; /* device is mmap()-ed */
};
/*
* Software state, per audio device.
*/
struct audio_softc {
struct device dev;
void *hw_hdl; /* Hardware driver handle */
struct audio_hw_if *hw_if; /* Hardware interface */
struct device *sc_dev; /* Hardware device struct */
u_char sc_open; /* single use device */
#define AUOPEN_READ 0x01
#define AUOPEN_WRITE 0x02
u_char sc_mode; /* bitmask for RECORD/PLAY */
struct selinfo sc_wsel; /* write selector */
struct selinfo sc_rsel; /* read selector */
struct proc *sc_async_audio; /* process who wants audio SIGIO */
struct mixer_asyncs {
struct mixer_asyncs *next;
struct proc *proc;
} *sc_async_mixer; /* processes who want mixer SIGIO */
/* Sleep channels for reading and writing. */
int sc_rchan;
int sc_wchan;
/* Ring buffers, separate for record and play. */
struct audio_ringbuffer sc_rr; /* Record ring */
struct audio_ringbuffer sc_pr; /* Play ring */
u_char sc_blkset; /* Blocksize has been set */
u_char *sc_sil_start; /* start of silence in buffer */
int sc_sil_count; /* # of silence bytes */
u_char sc_rbus; /* input dma in progress */
u_char sc_pbus; /* output dma in progress */
struct audio_params sc_pparams; /* play encoding parameters */
struct audio_params sc_rparams; /* record encoding parameters */
int sc_eof; /* EOF, i.e. zero sixed write, counter */
u_long sc_wstamp;
u_long sc_playdrop;
int sc_full_duplex; /* device in full duplex mode */
#ifdef AUDIO_INTR_TIME
u_long sc_pfirstintr; /* first time we saw a xmit interrupt */
int sc_pnintr; /* number of interrupts */
u_long sc_plastintr; /* last time we saw a xmit interrupt */
long sc_pblktime; /* nominal time between interrupts */
u_long sc_rfirstintr; /* first time we saw a rec interrupt */
int sc_rnintr; /* number of interrupts */
u_long sc_rlastintr; /* last time we saw a xrec interrupt */
long sc_rblktime; /* nominal time between interrupts */
#endif
};
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