658656bb99
- Change the way attach and open works to allow multiple audio devices. - Split the mulaw.c file into two to avoid dragging in mulaw convertsion when they are not needed. Add 16 bit alaw/mulaw tables. - Change the way audio properties are gotten. - Recognize more versions os SoundBlaster.
123 lines
4.7 KiB
C
123 lines
4.7 KiB
C
/* $NetBSD: audiovar.h,v 1.13 1997/07/31 22:33:20 augustss Exp $ */
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/*
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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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*/
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/*
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* Initial/default block duration is both configurable and patchable.
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*/
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#ifndef AUDIO_BLK_MS
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#define AUDIO_BLK_MS 20 /* 20 ms */
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#endif
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#ifndef AU_RING_SIZE
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#define AU_RING_SIZE 65536
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#endif
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#define AUMINBUF 512
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#define AUMINBLK 32
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#define AUMINNOBLK 3
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struct audio_ringbuffer {
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int bufsize; /* allocated memory */
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int blksize; /* I/O block size */
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int maxblks; /* no of blocks in ring */
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u_char *start; /* start of buffer area */
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u_char *end; /* end of buffer area */
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u_char *inp; /* input pointer (to buffer) */
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u_char *outp; /* output pointer (from buffer) */
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int used; /* no of used bytes */
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int usedlow; /* start writer when used falls below this */
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int usedhigh; /* stop writer when used goes above this */
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u_long stamp; /* bytes transferred */
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u_long stamp_last; /* old value of bytes transferred */
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u_long drops; /* missed samples from over/underrun */
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u_long pdrops; /* paused samples */
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char pause; /* transfer is paused */
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char copying; /* data is being copied */
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char needfill; /* buffer needs filling when copying is done */
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char mmapped; /* device is mmap()-ed */
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};
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/*
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* Software state, per audio device.
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*/
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struct audio_softc {
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void *hw_hdl; /* Hardware driver handle */
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struct audio_hw_if *hw_if; /* Hardware interface */
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struct device *sc_dev; /* Hardware device struct */
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u_char sc_open; /* single use device */
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#define AUOPEN_READ 0x01
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#define AUOPEN_WRITE 0x02
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u_char sc_mode; /* bitmask for RECORD/PLAY */
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struct selinfo sc_wsel; /* write selector */
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struct selinfo sc_rsel; /* read selector */
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struct proc *sc_async; /* process who wants SIGIO */
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/* Sleep channels for reading and writing. */
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int sc_rchan;
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int sc_wchan;
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/* Ring buffers, separate for record and play. */
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struct audio_ringbuffer sc_rr; /* Record ring */
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struct audio_ringbuffer sc_pr; /* Play ring */
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u_char *sc_sil_start; /* start of silence in buffer */
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int sc_sil_count; /* # of silence bytes */
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u_char sc_rbus; /* input dma in progress */
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u_char sc_pbus; /* output dma in progress */
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struct audio_params sc_pparams; /* play encoding parameters */
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struct audio_params sc_rparams; /* record encoding parameters */
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int sc_eof; /* EOF, i.e. zero sixed write, counter */
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u_long sc_wstamp;
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u_long sc_playdrop;
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int sc_full_duplex; /* device in full duplex mode */
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#ifdef AUDIO_INTR_TIME
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u_long sc_pfirstintr; /* first time we saw a xmit interrupt */
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int sc_pnintr; /* number of interrupts */
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u_long sc_plastintr; /* last time we saw a xmit interrupt */
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long sc_pblktime; /* nominal time between interrupts */
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u_long sc_rfirstintr; /* first time we saw a rec interrupt */
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int sc_rnintr; /* number of interrupts */
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u_long sc_rlastintr; /* last time we saw a xrec interrupt */
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long sc_rblktime; /* nominal time between interrupts */
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#endif
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};
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