125 lines
4.7 KiB
C
125 lines
4.7 KiB
C
/* $NetBSD: audiovar.h,v 1.14 1997/08/08 00:03:28 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 {
|
|
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; /* process who wants 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
|
|
};
|