Annotation of sys/dev/audiovar.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: audiovar.h,v 1.9 2002/08/26 16:20:04 mickey Exp $ */
! 2: /* $NetBSD: audiovar.h,v 1.18 1998/03/03 09:16:16 augustss Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1991-1993 Regents of the University of California.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by the Computer Systems
! 19: * Engineering Group at Lawrence Berkeley Laboratory.
! 20: * 4. Neither the name of the University nor of the Laboratory may be used
! 21: * to endorse or promote products derived from this software without
! 22: * specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: * From: Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp (LBL)
! 37: */
! 38:
! 39: /*
! 40: * Initial/default block duration is both configurable and patchable.
! 41: */
! 42: #ifndef AUDIO_BLK_MS
! 43: #define AUDIO_BLK_MS 50 /* 50 ms */
! 44: #endif
! 45:
! 46: #ifndef AU_RING_SIZE
! 47: #define AU_RING_SIZE 65536
! 48: #endif
! 49:
! 50: #define AUMINBUF 512
! 51: #define AUMINBLK 32
! 52: #define AUMINNOBLK 2
! 53: struct audio_ringbuffer {
! 54: int bufsize; /* allocated memory */
! 55: int blksize; /* I/O block size */
! 56: int maxblks; /* no of blocks in ring */
! 57: u_char *start; /* start of buffer area */
! 58: u_char *end; /* end of buffer area */
! 59: u_char *inp; /* input pointer (to buffer) */
! 60: u_char *outp; /* output pointer (from buffer) */
! 61: int used; /* no of used bytes */
! 62: int usedlow; /* start writer when used falls below this */
! 63: int usedhigh; /* stop writer when used goes above this */
! 64: u_long stamp; /* bytes transferred */
! 65: u_long stamp_last; /* old value of bytes transferred */
! 66: u_long drops; /* missed samples from over/underrun */
! 67: u_long pdrops; /* paused samples */
! 68: char pause; /* transfer is paused */
! 69: char copying; /* data is being copied */
! 70: char needfill; /* buffer needs filling when copying is done */
! 71: char mmapped; /* device is mmap()-ed */
! 72: };
! 73:
! 74: #define AUDIO_N_PORTS 4
! 75:
! 76: struct au_mixer_ports {
! 77: int index;
! 78: int master;
! 79: int nports;
! 80: u_char isenum;
! 81: u_int allports;
! 82: u_int aumask[AUDIO_N_PORTS];
! 83: u_int misel [AUDIO_N_PORTS];
! 84: u_int miport[AUDIO_N_PORTS];
! 85: };
! 86:
! 87: /*
! 88: * Software state, per audio device.
! 89: */
! 90: struct audio_softc {
! 91: struct device dev;
! 92: void *hw_hdl; /* Hardware driver handle */
! 93: struct audio_hw_if *hw_if; /* Hardware interface */
! 94: struct device *sc_dev; /* Hardware device struct */
! 95: u_char sc_open; /* single use device */
! 96: #define AUOPEN_READ 0x01
! 97: #define AUOPEN_WRITE 0x02
! 98: u_char sc_mode; /* bitmask for RECORD/PLAY */
! 99:
! 100: struct selinfo sc_wsel; /* write selector */
! 101: struct selinfo sc_rsel; /* read selector */
! 102: struct proc *sc_async_audio; /* process who wants audio SIGIO */
! 103: struct mixer_asyncs {
! 104: struct mixer_asyncs *next;
! 105: struct proc *proc;
! 106: } *sc_async_mixer; /* processes who want mixer SIGIO */
! 107:
! 108: /* Sleep channels for reading and writing. */
! 109: int sc_rchan;
! 110: int sc_wchan;
! 111:
! 112: /* Ring buffers, separate for record and play. */
! 113: struct audio_ringbuffer sc_rr; /* Record ring */
! 114: struct audio_ringbuffer sc_pr; /* Play ring */
! 115:
! 116: u_char sc_blkset; /* Blocksize has been set */
! 117:
! 118: u_char *sc_sil_start; /* start of silence in buffer */
! 119: int sc_sil_count; /* # of silence bytes */
! 120:
! 121: u_char sc_rbus; /* input dma in progress */
! 122: u_char sc_pbus; /* output dma in progress */
! 123:
! 124: struct audio_params sc_pparams; /* play encoding parameters */
! 125: struct audio_params sc_rparams; /* record encoding parameters */
! 126:
! 127: int sc_eof; /* EOF, i.e. zero sized write, counter */
! 128: u_long sc_wstamp;
! 129: u_long sc_playdrop;
! 130:
! 131: int sc_full_duplex; /* device in full duplex mode */
! 132:
! 133: struct au_mixer_ports sc_inports, sc_outports;
! 134: int sc_monitor_port;
! 135:
! 136: int sc_refcnt;
! 137: int sc_dying;
! 138:
! 139: #ifdef AUDIO_INTR_TIME
! 140: u_long sc_pfirstintr; /* first time we saw a play interrupt */
! 141: int sc_pnintr; /* number of interrupts */
! 142: u_long sc_plastintr; /* last time we saw a play interrupt */
! 143: long sc_pblktime; /* nominal time between interrupts */
! 144: u_long sc_rfirstintr; /* first time we saw a rec interrupt */
! 145: int sc_rnintr; /* number of interrupts */
! 146: u_long sc_rlastintr; /* last time we saw a rec interrupt */
! 147: long sc_rblktime; /* nominal time between interrupts */
! 148: #endif
! 149: };
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to audiovar.h CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / dev