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 }; 150