The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/audiovar.h

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    1 /*      $NetBSD: audiovar.h,v 1.30 2004/01/31 00:07:56 fredb Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by TAMURA Kent
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 /*
   40  * Copyright (c) 1991-1993 Regents of the University of California.
   41  * All rights reserved.
   42  *
   43  * Redistribution and use in source and binary forms, with or without
   44  * modification, are permitted provided that the following conditions
   45  * are met:
   46  * 1. Redistributions of source code must retain the above copyright
   47  *    notice, this list of conditions and the following disclaimer.
   48  * 2. Redistributions in binary form must reproduce the above copyright
   49  *    notice, this list of conditions and the following disclaimer in the
   50  *    documentation and/or other materials provided with the distribution.
   51  * 3. All advertising materials mentioning features or use of this software
   52  *    must display the following acknowledgement:
   53  *      This product includes software developed by the Computer Systems
   54  *      Engineering Group at Lawrence Berkeley Laboratory.
   55  * 4. Neither the name of the University nor of the Laboratory may be used
   56  *    to endorse or promote products derived from this software without
   57  *    specific prior written permission.
   58  *
   59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   69  * SUCH DAMAGE.
   70  *
   71  *      From: Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp  (LBL)
   72  */
   73 #ifndef _SYS_DEV_AUDIOVAR_H_
   74 #define _SYS_DEV_AUDIOVAR_H_
   75 
   76 #include "aurateconv.h"         /* generated by config(8) */
   77 
   78 /*
   79  * Initial/default block duration is both configurable and patchable.
   80  */
   81 #ifndef AUDIO_BLK_MS
   82 #define AUDIO_BLK_MS    50      /* 50 ms */
   83 #endif
   84 
   85 #ifndef AU_RING_SIZE
   86 #define AU_RING_SIZE            65536
   87 #endif
   88 
   89 #define AUMINBUF 512
   90 #define AUMINBLK 32
   91 #define AUMINNOBLK 3
   92 struct audio_ringbuffer {
   93         size_t  bufsize;        /* allocated memory */
   94         int     blksize;        /* I/O block size (bytes) */
   95         int     maxblks;        /* no of blocks in ring */
   96         u_char  *start;         /* start of buffer area */
   97         u_char  *end;           /* end of buffer area */
   98         u_char  *inp;           /* input pointer (to buffer) */
   99         u_char  *outp;          /* output pointer (from buffer) */
  100         int     used;           /* no of used bytes */
  101         int     usedlow;        /* start writer when used falls below this */
  102         int     usedhigh;       /* stop writer when used goes above this */
  103         u_long  stamp;          /* bytes transferred */
  104         u_long  stamp_last;     /* old value of bytes transferred */
  105         u_long  drops;          /* missed samples from over/underrun */
  106         u_long  pdrops;         /* paused samples */
  107         char    pause;          /* transfer is paused */
  108         char    copying;        /* data is being copied */
  109         char    needfill;       /* buffer needs filling when copying is done */
  110         char    mmapped;        /* device is mmap()-ed */
  111 };
  112 
  113 #define AUDIO_N_PORTS 4
  114 
  115 struct au_mixer_ports {
  116         int     index;          /* index of port-selector mixerctl */
  117         int     master;         /* index of master mixerctl */
  118         int     nports;         /* number of selectable ports */
  119         u_char  isenum;         /* selector is enum type */
  120         u_int   allports;       /* all aumasks or'd */
  121         u_int   aumask[AUDIO_N_PORTS];  /* exposed value of "ports" */
  122         u_int   misel [AUDIO_N_PORTS];  /* ord of port, for selector */
  123         u_int   miport[AUDIO_N_PORTS];  /* index of port's mixerctl */
  124         u_char  isdual;         /* has working mixerout */
  125         int     mixerout;       /* ord of mixerout, for dual case */
  126         int     cur_port;       /* the port that gain actually controls when
  127                                    mixerout is selected, for dual case */
  128 };
  129 
  130 #if NAURATECONV > 0
  131 struct auconv_context {
  132         long    count;
  133         int32_t prev[AUDIO_MAX_CHANNELS];
  134         uint8_t *ring_start;
  135         uint8_t *ring_end;
  136 };
  137 #endif
  138 
  139 /*
  140  * Software state, per audio device.
  141  */
  142 struct audio_softc {
  143         struct  device dev;
  144         void    *hw_hdl;        /* Hardware driver handle */
  145         struct  audio_hw_if *hw_if; /* Hardware interface */
  146         struct  device *sc_dev; /* Hardware device struct */
  147         u_char  sc_open;        /* single use device */
  148 #define AUOPEN_READ     0x01
  149 #define AUOPEN_WRITE    0x02
  150         u_char  sc_mode;        /* bitmask for RECORD/PLAY */
  151 
  152         struct  selinfo sc_wsel; /* write selector */
  153         struct  selinfo sc_rsel; /* read selector */
  154         struct  proc *sc_async_audio;   /* process who wants audio SIGIO */
  155         struct  mixer_asyncs {
  156                 struct mixer_asyncs *next;
  157                 struct proc *proc;
  158         } *sc_async_mixer;  /* processes who want mixer SIGIO */
  159 
  160         /* Sleep channels for reading and writing. */
  161         int     sc_rchan;
  162         int     sc_wchan;
  163 
  164         /* Ring buffers, separate for record and play. */
  165         struct  audio_ringbuffer sc_rr; /* Record ring */
  166         struct  audio_ringbuffer sc_pr; /* Play ring */
  167 
  168 #define MAX_SAMPLE_SIZE (AUDIO_MAX_CHANNELS * 24 / 8) /* 6channels x 24bit precision */
  169         int     sc_input_fragment_length;
  170         u_char  sc_input_fragment[MAX_SAMPLE_SIZE];
  171         int     sc_pconvbuffer_size;
  172         u_char  *sc_pconvbuffer;
  173 #if NAURATECONV > 0
  174         struct auconv_context sc_pconv;
  175 #endif
  176 
  177         int     sc_rconvbuffer_size;
  178         int     sc_rconvbuffer_begin;
  179         int     sc_rconvbuffer_end;
  180         u_char  *sc_rconvbuffer;
  181 #if NAURATECONV > 0
  182         struct auconv_context sc_rconv;
  183 #endif
  184 
  185         u_char  sc_blkset;      /* Blocksize has been set */
  186 
  187         u_char  *sc_sil_start;  /* start of silence in buffer */
  188         int     sc_sil_count;   /* # of silence bytes */
  189 
  190         u_char  sc_rbus;        /* input DMA in progress */
  191         u_char  sc_pbus;        /* output DMA in progress */
  192 
  193         struct  audio_params sc_pparams;        /* play encoding parameters */
  194         struct  audio_params sc_rparams;        /* record encoding parameters */
  195 
  196         int     sc_eof;         /* EOF, i.e. zero sized write, counter */
  197         u_long  sc_wstamp;
  198         u_long  sc_playdrop;
  199 
  200         int     sc_full_duplex; /* device in full duplex mode */
  201 
  202         struct  au_mixer_ports sc_inports, sc_outports;
  203         int     sc_monitor_port;
  204 
  205         int     sc_refcnt;
  206         u_char  sc_dying;
  207 
  208 #ifdef AUDIO_INTR_TIME
  209         u_long  sc_pfirstintr;  /* first time we saw a play interrupt */
  210         int     sc_pnintr;      /* number of interrupts */
  211         u_long  sc_plastintr;   /* last time we saw a play interrupt */
  212         long    sc_pblktime;    /* nominal time between interrupts */
  213         u_long  sc_rfirstintr;  /* first time we saw a rec interrupt */
  214         int     sc_rnintr;      /* number of interrupts */
  215         u_long  sc_rlastintr;   /* last time we saw a rec interrupt */
  216         long    sc_rblktime;    /* nominal time between interrupts */
  217 #endif
  218 };
  219 
  220 extern int auconv_check_params(const struct audio_params *);
  221 
  222 #if NAURATECONV > 0
  223 extern void auconv_init_context(struct auconv_context *, long, long, uint8_t *,
  224                                 uint8_t *);
  225 extern int auconv_play(struct auconv_context *, const struct audio_params *,
  226                        uint8_t *, const uint8_t *, int);
  227 extern int auconv_record(struct auconv_context *, const struct audio_params *,
  228                          uint8_t *, const uint8_t *, int);
  229 #endif /* NAURATECONV */
  230 #endif /* _SYS_DEV_AUDIOVAR_H_ */

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