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

     /*      $NetBSD: audiovar.h,v 1.30 2004/01/31 00:07:56 fredb Exp $      */
     
     /*-
      * Copyright (c) 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by TAMURA Kent
      *
     * 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 NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    /*
     * 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)
     */
    #ifndef _SYS_DEV_AUDIOVAR_H_
    #define _SYS_DEV_AUDIOVAR_H_
    
    #include "aurateconv.h"         /* generated by config(8) */
    
    /*
     * 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 {
            size_t  bufsize;        /* allocated memory */
            int     blksize;        /* I/O block size (bytes) */
            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 */
   };
   
   #define AUDIO_N_PORTS 4
   
   struct au_mixer_ports {
           int     index;          /* index of port-selector mixerctl */
           int     master;         /* index of master mixerctl */
           int     nports;         /* number of selectable ports */
           u_char  isenum;         /* selector is enum type */
           u_int   allports;       /* all aumasks or'd */
           u_int   aumask[AUDIO_N_PORTS];  /* exposed value of "ports" */
           u_int   misel [AUDIO_N_PORTS];  /* ord of port, for selector */
           u_int   miport[AUDIO_N_PORTS];  /* index of port's mixerctl */
           u_char  isdual;         /* has working mixerout */
           int     mixerout;       /* ord of mixerout, for dual case */
           int     cur_port;       /* the port that gain actually controls when
                                      mixerout is selected, for dual case */
   };
   
   #if NAURATECONV > 0
   struct auconv_context {
           long    count;
           int32_t prev[AUDIO_MAX_CHANNELS];
           uint8_t *ring_start;
           uint8_t *ring_end;
   };
   #endif
   
   /*
    * Software state, per audio device.
    */
   struct audio_softc {
           struct  device dev;
           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_audio;   /* process who wants audio SIGIO */
           struct  mixer_asyncs {
                   struct mixer_asyncs *next;
                   struct proc *proc;
           } *sc_async_mixer;  /* processes who want mixer 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 */
   
   #define MAX_SAMPLE_SIZE (AUDIO_MAX_CHANNELS * 24 / 8) /* 6channels x 24bit precision */
           int     sc_input_fragment_length;
           u_char  sc_input_fragment[MAX_SAMPLE_SIZE];
           int     sc_pconvbuffer_size;
           u_char  *sc_pconvbuffer;
   #if NAURATECONV > 0
           struct auconv_context sc_pconv;
   #endif
   
           int     sc_rconvbuffer_size;
           int     sc_rconvbuffer_begin;
           int     sc_rconvbuffer_end;
           u_char  *sc_rconvbuffer;
   #if NAURATECONV > 0
           struct auconv_context sc_rconv;
   #endif
   
           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 sized write, counter */
           u_long  sc_wstamp;
           u_long  sc_playdrop;
   
           int     sc_full_duplex; /* device in full duplex mode */
   
           struct  au_mixer_ports sc_inports, sc_outports;
           int     sc_monitor_port;
   
           int     sc_refcnt;
           u_char  sc_dying;
   
   #ifdef AUDIO_INTR_TIME
           u_long  sc_pfirstintr;  /* first time we saw a play interrupt */
           int     sc_pnintr;      /* number of interrupts */
           u_long  sc_plastintr;   /* last time we saw a play 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 rec interrupt */
           long    sc_rblktime;    /* nominal time between interrupts */
   #endif
   };
   
   extern int auconv_check_params(const struct audio_params *);
   
   #if NAURATECONV > 0
   extern void auconv_init_context(struct auconv_context *, long, long, uint8_t *,
                                   uint8_t *);
   extern int auconv_play(struct auconv_context *, const struct audio_params *,
                          uint8_t *, const uint8_t *, int);
   extern int auconv_record(struct auconv_context *, const struct audio_params *,
                            uint8_t *, const uint8_t *, int);
   #endif /* NAURATECONV */
   #endif /* _SYS_DEV_AUDIOVAR_H_ */

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