FreeBSD/Linux Kernel Cross Reference
sys/sys/audioio.h

     /*      $OpenBSD: audioio.h,v 1.27 2016/09/14 06:12:20 ratchov Exp $    */
     /*      $NetBSD: audioio.h,v 1.24 1998/08/13 06:28:41 mrg 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.
     *
     */
    
    #ifndef _SYS_AUDIOIO_H_
    #define _SYS_AUDIOIO_H_
    
    #define AUMODE_PLAY     0x01
    #define AUMODE_RECORD   0x02
    
    #define AUDIO_INITPAR(p) \
            (void)memset((void *)(p), 0xff, sizeof(struct audio_swpar))
    
    /*
     * argument to AUDIO_SETPAR and AUDIO_GETPAR ioctls
     */
    struct audio_swpar {
            unsigned int sig;               /* if 1, encoding is signed */
            unsigned int le;                /* if 1, encoding is little-endian */
            unsigned int bits;              /* bits per sample */
            unsigned int bps;               /* bytes per sample */
            unsigned int msb;               /* if 1, bits are msb-aligned */
            unsigned int rate;              /* common play & rec sample rate */
            unsigned int pchan;             /* play channels */
            unsigned int rchan;             /* rec channels */
            unsigned int nblks;             /* number of blocks in play buffer */
            unsigned int round;             /* common frames per block */
            unsigned int _spare[6];
    };
    
    /*
     * argument to AUDIO_GETSTATUS
     */
    struct audio_status {
            int mode;
            int pause;
            int active;
            int _spare[5];
    };
    
    /*
     * Parameter for the AUDIO_GETDEV ioctl to determine current
     * audio devices.
     */
    #define MAX_AUDIO_DEV_LEN       16
    typedef struct audio_device {
            char name[MAX_AUDIO_DEV_LEN];
            char version[MAX_AUDIO_DEV_LEN];
            char config[MAX_AUDIO_DEV_LEN];
    } audio_device_t;
    
    struct audio_pos {
            unsigned int play_pos;  /* total bytes played */
            unsigned int play_xrun; /* bytes of silence inserted */
            unsigned int rec_pos;   /* total bytes recorded */
            unsigned int rec_xrun;  /* bytes dropped */
    };
    
    /*
     * Audio device operations
     */
    #define AUDIO_GETDEV    _IOR('A', 27, struct audio_device)
    #define AUDIO_GETPOS    _IOR('A', 35, struct audio_pos)
    #define AUDIO_GETPAR    _IOR('A', 36, struct audio_swpar)
    #define AUDIO_SETPAR    _IOWR('A', 37, struct audio_swpar)
    #define AUDIO_START     _IO('A', 38)
   #define AUDIO_STOP      _IO('A', 39)
   #define AUDIO_GETSTATUS _IOR('A', 40, struct audio_status)
   
   /*
    * Mixer device
    */
   #define AUDIO_MIN_GAIN  0
   #define AUDIO_MAX_GAIN  255
   
   typedef struct mixer_level {
           int num_channels;
           u_char level[8];        /* [num_channels] */
   } mixer_level_t;
   #define AUDIO_MIXER_LEVEL_MONO  0
   #define AUDIO_MIXER_LEVEL_LEFT  0
   #define AUDIO_MIXER_LEVEL_RIGHT 1
   
   /*
    * Device operations
    */
   
   typedef struct audio_mixer_name {
           char name[MAX_AUDIO_DEV_LEN];
           int msg_id;
   } audio_mixer_name_t;
   
   typedef struct mixer_devinfo {
           int index;
           audio_mixer_name_t label;
           int type;
   #define AUDIO_MIXER_CLASS       0
   #define AUDIO_MIXER_ENUM        1
   #define AUDIO_MIXER_SET         2
   #define AUDIO_MIXER_VALUE       3
           int mixer_class;
           int next, prev;
   #define AUDIO_MIXER_LAST        -1
           union {
                   struct audio_mixer_enum {
                           int num_mem;
                           struct {
                                   audio_mixer_name_t label;
                                   int ord;
                           } member[32];
                   } e;
                   struct audio_mixer_set {
                           int num_mem;
                           struct {
                                   audio_mixer_name_t label;
                                   int mask;
                           } member[32];
                   } s;
                   struct audio_mixer_value {
                           audio_mixer_name_t units;
                           int num_channels;
                           int delta;
                   } v;
           } un;
   } mixer_devinfo_t;
   
   
   typedef struct mixer_ctrl {
           int dev;
           int type;
           union {
                   int ord;                /* enum */
                   int mask;               /* set */
                   mixer_level_t value;    /* value */
           } un;
   } mixer_ctrl_t;
   
   /*
    * Mixer operations
    */
   #define AUDIO_MIXER_READ                _IOWR('M', 0, mixer_ctrl_t)
   #define AUDIO_MIXER_WRITE               _IOWR('M', 1, mixer_ctrl_t)
   #define AUDIO_MIXER_DEVINFO             _IOWR('M', 2, mixer_devinfo_t)
   
   /*
    * Well known device names
    */
   #define AudioNmicrophone        "mic"
   #define AudioNline      "line"
   #define AudioNcd        "cd"
   #define AudioNdac       "dac"
   #define AudioNaux       "aux"
   #define AudioNrecord    "record"
   #define AudioNvolume    "volume"
   #define AudioNmonitor   "monitor"
   #define AudioNtreble    "treble"
   #define AudioNmid       "mid"
   #define AudioNbass      "bass"
   #define AudioNbassboost "bassboost"
   #define AudioNspeaker   "spkr"
   #define AudioNheadphone "hp"
   #define AudioNoutput    "output"
   #define AudioNinput     "input"
   #define AudioNmaster    "master"
   #define AudioNstereo    "stereo"
   #define AudioNmono      "mono"
   #define AudioNloudness  "loudness"
   #define AudioNspatial   "spatial"
   #define AudioNsurround  "surround"
   #define AudioNpseudo    "pseudo"
   #define AudioNmute      "mute"
   #define AudioNenhanced  "enhanced"
   #define AudioNpreamp    "preamp"
   #define AudioNon        "on"
   #define AudioNoff       "off"
   #define AudioNmode      "mode"
   #define AudioNsource    "source"
   #define AudioNfmsynth   "fmsynth"
   #define AudioNwave      "wave"
   #define AudioNmidi      "midi"
   #define AudioNmixerout  "mixerout"
   #define AudioNswap      "swap"  /* swap left and right channels */
   #define AudioNagc       "agc"
   #define AudioNdelay     "delay"
   #define AudioNselect    "select" /* select destination */
   #define AudioNvideo     "video"
   #define AudioNcenter    "center"
   #define AudioNdepth     "depth"
   #define AudioNlfe       "lfe"
   #define AudioNextamp    "extamp"
   
   #define AudioCinputs    "inputs"
   #define AudioCoutputs   "outputs"
   #define AudioCrecord    "record"
   #define AudioCmonitor   "monitor"
   #define AudioCequalization      "equalization"
   
   #endif /* !_SYS_AUDIOIO_H_ */

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