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

     /*      $NetBSD: audioio.h,v 1.32.44.1 2009/10/16 05:43:38 snj 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_
    
    #include <sys/types.h>
    #include <sys/ioccom.h>
    
    #ifndef _KERNEL
    #include <string.h>     /* Required for memset(3) prototype (AUDIO_INITINFO) */
    #endif /* _KERNEL */
    
    /*
     * Audio device
     */
    struct audio_prinfo {
            u_int   sample_rate;    /* sample rate in bit/s */
            u_int   channels;       /* number of channels, usually 1 or 2 */
            u_int   precision;      /* number of bits/sample */
            u_int   encoding;       /* data encoding (AUDIO_ENCODING_* below) */
            u_int   gain;           /* volume level */
            u_int   port;           /* selected I/O port */
            u_int   seek;           /* BSD extension */
            u_int   avail_ports;    /* available I/O ports */
            u_int   buffer_size;    /* total size audio buffer */
            u_int   _ispare[1];
            /* Current state of device: */
            u_int   samples;        /* number of samples */
            u_int   eof;            /* End Of File (zero-size writes) counter */
            u_char  pause;          /* non-zero if paused, zero to resume */
            u_char  error;          /* non-zero if underflow/overflow ocurred */
            u_char  waiting;        /* non-zero if another process hangs in open */
            u_char  balance;        /* stereo channel balance */
            u_char  cspare[2];
            u_char  open;           /* non-zero if currently open */
            u_char  active;         /* non-zero if I/O is currently active */
    };
    typedef struct audio_prinfo audio_prinfo_t;
    
    struct audio_info {
            struct  audio_prinfo play;      /* Info for play (output) side */
            struct  audio_prinfo record;    /* Info for record (input) side */
    
            u_int   monitor_gain;   /* input to output mix */
            /* BSD extensions */
            u_int   blocksize;      /* H/W read/write block size */
            u_int   hiwat;          /* output high water mark */
            u_int   lowat;          /* output low water mark */
            u_int   _ispare1;
            u_int   mode;           /* current device mode */
    #define AUMODE_PLAY     0x01
    #define AUMODE_RECORD   0x02
    #define AUMODE_PLAY_ALL 0x04    /* don't do real-time correction */
    };
    typedef struct audio_info audio_info_t;
    
    #define AUDIO_INITINFO(p) \
            (void)memset((void *)(p), 0xff, sizeof(struct audio_info))
    
    /*
     * 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;
   
   typedef struct audio_offset {
           u_int   samples;        /* Total number of bytes transferred */
           u_int   deltablks;      /* Blocks transferred since last checked */
           u_int   offset;         /* Physical transfer offset in buffer */
   } audio_offset_t;
   
   /*
    * Supported audio encodings
    */
   /* Encoding ID's */
   #define AUDIO_ENCODING_NONE             0 /* no encoding assigned */
   #define AUDIO_ENCODING_ULAW             1 /* ITU G.711 mu-law */
   #define AUDIO_ENCODING_ALAW             2 /* ITU G.711 A-law */
   #define AUDIO_ENCODING_PCM16            3 /* signed linear PCM, obsolete */
   #define AUDIO_ENCODING_LINEAR           AUDIO_ENCODING_PCM16 /* SunOS compat */
   #define AUDIO_ENCODING_PCM8             4 /* unsigned linear PCM, obsolete */
   #define AUDIO_ENCODING_LINEAR8          AUDIO_ENCODING_PCM8 /* SunOS compat */
   #define AUDIO_ENCODING_ADPCM            5 /* adaptive differential PCM */
   #define AUDIO_ENCODING_SLINEAR_LE       6
   #define AUDIO_ENCODING_SLINEAR_BE       7
   #define AUDIO_ENCODING_ULINEAR_LE       8
   #define AUDIO_ENCODING_ULINEAR_BE       9
   #define AUDIO_ENCODING_SLINEAR          10
   #define AUDIO_ENCODING_ULINEAR          11
   #define AUDIO_ENCODING_MPEG_L1_STREAM   12
   #define AUDIO_ENCODING_MPEG_L1_PACKETS  13
   #define AUDIO_ENCODING_MPEG_L1_SYSTEM   14
   #define AUDIO_ENCODING_MPEG_L2_STREAM   15
   #define AUDIO_ENCODING_MPEG_L2_PACKETS  16
   #define AUDIO_ENCODING_MPEG_L2_SYSTEM   17
   
   typedef struct audio_encoding {
           int     index;
           char    name[MAX_AUDIO_DEV_LEN];
           int     encoding;
           int     precision;
           int     flags;
   #define AUDIO_ENCODINGFLAG_EMULATED 1 /* software emulation mode */
   } audio_encoding_t;
   
   /*
    * Balance settings.
    */
   #define AUDIO_LEFT_BALANCE      0       /* left channel only    */
   #define AUDIO_MID_BALANCE       32      /* equal left/right channel */
   #define AUDIO_RIGHT_BALANCE     64      /* right channel only   */
   #define AUDIO_BALANCE_SHIFT     3
   
   /*
    * Output ports
    */
   #define AUDIO_SPEAKER           0x01    /* built-in speaker */
   #define AUDIO_HEADPHONE         0x02    /* headphone jack */
   #define AUDIO_LINE_OUT          0x04    /* line out      */
   
   /*
    * Input ports
    */
   #define AUDIO_MICROPHONE        0x01    /* microphone */
   #define AUDIO_LINE_IN           0x02    /* line in       */
   #define AUDIO_CD                0x04    /* on-board CD inputs */
   #define AUDIO_INTERNAL_CD_IN    AUDIO_CD        /* internal CDROM */
   
   /*
    * Audio device operations
    */
   #define AUDIO_GETINFO   _IOR('A', 21, struct audio_info)
   #define AUDIO_SETINFO   _IOWR('A', 22, struct audio_info)
   #define AUDIO_DRAIN     _IO('A', 23)
   #define AUDIO_FLUSH     _IO('A', 24)
   #define AUDIO_WSEEK     _IOR('A', 25, u_long)
   #define AUDIO_RERROR    _IOR('A', 26, int)
   #define AUDIO_GETDEV    _IOR('A', 27, struct audio_device)
   #define AUDIO_GETENC    _IOWR('A', 28, struct audio_encoding)
   #define AUDIO_GETFD     _IOR('A', 29, int)
   #define AUDIO_SETFD     _IOWR('A', 30, int)
   #define AUDIO_PERROR    _IOR('A', 31, int)
   #define AUDIO_GETIOFFS  _IOR('A', 32, struct audio_offset)
   #define AUDIO_GETOOFFS  _IOR('A', 33, struct audio_offset)
   #define AUDIO_GETPROPS  _IOR('A', 34, int)
   #define  AUDIO_PROP_FULLDUPLEX  0x01
   #define  AUDIO_PROP_MMAP        0x02
   #define  AUDIO_PROP_INDEPENDENT 0x04
   #define  AUDIO_PROP_PLAYBACK    0x10
   #define  AUDIO_PROP_CAPTURE     0x20
   #define AUDIO_GETBUFINFO        _IOR('A', 35, struct audio_info)
   
   /*
    * 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   "speaker"
   #define AudioNheadphone "headphones"
   #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 AudioEmulaw             "mulaw"
   #define AudioEalaw              "alaw"
   #define AudioEadpcm             "adpcm"
   #define AudioEslinear           "slinear"
   #define AudioEslinear_le        "slinear_le"
   #define AudioEslinear_be        "slinear_be"
   #define AudioEulinear           "ulinear"
   #define AudioEulinear_le        "ulinear_le"
   #define AudioEulinear_be        "ulinear_be"
   #define AudioEmpeg_l1_stream    "mpeg_l1_stream"
   #define AudioEmpeg_l1_packets   "mpeg_l1_packets"
   #define AudioEmpeg_l1_system    "mpeg_l1_system"
   #define AudioEmpeg_l2_stream    "mpeg_l2_stream"
   #define AudioEmpeg_l2_packets   "mpeg_l2_packets"
   #define AudioEmpeg_l2_system    "mpeg_l2_system"
   
   #define AudioCinputs    "inputs"
   #define AudioCoutputs   "outputs"
   #define AudioCrecord    "record"
   #define AudioCmonitor   "monitor"
   #define AudioCequalization      "equalization"
   #define AudioCmodem     "modem"
   
   #endif /* !_SYS_AUDIOIO_H_ */

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