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asound.h

/*
 *  Advanced Linux Sound Architecture - ALSA - Driver
 *  Copyright (c) 1994-2003 by Jaroslav Kysela <perex@suse.cz>,
 *                             Abramo Bagnara <abramo@alsa-project.org>
 *
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#ifndef __SOUND_ASOUND_H
#define __SOUND_ASOUND_H

#if defined(LINUX) || defined(__LINUX__) || defined(__linux__)

#include <linux/ioctl.h>

#ifdef __KERNEL__

#include <linux/types.h>
#include <linux/time.h>
#include <asm/byteorder.h>

#ifdef  __LITTLE_ENDIAN
#define SNDRV_LITTLE_ENDIAN
#else
#ifdef __BIG_ENDIAN
#define SNDRV_BIG_ENDIAN
#else
#error "Unsupported endian..."
#endif
#endif

#else /* !__KERNEL__ */

#include <endian.h>
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define SNDRV_LITTLE_ENDIAN
#elif __BYTE_ORDER == __BIG_ENDIAN
#define SNDRV_BIG_ENDIAN
#else
#error "Unsupported endian..."
#endif

#endif /* __KERNEL **/

#endif /* LINUX */

#ifndef __KERNEL__
#include <sys/time.h>
#include <sys/types.h>
#endif

/*
 *  protocol version
 */

#define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))
#define SNDRV_PROTOCOL_MAJOR(version) (((version)>>16)&0xffff)
#define SNDRV_PROTOCOL_MINOR(version) (((version)>>8)&0xff)
#define SNDRV_PROTOCOL_MICRO(version) ((version)&0xff)
#define SNDRV_PROTOCOL_INCOMPATIBLE(kversion, uversion) \
      (SNDRV_PROTOCOL_MAJOR(kversion) != SNDRV_PROTOCOL_MAJOR(uversion) || \
       (SNDRV_PROTOCOL_MAJOR(kversion) == SNDRV_PROTOCOL_MAJOR(uversion) && \
         SNDRV_PROTOCOL_MINOR(kversion) != SNDRV_PROTOCOL_MINOR(uversion)))

/****************************************************************************
 *                                                                          *
 *        Digital audio interface                               *
 *                                                                          *
 ****************************************************************************/

struct sndrv_aes_iec958 {
      unsigned char status[24];     /* AES/IEC958 channel status bits */
      unsigned char subcode[147];   /* AES/IEC958 subcode bits */
      unsigned char pad;            /* nothing */
      unsigned char dig_subframe[4];      /* AES/IEC958 subframe bits */
};

/****************************************************************************
 *                                                                          *
 *      Section for driver hardware dependent interface - /dev/snd/hw?      *
 *                                                                          *
 ****************************************************************************/

#define SNDRV_HWDEP_VERSION         SNDRV_PROTOCOL_VERSION(1, 0, 1)

enum sndrv_hwdep_iface {
      SNDRV_HWDEP_IFACE_OPL2 = 0,
      SNDRV_HWDEP_IFACE_OPL3,
      SNDRV_HWDEP_IFACE_OPL4,
      SNDRV_HWDEP_IFACE_SB16CSP,    /* Creative Signal Processor */
      SNDRV_HWDEP_IFACE_EMU10K1,    /* FX8010 processor in EMU10K1 chip */
      SNDRV_HWDEP_IFACE_YSS225,     /* Yamaha FX processor */
      SNDRV_HWDEP_IFACE_ICS2115,    /* Wavetable synth */
      SNDRV_HWDEP_IFACE_SSCAPE,     /* Ensoniq SoundScape ISA card (MC68EC000) */
      SNDRV_HWDEP_IFACE_VX,         /* Digigram VX cards */
      SNDRV_HWDEP_IFACE_MIXART,     /* Digigram miXart cards */
      SNDRV_HWDEP_IFACE_USX2Y,      /* Tascam US122, US224 & US428 usb */
      SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */      
      SNDRV_HWDEP_IFACE_BLUETOOTH,  /* Bluetooth audio */
      SNDRV_HWDEP_IFACE_USX2Y_PCM,  /* Tascam US122, US224 & US428 rawusb pcm */
      SNDRV_HWDEP_IFACE_PCXHR,      /* Digigram PCXHR */
      SNDRV_HWDEP_IFACE_SB_RC,      /* SB Extigy/Audigy2NX remote control */

      /* Don't forget to change the following: */
      SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_SB_RC
};

struct sndrv_hwdep_info {
      unsigned int device;          /* WR: device number */
      int card;               /* R: card number */
      unsigned char id[64];         /* ID (user selectable) */
      unsigned char name[80];       /* hwdep name */
      enum sndrv_hwdep_iface iface; /* hwdep interface */
      unsigned char reserved[64];   /* reserved for future */
};

/* generic DSP loader */
struct sndrv_hwdep_dsp_status {
      unsigned int version;         /* R: driver-specific version */
      unsigned char id[32];         /* R: driver-specific ID string */
      unsigned int num_dsps;        /* R: number of DSP images to transfer */
      unsigned int dsp_loaded;      /* R: bit flags indicating the loaded DSPs */
      unsigned int chip_ready;      /* R: 1 = initialization finished */
      unsigned char reserved[16];   /* reserved for future use */
};

struct sndrv_hwdep_dsp_image {
      unsigned int index;           /* W: DSP index */
      unsigned char name[64];       /* W: ID (e.g. file name) */
      unsigned char __user *image;  /* W: binary image */
      size_t length;                /* W: size of image in bytes */
      unsigned long driver_data;    /* W: driver-specific data */
};

enum {
      SNDRV_HWDEP_IOCTL_PVERSION = _IOR ('H', 0x00, int),
      SNDRV_HWDEP_IOCTL_INFO = _IOR ('H', 0x01, struct sndrv_hwdep_info),
      SNDRV_HWDEP_IOCTL_DSP_STATUS = _IOR('H', 0x02, struct sndrv_hwdep_dsp_status),
      SNDRV_HWDEP_IOCTL_DSP_LOAD   = _IOW('H', 0x03, struct sndrv_hwdep_dsp_image)
};

/*****************************************************************************
 *                                                                           *
 *             Digital Audio (PCM) interface - /dev/snd/pcm??                *
 *                                                                           *
 *****************************************************************************/

#define SNDRV_PCM_VERSION           SNDRV_PROTOCOL_VERSION(2, 0, 7)

typedef unsigned long sndrv_pcm_uframes_t;
typedef long sndrv_pcm_sframes_t;

enum sndrv_pcm_class {
      SNDRV_PCM_CLASS_GENERIC = 0,  /* standard mono or stereo device */
      SNDRV_PCM_CLASS_MULTI,        /* multichannel device */
      SNDRV_PCM_CLASS_MODEM,        /* software modem class */
      SNDRV_PCM_CLASS_DIGITIZER,    /* digitizer class */
      /* Don't forget to change the following: */
      SNDRV_PCM_CLASS_LAST = SNDRV_PCM_CLASS_DIGITIZER,
};

enum sndrv_pcm_subclass {
      SNDRV_PCM_SUBCLASS_GENERIC_MIX = 0, /* mono or stereo subdevices are mixed together */
      SNDRV_PCM_SUBCLASS_MULTI_MIX, /* multichannel subdevices are mixed together */
      /* Don't forget to change the following: */
      SNDRV_PCM_SUBCLASS_LAST = SNDRV_PCM_SUBCLASS_MULTI_MIX,
};

enum sndrv_pcm_stream {
      SNDRV_PCM_STREAM_PLAYBACK = 0,
      SNDRV_PCM_STREAM_CAPTURE,
      SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
};

enum sndrv_pcm_access {
      SNDRV_PCM_ACCESS_MMAP_INTERLEAVED = 0,    /* interleaved mmap */
      SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED,     /* noninterleaved mmap */
      SNDRV_PCM_ACCESS_MMAP_COMPLEX,            /* complex mmap */
      SNDRV_PCM_ACCESS_RW_INTERLEAVED,    /* readi/writei */
      SNDRV_PCM_ACCESS_RW_NONINTERLEAVED, /* readn/writen */
      SNDRV_PCM_ACCESS_LAST = SNDRV_PCM_ACCESS_RW_NONINTERLEAVED,
};

enum sndrv_pcm_format {
      SNDRV_PCM_FORMAT_S8 = 0,
      SNDRV_PCM_FORMAT_U8,
      SNDRV_PCM_FORMAT_S16_LE,
      SNDRV_PCM_FORMAT_S16_BE,
      SNDRV_PCM_FORMAT_U16_LE,
      SNDRV_PCM_FORMAT_U16_BE,
      SNDRV_PCM_FORMAT_S24_LE,      /* low three bytes */
      SNDRV_PCM_FORMAT_S24_BE,      /* low three bytes */
      SNDRV_PCM_FORMAT_U24_LE,      /* low three bytes */
      SNDRV_PCM_FORMAT_U24_BE,      /* low three bytes */
      SNDRV_PCM_FORMAT_S32_LE,
      SNDRV_PCM_FORMAT_S32_BE,
      SNDRV_PCM_FORMAT_U32_LE,
      SNDRV_PCM_FORMAT_U32_BE,
      SNDRV_PCM_FORMAT_FLOAT_LE,    /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
      SNDRV_PCM_FORMAT_FLOAT_BE,    /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
      SNDRV_PCM_FORMAT_FLOAT64_LE,  /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
      SNDRV_PCM_FORMAT_FLOAT64_BE,  /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
      SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,      /* IEC-958 subframe, Little Endian */
      SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,      /* IEC-958 subframe, Big Endian */
      SNDRV_PCM_FORMAT_MU_LAW,
      SNDRV_PCM_FORMAT_A_LAW,
      SNDRV_PCM_FORMAT_IMA_ADPCM,
      SNDRV_PCM_FORMAT_MPEG,
      SNDRV_PCM_FORMAT_GSM,
      SNDRV_PCM_FORMAT_SPECIAL = 31,
      SNDRV_PCM_FORMAT_S24_3LE = 32,      /* in three bytes */
      SNDRV_PCM_FORMAT_S24_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U24_3LE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U24_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_S20_3LE,     /* in three bytes */
      SNDRV_PCM_FORMAT_S20_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U20_3LE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U20_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_S18_3LE,     /* in three bytes */
      SNDRV_PCM_FORMAT_S18_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U18_3LE,     /* in three bytes */
      SNDRV_PCM_FORMAT_U18_3BE,     /* in three bytes */
      SNDRV_PCM_FORMAT_LAST = SNDRV_PCM_FORMAT_U18_3BE,

#ifdef SNDRV_LITTLE_ENDIAN
      SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_LE,
      SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_LE,
      SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_LE,
      SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_LE,
      SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_LE,
      SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_LE,
      SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_LE,
      SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_LE,
      SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE,
#endif
#ifdef SNDRV_BIG_ENDIAN
      SNDRV_PCM_FORMAT_S16 = SNDRV_PCM_FORMAT_S16_BE,
      SNDRV_PCM_FORMAT_U16 = SNDRV_PCM_FORMAT_U16_BE,
      SNDRV_PCM_FORMAT_S24 = SNDRV_PCM_FORMAT_S24_BE,
      SNDRV_PCM_FORMAT_U24 = SNDRV_PCM_FORMAT_U24_BE,
      SNDRV_PCM_FORMAT_S32 = SNDRV_PCM_FORMAT_S32_BE,
      SNDRV_PCM_FORMAT_U32 = SNDRV_PCM_FORMAT_U32_BE,
      SNDRV_PCM_FORMAT_FLOAT = SNDRV_PCM_FORMAT_FLOAT_BE,
      SNDRV_PCM_FORMAT_FLOAT64 = SNDRV_PCM_FORMAT_FLOAT64_BE,
      SNDRV_PCM_FORMAT_IEC958_SUBFRAME = SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE,
#endif
};

enum sndrv_pcm_subformat {
      SNDRV_PCM_SUBFORMAT_STD = 0,
      SNDRV_PCM_SUBFORMAT_LAST = SNDRV_PCM_SUBFORMAT_STD,
};

#define SNDRV_PCM_INFO_MMAP         0x00000001  /* hardware supports mmap */
#define SNDRV_PCM_INFO_MMAP_VALID   0x00000002  /* period data are valid during transfer */
#define SNDRV_PCM_INFO_DOUBLE       0x00000004  /* Double buffering needed for PCM start/stop */
#define SNDRV_PCM_INFO_BATCH        0x00000010  /* double buffering */
#define SNDRV_PCM_INFO_INTERLEAVED  0x00000100  /* channels are interleaved */
#define SNDRV_PCM_INFO_NONINTERLEAVED     0x00000200  /* channels are not interleaved */
#define SNDRV_PCM_INFO_COMPLEX            0x00000400  /* complex frame organization (mmap only) */
#define SNDRV_PCM_INFO_BLOCK_TRANSFER     0x00010000  /* hardware transfer block of samples */
#define SNDRV_PCM_INFO_OVERRANGE    0x00020000  /* hardware supports ADC (capture) overrange detection */
#define SNDRV_PCM_INFO_RESUME       0x00040000  /* hardware supports stream resume after suspend */
#define SNDRV_PCM_INFO_PAUSE        0x00080000  /* pause ioctl is supported */
#define SNDRV_PCM_INFO_HALF_DUPLEX  0x00100000  /* only half duplex */
#define SNDRV_PCM_INFO_JOINT_DUPLEX 0x00200000  /* playback and capture stream are somewhat correlated */
#define SNDRV_PCM_INFO_SYNC_START   0x00400000  /* pcm support some kind of sync go */

enum sndrv_pcm_state {
      SNDRV_PCM_STATE_OPEN = 0,     /* stream is open */
      SNDRV_PCM_STATE_SETUP,        /* stream has a setup */
      SNDRV_PCM_STATE_PREPARED,     /* stream is ready to start */
      SNDRV_PCM_STATE_RUNNING,      /* stream is running */
      SNDRV_PCM_STATE_XRUN,         /* stream reached an xrun */
      SNDRV_PCM_STATE_DRAINING,     /* stream is draining */
      SNDRV_PCM_STATE_PAUSED,       /* stream is paused */
      SNDRV_PCM_STATE_SUSPENDED,    /* hardware is suspended */
      SNDRV_PCM_STATE_DISCONNECTED, /* hardware is disconnected */
      SNDRV_PCM_STATE_LAST = SNDRV_PCM_STATE_DISCONNECTED,
};

enum {
      SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000,
      SNDRV_PCM_MMAP_OFFSET_STATUS = 0x80000000,
      SNDRV_PCM_MMAP_OFFSET_CONTROL = 0x81000000,
};

union sndrv_pcm_sync_id {
      unsigned char id[16];
      unsigned short id16[8];
      unsigned int id32[4];
};

struct sndrv_pcm_info {
      unsigned int device;          /* RO/WR (control): device number */
      unsigned int subdevice;       /* RO/WR (control): subdevice number */
      enum sndrv_pcm_stream stream; /* RO/WR (control): stream number */
      int card;               /* R: card number */
      unsigned char id[64];         /* ID (user selectable) */
      unsigned char name[80];       /* name of this device */
      unsigned char subname[32];    /* subdevice name */
      enum sndrv_pcm_class dev_class;     /* SNDRV_PCM_CLASS_* */
      enum sndrv_pcm_subclass dev_subclass; /* SNDRV_PCM_SUBCLASS_* */
      unsigned int subdevices_count;
      unsigned int subdevices_avail;
      union sndrv_pcm_sync_id sync; /* hardware synchronization ID */
      unsigned char reserved[64];   /* reserved for future... */
};

enum sndrv_pcm_hw_param {
      SNDRV_PCM_HW_PARAM_ACCESS = 0,      /* Access type */
      SNDRV_PCM_HW_PARAM_FIRST_MASK = SNDRV_PCM_HW_PARAM_ACCESS,
      SNDRV_PCM_HW_PARAM_FORMAT,    /* Format */
      SNDRV_PCM_HW_PARAM_SUBFORMAT, /* Subformat */
      SNDRV_PCM_HW_PARAM_LAST_MASK = SNDRV_PCM_HW_PARAM_SUBFORMAT,

      SNDRV_PCM_HW_PARAM_SAMPLE_BITS = 8, /* Bits per sample */
      SNDRV_PCM_HW_PARAM_FIRST_INTERVAL = SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
      SNDRV_PCM_HW_PARAM_FRAME_BITS,      /* Bits per frame */
      SNDRV_PCM_HW_PARAM_CHANNELS,  /* Channels */
      SNDRV_PCM_HW_PARAM_RATE,      /* Approx rate */
      SNDRV_PCM_HW_PARAM_PERIOD_TIME,     /* Approx distance between interrupts
                                 in us */
      SNDRV_PCM_HW_PARAM_PERIOD_SIZE,     /* Approx frames between interrupts */
      SNDRV_PCM_HW_PARAM_PERIOD_BYTES, /* Approx bytes between interrupts */
      SNDRV_PCM_HW_PARAM_PERIODS,   /* Approx interrupts per buffer */
      SNDRV_PCM_HW_PARAM_BUFFER_TIME,     /* Approx duration of buffer in us */
      SNDRV_PCM_HW_PARAM_BUFFER_SIZE,     /* Size of buffer in frames */
      SNDRV_PCM_HW_PARAM_BUFFER_BYTES, /* Size of buffer in bytes */
      SNDRV_PCM_HW_PARAM_TICK_TIME, /* Approx tick duration in us */
      SNDRV_PCM_HW_PARAM_LAST_INTERVAL = SNDRV_PCM_HW_PARAM_TICK_TIME
};

#define SNDRV_PCM_HW_PARAMS_NORESAMPLE          (1<<0)      /* avoid rate resampling */

struct sndrv_interval {
      unsigned int min, max;
      unsigned int openmin:1,
                 openmax:1,
                 integer:1,
                 empty:1;
};

#define SNDRV_MASK_MAX  256

struct sndrv_mask {
      u_int32_t bits[(SNDRV_MASK_MAX+31)/32];
};

struct sndrv_pcm_hw_params {
      unsigned int flags;
      struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - 
                         SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
      struct sndrv_mask mres[5];    /* reserved masks */
      struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
                                SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
      struct sndrv_interval ires[9];      /* reserved intervals */
      unsigned int rmask;           /* W: requested masks */
      unsigned int cmask;           /* R: changed masks */
      unsigned int info;            /* R: Info flags for returned setup */
      unsigned int msbits;          /* R: used most significant bits */
      unsigned int rate_num;        /* R: rate numerator */
      unsigned int rate_den;        /* R: rate denominator */
      sndrv_pcm_uframes_t fifo_size;      /* R: chip FIFO size in frames */
      unsigned char reserved[64];   /* reserved for future */
};

enum sndrv_pcm_tstamp {
      SNDRV_PCM_TSTAMP_NONE = 0,
      SNDRV_PCM_TSTAMP_MMAP,
      SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_MMAP,
};

struct sndrv_pcm_sw_params {
      enum sndrv_pcm_tstamp tstamp_mode;  /* timestamp mode */
      unsigned int period_step;
      unsigned int sleep_min;             /* min ticks to sleep */
      sndrv_pcm_uframes_t avail_min;            /* min avail frames for wakeup */
      sndrv_pcm_uframes_t xfer_align;           /* xfer size need to be a multiple */
      sndrv_pcm_uframes_t start_threshold;      /* min hw_avail frames for automatic start */
      sndrv_pcm_uframes_t stop_threshold; /* min avail frames for automatic stop */
      sndrv_pcm_uframes_t silence_threshold;    /* min distance from noise for silence filling */
      sndrv_pcm_uframes_t silence_size;   /* silence block size */
      sndrv_pcm_uframes_t boundary;       /* pointers wrap point */
      unsigned char reserved[64];         /* reserved for future */
};

struct sndrv_pcm_channel_info {
      unsigned int channel;
      off_t offset;                 /* mmap offset */
      unsigned int first;           /* offset to first sample in bits */
      unsigned int step;            /* samples distance in bits */
};

struct sndrv_pcm_status {
      enum sndrv_pcm_state state;   /* stream state */
      struct timespec trigger_tstamp;     /* time when stream was started/stopped/paused */
      struct timespec tstamp;       /* reference timestamp */
      sndrv_pcm_uframes_t appl_ptr; /* appl ptr */
      sndrv_pcm_uframes_t hw_ptr;   /* hw ptr */
      sndrv_pcm_sframes_t delay;    /* current delay in frames */
      sndrv_pcm_uframes_t avail;    /* number of frames available */
      sndrv_pcm_uframes_t avail_max;      /* max frames available on hw since last status */
      sndrv_pcm_uframes_t overrange;      /* count of ADC (capture) overrange detections from last status */
      enum sndrv_pcm_state suspended_state; /* suspended stream state */
      unsigned char reserved[60];   /* must be filled with zero */
};

struct sndrv_pcm_mmap_status {
      enum sndrv_pcm_state state;   /* RO: state - SNDRV_PCM_STATE_XXXX */
      int pad1;               /* Needed for 64 bit alignment */
      sndrv_pcm_uframes_t hw_ptr;   /* RO: hw ptr (0...boundary-1) */
      struct timespec tstamp;       /* Timestamp */
      enum sndrv_pcm_state suspended_state; /* RO: suspended stream state */
};

struct sndrv_pcm_mmap_control {
      sndrv_pcm_uframes_t appl_ptr; /* RW: appl ptr (0...boundary-1) */
      sndrv_pcm_uframes_t avail_min;      /* RW: min available frames for wakeup */
};

#define SNDRV_PCM_SYNC_PTR_HWSYNC   (1<<0)      /* execute hwsync */
#define SNDRV_PCM_SYNC_PTR_APPL           (1<<1)      /* get appl_ptr from driver (r/w op) */
#define SNDRV_PCM_SYNC_PTR_AVAIL_MIN      (1<<2)      /* get avail_min from driver */

struct sndrv_pcm_sync_ptr {
      unsigned int flags;
      union {
            struct sndrv_pcm_mmap_status status;
            unsigned char reserved[64];
      } s;
      union {
            struct sndrv_pcm_mmap_control control;
            unsigned char reserved[64];
      } c;
};

struct sndrv_xferi {
      sndrv_pcm_sframes_t result;
      void __user *buf;
      sndrv_pcm_uframes_t frames;
};

struct sndrv_xfern {
      sndrv_pcm_sframes_t result;
      void __user * __user *bufs;
      sndrv_pcm_uframes_t frames;
};

enum {
      SNDRV_PCM_IOCTL_PVERSION = _IOR('A', 0x00, int),
      SNDRV_PCM_IOCTL_INFO = _IOR('A', 0x01, struct sndrv_pcm_info),
      SNDRV_PCM_IOCTL_TSTAMP = _IOW('A', 0x02, int),
      SNDRV_PCM_IOCTL_HW_REFINE = _IOWR('A', 0x10, struct sndrv_pcm_hw_params),
      SNDRV_PCM_IOCTL_HW_PARAMS = _IOWR('A', 0x11, struct sndrv_pcm_hw_params),
      SNDRV_PCM_IOCTL_HW_FREE = _IO('A', 0x12),
      SNDRV_PCM_IOCTL_SW_PARAMS = _IOWR('A', 0x13, struct sndrv_pcm_sw_params),
      SNDRV_PCM_IOCTL_STATUS = _IOR('A', 0x20, struct sndrv_pcm_status),
      SNDRV_PCM_IOCTL_DELAY = _IOR('A', 0x21, sndrv_pcm_sframes_t),
      SNDRV_PCM_IOCTL_HWSYNC = _IO('A', 0x22),
      SNDRV_PCM_IOCTL_SYNC_PTR = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr),
      SNDRV_PCM_IOCTL_CHANNEL_INFO = _IOR('A', 0x32, struct sndrv_pcm_channel_info),
      SNDRV_PCM_IOCTL_PREPARE = _IO('A', 0x40),
      SNDRV_PCM_IOCTL_RESET = _IO('A', 0x41),
      SNDRV_PCM_IOCTL_START = _IO('A', 0x42),
      SNDRV_PCM_IOCTL_DROP = _IO('A', 0x43),
      SNDRV_PCM_IOCTL_DRAIN = _IO('A', 0x44),
      SNDRV_PCM_IOCTL_PAUSE = _IOW('A', 0x45, int),
      SNDRV_PCM_IOCTL_REWIND = _IOW('A', 0x46, sndrv_pcm_uframes_t),
      SNDRV_PCM_IOCTL_RESUME = _IO('A', 0x47),
      SNDRV_PCM_IOCTL_XRUN = _IO('A', 0x48),
      SNDRV_PCM_IOCTL_FORWARD = _IOW('A', 0x49, sndrv_pcm_uframes_t),
      SNDRV_PCM_IOCTL_WRITEI_FRAMES = _IOW('A', 0x50, struct sndrv_xferi),
      SNDRV_PCM_IOCTL_READI_FRAMES = _IOR('A', 0x51, struct sndrv_xferi),
      SNDRV_PCM_IOCTL_WRITEN_FRAMES = _IOW('A', 0x52, struct sndrv_xfern),
      SNDRV_PCM_IOCTL_READN_FRAMES = _IOR('A', 0x53, struct sndrv_xfern),
      SNDRV_PCM_IOCTL_LINK = _IOW('A', 0x60, int),
      SNDRV_PCM_IOCTL_UNLINK = _IO('A', 0x61),
};

/* Trick to make alsa-lib/acinclude.m4 happy */
#define SNDRV_PCM_IOCTL_REWIND SNDRV_PCM_IOCTL_REWIND

/*****************************************************************************
 *                                                                           *
 *                            MIDI v1.0 interface                            *
 *                                                                           *
 *****************************************************************************/

/*
 *  Raw MIDI section - /dev/snd/midi??
 */

#define SNDRV_RAWMIDI_VERSION       SNDRV_PROTOCOL_VERSION(2, 0, 0)

enum sndrv_rawmidi_stream {
      SNDRV_RAWMIDI_STREAM_OUTPUT = 0,
      SNDRV_RAWMIDI_STREAM_INPUT,
      SNDRV_RAWMIDI_STREAM_LAST = SNDRV_RAWMIDI_STREAM_INPUT,
};

#define SNDRV_RAWMIDI_INFO_OUTPUT         0x00000001
#define SNDRV_RAWMIDI_INFO_INPUT          0x00000002
#define SNDRV_RAWMIDI_INFO_DUPLEX         0x00000004

struct sndrv_rawmidi_info {
      unsigned int device;          /* RO/WR (control): device number */
      unsigned int subdevice;       /* RO/WR (control): subdevice number */
      enum sndrv_rawmidi_stream stream; /* WR: stream */
      int card;               /* R: card number */
      unsigned int flags;           /* SNDRV_RAWMIDI_INFO_XXXX */
      unsigned char id[64];         /* ID (user selectable) */
      unsigned char name[80];       /* name of device */
      unsigned char subname[32];    /* name of active or selected subdevice */
      unsigned int subdevices_count;
      unsigned int subdevices_avail;
      unsigned char reserved[64];   /* reserved for future use */
};

struct sndrv_rawmidi_params {
      enum sndrv_rawmidi_stream stream;
      size_t buffer_size;           /* queue size in bytes */
      size_t avail_min;       /* minimum avail bytes for wakeup */
      unsigned int no_active_sensing: 1; /* do not send active sensing byte in close() */
      unsigned char reserved[16];   /* reserved for future use */
};

struct sndrv_rawmidi_status {
      enum sndrv_rawmidi_stream stream;
      struct timespec tstamp;       /* Timestamp */
      size_t avail;                 /* available bytes */
      size_t xruns;                 /* count of overruns since last status (in bytes) */
      unsigned char reserved[16];   /* reserved for future use */
};

enum {
      SNDRV_RAWMIDI_IOCTL_PVERSION = _IOR('W', 0x00, int),
      SNDRV_RAWMIDI_IOCTL_INFO = _IOR('W', 0x01, struct sndrv_rawmidi_info),
      SNDRV_RAWMIDI_IOCTL_PARAMS = _IOWR('W', 0x10, struct sndrv_rawmidi_params),
      SNDRV_RAWMIDI_IOCTL_STATUS = _IOWR('W', 0x20, struct sndrv_rawmidi_status),
      SNDRV_RAWMIDI_IOCTL_DROP = _IOW('W', 0x30, int),
      SNDRV_RAWMIDI_IOCTL_DRAIN = _IOW('W', 0x31, int),
};

/*
 *  Timer section - /dev/snd/timer
 */

#define SNDRV_TIMER_VERSION         SNDRV_PROTOCOL_VERSION(2, 0, 5)

enum sndrv_timer_class {
      SNDRV_TIMER_CLASS_NONE = -1,
      SNDRV_TIMER_CLASS_SLAVE = 0,
      SNDRV_TIMER_CLASS_GLOBAL,
      SNDRV_TIMER_CLASS_CARD,
      SNDRV_TIMER_CLASS_PCM,
      SNDRV_TIMER_CLASS_LAST = SNDRV_TIMER_CLASS_PCM,
};

/* slave timer classes */
enum sndrv_timer_slave_class {
      SNDRV_TIMER_SCLASS_NONE = 0,
      SNDRV_TIMER_SCLASS_APPLICATION,
      SNDRV_TIMER_SCLASS_SEQUENCER,       /* alias */
      SNDRV_TIMER_SCLASS_OSS_SEQUENCER,   /* alias */
      SNDRV_TIMER_SCLASS_LAST = SNDRV_TIMER_SCLASS_OSS_SEQUENCER,
};

/* global timers (device member) */
#define SNDRV_TIMER_GLOBAL_SYSTEM   0
#define SNDRV_TIMER_GLOBAL_RTC            1
#define SNDRV_TIMER_GLOBAL_HPET           2

/* info flags */
#define SNDRV_TIMER_FLG_SLAVE       (1<<0)      /* cannot be controlled */

struct sndrv_timer_id {
      enum sndrv_timer_class dev_class;   
      enum sndrv_timer_slave_class dev_sclass;
      int card;
      int device;
      int subdevice;
};

struct sndrv_timer_ginfo {
      struct sndrv_timer_id tid;    /* requested timer ID */
      unsigned int flags;           /* timer flags - SNDRV_TIMER_FLG_* */
      int card;               /* card number */
      unsigned char id[64];         /* timer identification */
      unsigned char name[80];       /* timer name */
      unsigned long reserved0;      /* reserved for future use */
      unsigned long resolution;     /* average period resolution in ns */
      unsigned long resolution_min; /* minimal period resolution in ns */
      unsigned long resolution_max; /* maximal period resolution in ns */
      unsigned int clients;         /* active timer clients */
      unsigned char reserved[32];
};

struct sndrv_timer_gparams {
      struct sndrv_timer_id tid;    /* requested timer ID */
      unsigned long period_num;     /* requested precise period duration (in seconds) - numerator */
      unsigned long period_den;     /* requested precise period duration (in seconds) - denominator */
      unsigned char reserved[32];
};

struct sndrv_timer_gstatus {
      struct sndrv_timer_id tid;    /* requested timer ID */
      unsigned long resolution;     /* current period resolution in ns */
      unsigned long resolution_num; /* precise current period resolution (in seconds) - numerator */
      unsigned long resolution_den; /* precise current period resolution (in seconds) - denominator */
      unsigned char reserved[32];
};

struct sndrv_timer_select {
      struct sndrv_timer_id id;     /* bind to timer ID */
      unsigned char reserved[32];   /* reserved */
};

struct sndrv_timer_info {
      unsigned int flags;           /* timer flags - SNDRV_TIMER_FLG_* */
      int card;               /* card number */
      unsigned char id[64];         /* timer identificator */
      unsigned char name[80];       /* timer name */
      unsigned long reserved0;      /* reserved for future use */
      unsigned long resolution;     /* average period resolution in ns */
      unsigned char reserved[64];   /* reserved */
};

#define SNDRV_TIMER_PSFLG_AUTO            (1<<0)      /* auto start, otherwise one-shot */
#define SNDRV_TIMER_PSFLG_EXCLUSIVE (1<<1)      /* exclusive use, precise start/stop/pause/continue */
#define SNDRV_TIMER_PSFLG_EARLY_EVENT     (1<<2)      /* write early event to the poll queue */

struct sndrv_timer_params {
      unsigned int flags;           /* flags - SNDRV_MIXER_PSFLG_* */
      unsigned int ticks;           /* requested resolution in ticks */
      unsigned int queue_size;      /* total size of queue (32-1024) */
      unsigned int reserved0;       /* reserved, was: failure locations */
      unsigned int filter;          /* event filter (bitmask of SNDRV_TIMER_EVENT_*) */
      unsigned char reserved[60];   /* reserved */
};

struct sndrv_timer_status {
      struct timespec tstamp;       /* Timestamp - last update */
      unsigned int resolution;      /* current period resolution in ns */
      unsigned int lost;            /* counter of master tick lost */
      unsigned int overrun;         /* count of read queue overruns */
      unsigned int queue;           /* used queue size */
      unsigned char reserved[64];   /* reserved */
};

enum {
      SNDRV_TIMER_IOCTL_PVERSION = _IOR('T', 0x00, int),
      SNDRV_TIMER_IOCTL_NEXT_DEVICE = _IOWR('T', 0x01, struct sndrv_timer_id),
      SNDRV_TIMER_IOCTL_TREAD = _IOW('T', 0x02, int),
      SNDRV_TIMER_IOCTL_GINFO = _IOWR('T', 0x03, struct sndrv_timer_ginfo),
      SNDRV_TIMER_IOCTL_GPARAMS = _IOW('T', 0x04, struct sndrv_timer_gparams),
      SNDRV_TIMER_IOCTL_GSTATUS = _IOWR('T', 0x05, struct sndrv_timer_gstatus),
      SNDRV_TIMER_IOCTL_SELECT = _IOW('T', 0x10, struct sndrv_timer_select),
      SNDRV_TIMER_IOCTL_INFO = _IOR('T', 0x11, struct sndrv_timer_info),
      SNDRV_TIMER_IOCTL_PARAMS = _IOW('T', 0x12, struct sndrv_timer_params),
      SNDRV_TIMER_IOCTL_STATUS = _IOR('T', 0x14, struct sndrv_timer_status),
      /* The following four ioctls are changed since 1.0.9 due to confliction */
      SNDRV_TIMER_IOCTL_START = _IO('T', 0xa0),
      SNDRV_TIMER_IOCTL_STOP = _IO('T', 0xa1),
      SNDRV_TIMER_IOCTL_CONTINUE = _IO('T', 0xa2),
      SNDRV_TIMER_IOCTL_PAUSE = _IO('T', 0xa3),
};

struct sndrv_timer_read {
      unsigned int resolution;
      unsigned int ticks;
};

enum sndrv_timer_event {
      SNDRV_TIMER_EVENT_RESOLUTION = 0,   /* val = resolution in ns */
      SNDRV_TIMER_EVENT_TICK,             /* val = ticks */
      SNDRV_TIMER_EVENT_START,            /* val = resolution in ns */
      SNDRV_TIMER_EVENT_STOP,             /* val = 0 */
      SNDRV_TIMER_EVENT_CONTINUE,         /* val = resolution in ns */
      SNDRV_TIMER_EVENT_PAUSE,            /* val = 0 */
      SNDRV_TIMER_EVENT_EARLY,            /* val = 0, early event */
      SNDRV_TIMER_EVENT_SUSPEND,          /* val = 0 */
      SNDRV_TIMER_EVENT_RESUME,           /* val = resolution in ns */
      /* master timer events for slave timer instances */
      SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
      SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
      SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
      SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
      SNDRV_TIMER_EVENT_MSUSPEND = SNDRV_TIMER_EVENT_SUSPEND + 10,
      SNDRV_TIMER_EVENT_MRESUME = SNDRV_TIMER_EVENT_RESUME + 10,
};

struct sndrv_timer_tread {
      enum sndrv_timer_event event;
      struct timespec tstamp;
      unsigned int val;
};

/****************************************************************************
 *                                                                          *
 *        Section for driver control interface - /dev/snd/control?          *
 *                                                                          *
 ****************************************************************************/

#define SNDRV_CTL_VERSION           SNDRV_PROTOCOL_VERSION(2, 0, 3)

struct sndrv_ctl_card_info {
      int card;               /* card number */
      int pad;                /* reserved for future (was type) */
      unsigned char id[16];         /* ID of card (user selectable) */
      unsigned char driver[16];     /* Driver name */
      unsigned char name[32];       /* Short name of soundcard */
      unsigned char longname[80];   /* name + info text about soundcard */
      unsigned char reserved_[16];  /* reserved for future (was ID of mixer) */
      unsigned char mixername[80];  /* visual mixer identification */
      unsigned char components[80]; /* card components / fine identification, delimited with one space (AC97 etc..) */
      unsigned char reserved[48];   /* reserved for future */
};

enum sndrv_ctl_elem_type {
      SNDRV_CTL_ELEM_TYPE_NONE = 0,       /* invalid */
      SNDRV_CTL_ELEM_TYPE_BOOLEAN,        /* boolean type */
      SNDRV_CTL_ELEM_TYPE_INTEGER,        /* integer type */
      SNDRV_CTL_ELEM_TYPE_ENUMERATED,           /* enumerated type */
      SNDRV_CTL_ELEM_TYPE_BYTES,          /* byte array */
      SNDRV_CTL_ELEM_TYPE_IEC958,         /* IEC958 (S/PDIF) setup */
      SNDRV_CTL_ELEM_TYPE_INTEGER64,            /* 64-bit integer type */
      SNDRV_CTL_ELEM_TYPE_LAST = SNDRV_CTL_ELEM_TYPE_INTEGER64,
};

enum sndrv_ctl_elem_iface {
      SNDRV_CTL_ELEM_IFACE_CARD = 0,            /* global control */
      SNDRV_CTL_ELEM_IFACE_HWDEP,         /* hardware dependent device */
      SNDRV_CTL_ELEM_IFACE_MIXER,         /* virtual mixer device */
      SNDRV_CTL_ELEM_IFACE_PCM,           /* PCM device */
      SNDRV_CTL_ELEM_IFACE_RAWMIDI,       /* RawMidi device */
      SNDRV_CTL_ELEM_IFACE_TIMER,         /* timer device */
      SNDRV_CTL_ELEM_IFACE_SEQUENCER,           /* sequencer client */
      SNDRV_CTL_ELEM_IFACE_LAST = SNDRV_CTL_ELEM_IFACE_SEQUENCER,
};

#define SNDRV_CTL_ELEM_ACCESS_READ        (1<<0)
#define SNDRV_CTL_ELEM_ACCESS_WRITE       (1<<1)
#define SNDRV_CTL_ELEM_ACCESS_READWRITE         (SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
#define SNDRV_CTL_ELEM_ACCESS_VOLATILE          (1<<2)      /* control value may be changed without a notification */
#define SNDRV_CTL_ELEM_ACCESS_TIMESTAMP         (1<<2)      /* when was control changed */
#define SNDRV_CTL_ELEM_ACCESS_INACTIVE          (1<<8)      /* control does actually nothing, but may be updated */
#define SNDRV_CTL_ELEM_ACCESS_LOCK        (1<<9)      /* write lock */
#define SNDRV_CTL_ELEM_ACCESS_OWNER       (1<<10)     /* write lock owner */
#define SNDRV_CTL_ELEM_ACCESS_USER        (1<<29) /* user space element */
#define SNDRV_CTL_ELEM_ACCESS_DINDIRECT         (1<<30)     /* indirect access for matrix dimensions in the info structure */
#define SNDRV_CTL_ELEM_ACCESS_INDIRECT          (1<<31)     /* indirect access for element value in the value structure */

/* for further details see the ACPI and PCI power management specification */
#define SNDRV_CTL_POWER_D0          0x0000      /* full On */
#define SNDRV_CTL_POWER_D1          0x0100      /* partial On */
#define SNDRV_CTL_POWER_D2          0x0200      /* partial On */
#define SNDRV_CTL_POWER_D3          0x0300      /* Off */
#define SNDRV_CTL_POWER_D3hot       (SNDRV_CTL_POWER_D3|0x0000)   /* Off, with power */
#define SNDRV_CTL_POWER_D3cold            (SNDRV_CTL_POWER_D3|0x0001)   /* Off, without power */

struct sndrv_ctl_elem_id {
      unsigned int numid;           /* numeric identifier, zero = invalid */
      enum sndrv_ctl_elem_iface iface; /* interface identifier */
      unsigned int device;          /* device/client number */
      unsigned int subdevice;       /* subdevice (substream) number */
        unsigned char name[44];           /* ASCII name of item */
      unsigned int index;           /* index of item */
};

struct sndrv_ctl_elem_list {
      unsigned int offset;          /* W: first element ID to get */
      unsigned int space;           /* W: count of element IDs to get */
      unsigned int used;            /* R: count of element IDs set */
      unsigned int count;           /* R: count of all elements */
      struct sndrv_ctl_elem_id __user *pids; /* R: IDs */
      unsigned char reserved[50];
};

struct sndrv_ctl_elem_info {
      struct sndrv_ctl_elem_id id;  /* W: element ID */
      enum sndrv_ctl_elem_type type;      /* R: value type - SNDRV_CTL_ELEM_TYPE_* */
      unsigned int access;          /* R: value access (bitmask) - SNDRV_CTL_ELEM_ACCESS_* */
      unsigned int count;           /* count of values */
      pid_t owner;                  /* owner's PID of this control */
      union {
            struct {
                  long min;         /* R: minimum value */
                  long max;         /* R: maximum value */
                  long step;        /* R: step (0 variable) */
            } integer;
            struct {
                  long long min;          /* R: minimum value */
                  long long max;          /* R: maximum value */
                  long long step;         /* R: step (0 variable) */
            } integer64;
            struct {
                  unsigned int items;     /* R: number of items */
                  unsigned int item;      /* W: item number */
                  char name[64];          /* R: value name */
            } enumerated;
            unsigned char reserved[128];
      } value;
      union {
            unsigned short d[4];          /* dimensions */
            unsigned short *d_ptr;        /* indirect */
      } dimen;
      unsigned char reserved[64-4*sizeof(unsigned short)];
};

struct sndrv_ctl_elem_value {
      struct sndrv_ctl_elem_id id;  /* W: element ID */
      unsigned int indirect: 1;     /* W: use indirect pointer (xxx_ptr member) */
        union {
            union {
                  long value[128];
                  long *value_ptr;
            } integer;
            union {
                  long long value[64];
                  long long *value_ptr;
            } integer64;
            union {
                  unsigned int item[128];
                  unsigned int *item_ptr;
            } enumerated;
            union {
                  unsigned char data[512];
                  unsigned char *data_ptr;
            } bytes;
            struct sndrv_aes_iec958 iec958;
        } value;                /* RO */
      struct timespec tstamp;
        unsigned char reserved[128-sizeof(struct timespec)];
};

enum {
      SNDRV_CTL_IOCTL_PVERSION = _IOR('U', 0x00, int),
      SNDRV_CTL_IOCTL_CARD_INFO = _IOR('U', 0x01, struct sndrv_ctl_card_info),
      SNDRV_CTL_IOCTL_ELEM_LIST = _IOWR('U', 0x10, struct sndrv_ctl_elem_list),
      SNDRV_CTL_IOCTL_ELEM_INFO = _IOWR('U', 0x11, struct sndrv_ctl_elem_info),
      SNDRV_CTL_IOCTL_ELEM_READ = _IOWR('U', 0x12, struct sndrv_ctl_elem_value),
      SNDRV_CTL_IOCTL_ELEM_WRITE = _IOWR('U', 0x13, struct sndrv_ctl_elem_value),
      SNDRV_CTL_IOCTL_ELEM_LOCK = _IOW('U', 0x14, struct sndrv_ctl_elem_id),
      SNDRV_CTL_IOCTL_ELEM_UNLOCK = _IOW('U', 0x15, struct sndrv_ctl_elem_id),
      SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS = _IOWR('U', 0x16, int),
      SNDRV_CTL_IOCTL_ELEM_ADD = _IOWR('U', 0x17, struct sndrv_ctl_elem_info),
      SNDRV_CTL_IOCTL_ELEM_REPLACE = _IOWR('U', 0x18, struct sndrv_ctl_elem_info),
      SNDRV_CTL_IOCTL_ELEM_REMOVE = _IOWR('U', 0x19, struct sndrv_ctl_elem_id),
      SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE = _IOWR('U', 0x20, int),
      SNDRV_CTL_IOCTL_HWDEP_INFO = _IOR('U', 0x21, struct sndrv_hwdep_info),
      SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE = _IOR('U', 0x30, int),
      SNDRV_CTL_IOCTL_PCM_INFO = _IOWR('U', 0x31, struct sndrv_pcm_info),
      SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE = _IOW('U', 0x32, int),
      SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE = _IOWR('U', 0x40, int),
      SNDRV_CTL_IOCTL_RAWMIDI_INFO = _IOWR('U', 0x41, struct sndrv_rawmidi_info),
      SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE = _IOW('U', 0x42, int),
      SNDRV_CTL_IOCTL_POWER = _IOWR('U', 0xd0, int),
      SNDRV_CTL_IOCTL_POWER_STATE = _IOR('U', 0xd1, int),
};

/*
 *  Read interface.
 */

enum sndrv_ctl_event_type {
      SNDRV_CTL_EVENT_ELEM = 0,
      SNDRV_CTL_EVENT_LAST = SNDRV_CTL_EVENT_ELEM,
};

#define SNDRV_CTL_EVENT_MASK_VALUE  (1<<0)      /* element value was changed */
#define SNDRV_CTL_EVENT_MASK_INFO   (1<<1)      /* element info was changed */
#define SNDRV_CTL_EVENT_MASK_ADD    (1<<2)      /* element was added */
#define SNDRV_CTL_EVENT_MASK_REMOVE (~0U) /* element was removed */

struct sndrv_ctl_event {
      enum sndrv_ctl_event_type type;     /* event type - SNDRV_CTL_EVENT_* */
      union {
            struct {
                  unsigned int mask;
                  struct sndrv_ctl_elem_id id;
            } elem;
                unsigned char data8[60];
        } data;
};

/*
 *  Control names
 */

#define SNDRV_CTL_NAME_NONE                     ""
#define SNDRV_CTL_NAME_PLAYBACK                       "Playback "
#define SNDRV_CTL_NAME_CAPTURE                        "Capture "

#define SNDRV_CTL_NAME_IEC958_NONE              ""
#define SNDRV_CTL_NAME_IEC958_SWITCH                  "Switch"
#define SNDRV_CTL_NAME_IEC958_VOLUME                  "Volume"
#define SNDRV_CTL_NAME_IEC958_DEFAULT                 "Default"
#define SNDRV_CTL_NAME_IEC958_MASK              "Mask"
#define SNDRV_CTL_NAME_IEC958_CON_MASK                "Con Mask"
#define SNDRV_CTL_NAME_IEC958_PRO_MASK                "Pro Mask"
#define SNDRV_CTL_NAME_IEC958_PCM_STREAM        "PCM Stream"
#define SNDRV_CTL_NAME_IEC958(expl,direction,what)    "IEC958 " expl SNDRV_CTL_NAME_##direction SNDRV_CTL_NAME_IEC958_##what

/*
 *
 */

struct sndrv_xferv {
      const struct iovec *vector;
      unsigned long count;
};

enum {
      SNDRV_IOCTL_READV = _IOW('K', 0x00, struct sndrv_xferv),
      SNDRV_IOCTL_WRITEV = _IOW('K', 0x01, struct sndrv_xferv),
};

#endif /* __SOUND_ASOUND_H */

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