参照元

説明

参考

実装

struct snd_ctl_elem_info {
        struct snd_ctl_elem_id id;      /* W: element ID */
        snd_ctl_elem_type_t 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 */
        __kernel_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 */
                        __u64 names_ptr;        /* W: names list (ELEM_ADD only) */
                        unsigned int names_length;
                } enumerated;
                unsigned char reserved[128];
        } value;
        union {
                unsigned short d[4];            /* dimensions */
                unsigned short *d_ptr;          /* indirect - obsoleted */
        } dimen;
        unsigned char reserved[64-4*sizeof(unsigned short)];
};

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Last-modified: 2016-06-02 (木) 11:25:42