鱼嘴凉拖鞋图片:data structure used in alsa project

来源：百度文库编辑：九乡新闻网时间：2024/05/03 22:26:38

understand the data structure used in alsa project is the key to the full understanding of the entire project.
typedef struct _snd_config snd_config_t;

struct _snd_config {
   char *id;
   snd_config_type_t type;
   union {
       long integer;
       long long integer64;
       char *string;
       double real;
       const void *ptr;
       struct {
           struct list_head fields;
           int join;
       } compound;
   } u;
   struct list_head list;
   snd_config_t *father;
};

usage: the complete definition of sound card is stored in such structure

typedef struct _snd_config_update snd_config_update_t;

struct _snd_config_update {
    unsigned int count;
    struct finfo *finfo;
};

usage: this structure stored the file information of alsa definition

struct finfo {
    char *name;
    dev_t dev;    //typedef short dev_t
    ino_t ino;
    time_t mtime;
};
usage: this structure stored file name, device ,inode,created time,etc.

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