ctamixer.h

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#ifndef CTAMIXER_H
#define CTAMIXER_H

#include "ctresource.h"
#include <linux/spinlock.h>

/* Define the descriptor of a summation node resource */
struct sum {
    struct rsc rsc;     /* Basic resource info */
    unsigned char idx[8];
};

/* Define sum resource request description info */
struct sum_desc {
    unsigned int msr;
};

struct sum_mgr {
    struct rsc_mgr mgr; /* Basic resource manager info */
    spinlock_t mgr_lock;

     /* request one sum resource */
    int (*get_sum)(struct sum_mgr *mgr,
            const struct sum_desc *desc, struct sum **rsum);
    /* return one sum resource */
    int (*put_sum)(struct sum_mgr *mgr, struct sum *sum);
};

/* Constructor and destructor of daio resource manager */
int sum_mgr_create(void *hw, struct sum_mgr **rsum_mgr);
int sum_mgr_destroy(struct sum_mgr *sum_mgr);

/* Define the descriptor of a amixer resource */
struct amixer_rsc_ops;

struct amixer {
    struct rsc rsc;     /* Basic resource info */
    unsigned char idx[8];
    struct rsc *input;  /* pointer to a resource acting as source */
    struct sum *sum;    /* Put amixer output to this summation node */
    struct amixer_rsc_ops *ops; /* AMixer specific operations */
};

struct amixer_rsc_ops {
    int (*set_input)(struct amixer *amixer, struct rsc *rsc);
    int (*set_scale)(struct amixer *amixer, unsigned int scale);
    int (*set_invalid_squash)(struct amixer *amixer, unsigned int iv);
    int (*set_sum)(struct amixer *amixer, struct sum *sum);
    int (*commit_write)(struct amixer *amixer);
    /* Only for interleaved recording */
    int (*commit_raw_write)(struct amixer *amixer);
    int (*setup)(struct amixer *amixer, struct rsc *input,
            unsigned int scale, struct sum *sum);
    int (*get_scale)(struct amixer *amixer);
};

/* Define amixer resource request description info */
struct amixer_desc {
    unsigned int msr;
};

struct amixer_mgr {
    struct rsc_mgr mgr; /* Basic resource manager info */
    spinlock_t mgr_lock;

     /* request one amixer resource */
    int (*get_amixer)(struct amixer_mgr *mgr,
              const struct amixer_desc *desc,
              struct amixer **ramixer);
    /* return one amixer resource */
    int (*put_amixer)(struct amixer_mgr *mgr, struct amixer *amixer);
};

/* Constructor and destructor of amixer resource manager */
int amixer_mgr_create(void *hw, struct amixer_mgr **ramixer_mgr);
int amixer_mgr_destroy(struct amixer_mgr *amixer_mgr);

#endif /* CTAMIXER_H */