File: vol.h

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#ifndef __VOL_H
#define __VOL_H

struct ocpvolstruct
{
	int val,               /* the current value */
	    min,               /* the minimal value */
	    max,               /* the maximal value */
	    step,              /* stepping */
	    log;               /* log scale? (not yet supported) */
	const char *name;
};

/* min<=val<=max !! */
/* (max-min)%step==0 !! */

struct ocpvolregstruct
{
	int (*GetVolumes)(void);                   /* returns the number of setable volumes */
	int (*GetVolume)(struct ocpvolstruct *, int);  /* gets a volume (min, max, step and log should be same on every call!) */
	int (*SetVolume)(struct ocpvolstruct *, int);  /* sets a volume (only val should be changed!) */
};

#endif