Subversion Repositories planix.SVN

enum {
        master_chan             = 0x00,
        Speed_control           = 0x00,
        /* Items below are  defined by USB standard: */
        Mute_control            = 0x01,
        Volume_control          = 0x02,
        Bass_control            = 0x03,
        Mid_control             = 0x04,
        Treble_control          = 0x05,
        Equalizer_control       = 0x06,
        Agc_control             = 0x07,
        Delay_control           = 0x08,
        Bassboost_control       = 0x09,
        Loudness_control        = 0x0a,
        /* Items below are defined by implementation: */
        Channel_control         = 0x0b,
        Resolution_control      = 0x0c,
        Ncontrol,
        Selector_control        = 0x0d,

        sampling_freq_control   = 0x01,

        Audiocsp = 0x000101, /* audio.control.0 */

        AUDIO_INTERFACE = 0x24,
        AUDIO_ENDPOINT = 0x25,
};


#define AS_GENERAL 1
#define FORMAT_TYPE 2
#define FORMAT_SPECIFIC 3

#define PCM 1
#define PCM8 2
#define IEEE_FLOAT 3
#define ALAW 4
#define MULAW 5

#define SAMPLING_FREQ_CONTROL 0x01

typedef struct Audioalt Audioalt;

struct Audioalt {
        int             nchan;
        int             res;
        int             subframesize;
        int             minfreq, maxfreq;       /* continuous freqs */
        int             freqs[8];               /* discrete freqs */
        int             caps;           /* see below for meanings */
};

enum {
        /* Audioalt->caps bits */
        has_setspeed = 0x1,             /* has a speed_set command */
        has_pitchset = 0x2,             /* has a pitch_set command */
        has_contfreq = 0x4,             /* frequency continuously variable */
        has_discfreq = 0x8,             /* discrete set of frequencies */
        onefreq = 0x10,         /* only one frequency */
        maxpkt_only = 0x80,     /* packets must be padded to max size */
};

typedef uchar byte;

extern int setrec;
extern int verbose;
extern int defaultspeed[2];
extern Dev *ad;
extern Dev *buttondev;
extern Channel *controlchan;
extern Dev *epdev[2];

void    audio_interface(Dev *d, Desc *dd);
void    setalt(Dev *d, int endpt, int value);
int     getalt(Dev *d, int endpt);
int     setspeed(int rec, int speed);
int     setcontrol(int rec, char *name, long *value);
int     getspecialcontrol(int rec, int ctl, int req, long *value);
int     getcontrol(int rec, char *name, long *value);
int     findalt(int rec, int nchan, int res, int speed);
void    getcontrols(void);
void    serve(void *);
int     nbchanprint(Channel *c, char *fmt, ...);
int     Aconv(Fmt *fp);