jehanne/sys/include/usb/audio.h

94 lines
2.4 KiB
C
Raw Normal View History

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
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 uint8_t 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, int32_t *value);
int getspecialcontrol(int rec, int ctl, int req, int32_t *value);
int getcontrol(int rec, char *name, int32_t *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);