94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
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/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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enum {
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master_chan = 0x00,
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Speed_control = 0x00,
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/* Items below are defined by USB standard: */
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Mute_control = 0x01,
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Volume_control = 0x02,
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Bass_control = 0x03,
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Mid_control = 0x04,
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Treble_control = 0x05,
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Equalizer_control = 0x06,
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Agc_control = 0x07,
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Delay_control = 0x08,
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Bassboost_control = 0x09,
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Loudness_control = 0x0a,
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/* Items below are defined by implementation: */
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Channel_control = 0x0b,
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Resolution_control = 0x0c,
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Ncontrol,
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Selector_control = 0x0d,
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sampling_freq_control = 0x01,
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Audiocsp = 0x000101, /* audio.control.0 */
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AUDIO_INTERFACE = 0x24,
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AUDIO_ENDPOINT = 0x25,
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};
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#define AS_GENERAL 1
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#define FORMAT_TYPE 2
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#define FORMAT_SPECIFIC 3
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#define PCM 1
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#define PCM8 2
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#define IEEE_FLOAT 3
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#define ALAW 4
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#define MULAW 5
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#define SAMPLING_FREQ_CONTROL 0x01
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typedef struct Audioalt Audioalt;
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struct Audioalt {
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int nchan;
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int res;
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int subframesize;
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int minfreq, maxfreq; /* continuous freqs */
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int freqs[8]; /* discrete freqs */
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int caps; /* see below for meanings */
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};
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enum {
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/* Audioalt->caps bits */
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has_setspeed = 0x1, /* has a speed_set command */
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has_pitchset = 0x2, /* has a pitch_set command */
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has_contfreq = 0x4, /* frequency continuously variable */
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has_discfreq = 0x8, /* discrete set of frequencies */
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onefreq = 0x10, /* only one frequency */
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maxpkt_only = 0x80, /* packets must be padded to max size */
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};
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typedef uint8_t byte;
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extern int setrec;
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extern int verbose;
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extern int defaultspeed[2];
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extern Dev *ad;
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extern Dev *buttondev;
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extern Channel *controlchan;
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extern Dev *epdev[2];
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void audio_interface(Dev *d, Desc *dd);
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void setalt(Dev *d, int endpt, int value);
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int getalt(Dev *d, int endpt);
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int setspeed(int rec, int speed);
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int setcontrol(int rec, char *name, int32_t *value);
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int getspecialcontrol(int rec, int ctl, int req, int32_t *value);
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int getcontrol(int rec, char *name, int32_t *value);
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int findalt(int rec, int nchan, int res, int speed);
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void getcontrols(void);
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void serve(void *);
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int nbchanprint(Channel *c, char *fmt, ...);
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int Aconv(Fmt *fp);
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