102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*
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* $Header: bsd_audioirig.h,v 1.0 93/08/02 12:42:00
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*/
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#ifndef _BSD_AUDIOIRIG_H_
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#define _BSD_AUDIOIRIG_H_
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#include <sys/time.h>
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/********************************************************************/
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/* user interface */
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/*
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* irig ioctls
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*/
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#if defined(__STDC__) || (!defined(sun) && !defined(ibm032) && !defined(__GNUC))
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#define AUDIO_IRIG_OPEN _IO('A', 50)
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#define AUDIO_IRIG_CLOSE _IO('A', 51)
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#define AUDIO_IRIG_SETFORMAT _IOWR('A', 52, int)
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#else
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#define AUDIO_IRIG_OPEN _IO(A, 50)
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#define AUDIO_IRIG_CLOSE _IO(A, 51)
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#define AUDIO_IRIG_SETFORMAT _IOWR(A, 52, int)
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#endif
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/*
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* irig error codes
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*/
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#define AUDIO_IRIG_BADSIGNAL 0x01
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#define AUDIO_IRIG_BADDATA 0x02
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#define AUDIO_IRIG_BADSYNC 0x04
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#define AUDIO_IRIG_BADCLOCK 0x08
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#define AUDIO_IRIG_OLDDATA 0x10
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/********************************************************************/
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/*
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* auib definitions
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*/
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#define AUIB_SIZE (0x0040)
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#define AUIB_INC (0x0008)
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#define AUIB_MOD(k) ((k) & 0x0038)
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#define AUIB_INIT(ib) ((ib)->ib_head = (ib)->ib_tail = (ib)->ib_lock = \
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(ib)->phase = (ib)->shi = (ib)->slo = (ib)->high = \
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(ib)->level0 = (ib)->level1 = \
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(ib)->shift[0] = (ib)->shift[1] = (ib)->shift[2] = \
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(ib)->shift[3] = (ib)->sdata[0] = (ib)->sdata[1] = \
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(ib)->sdata[2] = (ib)->sdata[3] = (ib)->err = 0)
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#define AUIB_EMPTY(ib) ((ib)->ib_head == (ib)->ib_tail)
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#define AUIB_LEN(ib) (AUIB_MOD((ib)->ib_tail - (ib)->ib_head))
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#define AUIB_LEFT(ib) (AUIB_MOD((ib)->ib_head - (ib)->ib_tail - 1))
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#define IRIGDELAY 3
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#define IRIGLEVEL 1355
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#ifndef LOCORE
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/*
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* irig_time holds IRIG data for one second
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*/
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struct irig_time {
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struct timeval stamp; /* timestamp */
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u_char bits[13]; /* 100 irig data bits */
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u_char status; /* status byte */
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char time[14]; /* time string */
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};
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/*
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* auib's are used for IRIG data communication between the trap
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* handler and the software interrupt.
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*/
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struct auib {
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/* driver variables */
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u_short active; /* 0=inactive, else=active */
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u_short format; /* time output format */
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struct irig_time timestr; /* time structure */
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char buffer[14]; /* output formation buffer */
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/* hardware interrupt variables */
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struct timeval tv1,tv2,tv3; /* time stamps (median filter) */
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int level0,level1; /* lo/hi input levels */
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int level; /* decision level */
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int high; /* recent largest sample */
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int sl0,sl1; /* recent sample levels */
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int lasts; /* last sample value */
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u_short scount; /* sample count */
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u_long eacc; /* 10-bit element accumulator */
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u_long ebit; /* current bit in element */
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u_char r_level,mmr1; /* recording level 0-255 */
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int shi,slo,phase; /* AGC variables */
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u_long err; /* error status bits */
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int ecount; /* count of elements this second */
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long shift[4]; /* shift register of pos ident */
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long sdata[4]; /* shift register of symbols */
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int ib_head; /* queue head */
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int ib_tail; /* queue tail */
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u_short ib_lock; /* queue head lock */
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u_long ib_data[AUIB_SIZE]; /* data buffer */
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};
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#endif
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#endif /* _BSD_AUDIOIRIG_H_ */
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