/* $Id: segyreel.h 12822 2014-01-31 23:39:56Z remko $
 *
 * From PASSCAL code base which is in the public domain
 * http://www.passcal.nmt.edu/
 *
 * SEGY REEL HEADER VARIABLES
 *
 * Edit F. Wobbe: use unsigned types for values that are known to be positive
 */

#pragma once
#ifndef SEGYREEL_H
#define SEGYREEL_H

typedef struct SEGYReel_header {
	int32_t  job;
	int32_t  line;
	int32_t  reel;

	uint16_t num_traces;     /* number of traces in this file */
	uint16_t num_aux;        /* number of auxiliary traces  */
	uint16_t sr;             /* sample rate (microseconds) this data */
	uint16_t fldsr;          /* field sample rate */
	uint16_t nsamp;          /* number of samples this data */
	uint16_t fsamp;          /* number of field samples DOES NOT APPLY FOR THIS DATA */

	uint16_t dsfc;           /* data sample format code 1 = IBM FP (taken from segy2sierra.c) */
	int16_t  mfold;          /* number of CDP traces   = 0 here */
	int16_t  sort;           /* sort code 1=as recorded */

	int16_t  vcode;          /* part of STANDARD SEGY */
	int16_t  sweep_start;    /* part of STANDARD SEGY */
	int16_t  sweep_end;      /* part of STANDARD SEGY */
	int16_t  sweep_len;      /* part of STANDARD SEGY */
	int16_t  sweep_type;     /* part of STANDARD SEGY */
	int16_t  sweep_chan;     /* part of STANDARD SEGY */

	int16_t  taper_start;    /* part of STANDARD SEGY */
	int16_t  taper_end;      /* part of STANDARD SEGY */
	int16_t  taper_type;     /* part of STANDARD SEGY */
	int16_t  correlated;     /* part of STANDARD SEGY */
	int16_t  bin_gain_recov; /* part of STANDARD SEGY */
	int16_t  amp_gain_recov; /* part of STANDARD SEGY */

	int16_t  measure;        /* 1 = meters, 2 = feet */
	int16_t  polarity;       /* 1 = reversed up=neg */

	int16_t  vibe_polarity;          /* part of STANDARD SEGY */
	int16_t  num_trace_per_file;     /* LDS */
	int16_t  mean_amp;               /* LDS */
	int16_t  attribute;              /* LDS */
	int16_t  domain;                 /* LDS */
	int16_t  instrument_type;        /* LDS */

	int16_t  creation_year;          /* USGS */
	int16_t  creation_month;         /* USGS */
	int16_t  creation_day_of_month;  /* USGS */
	int16_t  dummy[162];             /* unassigned */
} SEGYREEL;

#endif /* !SEGYREEL_H */