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/* Copyright (c) Colorado School of Mines, 2003.*/
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/* All rights reserved. */
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/*-----------------------------------------------------------------------
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* segd.h - include file for SEGD traces
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* Version 2.1, 10/10/94, Marc Schaming
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* Version 2.2, 17/08/95, Celine Girard et Marc Schaming
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* Version 2.3, 04/1997, Marc Schaming
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* Version 2.4, 02/1998, Stewart A. Levin (SEP)
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* changed general_header_1.f to unsigned char[2]
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* changed non-struct typedefs to struct typedefs
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* to allow for uniform future expansion
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* Version 2.5, 02/2001, Stewart A. Levin (SEP)
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* Little endian fix up for channel_set_header.cs
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* and dem_trace_header,tn
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*
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* declarations for: 版本1 版本2
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* typedef struct {} segd_tape_label : 无 tape label
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* typedef struct {} segd_general_header_1 : general header 与1相同
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* typedef struct {} segd_general_header_2 : general header 与1相同
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* typedef struct {} segd_general_header_n : general header 与1相同
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* typedef struct {} segd_gen_head_sn358 : general header for sn358
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* typedef struct {} segd_channel_set_header: channel set descriptor 与1相同，29字节稍扩展
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* typedef struct {} segd_sample_skew : sample skew block
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* typedef struct {} segd_extended_header : extended header
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* typedef struct {} segd_external_header : external header
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* typedef struct {} segd_general_trailer : general trailer 与1相同
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* typedef struct {} segd_demux_trace_header: Demux trace header 与1相同
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* typedef struct {} segd_trace_header_ext : trace header extension 长度相同，做了扩展
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* typedef struct {} segd_general_trailer : general trailer 与1相同
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*
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*
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* Reference:
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* SEG Subcommitee on Digital Tape Formats, "Digital field tape format standards - SEG-D"
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*
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* Digital field tape format standards - SEG-D, REVISION 1 (1994) Geophysics, vol. 59, p.668-684
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*
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* 版本2中在开始位置比版本1多记录了128字节的磁带标签信息，指明了该磁带的一些记录参数和格式信息，
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* 其中5~9字节内容为“SD2.0”，说明为SegD版本2格式。
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*
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*---------------------------------------------------------------------*/
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namespace NSegD
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{
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//////////////////////////////////////////////////////////////////////
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//版本2增加的磁带头定义，在文件开始
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/*---------------- Tape Label --------------------------------------*/
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typedef struct stuSegDTapeLabel{
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unsigned char susn[4]; /* 01-04 Storage unit sequence number */
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unsigned char rev[5]; /* 05-09 SegD Revision ，必须为SD2.0，由此判断是否为2.0格式 */
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unsigned char sus[6]; /* 10-15 Storage unit structure */
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unsigned char ba[4]; /* 16-19 Binding addition */
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unsigned char mbs[10]; /* 20-29 Maximum block size */
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unsigned char acode[10];/* 30-39 API Producer organization code */
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unsigned char cdate[11];/* 40-50 Creation date */
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unsigned char sn[12]; /* 51-62 Serial number */
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unsigned char res[6]; /* 63-68 Reserved */
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//Storage set identifier 60个字节
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unsigned char eln[12]; /* 69-80 External Label Name */
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unsigned char ren[24]; /* 81-104 Recording Entity Name */
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unsigned char ud[14]; /* 105-118 User defined */
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unsigned char msr[10]; /* 119-128 Max shot records per field record */
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} SEGD_TAPE_LABEL;
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//头段块包括至少两个通用头段，一个或多个扫描类型头段以及可选的
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// 扩展头段、外部头段，其大小均为32字节
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//
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//
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// -----------------------------------------------------------------------------------
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// | | | | | | | |
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// | 通用头1 | 通用头2 | 通用头 | 通道 | 通道 | 通道 | ... |
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// | | | (可选) | 设置1 | 设置2 | 设置3 | |
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// -----------------------------------------------------------------------------------
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// | 32字节 | 32B | 32 | 32 | 32 | 32 | ... |
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// 个数由头1
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// 中定义
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/*---------------- General header block #1 -------------------------*/
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typedef struct stuSegDGeneralHeader1{
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unsigned char f[2]; /* 01-02 File number (0-9999) 文件号，
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如果超出9999范围，由该处为FFFF，个数记录在头段2的第1~3字节处 */
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unsigned short fc; /* 03-04 Format code 格式代码 */
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char k1_k2; /* 05 General constants */
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char k3_k4; /* 06 General constants */
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char k5_k6; /* 07 General constants */
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char k7_k8; /* 08 General constants */
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char k9_k10; /* 09 General constants */
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char k11_k12; /* 10 General constants */
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unsigned char year; /* 11 Year (0-99) */
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unsigned char gh_day1;/* 12 Number blocks in general header 头段块的个数（高四位）*/
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/* 12 - day of year (x--) */
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unsigned char day; /* 13 Day of year (xx) */
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unsigned char hour; /* 14 Hour of day */
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unsigned char minute; /* 15 Minute of hour */
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unsigned char second; /* 16 Second of minute */
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unsigned char m[3]; /* 17 Manufacturer's code 生产商代码*/
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/* 18-19 and serial number */
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unsigned char b[3]; /* 20-22 Bytes per scan (multiplexed only) 每个扫描的字节数，仅时序时*/
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unsigned char i; /* 23 Base scan interval 采样间隔*/
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unsigned char p_sbx; /* 24 Polarity */
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/* 24 - Number of scans per block */
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unsigned char sb; /* 25 Number of scans per block */
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unsigned char z_r1; /* 26 Record type */
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/* 26 - Record length 记录长度，还可定义在头段2中的15~17字节*/
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unsigned char r; /* 27 Record length */
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unsigned char str; /* 28 Scan types per record 扫描类型个数 */
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unsigned char cs; /* 29 Channels sets per scan type 每个扫描类型中的道组数，
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表示范围为0~99，如果大于99时，则记录在头段2的4、5字节上*/
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unsigned char sk; /* 30 Sample Skew blocks 采样时偏头段个数，为0时表示没有*/
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unsigned char ec; /* 31 Extended header length 扩展头段个数，
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表示范围为0~99，如果扩展头个数超过99个时，则该字节内容为FF，
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个数记录在头段2的第6、7字节上 */
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unsigned char ex; /* 32 External header length 外部头个数，
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表示范围0~99，超过时记录在头段2的8、9字节上*/
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} SEGD_GENERAL_HEADER_1;
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/*---------------- General header block #2 -------------------------*/
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typedef struct stuSegDGeneralHeader2{
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unsigned char ef[3]; /* 01-03 Extended file number */
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unsigned char en[2]; /* 04-05 Extended channel sets and scan types */
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unsigned char ecx[2]; /* 06-07 Extended header blocks 扩展头个数，仅当扩展头个数大于99时才使用*/
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unsigned char eh[2]; /* 08-09 external header blocks 外部头个数 */
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char x1; /* 10 undefined */
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unsigned char rev[2]; /* 11-12 SEG-D revision number */
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unsigned short gt; /* 13-14 General trailer number */
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unsigned char erl[3]; /* 15-17 Extended record length 扩展记录长度 */
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char x2; /* 18 undefined */
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unsigned char bn; /* 19 General header block number 通用头段块个数*/
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char x3[13]; /* 20-32 undefined */
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} SEGD_GENERAL_HEADER_2;
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/*---------------- General header block #n -------------------------*/
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typedef struct stuSegDGeneralHeaderN{
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char x1[3]; /* 01-03 undefined */
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unsigned char sln[5]; /* 04-08 Source line number，4-5为整数部分，7-8为小数部分 */
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unsigned char spn[5]; /* 09-13 Source point number，9-11为整数部分，12-13为小数部分 */
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unsigned char spi; /* 14 Source point index */
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unsigned char pc; /* 15 Phase control */
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unsigned char v; /* 16 Type vibrator */
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short pa; /* 17-18 Phase angle */
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unsigned char bn; /* 19 General header block number */
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unsigned char ss; /* 20 Source set number */
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char x2[12]; /* 21-32 undefined */
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} SEGD_GENERAL_HEADER_N;
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/*---------------- General header extension (Sercel SN358) ---------*/
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typedef struct stuSegDGeneralHeaderSN358{
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unsigned char fc1; /* 01 first and last channel of seismic param 1 */
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unsigned char lc1; /* 01-02 last channel of seismic param 1 */
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unsigned char fc2; /* 03-04 first channel of seismic param 2 */
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unsigned char f_lc2; /* 03-04 first and last channel of seismic param 2 */
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unsigned char lc2; /* 04-05 last channel of seismic param 2 */
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unsigned char fc3; /* 06-07 first channel of seismic param 3 */
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unsigned char f_lc3; /* 07 fist and last channel of seismic param 3 */
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unsigned char lc3; /* 07-08 last channel of seismic param 3 */
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unsigned char fc4; /* 09-10 first channel of seismic param 4 */
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unsigned char f_lc4; /* 10 first and last channel of seismic param 4 */
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unsigned char lc4; /* 10-11 fist channel of seismic param 4 */
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unsigned char f_lac1; /* 12 first and last aux channel of scan type 1 */
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unsigned char fsc1; /* 13-14 first seismic channel of scan type 1 */
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unsigned char f_lsc1; /* 14 first and last seismic channel of scan type 1 */
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unsigned char lsc1; /* 14-15 last seismic channel of scan type 1 */
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unsigned char sam_int1; /* 16 sample interval of scan type 1 */
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unsigned char fac2; /* 17 first and last aux channel of scan type 2 */
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unsigned char fsc2; /* 18-19 first seismic channel of scan type 2 */
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unsigned char f_lsc2; /* 19 first and last seismic channel of scan type 2 */
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unsigned char lsc2; /* 19-20 last seismic channel of scan type 2 */
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unsigned char sam_int2; /* 21 sample interval of scan type 2 */
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unsigned char bl_sig_le; /* 22 block signature length (n*0.1 s) */
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unsigned char rec_length[2]; /* 23-24 record length n*0.1 s (00.0-99.9) s */
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unsigned char dyn_swit_del[2]; /* 25-26 dynamically switching delay (00.0-99.9 s) */
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unsigned char rec_del[2]; /* 27-28 recording delay (00.0-99.9s) */
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unsigned char ty_a_cha12; /* 29 type of auxiliary channel 1, channel 2 */
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unsigned char ty_a_cha34; /* 30 type of auxiliary channel 3, channel 4 */
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unsigned char ty_a_cha56; /* 31 type of auxiliary channel 5, channel 6 */
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unsigned char ty_a_cha78; /* 32 type of auxiliary channel 7, channel 8 */
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unsigned char mode_num; /* 33 mode number */
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unsigned char an_sys_co; /* 34 analog sys count (1-2), tape transport num */
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unsigned char reel_num[2]; /* 35-36 reel number (0-9999) */
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unsigned char file_num[2]; /* 37-38 file logical number */
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unsigned char sp_num[2]; /* 39-40 shot point number */
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unsigned char lc_nf; /* 41 lc=0 lowcut fi. out, nf=0 notch fi. out */
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unsigned char fg_ic; /* 42 fg=1 fist fixed gain, ic=1 internal osc. */
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unsigned char of1; /* 43-45 oscillator frequency (0-9999.9 Hz) */
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unsigned char of2; /* 43-45 oscillator frequency (0-9999.9 Hz) */
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unsigned char of3; /* 43-45 oscillator frequency (0-9999.9 Hz) */
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unsigned char osc_att; /* 46 oscillator attenuator */
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unsigned char t_sig_ph; /* 47 test signal phase (1:+,0:-) */
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unsigned char m_gain; /* 48 main gain amplifier (0-15) 16: IFP */
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unsigned char dum[16]; /* 49-64 additional information */
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} SEGD_GEN_HEAD_SN358;
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/*---------------- Scan type header (Channel set descriptor ) ------*/
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typedef struct stdSegDChannelSetHeader{
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unsigned char st; /* 01 Scan type 扫描类型*/
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unsigned char cn; /* 02 Channel set number 道组号*/
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unsigned short tf; /* 03-04 Channel set start time 开始时间*/
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unsigned short te; /* 05-06 Channel set end time 结束时间*/
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unsigned char mp[2]; /* 07-08 Descaling exponent 反换算因子*/
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unsigned char cs[2]; /* 09-10 Channels in this channel set 本道组包含的道数*/
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unsigned char c; /* 11 Channel type identification */
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unsigned char sc_j; /* 12 Sample/channel gain 子样个数*/
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/* 12 - Gain control method 增益控制方式*/
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unsigned short af; /* 13-14 Alias filter frequency 去假频滤波器截止频率*/
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unsigned short as; /* 15-16 Alias filter slope 去假频滤波器陡度*/
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unsigned short lc; /* 17-18 Low cut filter frequency 低切滤波器截止频率*/
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unsigned short ls; /* 19-20 Low cut filter slope 低切滤波器陡度*/
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unsigned short nt[3]; /* 21-26 Notch filter frequency 陷波滤波器频率*/
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unsigned short ecs; /* 27-28 Extended channel set number 扩展道组号*/
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unsigned char efh; /* 29 Extended header flag 在版本2中有扩展*/
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unsigned char vs; /* 30 Vertical stack */
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unsigned char cab; /* 31 Streamer number */
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unsigned char ary; /* 32 Array forming */
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} SEGD_CHANNEL_SET_HEADER;
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/*---------------- Sample skew 采样时偏-------------------------------------*/
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//是指各道第一次采样时刻相对于第一次扫描开始时刻（即第一个计时字）的偏移
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typedef struct stuSegDSampleSkew {
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unsigned char skew[32];
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} SEGD_SAMPLE_SKEW;
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/*---------------- Extended header 扩展头---------------------------------*/
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typedef struct stuSegDExtendedHeader {
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unsigned char dummy[32];
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} SEGD_EXTENDED_HEADER;
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/*---------------- External header 外部头---------------------------------*/
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typedef struct stuSegDExternalHeader {
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unsigned char dummy[32];
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} SEGD_EXTERNAL_HEADER;
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//
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// -----------------------------------------------------------------------------------
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// | | | | | | | | |
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// | 道头 | 道头 | 道头 | 道头 | 道头 | 道头 | ... | 数据道 |
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// | | 扩展1 | 扩展2 | 扩展3 | 扩展4 | 扩展5 | | |
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// -----------------------------------------------------------------------------------
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// | 20字节 | 32B | 32 | 32 | 32 | 32 | ... | |
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//
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/*--------------- Demux trace header 道头------------------------------*/
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typedef struct stuSegDDemuxTraceHeader {
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unsigned char f[2]; /* 01-02 file number 文件号 */
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unsigned char st; /* 03 scan type (1-2) 扫描类型 */
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unsigned char cn; /* 04 channel set 道组数 */
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unsigned char tn[2]; /* 05-06 trace number 道号 */
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unsigned char t[3]; /* 07-09 timing word of the first sample if
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the data were written in the multiplexed format */
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unsigned char the; /* 10 trace header extensions 扩展道头的个数 */
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unsigned char ss; /* 11 sample skew of the first sample
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of the trace. It is a part of
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the fractional part of the base scan interval.
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Res :1/256 scan interval */
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unsigned char tr; /* 12 trace edit */
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unsigned char tw[3]; /* 13-15 time from time break to the end of
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the internal time break window (binary
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number, inc 1ms) */
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unsigned char en[2]; /* 16-17 extended channel set number */
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unsigned char efn[3]; /* 18-20 extended file number */
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} SEGD_DEMUX_TRACE_HEADER;
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/*---------------- Trace header extension 道头扩展--------------------------*/
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typedef struct stuSegDTraceHeaderExtension {
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unsigned char rln[3]; /* 01-03 Receiver line number 接收线号 */
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unsigned char rpn[3]; /* 04-06 Receiver point number 接收点号 */
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unsigned char rpi; /* 07 Receiver point index 接收点索引 */
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unsigned char nbs[3]; /* 08-10 Number of samples per traces 每道采样点个数*/
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//在Rev1中11-32没有定义
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//char x[22]; /* 11-32 undefined */
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//在Rev2中进行了扩展：
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unsigned char erln[5]; /* 11-15 Extended Receiver Line Number */
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unsigned char erpn[5]; /* 16-20 Extended Receiver Point Number */
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unsigned char sen; /* Sensor Type recorded on this trace */
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char x[11]; /* 22-32 undefined */
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} SEGD_TRACE_HEADER_EXT;
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/*---------------- General trailer ---------------------------------*/
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typedef struct stuSegDGeneralTrailer {
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unsigned short gt; /* 01-02 General trailer number */
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char x1[8]; /* 03-10 undefined */
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unsigned char c; /* 11 Channel type identification */
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char x2[21]; /* 12-32 undefined */
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} SEGD_GENERAL_TRAILER;
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}//namespace
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using namespace NSegD;
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