hds_segy.hpp

/* hds_segy.hpp */
/* $Id$ */
#ifndef __hds_segy_hpp
#define __hds_segy_hpp

#include <vector>

#include <QIODevice>
#include <QString>


namespace hds
{
  class SEGY
  {
  public:

    enum Format
      {
    UNDEFINED = 0,
    IBM = 1,
    Int4 = 2,
    Int2 = 3,
    IEEE = 5
      };
    
    enum TraceHeaderKey
      {
    THK_NTR = 0,   
    THK_NSP,
    THK_NRP,
    THK_NDP,       
    THK_L,
    
    THK_NS,        
    THK_DT,        
    THK_MUTS,      
    THK_MUTE       
      };
    
    SEGY(QIODevice *segy_io_dev = 0x0);
    
    ~SEGY();
    
    
    bool nextTrace(std::vector<float> &samples, std::vector<int> &header);
    
    void reset();
    
    
    int samplesNum() const;
    
    float dtVal() const;
    
    Format format() const;
    

    static int getTrHdrVal(TraceHeaderKey key, const std::vector<int> &header);
    

    static QString formatStr(Format fmt);


    qint64 ioDeviceSize() const;

    qint64 ioDevicePos() const;

  protected:
    
    QIODevice *m_psegy_io_dev;
  
    std::vector<char> m_current_line_text_hdr;
    
    std::vector<char> m_current_line_bin_hdr;
    
    bool m_cur_line_hdrs_loaded;

    bool load_current_line_headers();
  };
};

#endif /* hds_segy.hpp */