Class: Exif::Tag::MakerNote::LensParameters

Inherits:

NikonBase

• Object
• Base
• NikonBase
• Exif::Tag::MakerNote::LensParameters

Defined in:

lib/exifparser/makernote/nikon2.rb

Overview

0x0098 - LensParamaters

Constant Summary

XLAT0 =

[0xc1,0xbf,0x6d,0x0d,0x59,0xc5,0x13,0x9d,0x83,0x61,0x6b,0x4f,0xc7,0x7f,0x3d,0x3d,
0x53,0x59,0xe3,0xc7,0xe9,0x2f,0x95,0xa7,0x95,0x1f,0xdf,0x7f,0x2b,0x29,0xc7,0x0d,
0xdf,0x07,0xef,0x71,0x89,0x3d,0x13,0x3d,0x3b,0x13,0xfb,0x0d,0x89,0xc1,0x65,0x1f,
0xb3,0x0d,0x6b,0x29,0xe3,0xfb,0xef,0xa3,0x6b,0x47,0x7f,0x95,0x35,0xa7,0x47,0x4f,
0xc7,0xf1,0x59,0x95,0x35,0x11,0x29,0x61,0xf1,0x3d,0xb3,0x2b,0x0d,0x43,0x89,0xc1,
0x9d,0x9d,0x89,0x65,0xf1,0xe9,0xdf,0xbf,0x3d,0x7f,0x53,0x97,0xe5,0xe9,0x95,0x17,
0x1d,0x3d,0x8b,0xfb,0xc7,0xe3,0x67,0xa7,0x07,0xf1,0x71,0xa7,0x53,0xb5,0x29,0x89,
0xe5,0x2b,0xa7,0x17,0x29,0xe9,0x4f,0xc5,0x65,0x6d,0x6b,0xef,0x0d,0x89,0x49,0x2f,
0xb3,0x43,0x53,0x65,0x1d,0x49,0xa3,0x13,0x89,0x59,0xef,0x6b,0xef,0x65,0x1d,0x0b,
0x59,0x13,0xe3,0x4f,0x9d,0xb3,0x29,0x43,0x2b,0x07,0x1d,0x95,0x59,0x59,0x47,0xfb,
0xe5,0xe9,0x61,0x47,0x2f,0x35,0x7f,0x17,0x7f,0xef,0x7f,0x95,0x95,0x71,0xd3,0xa3,
0x0b,0x71,0xa3,0xad,0x0b,0x3b,0xb5,0xfb,0xa3,0xbf,0x4f,0x83,0x1d,0xad,0xe9,0x2f,
0x71,0x65,0xa3,0xe5,0x07,0x35,0x3d,0x0d,0xb5,0xe9,0xe5,0x47,0x3b,0x9d,0xef,0x35,
0xa3,0xbf,0xb3,0xdf,0x53,0xd3,0x97,0x53,0x49,0x71,0x07,0x35,0x61,0x71,0x2f,0x43,
0x2f,0x11,0xdf,0x17,0x97,0xfb,0x95,0x3b,0x7f,0x6b,0xd3,0x25,0xbf,0xad,0xc7,0xc5,
0xc5,0xb5,0x8b,0xef,0x2f,0xd3,0x07,0x6b,0x25,0x49,0x95,0x25,0x49,0x6d,0x71,0xc7]

XLAT1 =

[0xa7,0xbc,0xc9,0xad,0x91,0xdf,0x85,0xe5,0xd4,0x78,0xd5,0x17,0x46,0x7c,0x29,0x4c,
0x4d,0x03,0xe9,0x25,0x68,0x11,0x86,0xb3,0xbd,0xf7,0x6f,0x61,0x22,0xa2,0x26,0x34,
0x2a,0xbe,0x1e,0x46,0x14,0x68,0x9d,0x44,0x18,0xc2,0x40,0xf4,0x7e,0x5f,0x1b,0xad,
0x0b,0x94,0xb6,0x67,0xb4,0x0b,0xe1,0xea,0x95,0x9c,0x66,0xdc,0xe7,0x5d,0x6c,0x05,
0xda,0xd5,0xdf,0x7a,0xef,0xf6,0xdb,0x1f,0x82,0x4c,0xc0,0x68,0x47,0xa1,0xbd,0xee,
0x39,0x50,0x56,0x4a,0xdd,0xdf,0xa5,0xf8,0xc6,0xda,0xca,0x90,0xca,0x01,0x42,0x9d,
0x8b,0x0c,0x73,0x43,0x75,0x05,0x94,0xde,0x24,0xb3,0x80,0x34,0xe5,0x2c,0xdc,0x9b,
0x3f,0xca,0x33,0x45,0xd0,0xdb,0x5f,0xf5,0x52,0xc3,0x21,0xda,0xe2,0x22,0x72,0x6b,
0x3e,0xd0,0x5b,0xa8,0x87,0x8c,0x06,0x5d,0x0f,0xdd,0x09,0x19,0x93,0xd0,0xb9,0xfc,
0x8b,0x0f,0x84,0x60,0x33,0x1c,0x9b,0x45,0xf1,0xf0,0xa3,0x94,0x3a,0x12,0x77,0x33,
0x4d,0x44,0x78,0x28,0x3c,0x9e,0xfd,0x65,0x57,0x16,0x94,0x6b,0xfb,0x59,0xd0,0xc8,
0x22,0x36,0xdb,0xd2,0x63,0x98,0x43,0xa1,0x04,0x87,0x86,0xf7,0xa6,0x26,0xbb,0xd6,
0x59,0x4d,0xbf,0x6a,0x2e,0xaa,0x2b,0xef,0xe6,0x78,0xb6,0x4e,0xe0,0x2f,0xdc,0x7c,
0xbe,0x57,0x19,0x32,0x7e,0x2a,0xd0,0xb8,0xba,0x29,0x00,0x3c,0x52,0x7d,0xa8,0x49,
0x3b,0x2d,0xeb,0x25,0x49,0xfa,0xa3,0xaa,0x39,0xa7,0xc5,0xa7,0x50,0x11,0x36,0xfb,
0xc6,0x67,0x4a,0xf5,0xa5,0x12,0x65,0x7e,0xb0,0xdf,0xaf,0x4e,0xb3,0x61,0x7f,0x2f]

Instance Attribute Summary

Attributes inherited from Base

#IFD, #count, #data, #dataPos, #pos, #tagID

Instance Method Summary

• #_format0(data) ⇒ Object
• #decrypt_data(data, serial, count) ⇒ Object
• #to_hex ⇒ Object
• #to_s ⇒ Object

Methods inherited from Base

#formatExposureTime, #formatFNumber, #formatFocalLength, #formatLatLon, #initialize, #inspect, #name, #processData, #value

Constructor Details

This class inherits a constructor from Exif::Tag::Base

Instance Method Details

#_format0(data) ⇒ Object

# File 'lib/exifparser/makernote/nikon2.rb', line 333

def _format0(data)
  data.unpack("C*").collect{|e| e.to_i}
end

#decrypt_data(data, serial, count) ⇒ Object

# File 'lib/exifparser/makernote/nikon2.rb', line 407

def decrypt_data(data, serial, count)
  serialno = serial.to_i
  if serialno == 0
    if serial[0,3] == "D50"
      serialno = 0x22
    else
      serialno = 0x60
    end
  end

  key = 0
  4.times do |i|
    key ^= ((count >> (i*8)) & 0xff)
  end

  ci = XLAT0[serialno & 0xff]
  cj = XLAT1[key]
  ck = 0x60;
  pdata = []

  data.each do |dat|
    cj += ((ci * ck) & 0xff)
    cj &= 0xff
    ck += 1
    pdata.push(dat ^= cj)
  end

  return pdata
end

#to_hex ⇒ Object

# File 'lib/exifparser/makernote/nikon2.rb', line 337

def to_hex
  str = ""
  @formatted.each do |dat|
    str += sprintf("%02x ", dat)
  end
  return str
end

#to_s ⇒ Object

# File 'lib/exifparser/makernote/nikon2.rb', line 379

def to_s
  data = @formatted
  lens_data = ""
  version = data[0, 4].pack('C*')
  case version
  when "0100"
    lens_data = data[6, 7]

  when "0101"
    lens_data = data[11, 7]

  when "0201", "0202", "0203"
    decryptted = decrypt_data(data[4..(data.length - 1)], @@nikon_serial_no, @@release_count)
    lens_data = decryptted[7, 7]
    
  when "0204"
    decryptted = decrypt_data(data[4..(data.length - 1)], @@nikon_serial_no, @@release_count)
    lens_data = decryptted[8, 7]
  end

  return "" if lens_data.length == 0

  self.extend NikonFmount
  ret = Tag::NikonFmount::LensName[lens_data]
  return ret != nil ? ret : ""

end