/usr/share/tdiary/exifparser/makernote/canon.rb is in tdiary-contrib 3.2.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# exifparser/makernote/nikon.rb -
#
# Copyright (C) 2002 Ryuichi Tamura (r-tam@fsinet.or.jp)
#
# $Revision: 1.1.1.1 $
# $Date: 2002/12/16 07:59:00 $
#
require 'exifparser/tag'
require 'exifparser/utils'
module Exif
module Tag
module MakerNote
#
# 0x0000 - Unknown
#
#
# 0x0001 - Tag0x0001
#
class Tag0x0001 < Base
def processData
@formatted = []
partition_data(@count) do |part|
@formatted.push _formatData(part)
end
end
def value
numTags = @formatted[0] / 2
ret = {}
return ret if numTags < 2
#
# offset 1 : Macro mode
#
ret["Macro mode"] =
case @formatted[1]
when 1
"Macro"
when 2
"Normal"
else
"Unknown"
end
return ret if numTags < 3
#
# offset 2 : if nonzero, length of self-timer in 10ths of a second.
#
selftimer_length = @formatted[2]
return ret if numTags < 5
#
# offset 4 : Flash mode
#
ret["Flash mode"] =
case @formatted[4]
when 0
"flash not fired"
when 1
"auto"
when 2
"on"
when 3
"red-eye reduction"
when 4
"slow synchro"
when 5
"auto + redeye reduction"
when 6
"on + redeye reduction"
when 16
"external flash"
else
"unknown"
end
return ret if numTags < 6
#
# offset 5: Contiuous drive mode
#
ret["Continuous drive mode"] =
case @formatted[5]
when 0
if selftimer_length != 0
"Timer = #{selftimer_length/10.0}sec."
else
"Single"
end
when 1
"Continuous"
end
return ret if numTags < 8
#
# offset 7: Focus Mode
#
ret["Focus Mode"] =
case @formatted[7]
when 0
"One-Shot"
when 1
"AI Servo"
when 2
"AI Focus"
when 3
"MF"
when 4
"Single"
when 5
"Continuous"
when 6
"MF"
else
"Unknown"
end
return ret if numTags < 11
#
# offset 10: Image size
#
ret["Image Size"] =
case @formatted[10]
when 0
"Large"
when 1
"Medium"
when
"Small"
else
"Unknown"
end
return ret if numTags < 12
#
# offset 11: "Easy shooting" mode
#
ret["Easy shooting mode"] =
case @formatted[11]
when 0
"Full auto"
when 1
"Manual"
when 2
"Landscape"
when 3
"Fast Shutter"
when 4
"Slow Shutter"
when 5
"Night"
when 6
"B&W"
when 7
"Sepia"
when 8
"Portrait"
when 9
"Sports"
when 10
"Macro / Close-Up"
when 11
"Pan Focus"
else
"Unknown"
end
return ret if numTags < 14
#
# offset 13: Contrast
#
ret["Contrast"] =
case @formatted[13]
when 0xffff
"Low"
when 0x0000
"Normal"
when 0x0001
"High"
else
"Unknown"
end
return ret if numTags < 15
#
# offset 14: Saturation
#
ret["Saturation"] =
case @formatted[14]
when 0xffff
"Low"
when 0x0000
"Normal"
when 0x0001
"High"
else
"Unknown"
end
return ret if numTags < 16
#
# offset 15: Contrast
#
ret["Sharpness"] =
case @formatted[15]
when 0xffff
"Low"
when 0x0000
"Normal"
when 0x0001
"High"
else
"Unknown"
end
return ret if numTags < 17
#
# offset 16: ISO
#
ret["ISO"] =
case @formatted[16]
when 0
"ISOSpeedRatings"
when 15
"Auto"
when 16
50
when 17
100
when 18
200
when 19
400
else
"Unknown"
end
return ret if numTags < 18
#
# offset 17: Metering mode
#
ret['Metering mode'] =
case @formatted[17]
when 3
"Evaluative"
when 4
"Partial"
when 5
"Center-weighted"
else
"Unknown"
end
ret
end
end
#
# 0x0003 - Tag0x0003
#
class Tag0x0003 < Base
end
#
# 0x0004 - Tag0x0004
#
class Tag0x0004 < Base
def processData
@formatted = []
partition_data(@count) do |part|
@formatted.push _formatData(part)
end
end
def value
numTags = @formatted[0] / 2
ret = {}
return hash if numTags < 8
# offset 7 : white balance
ret['White balance'] =
case @formatted[7]
when 0
"Auto"
when 1
"Sunny"
when 2
"Cloudy"
when 3
"Tungsten"
when 4
"Florescent"
when 5
"Flash"
when 6
"Custom"
else
"Unknown"
end
return ret if numTags < 10
# offset 9: Sequence number (if in a continuous burst)
ret['Sequence number'] = @formatted[9]
return ret if numTags < 15
# offset 14: Auto Focus point used
ret['Auto Focus point used'] = @formatted[14]
return ret if numTags < 16
ret['Flash bias'] =
case @formatted[15]
when 0xffc0
"-2 EV"
when 0xffcc
"-1.67 EV"
when 0xffd0
"-1.50 EV"
when 0xffd4
"-1.33 EV"
when 0xffe0
"-1 EV"
when 0xffec
"-0.67 EV"
when 0xfff0
"-0.50 EV"
when 0xfff4
"-0.33 EV"
when 0x0000
"0 EV"
when 0x000c
"0.33 EV"
when 0x0010
"0.50 EV"
when 0x0014
"0.67 EV"
when 0x0020
"1 EV"
when 0x002c
"1.33 EV"
when 0x0030
"1.50 EV"
when 0x0034
"1.67 EV"
when 0x0040
"2 EV"
else
"Unknown"
end
return ret if numTags < 20
ret['Subject Distance'] = @formatted[19]
ret
end
end
#
# 0x0006 - ImageType
#
class ImageType < Base
end
#
# 0x0007 - FirmwareVersion
#
class FirmwareVersion < Base
end
#
# 0x0008 - ImageNumber
#
class ImageNumber < Base
end
#
# 0x0009 - OwnerName
#
class OwnerName < Base
end
#
# 0x000a - Unknown
#
#
# 0x000c - CameraSerialNumber
#
class CameraSerialNumber < Base
def to_s
hi = @formatted / 0x10000
low = @formatted % 0x10000
"%04X%05d"%[hi, low]
end
end
#
# 0x000d - Unknown
#
#
# 0x000f - CustomFunctions
#
class CustomFunctions < Base
def processData
@formatted = []
partition_data(@count) do |part|
@formatted.push _formatData(part)
end
end
end
end
CanonIFDTable = {
0x0000 => Unknown,
0x0001 => MakerNote::Tag0x0001,
0x0003 => MakerNote::Tag0x0003,
0x0004 => MakerNote::Tag0x0004,
0x0006 => MakerNote::ImageType,
0x0007 => MakerNote::FirmwareVersion,
0x0008 => MakerNote::ImageNumber,
0x0009 => MakerNote::OwnerName,
0x000a => Unknown,
0x000c => MakerNote::CameraSerialNumber,
0x000d => Unknown,
0x000f => MakerNote::CustomFunctions
}
end
class Canon
def initialize(fin, tiff_origin, dataPos, byteOrder_module)
@fin = fin
@tiffHeader0 = tiff_origin
@dataPos = dataPos
@byteOrder_module = byteOrder_module
self.extend @byteOrder_module
end
def scan_IFD
#
# Canon MakerNote starts from 0
#
@fin.pos = @dataPos + 0
#
# get the number of tags
#
numDirs = decode_ushort(fin_read_n(2))
#
# now scan them
#
1.upto(numDirs) {
curpos_tag = @fin.pos
tag = parseTagID(fin_read_n(2))
tagclass = Tag.find(tag.hex, Tag::CanonIFDTable)
unit, formatter = Tag::Format::Unit[decode_ushort(fin_read_n(2))]
count = decode_ulong(fin_read_n(4))
tagdata = fin_read_n(4)
obj = tagclass.new(tag, "MakerNote", count)
obj.extend formatter, @byteOrder_module
obj.pos = curpos_tag
if unit * count > 4
curpos = @fin.pos
begin
@fin.pos = @tiffHeader0 + decode_ulong(tagdata)
obj.dataPos = @fin.pos
obj.data = fin_read_n(unit*count)
ensure
@fin.pos = curpos
end
else
obj.dataPos = @fin.pos - 4
obj.data = tagdata
end
obj.processData
yield obj
}
end
private
def fin_read_n(n)
@fin.read(n)
end
end
end
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