--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/degal/lib/exif_data.py Sun Jun 14 16:10:30 2009 +0300
@@ -0,0 +1,1304 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+"""
+ EXIF file format data, including tag names, types, etc.
+
+ Most of this was copied with modifications from EXIFpy:
+ # Library to extract EXIF information from digital camera image files
+ # http://sourceforge.net/projects/exif-py/
+ #
+ # VERSION 1.1.0
+ #
+ # Copyright (c) 2002-2007 Gene Cash All rights reserved
+ # Copyright (c) 2007-2008 Ianaré Sévi All rights reserved
+ #
+ # Redistribution and use in source and binary forms, with or without
+ # modification, are permitted provided that the following conditions
+ # are met:
+ #
+ # 1. Redistributions of source code must retain the above copyright
+ # notice, this list of conditions and the following disclaimer.
+ #
+ # 2. Redistributions in binary form must reproduce the above
+ # copyright notice, this list of conditions and the following
+ # disclaimer in the documentation and/or other materials provided
+ # with the distribution.
+ #
+ # 3. Neither the name of the authors nor the names of its contributors
+ # may be used to endorse or promote products derived from this
+ # software without specific prior written permission.
+ #
+ # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+
+import decimal, itertools
+
+def filter_ascii (values) :
+ """
+ Default post-filter for ASCII values.
+
+ This takes a single item of string data, splits it up into strings by ASCII-NUL.
+
+ These sub-strings are then decoded into unicode as ASCII, and stripped.
+ """
+
+ return [string.decode('ascii', 'replace').rstrip() for string in values[0].split('\x00') if string]
+
+def build_ratio (num, denom) :
+ """
+ Builds a Decimal ratio out of the given numerator and denominator
+ """
+
+ # XXX: this may be slow
+ return decimal.Decimal(num) / decimal.Decimal(denom)
+
+def filter_ratio (values) :
+ """
+ Default post-filter for Ratio values.
+
+ This takes the pairs of numerator/denominator values and builds Decimals out of them
+ """
+
+ return [build_ratio(values[i], values[i + 1]) for i in xrange(0, len(values), 2)]
+
+
+# IFD Tag type information, indexed by code
+# { type_code: (type_fmt, name, filter_func) }
+#
+# type_fmt's that are one char will be prefixed with the count for use with struct.unpack, those with more chars will
+# be repeated as many times for use with struct.unpack.
+FIELD_TYPES = {
+# 0x0000: (None, 'Proprietary' ), # ??? no such type
+ 0x0001: ('B', 'Byte', None ),
+ 0x0002: ('s', 'ASCII', filter_ascii ),
+ 0x0003: ('H', 'Short', None ),
+ 0x0004: ('L', 'Long', None ),
+ 0x0005: ('LL', 'Ratio', filter_ratio ),
+ 0x0006: ('b', 'Signed Byte', None ),
+ 0x0007: ('s', 'Undefined', None ),
+ 0x0008: ('h', 'Signed Short', None ),
+ 0x0009: ('l', 'Signed Long', None ),
+ 0x000A: ('ll', 'Signed Ratio', filter_ratio ),
+}
+
+# magic value to indicate sub-IFDs
+SUB_IFD_MAGIC = object()
+
+
+class Tag (object) :
+ """
+ Represents an Exif Tag
+ """
+
+ def __init__ (self, name) :
+ """
+ Build Exif tag with given name, and optional external values-filter function.
+ """
+
+ self.name = name
+
+ def map_values (self, values) :
+ """
+ Map the given tag value to a printable string using the given value spec.
+ """
+
+ # default value-mapping
+ return ", ".join(str(value) for value in values)
+
+class TagDict (Tag) :
+ """
+ A tag with a dict mapping values to names
+ """
+
+ def __init__ (self, name, values_dict) :
+ super(TagDict, self).__init__(name)
+
+ self.values_dict = values_dict
+
+ def map_values (self, values) :
+ """
+ Map the values through our dict, defaulting to the repr.
+ """
+
+ return ", ".join(self.values_dict.get(value, repr(value)) for value in values)
+
+class TagFunc (Tag) :
+ """
+ A tag with a simple function mapping values to names
+ """
+
+ def __init__ (self, name, values_func) :
+ super(TagFunc, self).__init__(name)
+
+ self.values_func = values_func
+
+ def map_values (self, values) :
+ """
+ Map the values through our func
+ """
+
+ return self.values_func(values)
+
+class IFDTag (Tag) :
+ """
+ A tag that references another IFD
+ """
+
+ def __init__ (self, name, ifd_tags=None) :
+ """
+ A tag that points to another IFD block. `ifd_tags`, if given, lists the tags for that block, otherwise,
+ the same tags as for the current block are used.
+ """
+
+ super(IFDTag, self).__init__(name)
+
+ self.ifd_tags = ifd_tags
+
+USER_COMMENT_CHARSETS = {
+ 'ASCII': ('ascii', 'replace' ),
+ 'JIS': ('jis', 'error' ),
+
+ # XXX: WTF? What kind of charset is 'Unicode' supposed to be?
+ # UTF-16? Little-endian? Big-endian?
+ # Confusing reigns: http://www.cpanforum.com/threads/7329
+ 'UNICODE': ('utf16', 'error' ),
+}
+
+
+def decode_UserComment (values) :
+ """
+ A UserComment field starts with an eight-byte encoding designator.
+ """
+
+ # single binary string
+ value, = values
+
+ # split up
+ charset, comment_raw = value[:8], value[8:]
+
+ # strip NILs
+ charset = charset.rstrip('\x00')
+
+ # map
+ encoding, replace = USER_COMMENT_CHARSETS.get(charset, ('ascii', 'replace'))
+
+ # decode
+ return [comment_raw.decode(encoding, replace)]
+
+# Mappings of Exif tag codes to name and decoding information.
+# { tag : (name, value_dict/value_func/None/SUB_IFD_MAGIC) }
+#
+# name is the official Exif tag name
+# value_dict is a { value: value_name } mapping for human-readable values
+# value_func is a `(values) -> values` mapping function which *overrides* the tag's type_func.
+# XXX: or does it?
+# SUB_IFD_MAGIC signifies that this IFD points to
+# otherwise, the value is left as-is.
+# interoperability tags
+INTR_TAGS = {
+ 0x0001: Tag('InteroperabilityIndex'),
+ 0x0002: Tag('InteroperabilityVersion'),
+ 0x1000: Tag('RelatedImageFileFormat'),
+ 0x1001: Tag('RelatedImageWidth'),
+ 0x1002: Tag('RelatedImageLength'),
+ }
+
+# GPS tags (not used yet, haven't seen camera with GPS)
+GPS_TAGS = {
+ 0x0000: Tag('GPSVersionID'),
+ 0x0001: Tag('GPSLatitudeRef'),
+ 0x0002: Tag('GPSLatitude'),
+ 0x0003: Tag('GPSLongitudeRef'),
+ 0x0004: Tag('GPSLongitude'),
+ 0x0005: Tag('GPSAltitudeRef'),
+ 0x0006: Tag('GPSAltitude'),
+ 0x0007: Tag('GPSTimeStamp'),
+ 0x0008: Tag('GPSSatellites'),
+ 0x0009: Tag('GPSStatus'),
+ 0x000A: Tag('GPSMeasureMode'),
+ 0x000B: Tag('GPSDOP'),
+ 0x000C: Tag('GPSSpeedRef'),
+ 0x000D: Tag('GPSSpeed'),
+ 0x000E: Tag('GPSTrackRef'),
+ 0x000F: Tag('GPSTrack'),
+ 0x0010: Tag('GPSImgDirectionRef'),
+ 0x0011: Tag('GPSImgDirection'),
+ 0x0012: Tag('GPSMapDatum'),
+ 0x0013: Tag('GPSDestLatitudeRef'),
+ 0x0014: Tag('GPSDestLatitude'),
+ 0x0015: Tag('GPSDestLongitudeRef'),
+ 0x0016: Tag('GPSDestLongitude'),
+ 0x0017: Tag('GPSDestBearingRef'),
+ 0x0018: Tag('GPSDestBearing'),
+ 0x0019: Tag('GPSDestDistanceRef'),
+ 0x001A: Tag('GPSDestDistance'),
+ 0x001D: Tag('GPSDate'),
+ }
+
+
+EXIF_TAGS = {
+ 0x0100: Tag('ImageWidth'),
+ 0x0101: Tag('ImageLength'),
+ 0x0102: Tag('BitsPerSample'),
+ 0x0103: TagDict('Compression',
+ {1: 'Uncompressed',
+ 2: 'CCITT 1D',
+ 3: 'T4/Group 3 Fax',
+ 4: 'T6/Group 4 Fax',
+ 5: 'LZW',
+ 6: 'JPEG (old-style)',
+ 7: 'JPEG',
+ 8: 'Adobe Deflate',
+ 9: 'JBIG B&W',
+ 10: 'JBIG Color',
+ 32766: 'Next',
+ 32769: 'Epson ERF Compressed',
+ 32771: 'CCIRLEW',
+ 32773: 'PackBits',
+ 32809: 'Thunderscan',
+ 32895: 'IT8CTPAD',
+ 32896: 'IT8LW',
+ 32897: 'IT8MP',
+ 32898: 'IT8BL',
+ 32908: 'PixarFilm',
+ 32909: 'PixarLog',
+ 32946: 'Deflate',
+ 32947: 'DCS',
+ 34661: 'JBIG',
+ 34676: 'SGILog',
+ 34677: 'SGILog24',
+ 34712: 'JPEG 2000',
+ 34713: 'Nikon NEF Compressed',
+ 65000: 'Kodak DCR Compressed',
+ 65535: 'Pentax PEF Compressed'}),
+ 0x0106: Tag('PhotometricInterpretation'),
+ 0x0107: Tag('Thresholding'),
+ 0x010A: Tag('FillOrder'),
+ 0x010D: Tag('DocumentName'),
+ 0x010E: Tag('ImageDescription'),
+ 0x010F: Tag('Make'),
+ 0x0110: Tag('Model'),
+ 0x0111: Tag('StripOffsets'),
+ 0x0112: TagDict('Orientation',
+ {1: 'Horizontal (normal)',
+ 2: 'Mirrored horizontal',
+ 3: 'Rotated 180',
+ 4: 'Mirrored vertical',
+ 5: 'Mirrored horizontal then rotated 90 CCW',
+ 6: 'Rotated 90 CW',
+ 7: 'Mirrored horizontal then rotated 90 CW',
+ 8: 'Rotated 90 CCW'}),
+ 0x0115: Tag('SamplesPerPixel'),
+ 0x0116: Tag('RowsPerStrip'),
+ 0x0117: Tag('StripByteCounts'),
+ 0x011A: Tag('XResolution'),
+ 0x011B: Tag('YResolution'),
+ 0x011C: Tag('PlanarConfiguration'),
+ 0x011D: Tag('PageName'),
+ 0x0128: TagDict('ResolutionUnit',
+ {1: 'Not Absolute',
+ 2: 'Pixels/Inch',
+ 3: 'Pixels/Centimeter'}),
+ 0x012D: Tag('TransferFunction'),
+ 0x0131: Tag('Software'),
+ 0x0132: Tag('DateTime'),
+ 0x013B: Tag('Artist'),
+ 0x013E: Tag('WhitePoint'),
+ 0x013F: Tag('PrimaryChromaticities'),
+ 0x0156: Tag('TransferRange'),
+ 0x0200: Tag('JPEGProc'),
+ 0x0201: Tag('JPEGInterchangeFormat'),
+ 0x0202: Tag('JPEGInterchangeFormatLength'),
+ 0x0211: Tag('YCbCrCoefficients'),
+ 0x0212: Tag('YCbCrSubSampling'),
+ 0x0213: TagDict('YCbCrPositioning',
+ {1: 'Centered',
+ 2: 'Co-sited'}),
+ 0x0214: Tag('ReferenceBlackWhite'),
+
+ 0x4746: Tag('Rating'),
+
+ 0x828D: Tag('CFARepeatPatternDim'),
+ 0x828E: Tag('CFAPattern'),
+ 0x828F: Tag('BatteryLevel'),
+ 0x8298: Tag('Copyright'),
+ 0x829A: Tag('ExposureTime'),
+ 0x829D: Tag('FNumber'),
+ 0x83BB: Tag('IPTC/NAA'),
+ 0x8769: IFDTag('ExifOffset', None),
+ 0x8773: Tag('InterColorProfile'),
+ 0x8822: TagDict('ExposureProgram',
+ {0: 'Unidentified',
+ 1: 'Manual',
+ 2: 'Program Normal',
+ 3: 'Aperture Priority',
+ 4: 'Shutter Priority',
+ 5: 'Program Creative',
+ 6: 'Program Action',
+ 7: 'Portrait Mode',
+ 8: 'Landscape Mode'}),
+ 0x8824: Tag('SpectralSensitivity'),
+ 0x8825: IFDTag('GPSInfo', GPS_TAGS),
+ 0x8827: Tag('ISOSpeedRatings'),
+ 0x8828: Tag('OECF'),
+ 0x9000: Tag('ExifVersion'),
+ 0x9003: Tag('DateTimeOriginal'),
+ 0x9004: Tag('DateTimeDigitized'),
+ 0x9101: TagDict('ComponentsConfiguration',
+ {0: '',
+ 1: 'Y',
+ 2: 'Cb',
+ 3: 'Cr',
+ 4: 'Red',
+ 5: 'Green',
+ 6: 'Blue'}),
+ 0x9102: Tag('CompressedBitsPerPixel'),
+ 0x9201: Tag('ShutterSpeedValue'),
+ 0x9202: Tag('ApertureValue'),
+ 0x9203: Tag('BrightnessValue'),
+ 0x9204: Tag('ExposureBiasValue'),
+ 0x9205: Tag('MaxApertureValue'),
+ 0x9206: Tag('SubjectDistance'),
+ 0x9207: TagDict('MeteringMode',
+ {0: 'Unidentified',
+ 1: 'Average',
+ 2: 'CenterWeightedAverage',
+ 3: 'Spot',
+ 4: 'MultiSpot',
+ 5: 'Pattern'}),
+ 0x9208: TagDict('LightSource',
+ {0: 'Unknown',
+ 1: 'Daylight',
+ 2: 'Fluorescent',
+ 3: 'Tungsten',
+ 9: 'Fine Weather',
+ 10: 'Flash',
+ 11: 'Shade',
+ 12: 'Daylight Fluorescent',
+ 13: 'Day White Fluorescent',
+ 14: 'Cool White Fluorescent',
+ 15: 'White Fluorescent',
+ 17: 'Standard Light A',
+ 18: 'Standard Light B',
+ 19: 'Standard Light C',
+ 20: 'D55',
+ 21: 'D65',
+ 22: 'D75',
+ 255: 'Other'}),
+ 0x9209: TagDict('Flash',
+ {0: 'No',
+ 1: 'Fired',
+ 5: 'Fired (?)', # no return sensed
+ 7: 'Fired (!)', # return sensed
+ 9: 'Fill Fired',
+ 13: 'Fill Fired (?)',
+ 15: 'Fill Fired (!)',
+ 16: 'Off',
+ 24: 'Auto Off',
+ 25: 'Auto Fired',
+ 29: 'Auto Fired (?)',
+ 31: 'Auto Fired (!)',
+ 32: 'Not Available'}),
+ 0x920A: Tag('FocalLength'),
+ 0x9214: Tag('SubjectArea'),
+ 0x927C: Tag('MakerNote'),
+ 0x9286: TagFunc('UserComment', decode_UserComment),
+ 0x9290: Tag('SubSecTime'),
+ 0x9291: Tag('SubSecTimeOriginal'),
+ 0x9292: Tag('SubSecTimeDigitized'),
+
+ # used by Windows Explorer
+ 0x9C9B: Tag('XPTitle'),
+ 0x9C9C: Tag('XPComment'),
+ 0x9C9D: Tag('XPAuthor'), #(ignored by Windows Explorer if Artist exists)
+ 0x9C9E: Tag('XPKeywords'),
+ 0x9C9F: Tag('XPSubject'),
+
+ 0xA000: Tag('FlashPixVersion'),
+ 0xA001: TagDict('ColorSpace',
+ {1: 'sRGB',
+ 2: 'Adobe RGB',
+ 65535: 'Uncalibrated'}),
+ 0xA002: Tag('ExifImageWidth'),
+ 0xA003: Tag('ExifImageLength'),
+ 0xA005: IFDTag('InteroperabilityOffset', INTR_TAGS),
+ 0xA20B: Tag('FlashEnergy'), # 0x920B in TIFF/EP
+ 0xA20C: Tag('SpatialFrequencyResponse'), # 0x920C
+ 0xA20E: Tag('FocalPlaneXResolution'), # 0x920E
+ 0xA20F: Tag('FocalPlaneYResolution'), # 0x920F
+ 0xA210: Tag('FocalPlaneResolutionUnit'), # 0x9210
+ 0xA214: Tag('SubjectLocation'), # 0x9214
+ 0xA215: Tag('ExposureIndex'), # 0x9215
+ 0xA217: TagDict('SensingMethod', # 0x9217
+ {1: 'Not defined',
+ 2: 'One-chip color area',
+ 3: 'Two-chip color area',
+ 4: 'Three-chip color area',
+ 5: 'Color sequential area',
+ 7: 'Trilinear',
+ 8: 'Color sequential linear'}),
+ 0xA300: TagDict('FileSource',
+ {1: 'Film Scanner',
+ 2: 'Reflection Print Scanner',
+ 3: 'Digital Camera'}),
+ 0xA301: TagDict('SceneType',
+ {1: 'Directly Photographed'}),
+ 0xA302: Tag('CVAPattern'),
+ 0xA401: TagDict('CustomRendered',
+ {0: 'Normal',
+ 1: 'Custom'}),
+ 0xA402: TagDict('ExposureMode',
+ {0: 'Auto Exposure',
+ 1: 'Manual Exposure',
+ 2: 'Auto Bracket'}),
+ 0xA403: TagDict('WhiteBalance',
+ {0: 'Auto',
+ 1: 'Manual'}),
+ 0xA404: Tag('DigitalZoomRatio'),
+ 0xA405: ('FocalLengthIn35mmFilm', None),
+ 0xA406: TagDict('SceneCaptureType',
+ {0: 'Standard',
+ 1: 'Landscape',
+ 2: 'Portrait',
+ 3: 'Night)'}),
+ 0xA407: TagDict('GainControl',
+ {0: 'None',
+ 1: 'Low gain up',
+ 2: 'High gain up',
+ 3: 'Low gain down',
+ 4: 'High gain down'}),
+ 0xA408: TagDict('Contrast',
+ {0: 'Normal',
+ 1: 'Soft',
+ 2: 'Hard'}),
+ 0xA409: TagDict('Saturation',
+ {0: 'Normal',
+ 1: 'Soft',
+ 2: 'Hard'}),
+ 0xA40A: TagDict('Sharpness',
+ {0: 'Normal',
+ 1: 'Soft',
+ 2: 'Hard'}),
+ 0xA40B: Tag('DeviceSettingDescription'),
+ 0xA40C: Tag('SubjectDistanceRange'),
+ 0xA500: Tag('Gamma'),
+ 0xC4A5: Tag('PrintIM'),
+ 0xEA1C: ('Padding', None),
+ }
+
+# http://tomtia.plala.jp/DigitalCamera/MakerNote/index.asp
+def nikon_ev_bias (seq) :
+ """
+ # First digit seems to be in steps of 1/6 EV.
+ # Does the third value mean the step size? It is usually 6,
+ # but it is 12 for the ExposureDifference.
+ """
+
+ # check for an error condition that could cause a crash.
+ # this only happens if something has gone really wrong in
+ # reading the Nikon MakerNote.
+ if len(seq) < 4 :
+ return ""
+
+ if seq == [252, 1, 6, 0]:
+ return "-2/3 EV"
+
+ if seq == [253, 1, 6, 0]:
+ return "-1/2 EV"
+
+ if seq == [254, 1, 6, 0]:
+ return "-1/3 EV"
+
+ if seq == [0, 1, 6, 0]:
+ return "0 EV"
+
+ if seq == [2, 1, 6, 0]:
+ return "+1/3 EV"
+
+ if seq == [3, 1, 6, 0]:
+ return "+1/2 EV"
+
+ if seq == [4, 1, 6, 0]:
+ return "+2/3 EV"
+
+ # handle combinations not in the table.
+ a = seq[0]
+
+ # causes headaches for the +/- logic, so special case it.
+ if a == 0:
+ return "0 EV"
+
+ if a > 127:
+ a = 256 - a
+ ret_str = "-"
+ else:
+ ret_str = "+"
+
+ b = seq[2] # assume third value means the step size
+
+ whole = a / b
+
+ a = a % b
+
+ if whole != 0 :
+ ret_str = ret_str + str(whole) + " "
+
+ if a == 0 :
+ ret_str = ret_str + "EV"
+ else :
+ r = Ratio(a, b)
+ ret_str = ret_str + r.__repr__() + " EV"
+
+ return ret_str
+
+# Nikon E99x MakerNote Tags
+MAKERNOTE_NIKON_NEWER_TAGS={
+ 0x0001: Tag('MakernoteVersion'), # Sometimes binary
+ 0x0002: Tag('ISOSetting'),
+ 0x0003: Tag('ColorMode'),
+ 0x0004: Tag('Quality'),
+ 0x0005: Tag('Whitebalance'),
+ 0x0006: Tag('ImageSharpening'),
+ 0x0007: Tag('FocusMode'),
+ 0x0008: Tag('FlashSetting'),
+ 0x0009: Tag('AutoFlashMode'),
+ 0x000B: Tag('WhiteBalanceBias'),
+ 0x000C: Tag('WhiteBalanceRBCoeff'),
+ 0x000D: TagFunc('ProgramShift', nikon_ev_bias),
+ # Nearly the same as the other EV vals, but step size is 1/12 EV (?)
+ 0x000E: TagFunc('ExposureDifference', nikon_ev_bias),
+ 0x000F: Tag('ISOSelection'),
+ 0x0011: Tag('NikonPreview'),
+ 0x0012: TagFunc('FlashCompensation', nikon_ev_bias),
+ 0x0013: Tag('ISOSpeedRequested'),
+ 0x0016: Tag('PhotoCornerCoordinates'),
+ # 0x0017: Unknown, but most likely an EV value
+ 0x0018: TagFunc('FlashBracketCompensationApplied', nikon_ev_bias),
+ 0x0019: Tag('AEBracketCompensationApplied'),
+ 0x001A: Tag('ImageProcessing'),
+ 0x001B: Tag('CropHiSpeed'),
+ 0x001D: Tag('SerialNumber'), # Conflict with 0x00A0 ?
+ 0x001E: Tag('ColorSpace'),
+ 0x001F: Tag('VRInfo'),
+ 0x0020: Tag('ImageAuthentication'),
+ 0x0022: Tag('ActiveDLighting'),
+ 0x0023: Tag('PictureControl'),
+ 0x0024: Tag('WorldTime'),
+ 0x0025: Tag('ISOInfo'),
+ 0x0080: Tag('ImageAdjustment'),
+ 0x0081: Tag('ToneCompensation'),
+ 0x0082: Tag('AuxiliaryLens'),
+ 0x0083: Tag('LensType'),
+ 0x0084: Tag('LensMinMaxFocalMaxAperture'),
+ 0x0085: Tag('ManualFocusDistance'),
+ 0x0086: Tag('DigitalZoomFactor'),
+ 0x0087: TagDict('FlashMode',
+ {0x00: 'Did Not Fire',
+ 0x01: 'Fired, Manual',
+ 0x07: 'Fired, External',
+ 0x08: 'Fired, Commander Mode ',
+ 0x09: 'Fired, TTL Mode'}),
+ 0x0088: TagDict('AFFocusPosition',
+ {0x0000: 'Center',
+ 0x0100: 'Top',
+ 0x0200: 'Bottom',
+ 0x0300: 'Left',
+ 0x0400: 'Right'}),
+ 0x0089: TagDict('BracketingMode',
+ {0x00: 'Single frame, no bracketing',
+ 0x01: 'Continuous, no bracketing',
+ 0x02: 'Timer, no bracketing',
+ 0x10: 'Single frame, exposure bracketing',
+ 0x11: 'Continuous, exposure bracketing',
+ 0x12: 'Timer, exposure bracketing',
+ 0x40: 'Single frame, white balance bracketing',
+ 0x41: 'Continuous, white balance bracketing',
+ 0x42: 'Timer, white balance bracketing'}),
+ 0x008A: Tag('AutoBracketRelease'),
+ 0x008B: Tag('LensFStops'),
+ 0x008C: ('NEFCurve1', None), # ExifTool calls this 'ContrastCurve'
+ 0x008D: Tag('ColorMode'),
+ 0x008F: Tag('SceneMode'),
+ 0x0090: Tag('LightingType'),
+ 0x0091: Tag('ShotInfo'), # First 4 bytes are a version number in ASCII
+ 0x0092: Tag('HueAdjustment'),
+ # ExifTool calls this 'NEFCompression', should be 1-4
+ 0x0093: Tag('Compression'),
+ 0x0094: TagDict('Saturation',
+ {-3: 'B&W',
+ -2: '-2',
+ -1: '-1',
+ 0: '0',
+ 1: '1',
+ 2: '2'}),
+ 0x0095: Tag('NoiseReduction'),
+ 0x0096: ('NEFCurve2', None), # ExifTool calls this 'LinearizationTable'
+ 0x0097: Tag('ColorBalance'), # First 4 bytes are a version number in ASCII
+ 0x0098: Tag('LensData'), # First 4 bytes are a version number in ASCII
+ 0x0099: Tag('RawImageCenter'),
+ 0x009A: Tag('SensorPixelSize'),
+ 0x009C: Tag('Scene Assist'),
+ 0x009E: Tag('RetouchHistory'),
+ 0x00A0: Tag('SerialNumber'),
+ 0x00A2: Tag('ImageDataSize'),
+ # 00A3: unknown - a single byte 0
+ # 00A4: In NEF, looks like a 4 byte ASCII version number ('0200')
+ 0x00A5: Tag('ImageCount'),
+ 0x00A6: Tag('DeletedImageCount'),
+ 0x00A7: Tag('TotalShutterReleases'),
+ # First 4 bytes are a version number in ASCII, with version specific
+ # info to follow. Its hard to treat it as a string due to embedded nulls.
+ 0x00A8: Tag('FlashInfo'),
+ 0x00A9: Tag('ImageOptimization'),
+ 0x00AA: Tag('Saturation'),
+ 0x00AB: Tag('DigitalVariProgram'),
+ 0x00AC: Tag('ImageStabilization'),
+ 0x00AD: Tag('Responsive AF'), # 'AFResponse'
+ 0x00B0: Tag('MultiExposure'),
+ 0x00B1: Tag('HighISONoiseReduction'),
+ 0x00B7: Tag('AFInfo'),
+ 0x00B8: Tag('FileInfo'),
+ # 00B9: unknown
+ 0x0100: Tag('DigitalICE'),
+ 0x0103: TagDict('PreviewCompression',
+ {1: 'Uncompressed',
+ 2: 'CCITT 1D',
+ 3: 'T4/Group 3 Fax',
+ 4: 'T6/Group 4 Fax',
+ 5: 'LZW',
+ 6: 'JPEG (old-style)',
+ 7: 'JPEG',
+ 8: 'Adobe Deflate',
+ 9: 'JBIG B&W',
+ 10: 'JBIG Color',
+ 32766: 'Next',
+ 32769: 'Epson ERF Compressed',
+ 32771: 'CCIRLEW',
+ 32773: 'PackBits',
+ 32809: 'Thunderscan',
+ 32895: 'IT8CTPAD',
+ 32896: 'IT8LW',
+ 32897: 'IT8MP',
+ 32898: 'IT8BL',
+ 32908: 'PixarFilm',
+ 32909: 'PixarLog',
+ 32946: 'Deflate',
+ 32947: 'DCS',
+ 34661: 'JBIG',
+ 34676: 'SGILog',
+ 34677: 'SGILog24',
+ 34712: 'JPEG 2000',
+ 34713: 'Nikon NEF Compressed',
+ 65000: 'Kodak DCR Compressed',
+ 65535: 'Pentax PEF Compressed',}),
+ 0x0201: Tag('PreviewImageStart'),
+ 0x0202: Tag('PreviewImageLength'),
+ 0x0213: TagDict('PreviewYCbCrPositioning',
+ {1: 'Centered',
+ 2: 'Co-sited'}),
+ 0x0010: Tag('DataDump'),
+ }
+
+MAKERNOTE_NIKON_OLDER_TAGS = {
+ 0x0003: TagDict('Quality',
+ {1: 'VGA Basic',
+ 2: 'VGA Normal',
+ 3: 'VGA Fine',
+ 4: 'SXGA Basic',
+ 5: 'SXGA Normal',
+ 6: 'SXGA Fine'}),
+ 0x0004: TagDict('ColorMode',
+ {1: 'Color',
+ 2: 'Monochrome'}),
+ 0x0005: TagDict('ImageAdjustment',
+ {0: 'Normal',
+ 1: 'Bright+',
+ 2: 'Bright-',
+ 3: 'Contrast+',
+ 4: 'Contrast-'}),
+ 0x0006: TagDict('CCDSpeed',
+ {0: 'ISO 80',
+ 2: 'ISO 160',
+ 4: 'ISO 320',
+ 5: 'ISO 100'}),
+ 0x0007: TagDict('WhiteBalance',
+ {0: 'Auto',
+ 1: 'Preset',
+ 2: 'Daylight',
+ 3: 'Incandescent',
+ 4: 'Fluorescent',
+ 5: 'Cloudy',
+ 6: 'Speed Light'}),
+ }
+
+def olympus_special_mode (values) :
+ """
+ Decode Olympus SpecialMode tag in MakerNote
+ """
+
+ a = {
+ 0: 'Normal',
+ 1: 'Unknown',
+ 2: 'Fast',
+ 3: 'Panorama'
+ }
+
+ b = {
+ 0: 'Non-panoramic',
+ 1: 'Left to right',
+ 2: 'Right to left',
+ 3: 'Bottom to top',
+ 4: 'Top to bottom'
+ }
+
+ if v[0] not in a or v[2] not in b:
+ return values
+
+ return '%s - sequence %d - %s' % (a[v[0]], v[1], b[v[2]])
+
+MAKERNOTE_OLYMPUS_TAGS={
+ # ah HAH! those sneeeeeaky bastids! this is how they get past the fact
+ # that a JPEG thumbnail is not allowed in an uncompressed TIFF file
+ 0x0100: Tag('JPEGThumbnail'),
+ 0x0200: TagFunc('SpecialMode', olympus_special_mode),
+ 0x0201: TagDict('JPEGQual',
+ {1: 'SQ',
+ 2: 'HQ',
+ 3: 'SHQ'}),
+ 0x0202: TagDict('Macro',
+ {0: 'Normal',
+ 1: 'Macro',
+ 2: 'SuperMacro'}),
+ 0x0203: TagDict('BWMode',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x0204: Tag('DigitalZoom'),
+ 0x0205: Tag('FocalPlaneDiagonal'),
+ 0x0206: Tag('LensDistortionParams'),
+ 0x0207: Tag('SoftwareRelease'),
+ 0x0208: Tag('PictureInfo'),
+ 0x0209: Tag('CameraID'), # print as string
+ 0x0F00: Tag('DataDump'),
+ 0x0300: Tag('PreCaptureFrames'),
+ 0x0404: Tag('SerialNumber'),
+ 0x1000: Tag('ShutterSpeedValue'),
+ 0x1001: Tag('ISOValue'),
+ 0x1002: Tag('ApertureValue'),
+ 0x1003: Tag('BrightnessValue'),
+ 0x1004: Tag('FlashMode'),
+ 0x1004: TagDict('FlashMode',
+ {2: 'On',
+ 3: 'Off'}),
+ 0x1005: TagDict('FlashDevice',
+ {0: 'None',
+ 1: 'Internal',
+ 4: 'External',
+ 5: 'Internal + External'}),
+ 0x1006: Tag('ExposureCompensation'),
+ 0x1007: Tag('SensorTemperature'),
+ 0x1008: Tag('LensTemperature'),
+ 0x100b: TagDict('FocusMode',
+ {0: 'Auto',
+ 1: 'Manual'}),
+ 0x1017: Tag('RedBalance'),
+ 0x1018: Tag('BlueBalance'),
+ 0x101a: Tag('SerialNumber'),
+ 0x1023: Tag('FlashExposureComp'),
+ 0x1026: TagDict('ExternalFlashBounce',
+ {0: 'No',
+ 1: 'Yes'}),
+ 0x1027: Tag('ExternalFlashZoom'),
+ 0x1028: Tag('ExternalFlashMode'),
+ 0x1029: ('Contrast int16u',
+ {0: 'High',
+ 1: 'Normal',
+ 2: 'Low'}),
+ 0x102a: Tag('SharpnessFactor'),
+ 0x102b: Tag('ColorControl'),
+ 0x102c: Tag('ValidBits'),
+ 0x102d: Tag('CoringFilter'),
+ 0x102e: Tag('OlympusImageWidth'),
+ 0x102f: Tag('OlympusImageHeight'),
+ 0x1034: Tag('CompressionRatio'),
+ 0x1035: TagDict('PreviewImageValid',
+ {0: 'No',
+ 1: 'Yes'}),
+ 0x1036: Tag('PreviewImageStart'),
+ 0x1037: Tag('PreviewImageLength'),
+ 0x1039: TagDict('CCDScanMode',
+ {0: 'Interlaced',
+ 1: 'Progressive'}),
+ 0x103a: TagDict('NoiseReduction',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x103b: Tag('InfinityLensStep'),
+ 0x103c: Tag('NearLensStep'),
+
+ # TODO - these need extra definitions
+ # http://search.cpan.org/src/EXIFTOOL/Image-ExifTool-6.90/html/TagNames/Olympus.html
+ 0x2010: Tag('Equipment'),
+ 0x2020: Tag('CameraSettings'),
+ 0x2030: Tag('RawDevelopment'),
+ 0x2040: Tag('ImageProcessing'),
+ 0x2050: Tag('FocusInfo'),
+ 0x3000: Tag('RawInfo '),
+ }
+
+# 0x2020 CameraSettings
+MAKERNOTE_OLYMPUS_TAG_0x2020={
+ 0x0100: TagDict('PreviewImageValid',
+ {0: 'No',
+ 1: 'Yes'}),
+ 0x0101: Tag('PreviewImageStart'),
+ 0x0102: Tag('PreviewImageLength'),
+ 0x0200: TagDict('ExposureMode',
+ {1: 'Manual',
+ 2: 'Program',
+ 3: 'Aperture-priority AE',
+ 4: 'Shutter speed priority AE',
+ 5: 'Program-shift'}),
+ 0x0201: TagDict('AELock',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x0202: TagDict('MeteringMode',
+ {2: 'Center Weighted',
+ 3: 'Spot',
+ 5: 'ESP',
+ 261: 'Pattern+AF',
+ 515: 'Spot+Highlight control',
+ 1027: 'Spot+Shadow control'}),
+ 0x0300: TagDict('MacroMode',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x0301: TagDict('FocusMode',
+ {0: 'Single AF',
+ 1: 'Sequential shooting AF',
+ 2: 'Continuous AF',
+ 3: 'Multi AF',
+ 10: 'MF'}),
+ 0x0302: TagDict('FocusProcess',
+ {0: 'AF Not Used',
+ 1: 'AF Used'}),
+ 0x0303: TagDict('AFSearch',
+ {0: 'Not Ready',
+ 1: 'Ready'}),
+ 0x0304: Tag('AFAreas'),
+ 0x0401: Tag('FlashExposureCompensation'),
+ 0x0500: ('WhiteBalance2',
+ {0: 'Auto',
+ 16: '7500K (Fine Weather with Shade)',
+ 17: '6000K (Cloudy)',
+ 18: '5300K (Fine Weather)',
+ 20: '3000K (Tungsten light)',
+ 21: '3600K (Tungsten light-like)',
+ 33: '6600K (Daylight fluorescent)',
+ 34: '4500K (Neutral white fluorescent)',
+ 35: '4000K (Cool white fluorescent)',
+ 48: '3600K (Tungsten light-like)',
+ 256: 'Custom WB 1',
+ 257: 'Custom WB 2',
+ 258: 'Custom WB 3',
+ 259: 'Custom WB 4',
+ 512: 'Custom WB 5400K',
+ 513: 'Custom WB 2900K',
+ 514: 'Custom WB 8000K', }),
+ 0x0501: Tag('WhiteBalanceTemperature'),
+ 0x0502: Tag('WhiteBalanceBracket'),
+ 0x0503: Tag('CustomSaturation'), # (3 numbers: 1. CS Value, 2. Min, 3. Max)
+ 0x0504: TagDict('ModifiedSaturation',
+ {0: 'Off',
+ 1: 'CM1 (Red Enhance)',
+ 2: 'CM2 (Green Enhance)',
+ 3: 'CM3 (Blue Enhance)',
+ 4: 'CM4 (Skin Tones)'}),
+ 0x0505: Tag('ContrastSetting'), # (3 numbers: 1. Contrast, 2. Min, 3. Max)
+ 0x0506: Tag('SharpnessSetting'), # (3 numbers: 1. Sharpness, 2. Min, 3. Max)
+ 0x0507: TagDict('ColorSpace',
+ {0: 'sRGB',
+ 1: 'Adobe RGB',
+ 2: 'Pro Photo RGB'}),
+ 0x0509: TagDict('SceneMode',
+ {0: 'Standard',
+ 6: 'Auto',
+ 7: 'Sport',
+ 8: 'Portrait',
+ 9: 'Landscape+Portrait',
+ 10: 'Landscape',
+ 11: 'Night scene',
+ 13: 'Panorama',
+ 16: 'Landscape+Portrait',
+ 17: 'Night+Portrait',
+ 19: 'Fireworks',
+ 20: 'Sunset',
+ 22: 'Macro',
+ 25: 'Documents',
+ 26: 'Museum',
+ 28: 'Beach&Snow',
+ 30: 'Candle',
+ 35: 'Underwater Wide1',
+ 36: 'Underwater Macro',
+ 39: 'High Key',
+ 40: 'Digital Image Stabilization',
+ 44: 'Underwater Wide2',
+ 45: 'Low Key',
+ 46: 'Children',
+ 48: 'Nature Macro'}),
+ 0x050a: TagDict('NoiseReduction',
+ {0: 'Off',
+ 1: 'Noise Reduction',
+ 2: 'Noise Filter',
+ 3: 'Noise Reduction + Noise Filter',
+ 4: 'Noise Filter (ISO Boost)',
+ 5: 'Noise Reduction + Noise Filter (ISO Boost)'}),
+ 0x050b: TagDict('DistortionCorrection',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x050c: TagDict('ShadingCompensation',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x050d: Tag('CompressionFactor'),
+ 0x050f: TagDict('Gradation',
+ {'-1 -1 1': 'Low Key',
+ '0 -1 1': 'Normal',
+ '1 -1 1': 'High Key'}),
+ 0x0520: TagDict('PictureMode',
+ {1: 'Vivid',
+ 2: 'Natural',
+ 3: 'Muted',
+ 256: 'Monotone',
+ 512: 'Sepia'}),
+ 0x0521: Tag('PictureModeSaturation'),
+ 0x0522: Tag('PictureModeHue?'),
+ 0x0523: Tag('PictureModeContrast'),
+ 0x0524: Tag('PictureModeSharpness'),
+ 0x0525: TagDict('PictureModeBWFilter',
+ {0: 'n/a',
+ 1: 'Neutral',
+ 2: 'Yellow',
+ 3: 'Orange',
+ 4: 'Red',
+ 5: 'Green'}),
+ 0x0526: TagDict('PictureModeTone',
+ {0: 'n/a',
+ 1: 'Neutral',
+ 2: 'Sepia',
+ 3: 'Blue',
+ 4: 'Purple',
+ 5: 'Green'}),
+ 0x0600: Tag('Sequence'), # 2 or 3 numbers: 1. Mode, 2. Shot number, 3. Mode bits
+ 0x0601: Tag('PanoramaMode'), # (2 numbers: 1. Mode, 2. Shot number)
+ 0x0603: ('ImageQuality2',
+ {1: 'SQ',
+ 2: 'HQ',
+ 3: 'SHQ',
+ 4: 'RAW'}),
+ 0x0901: Tag('ManometerReading'),
+ }
+
+
+MAKERNOTE_CASIO_TAGS={
+ 0x0001: TagDict('RecordingMode',
+ {1: 'Single Shutter',
+ 2: 'Panorama',
+ 3: 'Night Scene',
+ 4: 'Portrait',
+ 5: 'Landscape'}),
+ 0x0002: TagDict('Quality',
+ {1: 'Economy',
+ 2: 'Normal',
+ 3: 'Fine'}),
+ 0x0003: TagDict('FocusingMode',
+ {2: 'Macro',
+ 3: 'Auto Focus',
+ 4: 'Manual Focus',
+ 5: 'Infinity'}),
+ 0x0004: TagDict('FlashMode',
+ {1: 'Auto',
+ 2: 'On',
+ 3: 'Off',
+ 4: 'Red Eye Reduction'}),
+ 0x0005: TagDict('FlashIntensity',
+ {11: 'Weak',
+ 13: 'Normal',
+ 15: 'Strong'}),
+ 0x0006: Tag('Object Distance'),
+ 0x0007: TagDict('WhiteBalance',
+ {1: 'Auto',
+ 2: 'Tungsten',
+ 3: 'Daylight',
+ 4: 'Fluorescent',
+ 5: 'Shade',
+ 129: 'Manual'}),
+ 0x000B: TagDict('Sharpness',
+ {0: 'Normal',
+ 1: 'Soft',
+ 2: 'Hard'}),
+ 0x000C: TagDict('Contrast',
+ {0: 'Normal',
+ 1: 'Low',
+ 2: 'High'}),
+ 0x000D: TagDict('Saturation',
+ {0: 'Normal',
+ 1: 'Low',
+ 2: 'High'}),
+ 0x0014: TagDict('CCDSpeed',
+ {64: 'Normal',
+ 80: 'Normal',
+ 100: 'High',
+ 125: '+1.0',
+ 244: '+3.0',
+ 250: '+2.0'}),
+ }
+
+MAKERNOTE_FUJIFILM_TAGS={
+ 0x0000: Tag('NoteVersion'),
+ 0x1000: Tag('Quality'),
+ 0x1001: TagDict('Sharpness',
+ {1: 'Soft',
+ 2: 'Soft',
+ 3: 'Normal',
+ 4: 'Hard',
+ 5: 'Hard'}),
+ 0x1002: TagDict('WhiteBalance',
+ {0: 'Auto',
+ 256: 'Daylight',
+ 512: 'Cloudy',
+ 768: 'DaylightColor-Fluorescent',
+ 769: 'DaywhiteColor-Fluorescent',
+ 770: 'White-Fluorescent',
+ 1024: 'Incandescent',
+ 3840: 'Custom'}),
+ 0x1003: TagDict('Color',
+ {0: 'Normal',
+ 256: 'High',
+ 512: 'Low'}),
+ 0x1004: TagDict('Tone',
+ {0: 'Normal',
+ 256: 'High',
+ 512: 'Low'}),
+ 0x1010: TagDict('FlashMode',
+ {0: 'Auto',
+ 1: 'On',
+ 2: 'Off',
+ 3: 'Red Eye Reduction'}),
+ 0x1011: Tag('FlashStrength'),
+ 0x1020: TagDict('Macro',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x1021: TagDict('FocusMode',
+ {0: 'Auto',
+ 1: 'Manual'}),
+ 0x1030: TagDict('SlowSync',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x1031: TagDict('PictureMode',
+ {0: 'Auto',
+ 1: 'Portrait',
+ 2: 'Landscape',
+ 4: 'Sports',
+ 5: 'Night',
+ 6: 'Program AE',
+ 256: 'Aperture Priority AE',
+ 512: 'Shutter Priority AE',
+ 768: 'Manual Exposure'}),
+ 0x1100: TagDict('MotorOrBracket',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x1300: TagDict('BlurWarning',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x1301: TagDict('FocusWarning',
+ {0: 'Off',
+ 1: 'On'}),
+ 0x1302: TagDict('AEWarning',
+ {0: 'Off',
+ 1: 'On'}),
+ }
+
+MAKERNOTE_CANON_TAGS = {
+ 0x0006: Tag('ImageType'),
+ 0x0007: Tag('FirmwareVersion'),
+ 0x0008: Tag('ImageNumber'),
+ 0x0009: Tag('OwnerName'),
+ }
+
+# this is in element offset, name, optional value dictionary format
+MAKERNOTE_CANON_TAG_0x001 = {
+ 1: TagDict('Macromode',
+ {1: 'Macro',
+ 2: 'Normal'}),
+ 2: Tag('SelfTimer'),
+ 3: TagDict('Quality',
+ {2: 'Normal',
+ 3: 'Fine',
+ 5: 'Superfine'}),
+ 4: TagDict('FlashMode',
+ {0: 'Flash Not Fired',
+ 1: 'Auto',
+ 2: 'On',
+ 3: 'Red-Eye Reduction',
+ 4: 'Slow Synchro',
+ 5: 'Auto + Red-Eye Reduction',
+ 6: 'On + Red-Eye Reduction',
+ 16: 'external flash'}),
+ 5: TagDict('ContinuousDriveMode',
+ {0: 'Single Or Timer',
+ 1: 'Continuous'}),
+ 7: TagDict('FocusMode',
+ {0: 'One-Shot',
+ 1: 'AI Servo',
+ 2: 'AI Focus',
+ 3: 'MF',
+ 4: 'Single',
+ 5: 'Continuous',
+ 6: 'MF'}),
+ 10: TagDict('ImageSize',
+ {0: 'Large',
+ 1: 'Medium',
+ 2: 'Small'}),
+ 11: TagDict('EasyShootingMode',
+ {0: 'Full Auto',
+ 1: 'Manual',
+ 2: 'Landscape',
+ 3: 'Fast Shutter',
+ 4: 'Slow Shutter',
+ 5: 'Night',
+ 6: 'B&W',
+ 7: 'Sepia',
+ 8: 'Portrait',
+ 9: 'Sports',
+ 10: 'Macro/Close-Up',
+ 11: 'Pan Focus'}),
+ 12: TagDict('DigitalZoom',
+ {0: 'None',
+ 1: '2x',
+ 2: '4x'}),
+ 13: TagDict('Contrast',
+ {0xFFFF: 'Low',
+ 0: 'Normal',
+ 1: 'High'}),
+ 14: TagDict('Saturation',
+ {0xFFFF: 'Low',
+ 0: 'Normal',
+ 1: 'High'}),
+ 15: TagDict('Sharpness',
+ {0xFFFF: 'Low',
+ 0: 'Normal',
+ 1: 'High'}),
+ 16: TagDict('ISO',
+ {0: 'See ISOSpeedRatings Tag',
+ 15: 'Auto',
+ 16: '50',
+ 17: '100',
+ 18: '200',
+ 19: '400'}),
+ 17: TagDict('MeteringMode',
+ {3: 'Evaluative',
+ 4: 'Partial',
+ 5: 'Center-weighted'}),
+ 18: TagDict('FocusType',
+ {0: 'Manual',
+ 1: 'Auto',
+ 3: 'Close-Up (Macro)',
+ 8: 'Locked (Pan Mode)'}),
+ 19: TagDict('AFPointSelected',
+ {0x3000: 'None (MF)',
+ 0x3001: 'Auto-Selected',
+ 0x3002: 'Right',
+ 0x3003: 'Center',
+ 0x3004: 'Left'}),
+ 20: TagDict('ExposureMode',
+ {0: 'Easy Shooting',
+ 1: 'Program',
+ 2: 'Tv-priority',
+ 3: 'Av-priority',
+ 4: 'Manual',
+ 5: 'A-DEP'}),
+ 23: Tag('LongFocalLengthOfLensInFocalUnits'),
+ 24: Tag('ShortFocalLengthOfLensInFocalUnits'),
+ 25: Tag('FocalUnitsPerMM'),
+ 28: TagDict('FlashActivity',
+ {0: 'Did Not Fire',
+ 1: 'Fired'}),
+ 29: TagDict('FlashDetails',
+ {14: 'External E-TTL',
+ 13: 'Internal Flash',
+ 11: 'FP Sync Used',
+ 7: '2nd("Rear")-Curtain Sync Used',
+ 4: 'FP Sync Enabled'}),
+ 32: TagDict('FocusMode',
+ {0: 'Single',
+ 1: 'Continuous'}),
+ }
+
+MAKERNOTE_CANON_TAG_0x004 = {
+ 7: TagDict('WhiteBalance',
+ {0: 'Auto',
+ 1: 'Sunny',
+ 2: 'Cloudy',
+ 3: 'Tungsten',
+ 4: 'Fluorescent',
+ 5: 'Flash',
+ 6: 'Custom'}),
+ 9: Tag('SequenceNumber'),
+ 14: Tag('AFPointUsed'),
+ 15: TagDict('FlashBias',
+ {0xFFC0: '-2 EV',
+ 0xFFCC: '-1.67 EV',
+ 0xFFD0: '-1.50 EV',
+ 0xFFD4: '-1.33 EV',
+ 0xFFE0: '-1 EV',
+ 0xFFEC: '-0.67 EV',
+ 0xFFF0: '-0.50 EV',
+ 0xFFF4: '-0.33 EV',
+ 0x0000: '0 EV',
+ 0x000C: '0.33 EV',
+ 0x0010: '0.50 EV',
+ 0x0014: '0.67 EV',
+ 0x0020: '1 EV',
+ 0x002C: '1.33 EV',
+ 0x0030: '1.50 EV',
+ 0x0034: '1.67 EV',
+ 0x0040: '2 EV'}),
+ 19: Tag('SubjectDistance'),
+ }
+
+# ratio object that eventually will be able to reduce itself to lowest
+# common denominator for printing
+# XXX: unused
+def gcd(a, b):
+ if b == 0:
+ return a
+ else:
+ return gcd(b, a % b)
+
+class Ratio:
+ def __init__(self, num, den):
+ self.num = num
+ self.den = den
+
+ def __repr__(self):
+ self.reduce()
+ if self.den == 1:
+ return str(self.num)
+ return '%d/%d' % (self.num, self.den)
+
+ def reduce(self):
+ div = gcd(self.num, self.den)
+ if div > 1:
+ self.num = self.num / div
+ self.den = self.den / div
+
+