#!/usr/bin/env python

# -*- coding: utf-8 -*-

#

# Library to extract EXIF information from digital camera image files

# http://sourceforge.net/projects/exif-py/

#

# VERSION 1.0.7

#

# To use this library call with:

#    f = open(path_name, 'rb')

#    tags = EXIF.process_file(f)

#

# To ignore makerNote tags, pass the -q or --quick

# command line arguments, or as

#    f = open(path_name, 'rb')

#    tags = EXIF.process_file(f, details=False)

#

# To stop processing after a certain tag is retrieved,

# pass the -t TAG or --stop-tag TAG argument, or as

#    f = open(path_name, 'rb')

#    tags = EXIF.process_file(f, stop_tag='TAG')

#

# where TAG is a valid tag name, ex 'DateTimeOriginal'

#

# These are useful when you are retrieving a large list of images

#

# Returned tags will be a dictionary mapping names of EXIF tags to their

# values in the file named by path_name.  You can process the tags

# as you wish.  In particular, you can iterate through all the tags with:

#     for tag in tags.keys():

#         if tag not in ('JPEGThumbnail', 'TIFFThumbnail', 'Filename',

#                        'EXIF MakerNote'):

#             print "Key: %s, value %s" % (tag, tags[tag])

# (This code uses the if statement to avoid printing out a few of the

# tags that tend to be long or boring.)

#

# The tags dictionary will include keys for all of the usual EXIF

# tags, and will also include keys for Makernotes used by some

# cameras, for which we have a good specification.

#

# Note that the dictionary keys are the IFD name followed by the

# tag name. For example:

# 'EXIF DateTimeOriginal', 'Image Orientation', 'MakerNote FocusMode'

#

# Copyright (c) 2002-2007 Gene Cash All rights reserved

# Copyright (c) 2007 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.

#

#

# ----- See 'changes.txt' file for all contributors and changes ----- #

#

# Don't throw an exception when given an out of range character.

def make_string(seq):

    str = ""

    for c in seq:

        # Screen out non-printing characters

        if 32 <= c and c < 256:

            str += chr(c)

    # If no printing chars

    if not str:

        return seq

    return str

# Special version to deal with the code in the first 8 bytes of a user comment.

def make_string_uc(seq):

    code = seq[0:8]

    seq = seq[8:]

    # Of course, this is only correct if ASCII, and the standard explicitly

    # allows JIS and Unicode.

    return make_string(seq)

# field type descriptions as (length, abbreviation, full name) tuples

FIELD_TYPES = (

    (0, 'X', 'Proprietary'), # no such type

    (1, 'B', 'Byte'),

    (1, 'A', 'ASCII'),

    (2, 'S', 'Short'),

    (4, 'L', 'Long'),

    (8, 'R', 'Ratio'),

    (1, 'SB', 'Signed Byte'),

    (1, 'U', 'Undefined'),

    (2, 'SS', 'Signed Short'),

    (4, 'SL', 'Signed Long'),

    (8, 'SR', 'Signed Ratio'),

    )

# dictionary of main EXIF tag names

# first element of tuple is tag name, optional second element is

# another dictionary giving names to values

EXIF_TAGS = {

    0x0100: ('ImageWidth', ),

    0x0101: ('ImageLength', ),

    0x0102: ('BitsPerSample', ),

    0x0103: ('Compression',

             {1: 'Uncompressed TIFF',

              6: 'JPEG Compressed'}),

    0x0106: ('PhotometricInterpretation', ),

    0x010A: ('FillOrder', ),

    0x010D: ('DocumentName', ),

    0x010E: ('ImageDescription', ),

    0x010F: ('Make', ),

    0x0110: ('Model', ),

    0x0111: ('StripOffsets', ),

    0x0112: ('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: ('SamplesPerPixel', ),

    0x0116: ('RowsPerStrip', ),

    0x0117: ('StripByteCounts', ),

    0x011A: ('XResolution', ),

    0x011B: ('YResolution', ),

    0x011C: ('PlanarConfiguration', ),

    0x0128: ('ResolutionUnit',

             {1: 'Not Absolute',

              2: 'Pixels/Inch',

              3: 'Pixels/Centimeter'}),

    0x012D: ('TransferFunction', ),

    0x0131: ('Software', ),

    0x0132: ('DateTime', ),

    0x013B: ('Artist', ),

    0x013E: ('WhitePoint', ),

    0x013F: ('PrimaryChromaticities', ),

    0x0156: ('TransferRange', ),

    0x0200: ('JPEGProc', ),

    0x0201: ('JPEGInterchangeFormat', ),

    0x0202: ('JPEGInterchangeFormatLength', ),

    0x0211: ('YCbCrCoefficients', ),

    0x0212: ('YCbCrSubSampling', ),

    0x0213: ('YCbCrPositioning', ),

    0x0214: ('ReferenceBlackWhite', ),

    0x828D: ('CFARepeatPatternDim', ),

    0x828E: ('CFAPattern', ),

    0x828F: ('BatteryLevel', ),

    0x8298: ('Copyright', ),

    0x829A: ('ExposureTime', ),

    0x829D: ('FNumber', ),

    0x83BB: ('IPTC/NAA', ),

    0x8769: ('ExifOffset', ),

    0x8773: ('InterColorProfile', ),

    0x8822: ('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: ('SpectralSensitivity', ),

    0x8825: ('GPSInfo', ),

    0x8827: ('ISOSpeedRatings', ),

    0x8828: ('OECF', ),

    # print as string

    0x9000: ('ExifVersion', make_string),

    0x9003: ('DateTimeOriginal', ),

    0x9004: ('DateTimeDigitized', ),

    0x9101: ('ComponentsConfiguration',

             {0: '',

              1: 'Y',

              2: 'Cb',

              3: 'Cr',

              4: 'Red',

              5: 'Green',

              6: 'Blue'}),

    0x9102: ('CompressedBitsPerPixel', ),

    0x9201: ('ShutterSpeedValue', ),

    0x9202: ('ApertureValue', ),

    0x9203: ('BrightnessValue', ),

    0x9204: ('ExposureBiasValue', ),

    0x9205: ('MaxApertureValue', ),

    0x9206: ('SubjectDistance', ),

    0x9207: ('MeteringMode',

             {0: 'Unidentified',

              1: 'Average',

              2: 'CenterWeightedAverage',

              3: 'Spot',

              4: 'MultiSpot'}),

    0x9208: ('LightSource',

             {0: 'Unknown',

              1: 'Daylight',

              2: 'Fluorescent',

              3: 'Tungsten',

              10: 'Flash',

              17: 'Standard Light A',

              18: 'Standard Light B',

              19: 'Standard Light C',

              20: 'D55',

              21: 'D65',

              22: 'D75',

              255: 'Other'}),

    0x9209: ('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: ('FocalLength', ),

    0x9214: ('SubjectArea', ),

    0x927C: ('MakerNote', ),

    # print as string

    0x9286: ('UserComment', make_string_uc),  # First 8 bytes gives coding system e.g. ASCII vs. JIS vs Unicode

    0x9290: ('SubSecTime', ),

    0x9291: ('SubSecTimeOriginal', ),

    0x9292: ('SubSecTimeDigitized', ),

    # print as string

    0xA000: ('FlashPixVersion', make_string),

    0xA001: ('ColorSpace', ),

    0xA002: ('ExifImageWidth', ),

    0xA003: ('ExifImageLength', ),

    0xA005: ('InteroperabilityOffset', ),

    0xA20B: ('FlashEnergy', ),               # 0x920B in TIFF/EP

    0xA20C: ('SpatialFrequencyResponse', ),  # 0x920C    -  -

    0xA20E: ('FocalPlaneXResolution', ),     # 0x920E    -  -

    0xA20F: ('FocalPlaneYResolution', ),     # 0x920F    -  -

    0xA210: ('FocalPlaneResolutionUnit', ),  # 0x9210    -  -

    0xA214: ('SubjectLocation', ),           # 0x9214    -  -

    0xA215: ('ExposureIndex', ),             # 0x9215    -  -

    0xA217: ('SensingMethod', ),             # 0x9217    -  -

    0xA300: ('FileSource',

             {3: 'Digital Camera'}),

    0xA301: ('SceneType',

             {1: 'Directly Photographed'}),

    0xA302: ('CVAPattern', ),

    0xA401: ('CustomRendered', ),

    0xA402: ('ExposureMode',

             {0: 'Auto Exposure',

              1: 'Manual Exposure',

              2: 'Auto Bracket'}),

    0xA403: ('WhiteBalance',

             {0: 'Auto',

              1: 'Manual'}),

    0xA404: ('DigitalZoomRatio', ),

    0xA405: ('FocalLengthIn35mm', ),

    0xA406: ('SceneCaptureType', ),

    0xA407: ('GainControl', ),

    0xA408: ('Contrast', ),

    0xA409: ('Saturation', ),

    0xA40A: ('Sharpness', ),

    0xA40C: ('SubjectDistanceRange', ),

    }

# interoperability tags

INTR_TAGS = {

    0x0001: ('InteroperabilityIndex', ),

    0x0002: ('InteroperabilityVersion', ),

    0x1000: ('RelatedImageFileFormat', ),

    0x1001: ('RelatedImageWidth', ),

    0x1002: ('RelatedImageLength', ),

    }

# GPS tags (not used yet, haven't seen camera with GPS)

GPS_TAGS = {

    0x0000: ('GPSVersionID', ),

    0x0001: ('GPSLatitudeRef', ),

    0x0002: ('GPSLatitude', ),

    0x0003: ('GPSLongitudeRef', ),

    0x0004: ('GPSLongitude', ),

    0x0005: ('GPSAltitudeRef', ),

    0x0006: ('GPSAltitude', ),

    0x0007: ('GPSTimeStamp', ),

    0x0008: ('GPSSatellites', ),

    0x0009: ('GPSStatus', ),

    0x000A: ('GPSMeasureMode', ),

    0x000B: ('GPSDOP', ),

    0x000C: ('GPSSpeedRef', ),

    0x000D: ('GPSSpeed', ),

    0x000E: ('GPSTrackRef', ),

    0x000F: ('GPSTrack', ),

    0x0010: ('GPSImgDirectionRef', ),

    0x0011: ('GPSImgDirection', ),

    0x0012: ('GPSMapDatum', ),

    0x0013: ('GPSDestLatitudeRef', ),

    0x0014: ('GPSDestLatitude', ),

    0x0015: ('GPSDestLongitudeRef', ),

    0x0016: ('GPSDestLongitude', ),

    0x0017: ('GPSDestBearingRef', ),

    0x0018: ('GPSDestBearing', ),

    0x0019: ('GPSDestDistanceRef', ),

    0x001A: ('GPSDestDistance', ),

    }

# Ignore these tags when quick processing

# 0x927C is MakerNote Tags

# 0x9286 is user comment

IGNORE_TAGS=(0x9286, 0x927C)

# 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.

    #

    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: ('MakernoteVersion', make_string),	# Sometimes binary

    0x0002: ('ISOSetting', ),

    0x0003: ('ColorMode', ),

    0x0004: ('Quality', ),

    0x0005: ('Whitebalance', ),

    0x0006: ('ImageSharpening', ),

    0x0007: ('FocusMode', ),

    0x0008: ('FlashSetting', ),

    0x0009: ('AutoFlashMode', ),

    0x000B: ('WhiteBalanceBias', ),

    0x000C: ('WhiteBalanceRBCoeff', ),

    0x000D: ('ProgramShift', nikon_ev_bias),

    # Nearly the same as the other EV vals, but step size is 1/12 EV (?)

    0x000E: ('ExposureDifference', nikon_ev_bias),

    0x000F: ('ISOSelection', ),

    0x0011: ('NikonPreview', ),

    0x0012: ('FlashCompensation', nikon_ev_bias),

    0x0013: ('ISOSpeedRequested', ),

    0x0016: ('PhotoCornerCoordinates', ),

    # 0x0017: Unknown, but most likely an EV value

    0x0018: ('FlashBracketCompensationApplied', nikon_ev_bias),

    0x0019: ('AEBracketCompensationApplied', ),

    0x001A: ('ImageProcessing', ),

    0x0080: ('ImageAdjustment', ),

    0x0081: ('ToneCompensation', ),

    0x0082: ('AuxiliaryLens', ),

    0x0083: ('LensType', ),

    0x0084: ('LensMinMaxFocalMaxAperture', ),

    0x0085: ('ManualFocusDistance', ),

    0x0086: ('DigitalZoomFactor', ),

    0x0087: ('FlashMode',

             {0x00: 'Did Not Fire',

              0x01: 'Fired, Manual',

              0x07: 'Fired, External',

              0x08: 'Fired, Commander Mode ',

              0x09: 'Fired, TTL Mode'}),

    0x0088: ('AFFocusPosition',

             {0x0000: 'Center',

              0x0100: 'Top',

              0x0200: 'Bottom',

              0x0300: 'Left',