123 lines
4.6 KiB
Python
123 lines
4.6 KiB
Python
import sys
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import json
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import piexif
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from . geo import decimal_to_dms
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#from .error import print_error
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class ExifEdit(object):
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def __init__(self, filename):
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"""Initialize the object"""
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self._filename = filename
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self._ef = None
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try:
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self._ef = piexif.load(filename)
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except IOError:
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etype, value, traceback = sys.exc_info()
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print >> sys.stderr, "Error opening file:", value
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except ValueError:
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etype, value, traceback = sys.exc_info()
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print >> sys.stderr, "Error opening file:", value
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def add_image_description(self, dict):
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"""Add a dict to image description."""
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if self._ef is not None:
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self._ef['0th'][piexif.ImageIFD.ImageDescription] = json.dumps(
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dict)
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def add_orientation(self, orientation):
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"""Add image orientation to image."""
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if not orientation in range(1, 9):
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print(
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"Error value for orientation, value must be in range(1,9), setting to default 1")
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self._ef['0th'][piexif.ImageIFD.Orientation] = 1
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else:
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self._ef['0th'][piexif.ImageIFD.Orientation] = orientation
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def add_date_time_original(self, date_time):
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"""Add date time original."""
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try:
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DateTimeOriginal = date_time.strftime('%Y:%m:%d %H:%M:%S')
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self._ef['Exif'][piexif.ExifIFD.DateTimeOriginal] = DateTimeOriginal
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except Exception as e:
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print("Error writing DateTimeOriginal, due to " + str(e))
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if date_time.microsecond != 0:
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self.add_subsectimeoriginal(date_time.microsecond)
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def add_subsectimeoriginal(self, subsec_value):
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"""Add subsecond value in the subsectimeoriginal exif tag"""
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try:
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subsec = str(subsec_value).zfill(6)
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self._ef['Exif'][piexif.ExifIFD.SubSecTimeOriginal] = subsec
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except Exception as e:
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print("Error writing SubSecTimeOriginal, due to " + str(e))
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def add_lat_lon(self, lat, lon, precision=1e7):
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"""Add lat, lon to gps (lat, lon in float)."""
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self._ef["GPS"][piexif.GPSIFD.GPSLatitudeRef] = "N" if lat > 0 else "S"
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self._ef["GPS"][piexif.GPSIFD.GPSLongitudeRef] = "E" if lon > 0 else "W"
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self._ef["GPS"][piexif.GPSIFD.GPSLongitude] = decimal_to_dms(
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abs(lon), int(precision))
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self._ef["GPS"][piexif.GPSIFD.GPSLatitude] = decimal_to_dms(
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abs(lat), int(precision))
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def add_image_history(self, data):
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"""Add arbitrary string to ImageHistory tag."""
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self._ef['0th'][piexif.ImageIFD.ImageHistory] = json.dumps(data)
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def add_camera_make_model(self, make, model):
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''' Add camera make and model.'''
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self._ef['0th'][piexif.ImageIFD.Make] = make
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self._ef['0th'][piexif.ImageIFD.Model] = model
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def add_dop(self, dop, precision=100):
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"""Add GPSDOP (float)."""
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self._ef["GPS"][piexif.GPSIFD.GPSDOP] = (
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int(abs(dop) * precision), precision)
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def add_altitude(self, altitude, precision=100):
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"""Add altitude (pre is the precision)."""
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ref = 0 if altitude > 0 else 1
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self._ef["GPS"][piexif.GPSIFD.GPSAltitude] = (
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int(abs(altitude) * precision), precision)
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self._ef["GPS"][piexif.GPSIFD.GPSAltitudeRef] = ref
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def add_direction(self, direction, ref="T", precision=100):
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"""Add image direction."""
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# normalize direction
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direction = direction % 360.0
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self._ef["GPS"][piexif.GPSIFD.GPSImgDirection] = (
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int(abs(direction) * precision), precision)
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self._ef["GPS"][piexif.GPSIFD.GPSImgDirectionRef] = ref
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def add_firmware(self,firmware_string):
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"""Add firmware version of camera"""
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self._ef['0th'][piexif.ImageIFD.Software] = firmware_string
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def add_custom_tag(self, value, main_key, tag_key):
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try:
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self._ef[main_key][tag_key] = value
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except:
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print("could not set tag {} under {} with value {}".format(
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tag_key, main_key, value))
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def write(self, filename=None):
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"""Save exif data to file."""
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if filename is None:
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filename = self._filename
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exif_bytes = piexif.dump(self._ef)
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with open(self._filename, "rb") as fin:
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img = fin.read()
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try:
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piexif.insert(exif_bytes, img, filename)
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except IOError:
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type, value, traceback = sys.exc_info()
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print >> sys.stderr, "Error saving file:", value
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