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#!/usr/bin/python
# -*- coding: latin1 -*-
### Copyright (C) 2011-2012 Damon Lynch <damonlynch@gmail.com>
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
### GNU General Public License for more details.
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
### USA
import os.path, fractions
import subprocess
import multiprocessing
import logging
logger = multiprocessing.get_logger()
import rpdmultiprocessing as rpdmp
import rpdfile
import metadataxmp as mxmp
import subfolderfile
WRITE_XMP_INPLACE = rpdfile.NON_RAW_IMAGE_EXTENSIONS + ['dng']
def lossless_rotate(jpeg):
"""using exiftran, performs a lossless, inplace translation of a jpeg, preserving time stamps"""
try:
logger.debug("Auto rotating %s", jpeg)
proc = subprocess.Popen(['exiftran', '-a', '-i', '-p', jpeg], stdout=subprocess.PIPE)
v = proc.communicate()[0].strip()
except OSError:
v = None
return v
class FileModify(multiprocessing.Process):
def __init__(self, auto_rotate_jpeg, focal_length, results_pipe, terminate_queue,
run_event):
multiprocessing.Process.__init__(self)
self.results_pipe = results_pipe
self.terminate_queue = terminate_queue
self.run_event = run_event
self.auto_rotate_jpeg = auto_rotate_jpeg
self.focal_length = focal_length
def check_termination_request(self):
"""
Check to see this process has not been requested to immediately terminate
"""
if not self.terminate_queue.empty():
x = self.terminate_queue.get()
# terminate immediately
return True
return False
def create_rational(self, value):
return '%s/%s' % (value.numerator, value.denominator)
def run(self):
download_count = 0
copy_finished = False
while not copy_finished:
logger.debug("Finished %s. Getting next task.", download_count)
data = self.results_pipe.recv()
if len(data) > 2:
rpd_file, download_count, temp_full_file_name, thumbnail_icon, thumbnail, copy_finished = data
else:
rpd_file, copy_finished = data
if rpd_file is None:
# this is a termination signal
logger.info("Terminating file modify via pipe")
return None
# pause if instructed by the caller
self.run_event.wait()
if self.check_termination_request():
return None
if self.auto_rotate_jpeg and rpd_file.file_type == rpdfile.FILE_TYPE_PHOTO:
if rpd_file.extension in rpdfile.JPEG_EXTENSIONS:
lossless_rotate(rpd_file.temp_full_file_name)
xmp_sidecar = None
# check to see if focal length and aperture data should be manipulated
if self.focal_length is not None and rpd_file.file_type == rpdfile.FILE_TYPE_PHOTO:
if subfolderfile.load_metadata(rpd_file, temp_file=True):
a = rpd_file.metadata.aperture()
if a == '0.0':
logger.info("Adjusting focal length and aperture for %s (%s)", rpd_file.temp_full_file_name, rpd_file.name)
new_focal_length = fractions.Fraction(self.focal_length,1)
new_aperture = fractions.Fraction(8,1)
if rpd_file.extension in WRITE_XMP_INPLACE:
try:
rpd_file.metadata["Exif.Photo.FocalLength"] = new_focal_length
rpd_file.metadata["Exif.Photo.FNumber"] = new_aperture
rpd_file.metadata.write(preserve_timestamps=True)
logger.debug("Wrote new focal length and aperture to %s (%s)", rpd_file.temp_full_file_name, rpd_file.name)
except:
logger.error("failed to write new focal length and aperture to %s (%s)!", rpd_file.temp_full_file_name, rpd_file.name)
else:
# write to xmp sidecar
xmp_sidecar = mxmp.XmpMetadataSidecar(rpd_file.temp_full_file_name)
xmp_sidecar.set_exif_value('FocalLength', self.create_rational(new_focal_length))
xmp_sidecar.set_exif_value('FNumber', self.create_rational(new_aperture))
# store values in rpd_file, so they can be used in the subfolderfile process
rpd_file.new_focal_length = new_focal_length
rpd_file.new_aperture = new_aperture
if False:
xmp_sidecar.set_contact_url('http://www.website.net')
xmp_sidecar.set_contact_email('user@email.com')
if xmp_sidecar is not None:
# need to write out xmp sidecar
o = xmp_sidecar.write_xmp_sidecar()
logger.debug("Wrote XMP sidecar file")
logger.debug("exiv2 output: %s", o)
rpd_file.temp_xmp_full_name = rpd_file.temp_full_file_name + '.xmp'
copy_succeeded = True
rpd_file.metadata = None #purge metadata, as it cannot be pickled
self.results_pipe.send((rpdmp.CONN_PARTIAL,
(copy_succeeded, rpd_file, download_count,
temp_full_file_name,
thumbnail_icon, thumbnail)))
self.results_pipe.send((rpdmp.CONN_COMPLETE, None))
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