/usr/lib/python3/dist-packages/raphodo/thumbnailextractor.py is in rapid-photo-downloader 0.9.9-1.
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# Copyright (C) 2015-2017 Damon Lynch <damonlynch@gmail.com>
# This file is part of Rapid Photo Downloader.
#
# Rapid Photo Downloader 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 3 of the License, or
# (at your option) any later version.
#
# Rapid Photo Downloader 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 Rapid Photo Downloader. If not,
# see <http://www.gnu.org/licenses/>.
__author__ = 'Damon Lynch'
__copyright__ = "Copyright 2015-2017, Damon Lynch"
import sys
import logging
from urllib.request import pathname2url
import pickle
import os
from collections import namedtuple
import tempfile
from datetime import datetime
from typing import Optional, Set, Union, Tuple
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst
from PyQt5.QtGui import QImage, QTransform
from PyQt5.QtCore import QSize, Qt, QIODevice, QBuffer
try:
import rawkit
import rawkit.options
import rawkit.raw
have_rawkit = True
except ImportError:
have_rawkit = False
from raphodo.interprocess import (
LoadBalancerWorker, ThumbnailExtractorArgument, GenerateThumbnailsResults
)
from raphodo.constants import (
ThumbnailSize, ExtractionTask, ExtractionProcessing, ThumbnailCacheStatus,
ThumbnailCacheDiskStatus
)
from raphodo.rpdfile import RPDFile, Video, Photo, FileType
from raphodo.utilities import stdchannel_redirected, show_errors
from raphodo.filmstrip import add_filmstrip
from raphodo.cache import ThumbnailCacheSql, FdoCacheLarge, FdoCacheNormal
import raphodo.exiftool as exiftool
import atexit
have_gst = Gst.init_check(None)
def gst_version() -> str:
"""
:return: version of gstreamer, if it exists and is functioning, else ''
"""
if have_gst:
try:
return Gst.version_string().replace('GStreamer ', '')
except Exception:
pass
return ''
def libraw_version(suppress_errors: bool=True) -> str:
"""
Return version number of libraw, using rawkit
:param suppress_errors:
:return: version number if available, else ''
"""
if not have_rawkit:
return ''
import libraw.bindings
try:
return libraw.bindings.LibRaw().version
except ImportError as e:
if not suppress_errors:
raise
v = str(e)
if v.startswith('Unsupported'):
import re
v = ''.join(re.findall(r'\d+\.?', str(e)))
return v[:-1] if v.endswith('.') else v
return v
except Exception:
if not suppress_errors:
raise
return ''
if not have_rawkit:
have_functioning_rawkit = False
else:
try:
have_functioning_rawkit = bool(libraw_version(suppress_errors=False))
except Exception:
have_functioning_rawkit = False
def rawkit_version() -> str:
if have_rawkit:
if have_functioning_rawkit:
return rawkit.VERSION
else:
return '{} (not functional)'.format(rawkit.VERSION)
return ''
def get_video_frame(full_file_name: str,
offset: Optional[float]=5.0,
caps=Gst.Caps.from_string('image/png')) -> Optional[bytes]:
"""
Source: https://gist.github.com/dplanella/5563018
:param full_file_name: file and path of the video
:param offset:
:param caps:
:return: gstreamer buffer
"""
logging.debug("Using gstreamer to generate thumbnail from %s", full_file_name)
pipeline = Gst.parse_launch('playbin')
pipeline.props.uri = 'file://{}'.format(pathname2url(os.path.abspath(full_file_name)))
pipeline.props.audio_sink = Gst.ElementFactory.make('fakesink', 'fakeaudio')
pipeline.props.video_sink = Gst.ElementFactory.make('fakesink', 'fakevideo')
pipeline.set_state(Gst.State.PAUSED)
# Wait for state change to finish.
pipeline.get_state(Gst.CLOCK_TIME_NONE)
# Seek offset seconds into the video, if the video is long enough
# If video is shorter than offset, seek 0.25 seconds less than the duration,
# but always at least zero.
offset = max(
min(
pipeline.query_duration(Gst.Format.TIME)[1] - Gst.SECOND / 4, offset * Gst.SECOND
), 0
)
try:
assert pipeline.seek_simple(Gst.Format.TIME, Gst.SeekFlags.FLUSH, offset)
except AssertionError:
logging.warning(
'seek_simple() failed for %s. Is the necessary gstreamer plugin installed for this '
'file format?', full_file_name
)
return None
# Wait for seek to finish.
pipeline.get_state(Gst.CLOCK_TIME_NONE) # alternative is Gst.SECOND * 10
sample = pipeline.emit('convert-sample', caps)
if sample is not None:
buffer = sample.get_buffer()
pipeline.set_state(Gst.State.NULL)
return buffer.extract_dup(0, buffer.get_size())
else:
return None
PhotoDetails = namedtuple('PhotoDetails', 'thumbnail, orientation')
def qimage_to_png_buffer(image: QImage) -> QBuffer:
"""
Save the image data in PNG format in a QBuffer, whose data can then
be extracted using the data() member function.
:param image: the image to be converted
:return: the buffer
"""
buffer = QBuffer()
buffer.open(QIODevice.WriteOnly)
# Quality 100 means uncompressed.
image.save(buffer, "PNG", quality=100)
return buffer
def crop_160x120_thumbnail(thumbnail: QImage, vertical_space: int=8) -> QImage:
"""
Remove black bands from the top and bottom of thumbnail
:param thumbnail: thumbnail to crop
:param vertical_space: how much to remove from the top and bottom
:return: cropped thumbnail
"""
return thumbnail.copy(0, vertical_space, 160, 120 - vertical_space * 2)
class ThumbnailExtractor(LoadBalancerWorker):
# Exif rotation constants
rotate_90 = '6'
rotate_180 = '3'
rotate_270 = '8'
maxStandardSize = QSize(
max(ThumbnailSize.width, ThumbnailSize.height),
max(ThumbnailSize.width, ThumbnailSize.height)
)
def __init__(self) -> None:
self.thumbnailSizeNeeded = QSize(ThumbnailSize.width, ThumbnailSize.height)
self.thumbnail_cache = ThumbnailCacheSql(create_table_if_not_exists=False)
self.fdo_cache_large = FdoCacheLarge()
self.fdo_cache_normal = FdoCacheNormal()
super().__init__('Thumbnail Extractor')
def rotate_thumb(self, thumbnail: QImage, orientation: str) -> QImage:
"""
If required return a rotated copy the thumbnail
:param thumbnail: thumbnail to rotate
:param orientation: EXIF orientation tag
:return: possibly rotated thumbnail
"""
if orientation == self.rotate_90:
thumbnail = thumbnail.transformed(QTransform().rotate(90))
elif orientation == self.rotate_270:
thumbnail = thumbnail.transformed(QTransform().rotate(270))
elif orientation == self.rotate_180:
thumbnail = thumbnail.transformed(QTransform().rotate(180))
return thumbnail
def image_large_enough(self, size: QSize) -> bool:
"""Check if image is equal or bigger than thumbnail size."""
return (
size.width() >= self.thumbnailSizeNeeded.width() or
size.height() >= self.thumbnailSizeNeeded.height()
)
def image_large_enough_fdo(self, size: QSize) -> bool:
return size.width() >= 256 or size.height() >= 256
def _extract_256_thumb(self, rpd_file: RPDFile,
processing: Set[ExtractionProcessing],
orientation: Optional[str]) -> PhotoDetails:
thumbnail = None
previews = rpd_file.metadata.get_preview_properties()
if previews:
for preview in previews:
if self.image_large_enough_fdo(QSize(preview.get_width(), preview.get_height())) \
and preview.get_mime_type() == 'image/jpeg':
break
# At this point we have a preview that may or may not be bigger than 160x120.
# On older RAW files, no. On newer RAW files, yes.
data = rpd_file.metadata.get_preview_image(preview).get_data()
if isinstance(data, bytes):
thumbnail = QImage.fromData(data)
if thumbnail.isNull():
thumbnail = None
else:
if thumbnail.width() > 160 or thumbnail.height() > 120:
processing.add(ExtractionProcessing.resize)
return PhotoDetails(thumbnail, orientation)
def _extract_metadata(self, rpd_file: RPDFile,
processing: Set[ExtractionProcessing]) -> PhotoDetails:
thumbnail = orientation = None
try:
orientation = rpd_file.metadata.get_tag_string('Exif.Image.Orientation')
except KeyError:
pass
rpd_file.mdatatime = rpd_file.metadata.timestamp(missing=0.0)
# Not all files have an exif preview, but some do
# (typically CR2, ARW, PEF, RW2).
# If they exist, they are (almost!) always 160x120
# TODO how about thumbnail_cache_status?
if self.write_fdo_thumbnail and rpd_file.fdo_thumbnail_256 is None:
photo_details = self._extract_256_thumb(rpd_file=rpd_file, processing=processing,
orientation=orientation)
if photo_details.thumbnail is not None:
return photo_details
# if no valid preview found, fall back to the code below and make do with the best
# we can get
ep = rpd_file.metadata.get_exif_thumbnail()
if ep:
thumbnail = QImage.fromData(rpd_file.metadata.get_exif_thumbnail())
if thumbnail.isNull():
thumbnail = None
elif thumbnail.width() == 120 and thumbnail.height() == 160:
# The Samsung Pro815 can store its thumbnails this way!
# Perhaps some other obscure cameras also do this too.
# The orientation has already been applied to the thumbnail
orientation = '1'
elif thumbnail.width() > 160 or thumbnail.height() > 120:
processing.add(ExtractionProcessing.resize)
elif not rpd_file.is_jpeg():
processing.add(ExtractionProcessing.strip_bars_photo)
else:
previews = rpd_file.metadata.get_preview_properties()
if previews:
# In every RAW file I've analyzed, the smallest preview is always first
preview = previews[0]
data = rpd_file.metadata.get_preview_image(preview).get_data()
if isinstance(data, bytes):
thumbnail = QImage.fromData(data)
if thumbnail.isNull():
thumbnail = None
else:
if thumbnail.width() > 160 or thumbnail.height() > 120:
processing.add(ExtractionProcessing.resize)
if not rpd_file.is_jpeg():
processing.add(ExtractionProcessing.strip_bars_photo)
return PhotoDetails(thumbnail, orientation)
def get_disk_photo_thumb(self, rpd_file: Photo,
full_file_name: str,
processing: Set[ExtractionProcessing]) -> PhotoDetails:
"""
Get the photo's thumbnail from a file that is on disk.
Sets rpd_file's mdatatime.
:param rpd_file: file details
:param full_file_name: full name of the file from which to get the metadata
:param processing: processing extraction tasks to complete
:return: thumbnail and its orientation
"""
orientation = None
thumbnail = None
photo_details = PhotoDetails(thumbnail, orientation)
if rpd_file.load_metadata(full_file_name=full_file_name, et_process=self.exiftool_process):
photo_details = self._extract_metadata(rpd_file, processing)
thumbnail = photo_details.thumbnail
if thumbnail is not None:
return photo_details
elif rpd_file.is_raw() and have_functioning_rawkit:
try:
with rawkit.raw.Raw(filename=full_file_name) as raw:
raw.options.white_balance = rawkit.options.WhiteBalance(camera=True, auto=False)
if rpd_file.cache_full_file_name and not rpd_file.download_full_file_name:
temp_file = '{}.tiff'.format(os.path.splitext(full_file_name)[0])
cache_dir = os.path.dirname(rpd_file.cache_full_file_name)
if os.path.isdir(cache_dir):
temp_file = os.path.join(cache_dir, temp_file)
temp_dir = None
else:
temp_dir = tempfile.mkdtemp(prefix="rpd-tmp-")
temp_file = os.path.join(temp_dir, temp_file)
else:
temp_dir = tempfile.mkdtemp(prefix="rpd-tmp-")
name = os.path.basename(full_file_name)
temp_file = '{}.tiff'.format(os.path.splitext(name)[0])
temp_file = os.path.join(temp_dir, temp_file)
try:
logging.debug("Saving temporary rawkit render to %s", temp_file)
raw.save(filename=temp_file)
except Exception:
logging.exception("Rendering %s failed. Exception:",
rpd_file.full_file_name)
else:
thumbnail = QImage(temp_file)
os.remove(temp_file)
if thumbnail.isNull():
logging.debug("Qt failed to load rendered %s", rpd_file.full_file_name)
thumbnail = None
else:
logging.debug("Rendered %s using libraw", rpd_file.full_file_name)
processing.add(ExtractionProcessing.resize)
# libraw already correctly oriented the thumbnail
processing.remove(ExtractionProcessing.orient)
orientation = '1'
if temp_dir:
os.rmdir(temp_dir)
except ImportError as e:
logging.warning('Cannot use rawkit to render thumbnail for %s',
rpd_file.full_file_name)
except Exception as e:
logging.exception("Rendering thumbnail for %s not supported. Exception:",
rpd_file.full_file_name)
if thumbnail is None and rpd_file.is_loadable():
thumbnail = QImage(full_file_name)
processing.add(ExtractionProcessing.resize)
if not rpd_file.from_camera:
processing.remove(ExtractionProcessing.orient)
if thumbnail.isNull():
thumbnail = None
logging.warning(
"Unable to create a thumbnail out of the file: {}".format(full_file_name))
return PhotoDetails(thumbnail, orientation)
def get_from_buffer(self, rpd_file: Photo,
raw_bytes: bytearray,
processing: Set[ExtractionProcessing]) -> PhotoDetails:
if not rpd_file.load_metadata(raw_bytes=raw_bytes, et_process=self.exiftool_process):
# logging.warning("Extractor failed to load metadata from extract of %s", rpd_file.name)
return PhotoDetails(None, None)
else:
return self._extract_metadata(rpd_file, processing)
def get_photo_orientation(self, rpd_file: Photo,
full_file_name: Optional[str]=None,
raw_bytes: Optional[bytearray]=None) -> Optional[str]:
if rpd_file.metadata is None:
self.load_photo_metadata(rpd_file=rpd_file, full_file_name=full_file_name,
raw_bytes=raw_bytes)
if rpd_file.metadata is not None:
try:
return rpd_file.metadata.get_tag_string('Exif.Image.Orientation')
except KeyError:
pass
return None
def assign_mdatatime(self, rpd_file: Union[Photo, Video],
full_file_name: Optional[str]=None,
raw_bytes: Optional[bytearray]=None) -> None:
"""
Load the file's metadata and assign the metadata time to the rpd file
"""
if rpd_file.file_type == FileType.photo:
self.assign_photo_mdatatime(rpd_file=rpd_file, full_file_name=full_file_name,
raw_bytes=raw_bytes)
else:
self.assign_video_mdatatime(rpd_file=rpd_file, full_file_name=full_file_name)
def assign_photo_mdatatime(self, rpd_file: Photo,
full_file_name: Optional[str]=None,
raw_bytes: Optional[bytearray]=None) -> None:
"""
Load the photo's metadata and assign the metadata time to the rpd file
"""
self.load_photo_metadata(rpd_file=rpd_file, full_file_name=full_file_name,
raw_bytes=raw_bytes)
if rpd_file.metadata is not None and rpd_file.date_time() is None:
rpd_file.mdatatime = 0.0
def load_photo_metadata(self, rpd_file: Photo,
full_file_name: Optional[str]=None,
raw_bytes: Optional[bytearray]=None) -> None:
"""
Load the photo's metadata into the rpd file
"""
if raw_bytes is not None:
if rpd_file.is_jpeg_type():
rpd_file.load_metadata(app1_segment=raw_bytes,
et_process=self.exiftool_process)
else:
rpd_file.load_metadata(raw_bytes=raw_bytes,
et_process=self.exiftool_process)
else:
rpd_file.load_metadata(full_file_name=full_file_name,
et_process=self.exiftool_process)
def assign_video_mdatatime(self, rpd_file: Video, full_file_name: str) -> None:
"""
Load the video's metadata and assign the metadata time to the rpd file
"""
if rpd_file.metadata is None:
rpd_file.load_metadata(full_file_name=full_file_name, et_process=self.exiftool_process)
if rpd_file.date_time() is None:
rpd_file.mdatatime = 0.0
def get_video_rotation(self, rpd_file: Video, full_file_name: str) -> Optional[str]:
"""
Some videos have a rotation tag. If this video does, return it.
"""
if rpd_file.metadata is None:
rpd_file.load_metadata(full_file_name=full_file_name, et_process=self.exiftool_process)
orientation = rpd_file.metadata.rotation(missing=None)
if orientation == 180:
return self.rotate_180
elif orientation == 90:
return self.rotate_90
elif orientation == 270:
return self.rotate_270
return None
def check_for_stop(self, directive: bytes, content: bytes):
if directive == b'cmd':
assert content == b'STOP'
return True
return False
def extact_thumbnail(self, task: ExtractionTask,
rpd_file: Union[Photo, Video],
processing: Set[ExtractionProcessing],
data: ThumbnailExtractorArgument
) -> Tuple[Optional[QImage], Optional[str]]:
"""
Extract the thumbnail using one of a variety of methods,
depending on the file
:param task: extraction task to perform
:param rpd_file: rpd_file to work on
:param processing: processing tasks
:param data: some other processing arguments passed to this process
:return: thumbnail and its orientation, if found
"""
orientation = None
if task == ExtractionTask.load_from_exif:
thumbnail_details = self.get_disk_photo_thumb(
rpd_file, data.full_file_name_to_work_on, processing)
thumbnail = thumbnail_details.thumbnail
if thumbnail is not None:
orientation = thumbnail_details.orientation
elif task in (ExtractionTask.load_file_directly,
ExtractionTask.load_file_and_exif_directly,
ExtractionTask.load_file_directly_metadata_from_secondary):
thumbnail = QImage(data.full_file_name_to_work_on)
if task == ExtractionTask.load_file_and_exif_directly:
self.assign_photo_mdatatime(
rpd_file=rpd_file, full_file_name=data.full_file_name_to_work_on
)
elif task == ExtractionTask.load_file_directly_metadata_from_secondary:
self.assign_mdatatime(
rpd_file=rpd_file, full_file_name=data.secondary_full_file_name
)
if ExtractionProcessing.orient in processing:
orientation = self.get_photo_orientation(
rpd_file=rpd_file, full_file_name=data.full_file_name_to_work_on
)
elif task in (ExtractionTask.load_from_bytes,
ExtractionTask.load_from_bytes_metadata_from_temp_extract):
thumbnail = QImage.fromData(data.thumbnail_bytes)
if thumbnail.width() > self.thumbnailSizeNeeded.width() or thumbnail.height()\
> self.thumbnailSizeNeeded.height():
processing.add(ExtractionProcessing.resize)
processing.remove(ExtractionProcessing.strip_bars_photo)
if data.exif_buffer and ExtractionProcessing.orient in processing:
orientation = self.get_photo_orientation(
rpd_file=rpd_file, raw_bytes=data.exif_buffer
)
if task == ExtractionTask.load_from_bytes_metadata_from_temp_extract:
self.assign_mdatatime(
rpd_file=rpd_file, full_file_name=data.secondary_full_file_name
)
os.remove(data.secondary_full_file_name)
rpd_file.temp_cache_full_file_chunk = ''
elif task == ExtractionTask.load_from_exif_buffer:
thumbnail_details = self.get_from_buffer(rpd_file, data.exif_buffer, processing)
thumbnail = thumbnail_details.thumbnail
if thumbnail is not None:
orientation = thumbnail_details.orientation
else:
assert task in (
ExtractionTask.extract_from_file, ExtractionTask.extract_from_file_and_load_metadata
)
assert rpd_file.file_type == FileType.video
if ExtractionTask.extract_from_file_and_load_metadata:
self.assign_video_mdatatime(
rpd_file=rpd_file, full_file_name=data.full_file_name_to_work_on
)
if not have_gst:
thumbnail = None
else:
png = get_video_frame(data.full_file_name_to_work_on, 0.0)
if not png:
thumbnail = None
logging.warning(
"Could not extract video thumbnail from %s",
data.rpd_file.get_display_full_name()
)
else:
thumbnail = QImage.fromData(png)
if thumbnail.isNull():
thumbnail = None
else:
processing.add(ExtractionProcessing.add_film_strip)
orientation = self.get_video_rotation(
rpd_file, data.full_file_name_to_work_on
)
if orientation is not None:
processing.add(ExtractionProcessing.orient)
processing.add(ExtractionProcessing.resize)
return thumbnail, orientation
def process_files(self):
"""
Loop continuously processing photo and video thumbnails
"""
logging.debug("{} worker started".format(self.requester.identity.decode()))
while True:
directive, content = self.requester.recv_multipart()
if self.check_for_stop(directive, content):
break
data = pickle.loads(content) # type: ThumbnailExtractorArgument
thumbnail_256 = png_data = None
task = data.task
processing = data.processing
rpd_file = data.rpd_file
logging.debug("Working on task %s for %s", task.name, rpd_file.download_name or
rpd_file.name)
self.write_fdo_thumbnail = data.write_fdo_thumbnail
try:
if rpd_file.fdo_thumbnail_256 is not None and data.write_fdo_thumbnail:
if rpd_file.thumbnail_status != ThumbnailCacheStatus.fdo_256_ready:
logging.error("Unexpected thumbnail cache status for %s: %s",
rpd_file.full_file_name, rpd_file.thumbnail_status.name)
thumbnail = thumbnail_256 = QImage.fromData(rpd_file.fdo_thumbnail_256)
orientation_unknown = False
else:
thumbnail, orientation = self.extact_thumbnail(task, rpd_file, processing, data)
if data.file_to_work_on_is_temporary:
os.remove(data.full_file_name_to_work_on)
rpd_file.temp_cache_full_file_chunk = ''
if thumbnail is not None:
if ExtractionProcessing.strip_bars_photo in processing:
thumbnail = crop_160x120_thumbnail(thumbnail)
elif ExtractionProcessing.strip_bars_video in processing:
thumbnail = crop_160x120_thumbnail(thumbnail, 15)
elif ExtractionProcessing.resize in processing:
# Resize the thumbnail before rotating
if ((orientation == '1' or orientation is None) and
thumbnail.height() > thumbnail.width()):
# Special case: pictures from some cellphones have already
# been rotated
thumbnail = thumbnail.scaled(
self.maxStandardSize,
Qt.KeepAspectRatio,
Qt.SmoothTransformation)
else:
if rpd_file.should_write_fdo() and \
self.image_large_enough_fdo(thumbnail.size()) \
and max(thumbnail.height(), thumbnail.width()) > 256:
thumbnail_256 = thumbnail.scaled(
QSize(256, 256),
Qt.KeepAspectRatio,
Qt.SmoothTransformation)
thumbnail = thumbnail_256
if data.send_thumb_to_main:
thumbnail = thumbnail.scaled(
self.thumbnailSizeNeeded,
Qt.KeepAspectRatio,
Qt.SmoothTransformation)
else:
thumbnail = None
if not thumbnail is None and thumbnail.isNull():
thumbnail = None
if orientation is not None:
if thumbnail is not None:
thumbnail = self.rotate_thumb(thumbnail, orientation)
if thumbnail_256 is not None:
thumbnail_256 = self.rotate_thumb(thumbnail_256, orientation)
if ExtractionProcessing.add_film_strip in processing:
if thumbnail is not None:
thumbnail = add_filmstrip(thumbnail)
if thumbnail_256 is not None:
thumbnail = add_filmstrip(thumbnail_256)
if thumbnail is not None:
buffer = qimage_to_png_buffer(thumbnail)
png_data = buffer.data()
orientation_unknown = (
ExtractionProcessing.orient in processing and orientation is None
)
if data.send_thumb_to_main and data.use_thumbnail_cache and \
rpd_file.thumbnail_cache_status == ThumbnailCacheDiskStatus.not_found:
self.thumbnail_cache.save_thumbnail(
full_file_name=rpd_file.full_file_name,
size=rpd_file.size,
mtime=rpd_file.modification_time,
mdatatime=rpd_file.mdatatime,
generation_failed=thumbnail is None,
orientation_unknown=orientation_unknown,
thumbnail=thumbnail,
camera_model=rpd_file.camera_model
)
if (thumbnail is not None or thumbnail_256 is not None) and \
rpd_file.should_write_fdo():
if self.write_fdo_thumbnail:
# The modification time of the file may have changed when the file was saved
# Ideally it shouldn't, but it does sometimes, e.g. on NTFS!
# So need to get the modification time from the saved file.
mtime = os.path.getmtime(rpd_file.download_full_file_name)
if thumbnail_256 is not None:
rpd_file.fdo_thumbnail_256_name = self.fdo_cache_large.save_thumbnail(
full_file_name=rpd_file.download_full_file_name,
size=rpd_file.size,
modification_time=mtime,
generation_failed=False,
thumbnail=thumbnail_256,
free_desktop_org=False
)
thumbnail_128 = thumbnail_256.scaled(
QSize(128, 128),
Qt.KeepAspectRatio,
Qt.SmoothTransformation
)
else:
thumbnail_128 = thumbnail.scaled(
QSize(128, 128),
Qt.KeepAspectRatio,
Qt.SmoothTransformation
)
rpd_file.fdo_thumbnail_128_name = self.fdo_cache_normal.save_thumbnail(
full_file_name=rpd_file.download_full_file_name,
size=rpd_file.size,
modification_time=mtime,
generation_failed=False,
thumbnail=thumbnail_128,
free_desktop_org=False
)
elif thumbnail_256 is not None and rpd_file.fdo_thumbnail_256 is None:
rpd_file.fdo_thumbnail_256 = qimage_to_png_buffer(thumbnail).data()
if thumbnail is not None:
if orientation_unknown:
rpd_file.thumbnail_status = ThumbnailCacheStatus.orientation_unknown
elif rpd_file.fdo_thumbnail_256 is not None:
rpd_file.thumbnail_status = ThumbnailCacheStatus.fdo_256_ready
else:
rpd_file.thumbnail_status = ThumbnailCacheStatus.ready
except SystemExit as e:
self.exiftool_process.terminate()
sys.exit(e)
except:
logging.error("Exception working on file %s", rpd_file.full_file_name)
logging.error("Task: %s", task)
logging.error("Processing tasks: %s", processing)
logging.exception("Traceback:")
# Purge metadata, as it cannot be pickled
if not data.send_thumb_to_main:
png_data = None
rpd_file.metadata = None
self.sender.send_multipart(
[
b'0', b'data',
pickle.dumps(
GenerateThumbnailsResults(rpd_file=rpd_file, thumbnail_bytes=png_data),
pickle.HIGHEST_PROTOCOL
)
]
)
self.requester.send_multipart([b'', b'', b'OK'])
def do_work(self):
if False:
# exiv2 pumps out a LOT to stderr - use cautiously!
context = show_errors()
self.error_stream = sys.stderr
else:
# Redirect stderr, hiding error output from exiv2
context = stdchannel_redirected(sys.stderr, os.devnull)
self.error_stream = sys.stdout
with context:
# In some situations, using a context manager for exiftool can
# result in exiftool processes not being terminated. So let's
# handle starting and terminating it manually.
self.exiftool_process = exiftool.ExifTool()
self.exiftool_process.start()
self.process_files()
self.exit()
def cleanup_pre_stop(self) -> None:
logging.debug(
"Terminating thumbnail extractor ExifTool process for %s", self.identity.decode()
)
self.exiftool_process.terminate()
if __name__ == "__main__":
thumbnail_extractor = ThumbnailExtractor()
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