def Clear( self ):
with self._lock:
self._data_cache.Clear()
self._special_thumbs = {}
names = [ 'hydrus', 'pdf', 'psd', 'audio', 'video', 'zip' ]
bounding_dimensions = self._controller.options[ 'thumbnail_dimensions' ]
for name in names:
path = os.path.join( HC.STATIC_DIR, name + '.png' )
numpy_image = ClientImageHandling.GenerateNumPyImage( path, HC.IMAGE_PNG )
numpy_image_resolution = HydrusImageHandling.GetResolutionNumPy( numpy_image )
target_resolution = HydrusImageHandling.GetThumbnailResolution( numpy_image_resolution, bounding_dimensions )
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution )
hydrus_bitmap = ClientRendering.GenerateHydrusBitmapFromNumPyImage( numpy_image )
self._special_thumbs[ name ] = hydrus_bitmap
self._controller.pub( 'notify_complete_thumbnail_reset' )
self._waterfall_queue_quick = set()
self._delayed_regeneration_queue_quick = set()
self._RecalcQueues()
def GenerateThumbnailBytes( path, target_resolution, mime, duration, num_frames, percentage_in = 35 ):
if mime in ( HC.IMAGE_JPEG, HC.IMAGE_PNG, HC.IMAGE_GIF, HC.IMAGE_WEBP, HC.IMAGE_TIFF, HC.IMAGE_ICON ): # not apng atm
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath( path, target_resolution, mime )
else:
if mime == HC.APPLICATION_FLASH:
( os_file_handle, temp_path ) = HydrusPaths.GetTempPath()
try:
HydrusFlashHandling.RenderPageToFile( path, temp_path, 1 )
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath( temp_path, target_resolution, mime )
except:
thumb_path = os.path.join( HC.STATIC_DIR, 'flash.png' )
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath( thumb_path, target_resolution, mime )
finally:
HydrusPaths.CleanUpTempPath( os_file_handle, temp_path )
else:
renderer = HydrusVideoHandling.VideoRendererFFMPEG( path, mime, duration, num_frames, target_resolution )
renderer.read_frame() # this initialises the renderer and loads the first frame as a fallback
desired_thumb_frame = int( ( percentage_in / 100.0 ) * num_frames )
renderer.set_position( desired_thumb_frame )
numpy_image = renderer.read_frame()
if numpy_image is None:
raise Exception( 'Could not create a thumbnail from that video!' )
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution ) # just in case ffmpeg doesn't deliver right
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesNumPy( numpy_image, mime )
renderer.Stop()
del renderer
return thumbnail_bytes
def _RenderCurrentFrame( self ):
if self._cv_mode:
try:
numpy_image = self._GetCurrentFrame()
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, self._target_resolution )
numpy_image = cv2.cvtColor( numpy_image, cv2.COLOR_BGR2RGB )
except HydrusExceptions.CantRenderWithCVException:
if self._last_frame is None:
if HG.media_load_report_mode:
HydrusData.ShowText( 'OpenCV Failed to render a frame' )
self._InitialisePIL()
numpy_image = self._RenderCurrentFrame()
else:
numpy_image = self._last_frame
else:
numpy_image = self._GetCurrentFrame()
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, self._target_resolution )
self._last_frame = numpy_image
return numpy_image
def Clear( self ):
with self._lock:
self._data_cache.Clear()
self._special_thumbs = {}
names = [ 'hydrus', 'pdf', 'psd', 'clip', 'audio', 'video', 'zip' ]
bounding_dimensions = self._controller.options[ 'thumbnail_dimensions' ]
thumbnail_scale_type = self._controller.new_options.GetInteger( 'thumbnail_scale_type' )
# it would be ideal to replace this with mimes_to_default_thumbnail_paths at a convenient point
for name in names:
path = os.path.join( HC.STATIC_DIR, '{}.png'.format( name ) )
numpy_image = ClientImageHandling.GenerateNumPyImage( path, HC.IMAGE_PNG )
numpy_image_resolution = HydrusImageHandling.GetResolutionNumPy( numpy_image )
( clip_rect, target_resolution ) = HydrusImageHandling.GetThumbnailResolutionAndClipRegion( numpy_image_resolution, bounding_dimensions, thumbnail_scale_type )
if clip_rect is not None:
numpy_image = HydrusImageHandling.ClipNumPyImage( numpy_image, clip_rect )
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution )
hydrus_bitmap = ClientRendering.GenerateHydrusBitmapFromNumPyImage( numpy_image )
self._special_thumbs[ name ] = hydrus_bitmap
self._controller.pub( 'notify_complete_thumbnail_reset' )
self._waterfall_queue_quick = set()
self._delayed_regeneration_queue_quick = set()
self._RecalcQueues()
def GenerateShapePerceptualHashes( path, mime ):
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: loading image' )
numpy_image = GenerateNumPyImage( path, mime )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: image shape: {}'.format( numpy_image.shape ) )
( y, x, depth ) = numpy_image.shape
if depth == 4:
# doing this on 10000x10000 pngs eats ram like mad
target_resolution = HydrusImageHandling.GetThumbnailResolution( ( x, y ), ( 1024, 1024 ) )
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, target_resolution )
( y, x, depth ) = numpy_image.shape
# create weight and transform numpy_image to greyscale
numpy_alpha = numpy_image[ :, :, 3 ]
numpy_alpha_float = numpy_alpha / 255.0
numpy_image_bgr = numpy_image[ :, :, :3 ]
numpy_image_gray_bare = cv2.cvtColor( numpy_image_bgr, cv2.COLOR_RGB2GRAY )
# create a white greyscale canvas
white = numpy.ones( ( y, x ) ) * 255.0
# paste the grayscale image onto the white canvas using: pixel * alpha + white * ( 1 - alpha )
numpy_image_gray = numpy.uint8( ( numpy_image_gray_bare * numpy_alpha_float ) + ( white * ( numpy.ones( ( y, x ) ) - numpy_alpha_float ) ) )
else:
numpy_image_gray = cv2.cvtColor( numpy_image, cv2.COLOR_RGB2GRAY )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: grey image shape: {}'.format( numpy_image_gray.shape ) )
numpy_image_tiny = cv2.resize( numpy_image_gray, ( 32, 32 ), interpolation = cv2.INTER_AREA )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: tiny image shape: {}'.format( numpy_image_tiny.shape ) )
# convert to float and calc dct
numpy_image_tiny_float = numpy.float32( numpy_image_tiny )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: tiny float image shape: {}'.format( numpy_image_tiny_float.shape ) )
HydrusData.ShowText( 'phash generation: generating dct' )
dct = cv2.dct( numpy_image_tiny_float )
# take top left 8x8 of dct
dct_88 = dct[:8,:8]
# get median of dct
# exclude [0,0], which represents flat colour
# this [0,0] exclusion is apparently important for mean, but maybe it ain't so important for median--w/e
# old mean code
# mask = numpy.ones( ( 8, 8 ) )
# mask[0,0] = 0
# average = numpy.average( dct_88, weights = mask )
median = numpy.median( dct_88.reshape( 64 )[1:] )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: median: {}'.format( median ) )
# make a monochromatic, 64-bit hash of whether the entry is above or below the median
dct_88_boolean = dct_88 > median
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: collapsing bytes' )
# convert TTTFTFTF to 11101010 by repeatedly shifting answer and adding 0 or 1
# you can even go ( a << 1 ) + b and leave out the initial param on the reduce call as bools act like ints for this
# but let's not go crazy for another two nanoseconds
def collapse_bools_to_binary_uint( a, b ):
return ( a << 1 ) + int( b )
list_of_bytes = []
for i in range( 8 ):
'''
# old way of doing it, which compared value to median every time
byte = 0
for j in range( 8 ):
byte <<= 1 # shift byte one left
value = dct_88[i,j]
if value > median:
byte |= 1
'''
# this is a 0-255 int
byte = reduce( collapse_bools_to_binary_uint, dct_88_boolean[i], 0 )
list_of_bytes.append( byte )
phash = bytes( list_of_bytes ) # this works!
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: phash: {}'.format( phash.hex() ) )
# now discard the blank hash, which is 1000000... and not useful
phashes = set()
phashes.add( phash )
phashes = DiscardBlankPerceptualHashes( phashes )
if HG.phash_generation_report_mode:
HydrusData.ShowText( 'phash generation: final phashes: {}'.format( len( phashes ) ) )
# we good
return phashes
def _GetThumbnailHydrusBitmap(self, display_media):
bounding_dimensions = self._controller.options['thumbnail_dimensions']
hash = display_media.GetHash()
mime = display_media.GetMime()
locations_manager = display_media.GetLocationsManager()
try:
path = self._controller.client_files_manager.GetThumbnailPath(
display_media)
except HydrusExceptions.FileMissingException as e:
if locations_manager.IsLocal():
summary = 'Unable to get thumbnail for file {}.'.format(
hash.hex())
self._HandleThumbnailException(e, summary)
return self._special_thumbs['hydrus']
try:
numpy_image = ClientImageHandling.GenerateNumPyImage(path, mime)
except Exception as e:
try:
# file is malformed, let's force a regen
self._controller.files_maintenance_manager.RunJobImmediately(
[display_media],
ClientFiles.REGENERATE_FILE_DATA_JOB_FORCE_THUMBNAIL,
pub_job_key=False)
except Exception as e:
summary = 'The thumbnail for file {} was not loadable. An attempt to regenerate it failed.'.format(
hash.hex())
self._HandleThumbnailException(e, summary)
return self._special_thumbs['hydrus']
try:
numpy_image = ClientImageHandling.GenerateNumPyImage(
path, mime)
except Exception as e:
summary = 'The thumbnail for file {} was not loadable. It was regenerated, but that file would not render either. Your image libraries or hard drive connection are unreliable. Please inform the hydrus developer what has happened.'.format(
hash.hex())
self._HandleThumbnailException(e, summary)
return self._special_thumbs['hydrus']
(current_width,
current_height) = HydrusImageHandling.GetResolutionNumPy(numpy_image)
(media_width, media_height) = display_media.GetResolution()
(expected_width,
expected_height) = HydrusImageHandling.GetThumbnailResolution(
(media_width, media_height), bounding_dimensions)
exactly_as_expected = current_width == expected_width and current_height == expected_height
rotation_exception = current_width == expected_height and current_height == expected_width
correct_size = exactly_as_expected or rotation_exception
if not correct_size:
it_is_definitely_too_big = current_width >= expected_width and current_height >= expected_height
if it_is_definitely_too_big:
if HG.file_report_mode:
HydrusData.ShowText('Thumbnail {} too big.'.format(
hash.hex()))
# the thumb we have is larger than desired. we can use it to generate what we actually want without losing significant data
# this is _resize_, not _thumbnail_, because we already know the dimensions we want
# and in some edge cases, doing getthumbresolution on existing thumb dimensions results in float/int conversion imprecision and you get 90px/91px regen cycles that never get fixed
numpy_image = HydrusImageHandling.ResizeNumPyImage(
numpy_image, (expected_width, expected_height))
if locations_manager.IsLocal():
# we have the master file, so it is safe to save our resized thumb back to disk since we can regen from source if needed
if HG.file_report_mode:
HydrusData.ShowText(
'Thumbnail {} too big, saving back to disk.'.
format(hash.hex()))
try:
try:
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesNumPy(
numpy_image, mime)
except HydrusExceptions.CantRenderWithCVException:
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
path, (expected_width, expected_height), mime)
except:
summary = 'The thumbnail for file {} was too large, but an attempt to shrink it failed.'.format(
hash.hex())
self._HandleThumbnailException(e, summary)
return self._special_thumbs['hydrus']
try:
self._controller.client_files_manager.AddThumbnailFromBytes(
hash, thumbnail_bytes, silent=True)
self._controller.files_maintenance_manager.ClearJobs(
{hash}, ClientFiles.
REGENERATE_FILE_DATA_JOB_REFIT_THUMBNAIL)
except:
summary = 'The thumbnail for file {} was too large, but an attempt to save back the shrunk file failed.'.format(
hash.hex())
self._HandleThumbnailException(e, summary)
return self._special_thumbs['hydrus']
else:
# the thumb we have is either too small or completely messed up due to a previous ratio misparse
media_is_same_size_as_current_thumb = current_width == media_width and current_height == media_height
if media_is_same_size_as_current_thumb:
# the thumb is smaller than expected, but this is a 32x32 pixilart image or whatever, so no need to scale
if HG.file_report_mode:
HydrusData.ShowText(
'Thumbnail {} too small due to small source file.'.
format(hash.hex()))
else:
numpy_image = HydrusImageHandling.ResizeNumPyImage(
numpy_image, (expected_width, expected_height))
if locations_manager.IsLocal():
# we have the master file, so we should regen the thumb from source
if HG.file_report_mode:
HydrusData.ShowText(
'Thumbnail {} too small, scheduling regeneration from source.'
.format(hash.hex()))
delayed_item = display_media.GetMediaResult()
with self._lock:
if delayed_item not in self._delayed_regeneration_queue_quick:
self._delayed_regeneration_queue_quick.add(
delayed_item)
self._delayed_regeneration_queue.append(
delayed_item)
else:
# we do not have the master file, so we have to scale up from what we have
if HG.file_report_mode:
HydrusData.ShowText(
'Thumbnail {} was too small, only scaling up due to no local source.'
.format(hash.hex()))
hydrus_bitmap = ClientRendering.GenerateHydrusBitmapFromNumPyImage(
numpy_image)
return hydrus_bitmap
def GenerateThumbnailBytes(path,
target_resolution,
mime,
duration,
num_frames,
percentage_in=35):
if mime in (HC.IMAGE_JPEG, HC.IMAGE_PNG, HC.IMAGE_GIF, HC.IMAGE_WEBP,
HC.IMAGE_TIFF, HC.IMAGE_ICON): # not apng atm
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
path, target_resolution, mime)
elif mime in [HC.APPLICATION_ZIP]:
temp_dir_path = HydrusPaths.GetTempDir()
try:
cmd = ["unzip", path, '-d', temp_dir_path]
subprocess.call(cmd)
cover = sorted(list(Path(temp_dir_path).rglob("*.jpg")) +
list(Path(temp_dir_path).rglob("*.png")),
key=lambda p: p.name)[0].as_posix()
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
cover, target_resolution, mime)
except Exception as e:
thumb_path = os.path.join(HC.STATIC_DIR, 'zip.png')
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
thumb_path, target_resolution, mime)
elif mime in [HC.APPLICATION_RAR]:
temp_dir_path = HydrusPaths.GetTempDir()
try:
cmd = ["unrar", 'x', path, temp_dir_path]
subprocess.call(cmd)
cover = sorted(list(Path(temp_dir_path).rglob("*.jpg")) +
list(Path(temp_dir_path).rglob("*.png")),
key=lambda p: p.name)[0].as_posix()
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
cover, target_resolution, mime)
except Exception as e:
thumb_path = os.path.join(HC.STATIC_DIR, 'rar.png')
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
thumb_path, target_resolution, mime)
else:
if mime == HC.APPLICATION_FLASH:
(os_file_handle, temp_path) = HydrusPaths.GetTempPath()
try:
HydrusFlashHandling.RenderPageToFile(path, temp_path, 1)
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
temp_path, target_resolution, mime)
except:
thumb_path = os.path.join(HC.STATIC_DIR, 'flash.png')
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesFromStaticImagePath(
thumb_path, target_resolution, mime)
finally:
HydrusPaths.CleanUpTempPath(os_file_handle, temp_path)
else:
renderer = HydrusVideoHandling.VideoRendererFFMPEG(
path, mime, duration, num_frames, target_resolution)
renderer.read_frame(
) # this initialises the renderer and loads the first frame as a fallback
desired_thumb_frame = int((percentage_in / 100.0) * num_frames)
renderer.set_position(desired_thumb_frame)
numpy_image = renderer.read_frame()
if numpy_image is None:
raise Exception(
'Could not create a thumbnail from that video!')
numpy_image = HydrusImageHandling.ResizeNumPyImage(
numpy_image,
target_resolution) # just in case ffmpeg doesn't deliver right
thumbnail_bytes = HydrusImageHandling.GenerateThumbnailBytesNumPy(
numpy_image, mime)
renderer.Stop()
del renderer
return thumbnail_bytes
def _GetThumbnailHydrusBitmap( self, display_media ):
hash = display_media.GetHash()
mime = display_media.GetMime()
thumbnail_mime = HC.IMAGE_JPEG
# we don't actually know this, it comes down to detailed stuff, but since this is png vs jpeg it isn't a huge deal down in the guts of image loading
# only really matters with transparency, so anything that can be transparent we'll prime with a png thing
# ain't like I am encoding EXIF rotation in my jpeg thumbs
if mime in ( HC.IMAGE_APNG, HC.IMAGE_PNG, HC.IMAGE_GIF, HC.IMAGE_ICON, HC.IMAGE_WEBP ):
thumbnail_mime = HC.IMAGE_PNG
locations_manager = display_media.GetLocationsManager()
try:
path = self._controller.client_files_manager.GetThumbnailPath( display_media )
except HydrusExceptions.FileMissingException as e:
if locations_manager.IsLocal():
summary = 'Unable to get thumbnail for file {}.'.format( hash.hex() )
self._HandleThumbnailException( e, summary )
return self._special_thumbs[ 'hydrus' ]
try:
numpy_image = ClientImageHandling.GenerateNumPyImage( path, thumbnail_mime )
except Exception as e:
try:
# file is malformed, let's force a regen
self._controller.files_maintenance_manager.RunJobImmediately( [ display_media ], ClientFiles.REGENERATE_FILE_DATA_JOB_FORCE_THUMBNAIL, pub_job_key = False )
except Exception as e:
summary = 'The thumbnail for file {} was not loadable. An attempt to regenerate it failed.'.format( hash.hex() )
self._HandleThumbnailException( e, summary )
return self._special_thumbs[ 'hydrus' ]
try:
numpy_image = ClientImageHandling.GenerateNumPyImage( path, thumbnail_mime )
except Exception as e:
summary = 'The thumbnail for file {} was not loadable. It was regenerated, but that file would not render either. Your image libraries or hard drive connection are unreliable. Please inform the hydrus developer what has happened.'.format( hash.hex() )
self._HandleThumbnailException( e, summary )
return self._special_thumbs[ 'hydrus' ]
( current_width, current_height ) = HydrusImageHandling.GetResolutionNumPy( numpy_image )
( media_width, media_height ) = display_media.GetResolution()
bounding_dimensions = self._controller.options[ 'thumbnail_dimensions' ]
thumbnail_scale_type = self._controller.new_options.GetInteger( 'thumbnail_scale_type' )
( clip_rect, ( expected_width, expected_height ) ) = HydrusImageHandling.GetThumbnailResolutionAndClipRegion( ( media_width, media_height ), bounding_dimensions, thumbnail_scale_type )
exactly_as_expected = current_width == expected_width and current_height == expected_height
rotation_exception = current_width == expected_height and current_height == expected_width
correct_size = exactly_as_expected or rotation_exception
if not correct_size:
numpy_image = HydrusImageHandling.ResizeNumPyImage( numpy_image, ( expected_width, expected_height ) )
if locations_manager.IsLocal():
# we have the master file, so we should regen the thumb from source
if HG.file_report_mode:
HydrusData.ShowText( 'Thumbnail {} too small, scheduling regeneration from source.'.format( hash.hex() ) )
delayed_item = display_media.GetMediaResult()
with self._lock:
if delayed_item not in self._delayed_regeneration_queue_quick:
self._delayed_regeneration_queue_quick.add( delayed_item )
self._delayed_regeneration_queue.append( delayed_item )
else:
# we do not have the master file, so we have to scale up from what we have
if HG.file_report_mode:
HydrusData.ShowText( 'Stored thumbnail {} was the wrong size, only scaling due to no local source.'.format( hash.hex() ) )
hydrus_bitmap = ClientRendering.GenerateHydrusBitmapFromNumPyImage( numpy_image )
return hydrus_bitmap