357 lines
10 KiB
Python
357 lines
10 KiB
Python
import gc
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import hashlib
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from . import HydrusAudioHandling
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from . import HydrusConstants as HC
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from . import HydrusData
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from . import HydrusDocumentHandling
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from . import HydrusExceptions
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from . import HydrusFlashHandling
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from . import HydrusImageHandling
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from . import HydrusPaths
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from . import HydrusText
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from . import HydrusVideoHandling
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import os
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import threading
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import traceback
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import io
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# Mime
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header_and_mime = [
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( 0, b'\xff\xd8', HC.IMAGE_JPEG ),
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( 0, b'GIF87a', HC.IMAGE_GIF ),
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( 0, b'GIF89a', HC.IMAGE_GIF ),
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( 0, b'\x89PNG', HC.UNDETERMINED_PNG ),
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( 0, b'BM', HC.IMAGE_BMP ),
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( 0, b'CWS', HC.APPLICATION_FLASH ),
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( 0, b'FWS', HC.APPLICATION_FLASH ),
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( 0, b'ZWS', HC.APPLICATION_FLASH ),
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( 0, b'FLV', HC.VIDEO_FLV ),
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( 0, b'%PDF', HC.APPLICATION_PDF ),
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( 0, b'PK\x03\x04', HC.APPLICATION_ZIP ),
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( 0, b'PK\x05\x06', HC.APPLICATION_ZIP ),
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( 0, b'PK\x07\x08', HC.APPLICATION_ZIP ),
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( 0, b'7z\xBC\xAF\x27\x1C', HC.APPLICATION_7Z ),
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( 0, b'\x52\x61\x72\x21\x1A\x07\x00', HC.APPLICATION_RAR ),
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( 0, b'\x52\x61\x72\x21\x1A\x07\x01\x00', HC.APPLICATION_RAR ),
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( 0, b'hydrus encrypted zip', HC.APPLICATION_HYDRUS_ENCRYPTED_ZIP ),
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( 4, b'ftypmp4', HC.VIDEO_MP4 ),
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( 4, b'ftypisom', HC.VIDEO_MP4 ),
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( 4, b'ftypM4V', HC.VIDEO_MP4 ),
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( 4, b'ftypMSNV', HC.VIDEO_MP4 ),
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( 4, b'ftypavc1', HC.VIDEO_MP4 ),
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( 4, b'ftypFACE', HC.VIDEO_MP4 ),
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( 4, b'ftypdash', HC.VIDEO_MP4 ),
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( 4, b'ftypqt', HC.VIDEO_MOV ),
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( 0, b'fLaC', HC.AUDIO_FLAC ),
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( 8, b'AVI ', HC.VIDEO_AVI ),
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( 0, b'\x30\x26\xB2\x75\x8E\x66\xCF\x11\xA6\xD9\x00\xAA\x00\x62\xCE\x6C', HC.UNDETERMINED_WM )
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]
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def SaveThumbnailToStreamPIL( pil_image, dimensions, f ):
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# when the palette is limited, the thumbnail antialias won't add new colours, so you get nearest-neighbour-like behaviour
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original_file_was_png = pil_image.format == 'PNG'
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pil_image = HydrusImageHandling.Dequantize( pil_image )
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HydrusImageHandling.EfficientlyThumbnailPILImage( pil_image, dimensions )
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if original_file_was_png or pil_image.mode == 'RGBA':
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pil_image.save( f, 'PNG' )
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else:
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pil_image.save( f, 'JPEG', quality = 92 )
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def GenerateThumbnail( path, mime, dimensions = HC.UNSCALED_THUMBNAIL_DIMENSIONS, percentage_in = 35 ):
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if mime in ( HC.IMAGE_JPEG, HC.IMAGE_PNG, HC.IMAGE_GIF ):
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thumbnail = GenerateThumbnailFromStaticImage( path, dimensions, mime )
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else:
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f = io.BytesIO()
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if mime == HC.APPLICATION_FLASH:
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( os_file_handle, temp_path ) = HydrusPaths.GetTempPath()
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try:
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HydrusFlashHandling.RenderPageToFile( path, temp_path, 1 )
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pil_image = HydrusImageHandling.GeneratePILImage( temp_path )
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SaveThumbnailToStreamPIL( pil_image, dimensions, f )
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except:
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flash_default_path = os.path.join( HC.STATIC_DIR, 'flash.png' )
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pil_image = HydrusImageHandling.GeneratePILImage( flash_default_path )
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SaveThumbnailToStreamPIL( pil_image, dimensions, f )
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finally:
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del pil_image
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HydrusPaths.CleanUpTempPath( os_file_handle, temp_path )
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else:
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( size, mime, width, height, duration, num_frames, num_words ) = GetFileInfo( path )
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cropped_dimensions = HydrusImageHandling.GetThumbnailResolution( ( width, height ), dimensions )
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renderer = HydrusVideoHandling.VideoRendererFFMPEG( path, mime, duration, num_frames, cropped_dimensions )
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renderer.read_frame() # this initialises the renderer and loads the first frame as a fallback
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desired_thumb_frame = int( ( percentage_in / 100.0 ) * num_frames )
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renderer.set_position( desired_thumb_frame )
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numpy_image = renderer.read_frame()
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if numpy_image is None:
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raise Exception( 'Could not create a thumbnail from that video!' )
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pil_image = HydrusImageHandling.GeneratePILImageFromNumpyImage( numpy_image )
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SaveThumbnailToStreamPIL( pil_image, dimensions, f )
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f.seek( 0 )
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thumbnail = f.read()
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f.close()
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return thumbnail
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def GenerateThumbnailFromStaticImagePIL( path, dimensions = HC.UNSCALED_THUMBNAIL_DIMENSIONS, mime = None ):
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f = io.BytesIO()
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pil_image = HydrusImageHandling.GeneratePILImage( path )
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SaveThumbnailToStreamPIL( pil_image, dimensions, f )
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f.seek( 0 )
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thumbnail = f.read()
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f.close()
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return thumbnail
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GenerateThumbnailFromStaticImage = GenerateThumbnailFromStaticImagePIL
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def GetExtraHashesFromPath( path ):
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h_md5 = hashlib.md5()
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h_sha1 = hashlib.sha1()
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h_sha512 = hashlib.sha512()
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with open( path, 'rb' ) as f:
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for block in HydrusPaths.ReadFileLikeAsBlocks( f ):
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h_md5.update( block )
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h_sha1.update( block )
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h_sha512.update( block )
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md5 = h_md5.digest()
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sha1 = h_sha1.digest()
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sha512 = h_sha512.digest()
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return ( md5, sha1, sha512 )
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def GetFileInfo( path, mime = None ):
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size = os.path.getsize( path )
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if size == 0:
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raise HydrusExceptions.SizeException( 'File is of zero length!' )
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if mime is None:
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mime = GetMime( path )
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if mime not in HC.ALLOWED_MIMES:
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if mime == HC.TEXT_HTML:
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raise HydrusExceptions.MimeException( 'Looks like HTML -- maybe the client needs to be taught how to parse this?' )
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elif mime == HC.APPLICATION_UNKNOWN:
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raise HydrusExceptions.MimeException( 'Unknown filetype!' )
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else:
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raise HydrusExceptions.MimeException( 'Filetype is not permitted!' )
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width = None
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height = None
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duration = None
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num_frames = None
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num_words = None
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if mime in ( HC.IMAGE_JPEG, HC.IMAGE_PNG, HC.IMAGE_GIF ):
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( ( width, height ), duration, num_frames ) = HydrusImageHandling.GetImageProperties( path, mime )
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elif mime == HC.APPLICATION_FLASH:
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( ( width, height ), duration, num_frames ) = HydrusFlashHandling.GetFlashProperties( path )
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elif mime in ( HC.IMAGE_APNG, HC.VIDEO_AVI, HC.VIDEO_FLV, HC.VIDEO_WMV, HC.VIDEO_MOV, HC.VIDEO_MP4, HC.VIDEO_MKV, HC.VIDEO_WEBM, HC.VIDEO_MPEG ):
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( ( width, height ), duration, num_frames ) = HydrusVideoHandling.GetFFMPEGVideoProperties( path )
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elif mime == HC.APPLICATION_PDF:
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num_words = HydrusDocumentHandling.GetPDFNumWords( path ) # this now give None until a better solution can be found
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elif mime in HC.AUDIO:
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ffmpeg_lines = HydrusVideoHandling.GetFFMPEGInfoLines( path )
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duration_in_s = HydrusVideoHandling.ParseFFMPEGDuration( ffmpeg_lines )
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duration = int( duration_in_s * 1000 )
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if width is not None and width < 0:
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width *= -1
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if height is not None and height < 0:
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width *= -1
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if duration is not None and duration < 0:
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duration *= -1
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if num_frames is not None and num_frames < 0:
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num_frames *= -1
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if num_words is not None and num_words < 0:
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num_words *= -1
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return ( size, mime, width, height, duration, num_frames, num_words )
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def GetHashFromPath( path ):
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h = hashlib.sha256()
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with open( path, 'rb' ) as f:
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for block in HydrusPaths.ReadFileLikeAsBlocks( f ):
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h.update( block )
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return h.digest()
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def GetMime( path ):
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size = os.path.getsize( path )
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if size == 0:
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raise HydrusExceptions.SizeException( 'File is of zero length!' )
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with open( path, 'rb' ) as f:
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bit_to_check = f.read( 256 )
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for ( offset, header, mime ) in header_and_mime:
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offset_bit_to_check = bit_to_check[ offset: ]
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if offset_bit_to_check.startswith( header ):
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if mime == HC.UNDETERMINED_WM:
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if HydrusVideoHandling.HasVideoStream( path ):
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return HC.VIDEO_WMV
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# we'll catch and verify wma later
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elif mime == HC.UNDETERMINED_PNG:
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if HydrusVideoHandling.HasVideoStream( path ):
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return HC.IMAGE_APNG
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else:
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return HC.IMAGE_PNG
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else:
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return mime
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try:
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mime = HydrusVideoHandling.GetMime( path )
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if mime != HC.APPLICATION_UNKNOWN:
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return mime
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except HydrusExceptions.MimeException:
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HydrusData.Print( 'FFMPEG couldn\'t figure out the mime for: ' + path )
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except Exception as e:
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HydrusData.Print( 'FFMPEG couldn\'t figure out the mime for: ' + path )
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HydrusData.PrintException( e, do_wait = False )
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if HydrusText.LooksLikeHTML( bit_to_check ):
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return HC.TEXT_HTML
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return HC.APPLICATION_UNKNOWN
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