mirror of
https://github.com/SickGear/SickGear.git
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980e05cc99
Backported 400 revisions from rev 1de4961-8897c5b (2018-2014).
Move core/benchmark, core/cmd_line, core/memory, core/profiler and core/timeout to core/optional/*
Remove metadata/qt*
PORT: Version 2.0a3 (inline with 3.0a3 @ f80c7d5).
Basic Support for XMP Packets.
tga: improvements to adhere more closely to the spec.
pdf: slightly improved parsing.
rar: fix TypeError on unknown block types.
Add MacRoman win32 codepage.
tiff/exif: support SubIFDs and tiled images.
Add method to export metadata in dictionary.
mpeg_video: don't attempt to parse Stream past length.
mpeg_video: parse ESCR correctly, add SCR value.
Change centralise CustomFragments.
field: don't set parser class if class is None, to enable autodetect.
field: add value/display for CustomFragment.
parser: inline warning to enable tracebacks in debug mode.
Fix empty bytestrings in makePrintable.
Fix contentSize in jpeg.py to account for image_data blocks.
Fix the ELF parser.
Enhance the AR archive parser.
elf parser: fix wrong wrong fields order in parsing little endian section flags.
elf parser: add s390 as a machine type.
Flesh out mp4 parser.
PORT: Version 2.0a1 (inline with 3.0a1).
Major refactoring and PEP8.
Fix ResourceWarning warnings on files. Add a close() method and support for the context manager protocol ("with obj: ...") to parsers, input and output streams.
metadata: get comment from ZIP.
Support for InputIOStream.read(0).
Fix sizeGe when size is None.
Remove unused new_seekable_field_set file.
Remove parser Mapsforge .map.
Remove parser Parallel Realities Starfighter .pak files.
sevenzip: fix for newer archives.
java: update access flags and modifiers for Java 1.7 and update description text for most recent Java.
Support ustar prefix field in tar archives.
Remove file_system* parsers.
Remove misc parsers 3d0, 3ds, gnome_keyring, msoffice*, mstask, ole*, word*.
Remove program parsers macho, nds, prc.
Support non-8bit Character subclasses.
Python parser supports Python 3.7.
Enhance mpeg_ts parser to support MTS/M2TS.
Support for creation date in tiff.
Change don't hardcode errno constant.
PORT: 1.9.1
Internal Only: The following are legacy reference to upstream commit messages.
Relevant changes up to b0a115f8.
Use integer division.
Replace HACHOIR_ERRORS with Exception.
Fix metadata.Data: make it sortable.
Import fixes from e7de492.
PORT: Version 2.0a1 (inline with 3.0a1 @ e9f8fad).
Replace hachoir.core.field with hachoir.field
Replace hachoir.core.stream with hachoir.stream
Remove the compatibility module for PY1.5 to PY2.5.
metadata: support TIFF picture.
metadata: fix string normalization.
metadata: fix datetime regex Fix hachoir bug #57.
FileFromInputStream: fix comparison between None and an int.
InputIOStream: open the file in binary mode.
102 lines
3.5 KiB
Python
102 lines
3.5 KiB
Python
from hachoir.field import Bit, Bits, FieldSet
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from hachoir.core.endian import BIG_ENDIAN, LITTLE_ENDIAN
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import struct
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# Make sure that we use right struct types
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assert struct.calcsize("f") == 4
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assert struct.calcsize("d") == 8
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assert struct.unpack("<d", "\x1f\x85\xebQ\xb8\x1e\t@")[0] == 3.14
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assert struct.unpack(">d", "\xc0\0\0\0\0\0\0\0")[0] == -2.0
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class FloatMantissa(Bits):
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def createValue(self):
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value = Bits.createValue(self)
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return 1 + float(value) / (2 ** self.size)
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def createRawDisplay(self):
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return unicode(Bits.createValue(self))
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class FloatExponent(Bits):
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def __init__(self, parent, name, size):
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Bits.__init__(self, parent, name, size)
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self.bias = 2 ** (size - 1) - 1
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def createValue(self):
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return Bits.createValue(self) - self.bias
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def createRawDisplay(self):
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return unicode(self.value + self.bias)
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def floatFactory(name, format, mantissa_bits, exponent_bits, doc):
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size = 1 + mantissa_bits + exponent_bits
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class Float(FieldSet):
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static_size = size
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__doc__ = doc
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def __init__(self, parent, name, description=None):
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assert parent.endian in (BIG_ENDIAN, LITTLE_ENDIAN)
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FieldSet.__init__(self, parent, name, description, size)
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if format:
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if self._parent.endian == BIG_ENDIAN:
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self.struct_format = ">" + format
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else:
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self.struct_format = "<" + format
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else:
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self.struct_format = None
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def createValue(self):
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"""
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Create float value: use struct.unpack() when it's possible
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(32 and 64-bit float) or compute it with :
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mantissa * (2.0 ** exponent)
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This computation may raise an OverflowError.
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"""
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if self.struct_format:
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raw = self._parent.stream.readBytes(
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self.absolute_address, self._size // 8)
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try:
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return struct.unpack(self.struct_format, raw)[0]
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except struct.error, err:
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raise ValueError("[%s] conversion error: %s" %
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(self.__class__.__name__, err))
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else:
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try:
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value = self["mantissa"].value * (2.0 ** float(self["exponent"].value))
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if self["negative"].value:
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return -(value)
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else:
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return value
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except OverflowError:
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raise ValueError("[%s] floating point overflow" %
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self.__class__.__name__)
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def createFields(self):
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yield Bit(self, "negative")
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yield FloatExponent(self, "exponent", exponent_bits)
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if 64 <= mantissa_bits:
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yield Bit(self, "one")
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yield FloatMantissa(self, "mantissa", mantissa_bits - 1)
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else:
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yield FloatMantissa(self, "mantissa", mantissa_bits)
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cls = Float
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cls.__name__ = name
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return cls
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# 32-bit float (standard: IEEE 754/854)
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Float32 = floatFactory("Float32", "f", 23, 8,
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"Floating point number: format IEEE 754 int 32 bit")
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# 64-bit float (standard: IEEE 754/854)
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Float64 = floatFactory("Float64", "d", 52, 11,
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"Floating point number: format IEEE 754 in 64 bit")
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# 80-bit float (standard: IEEE 754/854)
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Float80 = floatFactory("Float80", None, 64, 15,
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"Floating point number: format IEEE 754 in 80 bit")
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