Changed static methods into class methods. #136
Since the static methods were being used as constructors, they really did deserve to be class methods.
This commit is contained in:
John Evans
parent
9840b66cae
commit
900a44f00b
1 changed files with 105 additions and 126 deletions
231
glymur/jp2box.py
231
glymur/jp2box.py
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@ -390,8 +390,8 @@ class ColourSpecificationBox(Jp2kBox):
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self.colorspace)
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fptr.write(read_buffer)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPEG 2000 color specification box.
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Parameters
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@ -434,14 +434,13 @@ class ColourSpecificationBox(Jp2kBox):
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profile = _ICCProfile(fptr.read(numbytes))
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icc_profile = profile.header
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box = ColourSpecificationBox(method=method,
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precedence=precedence,
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approximation=approximation,
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colorspace=colorspace,
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icc_profile=icc_profile,
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length=length,
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offset=offset)
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return box
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return cls(method=method,
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precedence=precedence,
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approximation=approximation,
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colorspace=colorspace,
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icc_profile=icc_profile,
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length=length,
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offset=offset)
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class _ICCProfile(object):
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@ -643,8 +642,8 @@ class ChannelDefinitionBox(Jp2kBox):
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self.channel_type[j],
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self.association[j]))
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse component definition box.
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Parameters
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@ -670,11 +669,10 @@ class ChannelDefinitionBox(Jp2kBox):
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channel_type = data[1:num_components * 6:3]
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association = data[2:num_components * 6:3]
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box = ChannelDefinitionBox(index=tuple(index),
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channel_type=tuple(channel_type),
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association=tuple(association),
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length=length, offset=offset)
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return box
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return cls(index=tuple(index),
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channel_type=tuple(channel_type),
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association=tuple(association),
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length=length, offset=offset)
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class CodestreamHeaderBox(Jp2kBox):
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@ -712,8 +710,8 @@ class CodestreamHeaderBox(Jp2kBox):
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"""
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self._write_superbox(fptr)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse codestream header box.
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Parameters
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@ -729,7 +727,7 @@ class CodestreamHeaderBox(Jp2kBox):
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-------
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CodestreamHeaderBox instance
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"""
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box = CodestreamHeaderBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The codestream header box is a superbox, so go ahead and parse its
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# child boxes.
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@ -781,8 +779,8 @@ class ColourGroupBox(Jp2kBox):
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self._validate(writing=True)
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self._write_superbox(fptr)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse colour group box.
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Parameters
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@ -798,7 +796,7 @@ class ColourGroupBox(Jp2kBox):
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-------
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ColourGroupBox instance
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"""
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box = ColourGroupBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The colour group box is a superbox, so go ahead and parse its
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# child boxes.
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@ -844,8 +842,8 @@ class CompositingLayerHeaderBox(Jp2kBox):
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"""
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self._write_superbox(fptr)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse compositing layer header box.
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Parameters
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@ -861,7 +859,7 @@ class CompositingLayerHeaderBox(Jp2kBox):
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-------
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CompositingLayerHeaderBox instance
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"""
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box = CompositingLayerHeaderBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# This box is a superbox, so go ahead and parse its # child boxes.
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box.box = box.parse_superbox(fptr)
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@ -935,8 +933,8 @@ class ComponentMappingBox(Jp2kBox):
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self.palette_index[j])
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fptr.write(write_buffer)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse component mapping box.
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Parameters
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@ -962,9 +960,8 @@ class ComponentMappingBox(Jp2kBox):
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mapping_type = data[1:num_bytes:3]
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palette_index = data[2:num_bytes:3]
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box = ComponentMappingBox(component_index, mapping_type, palette_index,
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length=length, offset=offset)
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return box
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return cls(component_index, mapping_type, palette_index,
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length=length, offset=offset)
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class ContiguousCodestreamBox(Jp2kBox):
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@ -1006,8 +1003,8 @@ class ContiguousCodestreamBox(Jp2kBox):
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return msg
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@staticmethod
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def parse(fptr, offset=0, length=0):
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@classmethod
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def parse(cls, fptr, offset=0, length=0):
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"""Parse a codestream box.
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Parameters
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@ -1024,9 +1021,7 @@ class ContiguousCodestreamBox(Jp2kBox):
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ContiguousCodestreamBox instance
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"""
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main_header = Codestream(fptr, length, header_only=True)
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box = ContiguousCodestreamBox(main_header, length=length,
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offset=offset)
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return box
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return cls(main_header, length=length, offset=offset)
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class DataReferenceBox(Jp2kBox):
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@ -1106,8 +1101,8 @@ class DataReferenceBox(Jp2kBox):
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msg = 'glymur.jp2box.DataReferenceBox()'
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse Label box.
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Parameters
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@ -1139,8 +1134,7 @@ class DataReferenceBox(Jp2kBox):
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box = DataEntryURLBox.parse(fptr, start, box_length)
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data_entry_url_box_list.append(box)
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return DataReferenceBox(data_entry_url_box_list,
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length=length, offset=offset)
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return cls(data_entry_url_box_list, length=length, offset=offset)
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class FileTypeBox(Jp2kBox):
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@ -1223,8 +1217,8 @@ class FileTypeBox(Jp2kBox):
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for item in self.compatibility_list:
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fptr.write(item.encode())
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPEG 2000 file type box.
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Parameters
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@ -1259,10 +1253,9 @@ class FileTypeBox(Jp2kBox):
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compatibility_list = compatibility_list
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box = FileTypeBox(brand=brand, minor_version=minor_version,
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compatibility_list=compatibility_list,
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length=length, offset=offset)
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return box
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return cls(brand=brand, minor_version=minor_version,
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compatibility_list=compatibility_list,
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length=length, offset=offset)
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class FragmentListBox(Jp2kBox):
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@ -1338,8 +1331,8 @@ class FragmentListBox(Jp2kBox):
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self.data_reference[j])
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fptr.write(write_buffer)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPX free box.
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Parameters
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@ -1363,8 +1356,8 @@ class FragmentListBox(Jp2kBox):
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frag_offset = lst[0::3]
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frag_len = lst[1::3]
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data_reference = lst[2::3]
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return FragmentListBox(frag_offset, frag_len, data_reference,
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length=length, offset=offset)
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return cls(frag_offset, frag_len, data_reference,
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length=length, offset=offset)
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class FragmentTableBox(Jp2kBox):
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@ -1395,8 +1388,8 @@ class FragmentTableBox(Jp2kBox):
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msg = self._str_superbox()
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPX fragment table superbox box.
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Parameters
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@ -1412,7 +1405,7 @@ class FragmentTableBox(Jp2kBox):
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-------
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FragmentTableBox instance
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"""
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box = FragmentTableBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The FragmentTable box is a superbox, so go ahead and parse its child
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# boxes.
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@ -1466,8 +1459,8 @@ class FreeBox(Jp2kBox):
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPX free box.
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Parameters
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@ -1483,7 +1476,7 @@ class FreeBox(Jp2kBox):
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-------
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FreeBox instance
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"""
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return FreeBox(length=length, offset=offset)
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return cls(length=length, offset=offset)
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class ImageHeaderBox(Jp2kBox):
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@ -1590,8 +1583,8 @@ class ImageHeaderBox(Jp2kBox):
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1 if self.ip_provided else 0)
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fptr.write(read_buffer)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPEG 2000 image header box.
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Parameters
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@ -1619,14 +1612,13 @@ class ImageHeaderBox(Jp2kBox):
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colorspace_unknown = True if params[5] else False
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ip_provided = True if params[6] else False
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box = ImageHeaderBox(height, width, num_components=num_components,
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bits_per_component=bits_per_component,
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signed=signed,
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compression=compression,
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colorspace_unknown=colorspace_unknown,
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ip_provided=ip_provided,
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length=length, offset=offset)
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return box
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return cls(height, width, num_components=num_components,
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bits_per_component=bits_per_component,
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signed=signed,
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compression=compression,
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colorspace_unknown=colorspace_unknown,
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ip_provided=ip_provided,
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length=length, offset=offset)
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class AssociationBox(Jp2kBox):
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@ -1659,8 +1651,8 @@ class AssociationBox(Jp2kBox):
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msg = self._str_superbox()
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse association box.
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Parameters
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@ -1676,7 +1668,7 @@ class AssociationBox(Jp2kBox):
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-------
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AssociationBox instance
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"""
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box = AssociationBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The Association box is a superbox, so go ahead and parse its child
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# boxes.
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@ -1725,8 +1717,8 @@ class JP2HeaderBox(Jp2kBox):
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"""
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self._write_superbox(fptr)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPEG 2000 header box.
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Parameters
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@ -1742,7 +1734,7 @@ class JP2HeaderBox(Jp2kBox):
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-------
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JP2HeaderBox instance
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"""
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box = JP2HeaderBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The JP2 header box is a superbox, so go ahead and parse its child
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# boxes.
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@ -1793,8 +1785,8 @@ class JPEG2000SignatureBox(Jp2kBox):
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fptr.write(b'jP ')
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fptr.write(struct.pack('>BBBB', *self.signature))
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse JPEG 2000 signature box.
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Parameters
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@ -1813,9 +1805,7 @@ class JPEG2000SignatureBox(Jp2kBox):
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read_buffer = fptr.read(4)
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signature = struct.unpack('>BBBB', read_buffer)
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box = JPEG2000SignatureBox(signature=signature, length=length,
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offset=offset)
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return box
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return cls(signature=signature, length=length, offset=offset)
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class PaletteBox(Jp2kBox):
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@ -1920,8 +1910,8 @@ class PaletteBox(Jp2kBox):
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write_buffer = struct.pack(fmt, *row)
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fptr.write(write_buffer)
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse palette box.
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Parameters
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@ -1966,7 +1956,7 @@ class PaletteBox(Jp2kBox):
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palette[j] = struct.unpack_from(fmt, read_buffer,
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offset=j * row_nbytes)
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return PaletteBox(palette, bps, signed, length=length, offset=offset)
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return cls(palette, bps, signed, length=length, offset=offset)
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# Map rreq codes to display text.
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@ -2132,8 +2122,8 @@ class ReaderRequirementsBox(Jp2kBox):
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse reader requirements box.
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Parameters
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@ -2179,10 +2169,9 @@ class ReaderRequirementsBox(Jp2kBox):
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msg += 'The box contents will not be interpreted.'
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warnings.warn(msg.format(mask_length), UserWarning)
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box = ReaderRequirementsBox(fuam, dcm, standard_flag, standard_mask,
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vendor_feature, vendor_mask,
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length=length, offset=offset)
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return box
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return cls(fuam, dcm, standard_flag, standard_mask,
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vendor_feature, vendor_mask,
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length=length, offset=offset)
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def _parse_rreq3(fptr, length, offset):
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@ -2340,8 +2329,8 @@ class ResolutionBox(Jp2kBox):
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msg = self._str_superbox()
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse Resolution box.
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Parameters
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@ -2357,7 +2346,7 @@ class ResolutionBox(Jp2kBox):
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-------
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ResolutionBox instance
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"""
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box = ResolutionBox(length=length, offset=offset)
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box = cls(length=length, offset=offset)
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# The JP2 header box is a superbox, so go ahead and parse its child
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# boxes.
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@ -2404,8 +2393,8 @@ class CaptureResolutionBox(Jp2kBox):
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msg += '\n HCR: {0}'.format(self.horizontal_resolution)
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse CaptureResolutionBox.
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Parameters
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@ -2426,9 +2415,7 @@ class CaptureResolutionBox(Jp2kBox):
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vres = rn1 / rd1 * math.pow(10, re1)
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hres = rn2 / rd2 * math.pow(10, re2)
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box = CaptureResolutionBox(vres, hres, length=length, offset=offset)
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return box
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return cls(vres, hres, length=length, offset=offset)
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class DisplayResolutionBox(Jp2kBox):
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@ -2469,8 +2456,8 @@ class DisplayResolutionBox(Jp2kBox):
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msg += '\n HDR: {0}'.format(self.horizontal_resolution)
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return msg
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@staticmethod
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def parse(fptr, offset, length):
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@classmethod
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def parse(cls, fptr, offset, length):
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"""Parse display resolution box.
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Parameters
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@ -2492,9 +2479,7 @@ class DisplayResolutionBox(Jp2kBox):
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vres = rn1 / rd1 * math.pow(10, re1)
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hres = rn2 / rd2 * math.pow(10, re2)
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box = DisplayResolutionBox(vres, hres, length=length, offset=offset)
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return box
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||||
return cls(vres, hres, length=length, offset=offset)
|
||||
|
||||
|
||||
class LabelBox(Jp2kBox):
|
||||
|
|
@ -2539,8 +2524,8 @@ class LabelBox(Jp2kBox):
|
|||
fptr.write(b'lbl ')
|
||||
fptr.write(self.label.encode())
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse Label box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2559,8 +2544,7 @@ class LabelBox(Jp2kBox):
|
|||
num_bytes = offset + length - fptr.tell()
|
||||
read_buffer = fptr.read(num_bytes)
|
||||
label = read_buffer.decode('utf-8')
|
||||
box = LabelBox(label, length=length, offset=offset)
|
||||
return box
|
||||
return cls(label, length=length, offset=offset)
|
||||
|
||||
|
||||
class NumberListBox(Jp2kBox):
|
||||
|
|
@ -2611,8 +2595,8 @@ class NumberListBox(Jp2kBox):
|
|||
msg = 'glymur.jp2box.NumberListBox()'
|
||||
return msg
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse number list box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2632,8 +2616,7 @@ class NumberListBox(Jp2kBox):
|
|||
raw_data = fptr.read(num_bytes)
|
||||
num_associations = int(len(raw_data) / 4)
|
||||
lst = struct.unpack('>' + 'I' * num_associations, raw_data)
|
||||
box = NumberListBox(lst, length=length, offset=offset)
|
||||
return box
|
||||
return cls(lst, length=length, offset=offset)
|
||||
|
||||
def write(self, fptr):
|
||||
"""Write a NumberList box to file.
|
||||
|
|
@ -2716,8 +2699,8 @@ class XMLBox(Jp2kBox):
|
|||
fptr.write(b'xml ')
|
||||
fptr.write(read_buffer)
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse XML box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2778,8 +2761,7 @@ class XMLBox(Jp2kBox):
|
|||
warnings.warn(msg, UserWarning)
|
||||
xml = None
|
||||
|
||||
box = XMLBox(xml=xml, length=length, offset=offset)
|
||||
return box
|
||||
return cls(xml=xml, length=length, offset=offset)
|
||||
|
||||
|
||||
class UUIDListBox(Jp2kBox):
|
||||
|
|
@ -2817,8 +2799,8 @@ class UUIDListBox(Jp2kBox):
|
|||
msg += '\n UUID[{0}]: {1}'.format(j, uuid_item)
|
||||
return msg
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse UUIDList box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2842,8 +2824,7 @@ class UUIDListBox(Jp2kBox):
|
|||
read_buffer = fptr.read(16)
|
||||
ulst.append(uuid.UUID(bytes=read_buffer))
|
||||
|
||||
box = UUIDListBox(ulst, length=length, offset=offset)
|
||||
return box
|
||||
return cls(ulst, length=length, offset=offset)
|
||||
|
||||
|
||||
class UUIDInfoBox(Jp2kBox):
|
||||
|
|
@ -2876,8 +2857,8 @@ class UUIDInfoBox(Jp2kBox):
|
|||
msg = self._str_superbox()
|
||||
return msg
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse UUIDInfo super box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2894,7 +2875,7 @@ class UUIDInfoBox(Jp2kBox):
|
|||
UUIDInfoBox instance
|
||||
"""
|
||||
|
||||
box = UUIDInfoBox(length=length, offset=offset)
|
||||
box = cls(length=length, offset=offset)
|
||||
|
||||
# The UUIDInfo box is a superbox, so go ahead and parse its child
|
||||
# boxes.
|
||||
|
|
@ -2969,8 +2950,8 @@ class DataEntryURLBox(Jp2kBox):
|
|||
self.url)
|
||||
return msg
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse data entry URL box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -2994,8 +2975,7 @@ class DataEntryURLBox(Jp2kBox):
|
|||
numbytes = offset + length - fptr.tell()
|
||||
read_buffer = fptr.read(numbytes)
|
||||
url = read_buffer.decode('utf-8').rstrip(chr(0))
|
||||
box = DataEntryURLBox(version, flag, url, length=length, offset=offset)
|
||||
return box
|
||||
return cls(version, flag, url, length=length, offset=offset)
|
||||
|
||||
|
||||
class UnknownBox(Jp2kBox):
|
||||
|
|
@ -3144,8 +3124,8 @@ class UUIDBox(Jp2kBox):
|
|||
fptr.write(self.uuid.bytes)
|
||||
fptr.write(self.raw_data)
|
||||
|
||||
@staticmethod
|
||||
def parse(fptr, offset, length):
|
||||
@classmethod
|
||||
def parse(cls, fptr, offset, length):
|
||||
"""Parse UUID box.
|
||||
|
||||
Parameters
|
||||
|
|
@ -3167,8 +3147,7 @@ class UUIDBox(Jp2kBox):
|
|||
|
||||
numbytes = offset + length - fptr.tell()
|
||||
read_buffer = fptr.read(numbytes)
|
||||
box = UUIDBox(the_uuid, read_buffer, length=length, offset=offset)
|
||||
return box
|
||||
return cls(the_uuid, read_buffer, length=length, offset=offset)
|
||||
|
||||
|
||||
# Map each box ID to the corresponding class.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue