jyapayne/glymur
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #214 from bogdanni/patch-1

Browse source 
Small cleanups in jp2box.py
This commit is contained in:
quintusdias 2014-04-08 21:06:58 -04:00
commit 446a9be1ce
1 changed files with 10 additions and 22 deletions
Download patch file Download diff file Expand all files Collapse all files

32
glymur/jp2box.py
View file

@ -393,8 +393,7 @@ class ColourSpecificationBox(Jp2kBox):
"""
self._write_validate()
length = 15 if self.icc_profile is None else 11 + len(self.icc_profile)
fptr.write(struct.pack('>I', length))
fptr.write(b'colr')
fptr.write(struct.pack('>I4s', length, b'colr'))
read_buffer = struct.pack('>BBBI',
self.method,
@ -646,8 +645,7 @@ class ChannelDefinitionBox(Jp2kBox):
"""
self._validate(writing=True)
num_components = len(self.association)
fptr.write(struct.pack('>I', 8 + 2 + num_components * 6))
fptr.write(b'cdef')
fptr.write(struct.pack('>I4s', 8 + 2 + num_components * 6, b'cdef'))
fptr.write(struct.pack('>H', num_components))
for j in range(num_components):
fptr.write(struct.pack('>' + 'H' * 3,
@ -1108,8 +1106,7 @@ class DataReferenceBox(Jp2kBox):
# Very similar to the say a superbox is written.
orig_pos = fptr.tell()
fptr.write(struct.pack('>I', 0))
fptr.write(b'dtbl')
fptr.write(struct.pack('>I4s', 0, b'dtbl'))
# Write the number of data entry url boxes.
write_buffer = struct.pack('>H', len(self.DR))
@ -1254,8 +1251,7 @@ class FileTypeBox(Jp2kBox):
"""
self._validate(writing=True)
length = 16 + 4*len(self.compatibility_list)
fptr.write(struct.pack('>I', length))
fptr.write(b'ftyp')
fptr.write(struct.pack('>I4s', length, b'ftyp'))
fptr.write(self.brand.encode())
fptr.write(struct.pack('>I', self.minor_version))
@ -1295,8 +1291,6 @@ class FileTypeBox(Jp2kBox):
entry = entry.decode('utf-8')
compatibility_list.append(entry)
compatibility_list = compatibility_list
return cls(brand=brand, minor_version=minor_version,
compatibility_list=compatibility_list,
length=length, offset=offset)
@ -1365,8 +1359,7 @@ class FragmentListBox(Jp2kBox):
self._validate(writing=True)
num_items = len(self.fragment_offset)
length = 8 + 2 + num_items * 14
fptr.write(struct.pack('>I', length))
fptr.write(b'flst')
fptr.write(struct.pack('>I4s', length, b'flst'))
fptr.write(struct.pack('>H', num_items))
for j in range(num_items):
write_buffer = struct.pack('>QIH',
@ -1613,8 +1606,7 @@ class ImageHeaderBox(Jp2kBox):
def write(self, fptr):
"""Write an Image Header box to file.
"""
fptr.write(struct.pack('>I', 22))
fptr.write(b'ihdr')
fptr.write(struct.pack('>I4s', 22, b'ihdr'))
# signedness and bps are stored together in a single byte
bit_depth_signedness = 0x80 if self.signed else 0x00
@ -1827,8 +1819,7 @@ class JPEG2000SignatureBox(Jp2kBox):
def write(self, fptr):
"""Write a JPEG 2000 Signature box to file.
"""
fptr.write(struct.pack('>I', 12))
fptr.write(b'jP ')
fptr.write(struct.pack('>I4s', 12, b'jP '))
fptr.write(struct.pack('>BBBB', *self.signature))
@classmethod
@ -2578,8 +2569,7 @@ class LabelBox(Jp2kBox):
"""Write a Label box to file.
"""
length = 8 + len(self.label.encode())
fptr.write(struct.pack('>I', length))
fptr.write(b'lbl ')
fptr.write(struct.pack('>I4s', length, b'lbl '))
fptr.write(self.label.encode())
@classmethod
@ -2679,8 +2669,7 @@ class NumberListBox(Jp2kBox):
def write(self, fptr):
"""Write a NumberList box to file.
"""
fptr.write(struct.pack('>I', len(self.associations) * 4 + 8))
fptr.write(b'nlst')
fptr.write(struct.pack('>I4s', len(self.associations) * 4 + 8, b'nlst'))
fmt = '>' + 'I' * len(self.associations)
write_buffer = struct.pack(fmt, *self.associations)
@ -2753,8 +2742,7 @@ class XMLBox(Jp2kBox):
# AssertionError on 2.6
read_buffer = ET.tostring(self.xml.getroot(), encoding='utf-8')
fptr.write(struct.pack('>I', len(read_buffer) + 8))
fptr.write(b'xml ')
fptr.write(struct.pack('>I4s', len(read_buffer) + 8, b'xml '))
fptr.write(read_buffer)
@classmethod