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Tweaks to the header

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This commit is contained in:
Kovid Goyal 2012-04-22 22:37:28 +05:30
parent d6c7ce3d7d
commit 03a6e4ad62
1 changed files with 22 additions and 20 deletions
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42
src/calibre/ebooks/mobi/writer8/mobi.py
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@ -43,7 +43,10 @@ class MOBIHeader(Header): # {{{
# 10: Text record size
record_size = {record_size}
# 12: Unused
# 12: Encryption Type
encryption_type
# 14: Unused
unused2
# 16: Ident
@ -65,8 +68,8 @@ class MOBIHeader(Header): # {{{
# 36: File version
file_version = {file_version}
# 40: Meta orth record (Chunk table index in KF8)
meta_orth_record = DYN
# 40: Meta orth record (used in dictionaries)
meta_orth_record = NULL
# 44: Meta infl index
meta_infl_index = NULL
@ -107,24 +110,23 @@ class MOBIHeader(Header): # {{{
huff_first_record
huff_count
# 120: DATP records
datp_first_record
datp_count
# 120: Unknown (Maybe DATP related, maybe HUFF/CDIC related)
maybe_datp = zeroes(8)
# 128: EXTH flags
exth_flags = DYN
# 132: Unknown
unknown = zeroes(32)
unknown = zeroes(36)
# 164: DRM
drm_offset = NULL
drm_count = NULL
# 168: DRM
drm_offset
drm_count
drm_size
drm_flags
# 180: Unknown
unknown2 = zeroes(12)
# 184: Unknown
unknown2 = zeroes(8)
# 192: FDST
fdst_record = DYN
@ -171,7 +173,8 @@ class MOBIHeader(Header): # {{{
padding = zeroes(8192)
'''.format(record_size=RECORD_SIZE, file_version=FILE_VERSION)
SHORT_FIELDS = {'compression', 'last_text_record', 'record_size'}
SHORT_FIELDS = {'compression', 'last_text_record', 'record_size',
'encryption_type', 'unused2'}
ALIGN = True
POSITIONS = {'title_offset':'full_title'}
@ -198,7 +201,7 @@ class KF8Book(object):
self.text_length = writer.text_length
# KF8 Indices
self.chunk_index = self.meta_orth_record = len(self.records)
self.chunk_index = len(self.records)
self.records.extend(writer.chunk_records)
self.skel_index = len(self.records)
self.records.extend(writer.skel_records)
@ -264,12 +267,11 @@ class KF8Book(object):
start_offset=self.start_offset, mobi_doctype=self.book_type)
kwargs = {field:getattr(self, field) for field in
('compression', 'text_length', 'last_text_record',
'book_type', 'meta_orth_record', 'first_non_text_record',
'title_length', 'language_code', 'first_resource_record',
'exth_flags', 'fdst_record', 'fdst_count', 'ncx_index',
'chunk_index', 'skel_index', 'guide_index', 'exth',
'full_title')}
('compression', 'text_length', 'last_text_record', 'book_type',
'first_non_text_record', 'title_length', 'language_code',
'first_resource_record', 'exth_flags', 'fdst_record',
'fdst_count', 'ncx_index', 'chunk_index', 'skel_index',
'guide_index', 'exth', 'full_title')}
return MOBIHeader()(**kwargs)
def write(self, outpath):