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New mobi output: Make the MOBI header/extra records as similar to the output of kindlegen as possible

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Kovid Goyal 2011-07-26 21:23:56 -06:00
parent 8a0a978c52
commit 807b7069d7
2 changed files with 26 additions and 7 deletions
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2
src/calibre/ebooks/mobi/debug.py
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@ -345,7 +345,7 @@ class MOBIHeader(object): # {{{
ans.append('Huffman record offset: %d'%self.huffman_record_offset) ans.append('Huffman record offset: %d'%self.huffman_record_offset)
ans.append('Huffman record count: %d'%self.huffman_record_count) ans.append('Huffman record count: %d'%self.huffman_record_count)
ans.append('Unknown2: %r'%self.unknown2) ans.append('Unknown2: %r'%self.unknown2)
ans.append('EXTH flags: %r (%s)'%(self.exth_flags, self.has_exth)) ans.append('EXTH flags: %s (%s)'%(bin(self.exth_flags)[2:], self.has_exth))
if self.has_drm_data: if self.has_drm_data:
ans.append('Unknown3: %r'%self.unknown3) ans.append('Unknown3: %r'%self.unknown3)
ans.append('DRM Offset: %s'%self.drm_offset) ans.append('DRM Offset: %s'%self.drm_offset)

31
src/calibre/ebooks/mobi/writer2/main.py
View File

@ -102,6 +102,10 @@ class MobiWriter(object):
self.records[i] += tbs self.records[i] += tbs
self.records.extend(self.indexer.records) self.records.extend(self.indexer.records)
@property
def is_periodical(self):
return (self.primary_index_record_idx is None or not
self.indexer.is_periodical)
# }}} # }}}
@ -277,6 +281,17 @@ class MobiWriter(object):
exth = self.build_exth() exth = self.build_exth()
last_content_record = len(self.records) - 1 last_content_record = len(self.records) - 1
# FCIS/FLIS (Seem to server no purpose)
flis_number = len(self.records)
self.records.append(
b'FLIS\0\0\0\x08\0\x41\0\0\0\0\0\0\xff\xff\xff\xff\0\x01\0\x03\0\0\0\x03\0\0\0\x01'+
b'\xff'*4)
fcis = b'FCIS\x00\x00\x00\x14\x00\x00\x00\x10\x00\x00\x00\x01\x00\x00\x00\x00'
fcis += pack(b'>I', self.text_length)
fcis += b'\x00\x00\x00\x00\x00\x00\x00\x20\x00\x00\x00\x08\x00\x01\x00\x01\x00\x00\x00\x00'
fcis_number = len(self.records)
self.records.append(fcis)
# EOF record # EOF record
self.records.append(b'\xE9\x8E\x0D\x0A') self.records.append(b'\xE9\x8E\x0D\x0A')
@ -355,7 +370,12 @@ class MobiWriter(object):
record0.write(b'\0' * 16) record0.write(b'\0' * 16)
# 0x70 - 0x73 : EXTH flags # 0x70 - 0x73 : EXTH flags
record0.write(pack(b'>I', 0x50)) # Bit 6 (0b1000000) being set indicates the presence of an EXTH header
# The purpose of the other bits is unknown
exth_flags = 0b1011000
if self.is_periodical:
exth_flags |= 0b1000
record0.write(pack(b'>I', exth_flags))
# 0x74 - 0x93 : Unknown # 0x74 - 0x93 : Unknown
record0.write(b'\0' * 32) record0.write(b'\0' * 32)
@ -380,13 +400,13 @@ class MobiWriter(object):
record0.write(b'\0\0\0\x01') record0.write(b'\0\0\0\x01')
# 0xb8 - 0xbb : FCIS record number # 0xb8 - 0xbb : FCIS record number
record0.write(pack(b'>I', 0xffffffff)) record0.write(pack(b'>I', fcis_number))
# 0xbc - 0xbf : Unknown (FCIS record count?) # 0xbc - 0xbf : Unknown (FCIS record count?)
record0.write(pack(b'>I', 0xffffffff)) record0.write(pack(b'>I', 1))
# 0xc0 - 0xc3 : FLIS record number # 0xc0 - 0xc3 : FLIS record number
record0.write(pack(b'>I', 0xffffffff)) record0.write(pack(b'>I', flis_number))
# 0xc4 - 0xc7 : Unknown (FLIS record count?) # 0xc4 - 0xc7 : Unknown (FLIS record count?)
record0.write(pack(b'>I', 1)) record0.write(pack(b'>I', 1))
@ -478,8 +498,7 @@ class MobiWriter(object):
nrecs += 1 nrecs += 1
# Write cdetype # Write cdetype
if (self.primary_index_record_idx is None or not if self.is_periodical:
self.indexer.is_periodical):
data = b'EBOK' data = b'EBOK'
exth.write(pack(b'>II', 501, len(data)+8)) exth.write(pack(b'>II', 501, len(data)+8))
exth.write(data) exth.write(data)