Cutlery/calibre
1
0
Fork 0
mirror of https://github.com/kovidgoyal/calibre.git synced 2025-07-09 03:04:10 -04:00
Code Issues Packages Projects Releases Wiki Activity

Update mobi docs.

Browse Source
This commit is contained in:
John Schember 2011-03-26 21:58:57 -04:00
parent 405ba87f8e
commit a929a0ff9f
1 changed files with 112 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

124
format_docs/pdb/mobi.txt
View File

@ -210,21 +210,23 @@ record type usual length name comments
114 versionnumber 114 versionnumber
115 sample 115 sample
116 startreading 116 startreading
118 retail price (as text) 117 3 adult Mobipocket Creator adds this if Adult only is checked; contents: "yes"
119 retail price currency (as text) 118 retail price As text, e.g. "4.99"
201 coveroffset 119 retail price currency As text, e.g. "USD"
202 thumboffset 201 4 coveroffset Add to first image field in Mobi Header to find PDB record containing the cover image
202 4 thumboffset Add to first image field in Mobi Header to find PDB record containing the thumbnail cover image
203 hasfakecover 203 hasfakecover
204 204 Unknown 204 4 Creator Software Records 204-207 are usually the same for all books from a certain source, e.g. 1-6-2-41 for Baen and 201-1-0-85 for project gutenberg, 200-1-0-85 for amazon when converted to a 32 bit integer.
205 205 Unknown 205 4 Creator Major Version
206 206 Unknown 206 4 Creator Minor Version
207 207 Unknown 207 4 Creator Build Number
208 208 Unknown 208 watermark
300 300 Unknown 209 tamper proof keys Used by the Kindle (and Android app) for generating book-specific PIDs.
401 clippinglimit 300 fontsignature
401 1 clippinglimit
402 publisherlimit 402 publisherlimit
403 403 Unknown 403 403 Unknown
404 404 ttsflag 404 1 404 ttsflag
501 4 cdetype PDOC - Personal Doc; 501 4 cdetype PDOC - Personal Doc;
EBOK - ebook; EBOK - ebook;
502 lastupdatetime 502 lastupdatetime
@ -287,7 +289,7 @@ content at the beginning of the following record. The trailing entry ends with
a byte containing a count of the overlapping bytes plus additional flags. a byte containing a count of the overlapping bytes plus additional flags.
offset bytes content comments offset bytes content comments
0 0-3 N terminal bytes 0 0-3 N terminal bytes
of a multibyte of a multibyte
character character
N 1 Size & flags bits 1-2 encode N, use of bits 3-8 is unknown N 1 Size & flags bits 1-2 encode N, use of bits 3-8 is unknown
@ -328,6 +330,102 @@ programs may ignore them entirely. They are stored at the end of the file itself
so the full file needs to be scanned when loaded to find them. so the full file needs to be scanned when loaded to find them.
Image Records
-------------
If the file contains images, they follow the text blocks, with each image using a
single block. The 4096-byte record size in the PalmDoc header applies only to
text records; image records may be larger.
Magic Records
-------------
In some cases, MobiPocket Creator adds a 2-zero-byte record after the text
records in a file. This record is not included in the "record count" of text
records in the PalmDoc header, and is also not used as the "first non-book
index" in the MOBI header. (If the 2-zero-byte record is present, the index of
the following block is used as the "first non-book index".)
MobiPocket Creator also ends files with three records: 'FLIS', 'FCIS', and
'end-of-file', in that order. The 'FLIS' and 'FCIS' records do not seem to be
necessary for MobiPocket Reader or the Amazon Kindle 2 to read the file. The
'end-of-file' record might be necessary.
FLIS Record
-----------
The FLIS record appears to have a fixed value. The meaning of the values is not known.
offset bytes content comments
0 4 identifier the characters F L I S (0x46 0x4c 0x49 0x53)
4 4 ? fixed value: 8
8 2 ? fixed value: 65
10 2 ? fixed value: 0
12 4 ? fixed value: 0
16 4 ? fixed value: -1
20 2 ? fixed value: 1
22 2 ? fixed value: 3
24 4 ? fixed value: 3
28 4 ? fixed value: 1
32 4 ? fixed value: -1
FCIS Record
-----------
The FCIS record appears to have mostly fixed values.
offset bytes content comments
0 4 identifier the characters F C I S (0x46 0x43 0x49 0x53)
4 4 ? fixed value: 20
8 4 ? fixed value: 16
12 4 ? fixed value: 1
16 4 ? fixed value: 0
20 4 ? text length (the same value as "text length" in the PalmDoc header)
24 4 ? fixed value: 0
28 4 ? fixed value: 32
32 4 ? fixed value: 8
36 2 ? fixed value: 1
38 2 ? fixed value: 1
40 4 ? fixed value: 0
End-of-file Record
------------------
The end-of-file record is a fixed 4-byte record. While the last two bytes
appear to be a CRLF marker, the meaning of the first two bytes is unknown.
offset bytes content comments
0 1 ? fixed value: 233 (0xe9)
1 1 ? fixed value: 142 (0x8e)
2 1 ? fixed value: 13 (0x0d)
3 1 ? fixed value: 10 (0x0a)
SRCS Record
-----------
kindlegen creates a record whose content is a zip archive of all source files
(i.e., .opf, .ncx, .htm, .jpg, ...) given to the command and puts it in the
generated MOBI file. The record begins with the "SRCS" signature and is
located just before the #End-of-file Record.
MOBI files created with Mobipocket creator, Amazon's Personal Document Service,
or Kindle Direct Publishing (former Amazon DTP) don't include SRCS record.
In a past, kindlegen had an undocumented option to suppress this record, but
the option was removed in 2010.
offset bytes content comments
0 4 identifier "SRCS" (0x53 0x52 0x43 0x53)
4 4 ? fixed value(?): 0x00000010
8 4 ? fixed value(?): 0x0000002f
12 4 ? fixed value(?): 0x00000001
16 zip The zip archive continues to the end of this record
MBP MBP
--- ---