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Update mobi docs.
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John Schember
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405ba87f8e
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@ -210,21 +210,23 @@ record type usual length name comments
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114 versionnumber
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115 sample
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116 startreading
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118 retail price (as text)
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119 retail price currency (as text)
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201 coveroffset
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202 thumboffset
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117 3 adult Mobipocket Creator adds this if Adult only is checked; contents: "yes"
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118 retail price As text, e.g. "4.99"
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119 retail price currency As text, e.g. "USD"
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201 4 coveroffset Add to first image field in Mobi Header to find PDB record containing the cover image
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202 4 thumboffset Add to first image field in Mobi Header to find PDB record containing the thumbnail cover image
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203 hasfakecover
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204 204 Unknown
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205 205 Unknown
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206 206 Unknown
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207 207 Unknown
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208 208 Unknown
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300 300 Unknown
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401 clippinglimit
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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.
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205 4 Creator Major Version
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206 4 Creator Minor Version
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207 4 Creator Build Number
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208 watermark
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209 tamper proof keys Used by the Kindle (and Android app) for generating book-specific PIDs.
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300 fontsignature
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401 1 clippinglimit
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402 publisherlimit
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403 403 Unknown
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404 404 ttsflag
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404 1 404 ttsflag
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501 4 cdetype PDOC - Personal Doc;
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EBOK - ebook;
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502 lastupdatetime
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@ -287,7 +289,7 @@ content at the beginning of the following record. The trailing entry ends with
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a byte containing a count of the overlapping bytes plus additional flags.
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offset bytes content comments
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0 0-3 N terminal bytes
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0 0-3 N terminal bytes
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of a multibyte
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character
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N 1 Size & flags bits 1-2 encode N, use of bits 3-8 is unknown
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@ -328,6 +330,102 @@ programs may ignore them entirely. They are stored at the end of the file itself
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so the full file needs to be scanned when loaded to find them.
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Image Records
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-------------
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If the file contains images, they follow the text blocks, with each image using a
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single block. The 4096-byte record size in the PalmDoc header applies only to
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text records; image records may be larger.
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Magic Records
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-------------
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In some cases, MobiPocket Creator adds a 2-zero-byte record after the text
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records in a file. This record is not included in the "record count" of text
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records in the PalmDoc header, and is also not used as the "first non-book
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index" in the MOBI header. (If the 2-zero-byte record is present, the index of
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the following block is used as the "first non-book index".)
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MobiPocket Creator also ends files with three records: 'FLIS', 'FCIS', and
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'end-of-file', in that order. The 'FLIS' and 'FCIS' records do not seem to be
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necessary for MobiPocket Reader or the Amazon Kindle 2 to read the file. The
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'end-of-file' record might be necessary.
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FLIS Record
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-----------
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The FLIS record appears to have a fixed value. The meaning of the values is not known.
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offset bytes content comments
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0 4 identifier the characters F L I S (0x46 0x4c 0x49 0x53)
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4 4 ? fixed value: 8
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8 2 ? fixed value: 65
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10 2 ? fixed value: 0
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12 4 ? fixed value: 0
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16 4 ? fixed value: -1
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20 2 ? fixed value: 1
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22 2 ? fixed value: 3
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24 4 ? fixed value: 3
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28 4 ? fixed value: 1
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32 4 ? fixed value: -1
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FCIS Record
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-----------
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The FCIS record appears to have mostly fixed values.
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offset bytes content comments
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0 4 identifier the characters F C I S (0x46 0x43 0x49 0x53)
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4 4 ? fixed value: 20
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8 4 ? fixed value: 16
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12 4 ? fixed value: 1
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16 4 ? fixed value: 0
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20 4 ? text length (the same value as "text length" in the PalmDoc header)
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24 4 ? fixed value: 0
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28 4 ? fixed value: 32
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32 4 ? fixed value: 8
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36 2 ? fixed value: 1
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38 2 ? fixed value: 1
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40 4 ? fixed value: 0
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End-of-file Record
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------------------
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The end-of-file record is a fixed 4-byte record. While the last two bytes
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appear to be a CRLF marker, the meaning of the first two bytes is unknown.
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offset bytes content comments
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0 1 ? fixed value: 233 (0xe9)
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1 1 ? fixed value: 142 (0x8e)
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2 1 ? fixed value: 13 (0x0d)
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3 1 ? fixed value: 10 (0x0a)
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SRCS Record
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-----------
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kindlegen creates a record whose content is a zip archive of all source files
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(i.e., .opf, .ncx, .htm, .jpg, ...) given to the command and puts it in the
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generated MOBI file. The record begins with the "SRCS" signature and is
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located just before the #End-of-file Record.
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MOBI files created with Mobipocket creator, Amazon's Personal Document Service,
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or Kindle Direct Publishing (former Amazon DTP) don't include SRCS record.
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In a past, kindlegen had an undocumented option to suppress this record, but
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the option was removed in 2010.
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offset bytes content comments
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0 4 identifier "SRCS" (0x53 0x52 0x43 0x53)
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4 4 ? fixed value(?): 0x00000010
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8 4 ? fixed value(?): 0x0000002f
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12 4 ? fixed value(?): 0x00000001
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16 zip The zip archive continues to the end of this record
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MBP
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---
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