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Allow headers to be repeated anywhere 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17548 b3059339-0415-0410-9bf9-f77b7e298cf2
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ods15 2006-02-07 04:03:11 +00:00
parent fa6ba9c127
commit e6611b7251
1 changed files with 7 additions and 2 deletions
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9
DOCS/tech/mpcf.txt
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@ -1,5 +1,5 @@
========================================
NUT Open Container Format DRAFT 20060203
NUT Open Container Format DRAFT 20060207
========================================
@ -680,10 +680,15 @@ stream_header (id=n)
headers may be repeated, but if they are, then they MUST all be repeated
together and repeated headers MUST be identical
headers MAY only repeat at the closest possible positions after 2^x where x is
Each set of repeated headers not at the beginning or end of the file SHOULD
be stored at the earliest possible position after 2^x where x is
an integer and the file end, so the headers may be repeated at 4102 if that is
the closest position after 2^12=4096 at which the headers can be placed
Note: this allows an implementation reading the file to locate backup
headers in O(log filesize) time as opposed to O(filesize)
headers MUST be placed at least at the start of the file and immediately before
the index or at the file end if there is no index
headers MUST be repeated at least twice (so they exist three times in a file)