Author: michael
Date: Tue Jan 30 01:47:28 2007
New Revision: 22069
Modified:
trunk/DOCS/tech/nut.txt
Log:
better back_ptr_div16 description by (Clemens Ladisch (((
cladisch ( fastmail (( net
Modified: trunk/DOCS/tech/nut.txt
============================================================
==================
--- trunk/DOCS/tech/nut.txt (original)
+++ trunk/DOCS/tech/nut.txt Tue Jan 30 01:47:28 2007
 -736,10
+736,11
back_ptr_div16 (v)
back_ptr = back_ptr_div16 * 16 + 15
- back_ptr must point to a position within 16 bytes of a
syncpoint
- startcode. This syncpoint MUST be the closest syncpoint
such that at
- least one keyframe with a pts lower or equal to the
original syncpoint's
- global_key_pts for all streams lies between it and the
current syncpoint.
+ back_ptr must point to a position up to 15 bytes before
a syncpoint
+ startcode. Relative to position of current syncpoint.
The syncpoint
+ pointed to MUST be the closest syncpoint such that at
least one keyframe
+ with a pts lower or equal to the current syncpoint's
global_key_pts for
+ all streams lies between it and the current syncpoint.
A stream where EOR is set is to be ignored for
back_ptr.
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