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some streamheader updates

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Original commit message from CVS:
some streamheader updates
This commit is contained in:
Thomas Vander Stichele 2006-05-14 21:16:50 +00:00
parent d619a982a8
commit c3de49400d
1 changed files with 9 additions and 2 deletions
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docs/random/streamheader
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@ -39,11 +39,18 @@ Rules for sending streamheaders:
- when all streamheader buffers are collected in the element, pad caps should - when all streamheader buffers are collected in the element, pad caps should
be set, including this streamheader be set, including this streamheader
- streamheader buffers should be sent consecutively, and before any of the - streamheader buffers should be sent consecutively, and before any of the
data (non-IN_CAPS) buffers they apply to. data (non-IN_CAPS) buffers they apply to. If necessary, the element
should internally queue non-IN_CAPS buffers until the streamheaders
are completely assembled.
- when new streamheader buffers need to be pushed out, this process is - when new streamheader buffers need to be pushed out, this process is
repeated. Receiving a new IN_CAPS buffer after a non-IN_CAPS buffer repeated. Receiving a new IN_CAPS buffer after a non-IN_CAPS buffer
signifies resetting streamheader, as does the new set_caps with different signifies resetting streamheader, as does the new set_caps with different
streamheader right before. streamheader right before. (FIXME: it's probably better to explicitly
have an event/buffer that clears streamheaders; consider the case of
an element like GDP that has created streamheader from the first newsegment
and the first caps, and then receives a new tag event that it also wants
to put on the streamheader - it should be able to invalidate the previous
ones)
Elements that can send streamheader caps: Elements that can send streamheader caps:
- vorbisenc - vorbisenc