[rtmpdump] [PATCH] Callback API

[Antti Ajanki]

The attached patch adds a callback interface for overriding (parts of) 
the RTMP packet processing. This is based on Chris Larsen's and Adam 
Malcontenti-Wilson's patches from last Fall.

This is useful for implementing custom CDN authentication. My other 
motivation is implementing remote procedure calls over RTMP in the open 
source Flash player Lightspark, where a callback could be used to 
capture incoming RPC packets and execute the corresponding functions on 
Lightspark's virtual machine.

The patch actually adds different callbacks on various levels of 
generality. RTMP_CALLBACK_PACKET callbacks can be used to completely 
override RTMP packet handling. Then there are more restricted callbacks, 
which only apply to some particular types of packets but, on the other 
hand, avoid much of the RTMP body parsing because that can be left to 
librtmp. See the comments in rtmp.h for details on different types of 
callbacks.

Antti

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