[Live-devel] Control Flow Basics

[Ross Finlayson]

>So, what is confusing to me is that in the first question, data 
>flows from source to sink (which is what I would expect), yet the 
>second question suggests that data is transmitted by a sink and 
>received by a source (which is counterintuitive).

Jeff,

Note the last paragraph in 
http://www.live555.com/liveMedia/faq.html#control-flow :
"Note that the flow of data from 'sources' to 'sinks' happens within 
each application, and doesn't necessarily correspond to the sending 
or receiving of network packets. For example, a server application 
(such as "testMP3Streamer") that sends RTP packets will do so using 
one or more "RTPSink" modules. These "RTPSink" modules receive data 
from other, "*Source" modules (e.g., to read data from a file), and, 
as a side effect, transmit RTP packets. "

For streaming H.164 video, see 
http://www.live555.com/liveMedia/faq.html#h264-streaming
You will need to write a 'source' class (i.e., a subclass of 
"FramedSource") that encapsulates your source of  H.264 NAL units. 
You will then feed this into a subclass of "H264VideoStreamFramer" - 
that you will write.  (In particular, this subclass must implement 
the "doGetNextFrame()" and "currentNALUnitEndsAccessUnit() " virtual 
functions.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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