Kamaelia.NullPayloadRTP.NullPayloadPreFramer

class NullPayloadPreFramer(Axon.Component.component)

Inboxes:

control -> File select, file read control, framing control recvsrc -> Block/Chunks of raw disk data

Outboxes:

activatesrc -> Control messages to the file reading subsystem output -> The framed data, payload ready

Inboxes

• control : Code uses old style inbox/outbox description - no metadata available
• recvsrc : Code uses old style inbox/outbox description - no metadata available

Outboxes

• output : Code uses old style inbox/outbox description - no metadata available

Methods defined here

__init__(self, sourcename, sourcebitrate, chunksize)

• Name of source - at __init__

  • Data Rate - at __init__
  • Chunksize - at __init__

closeDownComponent(self)

No closedown/shutdown code

handleControl(self)

returns quit flag - True means quit

handleShutdown(self)

initialiseComponent(self)

No initialisation

mainBody(self)

Loopbody:

makeChunk(self, datatosend)

C.makeChunk(datatosend) -> chunk : network ready data

sendCurrentChunk(self, sendpartial)

• grab first (current chunk size) bytes

  • frame chunk
  • send chunk

updateTimestamp(self, datatosend)

C.updateTimestamp(datatosend)

self.timestamp stores the timestamp of the end of the most recently transmitted data, whenever we send some data this timestamp needs to be updated. This method represents the calculation involved. (calculate the time period the data covers, and increment the timestamp)

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