On Thu, Jun 21, 2012 at 6:43 AM, Nigel Orr <nigel....@nautronix.co.uk>wrote:
> > I am working on a gnuradio application which takes feeds from other > sources over Ethernet. There is a possibility that the source will be > disconnected occasionally due to intermittent network failures, when > that happens I'd like the audio to go silent, and come back when the > source is reconnected. In short, I'd like it to behave like an analogue > audio connection :-) UDP looks like the closest option to that, so > that's what I've tried so far. > > I currently connect the UDP blocks with something like > udp_in = gr.udp_source((gr.sizeof_float*1), "0.0.0.0", 1234, 1472, True, > True) > and then connect them into the flowgraph. > > I have tried various options (all 4!) of the Boolean settings for Wait > for data and empty packet = EOF, but it doesn't seem to do what I need. > At best (with the above settings), the flowgraph pauses when the UDP is > disconnected, so all the local sources which are still connected buffer > up, resulting in long delays when the UDP comes back. > > Is it possible to get 'analogue-like' performance from a network socket > connection, if so how should I do that within gnuradio? Is there > something clever I can do with Throttle or Valve or something which will > decouple loss of a UDP audio stream from the rest of the flowgraph? > > Thanks, > > Nigel > Hi Nigel, Sorry for taking so long and then giving you this response. I really don't have any good ideas to tell you for your problem. There's probably not a good way to do it currently, so you might need to roll your own implementation of the UDP source block that performs like you want it to. Tom
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