[pulseaudio-tickets] [PulseAudio] #897: include vumeter samples in the remote protocol

[PulseAudio]

#897: include vumeter samples in the remote protocol
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  Reporter:  brian        |       Owner:  lennart
      Type:  enhancement  |      Status:  new    
 Milestone:               |   Component:  daemon 
Resolution:               |    Keywords:         
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Comment(by tanuk):

 Replying to [comment:3 coling]:
 > I could also do some stuff in PA to really cut down on the use of the
 monitor streams - At present there are four tabs which show VU meters, but
 you can only see one at a time. Therefore we can easily "cork" the streams
 that are not visible. This will cut down on the amount of traffic it
 subsequently generates. Also, as tunnels are involved here, even if the
 PEAK_DETECT flag is used, the tunnel itself still uses a fixed rate. The
 actual tunnel is opaque to pavucontrol - it's just another sink. Therefore
 the problem is that we request the data from the Tunnel Sink at the lower
 25Hz rate, but for that Tinnel Sink to get the data it has to transfer it
 over the wire at the rate the tunnel operates (i.e. 44.1kHz) and then down
 sample it to 25kHz to feed it to our peak detector... obviously this is
 suboptimal but that really need to be worked on in the Tunnel Sink
 implementation - perhaps add the ability to send different data rates at
 the same time or to allow for dynamic switching of sample rates in a
 tunnel.

 Replace "sink" with "source" in the quoted text, and it starts to make
 sense.

 If we are talking about tunnel sinks, there the only problem appears to be
 that the tunnel sink doesn't understand to stop all processing and go to
 the idle mode when only peak detection streams are connected to its
 monitor source.

 For reducing the network load for tunnel sources caused by pavucontrol,
 here's another idea, I'm not saying that it's a good idea, but an idea
 anyway: don't show vumeters at all for network devices, or enable them
 only at user request.

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Ticket URL: <http://pulseaudio.org/ticket/897#comment:5>
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