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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - module-http-protocol-tcp: add send buffer size argument"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98368">98368</a>
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<th>Summary</th>
<td>module-http-protocol-tcp: add send buffer size argument
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<th>Product</th>
<td>PulseAudio
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>modules
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<th>Assignee</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>ewtoombs@uwaterloo.ca
</td>
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<th>QA Contact</th>
<td>pulseaudio-bugs@lists.freedesktop.org
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<th>CC</th>
<td>lennart@poettering.net
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<p>
<div>
<pre>Streaming audio from streams provided by module-http-protocol-tcp is often
impossible over wifi for reasons having nothing to do with sustained connection
speed.
Over wired ethernet,
$ wget -O -
<a href="http://server:4714/listen/source/alsa_output.pci-0000_00_07.0.analog-stereo.monitor">http://server:4714/listen/source/alsa_output.pci-0000_00_07.0.analog-stereo.monitor</a>
<span class="quote">>/dev/null</span >
goes at around 180KiB/s, so that's the speed it needs to go at to sustain the
stream. When I do the same thing over wifi, I only get a speed of around
100KiB/s—not fast enough. I tested this same wifi connection using an HTTP
stream between the same two hosts and got a sustained speed well in excess of
1.5MiB/s, so the wifi is plenty fast enough.
It must be some kind of queueing problem on the pulseaudio server end—probably
send buffer overflows. For instance, I can stream reliably with the following
command run on the remote client:
$ ssh server wget -q -O -
<a href="http://localhost:4714/listen/source/alsa_output.pci-0000_00_07.0.analog-stereo.monitor">http://localhost:4714/listen/source/alsa_output.pci-0000_00_07.0.analog-stereo.monitor</a>
|aplay -f s16_be -c 2 -r 44100
I'd like the option of increasing the size of this sending buffer, so that I do
the same streaming without having to tunnel through ssh. I don't really care
how much of an audio delay this incurs, since synchronisation isn't an issue.
Even if it were, I'd be OK with adding a corresponding delay to the local audio
output to maintain synchronisation. Something like this:
$ pactl load-module module-http-protocol-tcp send-buffer-time=500ms</pre>
</div>
</p>
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