[pulseaudio-tickets] [PulseAudio] #829: Default pulseaudio resampler (speex-float-3) sometimes too expensive?

[PulseAudio]

#829: Default pulseaudio resampler (speex-float-3) sometimes too expensive?
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 Reporter:  sitsofe  |       Owner:  lennart
     Type:  defect   |      Status:  new    
Milestone:           |   Component:  daemon 
 Keywords:           |  
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 Description of the problem:[[BR]]
 Sometimes the default resampler is so expensive it causes pulseaudio to be
 killed off. By default a cheaper resampler (speex-float-2) could be used
 to prevent somewhat fast machines running into this issue.

 Steps to reproduce:[[BR]]
 1. Download http://samples.mplayerhq.hu/A-codecs/wavpcm/8_Channel_ID.wav
 .[[BR]]
 2. Run
 gst-launch-0.10 filesrc location=8_Channel_ID.wav ! decodebin  !
 audioconvert ! audioresample ! pulsesink

 Expected result:[[BR]]
 To hear someone speaking out of the stereo laptop speakers.

 Actual result:[[BR]]
 If pulse is running with realtime permissions nothing is heard on a on a
 laptop with two 1.83GHz CPUs running Fedora 13. A laptop with a single
 900Mhz (so 0.9Ghz) CPU running Ubuntu 10.04 shows the same issue. If
 pulseaudio is running without realtime permissions it doesn't die but no
 sound is heard.

 How reproducible is the bug?[[BR]]
 It is reproducible every time.

 Additional information:[[BR]]
 Running[[BR]]
 gst-launch-0.10 filesrc location=8_Channel_ID.wav ! decodebin  !
 audioconvert ! audioresample ! audio/x-raw-int, rate=44100 !
 pulsesink[[BR]]
 works on both machines.

 Running[[BR]]
 echo "extra-arguments=--log-target=syslog --resample-method=ffmpeg" >>
 ~/.pulse/client.conf[[BR]]
 pulseaudio -k[[BR]]
 also resolves the problem on both machines.

 For pulseaudio to produce sound on the 1.83GHz machine speex-float-2 would
 probably have to be selected. For the 900Mhz machine to work speex-float-1
 sometimes works but sometimes fails. As the 900Mhz machine is quite slow
 by today's standards I would like to suggest speex-float-2 as the default
 resampling format.

 Bugs that might be related to this are
 https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/532586 (also see
 https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/532586/comments/22
 ) and https://bugzilla.redhat.com/show_bug.cgi?id=583785 (and the bug
 mentioned within).

 Version information:[[BR]]
 Fedora 13 x86_64[[BR]]
 Ubuntu 10.04 32bit

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Ticket URL: <http://pulseaudio.org/ticket/829>
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