[pulseaudio-tickets] [PulseAudio] #247: OSS4 is incompatible with module-oss, due to some subtle API changes to OSS3

[PulseAudio]

#247: OSS4 is incompatible with module-oss, due to some subtle API changes to
OSS3
---------------------------+------------------------------------------------
  Reporter:  yarrow        |       Owner:  lennart 
      Type:  defect        |      Status:  reopened
  Priority:  normal        |   Milestone:          
 Component:  module-oss-*  |    Severity:  major   
Resolution:                |    Keywords:          
---------------------------+------------------------------------------------
Changes (by lennart):

  * summary:  module-oss fails to load. => OSS4 is incompatible with
              module-oss, due to some subtle API changes to
              OSS3

Comment:

 Replying to [comment:7 Saoshyant]:
 > Replying to [comment:6 lennart]:
 > > As mentioned the problem is that OSS4 signals some POLLxxx constant on
 poll() which normal OSS doesn't do. They broke compatibility.
 >
 > OSS4 is not completely backwards-compatible with OSS3.  There's good
 reasons why this is so.  I'm afraid this will be something that pulseaudio
 will have to deal with, forcing a distinction between OSS3/Free and OSS4
 to be necessary.

 Yes, as I said, ALSA's compat with OSS is better than OSS4's.

 The OSS4 docs don't contain any information about the meaning of the
 additional POLLxx codes. The current code assumes that they signal some
 kind of error (usb audio device unplug and suchlike), which is the reason
 we react on those codes as we do.

 If you want me to help you, try to figure out what those codes mean. I am
 not really interested in investing my own time in figuring in which way
 exactly OSS4 differs from OSS.

 Or take it the other way: PA supports most things that are OSS3-compatible
 just fine. If you want it to support OSS4 too, then *you* have to supply
 the necessary information.

-- 
Ticket URL: <http://www.pulseaudio.org/ticket/247#comment:8>
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