waitcondition timeout too long for short samples

[Harald Sitter]

[Impact]
pairs uses *one* mediaobject to play multiple sounds from a qbuffer. To achieve sane results it only calls setCurrentSource iff the mediaobject is not in playing state. Iff it is in playing state a one-source-queue is maintained, so that only the most recent sound would be played after the present one.
Assuming on second length of the sound what happens is that phonon starts playing, then immediately gets the callback to queue a new track. It emits the queued signal and locks for 3 seconds. So, for a period of <=4 && >=3 seconds the MO is in playing state but not actually playing anything.
During this period pairs will enqueue tracks but they will not be played. This ultimately results in sounds being dropped.

This is resolved by using a dynamic timeout rather than a fixed seconds amount. The timeout now depends on how much time is remaining in the present playback thus prevent the pipeline to be locked for longer than what it has buffers to play.

[Test Case]
Play pairs.

[Regression Potential]
None.

[Scott Kitterman (kitterman)]

Hello Harald, or anyone else affected,

Accepted into quantal-proposed. The package will build now and be available in a few hours in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Ubuntu Foundations Team Bug Bot (crichton)]

The fix for this bug has been awaiting testing feedback in the -proposed repository for precise for more than 90 days. Please test this fix and update the bug appropriately with the results. In the event that the fix for this bug is still not verified 15 days from now, the package will be removed from the -proposed repository.