[mythtv-commits] Ticket #7650: Use libmythui to draw the OSD

[MythTV]

#7650: Use libmythui to draw the OSD
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 Reporter:  markk                    |       Owner:  markk   
     Type:  task                     |      Status:  accepted
 Priority:  minor                    |   Milestone:  0.23    
Component:  MythTV - Video Playback  |     Version:  head    
 Severity:  medium                   |     Mlocked:  0       
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Comment(by markk):

 (In [23201]) Branch libmythui-osd: Convert the video playback thread to a
 QThread.

 Currently there is no Qt event loop running for the playback thread and
 hence all Qt deleteLater calls are 'lost', leading to substantial memory
 leaks from the new OSD code.

 By converting to a QThread and starting the event loop, objects are
 destroyed as expected. This is implemented with a zero timeout timer
 that will trigger immediately all events have been processed. Any
 performance impact should be minimal.

 N.B. This removes, for the time being at least, the OS X garbage
 collector. I'm not sure whether Qt handles this internally.

 N.B. This removes the code that requests realtime priority for the video
 playback thread. Following discussion on IRC, this may still be
 achievable while running in a QThread though the setting may no longer
 be widely used and/or of much utilty. The new QThread is allocated a
 priority of QThread::TimeCriticalPriority which may give the same
 results on certain platforms.

 Refs #7650.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/7650#comment:53>
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