#1387 HIGH Trial-2: Rotating screen with video running hangs entire system

[Zarro Boogs per Child]

#1387: Rotating screen with video running hangs entire system
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  Reporter:  gnu              |       Owner:  JordanCrouse
      Type:  defect           |      Status:  new         
  Priority:  high             |   Milestone:  Trial-2     
 Component:  x window system  |     Version:              
Resolution:                   |    Keywords:              
  Verified:  0                |  
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Comment (by JordanCrouse):

 The supereasybonusfix is to just return "Success" in XvPutImage when we
 are rotated - this will prevent failures - but note that it won't prevent
 the camera app from drawing its pretty pink window patiently expecting
 some video to appear there.  A small price to pay for not dying horribly.

 The scaryhorribleohgodithurts! fix is to actually rotate the video.  There
 be dragons here.  The best way I can think to do it is to use two
 offscreen video buffers - in stage 1, we copy the YUV data to video space,
 and in stage 2 we rotate the data (and not screw up the YUV data in the
 process), and adjust the coordinates accordingly.  And by the last item, I
 mean figuring out the proper scaling for the rotated mode, adjusting the
 Y,U, and V offsets, and hoping that we get it all right.  All this and not
 regressing on the regular mode too.

 So the question is - how important is rotated video?  Can we win without
 it?  If the answer is yes, then I say we go with the easy fix, and make
 sure the camera app does the right thing.

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Ticket URL: <http://dev.laptop.org/ticket/1387#comment:10>
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