Project Task Page: PyMedia Audio, Pygame and misc bugfixes

Description

Bugfixes to fix following:

• Kamaelia.Audio.PyMedia.Input - not working under win32 (noSpaceInBox exceptions) (see mailing list)
  
• Kamaelia.UI.Pygame.Display - not working under win32 and MacOSX (freezes/unresponsive to keyboard/mouse interaction) (see IRC logs)
  
• Kamaelia.Util.Chooser - not quiescent
• Kamaelia example "Show.py" raises exception on startup: (see IRC logs)

Inputs

Task Sponsor: MH

Task Owner: MH

Developers: MH, MS

Users: MH, _eris (IRC), David Montgomery

Interested third parties: MS

Requirements

• MUST fix the bugs so the problem doesn't occur
• SHOULD not result in any foreseeable regressions
  

Outputs

Expected

Modifications to:

• /Code/Python/Kamaelia/Kamaelia/UI/Pygame/Display.py
• /Code/Python/Kamaelia/Kamaelia/Audio/PyMedia/Input.py
• /Code/Python/Kamaelia/Kamaelia/Util/Chooser.py
• /Code/Python/Kamaelia/Kamaelia/Tools/Show.py

Actual

Branch /branches/private_MH_20070423_kamaelia_bugfixes/

...containing modifications to:

• /Code/Python/Kamaelia/Kamaelia/Audio/Input/PyMedia/Input.py
• /Code/Python/Kamaelia/Kamaelia/UI/Pygame/Display.py
• /Code/Python/Kamaelia/Kamaelia/Util/Chooser.py
  
• /Code/Python/Kamaelia/Tools/Show/GraphSlides.py
• /Code/Python/Kamaelia/Kamaelia/Support/Data/Experimental.py

... which were merged into /trunk

Realistic possibilities arising as a result of activity on this task

none

Related Tasks

Tasks that directly enable this task (dependencies)

none

Sub Tasks

• Branch containing modifications
• Merge of branch

Task Log

• 2007 04 22 : Task status changed to running
• 2007 04 22 : Added developer MH
• 2007 04 22 : Fixed PyMedia Input code in private Sketches area. Tested by MH under win32.
  
• 2007 04 23 : Created branch /branches/private_MH_20070423_kamaelia_bugfixes/
• 2007 04 23 : Fixed PyGame Display bug. Verified working on win32 by MH and MacOSX by eris_
• 2007 04 23 : Imported fixed PyMedia Input code from Sketches
• 2007 04 23 : Fixed quiescence in Chooser - tested by MH in Show.py tool
  
• 2007 04 25 : Time spent 1.5 days
• 2007 04 22 : Task status changed to stasis - waiting for test feedback from David Montgomery
• 2007 04 27 : Removed developer MH
• 2007 04 27 : Added developer MS
• 2007 04 27 : Task status changed to running - decided to proceed anyway (MH has already tested on win32)
• 2007 04 27 : Branch merged
• 2007 04 27 : Task status changed to completed
• 2007 04 27 : Time spend 0.5 days
  

Discussion

Note this branch was renamed (logged by svn as a copy operation). The original branch point is revision r2887. The renaming occurred at revision r2899.

PyMedia Input bug was two-fold:

• Not handling when pymedia returns "None" instead of string like (not actually string) data; or empty strings
• Not handling noSpaceInBox exceptions - more likely if pumping out small fragments of data, and never really pausing/waiting
  

PyGame Display bug:

• win32 and MacOSX limitations in pygame/SDL require the display to be initialised, and event handling to be done in the application's main thread - not a child thread. Fixed by moving everything into the main thread, but still keeping the child thread as a passive observer that makes sure the main component gets woken up if events are waiting.

show.py bug:

• misunderstood use of the xml.sax.make_parser call - should have provided a list of strings as an argument rather than a string. Seems to work on Linux on test machines used by MS and MH, but problem shows up on win32 and MacOSX.
  

-- Matt, 25 April 2007