Project Task Page: Dirac 0.6.0 Bindings

Description

Dirac python bindings are for dirac version 0.5.4. Dirac has moved onto 0.6.0 and there have been API changes which make the bindings incompatible (see IRC logs)

Update the bindings for compatibility with 0.6.0. If possible find a way to maintain compatibility with 0.5.4.

Inputs

Task Sponsor: MH

Task Owner: MH

Developers: MH, MS

Users: lawouach (IRC handle)

Interested third parties: MS, lawouach (IRC handle)

Requirements

• MUST provide compability with Dirac 0.6.0 release
  
• WOULD LIKE to maintain the option of still working with Dirac 0.5.4
  

Outputs

Expected

New/updated bindings in

• /Code/Python/Bindings/Dirac
  

Actual

Branch /branches/private_MH_20070425_dirac0.6.0bindings/

...containing modifications to:

• /Code/Python/Bindings/Dirac ( renamed to /Code/Python/Bindings/Dirac-0.5.4 )
  
• /Code/Python/Bindings/Dirac-0.6.0 (added)
• /Code/Python/Kamaelia/Kamaelia/Codecs/Dirac.py
• /Code/Python/Kamaelia/Examples/VideoCodecs/Dirac/SimpleDiracPlayer.py
• /Code/Python/Kamaelia/Examples/VideoCodecs/Dirac/snowboard-jum-352x288x75.dirac.drc ( renamed to Dirac/snowboard-jump-352x288x75.0.5.4.drc )
• /Code/Python/Kamaelia/Examples/VideoCodecs/Dirac/snowboard-jum-352x288x75.0.6.0.drc

Modifications merged into /trunk

Realistic possibilities arising as a result of activity on this task

• /trunk/Sketches/MH/dirac still contains yet another set of bidings reflecting even more recent changes currently in dirac cvs (but not yet in a release) ... when this release is made, a new set of bindings should be issued.
  

Related Tasks

Tasks that directly enable this task (dependencies)

none

Sub Tasks

• Development and testing of new bindings
• Branch containing modifications
• Merge of branch

Task Log

• 2006 10 11 : Task status changed to running
  
• 2007 10 11 : Added developer MH
• 2007 10 17 : Tested and checked new bindings into /Sketches/MH/dirac/
• 2007 04 25 : Time spent 4 days
• 2007 10 18 : Task status changed to stasis
  
• 2007 04 25 : Task status changed to running
  
• 2007 04 25 : Created branch /branches/private_MH_20070425_dirac0.6.0bindings/
• 2007 04 25 : Ready for merging into /trunk
  
• 2007 04 25 : Time spent 0.5 days
• 2007 04 27 : Removed developer MH
• 2007 04 27 : Added developer MS
• 2007 04 27 : Merge complete
• 2007 04 27 : Time spend 0.5 days
• 2007 04 27 : Task status changed to completed
  

Discussion

Discovered it was possible to simply keep two sets of bindings - for 0.5.4 and 0.6.0. Pyrex does not yet support conditional compilation, so two sets of bindings is an alternative simple solution.

Added a version number attribute to 0.6.0 which the component now tests for so it knows how to behave differently depending on which bindings it has available.

Note that there was a change in bitsam syntax between 0.6.0 and 0.5.4 so files compressed with one cannot be played back by the other.

Modified examples so there are two example compressed files - one for 0.5.4 and one for 0.6.0. 'simple playback' example program modified to take a command line argument to specify which.

-- Matt, 25 April 2007