add dvdnav_set_active_stream

Provided the physical stream index and its type (audio or subtitles) set it as active on the vm.

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Ok so... last one I miss from the dvdnav interface to finally get rid of the private VM usage in Kodi (hoping the other 2 pending PRs also go in). A way to activate a given subtitle or audio stream provided its physical index:

• The provided index is validated before usage.
• Reuses the same dvdnav_stream_type_t recently introduced
• The indexes are consistent with the other functions available on the lib interface (e.g. dvdnav_get_spu_attr(...,uint8_t audio_num) or dvdnav_get_spu_logical_stream(..., uint8_t subp_num)

Just for reference, the Kodi implementation this tries to avoid is available here.

Runtime tested with: https://github.com/enen92/xbmc/commit/5be53259936e150f49d34cbf59ee5dd5b5ab31b1

The PR will need to be rebased when (and if) !36 (merged) is merged as it adds code to the same subsection.

Cheers

!36 (merged) is merged. Please rebase.

changed milestone to %7.0.0

requested review from @jbk

assigned to @jbk

added 2 commits

• 2d23b75e - 1 commit from branch videolan:master
• 0b02b6ca - add dvdnav_set_active_stream

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resolved all threads

approved this merge request

added 3 commits

• 0b02b6ca...777763e6 - 2 commits from branch videolan:master
• e5425979 - add dvdnav_set_active_stream

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resolved all threads

enabled an automatic merge when the pipeline for e5425979 succeeds

merged