Parse, store and log descrambler info

[Jalle19]

Partially closes #106. The API will need some changes in order to make this information useful (for now it's just stored, not passed along to Kodi in any way).

[ksooo]

The API will need some changes in order to make this information useful

I will be happy to include this change in our PVR Addon API 5.0.0 PR if you point me to a proper commit that I can cherry-pick. ;-)

[Jalle19]

Scribbling some stuff here for future reference:

Addons will need a way to publish descrambler information to Kodi. Kodi should then store this information in CPVRGUInfo where the skin can grab it. Kodi should clear the stored information when changing channels or when stopping playback to prevent stale information from being displayed.

Since most existing API methods are "pull" methods (i.e. Kodi pulls the information from the addon) this one should probably follow that convention. This way Kodi can also control whether to fetch the information at all.

The method signature could be something like this: PVR_ERROR GetDescramblerInfo(PVR_DESCRAMBLER_INFO *info) where PVR_DESCRAMBLER_INFO is a struct. This struct could probably be quite close to the descrambleInfo message tvheadend sends to clients since that contains pretty much every piece of information a descrambler could possibly provide. This method would be called during playback at certain intervals.

While we're at it I'd like to also implement an API method for retrieving e.g. how many tuners the server has, which tuners are used at the moment, what is the delivery system used for the current channel (DVB-T/C/S etc.) and so on. There are some skins (notable Aeon Nox master) that technically support all this data, there's just no way to get them at the moment.

[ksooo]

While we're at it I'd like to also implement an API method for retrieving e.g. how many tuners the server has, which tuners are used at the moment, what is the delivery system used for the current channel (DVB-T/C/S etc.) and so on.

Nice

[Jalle19]

I actually started work on the latter suggestion in a branch, I'll try to revive it at some point. How much in a hurry are you to get the 5.0.0 API bump in?

[ksooo]

No hurry at all. Just collecting stuff atm. Want to avoid multiple API bumps for Krypton, if possible.

[ksooo]

This one can be closed, I cherry-picked the main commit for #315