Add manual scanning workflow for MA-21

[webmogul1]

Although the automated scan when slide inserted is valid, when using a FH-3 strip holder you don't remove the holder to scan the next frame, you just slide it into the scanner. So, a manual scan is necessary.

• Add MA-21 detection using the scanner's reported addressing type
• Prompt the user to replace or advance the media before scanning the next frame

[activexray]

In an effort to keep things maximally generic (I'm trying to not key on reported peripherals and only on like advertised capabilities), I need to check to see if there's a more generic way to handle these "manual operations"

[webmogul1]

It works fine if is a single slide that you have to remove, because you get media_loaded() to false.
But for the FH-3, it is not practical to remove the holder for every frame scan.

Another benefit of manual operation is if for any reason you want to scan the same frame again.

ohh, what about ignoring the reported peripherals stuff and just adding a option to scan again?

[webmogul1]

closed and deleted by mistake

[activexray]

I'll look into this later this evening, have to go to real job 😅

[webmogul1]

no worries.

[activexray]

Ok I think I've merged a version of this in 0.5

[webmogul1]

Perfect!