Emulator

About 1: Running gamecube games from disc channel does not work in Dolpin. How many 2 disc wii games are there? Is there even one? If there isn't one, i'd suggest to switch only for gamecube games, problem solved.

About 2: It should switch between disc 1 and disc 2. As long as there are not multiple copies, it's clear which disc to insert. If there are multiple copies for the same disc, don't switch the disc. In this case, it's possible a patched and a not patched version are in the list. But since this is really rare, i would not add a GUI option for this.

If you go on about GUI changes, i propose the following:

• For 2 disc games, show only 1 entry. Maybe add disc 1&2 or something. (only if there's 1 version for each disc, see above)
• For 2 disc games, where only one disc is present, show something like "disc 1 only"

1. That's true. (There are no dual-disc Wii games, only dual-layer ones.) I suppose GC games might start working at some point in the future, but it's probably not something we have to worry about.

2. I mostly agree with what you said (although detecting if disc 1 is part of a multi-disc game is impossible, because they look identical to disc 1 of a single-disc game). But what I was thinking of was how to implement it. The way things are right now, DVDInterface doesn't know anything about what the path to the current or the next disc image is, except in the very moment the user presses "Change Disc".

There are no two-disk Wii games.

There isn't any way to tell whether we're looking at disk one of a two-disc game, short of hardcoding a list of known two-disc games.

If you want something small to start with, you could OSD::AddMessage() to display a hint to use the Change Disc menu item, and we could see how that works without any invasive changes.

Good idea. https://github.com/dolphin-emu/dolphin/pull/2214

Just search for a game with the same ID but disk number 1 higher than the current one. Single disc games will obviously find nothing, so just do nothing in that case.