BizHawk is a multi-system emulator written in C#. BizHawk provides nice features for casual gamers such as full screen, and joypad support in addition to full rerecording and debugging tools for all system cores.
-As you'll recall, the script has 3 methods of keeping track of input:
--1. Tracking the button counts in real time. This took some minor adjustments, but seems to work fine.
--2. Parsing the button presses from a loaded, read-only TAS file when starting the script, if possible.
---This works well enough after a good amount of refactoring, but I only have it rigged to work for NES.
---As always, note that this method is very slow for big movies, which is why we only use it once.
--3. Caching the counts when saving a state and loading them when loading a state.
---savestate.registerload and savestate.registersave are not currently supported by BizHawk, so this is not functioning at all.
-I propose that a function called movie.getframe(frame) be added that gets status of all of the buttons, just like joypad.get(), for a given frame of a movie.
--This makes the would make method 2 trivial and fast.
--It would allow me to generalize the function for all platforms easily.
---Certainly there might be some discrepancies about which buttons should be disallowed, if any (Is Reset a button press?), but still.
--If this method could somehow work for non-readonly movies, then I'd be able to use the movie to get the counts when I load a state that doesn't have cached data.
---Trust me when I tell you that this would be immensely useful for minimum button TASing. The process would be seamless, and all of these methods combined would provide perfect accuracy while being fairly efficient and only using intensive routines when absolutely necessary.
Note: Earlier, I came up with the idea for a function that lets you set what frame of the movie you are on, which would be useful for endless TASes like we've already discussed, adelikat. Do you still think this is worth having?