Wii: preload some audio voices

[mardy]

This is a draft, both because it's a quick hack (I didn't even bother to check if resources are properly freed), and because I'm not sure that this is the solution we are looking for.

But this fixes the delays on the Wii, when the game pauses just before playing a sound.

I'm not sure I'll have time to work on this soon, but please let me know if you can suggest a better approach, or how to improve this one. Or close it, if you think it's not relevant for other platforms.

[parasti]

@mardy I see you precached the decoded PCM samples instead of the raw file data. Was decoding necessary to fix the delays on Wii?

[mardy]

@mardy I see you precached the decoded PCM samples instead of the raw file data. Was decoding necessary to fix the delays on Wii?

Yes, storing in RAM the ogg files didn't lead to any visible improvement. :-(

By the way, there are still some random delays, not as frequent as before, and apparently not related to any game events. Maybe it's the music, I need to investigate that as well.