[Sc2-devel] SDL_mixer issues

[Chris N. <ch...@to...>]

SDL_mixer appears to lack some functionality that we need.

Specifically, we need to be able to start playing a sound effect at
places other than the beginning of the sound effect. This is necessary
in order to implement the rewind / fast-forward functions in
conversation, for voices.

Also, we need a function which will determine the length of a sound
effect (Mix_Chunk), in milliseconds. Mix_Chunk->alen tells us the length
in bytes, but we aren't given any direct way to determine the sampling
rate, or the bits per sample (or stereo vs mono). SDL_mixer might
convert each sound effect to the audio output format, when it loads a
wav... This would make sense. In this case, it would be easy to use
Mix_Chunk->alen to detemine a sound effect's length, in conjunction with
Mix_QuerySpec(). Can somebody please verify this, or even write such a
function?

This website has documentation for SDL_mixer:

http://jcatki.no-ip.org/SDL_mixer/SDL_mixer_frame.html

Thanks.

-Chris