Is there some code converting PVRTCII to RGBA8888 or other bitmap format?

As shown above, i found that in $SDK/Tools/OGLES2/PVRTTextureAPI.cpp, function PVRTTextureLoadFromPointer can only automaticly try to convert PVRTCI to RGBA8888, BUT i desire a way to convert PVRTCII to RGBA8888 also. How to make it ?

You may want to try the answer provided here:

But i still desire a standalone decode method…ah…Why no public official method? Note that, the official org has already made it in PvrTexLib?