changed _noninterleaved functions to _int and changed related descriptions appropriately
added an _int version of SDX2 and reverted to pre-322 behavior for normal deocder
made the various get_high_nibble globals all be the same vgmstream->get_high_nibble for thread safety and code consolidation (this required some changes to make decode functions take VGMSTREAM rather than VGMSTREAMCHANNEL)
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@323 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
Also fix xbox ima decoder, it was wrong if the decode didn't always start at the block start. Note that this and the nds ima decoder both rely on being run through the file linearly.
I wasn't able to test this on mono wavm or xwav yet, but I think it ought to work.
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@217 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
