AE: add planar formats to end of enum, some other code relies on the order
AudioEngine: Add AE_IS_PLANAR(x) macro
AE: WASAPI - fix AddPackets for the case of provided frames are less than buffer size
ActiveAE: engage transcode for stereo if upmix is selected
ActiveAE: flush engine on flush stream if only one stream is active
ActiveAE: check for error during playback
dvdplayer: flush audio on close stream in case of nowait
ActiveAE: faster flushing of stream
AE: WASAPI - fix GetDelay
ActiveAE: do not pause stream when flushing it
AE: adapt limiter to planar formats
ActiveAE: fix volume amplification
AESinkOSS: Implement Drain()