-- v2: dmime: Use latency time to decide when to process messages. dmime: Update performance latency time with port latency. dmime: Use port latency time for messages with -1 time. dmusic: Forward IDirectMusicPort_Activate to synth and sink. dmsynth: Do nothing in IDirectMusicSynth_SetMasterClock. dmusic: Set synth sink master clock when creating port. dmime: Rewrite message thread with a condition variable.