Commit hopefully final version of direcsound support with capability to use the microsoft AEC if both the READ and WRITE filter from directsound are used in the same graph.
Commit hopefully final version of direcsound support with capability to use the microsoft AEC if both the READ and WRITE filter from directsound are used in the same graph.

git-svn-id: 8f60b0cb95795e7f2da4f2192af0e1f6ffac8291@472 3f6dc0c8-ddfe-455d-9043-3cd528dc4637

avis/ortp,jiangjianping/ortp,caizw/ortp,dozeo/ortp,samueljero/linphone-oRTP,Linphone-sync/oRTP,VTCSecureLLC/ortp,samueljero/linphone-oRTP,videomedicine/oRTP,caizw/ortp,carpikes/ortp,Linphone-sync/oRTP,dmonakhov/ortp,videomedicine/oRTP,VTCSecureLLC/ortp,avis/ortp,videomedicine/oRTP,VTCSecureLLC/ortp,Distrotech/oRTP,carpikes/ortp,dozeo/ortp,wugh7125/ortp,Linphone-sync/oRTP,wugh7125/ortp,jiangjianping/ortp,Distrotech/oRTP,dozeo/ortp,Distrotech/oRTP,carpikes/ortp,jiangjianping/ortp,samueljero/linphone-oRTP,wugh7125/ortp,dmonakhov/ortp,avis/ortp,dmonakhov/ortp,caizw/ortp