I also posted such mail few days back but there was no reply. There is not a single person on this mailing list who has worked on WavePCI ???? Your suggestions would really really help us. Waiting for your reply. On Tue, Oct 14, 2008 at 4:30 PM, pritesh gajjar <gajjar.pritesh@xxxxxxxxx>wrote: > Hello All, > I have implemented WavePCI in my driver. My mapping calls of > GetMapping () and ReleaseMapping () are working fine. Following are thing > which I have done. > > 1. I created DmaChannel through NewMasterDmaChannel(), this works fine > gives DmaChannel object. Passed as out parameter to NewStream (). > 2. Allocated tables through AllocateCommonBuffer() call. > 3. Created a timer object , DPC object which calls DPC after every > interval(e.g. 10ms) and wrote a DPC in which I am calling Notify() of > PortCls. > 4. Methods of WavePCI interface are implemented one of them is Service () > which is invoked after above Notfiy() call by PortCls. > 5. This Service() gives call to ReleaseMapping()/GetMapping() methods saves > their out parameters in a table as ac'97 does. > > This is implemented as per MSDN documentation. Now the Driver runs > continuously and consumes so many CPU cycles, the system slows down. But if > I only obtain possible mappings in first GetMapping () call that is no > MappingAvailable () then it runs smoothly. But still I do not get any audio > only noise is produced. And one more thing I do get some value in VirtAddr > pointer of GetMapping () . > I also tried with common table between Capture / Renderer streams, but > that didn't help. With IDmaChannel channel implementation also I tried, and > passed casted stream object through Newstream(), but that also didn't > helped. > > Is there something else also that in WavePCI it needs to be implemented. > If anyone has any suggestion about then please reply ? > > > -- > Thanks and regards > Pritesh > >