Hi Eugene,My interpretation of the documentation is that GetPosition should return a count of the actual bytes processed, and in my drivers I do a sanity check that the position is <= bytes received and >= bytes released. On that basis, GetPosition stops advancing if there are no more mappings once all the outstanding mappings have been released. I'd be very interested to hear the official position on this though.
Jeff----- Original Message ----- From: "Eugene Muzychenko" <emuzychenko@xxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx> Sent: Tuesday, February 12, 2008 7:33 PM Subject: [wdmaudiodev] IMiniportWavePciStream::GetPosition and no mappings
Hello! Does anybody know how IMiniportWavePciStream::GetPosition should handle an absence of mappings in a running stream? In other words, should stream position progress if a stream client did not provide a next buffer and stream's mapping list is empty? Or stream position should count only actually processed data from client buffers, and not to move forward if there are no buffers available? Regards, Eugene ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/
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