[wdmaudiodev] AW: DirectSound and PowerDVD/WinDVD Strange behavior

  • From: "Stephan Kappertz" <stephan@xxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Mon, 11 Oct 2004 11:56:06 +0200

You should check the pins ConnectionInterface.Id when the pin is
created. Most likely the ConnectionInterface is
receives just one valid circular buffer when playback starts. It is
supposed to loop through this buffer until playback stops. The current
DMA position that your driver reports will be used to update the portion
of the circular buffer with new data that is currently NOT played. 
 -----Ursprüngliche Nachricht-----
Von: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] Im Auftrag von david lee
Gesendet: Monday, October 11, 2004 11:35 AM
An: wdmaudiodev@xxxxxxxxxxxxx
Betreff: [wdmaudiodev] DirectSound and PowerDVD/WinDVD Strange behavior

Dear all,
When I use PowerDVD/WinDVD SPDIF pass through and select direct sound
audio render, I always get a lot of zero data with a few valid data in
the beginning of playback. Due to use driver to decode the AC3/DTS data,
I am not sure how to handle these zero data. Any suggestion? (Treat them
as data need to be decoded or as rubbish and discarded)
BTW, if I select waveout audio render, All the data at the beginning are
useful valid data,which I can decode.
Thanks in advance

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