[wdmaudiodev] Re: AW: DirectSound and PowerDVD/WinDVD Strange behavior
- From: david lee <davidlioncity@xxxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Mon, 11 Oct 2004 18:29:38 +0800 (CST)
Dear Stephan,
In fact, I set theConnectionInterface.Id =NULL, then what is the default value.
According to what you say, as long as I update the position, the port class
will send more valid data to me. Am I correct?
Thanks
Stephan Kappertz <stephan@xxxxxxxxxx> wrote:
You should check the pins ConnectionInterface.Id when the pin is created. Most
likely the ConnectionInterface is KSINTERFACE_STANDARD_LOOPED_STREAMING. This
means that your driver 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.
Stephan
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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
David
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