[wdmaudiodev] Help!! Audio capture filter can not be closed by me ~~~
- From: 林宏沛 <huengpei@xxxxxxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 5 May 2005 17:02:50 +0800
Dear All:
I am developing an USB audio driver with AVStream framework.
The graphedit.exe is my test tool now.
When I use the audio filter in "Audio Capture Source" category,
I have meet a strange problem. (not from folder of WDM Streaming Capture
Devices)
First, audio sound can be played well in the filter.
However, when the graph is stopped by me, I must return all pending
StreamPointers in the (KSSTATE_RUN -> KSSTATE_PAUSE) state, otherwise the
graphedit will be held by system.
I have done 2 tests below:
1. When I return all pending pointers in the KSSTATE_STOP stage, I can't close
the graphedit.
The device need be removed, then graphedit can continue to be closed.
2. When I return all pending pointers in the (KSSTATE_RUN -> KSSTATE_PAUSE)
stage, the graphedit can be normally closed.
In some reasons, I must return remaining StreamPointers in KSSTATE_STOP stage.
How can I do?
I have referred some Microsoft's sample codes, they all return the remaining
StreamPointers in KSSTATE_STOP state.
Are there some mistakes in my driver setting?
Best Regards,
H.P.
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