[wdmaudiodev] AVStream Clock CorrelatedTime Callback Invalid PKSPIN
- From: Richard Lince <Richard.Lince@xxxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 23 Aug 2013 11:15:26 +0000
Hi folks,
Im trying to Implement an audio clock in an AVStream driver as follows,
however, the callback argument is an invalid pin pointer (and 'this' pointer in
debugger).
It seems to be common on the internet as an issue with no resolution, any ideas?
//class header
const static KSCLOCK_DISPATCH AudioClockDispatch;
static LONGLONG DispatchCorrelatedTime ( IN PKSPIN Pin, OUT PLONGLONG
SystemTime)
{
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!! invalid PKSPIN Pin on callback
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
return (reinterpret_cast <CCaptureAudioPin *> (Pin -> Context)) ->
CorrelatedTime ( Pin, SystemTime);
}
//class body
const KSCLOCK_DISPATCH CCaptureAudioPin::AudioClockDispatch = {
NULL,//PFNKSPINSETTIMER SetTimer;
NULL,//PFNKSPINCANCELTIMER CancelTimer;
(PFNKSPINCORRELATEDTIME)CCaptureAudioPin::DispatchCorrelatedTime,
//PFNKSPINCORRELATEDTIME CorrelatedTime;
(PFNKSPINRESOLUTION)CCaptureAudioPin::DispatchResolution
//PFNKSPINRESOLUTION Resolution;
};
const KSPIN_DISPATCH CaptureAudioPinDispatch = {
CCaptureAudioPin::DispatchCreate, // Pin Create
NULL, // Pin Close
CCaptureAudioPin::DispatchProcess, // Pin Process
NULL, // Pin Reset
CCaptureAudioPin::DispatchSetFormat, // Pin Set Data Format
CCaptureAudioPin::DispatchSetState, // Pin Set Device State
NULL, // Pin Connect
NULL, // Pin Disconnect
&CCaptureAudioPin::AudioClockDispatch, // Clock Dispatch
NULL // Allocator Dispatch
};
Compiles and callback time is fine.
Thanks in advance if you have any ideas.
Rich.
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