[wdmaudiodev] Re: AVStream Clock CorrelatedTime Callback Invalid PKSPIN
- From: Richard Lince <Richard.Lince@xxxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 4 Sep 2013 16:47:06 +0000
Excellent Matthew, this does the trick, obviously the call stack was not lying
correctly against __cdecl.
I shall check with ks.h conventions more often.
Regards,
Richard Lince,
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Matthew van Eerde
Sent: 23 August 2013 15:37
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: AVStream Clock CorrelatedTime Callback Invalid PKSPIN
From ks.h:
_IRQL_requires_max_(DISPATCH_LEVEL)
typedef
LONGLONG
(FASTCALL *PFNKSPINCORRELATEDTIME)(
_In_ PKSPIN Pin,
_Out_ PLONGLONG SystemTime
);
Try adding FASTCALL to your DispatchCorrelatedTime declaration:
static LONGLONG FASTCALL DispatchCorrelatedTime ...
If you add /Gr to your compiler flags, that will cause the compiler to default
to FASTCALL for functions which don't have an explicit calling convention.
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Lince
Sent: Friday, August 23, 2013 4:15 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] AVStream Clock CorrelatedTime Callback Invalid PKSPIN
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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