Stopping DVD/Audio CD autoplay
Simon Macneall
Has anyone had any success using the IQueryCancelAutoPlay interface to stop
Video DVD or Audio CD from auto playing on insertion? I've implemented the
AllowAutoPlay method, but it is not being called on disc insertion.
Thanks
Simon
Remy Lebeau (TeamB)
"Simon Macneall" <macneall-at-iinet.net.au> wrote in message
news:Xns94E15253CC42Fm...@207.105.83.66...
IQueryCancelAutoPlay is only available under XP. Are you running XP at the
time? If so, then did you instantiate an instance of your
IQueryCancelAutoPlay descendant interface and register it with the OS's
Running Object Table at runtime? Did you also register your
IQueryCancelAutoPlay interface's CLSID in the Registry?
Gambit
Simon Macneall
news:409984a1$1...@newsgroups.borland.com:
>
> IQueryCancelAutoPlay is only available under XP. Are you running XP
> at the time? If so, then did you instantiate an instance of your
> IQueryCancelAutoPlay descendant interface and register it with the
> OS's Running Object Table at runtime? Did you also register your
> IQueryCancelAutoPlay interface's CLSID in the Registry?
>
>
> Gambit
>
Yes, tested on XP, added to the ROT (have checked width rot viewer, and it
is there
I have put my CLSID in the registry
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer
\AutoplayHandlers\CancelAutoplay\CLSID, in a string value "0914A446-E6FA-
42a4-9A8A-7D9BDD87F017" with no data
here is my code, can you see anything wrong here? The only thing I am a bit
unsure of is that Borland (BCB6) had problems linking with
IID_IQueryCancelAutoPlay, so I had to add it manually
struct __declspec(
uuid("{DDEFE873-6997-4e68-BE26-39B633ADBE12}")) IID_IQueryCancelAutoPlay;
DEFINE_GUID(IID_IQueryCancelAutoPlay,
0xDDEFE873, 0x6997, 0x4e68, 0xBE, 0x26, 0x39, 0xB6, 0x33, 0xAD, 0xBE,
0x12);
class CAutoPlayInterceptor : public CUnknown, public IQueryCancelAutoPlay
{
protected:
public:
DECLARE_IUNKNOWN
CAutoPlayInterceptor();
~CAutoPlayInterceptor();
STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);
STDMETHODIMP AllowAutoPlay(LPCWSTR pszPath, DWORD dwContentType, LPCWSTR
pszLabel, DWORD dwSerialNumber);
};
CAutoPlayInterceptor::CAutoPlayInterceptor() :
CUnknown("Auto Play Interceptor", NULL)
{
}
CAutoPlayInterceptor::~CAutoPlayInterceptor()
{
}
STDMETHODIMP CAutoPlayInterceptor::AllowAutoPlay(LPCWSTR pszPath, DWORD
dwContentType, LPCWSTR pszLabel, DWORD dwSerialNumber)
{
if (dwContentType == ARCONTENT_DVDMOVIE || dwContentType ==
ARCONTENT_AUTOPLAYVIDEO)
{
OutputDebugString("Killing autoplay");
return S_FALSE;
}
OutputDebugString("Got AllowAutoPlay, allowing it");
return S_OK;
}
STDMETHODIMP CAutoPlayInterceptor::NonDelegatingQueryInterface(REFIID riid,
void** ppv)
{
if (riid == IID_IQueryCancelAutoPlay)
{
return GetInterface(( IQueryCancelAutoPlay*)this, ppv);
}
else
{
return CUnknown::NonDelegatingQueryInterface(riid, ppv);
}
}
Thanks
Simon
Remy Lebeau (TeamB)
> I have put my CLSID in the registry
Are you using a Type Library? Did you register the standard registration
values for COM interfaces in the Registry? Did you put your CLSID value
under the HKCR\CLSID key, with values to point back to your executable file?
> "0914A446-E6FA-42a4-9A8A-7D9BDD87F017"
Where is that value defined in your code?
> class CAutoPlayInterceptor : public CUnknown, public IQueryCancelAutoPlay
Are you using MFC?
Gambit
Jim Dodd
Does this note from MSDN help?
Regards,
Jim Dodd
Onset Computer Corp.
Simon Macneall
news:409a...@newsgroups.borland.com:
> Does this note from MSDN help?
>
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellc
> c/platform/shell/programmersguide/shell_basics/shell_basics_extending/a
> utorun/autoplay_reg.asp
>
> Regards,
>
> Jim Dodd
> Onset Computer Corp.
>
>
Thanks, but no, that message is only sent for discs that have an
autorun.inf file, which Audio CDs and Movie DVDs don't.
Simon
Simon Macneall
>
> "Simon Macneall" <macneall-at-iinet.net.au> wrote in message
> news:Xns94E160383D857m...@207.105.83.66...
>
>> I have put my CLSID in the registry
>
> Are you using a Type Library? Did you register the standard
> registration values for COM interfaces in the Registry? Did you put
> your CLSID value under the HKCR\CLSID key, with values to point back
> to your executable file?
>
All I did was create a class that implements the interface and added it to
my executable. What standard COM interfaces need to be registered, and
where? No, are you supposed to also put your CLSID somewhere under HKCR?
>> "0914A446-E6FA-42a4-9A8A-7D9BDD87F017"
>
> Where is that value defined in your code?
in a .h file like thus
struct __declspec(
uuid("{0914A446-E6FA-42a4-9A8A-7D9BDD87F017}")) CLSID_AutoPlayInterceptor;
>
>> class CAutoPlayInterceptor : public CUnknown, public
>> IQueryCancelAutoPlay
>
> Are you using MFC?
This is a standard Borland VCL exe and I am getting the Interface stuff
from DirectShow
Thanks
Simon
Remy Lebeau (TeamB)
> All I did was create a class that implements the interface and added it to
> my executable.
Further reading of MSDN shows the following:
"Upon presentation of media, the Shell searches the ROT for a component
implementing IQueryCancelAutoPlay. If one is found, ***the class identifier
(CLSID) of that component's moniker*** is extracted."
This suggests that your IQueryCancelAutoPlay interface has to support the
IMoniker interface as well. IMoniker derives from IPersist, which has a
GetClassID() method for retreiving the object's CLSID. I will bet that your
interface does not support that properly, so when the OS goes looking for
your object, it can't verify the CLSID so your interface doesn't get called
to block the AutoRun. If you look in your QueryInterface(), does
IID_IMoniker (or similar) ever get requested?
I do notice that there is a SHCreateQueryCancelAutoPlayMoniker() function
available as well.
BTW, how are you adding your interface to the ROT in the first place?
Gambit
Simon Macneall
> Further reading of MSDN shows the following:
>
> "Upon presentation of media, the Shell searches the ROT for a
> component
> implementing IQueryCancelAutoPlay. If one is found, ***the class
> identifier (CLSID) of that component's moniker*** is extracted."
>
> This suggests that your IQueryCancelAutoPlay interface has to support
> the IMoniker interface as well. IMoniker derives from IPersist, which
> has a GetClassID() method for retreiving the object's CLSID. I will
> bet that your interface does not support that properly, so when the OS
> goes looking for your object, it can't verify the CLSID so your
> interface doesn't get called to block the AutoRun. If you look in
> your QueryInterface(), does IID_IMoniker (or similar) ever get
> requested?
>
> I do notice that there is a SHCreateQueryCancelAutoPlayMoniker()
> function available as well.
>
> BTW, how are you adding your interface to the ROT in the first place?
>
>
Thanks for your help Remy, I got it working using a sample I found in the
November 2001 MSDN, and adding the registry key that we talked about
earlier.
As for adding to the ROT...
namespace
{
DWORD rotReg = 0xf000000;
}
DWORD DirectXUtils::AddGraphToROT(IUnknown* inGraph)
{
CComPtr<IMoniker> moniker;
CComPtr<IRunningObjectTable> rot;
DWORD retVal = 0;
if (SUCCEEDED(GetRunningObjectTable(0, &rot)))
{
WCHAR wsz[256];
wsprintfW(wsz, L"AutoPlayInterceptor %08x pid %08x", 0,
GetCurrentProcessId());
if (SUCCEEDED(CreateItemMoniker(L"!", wsz, &moniker)))
{
retVal = rotReg;
rot->Register(0, inGraph, moniker, &retVal);
rotReg = retVal ? rotReg + 1 : rotReg;
}
}
return retVal;
}
was what I had previously, which was adding to the ROT, I am now using
the code from the MSDN article...
Simon
Simon Macneall
>
> Thanks, but no, that message is only sent for discs that have an
> autorun.inf file, which Audio CDs and Movie DVDs don't.
>
> Simon
>
Just to update, apparently that message is supposed to be sent on insertion
of all discs. It is working on the XP laptop that we have here, but not on
my 2k development machine. If anyone knows why I would be grateful for the
information.
Simon
Remy Lebeau (TeamB)
> Thanks for your help Remy, I got it working using a sample I found in the
> November 2001 MSDN, and adding the registry key that we talked about
> earlier.
Can you please show your actual code?
Gambit
Remy Lebeau (TeamB)
> WCHAR wsz[256];
> wsprintfW(wsz, L"AutoPlayInterceptor %08x pid %08x", 0,
> GetCurrentProcessId());
> if (SUCCEEDED(CreateItemMoniker(L"!", wsz, &moniker)))
I suspect that you should be using SHCreateQueryCancelAutoPlayMoniker()
instead of CreateItemMoniker().
> rot->Register(0, inGraph, moniker, &retVal);
You are registering an IMoniker that has no actual connection to your custom
IQueryCancelAutoPlay object at all. I don't see how the ROT can query the
OS-provided IMoniker to gain information about your IQueryCancelAutoPlay
object when it needs it.
Gambit
Simon Macneall
>
> Can you please show your actual code?
>
>
> Gambit
>
>
>
Sure, this is all taken from
<http://msdn.microsoft.com/msdnmag/issues/01/11/autoplay/default.aspx>
Enjoy,
Simon
AutoPlayInterceptor.h
#ifndef AUTO_PLAY_INTERCEPTOR_H
#define AUTO_PLAY_INTERCEPTOR_H
#include <thirdparty/DirectXBaseClasses.h>
#include "shobjidl.h"
#include <initguid.h>
class CAutoPlayInterceptor : public IQueryCancelAutoPlay
{
protected:
public:
STDMETHODIMP QueryInterface(REFIID riid, void** ppv);
STDMETHODIMP_(ULONG) AddRef();
STDMETHODIMP_(ULONG) Release();
STDMETHODIMP AllowAutoPlay(LPCWSTR pszPath, DWORD dwContentType, LPCWSTR
pszLabel, DWORD dwSerialNumber);
HRESULT Init(DWORD dwContentType);
CAutoPlayInterceptor();
~CAutoPlayInterceptor(){};
private:
ULONG _cRef;
DWORD _dwContentType;
};
#endif // AUTO_PLAY_INTERCEPTOR_H
AutoPlayInterceptoruids.h
const static CLSID g_clsidAutoPlayInterceptor =
{ 0x0914a446, 0xe6fa, 0x42a4,
{ 0x9a, 0x8a, 0x7d, 0x9b, 0xdd, 0x87, 0xf0, 0x17 }};
struct __declspec(
uuid("{0914A446-E6FA-42a4-9A8A-7D9BDD87F017}")) CLSID_AutoPlayInterceptor;
DEFINE_GUID(CLSID_AutoPlayInterceptor,
0x0914A446, 0xE6FA, 0x42a4, 0x9A, 0x8A, 0x7D, 0x9B, 0xDD, 0x87, 0xF0,
0x17);
struct __declspec(
uuid("{DDEFE873-6997-4e68-BE26-39B633ADBE12}")) CLSID_QueryCancelAutoPlay;
DEFINE_GUID(CLSID_QueryCancelAutoPlay,
0xDDEFE873, 0x6997, 0x4e68, 0xBE, 0x26, 0x39, 0xB6, 0x33, 0xAD, 0xBE,
0x12);
struct __declspec(
uuid("{DDEFE873-6997-4e68-BE26-39B633ADBE12}")) IID_IQueryCancelAutoPlay;
DEFINE_GUID(IID_IQueryCancelAutoPlay,
0xDDEFE873, 0x6997, 0x4e68, 0xBE, 0x26, 0x39, 0xB6, 0x33, 0xAD, 0xBE,
0x12);
AutoPlayInterceptor.cpp
#include "AutoPlayInterceptor.h"
#include "AutoPlayIntercepteruids.h"
CAutoPlayInterceptor::CAutoPlayInterceptor() :
_cRef(1)
{
}
HRESULT CAutoPlayInterceptor::Init(DWORD dwContentType)
{
_dwContentType = dwContentType;
return S_OK;
}
STDMETHODIMP CAutoPlayInterceptor::AllowAutoPlay(LPCWSTR pszPath, DWORD
dwContentType, LPCWSTR pszLabel, DWORD dwSerialNumber)
{
HRESULT hr = S_OK;
if (dwContentType & _dwContentType)
{
hr = S_FALSE;
}
return hr;
}
STDMETHODIMP CAutoPlayInterceptor::QueryInterface(REFIID riid, void** ppv)
{
IUnknown* punk = NULL;
HRESULT hr = S_OK;
if (IID_IUnknown == riid)
{
punk = static_cast<IUnknown*>(this);
punk->AddRef();
}
else
{
if (IID_IQueryCancelAutoPlay == riid)
{
punk = static_cast<IQueryCancelAutoPlay*>(this);
punk->AddRef();
}
else
{
hr = E_NOINTERFACE;
}
}
*ppv = punk;
return hr;
}
STDMETHODIMP_(ULONG) CAutoPlayInterceptor::AddRef()
{
return ::InterlockedIncrement((LONG*)&_cRef);
}
STDMETHODIMP_(ULONG) CAutoPlayInterceptor::Release()
{
ULONG cRef = ::InterlockedDecrement((LONG*)&_cRef);
if (!cRef)
{
delete this;
}
return cRef;
}
Add
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer
\AutoplayHandlers\CancelAutoplay\CLSID\0914A446-E6FA-42A4-9A8A-7D9BDD87F017
as a string key with no value
In the application, Call RegisterAutoPlay to activate, and
UnRegisterAutoplay to disable
void __fastcall TDVDForm::UnRegisterAutoplay()
{
IRunningObjectTable *prot;
if (SUCCEEDED(GetRunningObjectTable(0, &prot)))
{
prot->Revoke(_dwRegisterROT);
prot->Release();
}
}
void __fastcall TDVDForm::RegisterAutoplay()
{
DWORD dwContentType = ARCONTENT_DVDMOVIE;
IMoniker* pMoniker;
HRESULT hr = CreateClassMoniker(g_clsidAutoPlayInterceptor, &pMoniker);
if (SUCCEEDED(hr))
{
IRunningObjectTable* prot;
hr = GetRunningObjectTable(0, &prot);
if (SUCCEEDED(hr))
{
CAutoPlayInterceptor* pQCA = new CAutoPlayInterceptor();
if (pQCA)
{
hr = pQCA->Init(dwContentType);
if (SUCCEEDED(hr))
{
IUnknown* punk;
hr = pQCA->QueryInterface(IID_IUnknown, (void**)&punk);
if (SUCCEEDED(hr))
{
// register
hr = prot->Register(ROTFLAGS_REGISTRATIONKEEPSALIVE,
punk, pMoniker, &_dwRegisterROT);
if (SUCCEEDED(hr))
{
dprintf("Registered!!!");
}
punk->Release();
}
}
pQCA->Release();
}
else
{
hr = E_OUTOFMEMORY;
}
prot->Release();
}
pMoniker->Release();
}
}