IltmmTVTuner::get_SignalPresent

#include "ltmm.h"

C Syntax

HRESULT IltmmTVTuner__get_SignalPresent(pTV, pVal)

C++ Syntax

HRESULT get_SignalPresent(pVal)

 

IltmmTVTuner *pTV;

/* pointer to an interface */

long *pVal;

/* pointer to a variable */

Gets a value that indicates whether a signal is present on the current channel.

Parameter

Description

pTV

Pointer to an IltmmTVTuner interface.

pVal

Pointer to a variable to be updated with a value that indicates whether a signal is present on the current channel.  Possible values are:

 

Value

Meaning

 

ltmmTUNER_HASNOSIGNALSTRENGTH

The signal strength cannot be determined now.

 

ltmmTUNER_NOSIGNAL

No signal detected.

 

ltmmTUNER_SIGNALPRESENT

Signal detected.

Returns

S_OK

The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

For more detailed information, refer to the Microsoft documentation for IAMTuner::SignalPresent at http://msdn.microsoft.com/archive/default.asp?url=/library/en-us/directshow/htm/iamtunersignalpresent.asp.

Required DLLs and Libraries

LTMM

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Elements:

IltmmTVTuner::SetChannel, IltmmTVTuner::get_Channel

Topics:

Multimedia Function Group

Example

For a C example, refer to IltmmTVTuner::get_SignalPresent Example for C.

For a C++ example, refer to IltmmTVTuner::get_SignalPresent Example for C++.