IltmmTargetFormat::HasCacheDialog

#include "ltmm.h"

C Syntax

HRESULT IltmmTargetFormat_HasCacheDialog(pTargetFormat, Dialog, pHasDialog)

C++ Syntax

HRESULT HasCacheDialog(Dialog, pHasDialog)

 

IltmmTargetFormat * pTargetFormat;

/* pointer to an interface */

long Dialog;

/* dialog to show */

VARIANT_BOOL * pHasDialog;

/* pointer to a variable */

Queries whether the specified property dialog for the caching filter is available.

Parameter

Description

pTargetFormat

Pointer to the IltmmTargetFormat interface that references the target format The format to be used for the converted file. This includes the file format, any special settings used by that format, and which audio and/or video codec A COmpressor combined with a DECompressor, or encoder and a decoder, which allows you to both compress and decompress that same data. is to be used for the conversion, and any special settings used by the codecs. object.

Dialog

Value that specifies which dialog to display. Must be one of the ltmmTargetFormat_Dlg Constants.

pHasDialog

Pointer to a variable to be updated with a value that indicates whether the specified property dialog is available. Possible values are:

 

Value

Meaning

 

VARIANT_TRUE

The dialog is available.

 

VARIANT_FALSE

The dialog is not available.

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

Use the IltmmTargetFormat::get_UseFilterCache function to query whether the toolkit is caching filters. It returns the value that was set using the IltmmTargetFormat::put_UserFilterCache. Use the IltmmTargetFormat::put_UseFilterCache function to enable or disable caching for the target format. Use the IltmmTargetFormat::GetCacheObject function to retrieve the caching filter object. Use the IltmmTargetFormat::ShowCacheDialog function to display a specific property dialog for the caching filter. Use the IltmmTargetFormat::HasCacheDialog function to query whether the specified property dialog for the caching filter is available.

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:

IltmmTargetFormat::get_UseFilterCache, IltmmTargetFormat::put_UseFilterCache, IltmmTargetFormat::GetCacheObject IltmmTargetFormat::ShowCacheDialog, IltmmCapture::GetSubObject, IltmmConvert::GetSubObject

Topics:

Multimedia Function Group

Example

For a C example, refer to IltmmTargetFormat::CreateTargetFormats

For a C++ example, refer to IltmmTargetFormat::CreateTargetFormats