IltmmTargetFormat::get_UseFilterCache

#include "ltmm.h"

C Syntax

HRESULT IltmmTargetFormat_get_UseFilterCache(pTargetFormat, pVal)

C++ Syntax

HRESULT get_UseFilterCache(pVal)

 

IltmmTargetFormat * pTargetFormat;

/* pointer to an interface */

VARIANT_BOOL *pVal;

/* pointer to a variable */

Queries whether the toolkit is currently caching filters.

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.

pVal

Pointer to a variable to be updated with a value that indicates whether the toolkit is caching filters. Possible values are:

 

Value

Meaning

 

VARIANT_TRUE

The toolkit is caching filters.

 

VARIANT_FALSE

The toolkit is not caching filters. This is the default value.

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 currently caching filters. It returns the value that was set using the IltmmTargetFormat::put_UserFilterCache function. 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::ShowCacheDialogfunction 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.

Platforms

Win32, x64

See Also

Elements:

IltmmTargetFormat::put_UseFilterCache, IltmmTargetFormat::GetCacheObject, IltmmTargetFormat::HasCacheDialog, 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::put_UseFilterCache.

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

For a C++ example, refer to IltmmTargetFormat::put_UseFilterCache.