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 is to be used for the conversion, and any special settings used by the codecs.

A COmpressor combined with a DECompressor, or encoder and a decoder, which allows you to both compress and decompress that same data.

IltmmTargetFormat::HasCacheDialog

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#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 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.

Platforms

Win32, x64

Elements:	IltmmTargetFormat::get_UseFilterCache, IltmmTargetFormat::put_UseFilterCache, IltmmTargetFormat::GetCacheObject IltmmTargetFormat::ShowCacheDialog, IltmmCapture::GetSubObject, IltmmConvert::GetSubObject
Topics:	Multimedia Function Group