#include "ltmm.h"
C Syntax |
HRESULT IltmmTargetFormat_put_UseFilterCache(pTargetFormat, newVal) |
C++ Syntax |
HRESULT put_UseFilterCache(newVal) |
IltmmTargetFormat * pTargetFormat; |
/* pointer to an interface */ |
VARIANT_BOOL newVal; |
/* flag */ |
Enables or disables the caching of 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 |
Flag that indicates whether to enable or disable the caching of filters. Possible values are: |
|
|
Value |
Meaning |
|
VARIANT_TRUE |
Enable the caching of filters. |
|
VARIANT_FALSE |
Disable the caching of 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
This function will force the toolkit to preload and reuse the filters specified for the particular format. Calling the IltmmTargetFormat::put_UserFilterCache function with VARIANT_TRUE will enable caching for this target format. If there is not a currently created object, then it will create it. Setting this function to VARIANT_FALSE will disable the caching for this target object. If an object is already created, it will destroy it.
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::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. |
Win32, x64
See Also
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.