IltmmMemory::GetData

Summary

Retrieves a block of data from the objects buffer.

Syntax

#include "ltmm.h"

Language Syntax
C HRESULT IltmmMemory_getData(pMem, Index, Count, pVal)
C++ HRESULT GetData(Index, Count, pVal)

Parameters

IltmmMemory *pMem

Pointer to an IltmmMemory interface.

long Index

Index, or offset, from which to retrieve the data from the objects buffer.

long Count

Size of the data to retrieve (number of elements, in bytes).

VARIANT *pVal

Pointer to a variable to be updated with a VARIANT containing a SAFEARRAY reference to the block of data.

Returns

Value Meaning
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

If the size of the data to retrieve is larger than the size available after the offset, the function will retrieve only the available data between the offset and the end of the buffer.

This function allocates the required memory for the SAFEARRAY; the caller is responsible for freeing it.

The area of the object's buffer from which the data is retrieved will be locked for the duration of the call.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Functions

Topics

Example

Language Example
C Use ltmmMemory for Memory Conversion
C++ Use ltmmMemory for Memory Conversion
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