IMediaBuffer::GetBufferAndLength
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4/8/2010
This method retrieves the buffer and the size of the valid data in the buffer.
Syntax
HRESULT GetBufferAndLength(
BYTE** ppBuffer,
DWORD* pcbLength
);
Parameters
- ppBuffer
[out] Address of a pointer that receives the buffer array. The ppBuffer parameter can be NULL if pcbLength is not NULL.
- pcbLength
[out] Pointer to a variable that receives the size of the valid data, in bytes. The pcbLength parameter can be NULL if ppBuffer is not NULL.
Return Value
Returns an HRESULT value. Possible values include the following.
| Value | Description |
|---|---|
S_OK |
Retrieved the requested number of items |
E_POINTER |
NULL pointer argument |
Remarks
Either parameter can be NULL, in which case it does not receive a value. At least one parameter must be non-NULL. If both parameters are NULL, the method returns E_POINTER.
The value returned in the pcbLength parameter is the size of the valid data in the buffer, not the buffer's allocated size. To obtain the buffer's allocated size, call the IMediaBuffer::GetMaxLength method.
Requirements
| Header | dmo.h |
| Library | Dmoguid.lib |
| Windows Embedded CE | Windows CE .NET 4.1 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |