MFCreateMediaBufferWrapper Function
Creates a media buffer that wraps an existing media buffer. The new media buffer points to the same memory as the original media buffer, or to an offset from the start of the memory.
Syntax
HRESULT MFCreateMediaBufferWrapper(
__in IMFMediaBuffer *pBuffer,
__in DWORD cbOffset,
__in DWORD dwLength,
__out IMFMediaBuffer **ppBuffer
);
Parameter
pBuffer [in]
A pointer to the IMFMediaBuffer interface of the original media buffer.cbOffset [in]
The start of the new buffer, as an offset in bytes from the start of the original buffer.dwLength [in]
The size of the new buffer. The value of cbOffset + dwLength must be less than or equal to the size of valid data the original buffer. (The size of the valid data is returned by the IMFMediaBuffer::GetCurrentLength method.)ppBuffer [out]
Receives a pointer to the IMFMediaBuffer interface. The caller must release the interface.
Rückgabewert
The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Rückgabecode | Beschreibung |
|---|---|
| S_OK | The function succeeded. |
| E_INVALIDARG | The requested offset or the requested length is not valid. |
Hinweise
The maximum size of the wrapper buffer is limited to the size of the valid data in the original buffer. This might be less than the allocated size of the original buffer. To set the size of the valid data, call IMFMediaBuffer::SetCurrentLength.
This function is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:
- Windows XP mit Service Pack 2 (SP2) und höher.
- Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (Oktober 2006 Updaterollup für Windows XP Media Center Edition) installed.
Anforderungen
Mindestens unterstützter Client |
Windows Vista |
Mindestens unterstützter Server |
Windows Server 2008 |
Header |
Mfapi.h |
Bibliothek |
Mfplat.lib |
DLL |
Mfplat.dll |