| Microsoft DirectX 9.0 |
The GetInternalCompBufferInfo method called after the pins are connected, retrieving compressed buffer information given the connected type.
Syntax
HRESULT GetInternalCompBufferInfo(
LPDWORD pdwNumTypesCompBuffers,
LPAMVACompBufferInfo pamvaCompBufferInfo
);
Parameters
pdwNumTypesCompBuffers
[in] [out] Pointer to a variable of type DWORD. If pamvaCompBufferInfo is not NULL, this parameter receives the number of uncompressed buffer types. Otherwise, on input this parameter specifies the maximum number of compressed buffer types to return, and on output receives the actual number of compressed buffer types.
pamvaCompBufferInfo
[out] If non-NULL, then up to pdwNumTypesCompBuffers AMVACompBufferInfo structures are returned. This data includes the width, height, pixel format, and DirectDraw capabilities to be used to create the surface and the size in bytes the surface will occupy.
Return Values
Returns an HRESULT value that depends on the implementation of the interface. HRESULT can include one of the following standard constants, or other values not listed.
| Return code | Description |
| E_FAIL | Failure. |
| E_INVALIDARG | Argument is invalid. |
| E_NOTIMPL | Method is not supported. |
| E_POINTER | Null pointer argument. |
| S_OK | Success. |
Remarks
A video accelerator driver may support multiple compressed buffer types (for instance, video accelerator data and Inverse Discrete Cosine Transfer [IDCT] data.)
See Also