ICM_COMPRESS_GET_SIZE message
The ICM_COMPRESS_GET_SIZE message requests that the video compression driver supply the maximum size of one frame of data when compressed into the specified output format. You can send this message explicitly or by using the ICCompressGetSize macro.
ICM_COMPRESS_GET_SIZE
wParam = (DWORD_PTR) (LPVOID) lpbiInput;
lParam = (DWORD_PTR) (LPVOID) lpbiOutput;
Parameters
-
lpbiInput
-
Pointer to a BITMAPINFO structure containing the input format.
-
lpbiOutput
-
Pointer to a BITMAPINFO structure containing the output format.
Return Value
Returns the maximum number of bytes a single compressed frame can occupy.
Remarks
Typically, applications send this message to determine how large a buffer to allocate for the compressed frame.
The driver should calculate the size of the largest possible frame based on the input and output formats.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows 2000 Professional [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|