ICM_COMPRESS_GET_SIZE
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) (LPVOID) lpbiInput;
lParam = (DWORD) (LPVOID) lpbiOutput;
Parameters
lpbiInput
Address of a BITMAPINFO structure containing the
input format.
lpbiOutput
Address of a BITMAPINFO
structure containing the output format.
Return Values
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.
See Also