ICM_COMPRESS_GET_SIZE

	Overview

	Group

	Quick Info

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.

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
BITMAPINFO, ICCompressGetSize

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