ICCompressGetSize macro (vfw.h)

The ICCompressGetSize macro requests that the video compression driver supply the maximum size of one frame of data when compressed into the specified output format. You can use this macro or explicitly call the ICM_COMPRESS_GET_SIZE message.

Syntax

DWORD ICCompressGetSize(
     hic,
     lpbiInput,
     lpbiOutput
);

Parameters

hic

Handle to a compressor.

lpbiInput

Pointer to a BITMAPINFO structure containing the input format.

lpbiOutput

Pointer to a BITMAPINFO structure containing the output format.

Return value

Type: DWORD

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

See also

Video Compression Macros

Video Compression Manager