ICDECOMPRESS

typedef struct {
    DWORD dwFlags;
    LPBITMAPINFOHEADER lpbiInput;
    LPVOID lpInput;
    LPBITMAPINFOHEADER lpbiOutput;
    LPVOID lpOutput;
    DWORD ckid;
} ICDECOMPRESS;

Contains decompression parameters used with the ICM_DECOMPRESS message.

dwFlags

Applicable flags. The following values are defined:

ICDECOMPRESS_HURRYUP	Tries to decompress at a faster rate. When an application uses this flag, the driver should buffer the decompressed data but not draw the image.
ICDECOMPRESS_UPDATE	Indicates the screen is being updated or refreshed.
ICDECOMPRESS_PREROLL	Indicates the current frame precedes the point in the movie where playback starts and, therefore, will not be drawn.
ICDECOMPRESS_NULLFRAME	Indicates the current frame does not contain data and the decompressed image should be left the same.
ICDECOMPRESS_NOTKEYFRAME	Indicates the current frame is not a key frame.

lpbiInput

Address of a BITMAPINFOHEADER structure containing the input format.

lpInput

Address of a data buffer containing the input data.

lpbiOutput

Address of a BITMAPINFOHEADER structure containing the output format.

lpOutput

Address of a data buffer where the driver should write the decompressed image.

ckid

Chunk identifier from the AVI file.