ICDECOMPRESS

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

The ICDECOMPRESS structure is used with the ICM_DECOMPRESS message to specify the parameters for decompressing the data.

Members

dwFlags

Specifies applicable flags. The following flags are defined:

Flag	Meaning
ICDECOMPRESS_HURRYUP	Indicates the data is just buffered and not drawn to the screen. Use this flag for the fastest decompression.
ICDECOMPRESS_UPDATE	Indicates the screen is being updated.
ICDECOMPRESS_PREROLL	Indicates this frame is not drawn because it is prior to the point in the movie where play begins.
ICDECOMPRESS_NULLFRAME	Indicates this frame does not have any data, and the decompressed image should be left the same.
ICDECOMPRESS_NOTKEYFRAME	Indicates that this frame is not a key frame.

lpbiInput

Specifies a pointer to a BITMAPINFOHEADER structure containing the input format.

lpInput

Specifies a pointer to a data buffer containing the input data.

lpbiOutput

Specifies a pointer to a BITMAPINFOHEADER structure containing the output format.

lpOutput

Specifies a pointer to a data buffer where the driver should write the decompressed image.

ckid

Specifies the chunk ID from the AVI file.