ICDECOMPRESS structure

The ICDECOMPRESS structure contains decompression parameters used with the ICM_DECOMPRESS message.

Syntax


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

Members

dwFlags

Applicable flags. The following values are defined:

NameDescription
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_NOTKEYFRAME

Current frame is not a key frame.

ICDECOMPRESS_NULLFRAME

Current frame does not contain data and the decompressed image should be left the same.

ICDECOMPRESS_PREROLL

Current frame precedes the point in the movie where playback starts and, therefore, will not be drawn.

ICDECOMPRESS_UPDATE

Screen is being updated or refreshed.

 

lpbiInput

Pointer to a BITMAPINFOHEADER structure containing the input format.

lpInput

Pointer to a buffer containing the input data.

lpbiOutput

Pointer to a BITMAPINFOHEADER structure containing the output format.

lpOutput

Pointer to a buffer where the driver should write the decompressed image.

ckid

Chunk identifier from the AVI file.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Vfw.h

See also

Video Compression Manager
Video Compression Structures
BITMAPINFOHEADER
ICM_DECOMPRESS

 

 

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