ICM_COMPRESS

The ICM_COMPRESS message notifies a video compression driver to compress a frame of data into an application-defined buffer.

ICM_COMPRESS 
wParam = (DWORD) (LPVOID) &icc; 
lParam = sizeof(ICCOMPRESS); 
 

Parameters

icc

Address of an ICCOMPRESS structure. The following members of this structure specify the compression parameters: lpbiInput, lpInput, lpbiOutput, lpOutput, lpbiPrev, lpPrev, lpckid, lpdwFlags, dwFrameSize, and dwQuality.

The driver should also use the biSizeImage member of the BITMAPINFOHEADER structure associated with lpbiOutput of ICCOMPRESS to return the size of the compressed frame.

lParam

Size, in bytes, of ICCOMPRESS.

Return Values

Returns ICERR_OK if successful or an error otherwise.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in vfw.h.

See Also

Video Compression Manager Overview, Video Compression Messages, BITMAPINFOHEADER, ICCOMPRESS