ICOPEN

The ICOPEN structure contains information about the data stream being compressed or decompressed, the version number of the driver, and how the driver is used.

typedef struct { 
    DWORD    dwSize; 
    DWORD    fccType; 
    DWORD    fccHandler; 
    DWORD    dwVersion; 
    DWORD    dwFlags; 
    LPRESULT dwError; 
    LPVOID   pV1Reserved; 
    LPVOID   pV2Reserved; 
    DWORD    dnDevNode; 
} ICOPEN; 
 

Members

dwSize

Size, in bytes, of the structure.

fccType

Four-character code indicating the type of stream being compressed or decompressed. Specify "VIDC" for video streams.

fccHandler

Four-character code identifying a specific compressor.

dwVersion

Version of the installable driver interface used to open the driver.

dwFlags

Applicable flags indicating why the driver is opened. The following values are defined:

ICMODE_COMPRESS

Driver is opened to compress data.

ICMODE_DECOMPRESS

Driver is opened to decompress data.

ICMODE_DRAW

Device driver is opened to decompress data directly to hardware.

ICMODE_QUERY

Driver is opened for informational purposes, rather than for compression.

dwFlags

Error return values.

pV1Reserved

Reserved; do not use.

pV2Reserved

Reserved; do not use.

dnDevNode

Device node for plug and play devices.

Remarks

This structure is passed to video capture drivers when they are opened. This allows a single installable driver to function as either an installable compressor or a video capture device. By examining the fccType member of the ICOPEN structure, the driver can determine its function. For example, a fccType value of "VIDC" indicates that it is opened as an installable video compressor.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in vfw.h.
  Import Library: Use vfw32.lib.

See Also

Video Compression Manager Overview, Video Compression Structures