ICLocate

The ICLocate function finds a compressor or decompressor that can handle images with the specified formats, or finds a driver that can decompress an image with a specified format directly to hardware.

HIC ICLocate(
  DWORD fccType,              
  DWORD fccHandler,           
  LPBITMAPINFOHEADER lpbiIn,  
  LPBITMAPINFOHEADER lpbiOut,  
  WORD wFlags                 
);
 

Parameters

fccType

Four-character code indicating the type of compressor or decompressor to open. For video streams, the value of this parameter is "VIDC".

fccHandler

Preferred handler of the specified type. Typically, the handler type is stored in the stream header in an AVI file. Specify NULL if your application can use any handler type or it does not know the handler type to use.

lpbiIn

Address of a BITMAPINFOHEADER structure defining the input format. A compressor handle is not returned unless it supports this format.

lpbiOut

Address of a BITMAPINFOHEADER structure defining an optional decompressed format. You can also specify zero to use the default output format associated with the input format.

If this parameter is nonzero, a compressor handle is not returned unless it can create this output format.

wFlags

Flags that describe the search criteria for a compressor or decompressor. The following values are defined:

ICMODE_COMPRESS

Finds a compressor that can compress an image with a format defined by lpbiIn to the format defined by lpbiOut.

ICMODE_DECOMPRESS

Finds a decompressor that can decompress an image with a format defined by lpbiIn to the format defined by lpbiOut.

ICMODE_DRAW

Finds a decompressor that can decompress an image with a format defined by lpbiIn and draw it directly to hardware.

ICMODE_FASTCOMPRESS

Has the same meaning as ICMODE_COMPRESS except the compressor is used for a real-time operation and emphasizes speed over quality.

ICMODE_FASTDECOMPRESS

Has the same meaning as ICMODE_DECOMPRESS except the decompressor is used for a real-time operation and emphasizes speed over quality.

Return Values

Returns a handle to a compressor or decompressor if successful or zero otherwise.

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 Functions, BITMAPINFOHEADER