IDirectDrawVideoPort::GetInputFormats

  • 项目

This method retrieves the input formats supported by the DirectDrawVideoPort object.

HRESULT GetInputFormats(
  LPDWORD lpNumFormats, 
  LPDDPIXELFORMAT lpFormats, 
  DWORD dwFlags
);

Parameters

  • lpNumFormats
    Address of a variable containing the number of entries that the array at lpFormats can hold. If this number is less than the total number of codes, the method fills the array with as many codes as will fit, sets the value at lpNumFormats to indicate the total number of codes, and returns DDERR_MOREDATA.
  • lpFormats
    Address of an array of DDPIXELFORMAT structures that will be filled in with the input formats supported by this DirectDrawVideoPort object. If this parameter is NULL, the method sets lpNumFormats to the number of supported formats, and then returns DD_OK.
  • dwFlags
    Flags specifying the part of the video signal for which formats will be enumerated. The following table shows the possible flags.
    Flag Description
    DDVPFORMAT_VIDEO Returns formats for the video data.
    DDVPFORMAT_VBI Returns formats for the VBI data.

Return Values

If the method succeeds, the return value is DD_OK.

If the method fails, the return value may be one of the following error values:

DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_MOREDATA

Remarks

This method can also be used to return the number of formats supported. To do this, set the lpFormats parameter to NULL. When the method returns, the variable at lpNumFormats contains the total number of supported input formats.

Requirements

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Dvp.h.
Link Library: Ddraw.lib.

 Last updated on Thursday, April 08, 2004

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