IFileSourceFilter::Load

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This method loads a media file.

Syntax

HRESULT Load(
  LPCOLESTR pszFileName,
  const AM_MEDIA_TYPE* pmt
);

Parameters

• pszFileName
  [in] Absolute path of the file to open.

• pmt
  [in] Media type of the file. This can be NULL.

Return Value

Returns an HRESULT value that depends on the implementation.

HRESULT can be one of the following standard constants or other values not listed.

Remarks

This is an initialization method for the interface. It is not designed to load multiple files, and calls to this method after the first call fail.

Implement this method to load the file specified by pszFileName.

The name in pszFileName need not be a disk file name (that is, one you could pass to the Win32 CreateFile function, for example). It could also be a URL name. The URL moniker filter uses IFileSourceFilter to retrieve its URL name, and IGraphBuilder::AddSourceFilter (and hence IGraphBuilder::RenderFile) handles this correctly.

IGraphBuilder::AddSourceFilter returns a specific error (ERROR_FILE_NOT_FOUND) upon not finding the file, which indicates that the file specified does not exist, not that the filter does not exist.

Requirements