Partager via

IEnumMediaTypes::Next

  • Article

This method retrieves the specified number of items in the enumeration sequence.

HRESULT Next(
  ULONG cMediaTypes,
  AM_MEDIA_TYPE** ppMediaTypes,
  ULONG* pcFetched
);

Parameters

  • cMediaTypes
    [in] Number of media types to place.
  • ppMediaTypes
    [out] Array in which to place the pointers to the next media type.
  • pcFetched
    [out] Actual count passed.

Return Values

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.
S_OK or NOERROR Success.

Remarks

To use this method, pass an array of pointers to media types. (If you want only a single media type, you can pass a pointer to a media type pointer in place of an array of media type pointers.) The interface allocates the necessary AM_MEDIA_TYPE structures and initializes them with the variable format block. Free each media type by calling DeleteMediaType, which will free the format block and the media type itself.

Requirements

DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header:

Last updated on Wednesday, April 13, 2005

© 2005 Microsoft Corporation. All rights reserved.