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IWMDMDevice2::GetFormatSupport2

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The GetFormatSupport2 method retrieves the formats supported by the device, including audio and video codecs, and MIME file formats.

Syntax

HRESULT GetFormatSupport2(DWORDdwFlags,_WAVEFORMATEX**ppAudioFormatEx,UINT*pnAudioFormatCount,_VIDEOINFOHEADER**ppVideoFormatEx,UINT*pnVideoFormatCount,WMFILECAPABILITIES**ppFileType,UINT*pnFileTypeCount);

Parameters

dwFlags

[in]  DWORD specifying audio formats, video formats, and MIME types. This flag specifies what the application is requesting the service provider to fill in. The caller can set one or more of the following three values.

Value Description
WMDM_GET_FORMAT_SUPPORT_AUDIO Service provider should fill in audio parameters.
WMDM_GET_FORMAT_SUPPORT_VIDEO Service provider should fill in video parameters.
WMDM_GET_FORMAT_SUPPORT_FILE Service provider should fill in file parameters.

ppAudioFormatEx

[out]  Pointer to an array of _WAVEFORMATEX structures specifying information about audio codecs and bit rates supported by the device. The memory for this parameter is allocated by Windows Media Device Manager, and must be released by the caller with the Win32 function CoTaskMemFree.

pnAudioFormatCount

[out]  Pointer to an integer specifying the audio format count.

ppVideoFormatEx

[out]  Pointer to an array of _VIDEOFORMATEX structures specifying information about video codes and formats supported by the device. The memory for this parameter is allocated by Windows Media Device Manager, and must be released by the caller with the Win32 function CoTaskMemFree.

pnVideoFormatCount

[out]  Pointer to an integer specifying the video format count.

ppFileType

[out]  Pointer to an array of WMFILECAPABILITIES file-type objects. The memory for this parameter is allocated by Windows Media Device Manager, and must be released by the caller with the Win32 function CoTaskMemFree.

pnFileTypeCount

[out]  Pointer to an integer specifying the file-type count.

Return Values

The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:

  • Standard COM error codes
  • Windows error codes converted to HRESULT values
  • Windows Media Device Manager error codes

For an extenstive list of possible error codes, see Error Codes.

Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK The method succeeded.
E_FAIL An unspecified error occurred.

Remarks

This method extends IWMDMDevice::GetFormatSupport to handle video formats. The recommended method for getting format support, however, is IWMDMDevice3::GetFormatCapability. If GetFormatCapability isn't supported, the device will probably not support video, and GetFormatSupport is probably sufficient.

Requirements

Header: Defined in mswmdm.h.

Library: mssachlp.lib

See Also