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IKsJackDescription::GetJackDescription

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IKsJackDescription::GetJackDescription

The GetJackDescription method gets a description of an audio jack.

HRESULT GetJackDescription(
  UINT  nJack,
  KSJACK_DESCRIPTION  *pDescription
);

Parameters

nJack

[in]  The jack index. If the connection consists of n jacks, the jacks are numbered from 0 to n – 1. To get the number of jacks, call the IKsJackDescription::GetJackCount method.

pDescription

[out]  Pointer to a caller-allocated buffer into which the method writes a structure of type KSJACK_DESCRIPTION that contains information about the jack. The buffer size must be at least sizeof(KSJACK_DESCRIPTION).

Return Value

If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.

Return code Description
E_INVALIDARG Parameter nJack is not a valid jack index.
E_POINTER Pointer pDescription is NULL.

Remarks

When a user needs to plug an audio endpoint device into a jack or unplug it from a jack, an audio application can use the descriptive information that it retrieves from this method to help the user to find the jack. This information includes:

  • The physical location of the jack on the computer chassis or external box.
  • The color of the jack.
  • The type of physical connector used for the jack.
  • The mapping of channels to the jack.

For more information, see KSJACK_DESCRIPTION.

Requirements

Client: Windows Vista

Header: Include Devicetopology.h.

See Also

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