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CoreAudioDevices.CountGet method

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Remarks

 

After having enumerated the list of available audio endpoint devices through the CoreAudioDevices.Enum method, obtains the number of enumerated audio endpoint devices for a specific data flow (playback or recording).

 

This method is only intended for usage with Windows Vista and later versions: further information about management of audio devices in Windows Vista and later versions can be found inside the How to access settings of audio devices in Windows Vista and later versions tutorial.

For further details about methods related to the management of core audio devices refer to the CoreAudioDevices COM object.

 

 

Syntax

 

[Visual Basic]

control.CoreAudioDevices.CountGet (

nDataFlow as enumCoreAudioDataFlows,

nDevicesCount as Integer

) as enumErrorCodes


 

[C++]

short control.CoreAudioDevices.CountGet (

short nDataFlow,

short *nDevicesCount

);


 

Parameter

Description

 

 

nDataFlow

Direction in which audio data flows between an audio endpoint device and an application.

Supported values are the following:

Mnemonic Value

Value

Meaning

DEVICE_DATA_FLOW_RENDER

0

Audio rendering stream. Audio data flows from the application to the audio endpoint device, which renders the stream

DEVICE_DATA_FLOW_CAPTURE

1

Audio capture stream. Audio data flows from the audio endpoint device that captures the stream, to the application.

nDevicesCount

Reference that, on return from the method call, will contain the number of audio endpoint devices for the given type of data flow.

 

 

Return value

 

Value

Meaning

 

 

Negative value

An error occurred, check the LastError property value in order to get the error code

enumErrorCodes.ERR_NOERROR (0)

The method call was successful