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CoreAudioDevices.RenderPartChannelCountGet method

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Remarks

 

Obtains the number of channels of a part embedded inside the given render audio endpoint device.

 

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.RenderPartChannelCountGet (

nDeviceIndex as Integer,

nPartId as enumCoreAudioRenderParts,

nChannelsCount as Integer

) as enumErrorCodes


 

[C++]

short control.CoreAudioDevices.RenderPartChannelCountGet (

short nDeviceIndex,

short nPartId,

short *nChannelsCount

);


 

Parameter

Description

 

 

nDeviceIndex

Zero-based index of the render audio endpoint device. The total number of render audio endpoint devices can be obtained through the CoreAudioDevices.CountGet method passing DEVICE_DATA_FLOW_RENDER to the nDataFlow parameter.

nPartId

Identifier of the render part.

Supported values are the following:

Mnemonic Value

Value

Meaning

RENDER_PART_CD_AUDIO

0

CD Audio

RENDER_PART_MIC

1

Microphone

RENDER_PART_LINEIN

2

Line In

nChannelsCount

Reference that, on return from the method call, will contain the number of channels of the part. The returned value is 0 if the requested part is unsupported by the render audio endpoint device.

 

 

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