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WASAPI.DeviceChannelsGet method

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Remarks

 

Obtains the number of channels for the given WASAPI device.

 

This method is only intended for usage with Windows Vista and later versions.

For further details about the use of WASAPI see the WASAPIMan class and the How to manage audio flow through WASAPI tutorial

 

 

Syntax

 

[Visual Basic]

Public Function DeviceChannelsGet (

nDeviceIndex as Int32,

nDeviceType as enumWasapiDeviceTypes,

nChannelsCount as Int32

) as enumErrorCodes


 

[C#]

public enumErrorCodes DeviceChannelsGet (

Int32 nDeviceIndex,

enumWasapiDeviceTypes nDeviceType,

ref Int32 nChannelsCount

);


 

[C++]

public: enumErrorCodes DeviceChannelsGet (

Int32 nDeviceIndex,

enumWasapiDeviceTypes nDeviceType,

Int32 __gc  *nChannelsCount

);


 

 

Parameter

Description

 

 

nDeviceIndex

Number representing the zero-based index of the WASAPI device of interest. The total number of available WASAPI devices can be obtained using the WASAPI.DeviceGetCount method.

nDeviceType

The type of device.

Supported values are the following:

Mnemonic Value

Value

Meaning

WASAPI_DEVICE_TYPE_RENDER

0

Audio rendering device.

WASAPI_DEVICE_TYPE_CAPTURE

1

Audio capture device.

WASAPI_DEVICE_TYPE_LOOPBACK

2

Audio loopback device.

nChannelsCount

Reference that, on return from the method call, will contain the number of channels for the given device.

 

 

Return value

 

Value

Meaning

 

 

Negative value

An error occurred (see the LastError property for further error details)

enumErrorCodes.NOERROR (0)

The method call was successful.