EDataFlow Enumeration

The EDataFlow enumeration defines constants that indicate the direction in which audio data flows between an audio endpoint device and an application.

Syntax

typedef enum __MIDL___MIDL_itf_mmdeviceapi_0000_0000_0001
{
    eRender = 0,
    eCapture = (eRender+1),
    eAll = (eCapture+1),
    EDataFlow_enum_count = (eAll+1)
} EDataFlow;

Remarks

The IMMDeviceEnumerator::GetDefaultAudioEndpoint, IMMDeviceEnumerator::EnumAudioEndpoints, IMMEndpoint::GetDataFlow, and IMMNotificationClient::OnDefaultDeviceChanged methods use the constants defined in the EDataFlow enumeration.

Constants

Constant	Description
eRender	Audio rendering stream. Audio data flows from the application to the audio endpoint device, which renders the stream.
eCapture	Audio capture stream. Audio data flows from the audio endpoint device that captures the stream, to the application.
eAll	Audio rendering or capture stream. Audio data can flow either from the application to the audio endpoint device, or from the audio endpoint device to the application.
EDataFlow_enum_count	The number of members in the EDataFlow enumeration (not counting the EDataFlow_enum_count member).

Requirements

Header: Declared in mmdeviceapi.h.

Library: Use MMDevApi.lib.