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The DataFlow enumeration indicates the data-flow direction of an audio stream through a connector.
Syntax
typedef enum __MIDL___MIDL_itf_devicetopology_0000_0000_0011 {
In = 0,
Out
} DataFlow;
Constants
InValue: 0 Input stream. The audio stream flows into the device through the connector. |
OutOutput stream. The audio stream flows out of the device through the connector. |
Remarks
The IConnector::GetDataFlow method uses the constants defined in the DataFlow enumeration.
The topology of a rendering or capture device on an audio adapter typically has one or more connectors with a data-flow direction of "In" through which audio data enters the device, and one or more connectors with a data-flow direction of "Out" through which audio data exits the device. For example, a typical rendering device on an adapter has a connector with data-flow direction "In" through which the Windows audio engine streams PCM data into the device. The same device has a connector with data-flow direction "Out" through which the device transmits an audio signal to speakers or headphones.
The topology of a rendering endpoint device (for example, headphones) has a single connector with data-flow direction "In" through which audio data (in the form of an analog signal) enters the device.
The topology of a capture endpoint device (for example, a microphone) has a single connector with data-flow direction "Out" through which audio data exits the device.
For more information, see Device Topologies.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2008 [desktop apps only] |
| Header | devicetopology.h |