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The IDirectSoundCaptureFXAec8 interface is used to set and retrieve parameters on a capture buffer that supports acoustic echo cancellation. This interface requires Microsoft Windows XP or later operating systems.
IDirectSoundCaptureFXAec8 is a define for IDirectSoundCaptureFXAec. The interface names are interchangeable.
This interface is obtained by calling GetObjectInPath on the buffer that supports the effect.
In addition to the methods inherited from IUnknown, the IDirectSoundCaptureFXAec8 interface exposes the following methods.
| Method | Description |
|---|---|
| IDirectSoundCaptureFXAec8::GetAllParameters | The IDirectSoundCaptureFXAec8::GetAllParameters method retrieves the acoustic echo cancellation parameters of a buffer. |
| IDirectSoundCaptureFXAec8::GetStatus | The IDirectSoundCaptureFXAec8::GetStatus method retrieves the status of the effect. |
| IDirectSoundCaptureFXAec8::Reset | The IDirectSoundCaptureFXAec8::Reset method resets the effect to its initial state. |
| IDirectSoundCaptureFXAec8::SetAllParameters | The IDirectSoundCaptureFXAec8::SetAllParameters method sets the acoustic echo cancellation parameters of a buffer. |
The LPDIRECTSOUNDCAPTUREFXAEC8 type is defined as a pointer to the IDirectSoundCaptureFXAec8 interface:
typedef struct IDirectSoundCaptureFXAec8 *LPDIRECTSOUNDCAPTUREFXAEC8;
Operating System: Requires Microsoft WindowsXP or later.
Windows: Important Note for Windows Vista
Existing applications that access Windows XP Acoustic Echo Cancellation (AEC) features via the DirectSound API will no longer obtain AEC when running on Windows Vista. These applications will still run, but their calls to AEC-specific DirectSound API calls will have no effect on the captured audio.
To learn how to obtain AEC in Windows Vista, See the Windows Vista AEC topics in the Windows SDK.