IDirectSoundCaptureFXAec8
[The feature associated with this page, DirectSound, is a legacy feature. It has been superseded by WASAPI and Audio Graphs. Media Casting have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Media Casting instead of DirectSound, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
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.
IDirectSoundCaptureFXAec8 Members
| 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;
Info
Operating System: Requires Microsoft WindowsXP or later.
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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. |