The IDirectSound3DBuffer::SetMode method sets the operation mode for 3-D sound processing.
HRESULT SetMode(
DWORD dwMode,
DWORD dwApply
);
Parameters
dwMode
Flag specifying the 3-D sound processing mode to be set.
DS3DMODE_DISABLE
Processing of 3-D sound is disabled. The sound seems to originate from the center of the listener's head.
DS3DMODE_HEADRELATIVE
Sound parameters (position, velocity, and orientation) are relative to the listener's parameters. In this mode, the absolute parameters of the sound are updated automatically as the listener's parameters change, so that the relative parameters remain constant.
DS3DMODE_NORMAL
Normal processing. This is the default mode.
dwApply
Value indicating when the setting should be applied. This value must be one of the following:
| DS3D_DEFERRED | Settings are not applied until the application calls the IDirectSound3DListener::CommitDeferredSettings method. This allows the application to change several settings and generate a single recalculation. |
| DS3D_IMMEDIATE | Settings are applied immediately, causing the system to recalculate the 3-D coordinates for all 3-D sound buffers. |
Return Values
If the method succeeds, the return value is DS_OK.
If the method fails, the return value may be DSERR_INVALIDPARAM.