IAMAudioInputMixer::put_MixLevel method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The put_MixLevel method sets the recording level for this input.
Syntax
HRESULT put_MixLevel(
[in] double Level
);
Parameters
[in] Level
Specifies the recording level. The following values are possible.
| Value | Description |
|---|---|
| 0.0 to 1.0 | Zero indicates that the recording level is off; the value 1.0 indicates that the recording level is at full volume. Intermediate values are also allowed. |
| AMF_AUTOMATICGAIN | Enable automatic adjustment of the recording level. |
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Success. |
|
This filter does not support the AMF_AUTOMATICGAIN flag. |
|
Invalid argument. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |