The MediaTrackConstraints
dictionary's autoGainControl
property is a ConstrainBoolean
describing the requested or mandatory constraints placed upon the value of the autoGainControl
constrainable property.
If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.autoGainControl
as returned by a call to MediaDevices.getSupportedConstraints()
. However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.
Automatic gain control is typically a feature provided by microphones, although it can be provided by other input sources as well.
Syntax
var constraintsObject = { autoGainControl: constraint }; constraintsObject.autoGainControl = constraint;
Value
If this value is a simple true
or false
, the user agent will attempt to obtain media with automatic gain control enabled or disabled as specified, if possible, but will not fail if this can't be done. If, instead, the value is given as an object with an exact
field, that field's Boolean value indicates a required setting for the automatic gain control feature; if it can't be met, then the request will result in an error.
Example
See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.
Specifications
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'autoGainControl' in that specification. |
Candidate Recommendation | Initial specification. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
autoGainControl | Chrome Full support Yes | Edge Full support ≤79 | Firefox
Full support
55
| IE No support No | Opera Full support Yes | Safari ? | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android
Full support
55
| Opera Android ? | Safari iOS ? | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.