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 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.