In some scenarios, there's no need for the browser to apply such audio filters. For example, when user's microphone already does audio filtering (echo cancellation, noise supression ...).
This commit doens't change the current behavior (filters still follow browser's default config): admins need to uncomment/set these values if disabling/enabling specific filters if desired.
This is related to #4873
Video provider's service for local stream control was wrongly setting the disconnected
state when a multiple webcam user tried to stop a single cam. The `stopVideo` method
was inconsistent when called multiple times for the same `cameraId`.
Included a better testing scope for event dispatching and disconnected state handling.
It seems the video-preview generic error fallback locale (to handle unexpected errors on our side which do not inherently come from gUM calls) was removed by accident. Adding it back.
Some browsers seem to (occasionally) not return the getUserMedia promise call and the
user gets stuck in this state unable to share her/his webcam.
Since enumerateDevices still works even on a gUM rejection this includes a racing
timeout that skips gUM. Configured at settings `gUMTimeout`.
Reproduced with Windows 10 Chrome 87.
The first getUserMedia was not supposed to be considered critical to the whole
video preview flow.
Scenarios where the user has multiple media sources and one of them was already
in use or had some malfunction problem were forcing a global skip at the video
preview modal even if one of them was available to be used.
Audio client logs already cover audio session progress the way we need.
This avoids keepAlive and other unnecessary messages to be logged in browser's console.
If setting is not present, default value is set to false.
This was added as an option (websocketKeepAliveInterval), which is the interval to send keep alive messages.
Setting websocketKeepAliveInterval to 0 disables the keep alive, producing the same old behavior.
This helps avoid websocket disconnection due to socket inactivity, preventing it to unnecessarily reconnect.
Also, sometimes reconnect fails and error 1005 is triggered.
Fixes problems reported in #10985.
Also reduces occurrences of error 1005.
