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Audio state callback and remote media setup both depend on FS's state
(comes through Meteor) and the ICE state (local, peer connection). The
caveat: FS's state can come delayed on reconnection scenarios because
Meteor's websocket generally takes significantly longer to re-connect than
the peer connection, which means the ICE state gets completed way before FS
is flagged as ready.
The practical issue: while outbound audio (client -> FS) will work, inbound
audio (FS -> client) won't _just because it wasn't played_ (even though
data is coming through).
This commit decouples the remote media setup step from the state
through:
- Setup remote media when ICE state is completed
- Run the state callback only after FS is flagged as ready. This
should maintain the UI states consistent across client-server.
Keep in mind the assumption that if FS is ready, ICE is completed by
consequence.
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There's a scenario where remote streams won't be attached again if the
sharer experienced a Meteor/client disconnection.
The disconnection empties some necessary user data temporarily, which
causes the corresponding video-list-item to be unmounted while the peer
persists for a little longer.
If the sharer re-connects fast enough, video-list-item will re-mount but
will 1) miss the current stream state (ie stuck in loading) 2) fail to
re-attach the streams since the peer was already flagged as attached.
Ensure remote camera streams are always attached and shown by:
- always propagating the current stream state on attachment
- refactoring the attachment pre-requisites away from a static boolean
to a required data + diff check (based on target and current
attached streams)
Firefox does not support selecting an audio output device in its default
configuration. This works around this flaw by just displaying default
output instead of no device found.
Fixes#16057
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There's a very rare scenario where the client may crash if a video
publisher is released before the source stream had its inactivation
listener callback set up.
This adds a type check to the inactivation handler before trying to
clean it up.
In peer.js offer generation method, the provided constraitns are only
being type checked. It needs a value check when the constraint is a
boolean.
This commit should prevent useless transceivers from being added when
explictly specifying audio/video as `false`
There's an edge case in finnicky networks where ALG-like firewalls
tamper with USE-CANDIDATE STUN packets and, consequently, bork ICE-lite
connectivity establishment. The odd part is that client-side gathering
seems to complete if intermediate STUN bindings work (before the final
USE-CANDIDATE), which may cause the peer not to generate relay
candidates == connectivity fails.
This adds the `public.kurento.gatheringTimeout` option to forcefully extend
the candidate gathering window in peers that act as offerers. The
behavior is as follows: if the flag is set (ms), the peer will wait
either the gathering completed stage or, _at most_,
public.kurento.gatheringTimeout ms before proceeding with calls chained
to setLocalDescription.
This option is disabled by default and intentionally ommited from the
base settings.yml file as to not encourage its use. Don't use it unless
you know what you're doing :).
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This is a workaround to the conflict that is happening when an user tries to
download the slide when dark mode is enabled. There is a conflict between
dark mode's styles and the html-to-image lib. To temporarily prevent this from
happening, the dark mode is disabled before downloading the slide, and then
re-enabled when the download is complete.
In order to be able to enable and disable dark mode from another component than
the App, all the dark mode switch logic was extracted into the service of the
app component.
Output device changes aren't working in 2.6's echo test when artifical delay
is on due to the fact that the feedback audio is being played via the WebAudio
context rather the the HTMLMediaElement. Since output device change works
via HTMLMediaElement's setSinkId, it's basically a no-op.
This commit fixes the issue by piping the AudioContext destination
through the main audio element rather than using WebAudio directly for
playback. An additional stub media element (muted) is added to circumvent one
of Chrome's WebAudio issue.
The alternative would be to use AudioContext's setSinkId, but it isn't
supported by Firefox (setSinkId enabled) and Chrome < 110.
This should work with FF (setSinkId enabled) and a wide array of Chromium
versions.
There are still a bunch of edge cases and issues with reconnection
scenarios for video:
- Signaling socket refuses to reconnect once maxRetries expire
- Race conditions on local stream attachment: local camera wouldn't be
correctly rendered _if_ the attached stream existed _without_ video
tracks yet
- Video tracks leak on local streams when replacing them (virtual bgs)
- Completely ignoring Meteor state when trying to reconnect cameras
- Streams aren't proactively stopped when the signaling socket dies
- Outbound request queues aren't isolated by stream nor are they
flushed when a newer peer with the same ID is created
- Server originated negotiation errors won't trigger a local peer
cleanup - thus leaving dangling peers that take way too long to
reconnect
This commit fixes or improves all of the aforementioned issues, +:
- Remove unused arguments in the peer (client->SFU) 'start' request
- Prevent crashes when trying to render video-list-items without user
data (which might happen on re-connections)
Reconnection timers are far too long for abrupt failures because we
are waiting the original timeouts to elapse (30-60s) before trying it
again - even if a connection worked N-sessions back in that session's
history. The ideal thing to have is another intermediate, smaller and
fixed reconnection timer for sessions that had a working screen share
at least once.
The UI is also not being updated to the reconnecting state on negotiation
failures.
* Add an intermediate reconnection timer for abrupt failures set to 8s.
This should improve reconnection times.
* Lower default connection timers values (base 20s down from 30s, max
25s down from 60s)
* Set screen share UI to reconnecting on abrupt failures as well - we
were only tracking ICE states prior to this, not negotiation errors
The media monitor responsible for triggering the reconnecting view in
the screen sharing component was maintaing the previous state (eg
flowing) in cases where the peer just failed before media stopped
flowing. That triggered an error in the bps calculations that caused the
previous state to be preserved - eg stuck in flowing while it should be
not_flowing.
These changes make it so that if there's not peer to fetch stats from,
them the bps calculations will correctly return 0 (which translates to
not_flowing).
The reconnect routine is stopping for viewers if a broker cannot
re-connect in the first try. That is wrong: viewers should try to
reconnect as long as there'sigaling data that mandates so.
The reconnect trigger is changed from broker's started attribute to the
presence of a scheduled reconnection timeout - if there isn't one (not
schedule), always re-schedule it.
Same rationale as in video-provider's commit
(34fa37ae4f092af4a5aef0cf01d96c033d97473c).
This commit does the following:
- Implement actual heartbeat checks to trigger reconnects when
necessary
- Properly catch and log WebSocket.send errors
video-provider's current ping-pong is as good as nothing in 2.5+. We
were counting on Meteor's (and consequently the component's mount state)
before 2.5 to act as a "heartbeat" as far as the socket is concerned.
The ping-pong served only to sustain traffic for finnicky,
traffic-dependant firewall.
Since 2.5, the component's state is _kind of_ detached from Meteor's -
which means it won't unmount when Meteor disconnects. That causes the
video-provider websocket to lose its borrowed heartbeat and leads to a
bunch of reconnectiong inconsistencies, the worst of them being a stuck,
useless signaling socket that will cause cameras not to work until a
client refresh.
This commit does the following:
- Implements actual heartbeat checks to trigger signaling socket
reconnects when necessary, all within the scope of video-provider
- Remove borked, eons old 'offline'/'online' event handlers: they were
causing unnecessary camera drops AND causing video-provider to
generate a stuck signaling socket
- Properly catch WebSockets.send errors
The stream state change handler in video-list-item is using a component
state reference inside a DOM event callback - which means it is always
presuming `isStreamHealthy` is false (initial value). That prevents the
health state from actually transitioning when necessary (and
consequently rendering the reconnecting view in video-list item).
This commit removes the state-based transition check in the state change
handler and unifies the reconnecting view to use the username
placeholde (replacing the loading spinners).
Cursor position was desynced after the presenter zoomed with ctrl+scroll, also fixes the last position of the cursor not being sent sometimes.
Move the throttle to the service call so it is considered in all cases (and there was already a throttle there).
