118 Commits

Author SHA1 Message Date
Harald Alvestrand
9e334b7d99 Remove channel_manager.h from most .h files
This ensures that only the compilation units that actually need
ChannelManager details can see it.

Bug: webrtc:13931
Change-Id: Iddd37580c0ceceba5b7095e84b981e6a525b2800
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/261200
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36762}
2022-05-04 16:35:17 +00:00
Harald Alvestrand
8f42992787 Move channel creation functions into RtpTransceiver
This breaks the link from sdp_offer_answer.cc to channel.h.

Bug: webrtc:13931
Change-Id: I75608f75713bf4e69013ac5f5b17c19e53d07519
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/261060
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36757}
2022-05-04 11:57:50 +00:00
Henrik Boström
0a16276290 Restore FiredDirection and maybe fire OnTrack in Rollback.
Prior to this CL, rollback did not restore FiredDirection and remote
streams were only sometimes restored. This resulted in not firing
ontrack if a track was rolled back and then added again on the same
transceiver.

Rollback also never performed OnTrack, which is incorrect because a
transceiver that goes from sendrecv to inactive will cause OnRemoveTrack
and if this is rolled back (so we become sendrecv again) then we need
OnTrack to fire.

This CL improves rollback's "memory", fires ontrack in Rollback() and
adds test coverage.

Needed to solve similar bugs in the Chromium layers as well:
https://chromium-review.googlesource.com/c/chromium/src/+/3613313

Bug: chromium:1320669
Change-Id: I655dd7d8a6b86080fe0e7c32c9e8c6434062ae91
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/260330
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36734}
2022-05-02 18:07:24 +00:00
Harald Alvestrand
3af79d1768 Move ownership of the Channel class to RTCRtpTransceiver
This makes the channel manager object into a factory, not a manager.

Bug: webrtc:13931
Change-Id: I59f7d818a739797a7c0a7a32e6583450834df122
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/260467
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36718}
2022-04-30 19:21:11 +00:00
Harald Alvestrand
19ebabc904 Separate setting a cricket::Channel from clearing the channel.
This makes it clearer which modules set the channel.
Also remove GetChannel() from PeerConnection public API

This was only used once, internally, and can better be inlined.
Part of reducing the exposure of Channel.

Bug: webrtc:13931
Change-Id: I5f44865230a0d8314d269c85afb91d4b503e8de0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/260187
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36695}
2022-04-28 14:19:16 +00:00
Harald Alvestrand
65685a65f2 Move pc/channel.h to only be used in .cc files
This is an implementation API, user classes should in principle
only use the channel_interface.h

Bug: webrtc:13931
Change-Id: I85c285217858dc087c90a50792e980f731f4439f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/260185
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36674}
2022-04-27 17:13:11 +00:00
Henrik Boström
a8ad11de82 [Rollback] Don't end tracks when transceiver is still in use.
Prior to this CL, calling RtpTransceiver::SetChannel() with null
arguments would cause the receiver's track to end. This is wrong,
because the channel can be nulled for other reasons than the transceiver
being stopped/removed - such as when the transceiver is rolled back but
still in use. Also, stopping a transceiver will end the track, so we
should simply ensure to always stop the transceiver when that is needed.

This CL makes sure that the transceiver is stopped or stopping in all
appropriate places, allowing us to remove the ability to end the source
for any other reason. A side-effect of this is that:
- The track never ends prematurely, fixing https://crbug.com/1315611.
- Removed transceivers are always stopped, fixing
  https://crbug.com/webrtc/14005.

This CL fixes the issue of track being ended in the ontrack event when
running https://jsfiddle.net/henbos/nxebusjm/.
- We don't have WPT test coverage for this, so I'll add that separately.

With SetSourceEnded() removed, some stopping/stop in response to
rejecting locally SDP munged content had to be added in order not to
regress the existing test coverage for this:
*PeerConnectionInterfaceTest.RejectMediaContent/1

Bug: chromium:1315611, webrtc:14005.
Change-Id: I21f30a1259e51324066dc84f72a72485b9e0fadc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/260180
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36669}
2022-04-27 11:57:52 +00:00
Niels Möller
afb246b5a9 Update pc/ to not use implicit conversion from scoped_refptr<T> to T*.
Bug: webrtc:13464
Change-Id: I768646af8ded6338ef51486b8d69db1ad71e9a2c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/259500
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36588}
2022-04-20 13:18:33 +00:00
Jonas Oreland
6c7f98472e WebRTC-DeprecateGlobalFieldTrialString/Enabled/ - part 16/inf
This cl/ adds the feature actually injecting a FieldTrialsView into
PeerConnectionFactory, or into a PeerConnection or both.

The field trials used for a PeerConnection is those specified in
PeerConnectionDependencies. Otherwise will those from
PeerConnectionFactoryDependencies be used (and until we're finished with
this conversion, the global string fallback is used as last resort).

Note that it is currently not possible to create 2 FieldTrials
objects concurrently...due to global string,
so this cl/ is mostly (but entirely) for show, i.e one _can_
realistically inject them into a PeerConnectionFactory.


Bug: webrtc:10335
Change-Id: Id2e60525f48a1f8293c1dd0be771e3ed03790963
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258134
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36578}
2022-04-20 06:35:27 +00:00
Henrik Boström
ed57873196 Default screencast_min_bitrate_kps to 100 kbps.
See go/deprecating-media-constraints for motivation.

Setting this min bitrate is necessary for BWE to work properly when
sending screencast in low BW scenarios. The value 100 kbps appears to be
a sensible default in practise (this is the value used by Google Meet).
In order for apps not to have to rely on non-standard APIs
(googScreencastMinBitrate) for BWE to work properly, we change the
default to 100 kbps. This will unblock deprecating and removing legacy
mediaConstraints.

A kill switch is added in case this causes any unforeseen issues, but if
all goes well we can remove the kill switch in the next milestone.

Bug: chromium:1315155
Change-Id: I02b4eb0dfb26f934e678760313a0423f412512c8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258681
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36523}
2022-04-11 12:59:57 +00:00
Harald Alvestrand
09bdd95b3e Remove some dependencies that aren't needed
This was a side effect of testing out the "gn_check_autofix.py" tool
after running "apply-iwyu -r" on a few files.
Seems worth committing.

Bug: none
Change-Id: I3df446c640d4c4e3d6b15eddbdf66a1a40135f69
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258024
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36446}
2022-04-05 14:55:39 +00:00
Jonas Oreland
ed99dae422 WebRTC-DeprecateGlobalFieldTrialString/Enabled/ - part 1
This cl/
1) move WebRtcKeyValueConfig from api/transport to api/ directory.
2) add a test/ScopedKeyValueConfig (compare ScopedFieldTrials).
3) removes usage of webrtc::field_trial:: from the pc/ directory.
4) removes a few unused includes of system_wrappers/field_trial.h.

Bug: webrtc:10335
Change-Id: If29c07900dbe791050b0a5ad05332bedfad035f2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/253903
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36160}
2022-03-09 13:23:21 +00:00
Henrik Boström
f08e2663aa Delete kAlwaysAllowPayloadTypeDemuxingFieldTrialName flag.
This flag was used as a kill switch in case turning off payload type
demuxing in some Unified Plan cases (https://crbug.com/webrtc/12814)
would cause any issues. That landed way back in M93 and no issues were
ever reported, so time to clean up the flag.

Bug: webrtc:12814
Change-Id: I1970936131384dc0be1cd118e6b0ac877b8c289c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/253240
Auto-Submit: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36109}
2022-03-02 10:11:58 +00:00
Harald Alvestrand
981c572eab Updated apply-iwyu to autogenerate compile_commands.json
Also deleted iwyu script that was not maintained, and deleted
some options that made the script more complex.

Bug: none
Change-Id: I39d8eaa37f12c72ddc127ae145e6a3a80f328316
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/251384
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35966}
2022-02-09 14:30:57 +00:00
Harald Alvestrand
bc32c56f83 Move pc.transport_controller_ to be network thread only
A pointer to the transport controller is now maintained on
both the network thread and the signaling thread. We use
thread specific accessors to make it explicit which copy we
are accessing at any given time.

We also move the initial offerer value to the SDP offer/answer
class; this is determined on the basis of SDP offer/answer, so
there is no need to hop to the network thread for that.

Work in progress.

Bug: webrtc:9987
Change-Id: Idbe5a7fbf44f667adcd119e486133cf6e43ab1f5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/251382
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35965}
2022-02-09 13:06:15 +00:00
Harald Alvestrand
8e3441933f Break out sdp_offer_answer from peerconnection
Bug: webrtc:13634
Change-Id: I4400c4d1a6aaf751774dbd8a9f697fd9fee1d297
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/251324
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35954}
2022-02-08 15:23:44 +00:00
Harald Alvestrand
66c4036d1b Access threads from SdpOfferAnswerHandler via ConnectionContext
This removes a couple of methods from the PeerConnectionSdpMethods
interface.

Bug: webrtc:11995
Change-Id: I0a68178b1f0a99e779e6d7f94d03b493d811f500
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249794
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35841}
2022-01-31 09:22:08 +00:00
Harald Alvestrand
5b66130209 Refactor PeerConnectionInternal to break SdpOfferAnswer dependency
This CL changes the SdpOfferAnswerHandler class to depend on a new class
PerConnectionInternalMethods, which is implemented by PeerConnection.
This means that SdpOfferAnswerHandler no longer depends on
PeerConnectionInterface.

This opens the way for refactoring PeerConnection so that
PeerConnectionInternalMethods is a member object (encapsulation not
inheritance), which will make it possible to break some of the
dependency cycles that make the "peerconnection" target in the BUILD
file so huge.

Bug: webrtc:11995
Change-Id: Ib8413a31c0148b8d8602764b7367dfd3068da58a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249785
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35828}
2022-01-28 15:18:36 +00:00
Tomas Gunnarsson
16de21696a Delete channel objects asynchronously from the transceiver.
Move deletion of channel objects over to the RtpTransceiver instead
of having it done by SdpOfferAnswer.

The deletion is now also done via PostTask rather than Invoke.

Bug: webrtc:11992, webrtc:13540
Change-Id: I5aff14956d5e572ca8816bbfef8739bb609b4484
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/248170
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35798}
2022-01-26 10:39:00 +00:00
Henrik Boström
347488e450 Make AddIceCandidate's error type match the spec.
See https://crbug.com/webrtc/4409.

Bug: webrtc:4409
Change-Id: I4249444a385ac7c4b3da88125a0d7c88a88bceeb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/248143
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35767}
2022-01-24 09:04:10 +00:00
Tomas Gunnarsson
5411b174c8 Add a channel factory interface.
The interface is implemented by the ChannelManager and contains methods
to create and destroy media channel objects as used by a transceiver.

This will subsequently allow us to delete the channel objects from
the transceiver class where ownership really lies rather than from
the outside - which is currently required by some tests that keep
channel objects on the stack. We'll furthermore be able to do the
destruction asynchronously without additional Invoke()s as we do now
which will remove an Invoke when making sdp changes.

With introducing the interface, the following simplifications were made:
* ChannelManager constructed on the signaling thread.
  Before, there was an Invoke in the context class, which existed
  for the purposes of calling MediaEngine::Init() (which in turn is
  only needed for the VoiceEngine). This Invoke has now been moved
  into the CM (more tbd).
* The CM now has a pointer to the signaling thread (since that's the
  construction thread). That allows us to remove the signaling thread
  parameter from the CreateFooChannel methods.
* The ssrc_generator (UniqueRandomIdGenerator) instance for SSRCs moved
  from SdpOfferAnswerHandler to the CM, as it's always used in
  combination with the CM. This simplifies the CreateFooChannel methods
  as well as a couple of other classes that have a CM dependency.
* Removed DestroyFooChannel related code from SdpOfferAnswerHandler since
  the channel type detail can be taken care of by the CM.

Bug: webrtc:11992, webrtc:13540
Change-Id: I04938a803734de8489ba31e6212d9eaecc244126
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/247904
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35766}
2022-01-24 08:50:30 +00:00
Tomas Gunnarsson
4f8a58c3d2 Remove 2 Invokes to the network thread when creating a channel.
...and one when destroying a channel object.

This CL removes Init_n() and Deinit_n() from the BaseChannel class.
Channel classes now use SetRtpTransport to do initialization and
uninitialization on the network thread.

Notably if an implementation has called SetRtpTransport() with a valid
transport pointer, it is required that SetRtpTransport be called again
with a nullptr before the channel object can be deleted.

In situations where multiple channels are created, this can mean
a substantial reduction in thread hops. We still hop to the worker
in order to construct the objects - this can probably be avoided
and SetChannel() is still a synchronous operation for the transceivers.
Furthermore, teardown of channel objects also still happens
synchronously and across network/worker/signaling threads.

Bug: webrtc:11992
Change-Id: I68ca7596e181fc82996e3e290733d97381aa5e78
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/246740
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35738}
2022-01-19 12:17:47 +00:00
Tomas Gunnarsson
0dd7539ca7 Split ApplyRemoteDescription up into smaller functions.
This is a followup to [1] that moves parts of the SetRemoteDescription
operation into a subclass of SdpOfferAnswerHandler.

[1] https://webrtc-review.googlesource.com/c/src/+/244980/

Bug: webrtc:13540
Change-Id: Ic5d97f9bfd30763f3988f2f6832703ffb819a51d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245641
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35714}
2022-01-17 19:10:34 +00:00
Tomas Gunnarsson
1933d3b677 Move network thread invokes for initialization for media channels, out.
Remove Init_w and Deinit(), both of which were wrappers around Invoke()
calls from the worker thread to the network thread.

Instead, replace them with Init_n() and Deinit_n() that are currently*
required to be called by external code in order to associate/disassociate
the channels with the transport.

This CL mostly moves things around in order to prepare for upcoming
changes, but it does change channel destruction in the following way:
- When destroying channels, we don't block the worker thread anymore
  while uninitialization happens on the network thread. Previously
  both signal and worker threads were blocked during the
  uninitialization in the ChannelManager.

* In an upcoming CL, Init_n() and Deinit_n() will be called internally
  from a different method that's always called on the network thread
  when a channel is associated/disassociated with a transceiver. When
  we're there, we will have removed several invokes that currently are
  a part of constructing/destructing channel objects.

Bug: webrtc:11992
Change-Id: Ibc30447a40749ceb36d37834b0cfc5c5ea60e895
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/246502
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35707}
2022-01-17 14:06:42 +00:00
Harald Alvestrand
70fe704588 Remove support for obsolete histogram KeyProtocolByMedia
Bug: chromium:1274679
Change-Id: I076e52d42f2e7f3d69c600ec8960150715ce4c05
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/246103
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35681}
2022-01-13 11:45:18 +00:00
Tomas Gunnarsson
1c7c09bcfa Introduce SdpOfferAnswerHandler::RemoteDescriptionOperation.
This is an operation specific subclass of SdpOfferAnswerHandler that in
this first step, takes over the implementation details that before this
CL were implemented in SdpOfferAnswerHandler::DoSetRemoteDescription.

This CL does not change the behavior of the implementation but it does
break up DoSetRemoteDescription into smaller methods and moves the state
related to the SRD operation, into a class that in upcoming steps can
be passed around asynchronously as needed, which will allow us to avoid
blocking threads.

Bug: webrtc:13540
Change-Id: Id2002d2390a4a13725f5967df5b82064b37c7490
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/244980
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35669}
2022-01-12 14:38:25 +00:00
Tommi
c811ab54eb Invalidate the legacy stats cache instead of updating.
This changes SetLocalDescription/SetRemoteDescription to just resetting
the internal cache timestamp for the legacy stats handler instead of
performing a full update, which can be costly.

Bug: webrtc:13557
Change-Id: I93971dbd7abf33c0d0f2836f9c17ba4550f41a00
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245645
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35661}
2022-01-11 20:45:16 +00:00
Tomas Gunnarsson
651586c4e1 Move a part of ApplyRemoteDescription() into a separate function.
This part is specific to unified plan and doesn't need most of
the state related to the remote description (and doesn't return an
error).

Bug: none
Change-Id: I0de66bdb2e925072a6d9010e4444e75d4574ae04
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245102
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Auto-Submit: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35642}
2022-01-07 19:50:46 +00:00
Tomas Gunnarsson
b625edfa47 Move one part of ApplyRemoteDescription out to a separate function.
This is just a step to reduce the size of ApplyRemoteDescription to make
refactoring it easier (and ultimately support async operations).

Bug: none
Change-Id: Idb950c35f585a887d6640278b6edfdd0c7cec3fa
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245101
Auto-Submit: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35641}
2022-01-07 18:23:06 +00:00
Tomas Gunnarsson
d908d74fac Make error param non-optional when setting local/remote content.
This is a slight refactoring while doing some other changes, so not
strictly necessary, but the error param is always supplied in practice
so it made sense to update the tests to reflect that, test that error
values are reported in (at least) some cases and remove the additional
code that checks for whether or not error information is requested.

Bug: none
Change-Id: Ia5739a18ea2beb6970eabf9d809c24dfa43466b1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/244097
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35632}
2022-01-05 11:59:14 +00:00
Niels Möller
e7cc8830ef Update pc/ to not use implicit T* --> scoped_refptr<T> conversion
Bug: webrtc:13464
Change-Id: I729ec2306ec0d6df2e546b5dbb530f57065d60da
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/244090
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35623}
2022-01-04 16:19:33 +00:00
Tomas Gunnarsson
92f9b74df7 Refactor UpdatePayloadTypeDemuxingState and add documentation.
This simplifies the work that happens on the worker thread in
preparation of avoiding having to go to the worker at all.

Bug: webrtc:11993
Change-Id: I13f063bdecce8efdb978ef1976c819019f30e020
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/244082
Auto-Submit: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35610}
2022-01-03 10:43:32 +00:00
Philipp Hancke
063bb384f8 sdp: temporarily raise mid limit to 32
to avoid breaking existing deployments. Also measure usage.

BUG=webrtc:12517

Change-Id: Ic38f1b45e79e46da9ff6fe927b0c5351443ccd96
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/239188
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/main@{#35445}
2021-11-30 21:05:51 +00:00
Artem Titov
d3251968d1 Prepare to rename RTC_NOTREACHED to RTC_DCHECK_NOTREACHED
Add implementation of RTC_DCHECK_NOTREACHED equal to the RTC_NOTREACHED.
The new macros will replace the old one when old one's usage will be
removed. The idea of the renaming to provide a clear signal that this
is debug build only macros and will be stripped in the production build.

Bug: webrtc:9065
Change-Id: I4c35d8b03e74a4b3fd1ae75dba2f9c05643101db
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237802
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35348}
2021-11-15 21:44:59 +00:00
Philipp Hancke
187e9d4927 sdp: limit mid length to 16 bytes
which is the maxium length allowed by one-byte header extensions

BUG=webrtc:12517

Change-Id: I003105d3566a34b5b7affb84ffe69b7705973ee3
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237400
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/main@{#35333}
2021-11-11 09:33:33 +00:00
Harald Alvestrand
0d018415d5 Revert "Remove code supporting the SDES crypto mode in SDP"
This reverts commit ee212a72f220641f0a4a23fb2c1bd600a9069440.

Reason for revert: Don't remove until downstream issues resolved

Original change's description:
> Remove code supporting the SDES crypto mode in SDP
>
> Removes the ability to accept nonencrypted answers to encrypted offers.
> Fixes some logic around bundled sessions and requirement for
> transport parameters.
>
> Bug: webrtc:11066
> Change-Id: I56d8628d223614918a1e5260fdb8a117c8c02dbd
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/236344
> Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Niels Moller <nisse@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#35298}

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: webrtc:11066
Change-Id: I0c400ceffe1b08e0be7b44abbb54c8a032128f05
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237223
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35312}
2021-11-04 14:46:27 +00:00
Harald Alvestrand
ee212a72f2 Remove code supporting the SDES crypto mode in SDP
Removes the ability to accept nonencrypted answers to encrypted offers.
Fixes some logic around bundled sessions and requirement for
transport parameters.

Bug: webrtc:11066
Change-Id: I56d8628d223614918a1e5260fdb8a117c8c02dbd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/236344
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35298}
2021-11-02 12:58:50 +00:00
Harald Alvestrand
31b03e9d50 Add static AsString functions for PeerConnectionInterface enums
Changes one preexisting enum-to-string function to use the new format.

Also changes the RTC_LOG macros that created collisions with ToString,
for tidiness, and documents the recommended function form.

Bug: webrtc:13272
Change-Id: Ic8bb54ed31402ba32675b142d796cf276ee78df5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/235722
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35296}
2021-11-02 12:29:50 +00:00
Harald Alvestrand
e61d4c83ef Return proxied object in OnTransceiver
This makes it possible to invoke methods on the transceiver object
from any thread.

Also makes a few of the mock observer objects thread-safe, to allow
testing when the main thread is not the signaling thread.

Bug: webrtc:13183
Change-Id: Ic97efef71a21c3075700a028103061032f8d2bcc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/232120
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35010}
2021-09-16 09:40:52 +00:00
Niels Möller
b7aac6f5f4 Update SdpOfferAnswerHandler to use rtc::make_ref_counted
Also change return type of FinalRefCountedObject::Release() to
RefCountReleaseStatus, for consistency with other refcount classes.

Bug: webrtc:12701
Change-Id: I37c325e78ba7ae3e220b618da02cb243604ca4cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/229590
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#34849}
2021-08-25 11:00:12 +00:00
Taylor Brandstetter
8591eff520 Reland "Fix bug where we assume new m= sections will always be bundled."
This is a reland of commit 704a834f685eb96c9fcf891ca345557bef4d138a,
after it was reverted in order to merge a CL to M93.

Original change's description:
> Fix bug where we assume new m= sections will always be bundled.
>
> A recent change [1] assumes that all new m= sections will share the
> first BUNDLE group (if one already exists), which avoids generating
> ICE candidates that are ultimately unnecessary. This is fine for JSEP
> endpoints, but it breaks the following scenarios for non-JSEP endpoints:
>
> * Remote offer adding a new m= section that's not part of any BUNDLE
>   group.
> * Remote offer adding an m= section to the second BUNDLE group.
>
> The latter is specifically problematic for any application that wants
> to bundle all audio streams in one group and all video streams in
> another group when using Unified Plan SDP, to replicate the behavior of
> using Plan B without bundling. It may try to add a video stream only
> for WebRTC to bundle it with audio.
>
> This is fixed by doing some minor re-factoring, having BundleManager
> update the bundle groups at offer time.
>
> Also:
> * Added some additional validation for multiple bundle groups in a
>   subsequent offer, since that now becomes relevant.
> * Improved rollback support, because now rolling back an offer may need
>   to not only remove mid->transport mappings but alter them.
>
> [1]: https://webrtc-review.googlesource.com/c/src/+/221601
>
> Bug: webrtc:12906, webrtc:12999
> Change-Id: I4c6e7020c0be33a782d3608dee88e4e2fceb1be1
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225642
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34544}

Bug: webrtc:12906, webrtc:12999
Change-Id: Id6acab2e2d7430c65f4b6a1d7372388a70cc18ab
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228465
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34728}
2021-08-11 23:36:28 +00:00
Artem Titov
cfea2182f8 Use backticks not vertical bars to denote variables in comments
Bug: webrtc:12338
Change-Id: I89c8b3a328d04203177522cbdfd9e606fd4bce4c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228246
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34696}
2021-08-10 10:40:03 +00:00
Taylor Brandstetter
b92f9856b5 Revert "Reland "Fix bug where we assume new m= sections will always be bundled.""
This reverts commit 704a834f685eb96c9fcf891ca345557bef4d138a.

Reason for revert: Reverting this in order to revert
https://webrtc-review.googlesource.com/c/src/+/221601, so we can
merge that revert to M93.

Original change's description:
> Reland "Fix bug where we assume new m= sections will always be bundled."
>
> This is a reland of d2b885fd91909f1b17fb11292a8c989d5d883b22, after
> making sure transports that are just being kept alive in case of
> rollback don't contribute to connection state, which broke a WPT.
>
> Original change's description:
> > Fix bug where we assume new m= sections will always be bundled.
> >
> > A recent change [1] assumes that all new m= sections will share the
> > first BUNDLE group (if one already exists), which avoids generating
> > ICE candidates that are ultimately unnecessary. This is fine for JSEP
> > endpoints, but it breaks the following scenarios for non-JSEP endpoints:
> >
> > * Remote offer adding a new m= section that's not part of any BUNDLE
> >   group.
> > * Remote offer adding an m= section to the second BUNDLE group.
> >
> > The latter is specifically problematic for any application that wants
> > to bundle all audio streams in one group and all video streams in
> > another group when using Unified Plan SDP, to replicate the behavior of
> > using Plan B without bundling. It may try to add a video stream only
> > for WebRTC to bundle it with audio.
> >
> > This is fixed by doing some minor re-factoring, having BundleManager
> > update the bundle groups at offer time.
> >
> > Also:
> > * Added some additional validation for multiple bundle groups in a
> >   subsequent offer, since that now becomes relevant.
> > * Improved rollback support, because now rolling back an offer may need
> >   to not only remove mid->transport mappings but alter them.
> >
> > [1]: https://webrtc-review.googlesource.com/c/src/+/221601
> >
> > Bug: webrtc:12906, webrtc:12999
> > Change-Id: I4c6e7020c0be33a782d3608dee88e4e2fceb1be1
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225642
> > Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> > Reviewed-by: Henrik Boström <hbos@webrtc.org>
> > Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#34544}
>
> Bug: webrtc:12906, webrtc:12999
> Change-Id: I68bf988b1918dd2d51de76e53e4fd696fea5a09b
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227120
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34596}

TBR=hta@webrtc.org

Bug: webrtc:12906, webrtc:12999
Change-Id: I129d9eb3b9831317fa24b0263db191027246cb99
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227821
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34666}
2021-08-06 19:53:09 +00:00
Mirko Bonadei
9ff450d0c4 [sigslot] - Remove sigslot from MediaStreamObserver.
Bug: webrtc:11943
Change-Id: Icf91ce850913c26e45dbca1940cafd600c235ad4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227340
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34632}
2021-08-03 06:53:59 +00:00
Artem Titov
880fa8169b Reland "Use backticks not vertical bars to denote variables in comments for /pc"
Original change's description:
> Revert "Use backticks not vertical bars to denote variables in comments for /pc"
>
> This reverts commit 37ee0f5e594dd772ec6d620b5e5ea8a751b684f0.
>
> Reason for revert: Revert in order to be able to revert https://webrtc-review.googlesource.com/c/src/+/225642
>
> Original change's description:
> > Use backticks not vertical bars to denote variables in comments for /pc
> >
> > Bug: webrtc:12338
> > Change-Id: I88cf10afa5fc810b95d2a585ab2e895dcc163b63
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226953
> > Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> > Commit-Queue: Artem Titov <titovartem@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#34575}
>
> TBR=hta@webrtc.org,titovartem@webrtc.org,webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com
>
> Change-Id: I5eddd3a14e1f664bf831e5c294fbc4de5f6a88af
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: webrtc:12338
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227082
> Reviewed-by: Björn Terelius <terelius@webrtc.org>
> Commit-Queue: Björn Terelius <terelius@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34577}

Bug: webrtc:12338
Change-Id: I96bd229b73613c162d11d75fa4f5934e1b4295c7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227087
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34611}
2021-07-30 22:13:59 +00:00
Taylor Brandstetter
704a834f68 Reland "Fix bug where we assume new m= sections will always be bundled."
This is a reland of d2b885fd91909f1b17fb11292a8c989d5d883b22, after
making sure transports that are just being kept alive in case of
rollback don't contribute to connection state, which broke a WPT.

Original change's description:
> Fix bug where we assume new m= sections will always be bundled.
>
> A recent change [1] assumes that all new m= sections will share the
> first BUNDLE group (if one already exists), which avoids generating
> ICE candidates that are ultimately unnecessary. This is fine for JSEP
> endpoints, but it breaks the following scenarios for non-JSEP endpoints:
>
> * Remote offer adding a new m= section that's not part of any BUNDLE
>   group.
> * Remote offer adding an m= section to the second BUNDLE group.
>
> The latter is specifically problematic for any application that wants
> to bundle all audio streams in one group and all video streams in
> another group when using Unified Plan SDP, to replicate the behavior of
> using Plan B without bundling. It may try to add a video stream only
> for WebRTC to bundle it with audio.
>
> This is fixed by doing some minor re-factoring, having BundleManager
> update the bundle groups at offer time.
>
> Also:
> * Added some additional validation for multiple bundle groups in a
>   subsequent offer, since that now becomes relevant.
> * Improved rollback support, because now rolling back an offer may need
>   to not only remove mid->transport mappings but alter them.
>
> [1]: https://webrtc-review.googlesource.com/c/src/+/221601
>
> Bug: webrtc:12906, webrtc:12999
> Change-Id: I4c6e7020c0be33a782d3608dee88e4e2fceb1be1
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225642
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34544}

Bug: webrtc:12906, webrtc:12999
Change-Id: I68bf988b1918dd2d51de76e53e4fd696fea5a09b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227120
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34596}
2021-07-30 00:02:53 +00:00
Björn Terelius
dc364e5bc2 Revert "Fix bug where we assume new m= sections will always be bundled."
This reverts commit d2b885fd91909f1b17fb11292a8c989d5d883b22.

Reason for revert: Speculative revert for Chromium importer

Original change's description:
> Fix bug where we assume new m= sections will always be bundled.
>
> A recent change [1] assumes that all new m= sections will share the
> first BUNDLE group (if one already exists), which avoids generating
> ICE candidates that are ultimately unnecessary. This is fine for JSEP
> endpoints, but it breaks the following scenarios for non-JSEP endpoints:
>
> * Remote offer adding a new m= section that's not part of any BUNDLE
>   group.
> * Remote offer adding an m= section to the second BUNDLE group.
>
> The latter is specifically problematic for any application that wants
> to bundle all audio streams in one group and all video streams in
> another group when using Unified Plan SDP, to replicate the behavior of
> using Plan B without bundling. It may try to add a video stream only
> for WebRTC to bundle it with audio.
>
> This is fixed by doing some minor re-factoring, having BundleManager
> update the bundle groups at offer time.
>
> Also:
> * Added some additional validation for multiple bundle groups in a
>   subsequent offer, since that now becomes relevant.
> * Improved rollback support, because now rolling back an offer may need
>   to not only remove mid->transport mappings but alter them.
>
> [1]: https://webrtc-review.googlesource.com/c/src/+/221601
>
> Bug: webrtc:12906, webrtc:12999
> Change-Id: I4c6e7020c0be33a782d3608dee88e4e2fceb1be1
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225642
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34544}

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: webrtc:12906, webrtc:12999
Change-Id: I00179d7573f322ad539ff16cad1f85320cfb2270
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227081
Reviewed-by: Björn Terelius <terelius@google.com>
Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org>
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34578}
2021-07-28 00:11:43 +00:00
Björn Terelius
fd05d6f504 Revert "Use backticks not vertical bars to denote variables in comments for /pc"
This reverts commit 37ee0f5e594dd772ec6d620b5e5ea8a751b684f0.

Reason for revert: Revert in order to be able to revert https://webrtc-review.googlesource.com/c/src/+/225642

Original change's description:
> Use backticks not vertical bars to denote variables in comments for /pc
>
> Bug: webrtc:12338
> Change-Id: I88cf10afa5fc810b95d2a585ab2e895dcc163b63
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226953
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Commit-Queue: Artem Titov <titovartem@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#34575}

TBR=hta@webrtc.org,titovartem@webrtc.org,webrtc-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I5eddd3a14e1f664bf831e5c294fbc4de5f6a88af
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:12338
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227082
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34577}
2021-07-27 22:10:24 +00:00
Artem Titov
37ee0f5e59 Use backticks not vertical bars to denote variables in comments for /pc
Bug: webrtc:12338
Change-Id: I88cf10afa5fc810b95d2a585ab2e895dcc163b63
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226953
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34575}
2021-07-27 20:52:02 +00:00
Taylor Brandstetter
d2b885fd91 Fix bug where we assume new m= sections will always be bundled.
A recent change [1] assumes that all new m= sections will share the
first BUNDLE group (if one already exists), which avoids generating
ICE candidates that are ultimately unnecessary. This is fine for JSEP
endpoints, but it breaks the following scenarios for non-JSEP endpoints:

* Remote offer adding a new m= section that's not part of any BUNDLE
  group.
* Remote offer adding an m= section to the second BUNDLE group.

The latter is specifically problematic for any application that wants
to bundle all audio streams in one group and all video streams in
another group when using Unified Plan SDP, to replicate the behavior of
using Plan B without bundling. It may try to add a video stream only
for WebRTC to bundle it with audio.

This is fixed by doing some minor re-factoring, having BundleManager
update the bundle groups at offer time.

Also:
* Added some additional validation for multiple bundle groups in a
  subsequent offer, since that now becomes relevant.
* Improved rollback support, because now rolling back an offer may need
  to not only remove mid->transport mappings but alter them.

[1]: https://webrtc-review.googlesource.com/c/src/+/221601

Bug: webrtc:12906, webrtc:12999
Change-Id: I4c6e7020c0be33a782d3608dee88e4e2fceb1be1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225642
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Taylor Brandstetter <deadbeef@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34544}
2021-07-23 22:08:00 +00:00