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Reland "Reland "Allows FEC generation after pacer step.""

Browse Source 
This is a reland of 19df870d924662e3b6efb86078d31a8e086b38b5
Patchset 1 is the original.
Subsequent patchset changes threadchecker that crashed with downstream
code.

Original change's description:
> Reland "Allows FEC generation after pacer step."
>
> This is a reland of 75fd127640bdf1729af6b4a25875e6d01f1570e0
>
> Patchset 2 contains a fix. Old code can in factor call
> RtpRtcpImpl::FetchFec(). It should only be a noop since deferred fec
> is not supported there - we shouldn't crash.
>
> Original change's description:
> > Allows FEC generation after pacer step.
> >
> > Split out from https://webrtc-review.googlesource.com/c/src/+/173708
> > This CL enables FEC packets to be generated as media packets are sent,
> > rather than generated, i.e. media packets are inserted into the fec
> > generator after the pacing stage rather than at packetization time.
> >
> > This may have some small impact of performance. FEC packets are
> > typically only generated when a new packet with a marker bit is added,
> > which means FEC packets protecting a frame will now be sent after all
> > of the media packets, rather than (potentially) interleaved with them.
> > Therefore this feature is currently behind a flag so we can examine the
> > impact. Once we are comfortable with the behavior we'll make it default
> > and remove the old code.
> >
> > Note that this change does not include the "protect all header
> > extensions" part of the original CL - that will be a follow-up.
> >
> > Bug: webrtc:11340
> > Change-Id: I3fe139c5d53968579b75b91e2612075451ff0f5d
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177760
> > Commit-Queue: Erik Språng <sprang@webrtc.org>
> > Reviewed-by: Sebastian Jansson <srte@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#31558}
>
> Bug: webrtc:11340
> Change-Id: I2ea49ee87ee9ff409044e34a777a7dd0ae0a077f
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177984
> Commit-Queue: Erik Språng <sprang@webrtc.org>
> Reviewed-by: Sebastian Jansson <srte@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#31613}

Bug: webrtc:11340
Change-Id: Ib741c8c284f523c959f8aca454088d9eee7b17f8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/178600
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31619}
This commit is contained in:
Erik Språng
2020-07-02 17:41:32 +02:00
committed by Commit Bot
parent d154e36d96
commit 1d50cb61d8
22 changed files with 434 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
modules/rtp_rtcp/source/rtp_rtcp_impl2.cc
View File

@ -42,11 +42,15 @@ ModuleRtpRtcpImpl2::RtpSenderContext::RtpSenderContext(
const RtpRtcpInterface::Configuration& config)
: packet_history(config.clock, config.enable_rtx_padding_prioritization),
packet_sender(config, &packet_history),
non_paced_sender(&packet_sender),
non_paced_sender(&packet_sender, this),
packet_generator(
config,
&packet_history,
config.paced_sender ? config.paced_sender : &non_paced_sender) {}
void ModuleRtpRtcpImpl2::RtpSenderContext::AssignSequenceNumber(
RtpPacketToSend* packet) {
packet_generator.AssignSequenceNumber(packet);
}
ModuleRtpRtcpImpl2::ModuleRtpRtcpImpl2(const Configuration& configuration)
: worker_queue_(TaskQueueBase::Current()),
@ -333,6 +337,31 @@ bool ModuleRtpRtcpImpl2::TrySendPacket(RtpPacketToSend* packet,
return true;
}
void ModuleRtpRtcpImpl2::SetFecProtectionParams(
const FecProtectionParams& delta_params,
const FecProtectionParams& key_params) {
RTC_DCHECK(rtp_sender_);
rtp_sender_->packet_sender.SetFecProtectionParameters(delta_params,
key_params);
}
std::vector<std::unique_ptr<RtpPacketToSend>>
ModuleRtpRtcpImpl2::FetchFecPackets() {
RTC_DCHECK(rtp_sender_);
auto fec_packets = rtp_sender_->packet_sender.FetchFecPackets();
if (!fec_packets.empty()) {
// Don't assign sequence numbers for FlexFEC packets.
const bool generate_sequence_numbers =
!rtp_sender_->packet_sender.FlexFecSsrc().has_value();
if (generate_sequence_numbers) {
for (auto& fec_packet : fec_packets) {
rtp_sender_->packet_generator.AssignSequenceNumber(fec_packet.get());
}
}
}
return fec_packets;
}
void ModuleRtpRtcpImpl2::OnPacketsAcknowledged(
rtc::ArrayView<const uint16_t> sequence_numbers) {
RTC_DCHECK(rtp_sender_);