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Refactor FEC code to use COW buffers

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This refactoring helps to reduce unnecessary memcpy calls on the receive
side.

This CL replaces
|uint8 data[IP_PACKET_SIZE]| with |rtc::CopyOnWriteBuffer data| in Packet class,
removes |length| field there, and does necessary changes.

This is a reland of these two CLs with fixes:
https://webrtc-review.googlesource.com/c/src/+/144942
https://webrtc-review.googlesource.com/c/src/+/144881

Bug: webrtc:10750
Change-Id: I76f6dee5a57ade59942ea2822ca4737edfe6438b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/145332
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29035}
This commit is contained in:
Ilya Nikolaevskiy
2019-09-02 13:58:49 +02:00
committed by Commit Bot
parent a66395e72f
commit eec5fff4df
25 changed files with 357 additions and 328 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
modules/rtp_rtcp/source/flexfec_sender.cc
View File

@ -114,7 +114,7 @@ bool FlexfecSender::AddRtpPacketAndGenerateFec(const RtpPacketToSend& packet) {
// protection.
RTC_DCHECK_EQ(packet.Ssrc(), protected_media_ssrc_);
return ulpfec_generator_.AddRtpPacketAndGenerateFec(
packet.data(), packet.payload_size(), packet.headers_size()) == 0;
packet.Buffer(), packet.headers_size()) == 0;
}
bool FlexfecSender::FecAvailable() const {
@ -153,8 +153,9 @@ std::vector<std::unique_ptr<RtpPacketToSend>> FlexfecSender::GetFecPackets() {
}
// RTP payload.
uint8_t* payload = fec_packet_to_send->AllocatePayload(fec_packet->length);
memcpy(payload, fec_packet->data, fec_packet->length);
uint8_t* payload =
fec_packet_to_send->AllocatePayload(fec_packet->data.size());
memcpy(payload, fec_packet->data.cdata(), fec_packet->data.size());
fec_packets_to_send.push_back(std::move(fec_packet_to_send));
}