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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
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5
test/fuzzers/flexfec_header_reader_fuzzer.cc
View File

@ -25,8 +25,9 @@ void FuzzOneInput(const uint8_t* data, size_t size) {
packet.pkt = rtc::scoped_refptr<Packet>(new Packet());
const size_t packet_size =
std::min(size, static_cast<size_t>(IP_PACKET_SIZE));
memcpy(packet.pkt->data, data, packet_size);
packet.pkt->length = packet_size;
packet.pkt->data.SetSize(packet_size);
packet.pkt->data.EnsureCapacity(IP_PACKET_SIZE);
memcpy(packet.pkt->data.data(), data, packet_size);
FlexfecHeaderReader flexfec_reader;
flexfec_reader.ReadFecHeader(&packet);