8fa21c49ef
1. To make the files conform to chromium-style guidelines, and stop the compiler from complaing: 1.1. Move constructors out of .h file. 1.2. Move destructors out of .h file. 1.3. Move virtual functions out of .h file. 2. BlockLength() and Create() did not have consistent access modifiers in the various subclasses of RtcpPacket. Change the access level to public throughout. 3. Reorder BlockLength() and Create() where necessary, to reflect the order defined in the parent class (RtcpPacket). BUG=None Review-Url: https://codereview.webrtc.org/2937403002 Cr-Commit-Position: refs/heads/master@{#18633}
93 lines
3.5 KiB
C++
93 lines
3.5 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/dlrr.h"
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#include "webrtc/base/checks.h"
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#include "webrtc/base/logging.h"
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#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
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namespace webrtc {
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namespace rtcp {
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// DLRR Report Block (RFC 3611).
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//
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// 0 1 2 3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | BT=5 | reserved | block length |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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// | SSRC_1 (SSRC of first receiver) | sub-
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ block
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// | last RR (LRR) | 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | delay since last RR (DLRR) |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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// | SSRC_2 (SSRC of second receiver) | sub-
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ block
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// : ... : 2
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Dlrr::Dlrr() = default;
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Dlrr::Dlrr(const Dlrr& other) = default;
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Dlrr::~Dlrr() = default;
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bool Dlrr::Parse(const uint8_t* buffer, uint16_t block_length_32bits) {
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RTC_DCHECK(buffer[0] == kBlockType);
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// kReserved = buffer[1];
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RTC_DCHECK_EQ(block_length_32bits,
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ByteReader<uint16_t>::ReadBigEndian(&buffer[2]));
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if (block_length_32bits % 3 != 0) {
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LOG(LS_WARNING) << "Invalid size for dlrr block.";
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return false;
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}
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size_t blocks_count = block_length_32bits / 3;
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const uint8_t* read_at = buffer + kBlockHeaderLength;
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sub_blocks_.resize(blocks_count);
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for (ReceiveTimeInfo& sub_block : sub_blocks_) {
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sub_block.ssrc = ByteReader<uint32_t>::ReadBigEndian(&read_at[0]);
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sub_block.last_rr = ByteReader<uint32_t>::ReadBigEndian(&read_at[4]);
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sub_block.delay_since_last_rr =
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ByteReader<uint32_t>::ReadBigEndian(&read_at[8]);
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read_at += kSubBlockLength;
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}
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return true;
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}
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size_t Dlrr::BlockLength() const {
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if (sub_blocks_.empty())
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return 0;
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return kBlockHeaderLength + kSubBlockLength * sub_blocks_.size();
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}
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void Dlrr::Create(uint8_t* buffer) const {
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if (sub_blocks_.empty()) // No subblocks, no need to write header either.
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return;
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// Create block header.
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const uint8_t kReserved = 0;
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buffer[0] = kBlockType;
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buffer[1] = kReserved;
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ByteWriter<uint16_t>::WriteBigEndian(&buffer[2], 3 * sub_blocks_.size());
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// Create sub blocks.
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uint8_t* write_at = buffer + kBlockHeaderLength;
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for (const ReceiveTimeInfo& sub_block : sub_blocks_) {
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ByteWriter<uint32_t>::WriteBigEndian(&write_at[0], sub_block.ssrc);
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ByteWriter<uint32_t>::WriteBigEndian(&write_at[4], sub_block.last_rr);
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ByteWriter<uint32_t>::WriteBigEndian(&write_at[8],
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sub_block.delay_since_last_rr);
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write_at += kSubBlockLength;
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}
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RTC_DCHECK_EQ(buffer + BlockLength(), write_at);
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}
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} // namespace rtcp
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} // namespace webrtc
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