c20978e581
NOPRESUBMIT=True # cpplint errors that aren't caused by this CL. NOTRY=True NOTREECHECKS=True TBR=kwiberg@webrtc.org, kjellander@webrtc.org Bug: webrtc:7634 Change-Id: I3cca0fbaa807b563c95979cccd6d1bec32055f36 Reviewed-on: https://chromium-review.googlesource.com/562156 Commit-Queue: Edward Lemur <ehmaldonado@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18919}
50 lines
2.0 KiB
C++
50 lines
2.0 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/rrtr.h"
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#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
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#include "webrtc/rtc_base/checks.h"
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namespace webrtc {
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namespace rtcp {
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// Receiver Reference Time 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=4 | reserved | block length = 2 |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | NTP timestamp, most significant word |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | NTP timestamp, least significant word |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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void Rrtr::Parse(const uint8_t* buffer) {
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RTC_DCHECK(buffer[0] == kBlockType);
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// reserved = buffer[1];
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RTC_DCHECK(ByteReader<uint16_t>::ReadBigEndian(&buffer[2]) == kBlockLength);
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uint32_t seconds = ByteReader<uint32_t>::ReadBigEndian(&buffer[4]);
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uint32_t fraction = ByteReader<uint32_t>::ReadBigEndian(&buffer[8]);
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ntp_.Set(seconds, fraction);
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}
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void Rrtr::Create(uint8_t* buffer) const {
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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], kBlockLength);
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ByteWriter<uint32_t>::WriteBigEndian(&buffer[4], ntp_.seconds());
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ByteWriter<uint32_t>::WriteBigEndian(&buffer[8], ntp_.fractions());
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}
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} // namespace rtcp
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} // namespace webrtc
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