blob: b715b3dedf750385bd1f46a99753eca209aec65c [file] [log] [blame]
/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/rtp_rtcp/source/rtcp_packet/voip_metric.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace rtcp {
// VoIP Metrics Report Block (RFC 3611).
//
// 0 1 2 3
// 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
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 0 | BT=7 | reserved | block length = 8 |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 4 | SSRC of source |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 8 | loss rate | discard rate | burst density | gap density |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 12 | burst duration | gap duration |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 16 | round trip delay | end system delay |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 20 | signal level | noise level | RERL | Gmin |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 24 | R factor | ext. R factor | MOS-LQ | MOS-CQ |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 28 | RX config | reserved | JB nominal |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// 32 | JB maximum | JB abs max |
// 36 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
VoipMetric::VoipMetric() : ssrc_(0) {
memset(&voip_metric_, 0, sizeof(voip_metric_));
}
void VoipMetric::Parse(const uint8_t* buffer) {
RTC_DCHECK(buffer[0] == kBlockType);
// reserved = buffer[1];
RTC_DCHECK(ByteReader<uint16_t>::ReadBigEndian(&buffer[2]) == kBlockLength);
ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&buffer[4]);
voip_metric_.lossRate = buffer[8];
voip_metric_.discardRate = buffer[9];
voip_metric_.burstDensity = buffer[10];
voip_metric_.gapDensity = buffer[11];
voip_metric_.burstDuration = ByteReader<uint16_t>::ReadBigEndian(&buffer[12]);
voip_metric_.gapDuration = ByteReader<uint16_t>::ReadBigEndian(&buffer[14]);
voip_metric_.roundTripDelay =
ByteReader<uint16_t>::ReadBigEndian(&buffer[16]);
voip_metric_.endSystemDelay =
ByteReader<uint16_t>::ReadBigEndian(&buffer[18]);
voip_metric_.signalLevel = buffer[20];
voip_metric_.noiseLevel = buffer[21];
voip_metric_.RERL = buffer[22];
voip_metric_.Gmin = buffer[23];
voip_metric_.Rfactor = buffer[24];
voip_metric_.extRfactor = buffer[25];
voip_metric_.MOSLQ = buffer[26];
voip_metric_.MOSCQ = buffer[27];
voip_metric_.RXconfig = buffer[28];
// reserved = buffer[29];
voip_metric_.JBnominal = ByteReader<uint16_t>::ReadBigEndian(&buffer[30]);
voip_metric_.JBmax = ByteReader<uint16_t>::ReadBigEndian(&buffer[32]);
voip_metric_.JBabsMax = ByteReader<uint16_t>::ReadBigEndian(&buffer[34]);
}
void VoipMetric::Create(uint8_t* buffer) const {
const uint8_t kReserved = 0;
buffer[0] = kBlockType;
buffer[1] = kReserved;
ByteWriter<uint16_t>::WriteBigEndian(&buffer[2], kBlockLength);
ByteWriter<uint32_t>::WriteBigEndian(&buffer[4], ssrc_);
buffer[8] = voip_metric_.lossRate;
buffer[9] = voip_metric_.discardRate;
buffer[10] = voip_metric_.burstDensity;
buffer[11] = voip_metric_.gapDensity;
ByteWriter<uint16_t>::WriteBigEndian(&buffer[12], voip_metric_.burstDuration);
ByteWriter<uint16_t>::WriteBigEndian(&buffer[14], voip_metric_.gapDuration);
ByteWriter<uint16_t>::WriteBigEndian(&buffer[16],
voip_metric_.roundTripDelay);
ByteWriter<uint16_t>::WriteBigEndian(&buffer[18],
voip_metric_.endSystemDelay);
buffer[20] = voip_metric_.signalLevel;
buffer[21] = voip_metric_.noiseLevel;
buffer[22] = voip_metric_.RERL;
buffer[23] = voip_metric_.Gmin;
buffer[24] = voip_metric_.Rfactor;
buffer[25] = voip_metric_.extRfactor;
buffer[26] = voip_metric_.MOSLQ;
buffer[27] = voip_metric_.MOSCQ;
buffer[28] = voip_metric_.RXconfig;
buffer[29] = kReserved;
ByteWriter<uint16_t>::WriteBigEndian(&buffer[30], voip_metric_.JBnominal);
ByteWriter<uint16_t>::WriteBigEndian(&buffer[32], voip_metric_.JBmax);
ByteWriter<uint16_t>::WriteBigEndian(&buffer[34], voip_metric_.JBabsMax);
}
} // namespace rtcp
} // namespace webrtc