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| 1 /* | 1 /* |
| 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 * | 9 * |
| 10 */ | 10 */ |
| 11 | 11 |
| 12 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ | 12 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ |
| 13 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ | 13 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ |
| 14 | 14 |
| 15 #include <vector> | 15 #include <vector> |
| 16 | 16 |
| 17 #include "webrtc/base/scoped_ptr.h" | 17 #include "webrtc/base/scoped_ptr.h" |
| 18 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" | |
| 19 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h" | |
| 20 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h" | 18 #include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h" |
| 21 #include "webrtc/typedefs.h" | 19 #include "webrtc/typedefs.h" |
| 22 | 20 |
| 23 namespace webrtc { | 21 namespace webrtc { |
| 24 namespace rtcp { | 22 namespace rtcp { |
| 25 | 23 |
| 26 static const int kCommonFbFmtLength = 12; | 24 static const int kCommonFbFmtLength = 12; |
| 27 static const int kReportBlockLength = 24; | |
| 28 | 25 |
| 29 class RawPacket; | 26 class RawPacket; |
| 30 | 27 |
| 31 // Class for building RTCP packets. | 28 // Class for building RTCP packets. |
| 32 // | 29 // |
| 33 // Example: | 30 // Example: |
| 34 // ReportBlock report_block; | 31 // ReportBlock report_block; |
| 35 // report_block.To(234) | 32 // report_block.To(234) |
| 36 // report_block.FractionLost(10); | 33 // report_block.FractionLost(10); |
| 37 // | 34 // |
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| 113 static const size_t kHeaderLength = 4; | 110 static const size_t kHeaderLength = 4; |
| 114 std::vector<RtcpPacket*> appended_packets_; | 111 std::vector<RtcpPacket*> appended_packets_; |
| 115 | 112 |
| 116 private: | 113 private: |
| 117 bool CreateAndAddAppended(uint8_t* packet, | 114 bool CreateAndAddAppended(uint8_t* packet, |
| 118 size_t* index, | 115 size_t* index, |
| 119 size_t max_length, | 116 size_t max_length, |
| 120 PacketReadyCallback* callback) const; | 117 PacketReadyCallback* callback) const; |
| 121 }; | 118 }; |
| 122 | 119 |
| 123 // TODO(sprang): Move RtcpPacket subclasses out to separate files. | |
| 124 | |
| 125 // RTCP sender report (RFC 3550). | |
| 126 // | |
| 127 // 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 | |
| 128 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 129 // |V=2|P| RC | PT=SR=200 | length | | |
| 130 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 131 // | SSRC of sender | | |
| 132 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | |
| 133 // | NTP timestamp, most significant word | | |
| 134 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 135 // | NTP timestamp, least significant word | | |
| 136 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 137 // | RTP timestamp | | |
| 138 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 139 // | sender's packet count | | |
| 140 // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 141 // | sender's octet count | | |
| 142 // +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | |
| 143 // | report block(s) | | |
| 144 // | .... | | |
| 145 | |
| 146 class SenderReport : public RtcpPacket { | |
| 147 public: | |
| 148 SenderReport() : RtcpPacket() { | |
| 149 memset(&sr_, 0, sizeof(sr_)); | |
| 150 } | |
| 151 | |
| 152 virtual ~SenderReport() {} | |
| 153 | |
| 154 void From(uint32_t ssrc) { | |
| 155 sr_.SenderSSRC = ssrc; | |
| 156 } | |
| 157 void WithNtpSec(uint32_t sec) { | |
| 158 sr_.NTPMostSignificant = sec; | |
| 159 } | |
| 160 void WithNtpFrac(uint32_t frac) { | |
| 161 sr_.NTPLeastSignificant = frac; | |
| 162 } | |
| 163 void WithRtpTimestamp(uint32_t rtp_timestamp) { | |
| 164 sr_.RTPTimestamp = rtp_timestamp; | |
| 165 } | |
| 166 void WithPacketCount(uint32_t packet_count) { | |
| 167 sr_.SenderPacketCount = packet_count; | |
| 168 } | |
| 169 void WithOctetCount(uint32_t octet_count) { | |
| 170 sr_.SenderOctetCount = octet_count; | |
| 171 } | |
| 172 bool WithReportBlock(const ReportBlock& block); | |
| 173 | |
| 174 protected: | |
| 175 bool Create(uint8_t* packet, | |
| 176 size_t* index, | |
| 177 size_t max_length, | |
| 178 RtcpPacket::PacketReadyCallback* callback) const override; | |
| 179 | |
| 180 private: | |
| 181 static const int kMaxNumberOfReportBlocks = 0x1f; | |
| 182 | |
| 183 size_t BlockLength() const { | |
| 184 const size_t kSrHeaderLength = 8; | |
| 185 const size_t kSenderInfoLength = 20; | |
| 186 return kSrHeaderLength + kSenderInfoLength + | |
| 187 report_blocks_.size() * kReportBlockLength; | |
| 188 } | |
| 189 | |
| 190 RTCPUtility::RTCPPacketSR sr_; | |
| 191 std::vector<ReportBlock> report_blocks_; | |
| 192 | |
| 193 RTC_DISALLOW_COPY_AND_ASSIGN(SenderReport); | |
| 194 }; | |
| 195 | |
| 196 // Class holding a RTCP packet. | 120 // Class holding a RTCP packet. |
| 197 // | 121 // |
| 198 // Takes a built rtcp packet. | 122 // Takes a built rtcp packet. |
| 199 // RawPacket raw_packet(buffer, length); | 123 // RawPacket raw_packet(buffer, length); |
| 200 // | 124 // |
| 201 // To access the raw packet: | 125 // To access the raw packet: |
| 202 // raw_packet.Buffer(); - pointer to the raw packet | 126 // raw_packet.Buffer(); - pointer to the raw packet |
| 203 // raw_packet.BufferLength(); - the length of the raw packet | 127 // raw_packet.BufferLength(); - the length of the raw packet |
| 204 | 128 |
| 205 class RawPacket { | 129 class RawPacket { |
| 206 public: | 130 public: |
| 207 explicit RawPacket(size_t buffer_length); | 131 explicit RawPacket(size_t buffer_length); |
| 208 RawPacket(const uint8_t* packet, size_t packet_length); | 132 RawPacket(const uint8_t* packet, size_t packet_length); |
| 209 | 133 |
| 210 const uint8_t* Buffer() const; | 134 const uint8_t* Buffer() const; |
| 211 uint8_t* MutableBuffer(); | 135 uint8_t* MutableBuffer(); |
| 212 size_t BufferLength() const; | 136 size_t BufferLength() const; |
| 213 size_t Length() const; | 137 size_t Length() const; |
| 214 void SetLength(size_t length); | 138 void SetLength(size_t length); |
| 215 | 139 |
| 216 private: | 140 private: |
| 217 const size_t buffer_length_; | 141 const size_t buffer_length_; |
| 218 size_t length_; | 142 size_t length_; |
| 219 rtc::scoped_ptr<uint8_t[]> buffer_; | 143 rtc::scoped_ptr<uint8_t[]> buffer_; |
| 220 }; | 144 }; |
| 221 | 145 |
| 222 } // namespace rtcp | 146 } // namespace rtcp |
| 223 } // namespace webrtc | 147 } // namespace webrtc |
| 224 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ | 148 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_H_ |
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