1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 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 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 12 #define MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 13 14 #include <cstring> 15 #include <map> 16 17 #include "modules/rtp_rtcp/include/receive_statistics.h" 18 #include "modules/rtp_rtcp/include/rtp_header_extension_map.h" 19 #include "modules/rtp_rtcp/include/rtp_rtcp_defines.h" 20 #include "modules/rtp_rtcp/source/rtp_rtcp_config.h" 21 #include "rtc_base/deprecation.h" 22 #include "typedefs.h" // NOLINT(build/include) 23 24 namespace webrtc { 25 26 const uint8_t kRtpMarkerBitMask = 0x80; 27 28 RtpFeedback* NullObjectRtpFeedback(); 29 30 namespace RtpUtility { 31 32 struct Payload { PayloadPayload33 Payload(const char* name, const PayloadUnion& pu) : typeSpecific(pu) { 34 std::strncpy(this->name, name, sizeof(this->name) - 1); 35 this->name[sizeof(this->name) - 1] = '\0'; 36 } 37 char name[RTP_PAYLOAD_NAME_SIZE]; 38 PayloadUnion typeSpecific; 39 }; 40 41 bool StringCompare(const char* str1, const char* str2, const uint32_t length); 42 43 // Round up to the nearest size that is a multiple of 4. 44 size_t Word32Align(size_t size); 45 46 class RtpHeaderParser { 47 public: 48 RtpHeaderParser(const uint8_t* rtpData, size_t rtpDataLength); 49 ~RtpHeaderParser(); 50 51 bool RTCP() const; 52 bool ParseRtcp(RTPHeader* header) const; 53 bool Parse(RTPHeader* parsedPacket, 54 RtpHeaderExtensionMap* ptrExtensionMap = nullptr, 55 bool secured = false) const; 56 57 private: 58 void ParseOneByteExtensionHeader(RTPHeader* parsedPacket, 59 const RtpHeaderExtensionMap* ptrExtensionMap, 60 const uint8_t* ptrRTPDataExtensionEnd, 61 const uint8_t* ptr) const; 62 63 const uint8_t* const _ptrRTPDataBegin; 64 const uint8_t* const _ptrRTPDataEnd; 65 }; 66 } // namespace RtpUtility 67 } // namespace webrtc 68 69 #endif // MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 70