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 WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 12 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 13 14 #include <map> 15 16 #include "webrtc/base/deprecation.h" 17 #include "webrtc/modules/rtp_rtcp/include/receive_statistics.h" 18 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h" 19 #include "webrtc/modules/rtp_rtcp/source/rtp_header_extension.h" 20 #include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_config.h" 21 #include "webrtc/typedefs.h" 22 23 namespace webrtc { 24 25 const uint8_t kRtpMarkerBitMask = 0x80; 26 27 RtpData* NullObjectRtpData(); 28 RtpFeedback* NullObjectRtpFeedback(); 29 RtpAudioFeedback* NullObjectRtpAudioFeedback(); 30 ReceiveStatistics* NullObjectReceiveStatistics(); 31 32 namespace RtpUtility { 33 34 struct Payload { 35 char name[RTP_PAYLOAD_NAME_SIZE]; 36 bool audio; 37 PayloadUnion typeSpecific; 38 }; 39 40 typedef std::map<int8_t, Payload*> PayloadTypeMap; 41 42 bool StringCompare(const char* str1, const char* str2, const uint32_t length); 43 44 // Round up to the nearest size that is a multiple of 4. 45 size_t Word32Align(size_t size); 46 47 class RtpHeaderParser { 48 public: 49 RtpHeaderParser(const uint8_t* rtpData, size_t rtpDataLength); 50 ~RtpHeaderParser(); 51 52 bool RTCP() const; 53 bool ParseRtcp(RTPHeader* header) const; 54 bool Parse(RTPHeader* parsedPacket, 55 RtpHeaderExtensionMap* ptrExtensionMap = nullptr) const; 56 RTC_DEPRECATED bool Parse( 57 RTPHeader& parsedPacket, // NOLINT(runtime/references) 58 RtpHeaderExtensionMap* ptrExtensionMap = nullptr) const { 59 return Parse(&parsedPacket, ptrExtensionMap); 60 } 61 62 private: 63 void ParseOneByteExtensionHeader(RTPHeader* parsedPacket, 64 const RtpHeaderExtensionMap* ptrExtensionMap, 65 const uint8_t* ptrRTPDataExtensionEnd, 66 const uint8_t* ptr) const; 67 68 uint8_t ParsePaddingBytes(const uint8_t* ptrRTPDataExtensionEnd, 69 const uint8_t* ptr) const; 70 71 const uint8_t* const _ptrRTPDataBegin; 72 const uint8_t* const _ptrRTPDataEnd; 73 }; 74 } // namespace RtpUtility 75 } // namespace webrtc 76 77 #endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_UTILITY_H_ 78