163 lines
4.8 KiB
C++
163 lines
4.8 KiB
C++
/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: RTCPSRPacket.h
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Contains: A class that writes a RTCP Sender Report
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Change History (most recent first):
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*/
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#ifndef __RTCP_SR_PACKET__
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#define __RTCP_SR_PACKET__
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#include "OSHeaders.h"
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#include "OS.h"
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#include "MyAssert.h"
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#ifndef __Win32__
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#include <netinet/in.h> //definition of htonl
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#endif
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class RTCPSRPacket
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{
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public:
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enum
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{
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kSRPacketType = 200, //UInt32
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kByePacketType = 203
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};
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RTCPSRPacket();
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~RTCPSRPacket() {}
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// ACCESSORS
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void* GetSRPacket() { return &fSenderReportBuffer[0]; }
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UInt32 GetSRPacketLen() { return fSenderReportWithServerInfoSize; }
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UInt32 GetSRWithByePacketLen() { return fSenderReportWithServerInfoSize + kByeSizeInBytes; }
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void* GetServerInfoPacket() { return &fSenderReportBuffer[fSenderReportSize]; }
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UInt32 GetServerInfoPacketLen() { return kServerInfoSizeInBytes; }
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//
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// MODIFIERS
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//
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// FOR SR
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inline void SetSSRC(UInt32 inSSRC);
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inline void SetClientSSRC(UInt32 inClientSSRC);
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inline void SetNTPTimestamp(SInt64 inNTPTimestamp);
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inline void SetRTPTimestamp(UInt32 inRTPTimestamp);
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inline void SetPacketCount(UInt32 inPacketCount);
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inline void SetByteCount(UInt32 inByteCount);
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//
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// FOR SERVER INFO APP PACKET
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inline void SetAckTimeout(UInt32 inAckTimeoutInMsec);
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//RTCP support requires generating unique CNames for each session.
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//This function generates a proper cName and returns its length. The buffer
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//passed in must be at least kMaxCNameLen
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enum
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{
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kMaxCNameLen = 60 //Uint32
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};
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static UInt32 GetACName(char* ioCNameBuffer);
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private:
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enum
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{
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kSenderReportSizeInBytes = 36,
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kServerInfoSizeInBytes = 28,
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kByeSizeInBytes = 8
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};
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char fSenderReportBuffer[kSenderReportSizeInBytes + kMaxCNameLen + kServerInfoSizeInBytes + kByeSizeInBytes];
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UInt32 fSenderReportSize;
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UInt32 fSenderReportWithServerInfoSize;
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};
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inline void RTCPSRPacket::SetSSRC(UInt32 inSSRC)
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{
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// Set SSRC in SR
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((UInt32*)&fSenderReportBuffer)[1] = htonl(inSSRC);
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// Set SSRC in SDES
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((UInt32*)&fSenderReportBuffer)[8] = htonl(inSSRC);
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// Set SSRC in SERVER INFO
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Assert((fSenderReportSize & 3) == 0);
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((UInt32*)&fSenderReportBuffer)[(fSenderReportSize >> 2) + 1] = htonl(inSSRC);
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// Set SSRC in BYE
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Assert((fSenderReportWithServerInfoSize & 3) == 0);
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((UInt32*)&fSenderReportBuffer)[(fSenderReportWithServerInfoSize >> 2) + 1] = htonl(inSSRC);
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}
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inline void RTCPSRPacket::SetClientSSRC(UInt32 inClientSSRC)
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{
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//
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// Set Client SSRC in SERVER INFO
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((UInt32*)&fSenderReportBuffer)[(fSenderReportSize >> 2) + 3] = htonl(inClientSSRC);
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}
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inline void RTCPSRPacket::SetNTPTimestamp(SInt64 inNTPTimestamp)
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{
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#if ALLOW_NON_WORD_ALIGN_ACCESS
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((SInt64*)&fSenderReportBuffer)[1] = OS::HostToNetworkSInt64(inNTPTimestamp);
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#else
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SInt64 temp = OS::HostToNetworkSInt64(inNTPTimestamp);
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::memcpy(&((SInt64*)&fSenderReportBuffer)[1], &temp, sizeof(temp));
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#endif
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}
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inline void RTCPSRPacket::SetRTPTimestamp(UInt32 inRTPTimestamp)
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{
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((UInt32*)&fSenderReportBuffer)[4] = htonl(inRTPTimestamp);
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}
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inline void RTCPSRPacket::SetPacketCount(UInt32 inPacketCount)
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{
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((UInt32*)&fSenderReportBuffer)[5] = htonl(inPacketCount);
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}
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inline void RTCPSRPacket::SetByteCount(UInt32 inByteCount)
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{
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((UInt32*)&fSenderReportBuffer)[6] = htonl(inByteCount);
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}
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inline void RTCPSRPacket::SetAckTimeout(UInt32 inAckTimeoutInMsec)
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{
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((UInt32*)&fSenderReportBuffer)[(fSenderReportWithServerInfoSize >> 2) - 1] = htonl(inAckTimeoutInMsec);
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}
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#endif //__RTCP_SR_PACKET__
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