// RTPPacket.h: interface for the RTPPacket class.
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//
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//////////////////////////////////////////////////////////////////////
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#ifndef AFX_RTPPACKET_H__ABF83EA9_2656_47A8_B910_7F3D8DEF05F3__INCLUDED_
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#define AFX_RTPPACKET_H__ABF83EA9_2656_47A8_B910_7F3D8DEF05F3__INCLUDED_
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#include <winsock.h>
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// Winsock2 does not define IP_TOS, so define it
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// #define IP_TOS 8
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#define RTP_PAYLOADTYPE_G711_ULAW 0x00
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#define RTP_PAYLOADTYPE_G711_ALAW 0x08
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#define RTP_PAYLOADTYPE_G729 0x12
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#define RTP_PAYLOADTYPE_G723 0x04
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#define RTP_PAYLOADTYPE_SID 13 // it is NOT 0x13 as per Duanpei Wu
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class Tracer;
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class RTPPacket
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{
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public:
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RTPPacket(char *buffer, int len)
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{
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packetPtr = buffer;
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totalLength = len;
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numPadding = packetPtr[0] & 0x20 ? packetPtr[totalLength - 1] : 0;
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headerExtension = (packetPtr[0] & 0x10) != 0;
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contributorCount = packetPtr[0] & 0x0f;
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marker = (packetPtr[1] & 0x80) != 0;
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payloadType = packetPtr[1] & 0x7f;
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seqNo = ntohs(*((short *)(packetPtr + 2)));
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timestamp = ntohl(*((unsigned long *)(packetPtr + 4)));
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ssrc = ntohl(*((unsigned long *)(packetPtr + 8)));
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version = (packetPtr[0] & 0xc0) >> 6;
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headerLength = 12 + 4 * contributorCount;
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dataLen = totalLength - headerLength - numPadding;
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rtpData = packetPtr + headerLength;
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}
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virtual ~RTPPacket() {}
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static RTPPacket* CreateRTPPacket(char *buffer, int bufferLen, Tracer *tracer);
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bool HeaderExtension() { return headerExtension; }
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unsigned char ContributorCount() { return contributorCount; }
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bool Marker() { return marker; }
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unsigned char PayloadType() { return payloadType; }
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unsigned short SeqNo() { return seqNo; }
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unsigned long Timestamp() { return timestamp; }
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unsigned long Ssrc() { return ssrc; }
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unsigned long DataLen() { return dataLen; }
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char *RtpData() { return rtpData; }
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char *RtpHeader() { return packetPtr; }
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unsigned char Version() { return version; }
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unsigned long HeaderLength() { return headerLength; }
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RTPPacket *CloneHeader();
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private:
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bool headerExtension;
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unsigned char contributorCount;
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bool marker;
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unsigned char payloadType;
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unsigned short seqNo;
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unsigned long timestamp;
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unsigned long ssrc;
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unsigned long dataLen;
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char *rtpData;
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unsigned char version;
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unsigned long headerLength;
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char *packetPtr;
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unsigned long totalLength;
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unsigned long numPadding;
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};
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#endif // !defined(AFX_RTPPACKET_H__ABF83EA9_2656_47A8_B910_7F3D8DEF05F3__INCLUDED_)
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