/*! *************************************************************************** * * \file rtp.h * * \brief * Definition of structures and functions to handle RTP headers. For a * description of RTP see RFC1889 on http://www.ietf.org * * \date * 30 September 2001 * * \author * Stephan Wenger stewe@cs.tu-berlin.de **************************************************************************/ #ifndef _RTP_H_ #define _RTP_H_ #include #include "global.h" #include "nalu.h" #define MAXRTPPAYLOADLEN (65536 - 40) //!< Maximum payload size of an RTP packet #define MAXRTPPACKETSIZE (65536 - 28) //!< Maximum size of an RTP packet incl. header #define H26LPAYLOADTYPE 105 //!< RTP paylaod type fixed here for simplicity #define H26LSSRC 0x12345678 //!< SSRC, chosen to simplify debugging #define RTP_TR_TIMESTAMP_MULT 1000 //!< should be something like 27 Mhz / 29.97 Hz typedef struct { unsigned int v; //!< Version, 2 bits, MUST be 0x2 unsigned int p; //!< Padding bit, Padding MUST NOT be used unsigned int x; //!< Extension, MUST be zero */ unsigned int cc; /*!< CSRC count, normally 0 in the absence of RTP mixers */ unsigned int m; //!< Marker bit unsigned int pt; //!< 7 bits, Payload Type, dynamically established unsigned int seq; /*!< RTP sequence number, incremented by one for each sent packet */ unsigned int timestamp; //!< timestamp, 27 MHz for H.26L unsigned int ssrc; //!< Synchronization Source, chosen randomly byte * payload; //!< the payload including payload headers unsigned int paylen; //!< length of payload in bytes byte * packet; //!< complete packet including header and payload unsigned int packlen; //!< length of packet, typically paylen+12 } RTPpacket_t; #if 0 int ComposeRTPPacket (RTPpacket_t *p); int DecomposeRTPpacket (RTPpacket_t *p); int WriteRTPPacket (RTPpacket_t *p, FILE *f); void DumpRTPHeader (RTPpacket_t *p); void RTPUpdateTimestamp (int tr); int RTPWriteBits (int Marker, int PacketType, void * bitstream, int BitStreamLenInByte, FILE *out); Boolean isAggregationPacket(); int aggregationRTPWriteBits (int Marker, int PacketType, int subPacketType, void * bitstream, int BitStreamLenInByte, FILE *out); void begin_sub_sequence_rtp(); void end_sub_sequence_rtp(); #endif void RTPUpdateTimestamp (int tr); void OpenRTPFile (char *Filename); void CloseRTPFile (); int WriteRTPNALU (NALU_t *n); #endif
