rtp.h

3－8 VHDL 译码器 请

/**********************************************************************
 * Software Copyright Licensing Disclaimer
 *
 * This software module was originally developed by contributors to the
 * course of the development of ISO/IEC 14496-10 for reference purposes
 * and its performance may not have been optimized.  This software
 * module is an implementation of one or more tools as specified by
 * ISO/IEC 14496-10.  ISO/IEC gives users free license to this software
 * module or modifications thereof. Those intending to use this software
 * module in products are advised that its use may infringe existing
 * patents.  ISO/IEC have no liability for use of this software module
 * or modifications thereof.  The original contributors retain full
 * rights to modify and use the code for their own purposes, and to
 * assign or donate the code to third-parties.
 *
 * This copyright notice must be included in all copies or derivative
 * works.  Copyright (c) ISO/IEC 2004.
 **********************************************************************/

/*!
 *************************************************************************************
 * \file rtp.h
 *
 * \brief
 *    Prototypes for rtp.c
 *************************************************************************************
 */

#ifndef _RTP_H_
#define _RTP_H_

#include "nalucommon.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 old_seq;    //!< to detect wether packets were lost
  unsigned int timestamp;  //!< timestamp, 27 MHz for H.264
  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;

void DumpRTPHeader (RTPpacket_t *p);

int  GetRTPNALU (NALU_t *nalu);
void OpenRTPFile (char *fn);
void CloseRTPFile();

#endif