source: svn/trunk/newcon3bcm2_21bu/dta/src/nexus/rtp.h @ 2

/***************************************************************************
 *     Copyright (c) 2012, Broadcom Corporation
 *     All Rights Reserved
 *     Confidential Property of Broadcom Corporation
 *
 *  THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE
 *  AGREEMENT  BETWEEN THE USER AND BROADCOM.  YOU HAVE NO RIGHT TO USE OR
 *  EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT.
 *
 * $brcm_Workfile:  $
 * $brcm_Revision:  $
 * $brcm_Date: $
 *
 * Module Description:
 *
 * Revision History:
 *
 * $brcm_Log:  $
 *
 ***************************************************************************/

#ifndef _RTP_H
#define _RTP_H

#if defined(NEXUS_LINUXUSER)
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <resolv.h>
#include <unistd.h>
#elif defined(CONFIG_LWIP)
#include "lwip/sockets.h"
#endif

#define RTP_TS_UNIT                     188
#ifdef CONFIG_LWIP
#define RTP_MAX_TS_PER_MTU      7
#else
#define RTP_MAX_TS_PER_MTU      28       /* TODO:: to make packet size under network layer's MTU. Need to verify Packet size on lwip */
#endif
#define RTP_PAYLOAD_SIZE        (RTP_TS_UNIT*RTP_MAX_TS_PER_MTU)
#define RTP_HEADER_SIZE         12
#define RTP_PACKET_SIZE         (RTP_PAYLOAD_SIZE+RTP_HEADER_SIZE)
#define RTP_MP2T                        33

enum
{
        RTP_OK = 0,
        RTP_RECV_ERR = 1,
        RTP_SOCKET_ERR = 2,
        RTP_MEM_ERR = 3,
};

/* this is for gcc little endian */
typedef struct rtp_bits_t 
{
        unsigned int cc:4;                              /* CSRC identifiers */
        unsigned int x:1;                               /* extension headers */
        unsigned int p:1;                               /* padding */
        unsigned int v:2;                               /* version */
        unsigned int pt:7;                              /* payload type, see RFC 1890 */
        unsigned int m:1;                               /* marker */
        unsigned int seq:16;                    /* sequence number */
}rtp_bits_t;

typedef struct rtp_header_t
{
  rtp_bits_t    b;
  int                   timestamp;
  int                   csrc;
}rtp_header_t;

typedef struct rtp_t
{
        rtp_header_t                    rtph;           /* default RTP header */
#if defined(NEXUS_LINUXUSER)||defined(CONFIG_LWIP)
        struct sockaddr_in              saddr;
#endif
        int                                             s_fd;           /* socket descriptor */
        unsigned char                   *buf;           /* datagram buffer */
        unsigned int                    buf_len;        /* length of the buffer */
        unsigned char                   *data_buf;      /* pointer to payload buffer */
        int                                             h_len;          /* header length */
}rtp_t;


#ifdef __cplusplus
extern "C" {
#endif

int init_rtp(
                                rtp_t *p_rtp,                   /* uninitialized RTP structure */
                                unsigned int buf_len,   /* buffer length in bytes */
                                int payload_type                /* payload type of default RTP header (to use for sending) */
                                );
void free_rtp(
                                rtp_t *p_rtp                    /* initialized RTP structure */
                                );

int get_rtp(
                                rtp_t *p_rtp,                   /* initialized RTP structure */
                                unsigned int *len               /* output payload size in bytes */
                                );

int send_rtp(
                                rtp_t *p_rtp,                   /* initialized RTP structure */
                                unsigned char *buf,
                                unsigned int len                /* number of bytes in payload */
                                );

int makesocket_rtp(
                                rtp_t *p_rtp,                   /* initialized RTP structure */
                                char *addr_str,                 /* address string */
                                unsigned short port,    /* create socket for port */
                                int ttl                                 /* TTL */
                                );

int makeclientsocket_rtp(
                                rtp_t *p_rtp,                   /* initialized RTP structure */
                                char *addr_str,                 /* address string */
                                unsigned short port,    /* create socket for port */
                                int ttl                                 /* TTL */
                                );

#ifdef __cplusplus
}
#endif


#endif