/***************************************************************************
 *     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