/* *
 *  $Id: rtp.h 395 2006-10-05 16:08:10Z shawill $
 *
 *  This file is part of Fenice
 *
 *  Fenice -- Open Media Server
 *
 *  Copyright (C) 2004 by
 *
 *	- Giampaolo Mancini	<giampaolo.mancini@polito.it>
 *	- Francesco Varano	<francesco.varano@polito.it>
 *	- Marco Penno		<marco.penno@polito.it>
 *	- Federico Ridolfo	<federico.ridolfo@polito.it>
 *	- Eugenio Menegatti 	<m.eu@libero.it>
 *	- Stefano Cau
 *	- Giuliano Emma
 *	- Stefano Oldrini
 *	- Dario Gallucci	<dario.gallucci@gmail.com>
 *
 *  Fenice is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Fenice is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Fenice; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * */

#ifndef _RTPH
#define _RTPH


#include "socket.h"
#include "mediainfo.h"
#include "bufferpool.h"
#include "types.h"
#include "prefs.h"



#define RTP_DEFAULT_PORT 5004
#define RTCP_BUFFERSIZE	1024

typedef enum {
    i_server = 0,
    i_client = 1
} rtcp_index;

typedef struct {
    int RTP;
    int RTCP;
} port_pair;

typedef enum {
    rtp_proto = 0,
    rtcp_proto
} rtp_protos;

typedef struct {
    uint16 RTP;
    uint16 RTCP;
} stream_pair;

typedef struct _RTP_transport {
    enum {
        RTP_no_transport = 0,
        RTP_rtp_avp,
        RTP_rtp_avp_tcp,
        RTP_rtp_avp_sctp
    } type;
    tsocket rtp_fd;
    tsocket rtcp_fd_out;
    tsocket rtcp_fd_in;
    union {
        struct {
            struct sockaddr rtp_peer;
            struct sockaddr rtcp_in_peer;
            struct sockaddr rtcp_out_peer;
            port_pair cli_ports;
            port_pair ser_ports;
            unsigned char is_multicast;
        } udp;
        struct {
            stream_pair interleaved;
        } tcp;
        struct {
            stream_pair streams;
        } sctp;
        // other trasports here
    } u;
} RTP_transport;

typedef struct _RTCP_stats {
    unsigned int RR_received;
    unsigned int SR_received;
    unsigned long dest_SSRC;
    unsigned int pkt_count;
    unsigned int octet_count;
    int pkt_lost;
    unsigned char fract_lost;
    unsigned int highest_seq_no;
    unsigned int jitter;
    unsigned int last_SR;
    unsigned int delay_since_last_SR;
} RTCP_stats;

typedef struct _RTP_session {
    RTP_transport transport;
    unsigned char rtcp_inbuffer[RTCP_BUFFERSIZE];
    int rtcp_insize;
    unsigned char rtcp_outbuffer[RTCP_BUFFERSIZE];
    uint32 rtcp_outsize;
    /*
       //these time vars now are in media_entry structure
       uint64 mtime;
       uint64 mstart;
       uint64 mstart_offset; */

    uint64 mprev_tx_time;
    unsigned int PreviousCount;
    short MinimumReached;
    short MaximumReached;
    // Back references
    int sched_id;
    unsigned int start_seq;

    unsigned int start_rtptime;

    unsigned char pause;
    //this var is in media_entry structure
    unsigned char started;

    unsigned int seq;
    unsigned int ssrc;

    unsigned int rtp_break; /* 当将该值设为1时,在RTP_sendto.c中跳出while循环 */

//              port_pair ser_ports;
//              port_pair cli_ports;
    char sd_filename[255];
    media_entry *current_media;
    SD_descr *sd_descr;

    //Consumer has transferred itself here
    OMSConsumer *cons;
    RTCP_stats rtcp_stats[2];	//client e server
    struct _RTP_session *next;
    unsigned char is_multicast_dad;	/*if is it an multicast son it cannot do TEARDOWN etc... */
} RTP_session;

typedef struct _RTP_header {
    /* byte 0 */
#if (BYTE_ORDER == LITTLE_ENDIAN)
    unsigned char csrc_len: 4;	/* expect 0 */
    unsigned char extension: 1;	/* expect 1, see RTP_OP below */
    unsigned char padding: 1;	/* expect 0 */
    unsigned char version: 2;	/* expect 2 */
#elif (BYTE_ORDER == BIG_ENDIAN)
    unsigned char version: 2;
    unsigned char padding: 1;
    unsigned char extension: 1;
    unsigned char csrc_len: 4;
#else
#error Neither big nor little
#endif
    /* byte 1 */
#if (BYTE_ORDER == LITTLE_ENDIAN)
    unsigned char payload: 7;	/* RTP_PAYLOAD_RTSP */
    unsigned char marker: 1;	/* expect 1 */
#elif (BYTE_ORDER == BIG_ENDIAN)
    unsigned char marker: 1;
    unsigned char payload: 7;
#endif
    /* bytes 2, 3 */
    unsigned short seq_no;
    /* bytes 4-7 */
    unsigned int timestamp;
    /* bytes 8-11 */
    unsigned int ssrc;	/* stream number is used here. */
} RTP_header;

typedef int (*RTP_play_action)(RTP_session *sess);

void RTP_port_pool_init(int port);
int RTP_get_port_pair(port_pair *pair);
int RTP_release_port_pair(port_pair *pair);

int RTP_send_packet(RTP_session *session);
RTP_session *RTP_session_destroy(RTP_session *);

// RTP_transport functions
int RTP_transport_close(RTP_session *);
// low-level sent/receive packet functions depending on transport settings.
ssize_t RTP_sendto(RTP_session *, rtp_protos, unsigned char *, ssize_t);
ssize_t RTP_recv(RTP_session *, rtp_protos);

#endif