rtp.h

rtsp服务器代码 支持多种文件格式,需要添加信格式,自行书写 loadmedia readmedia freemedia即可

/* * 
 *  $Id: rtp.h 351 2006-06-01 17:58:07Z shawill $
 *  
 *  This file is part of Fenice
 *
 *  Fenice -- Open Media Server
 *
 *  Copyright (C) 2004 by
 *  	
 *	- Giampaolo Mancini	<[e-mail]>
 *	- Francesco Varano	<[e-mail]>
 *	- Marco Penno		<[e-mail]>
 *	- Federico Ridolfo	<[e-mail]>
 *	- Eugenio Menegatti 	<[e-mail]>
 *	- Stefano Cau
 *	- Giuliano Emma
 *	- Stefano Oldrini
 * 
 *  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 <time.h>
#include <sys/timeb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fenice/socket.h>
#include <fenice/mediainfo.h>
#include <fenice/bufferpool.h>
#include <fenice/types.h>
#include <fenice/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 _RTP_transport {
        enum {
            RTP_no_transport=0,
            RTP_rtp_avp,
            RTP_rtp_avp_tcp
        } 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 {
                port_pair interleaved;
            } tcp;
            // 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;

    double mprev_tx_time;
    unsigned int PreviousCount;
    short MinimumReached;
    short MaximumReached;
    
    int sched_id;
    unsigned int start_seq;

    unsigned int start_rtptime;    

    unsigned char pause;
    unsigned char started;

    unsigned int seq;
    unsigned int ssrc;

    char sd_filename[255];
    media_entry *current_media;
    SD_descr *sd_descr;

    OMSConsumer *cons;
    RTCP_stats rtcp_stats[2]; 
    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 *);

// 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