rtsp.h

linux下的rtp的实例源代码

/* * 
 *  $Id: rtsp.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 _RTSPH	
#define _RTSPH

	#include <time.h>
	#include <config.h>
	#include <fenice/utils.h>
	#include <fenice/socket.h>
	#include <fenice/rtp.h>
	#include <fenice/rtcp.h>
	#include <fenice/mediainfo.h>
	#include <fenice/schedule.h>

	#define RTSP_BUFFERSIZE 4096

	/* Stati della macchina a stati del server rtsp*/
	#define INIT_STATE      0
	#define READY_STATE     1
	#define PLAY_STATE      2

	#define RTSP_VER "RTSP/1.0"

#define RTSP_EL "\r\n"
#define RTSP_RTP_AVP "RTP/AVP"
	
   	 typedef struct _RTSP_session {
    		//tsocket fd;
    		int cur_state;    	
    		int session_id;
    		RTP_session *rtp_session;
    		struct _RTSP_session *next;
    	} RTSP_session;
				
    	typedef struct _RTSP_buffer {
		tsocket fd;
		unsigned int port;
    		// Buffers    	
    		char in_buffer[RTSP_BUFFERSIZE];
    		unsigned int in_size;
    		char out_buffer[RTSP_BUFFERSIZE+MAX_DESCR_LENGTH];
    		int out_size;		
    		// Run-Time
    		unsigned int rtsp_cseq;
    		char descr[MAX_DESCR_LENGTH];		// La descrizione
    		RTSP_session *session_list;
    		struct _RTSP_buffer *next;
    	} RTSP_buffer;
    	
    	// Interfacce

    	void RTSP_state_machine(RTSP_buffer *rtsp,int method_code);
    	//Commuta di stato sulla base di rtsp->current_state e gestisce lo stato stesso.

    	int RTSP_describe(RTSP_buffer *rtsp);
    	//Non alloca nessuna risorsa. Risponde al client con la descrizione SDP della URL.

    	int RTSP_setup(RTSP_buffer *rtsp,RTSP_session **new_session);
    	//Alloca le risorse di uno stream.

    	int RTSP_play(RTSP_buffer *rtsp);
	// Riproduce uno stream sulla base dei parametri indicati.
	
	int RTSP_pause(RTSP_buffer *rtsp);
    	//Interrompe momentaneamente uno stream.

	int RTSP_teardown(RTSP_buffer *rtsp);
	// Termina uno stream
	
	int RTSP_options(RTSP_buffer *rtsp);

	int RTSP_handler(RTSP_buffer *rtsp);
	// RTSP input buffer parser routine. Return -1 on error.
		
	// RTSP parsing helper functions
#define RTSP_not_full 0
#define RTSP_method_rcvd 1
#define RTSP_interlvd_rcvd 2
	int RTSP_full_msg_rcvd(RTSP_buffer *rtsp, int *hdr_len, int *body_len);
	#define RTSP_msg_len RTSP_full_msg_rcvd
	void RTSP_discard_msg(RTSP_buffer *rtsp);
	void RTSP_remove_msg(int len,RTSP_buffer *rtsp);
//	void RTSP_msg_len(int *hdr_len,int *body_len,RTSP_buffer *rtsp);	
	int RTSP_valid_response_msg(unsigned short *status,char *msg,RTSP_buffer *rtsp);
	int RTSP_validate_method(RTSP_buffer * rtsp);	
	void RTSP_initserver(RTSP_buffer *rtsp,tsocket fd);
	
	// DESCRIBE	
	int send_describe_reply(RTSP_buffer *rtsp,char *object,description_format descr_format,char *descr);
	
	// REDIRECT 3xx
	uint32 send_redirect_3xx(RTSP_buffer *, char *);
	
	// SETUP
	int send_setup_reply(RTSP_buffer *rtsp,RTSP_session *session, SD_descr *descr,RTP_session *sp2);
	
	// TEARDOWN
	int send_teardown_reply(RTSP_buffer *rtsp,long session_id,long cseq);

	// PLAY
	int send_play_reply(RTSP_buffer *rtsp,char *object,RTSP_session *rtsp_session);

	// PAUSE
	int send_pause_reply(RTSP_buffer *rtsp,RTSP_session *rtsp_session);
	
	// OPTIONS
	int send_options_reply(RTSP_buffer *rtsp,long cseq);

	// messages functions
	int max_connection();
	char *get_stat(int err);
	int send_reply(int err, char *addon ,RTSP_buffer *rtsp);
	int bwrite(char *buffer,unsigned short len,RTSP_buffer *rtsp);
	void add_time_stamp(char *b,int crlf);

#endif