sdp.h

来自「AMLOGIC DPF source code」· C头文件 代码 · 共 177 行

/*******************************************************************
 * 
 *  Copyright C 2005 by Amlogic, Inc. All Rights Reserved.
 *
 *  Description: 
 *
 *  Author: Amlogic Software
 *  Created: Fri Nov 11 00:55:00 2005
 *
 *******************************************************************/
/*
 * FILE:   sdp.h
 * AUTHOR: Ivan R. Judson <[e-mail]>
 *
 * $Revision: 1.1 $ 
 * $Date: 2003/05/28 11:03:37 $
 * 
 * Copyright (c) 2002 Argonne National Laboratory/University of Chicago
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions 
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the Mathematics and 
 *      Computer Science Division of Argonne National Laboratory.
 * 4. Neither the name of the University nor of the Department may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _SDP_H
#define _SDP_H

#if defined(__cplusplus)
extern "C" {
#endif
    /* Maximum SDP text file size we'll accept */
#define MAX_SDP_SIZE 2048

    typedef enum {
        RTP_MEDIA_VIDEO,
        RTP_MEDIA_AUDIO,
        RTP_MEDIA_APP,
        RTP_MEDIA_UNKNOWN,
    } rtp_media_t;

    typedef struct sdp_network {
        char *network_type;
        char *address_type;
        char *address;
        int number_of_addresses;
    } sdp_network;

    typedef struct sdp_attribute {
        struct sdp_attribute *next;
        char *key;
        char *value;
    } sdp_attribute;

    typedef struct sdp_encryption {
        char *method;
        char *key;
    } sdp_encryption;

    typedef struct sdp_bandwidth_modifier {
        char *modifier;
        char *value;
    } sdp_bandwidth_modifier;

    typedef struct sdp_media {
        struct sdp_media *next;
        rtp_media_t media_type;
        char *name;           /* audio | video | applicaton */
        int port;             /* "Suggested" port */
        int number_of_ports;  /*  Should just be 1 */
        sdp_network *network;
        char *transport;
        char *format_list;
        int fmt;

        char  rtpmap_fmt; /* Format number from rtpmap attrib */
        char *rtpmap_name;/* Format name from rtpmap attrib */
        int   rtpmap_rate;/* rate from rtpmap attrib */

        char *control; /* Control attribute */
        char *information;
        sdp_bandwidth_modifier *bandwidth_modifier;
        sdp_encryption *encryption;
        sdp_attribute *attributes;
    } sdp_media;

    typedef struct sdp_timezone {
        struct sdp_timezone *next;
        long adjustment;
        long offset;
    } sdp_timezone;

    typedef struct sdp_repeat {
        struct sdp_repeat *next;
        char *interval;
        char *duration;
        char *offsets;
    } sdp_repeat;

    typedef struct sdp {
        int protocol_version;

        /* o (origin) line */
        char *username;
        char *session_id;
        long version;
        sdp_network *origin_network;

        char *name;
        char *information;
        char *uri;
        char *email;
        char *phone;
        sdp_network *network;

        char *control; /* Session level control attribute a=control:* */
        sdp_bandwidth_modifier *bandwidth_modifier;
        sdp_timezone *timezones;
        sdp_encryption *encryption;
        sdp_attribute *attributes;

        long start_time;
        long stop_time;
        sdp_repeat *repeats;

        sdp_media *media;

        char *original;
        int   original_len;
    } sdp;


    sdp *sdp_parse(char *sdp_string);

    void sdp_print(sdp *session); 
    void sdp_print_media(sdp_media *media);
    void sdp_print_network(sdp_network *network);

    char *sdp_make(sdp *session);;

    void sdp_free(sdp *session);
    void sdp_free_media(sdp_media *media);
    void sdp_free_attribute(sdp_attribute *attr);
    void sdp_free_encryption(sdp_encryption *encr);
    void sdp_free_bandwidth_modifier(sdp_bandwidth_modifier *bwm);
    void sdp_free_repeat(sdp_repeat *repeat);
    void sdp_free_network(sdp_network *network);

#if defined(__cplusplus)
}
#endif

#endif