forked from mirrors/linphone-iphone
101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
/*
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* Linphone is sip (RFC3261) compatible internet phone.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef SDP_HANDLER_H
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#define SDP_HANDLER_H
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#include <osipparser2/sdp_message.h>
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#include "linphonecore.h"
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typedef struct _sdp_payload
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{
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int line; /* the index of the m= line */
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int pt; /*payload type */
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int localport;
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int remoteport;
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int b_as_bandwidth; /* application specific bandwidth */
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char *proto;
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char *c_nettype;
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char *c_addrtype;
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char *c_addr;
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char *c_addr_multicast_ttl;
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char *c_addr_multicast_int;
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char *a_rtpmap;
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char *a_fmtp;
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char *relay_host;
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int relay_port;
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char *relay_session_id;
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int a_ptime;
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} sdp_payload_t;
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typedef struct _sdp_context sdp_context_t;
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typedef int (*sdp_handler_read_codec_func_t) (struct _sdp_context *,
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sdp_payload_t *);
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typedef int (*sdp_handler_write_codec_func_t) (struct _sdp_context *);
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typedef struct _sdp_handler
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{
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sdp_handler_read_codec_func_t accept_audio_codecs; /*from remote sdp */
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sdp_handler_read_codec_func_t accept_video_codecs; /*from remote sdp */
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sdp_handler_write_codec_func_t set_audio_codecs; /*to local sdp */
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sdp_handler_write_codec_func_t set_video_codecs; /*to local sdp */
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sdp_handler_read_codec_func_t get_audio_codecs; /*from incoming answer */
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sdp_handler_read_codec_func_t get_video_codecs; /*from incoming answer */
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} sdp_handler_t;
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typedef enum _sdp_context_state
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{
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SDP_CONTEXT_STATE_INIT,
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SDP_CONTEXT_STATE_NEGOCIATION_OPENED,
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SDP_CONTEXT_STATE_NEGOCIATION_CLOSED
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} sdp_context_state_t;
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struct _sdp_context
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{
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sdp_handler_t *handler;
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char *localip;
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char *username;
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void *reference;
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sdp_message_t *offer; /* the local sdp to be used for outgoing request */
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char *offerstr;
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sdp_message_t *answer; /* the local sdp generated from an inc request */
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char *answerstr;
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char *relay;
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char *relay_session_id;
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int negoc_status; /* in sip code */
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int incb;
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sdp_context_state_t state;
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};
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/* create a context for a sdp negociation: localip is the ip address to be used in the sdp message, can
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be a firewall address.
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It can be null when negociating for an incoming offer; In that case it will be guessed. */
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sdp_context_t *sdp_handler_create_context(sdp_handler_t *handler, const char *localip, const char *username, const char *relay);
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void sdp_context_set_user_pointer(sdp_context_t * ctx, void* up);
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void *sdp_context_get_user_pointer(sdp_context_t * ctx);
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void sdp_context_add_audio_payload( sdp_context_t * ctx, sdp_payload_t * payload);
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void sdp_context_add_video_payload( sdp_context_t * ctx, sdp_payload_t * payload);
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char * sdp_context_get_offer(sdp_context_t *ctx);
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char * sdp_context_get_answer(sdp_context_t* ctx, sdp_message_t *remote_offer);
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int sdp_context_get_status(sdp_context_t* ctx);
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void sdp_context_read_answer(sdp_context_t *ctx, sdp_message_t *remote_answer);
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void sdp_context_free(sdp_context_t *ctx);
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int sdp_payload_init (sdp_payload_t * payload);
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#endif
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