payloadtype.c

来自「linphone源码-1.3.5.tar.gz,linphone源码-1.3.5」· C语言 代码 · 共 298 行

/*
  The oRTP library is an RTP (Realtime Transport Protocol - rfc1889) stack.
  Copyright (C) 2001  Simon MORLAT [e-mail]

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "ortp/ortp.h"
#include "ortp/payloadtype.h"

/**
 *rtp_profile_clear_all:
 *@profile: an RTP profile (#RtpProfile object)
 *
 *	Initialize the profile to the empty profile (all payload type are unassigned).
 *
**/

/**
 *rtp_profile_set_name:
 *@profile: 	a rtp profile object (#RtpProfile)
 *@nm:			a string
 *
 *	Set a name to the rtp profile. (This is not required)
 *
**/

/**
 *rtp_profile_get_name:
 *@profile:		a rtp profile object (#RtpProfile)
 *
 *Returns:	the name of the rtp profile. May be NULL.
**/

/**
 *rtp_profile_set_payload:
 *@profile: an RTP profile (a #RtpProfile object)
 *@index:	the payload type number
 *@pt:		the payload type description (a #PayloadType object )
 *
 *	Assign payload type number @index to payload type desribed in @pt for the RTP profile
 *	@profile.
 *
**/

/**
 *rtp_profile_get_payload:
 *@profile:	an RTP profile (a #RtpProfile object)
 *@index:	the payload type number
 *
 *	Gets the payload description of the payload type @index in the profile @profile.
 *
 *Returns: the payload description (a #PayloadType object)
**/

/**
 *rtp_profile_clear_payload:
 *@profile:	an RTP profile (a #RtpProfile object)
 *@index:	the payload type number
 *
 *	Set payload type number @index unassigned in profile @profile.
 *
**/

char *payload_type_get_rtpmap(PayloadType *pt)
{
	int len=(int)strlen(pt->mime_type)+15;
	char *rtpmap=(char *) ortp_malloc(len);
	snprintf(rtpmap,len,"%s/%i/1",pt->mime_type,pt->clock_rate);
	return rtpmap;
}

PayloadType *payload_type_new()
{
	PayloadType *newpayload=ortp_new0(PayloadType,1);
	newpayload->flags|=PAYLOAD_TYPE_ALLOCATED;
	return newpayload;
}


PayloadType *payload_type_clone(PayloadType *payload)
{
	PayloadType *newpayload=ortp_new0(PayloadType,1);
	memcpy(newpayload,payload,sizeof(PayloadType));
	newpayload->mime_type=ortp_strdup(payload->mime_type);
	if (payload->recv_fmtp!=NULL) newpayload->recv_fmtp=ortp_strdup(payload->recv_fmtp);
	if (payload->send_fmtp!=NULL) newpayload->send_fmtp=ortp_strdup(payload->send_fmtp);
	newpayload->flags|=PAYLOAD_TYPE_ALLOCATED;
	return newpayload;
}

static bool_t canWrite(PayloadType *pt){
	if (!(pt->flags & PAYLOAD_TYPE_ALLOCATED)) {
		ortp_error("Cannot change parameters of statically defined payload types: make your"
			" own copy using payload_type_clone() first.");
		return FALSE;
	}
	return TRUE;
}

void payload_type_set_recv_fmtp(PayloadType *pt, const char *fmtp){
	if (canWrite(pt)){
		if (pt->recv_fmtp!=NULL) ortp_free(pt->recv_fmtp);
		if (fmtp!=NULL) pt->recv_fmtp=ortp_strdup(fmtp);
		else pt->recv_fmtp=NULL;
	}
}
	
void payload_type_set_send_fmtp(PayloadType *pt, const char *fmtp){
	if (canWrite(pt)){
		if (pt->send_fmtp!=NULL) ortp_free(pt->send_fmtp);
		if (fmtp!=NULL) pt->send_fmtp=ortp_strdup(fmtp);
		else pt->send_fmtp=NULL;
	}
}

void payload_type_destroy(PayloadType *pt)
{
	if (pt->mime_type) ortp_free(pt->mime_type);
	if (pt->recv_fmtp) ortp_free(pt->recv_fmtp);
	if (pt->send_fmtp) ortp_free(pt->send_fmtp);
	ortp_free(pt);
}

int rtp_profile_get_payload_number_from_mime(RtpProfile *profile,const char *mime)
{
	PayloadType *pt;
	int i;
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++)
	{
		pt=rtp_profile_get_payload(profile,i);
		if (pt!=NULL)
		{
			if (strcasecmp(pt->mime_type,mime)==0){
				return i;
			}
		}
	}
	return -1;
}

int rtp_profile_find_payload_number(RtpProfile*profile,const char *mime,int rate)
{
	int i;
	PayloadType *pt;
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++)
	{
		pt=rtp_profile_get_payload(profile,i);
		if (pt!=NULL)
		{
			if (strcasecmp(pt->mime_type,mime)==0 && pt->clock_rate==rate){
			
				return i;
			}
		}
	}
	return -1;
}

int rtp_profile_get_payload_number_from_rtpmap(RtpProfile *profile,const char *rtpmap)
{
	int clock_rate,ret;
	char *p,*mime,*tmp,*c;
	
	/* parse the rtpmap */
	tmp=ortp_strdup(rtpmap);
	p=strchr(tmp,'/');
	if (p!=NULL){
		mime=tmp;
		*p='\0';
		c=p+1;
		p=strchr(c,'/');
		if (p!=NULL) *p='\0';
		clock_rate=atoi(c);
	}else return -1;
	
	//printf("Searching for payload %s at freq %i",mime,clock_rate);
	ret=rtp_profile_find_payload_number(profile,mime,clock_rate);
	ortp_free(tmp);
	return ret;
}

PayloadType * rtp_profile_find_payload(RtpProfile *prof,const char *mime,int rate)
{
	int i;
	i=rtp_profile_find_payload_number(prof,mime,rate);
	if (i>=0) return rtp_profile_get_payload(prof,i);
	return NULL;
}


PayloadType * rtp_profile_get_payload_from_mime(RtpProfile *profile,const char *mime)
{
	int pt;
	pt=rtp_profile_get_payload_number_from_mime(profile,mime);
	if (pt==-1) return NULL;
	else return rtp_profile_get_payload(profile,pt);
}


PayloadType * rtp_profile_get_payload_from_rtpmap(RtpProfile *profile, const char *rtpmap)
{
	int pt;
	pt=rtp_profile_get_payload_number_from_rtpmap(profile,rtpmap);
	if (pt==-1) return NULL;
	else return rtp_profile_get_payload(profile,pt);
}

int rtp_profile_move_payload(RtpProfile *prof,int oldpos,int newpos){
	prof->payload[newpos]=prof->payload[oldpos];
	prof->payload[oldpos]=NULL;
	return 0;
}

RtpProfile * rtp_profile_new(const char *name)
{
	RtpProfile *prof=ortp_new0(RtpProfile,1);
	rtp_profile_set_name(prof,name);
	return prof;
}

void rtp_profile_set_payload(RtpProfile *prof, int index, PayloadType *pt){
	if (index<0 || index>=RTP_PROFILE_MAX_PAYLOADS) {
		ortp_error("Bad index %i",index);
		return;
	}
	prof->payload[index]=pt;
}

void rtp_profile_clear_all(RtpProfile *obj){
	int i;
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++){
		obj->payload[i]=0;
	}
}

void rtp_profile_set_name(RtpProfile *obj, const char *name){
	if (obj->name!=NULL) ortp_free(obj->name);
	obj->name=ortp_strdup(name);
}

/* ! payload are not cloned*/
RtpProfile * rtp_profile_clone(RtpProfile *prof)
{
	int i;
	PayloadType *pt;
	RtpProfile *newprof=rtp_profile_new(prof->name);
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++){
		pt=rtp_profile_get_payload(prof,i);
		if (pt!=NULL){
			rtp_profile_set_payload(newprof,i,pt);
		}
	}
	return newprof;
}


/*clone a profile and its payloads */
RtpProfile * rtp_profile_clone_full(RtpProfile *prof)
{
	int i;
	PayloadType *pt;
	RtpProfile *newprof=rtp_profile_new(prof->name);
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++){
		pt=rtp_profile_get_payload(prof,i);
		if (pt!=NULL){
			rtp_profile_set_payload(newprof,i,payload_type_clone(pt));
		}
	}
	return newprof;
}

void rtp_profile_destroy(RtpProfile *prof)
{
	int i;
	PayloadType *payload;
	if (prof->name) ortp_free(prof->name);
	for (i=0;i<RTP_PROFILE_MAX_PAYLOADS;i++)
	{
		payload=rtp_profile_get_payload(prof,i);
		if (payload!=NULL && (payload->flags & PAYLOAD_TYPE_ALLOCATED))
			payload_type_destroy(payload);
	}
	ortp_free(prof);
}