Support for MRCP related parameters

[MayamaTakeshi]

Hi,
currently this parser marks MRCP related parameters as invalid:

SDP in SIP INVITE:

$ cat sdp_mrcp_request.js 
const sdpTransform = require('sdp-transform');

const sdpStr = "v=0\r\n\
o=FreeSWITCH 5772550679930491611 4608916746797952899 IN IP4 192.168.88.74\r\n\
s=-\r\n\
c=IN IP4 192.168.88.74\r\n\
t=0 0\r\n\
m=application 9 TCP/MRCPv2 1\r\n\
a=setup:active\r\n\
a=connection:new\r\n\
a=resource:speechsynth\r\n\
a=cmid:1\r\n\
m=audio 14238 RTP/AVP 0 8 96\r\n\
a=rtpmap:0 PCMU/8000\r\n\
a=rtpmap:8 PCMA/8000\r\n\
a=rtpmap:96 L16/8000\r\n\
a=recvonly\r\n\
a=mid:1\r\n\
";
 
const res = sdpTransform.parse(sdpStr);
console.log(res)

console.log("media[0].invalid:")
console.log(res.media[0].invalid)

$ node sdp_mrcp_request.js 
{ version: 0,
  origin:
   { username: 'FreeSWITCH',
     sessionId: '5772550679930491611',
     sessionVersion: '4608916746797952899',
     netType: 'IN',
     ipVer: 4,
     address: '192.168.88.74' },
  name: '-',
  connection: { version: 4, ip: '192.168.88.74' },
  timing: { start: 0, stop: 0 },
  media:
   [ { rtp: [],
       fmtp: [],
       type: 'application',
       port: 9,
       protocol: 'TCP/MRCPv2',
       payloads: 1,
       setup: 'active',
       connectionType: 'new',
       invalid: [Array] },
     { rtp: [Array],
       fmtp: [],
       type: 'audio',
       port: 14238,
       protocol: 'RTP/AVP',
       payloads: '0 8 96',
       direction: 'recvonly',
       mid: 1 } ] }
media[0].invalid:
[ { value: 'resource:speechsynth' }, { value: 'cmid:1' } ]

SDP in SIP Response:

$ cat sdp_mrcp_response.js 
const sdpTransform = require('sdp-transform');

const sdpStr = "v=0\r\n\
o=UniMRCPServer 1212606071011504954 4868540303632141964 IN IP4 192.168.88.136\r\n\
s=-\r\n\
c=IN IP4 192.168.88.136\r\n\
t=0 0\r\n\
m=application 1544 TCP/MRCPv2 1\r\n\
a=setup:passive\r\n\
a=connection:new\r\n\
a=channel:1228fd00945a4963@speechsynth\r\n\
a=cmid:1\r\n\
m=audio 5860 RTP/AVP 0\r\n\
a=rtpmap:0 PCMU/8000\r\n\
a=sendonly\r\n\
a=mid:1\r\n\
";
 
const res = sdpTransform.parse(sdpStr);
console.log(res)

console.log("media[0].invalid:")
console.log(res.media[0].invalid)


$ node sdp_mrcp_response.js 
{ version: 0,
  origin:
   { username: 'UniMRCPServer',
     sessionId: '1212606071011504954',
     sessionVersion: '4868540303632141964',
     netType: 'IN',
     ipVer: 4,
     address: '192.168.88.136' },
  name: '-',
  connection: { version: 4, ip: '192.168.88.136' },
  timing: { start: 0, stop: 0 },
  media:
   [ { rtp: [],
       fmtp: [],
       type: 'application',
       port: 1544,
       protocol: 'TCP/MRCPv2',
       payloads: 1,
       setup: 'passive',
       connectionType: 'new',
       invalid: [Array] },
     { rtp: [Array],
       fmtp: [],
       type: 'audio',
       port: 5860,
       protocol: 'RTP/AVP',
       payloads: 0,
       direction: 'sendonly',
       mid: 1 } ] }
media[0].invalid:
[ { value: 'channel:1228fd00945a4963@speechsynth' },
  { value: 'cmid:1' } ]

Would it be possible to add support for parameters 'resource', 'channel' and 'cmid' ?

[hyavari]

This has been addressed in this request: #100