sdp - npm Package Compare versions

Comparing version 1.1.3 to 1.2.0

package.json

 {
   "name": "sdp",
-  "version": "1.1.3",
+  "version": "1.2.0",
   "description": "SDP parsing and serialization utilities",
@@ -5,0 +5,0 @@ "main": "sdp.js",

sdp.js

@@ -435,2 +435,24 @@ /* eslint-env node */
 
+// parses either a=msid: or a=ssrc:... msid lines an returns
+// the id of the MediaStream and MediaStreamTrack.
+SDPUtils.parseMsid = function(mediaSection) {
+  var parts;
+  var spec = SDPUtils.matchPrefix(mediaSection, 'a=msid:');
+  if (spec.length === 1) {
+    parts = spec[0].substr(7).split(' ');
+    return {stream: parts[0], track: parts[1]};
+  }
+  var planB = SDPUtils.matchPrefix(mediaSection, 'a=ssrc:')
+  .map(function(line) {
+    return SDPUtils.parseSsrcMedia(line);
+  })
+  .filter(function(parts) {
+    return parts.attribute === 'msid';
+  });
+  if (planB.length > 0) {
+    parts = planB[0].value.split(' ');
+    return {stream: parts[0], track: parts[1]};
+  }
+};
+
 SDPUtils.writeSessionBoilerplate = function() {
@@ -468,7 +490,9 @@ // FIXME: sess-id should be an NTP timestamp.
 
-  // FIXME: for RTX there might be multiple SSRCs. Not implemented in Edge yet.
   if (transceiver.rtpSender) {
+    // spec.
     var msid = 'msid:' + stream.id + ' ' +
         transceiver.rtpSender.track.id + '\r\n';
     sdp += 'a=' + msid;
+
+    // for Chrome.
     sdp += 'a=ssrc:' + transceiver.sendEncodingParameters[0].ssrc +
@@ -475,0 +499,0 @@ ' ' + msid;

test/sdp.js

@@ -186,5 +186,16 @@ /* jshint node: true */
     'a=rtcp-fb:100 nack\r\n';
-  console.log(SDPUtils.writeRtcpFb(codec));
   t.ok(SDPUtils.writeRtcpFb(codec) === expected, 'wrote rtcp-fb');
   t.end();
 });
+
+test('parseMsid', function(t) {
+  var spec = 'a=msid:sid tid\r\n';
+  var planB = 'a=ssrc:1 cname:V\r\n' +
+      'a=ssrc:1 msid:sid tid\r\n';
+  t.ok(SDPUtils.parseMsid(spec).stream === 'sid', 'parsed spec stream id');
+  t.ok(SDPUtils.parseMsid(spec).track === 'tid', 'parsed track stream id');
+
+  t.ok(SDPUtils.parseMsid(planB).stream === 'sid', 'parsed plan B stream id');
+  t.ok(SDPUtils.parseMsid(planB).track === 'tid', 'parsed plan B track id');
+  t.end();
+});

No alert changes

Improved metrics

Total package byte prevSize

25945

increased by4.23%

Lines of code

669

increased by4.86%

No dependency changes