Created
February 16, 2016 17:29
-
-
Save xlphs/96fed27f1be4842fed24 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <html> | |
| <head> | |
| <title>SDP Rewrite Test</title> | |
| </head> | |
| <body> | |
| <textarea rows="20" cols="80" id="sdp"> | |
| v=0 | |
| o=- 9085987410276364131 2 IN IP4 127.0.0.1 | |
| s=- | |
| t=0 0 | |
| a=group:BUNDLE audio video | |
| a=msid-semantic: WMS | |
| m=audio 9 UDP/TLS/RTP/SAVPF 111 103 104 9 0 8 106 105 13 126 | |
| c=IN IP4 0.0.0.0 | |
| a=rtcp:9 IN IP4 0.0.0.0 | |
| a=ice-ufrag:kpij9ZBZDz4eSOuL | |
| a=ice-pwd:0IvC2V32/ojX6rWax4SFZPSY | |
| a=fingerprint:sha-256 3D:C3:B4:92:93:FF:C2:ED:E9:5D:65:DF:05:9A:99:3C:A9:2C:9F:8F:41:33:02:02:71:08:01:60:8E:14:C7:D8 | |
| a=setup:actpass | |
| a=mid:audio | |
| a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level | |
| a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time | |
| a=recvonly | |
| a=rtcp-mux | |
| a=rtpmap:111 opus/48000/2 | |
| a=fmtp:111 minptime=10; useinbandfec=1 | |
| a=rtpmap:103 ISAC/16000 | |
| a=rtpmap:104 ISAC/32000 | |
| a=rtpmap:9 G722/8000 | |
| a=rtpmap:0 PCMU/8000 | |
| a=rtpmap:8 PCMA/8000 | |
| a=rtpmap:106 CN/32000 | |
| a=rtpmap:105 CN/16000 | |
| a=rtpmap:13 CN/8000 | |
| a=rtpmap:126 telephone-event/8000 | |
| a=maxptime:60 | |
| m=video 9 UDP/TLS/RTP/SAVPF 100 101 116 117 96 126 | |
| c=IN IP4 0.0.0.0 | |
| a=rtcp:9 IN IP4 0.0.0.0 | |
| a=ice-ufrag:kpij9ZBZDz4eSOuL | |
| a=ice-pwd:0IvC2V32/ojX6rWax4SFZPSY | |
| a=fingerprint:sha-256 3D:C3:B4:92:93:FF:C2:ED:E9:5D:65:DF:05:9A:99:3C:A9:2C:9F:8F:41:33:02:02:71:08:01:60:8E:14:C7:D8 | |
| a=setup:actpass | |
| a=mid:video | |
| a=extmap:2 urn:ietf:params:rtp-hdrext:toffset | |
| a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time | |
| a=extmap:4 urn:3gpp:video-orientation | |
| a=recvonly | |
| a=rtcp-mux | |
| a=rtpmap:100 VP8/90000 | |
| a=rtcp-fb:100 ccm fir | |
| a=rtcp-fb:100 nack | |
| a=rtcp-fb:100 nack pli | |
| a=rtcp-fb:100 goog-remb | |
| a=rtpmap:101 VP9/90000 | |
| a=rtcp-fb:101 ccm fir | |
| a=rtcp-fb:101 nack | |
| a=rtcp-fb:101 nack pli | |
| a=rtcp-fb:101 goog-remb | |
| a=rtpmap:126 H264/90000 | |
| a=rtpmap:116 red/90000 | |
| a=rtpmap:117 ulpfec/90000 | |
| a=rtpmap:96 rtx/90000 | |
| a=fmtp:96 apt=100</textarea> | |
| <br> | |
| <button onclick="updateSdp()">Rewrite</button> | |
| <script type="text/javascript"> | |
| function updateSdp(sdpOffer) { | |
| document.getElementById('sdp').value = rewriteSdpOffer(document.getElementById('sdp').value); | |
| } | |
| function rewriteSdpOffer(sdpOffer) { | |
| // find the line starting with 'm=video' | |
| var lines = sdpOffer.split("\n"); | |
| var mvideoIdx = -1; | |
| for (var i=0; i<lines.length; i++) { | |
| if (lines[i].indexOf("m=video") != -1) { | |
| mvideoIdx = i; | |
| break; | |
| } | |
| } | |
| if (mvideoIdx == -1) return; | |
| var rtpmapTokens = lines[mvideoIdx].split(" "); | |
| if (rtpmapTokens.length < 4) return; | |
| var getRtpMapLine = function(token) { | |
| for (var i=mvideoIdx+1; i<lines.length; i++) { | |
| if (lines[i].indexOf(token) != -1) { | |
| return lines[i]; | |
| } | |
| } | |
| }; | |
| var allowedRtpmapTokens = []; | |
| var unwantedRtpmapToken = []; | |
| for (var i=3; i<rtpmapTokens.length; i++) { | |
| var line = getRtpMapLine(rtpmapTokens[i]); | |
| if (line.indexOf("H264/9000") != -1) { | |
| allowedRtpmapTokens.push(rtpmapTokens[i]); | |
| } else { | |
| unwantedRtpmapToken.push(rtpmapTokens[i]); | |
| } | |
| } | |
| if (allowedRtpmapTokens.length == 0) return; | |
| // remove unwanted codec from m=video line | |
| for (var i=3; i<rtpmapTokens.length; i++) { | |
| if (allowedRtpmapTokens.indexOf(rtpmapTokens[i]) == -1) { | |
| rtpmapTokens.splice(i, 1); | |
| i = 3; | |
| } | |
| } | |
| if (allowedRtpmapTokens.indexOf(rtpmapTokens[3]) == -1) { | |
| rtpmapTokens.splice(3, 1); | |
| } | |
| lines[mvideoIdx] = rtpmapTokens.join(" "); | |
| // delete unwanted rtpmap lines | |
| var isUnwanted = function(rtpmapLine) { | |
| if ((rtpmapLine.substr(0, 9) == "a=rtpmap:" || | |
| rtpmapLine.substr(0, 10) == "a=rtcp-fb:")) | |
| { | |
| for (var i=0; i<unwantedRtpmapToken.length; i++) { | |
| if (rtpmapLine.indexOf(unwantedRtpmapToken[i]) != -1) return true; | |
| } | |
| } | |
| return false; | |
| }; | |
| for (var i=mvideoIdx+1; i<lines.length; i++) { | |
| if (isUnwanted(lines[i])) { | |
| lines.splice(i, 1); | |
| i = mvideoIdx + 1; | |
| } | |
| } | |
| return lines.join("\n"); | |
| } | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment