canvas_swap.html [180:241]:
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      if (!offer.sdp.match(/a=rtpmap:[0-9]+ H264/g)) {
        log("No H264 found in the offer!!!");
        return;
      }
    }
    if (requireg722.checked) {
      // to enforce the usage of G.722 we remove other codecs from the offer
      offer.sdp = removeNonG722(offer.sdp);
      pc1_offer = offer;
      log("G.722 only Offer: " + sdpPrettyPrint(offer.sdp));

      if (!offer.sdp.match(/a=rtpmap:[0-9]+ G722/g)) {
        log("No G722 found in the offer!!!");
        return;
      }
    }
    pc1.setLocalDescription(offer, step2, failed);
  }

  // replace CR NL with HTML breaks
  function sdpPrettyPrint(sdp) {
    return sdp.replace(/[\r\n]+/g, '<br>');
  }

  function h264StateChange(cb)
  {
    var h264opts = document.getElementById('divH264'); 
    if(cb.checked){
      h264opts.style.display = 'block'; 
    } else {
      h264opts.style.display = 'none';
    }
  }

  // Also remove mode 0 if it's offered
  // Note, we don't bother removing the fmtp lines, which makes a good test
  // for some SDP parsing issues.
  function removeVP8(sdp) {
    updated_sdp = sdp.replace("a=rtpmap:120 VP8/90000\r\n","");
    updated_sdp = updated_sdp.replace(/m=video ([0-9]+) RTP\/SAVPF ([0-9 ]*) 120/g, "m=video $1 RTP\/SAVPF $2");
    updated_sdp = updated_sdp.replace(/m=video ([0-9]+) RTP\/SAVPF 120([0-9 ]*)/g, "m=video $1 RTP\/SAVPF$2");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 nack\r\n","");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 nack pli\r\n","");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 ccm fir\r\n","");
    return updated_sdp;
  }

  // Remove anything that's not G.722 from the m=audio line
  function removeNonG722(sdp) {
    updated_sdp = sdp.replace(/m=audio ([0-9]+) RTP\/SAVPF ([0-9 ]*)/g, "m=audio $1 RTP\/SAVPF 9");
    return updated_sdp;
  }

  function preferMode0(sdp) {
    updated_sdp = updated_sdp.replace("126 97", "97 126");
    return updated_sdp;
  }

  // pc1.setLocal finished, call pc2.setRemote
  function step2() {
    pc1.onicecandidate = function(obj) {
      if (obj.candidate) {
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pc_test_fps.html [157:218]:
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      if (!offer.sdp.match(/a=rtpmap:[0-9]+ H264/g)) {
        log("No H264 found in the offer!!!");
        return;
      }
    }
    if (requireg722.checked) {
      // to enforce the usage of G.722 we remove other codecs from the offer
      offer.sdp = removeNonG722(offer.sdp);
      pc1_offer = offer;
      log("G.722 only Offer: " + sdpPrettyPrint(offer.sdp));

      if (!offer.sdp.match(/a=rtpmap:[0-9]+ G722/g)) {
        log("No G722 found in the offer!!!");
        return;
      }
    }
    pc1.setLocalDescription(offer, step2, failed);
  }

  // replace CR NL with HTML breaks
  function sdpPrettyPrint(sdp) {
    return sdp.replace(/[\r\n]+/g, '<br>');
  }

  function h264StateChange(cb)
  {
    var h264opts = document.getElementById('divH264'); 
    if(cb.checked){
      h264opts.style.display = 'block'; 
    } else {
      h264opts.style.display = 'none';
    }
  }

  // Also remove mode 0 if it's offered
  // Note, we don't bother removing the fmtp lines, which makes a good test
  // for some SDP parsing issues.
  function removeVP8(sdp) {
    updated_sdp = sdp.replace("a=rtpmap:120 VP8/90000\r\n","");
    updated_sdp = updated_sdp.replace(/m=video ([0-9]+) RTP\/SAVPF ([0-9 ]*) 120/g, "m=video $1 RTP\/SAVPF $2");
    updated_sdp = updated_sdp.replace(/m=video ([0-9]+) RTP\/SAVPF 120([0-9 ]*)/g, "m=video $1 RTP\/SAVPF$2");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 nack\r\n","");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 nack pli\r\n","");
    updated_sdp = updated_sdp.replace("a=rtcp-fb:120 ccm fir\r\n","");
    return updated_sdp;
  }

  // Remove anything that's not G.722 from the m=audio line
  function removeNonG722(sdp) {
    updated_sdp = sdp.replace(/m=audio ([0-9]+) RTP\/SAVPF ([0-9 ]*)/g, "m=audio $1 RTP\/SAVPF 9");
    return updated_sdp;
  }

  function preferMode0(sdp) {
    updated_sdp = updated_sdp.replace("126 97", "97 126");
    return updated_sdp;
  }

  // pc1.setLocal finished, call pc2.setRemote
  function step2() {
    pc1.onicecandidate = function(obj) {
      if (obj.candidate) {
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