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Effort to Reverse Engineer WebSDR @ Twente
Raw
01 - Reverse Engineer WebSDR @ Twente WebSocket Audio to SDR IQ.md

Trying to figure out how to capture the audio from the WebSDR @ Twente.

http://websdr.ewi.utwente.nl:8901

Mirror the websdr site

wget --mirror http://websdr.ewi.utwente.nl:8901

Current Efforts

The ruby script will successfully pull down the audio IQ, however the IQ cannot be played in Audacity. I believe this is because the audio is encoded or otherwise slightly mangled to deter us.

To figure this out, I am deobfuscating the websdr-sound.js that handles the data coming in from the WebSocket from the server to see what they are doing to be able to play it with HTML5's AudioContext.

I have also decompiled the Java Applet version of the sound player websdrsound.class that is optionally used if the user's browser cannot do HTML5 Audio.

Raw
02 - retrieve_from_websocket.rb
require 'faye/websocket'
require 'eventmachine'
frequency = "1010"
band = "0"
EM.run {
output = nil
ws = Faye::WebSocket::Client.new('ws://websdr.ewi.utwente.nl:8901/~~stream?v=11', [], headers: {
'Connection' => 'Upgrade',
'Host' => 'websdr.ewi.utwente.nl:8901',
'Origin' => 'http://websdr.ewi.utwente.nl:8901',
'Cookie' => 'view=2; ID=5d83b2fd9c13',
'Pragma' => 'no-cache',
'Cache-Control' => 'no-cache',
'Sec-WebSocket-Key' => 'K+3pZ6WnO+JMDVF5CX4J+w==',
'Sec-WebSocket-Version' => '13',
'Sec-WebSocket-Extensions' => 'x-webkit-deflate-frame',
'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0 Safari/605.1.15'
})
ws.on :open do |event|
puts "WebSocket connected, sending params to set the tuner..."
pcm_output = File.open('pcm', 'wb')
ws.send("GET /~~param?f=#{frequency}&band=#{band}&lo=-4dd.5&hi=4.5&mode=1&name=")
end
ws.on :message do |event|
puts "Received #{event.data.size} bytes"
event.data.each do |byte|
pcm_output.print byte.chr
end
# p [:message, event.data]
end
ws.on :close do |event|
pcm_output.close
puts "Closed."
ws = nil
end
}
Raw
03 - websdr-sound.js
// Originally from http://websdr.ewi.utwente.nl:8901/websdr-sound.js
// Effort made to de-obfuscate
//WebSDR HTML5 client side - Copyright 2013-2020, pa3fwm@websdr.org - all rights reserved
//Since the intended use of this code involves sending a copy to the client computer, I (PA3FWM) hereby allow making it available unmodified, via my original WebSDR server software, to original WebSDR clients. Other use, including distribution in part or entirety or as part of other software, or reverse engineering, is not allowed without my explicit prior permission.
(function () {
var h = null,
AudioContext = window.AudioContext || window.webkitAudioContext;
if (AudioContext) {
document.audioContext || (document.audioContext = new AudioContext());
var convolver;
try {
convolver = document.audioContext.createConvolver;
} catch (wa) {}
convolver || ((document.audioContext = h), (sup_webaudio = !1));
}
var F = 32768;
function za() {
function processEvent(audioProcessEvent) {
var channelData = audioProcessEvent.outputBuffer.getChannelData(0),
bufferIndex;
var timeDifference;
var bufferLength = audioProcessEvent.outputBuffer.length;
processStartTime = new Date().getTime();
if (ha || 2 <= P)
(ha = 0),
3 < P && (P = 0),
(channelData = p),
(timeDifference = processStartTime - wsMessageReceiveTime),
0 <= R && ((R = -1), (actualRemoteSampleRate *= remoteSampleRate / v), (v = remoteSampleRate)),
(p = qa + (timeDifference / 1e3) * remoteSampleRate - H * remoteSampleRate - (bufferLength * v) / audioSampleRate),
(p = Math.round(p)),
(p = (2 * F + p) % F);
200 < processStartTime - lastProcessTime && 0 < lastProcessTime && (ha = 1);
lastProcessTime = processStartTime;
for (bufferIndex = 0; bufferIndex < bufferLength; bufferIndex++) {
var d = 0,
f = (x * v) / audioSampleRate;
q += f;
1 <= q
? ((q -= 1),
(y[p] = 0),
p++,
p >= F && (p -= F),
p == R && ((R = -1), (actualRemoteSampleRate *= remoteSampleRate / v), (v = remoteSampleRate)),
p == g && (P = 1),
(d = q / f),
(d *= y[p]),
(d /= f))
: q < 2 * f && ((d = (2 * f - q) / f), (d *= y[p]), (d /= f));
muted && (d = 0);
channelData[bufferIndex] = 2e-5 * d * volume;
}
M += (1e3 * bufferLength) / actualAudioSampleRate;
processStartTime < M && (M = processStartTime);
V += bufferLength;
V >= audioSampleRate &&
((channelData = 1e3 * (V / (M - sa))),
channelData < 1.01 * audioSampleRate && channelData > 0.99 * audioSampleRate && (actualAudioSampleRate += (channelData - actualAudioSampleRate) / W),
(sa = M),
(V = 0),
(M = processStartTime));
}
document.getElementById("soundappletdiv").innerHTML =
'<div onclick="var e=document.getElementById(\'soundappletdebug\'); e.style.display=(e.style.display==\'none\')?\'block\':\'none\';" style="max-width:400px; min-height:50px; border-style:solid; border-color:black; background-color:white; color:black; border-width:1px; margin:2px; padding:2px; font-family:sans-serif; font-size:x-small;">WebSDR HTML5 sound - Copyright 2007-2020, P.T. de Boer, pa3fwm@websdr.org<br><span id="soundappletdebug" style="display:none"></span></div><span id="debug2"></span>';
var y = new Int16Array(F),
g = 0,
p = 6144,
q = 0,
remoteSampleRate = 8e3,
v = 8e3,
R = -1,
actualRemoteSampleRate = 8e3,
audioSampleRate = 48e3,
actualAudioSampleRate = 48e3,
x = 1,
volume = 1,
ja = -1,
S,
A = 0,
B = [],
ka,
X,
Y = 0,
soundApplet = this,
webSocket = h,
ya = [
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720,
560,
528,
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880,
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],
playbackBuffer = [
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sa = 0,
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ha = 0,
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scriptProcessor,
currentConvolver,
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currentAudioContext.sampleRate = audioSampleRate;
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} catch (Aa) {
scriptProcessor = currentAudioContext.createJavaScriptNode(na, 1, 1);
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scriptProcessor.onaudioprocess = processEvent;
this.currentScriptProcessor = scriptProcessor;
currentConvolver = currentAudioContext.createConvolver();
scriptProcessor.connect(currentConvolver);
currentConvolver.connect(currentAudioContext.destination);
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(playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate)),
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channelDataChunk.set(J),
(K[0] = playbackBuffer),
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channelDataChunk.set(la),
(K[2] = playbackBuffer),
(playbackBuffer = currentAudioContext.createBuffer(1, 32, audioSampleRate)),
(channelDataChunk = playbackBuffer.getChannelData(0)),
channelDataChunk.set(ea),
(K[3] = playbackBuffer);
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J = Math.round(audioSampleRate / 48e3);
1 > J && (J = 1);
la = 512 * J;
da = [T, playbackBuffer, da, Z];
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playbackBuffer = currentAudioContext.createBuffer(1, la, audioSampleRate);
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channelDataChunk.set(D);
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currentConvolver.normalize = !1;
currentConvolver.buffer = K[0];
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ua,
z,
oa,
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va = 0,
ba = 0,
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b > F / 2 && (b -= F);
b /= v;
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if (d < 0.25 * -N || d > 0.5 * N) O = 1;
0.01 < Math.abs(d) && 20 > W && (O = 1);
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0.995 > x && (x = 0.995);
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Math.round(1e3 * N) +
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Math.round(1e3 * H) +
" " +
Math.round(1e6 * (x - 1)) +
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O +
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soundAppletDebugHtml += currentAudioContext ? " WebAudio " : " none ";
soundAppletDebugHtml += actualAudioSampleRate.toFixed(2) + " " + actualRemoteSampleRate.toFixed(2);
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lastlen = b.length;
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l = 0;
if (240 == (b[a] & 240))
(smeter = 256 * (b[a] & 15) + b[a + 1]),
soundApplet.smetercallback && soundApplet.smetercallback(10 * smeter),
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var e;
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g += 128;
g >= F && (g -= F);
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j;
for (j = 0; 20 > j; j++) D[j] = E[j] = 0;
aa = 0;
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(l = 4), (f = 2), (z = 14 - (b[a] >> 4));
else if (128 != (b[a] & 128)) (l = 1), (f = 2);
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(j = 256 * b[a + 1] + b[a + 2]),
j != remoteSampleRate && ((remoteSampleRate = j), (R = g)),
webSocket && webSocket.postMessage({ type: "samplerate", samplerate: remoteSampleRate }, "*"),
0 < remoteSampleRate ? (ja = 1) : ((ja = 0), stopall()),
(a += 2);
else if (130 == b[a]) (ua = 256 * b[a + 1] + b[a + 2]), (a += 2);
else if (131 == b[a])
(oa = b[a + 1]),
(j = b[a + 1] & 15),
j != fa && ((fa = j), currentConvolver && (currentConvolver.buffer = K[fa])),
a++;
else if (132 == b[a]) {
Y += 128;
for (e = 0; 128 > e; e++) y[g + e] = 0;
g += 128;
g >= F && (g -= F);
for (j = 0; 20 > j; j++) D[j] = E[j] = 0;
aa = 0;
} else
133 == b[a] &&
((d =
16777216 *
(((b[a + 1] & 15) << 16) + (b[a + 2] << 8) + b[a + 3]) +
(b[a + 4] << 16) +
(b[a + 5] << 8) +
b[a + 6]),
(e = b[a + 1] >> 4),
soundApplet.truefreqcallback && soundApplet.truefreqcallback(d, e),
(a += 6));
if (2 == f) {
f = Y = 0;
for (j = 16 == (oa & 16) ? 12 : 14; 128 > f; ) {
d =
(b[a + 3] & 255) |
((b[a + 2] & 255) << 8) |
((b[a + 1] & 255) << 16) |
((b[a + 0] & 255) << 24);
d <<= l;
e = 0;
var n;
n = 15 - z;
var s = ua,
u = [999, 999, 8, 4, 2, 1, 99, 99];
if (0 != d) for (; 0 == (d & 2147483648) && e < n; ) (d <<= 1), e++;
e < n
? ((n = e), e++, (d <<= 1))
: ((n = (d >> 24) & 255), (e += 8), (d <<= 8));
var q = 0;
n >= u[z] && q++;
n >= u[z - 1] && q++;
q > z - 1 && (q = z - 1);
u = (((d >> 16) & 65535) >> (17 - z)) & (-1 << q);
u += n << (z - 1);
0 != (d & (1 << (32 - z + q))) && ((u |= (1 << q) - 1), (u = ~u));
for (l += e + z - q; 8 <= l; ) a++, (l -= 8);
for (e = d = 0; 20 > e; e++) d += D[e] * E[e];
d |= 0;
d = 0 <= d ? d >> 12 : (d + 4095) >> 12;
s = u * s + s / 2;
u = s >> 4;
for (e = 19; 0 <= e; e--) {
D[e] += -(D[e] >> 7) + ((E[e] * u) >> j);
if (0 == e) break;
E[e] = E[e - 1];
}
E[0] = d + s;
d = E[0] + (aa >> 4);
aa = 16 == (oa & 16) ? 0 : aa + ((E[0] << 4) >> 3);
y[g++] = d;
g >= F && (g -= F);
f++;
}
0 == l && a--;
}
}
e = g - c;
0 > e && (e += F);
ba += e;
L += (1e3 * e) / remoteSampleRate;
wsMessageReceiveTime < L && (L = wsMessageReceiveTime);
ba >= remoteSampleRate &&
((j = 1e3 * (ba / (L - va))),
j < 1.01 * remoteSampleRate && j > 0.99 * remoteSampleRate && (actualRemoteSampleRate += (j - actualRemoteSampleRate) / W),
(ba = 0),
100 > W && W++,
(va = L),
(L = wsMessageReceiveTime));
webSocket &&
((b = c),
c > g && (webSocket.postMessage(y.subarray(c), "*"), (b = 0)),
g > b && webSocket.postMessage(y.subarray(b, g), "*"));
if (S && !(Y > 2 * remoteSampleRate))
for (; c != g; ) {
for (X += ka / remoteSampleRate; 1 <= X; )
S.setInt16(A, y[c], !0),
(A += 2),
65536 <= A &&
((b = new ArrayBuffer(65536)),
(A = 0),
(S = new DataView(b)),
B.push(b)),
X--;
c++;
c >= F && (c -= F);
}
if (ma) {
if ((c = document.getElementById("audiostartbutton")))
c.style.display = "suspended" === currentAudioContext.state ? "block" : "none";
"running" === currentAudioContext.state && (ma = 0);
}
};
webSocket.onopen = function () {
soundappletstarted();
};
webSocket.onclose = function () {
for (var c = 0; c < F; c++) y[c] = 0;
webSocket.onclose = h;
webSocket = webSocket.onmessage = h;
};
this.setparam = function (c) {
try {
webSocket.send("GET /~~param?" + c);
} catch (a) {}
};
this.smeter = function () {
return 10 * smeter;
};
this.getid = function () {
return ja;
};
this.mute = function (newValue) {
muted = newValue;
!S && !webSocket && this.setparam("mute=" + newValue);
};
this.setvolume = function (newVolume) {
volume = newVolume;
};
this.setdelay1 = function (c) {
ta = c;
H = N = c / 8e3;
p = (F + g - ta) % F;
};
stopall = function () {
currentAudioContext
? (webSocket.close(),
(scriptProcessor.onaudioprocess = h),
scriptProcessor.disconnect(),
(channelDataChunk = K = this.p = currentAudioContext = $ = currentConvolver = scriptProcessor = scriptProcessor.destination = h))
: webSocket.close();
};
this.restartaudio = function () {
stopall();
document.audioContext = new AudioContext();
window.prep_html5sound();
};
this.destroy = function () {
stopall();
window.soundapplet = h;
};
this.rec_start = function () {
A = 0;
ka = remoteSampleRate;
X = 0;
var c = new ArrayBuffer(65536);
S = new DataView(c);
B = [c];
muted && this.setparam("mute=0");
};
this.rec_finish = function () {
B[B.length - 1] = B[B.length - 1].slice(0, A);
S = h;
var c = {};
c.wavdata = B;
c.len = 65536 * (B.length - 1) + A;
c.sr = ka;
!webSocket && muted && this.setparam("mute=1");
return c;
};
this.rec_length_kB = function () {
return (65536 * (B.length - 1) + A) / 1024;
};
this.setbcaudio = function (c) {
webSocket = c;
muted &&
(c && this.setparam("mute=0"),
!c && !recaudio && this.setparam("mute=1"));
c && webSocket.postMessage({ type: "samplerate", samplerate: remoteSampleRate }, "*");
};
this.setstereo = function (c) {
0 > c
? (currentConvolver.disconnect(), currentConvolver.connect(currentAudioContext.destination))
: ($ || (($ = currentAudioContext.createChannelMerger()), $.connect(currentAudioContext.destination)),
currentConvolver.disconnect(),
currentConvolver.connect($, 0, c));
};
this.audioresume = function () {
currentAudioContext.resume();
var audioStartButton = document.getElementById("audiostartbutton");
audioStartButton && (audioStartButton.style.display = "none");
ma = 0;
};
}
window.prep_html5sound = function () {
window.soundapplet = new za();
};
prep_html5sound();
})();
Raw
04 - websdrsound.java
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import netscape.javascript.JSObject;
public class websdrsound extends Applet implements LineListener, Runnable, MouseListener {
private SourceDataLine I;
private Socket I1;
private InputStream II;
OutputStream Il;
static final long serialVersionUID = 1L;
int I11 = -2;
int II1 = -2;
int Il1 = -1;
int I1I = 0;
int III = 0;
final float IlI = 200.0F;
int I1l = 0;
String IIl = "";
int Ill = -1;
Thread I111;
boolean II11 = true;
boolean Il11 = false;
public int smeter = -32767;
public int l = 0;
public int I1I1 = this.l;
double III1 = 1.0D;
float IlI1 = 1.0F;
double I1l1 = 0.0D;
double IIl1 = 0.0D;
final int Ill1 = 23;
final int I11I = 128;
final int II1I = 48;
float Il1I = 1.0F;
final float[] lll1l1l = new float[3];
float lll1ll1;
long I1II = 0L;
long llll11l = 0L;
float llll111 = 0.0F;
final float[] lll1lll = new float[4];
final short[] lll11ll = new short[] {
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, -7552, -7296,
-8064, -7808, -6528, -6272, -7040, -6784, -2752, -2624, -3008, -2880,
-2240, -2112, -2496, -2368, -3776, -3648, -4032, -3904, -3264, -3136,
-3520, -3392, -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136, -11008, -10496,
-12032, -11520, -8960, -8448, -9984, -9472, -15104, -14592, -16128, -15616,
-13056, -12544, -14080, -13568, -344, -328, -376, -360, -280, -264,
-312, -296, -472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40, -216, -200,
-248, -232, -152, -136, -184, -168, -1376, -1312, -1504, -1440,
-1120, -1056, -1248, -1184, -1888, -1824, -2016, -1952, -1632, -1568,
-1760, -1696, -688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848, 5504, 5248,
6016, 5760, 4480, 4224, 4992, 4736, 7552, 7296, 8064, 7808,
6528, 6272, 7040, 6784, 2752, 2624, 3008, 2880, 2240, 2112,
2496, 2368, 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, 30208, 29184,
32256, 31232, 26112, 25088, 28160, 27136, 11008, 10496, 12032, 11520,
8960, 8448, 9984, 9472, 15104, 14592, 16128, 15616, 13056, 12544,
14080, 13568, 344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424, 88, 72,
120, 104, 24, 8, 56, 40, 216, 200, 248, 232,
152, 136, 184, 168, 1376, 1312, 1504, 1440, 1120, 1056,
1248, 1184, 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592, 944, 912,
1008, 976, 816, 784, 880, 848 };
boolean IIII = false;
int IlII = 5;
float I1lI = 0.0F;
int IIlI = 0;
float IllI = 0.0F;
float[] lll1111 = new float[272];
float[] lll111l = new float[1552];
byte[] lll11l1 = new byte[3120];
int I11l = 1;
float[] lll1l11 = new float[20];
int II1l = 1;
int Il1l = 0;
static Class I1Il;
public static void main(String[] paramArrayOfString) {
System.out.println("Copyright 2007-2016, Pieter-Tjerk de Boer, PA3FWM, pa3fwm@websdr.org - All rights reserved.");
System.out.println("Since the intended use of this (or any) applet involves sending a copy to the client computer, I (PA3FWM) hereby allow making it available unmodified, as part of the original .jar file, via my original WebSDR server software, to original WebSDR clients.");
System.out.println("Other use, including distribution in part or entirety in other forms or as part of other software, or reverse engineering is not allowed without my explicit prior permission.");
}
public void stop() {
this.I111 = null;
this.IIl = "stop()";
I();
}
public void destroy() {
stop();
}
public void paint(Graphics paramGraphics) {
paramGraphics.drawString("WebSDR sound applet", 10, 10);
paramGraphics.drawString("Copyright 2007-2016, P.T. de Boer, pa3fwm@websdr.org", 10, 24);
paramGraphics.drawString("Java version: " + System.getProperty("java.version"), 10, 88);
if (this.II11)
return;
paramGraphics.drawString(this.I11 + " " + this.IIl + " " + this.Ill + this.l, 10, 40);
paramGraphics.drawString(this.III + " " + this.I1I, 10, 52);
paramGraphics.drawString(this.I1l + " " + 200.0F, 10, 64);
paramGraphics.drawString((int)(0.5D + (this.IlI1 * 8000.0F)) + " " + (int)(0.5D + (this.III1 - 1.0D) * 1000000.0D) + " " + (int)(0.5D + (1.0D - this.IIl1 / 6.0D / this.I1l1 * this.IlI1) * 1000000.0D), 10, 76);
}
void I() {
if (this.II11)
return;
repaint();
}
public void mouseEntered(MouseEvent paramMouseEvent) {}
public void mouseExited(MouseEvent paramMouseEvent) {}
public void mouseReleased(MouseEvent paramMouseEvent) {}
public void mousePressed(MouseEvent paramMouseEvent) {}
public void I(MouseEvent paramMouseEvent) {}
public void mouseClicked(MouseEvent paramMouseEvent) {
this.II11 = !this.II11;
repaint();
}
public int getid() {
return this.Ill;
}
public int I1() {
return this.smeter;
}
public String javaversion() {
return System.getProperty("java.version");
}
public void setparam(String paramString) {
paramString = "GET /~~param?ppm=" + (int)(0.5D + (this.III1 - 1.0D) * 1000000.0D) + "&ppml=" + (int)(0.5D + (1.0D - this.IIl1 / 6.0D / this.I1l1 * this.IlI1) * 1000000.0D) + "&" + paramString + "\r\n\r\n";
try {
this.Il.write(paramString.getBytes(), 0, paramString.length());
} catch (Exception exception) {}
this.IIl1 = this.I1l1 = 0.0D;
}
public void setvolume(float paramFloat) {
this.Il1I = paramFloat;
}
public void start() {
AudioFormat audioFormat = new AudioFormat(48000.0F, 16, 1, true, false);
DataLine.Info info = new DataLine.Info((I1Il == null) ? (I1Il = I("javax.sound.sampled.SourceDataLine")) : I1Il, audioFormat, 96000);
try {
this.I = (SourceDataLine)AudioSystem.getLine(info);
this.I.open(audioFormat, 96000);
} catch (LineUnavailableException lineUnavailableException) {}
this.I.addLineListener(this);
this.I.start();
try {
int i = getCodeBase().getPort();
if (i < 0)
i = 80;
this.I1 = new Socket(getCodeBase().getHost(), i);
this.II = this.I1.getInputStream();
this.Il = this.I1.getOutputStream();
this.Il.write("GET /~~stream?java=1&23\r\n\r\n".getBytes(), 0, 27);
this.I11 = 1;
I();
} catch (Exception exception) {
this.I11 = -3;
I();
}
this.I11 = 4;
this.IIl = "start()";
this.I111 = new Thread(this);
this.I111.start();
JSObject.getWindow(this).eval("soundappletstarted()");
addMouseListener(this);
I();
this.I1II = System.currentTimeMillis();
}
void I(int paramInt) {
if (this.Ill == -1) {
this.Ill = paramInt;
} else if ((paramInt & 0x8000) == 0) {
this.smeter = paramInt;
} else {
paramInt &= 0x7FFF;
if ((paramInt & 0x4000) == 0)
this.IlI1 = paramInt / 8000.0F;
}
}
void I1(int paramInt) {
this.I1l1 += paramInt;
this.Il1 = this.I.getBufferSize() - this.I.available();
if (!this.I.isActive()) {
this.I1I++;
this.Il1 = -1;
}
this.I11++;
this.lll1l1l[0] = this.lll1l1l[1];
this.lll1l1l[1] = this.lll1l1l[2];
this.lll1l1l[2] = this.I.getFramePosition() / 48.0F - (float)(System.currentTimeMillis() - this.I1II);
if (this.lll1l1l[1] > this.lll1l1l[0] && this.lll1l1l[1] > this.lll1l1l[2])
this.lll1ll1 = 0.1F * this.lll1l1l[1] + 0.9F * this.lll1ll1;
for (byte b2 = 0; b2 < paramInt; b2++) {
for (byte b = 0; b < 6; b++) {
byte b3;
float[] arrayOfFloat2 = {
-0.0030657F, -0.0027421F, -0.0028342F, -0.0018084F, 5.5067E-4F, 0.0040855F, 0.0081821F, 0.011793F, 0.01366F, 0.01262F,
0.0080115F, 1.7366E-5F, -0.010139F, -0.020236F, -0.027388F, -0.028593F, -0.02145F, -0.0048089F, 0.020752F, 0.052804F,
0.087352F, 0.11948F, 0.14428F, 0.15778F, 0.15778F, 0.14428F, 0.11948F, 0.087352F, 0.052804F, 0.020752F,
-0.0048089F, -0.02145F, -0.028593F, -0.027388F, -0.020236F, -0.010139F, 1.7366E-5F, 0.0080115F, 0.01262F, 0.01366F,
0.011793F, 0.0081821F, 0.0040855F, 5.5067E-4F, -0.0018084F, -0.0028342F, -0.0027421F, -0.0030657F };
float[] arrayOfFloat1 = {
-0.0024615F, -0.0072497F, -0.0080908F, -0.0078587F, -0.0024454F, 0.0045784F, 0.010045F, 0.009404F, 0.0018009F, -0.0092801F,
-0.016675F, -0.013973F, -1.8887E-4F, 0.017873F, 0.028294F, 0.020954F, -0.0048033F, -0.036754F, -0.053709F, -0.035879F,
0.023444F, 0.11149F, 0.19934F, 0.25408F, 0.25408F, 0.19934F, 0.11149F, 0.023444F, -0.035879F, -0.053709F,
-0.036754F, -0.0048033F, 0.020954F, 0.028294F, 0.017873F, -1.8887E-4F, -0.013973F, -0.016675F, -0.0092801F, 0.0018009F,
0.009404F, 0.010045F, 0.0045784F, -0.0024454F, -0.0078587F, -0.0080908F, -0.0072497F, -0.0024615F };
this.lll111l[16 + 6 * b2 + b] = 0.0F;
if (this.Il11) {
for (b3 = 0; b3 < 8; b3++)
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] + this.lll1111[b2 + 7 + b3] * arrayOfFloat1[6 * b3 + 5 - b];
} else {
for (byte b4 = 0; b4 < 8; b4++)
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] + this.lll1111[b2 + 7 + b4] * b3[6 * b4 + 5 - b];
}
this.lll111l[16 + 6 * b2 + b] = this.lll111l[16 + 6 * b2 + b] * 6.0F;
}
}
int i = paramInt * 6;
byte b1;
for (b1 = 0; this.I1lI < i; b1++) {
int j = (int)this.I1lI + 16;
float f1 = this.I1lI - (j - 16);
f1 = (1.0F - f1) * this.lll111l[j - 1] + f1 * this.lll111l[j];
if (2 * b1 > 3100)
break;
this.lll11l1[2 * b1] = (byte)((int)f1 & 0xFF);
this.lll11l1[2 * b1 + 1] = (byte)((int)f1 >> 8);
this.I1lI = (float)(this.I1lI + this.III1 * this.IlI1);
}
this.I1lI -= i;
if (this.IIlI == 0) {
this.I.write(this.lll11l1, 0, b1 * 2);
this.IIl1 += b1;
} else if (b1 < this.IIlI) {
this.IIlI -= b1;
} else {
this.I.write(this.lll11l1, this.IIlI * 2, (b1 - this.IIlI) * 2);
this.IIlI = 0;
this.IIl1 += (b1 - this.IIlI);
}
if (this.llll11l == 0L)
this.llll111 = (float)this.llll11l;
this.llll11l += b1;
this.lll1lll[0] = this.lll1lll[1];
this.lll1lll[1] = this.lll1lll[2];
this.lll1lll[2] = this.lll1lll[3];
this.lll1lll[3] = (float)this.llll11l / 48.0F - (float)(System.currentTimeMillis() - this.I1II);
if (this.IIlI == 0 && this.lll1lll[3] < this.lll1ll1 && this.llll111 > this.lll1ll1 + 150.0F) {
this.IIlI = (int)(this.lll1ll1 - this.lll1lll[3]);
this.III++;
this.llll111 -= this.IIlI;
this.lll1lll[0] = this.lll1lll[0] - this.IIlI;
this.lll1lll[1] = this.lll1lll[1] - this.IIlI;
this.lll1lll[2] = this.lll1lll[2] - this.IIlI;
this.lll1lll[3] = this.lll1lll[3] - this.IIlI;
this.lll1ll1 -= this.IIlI;
this.IIlI *= 48;
this.llll11l -= this.IIlI;
}
if (this.lll1lll[1] > this.lll1lll[0] && this.lll1lll[1] > this.lll1lll[2] && this.lll1lll[1] > this.lll1lll[3])
this.llll111 = this.lll1lll[1];
for (paramInt = 0; paramInt < 16; paramInt++) {
this.lll111l[paramInt] = this.lll111l[i + paramInt];
this.lll1111[paramInt] = this.lll1111[i / 6 + paramInt];
}
float f = this.llll111 - this.lll1ll1;
this.I1l = (int)f;
f -= 200.0F;
f /= 3.0F;
this.IllI = 0.999F * this.IllI + 0.001F * f;
if (this.IllI < -40.0F)
this.IllI = -40.0F;
if (this.IllI > 40.0F)
this.IllI = 40.0F;
this.III1 = (1.0F + this.IllI * 5.0E-5F);
if (f > 200.0F) {
this.IIlI = (int)f;
this.III++;
this.llll111 -= this.IIlI;
this.lll1lll[0] = this.lll1lll[0] - this.IIlI;
this.lll1lll[1] = this.lll1lll[1] - this.IIlI;
this.lll1lll[2] = this.lll1lll[2] - this.IIlI;
this.lll1lll[3] = this.lll1lll[3] - this.IIlI;
this.IIlI *= 48;
this.llll11l -= this.IIlI;
}
}
void I(float paramFloat, int paramInt) {
for (byte b = 19; b > 0; b--)
this.lll1l11[b] = this.lll1l11[b - 1];
this.lll1l11[0] = paramFloat;
float f = this.lll1l11[10];
if (this.II1l >= 0) {
f = 0.0F;
float[][] arrayOfFloat = { { 0.0416798F, -0.0010372F, -0.0316519F, 0.0592284F, -0.0496101F, -0.0066906F, 0.0774353F, -0.0963F, -0.0179755F, 0.5594503F }, { 0.030725F, 0.062421F, -0.028814F, -0.027426F, -0.056624F, -0.034655F, 0.021408F, 0.110595F, 0.199341F, 0.255473F } };
for (byte b1 = 0; b1 < 10; b1++)
f += arrayOfFloat[this.II1l][b1] * (this.lll1l11[b1] + this.lll1l11[19 - b1]);
}
this.lll1111[paramInt + 16] = f * this.Il1I;
if (paramInt == 127)
I1(128);
}
public void run() {
byte[] arrayOfByte = new byte[264];
int[] arrayOfInt3 = new int[20];
int[] arrayOfInt2 = new int[20];
int[] arrayOfInt1 = new int[20];
int m = 0;
byte b1 = 0;
byte b = -1;
char c = Character.MIN_VALUE;
int k = 0;
int j = 256;
int i = 0;
this.Ill = -1;
try {
while (Thread.currentThread() == this.I111) {
this.I11++;
I();
this.I1I1 = this.l;
int i1 = 0;
int n = 0;
while (c < ') {
i1 = this.II.read(arrayOfByte, m, 260 - m);
if (i1 < 0)
break;
m += i1;
boolean bool = true;
while (bool && m > 0) {
int i2 = 0;
if (b == -1) {
if (m < 2) {
bool = false;
} else {
b = 0;
int i3 = (arrayOfByte[0] & 0xFF) + ((arrayOfByte[1] & 0xFF) << 8);
I(i3);
i2 = 2;
}
} else if (b == 0) {
if ((arrayOfByte[0] & 0x80) != 128) {
n = 1;
b = 2;
c = Character.MIN_VALUE;
} else if (arrayOfByte[0] >= -112 && arrayOfByte[0] <= -33) {
n = 4;
b = 2;
c = Character.MIN_VALUE;
i = 6 - (0xF & arrayOfByte[0] - 128 >> 4);
} else if (arrayOfByte[0] == Byte.MIN_VALUE) {
b = 1;
i2 = 1;
} else if ((arrayOfByte[0] & 0xF0) == 240) {
if (m < 2) {
bool = false;
} else {
this.smeter = 10 * (((arrayOfByte[0] & 0xF) << 8) + (arrayOfByte[1] & 0xFF));
i2 = 2;
}
} else if (arrayOfByte[0] == -127) {
if (m < 3) {
bool = false;
} else {
int i3 = (arrayOfByte[1] << 8) + (arrayOfByte[2] & 0xFF);
this.IlI1 = i3 / 8000.0F;
i2 = 3;
}
} else if (arrayOfByte[0] == -126) {
if (m < 3) {
bool = false;
} else {
int i3 = (arrayOfByte[1] << 8) + (arrayOfByte[2] & 0xFF);
j = i3;
i2 = 3;
}
} else if (arrayOfByte[0] == -125) {
if (m < 2) {
bool = false;
} else {
this.Il1l = arrayOfByte[1];
this.II1l = (arrayOfByte[1] & 0xF) - 1;
if (this.II1l == 2) {
this.II1l = 0;
this.Il11 = true;
} else {
this.Il11 = false;
}
i2 = 2;
}
} else if (arrayOfByte[0] == -124) {
i2 = 1;
c = ';
for (byte b2 = 0; b2 < '; b2++)
this.lll1111[b2 + 16] = 0.0F;
I1(128);
for (i1 = 0; i1 < 20; i1++) {
arrayOfInt2[i1] = 0;
arrayOfInt3[i1] = 0;
}
k = 0;
} else if (arrayOfByte[0] == -123) {
if (m < 7) {
bool = false;
} else {
i2 = 7;
}
} else {
i2 = 1;
this.IIII = true;
bool = false;
}
} else if (b == 1) {
if (m < 128 || c == ') {
bool = false;
} else {
for (byte b2 = 0; b2 < 20; b2++) {
arrayOfInt2[b2] = 0;
arrayOfInt3[b2] = 0;
}
k = 0;
i1 = 0;
while (i1 < m && c < ') {
this.lll1111[c + 16] = this.lll11ll[(short)arrayOfByte[i1] & 0xFF];
I(this.lll11ll[(short)arrayOfByte[i1] & 0xFF], c);
i1++;
c++;
}
i2 = 128;
b = 0;
bool = false;
}
}
if (b == 2) {
i1 = 0;
byte b2 = ((this.Il1l & 0x10) == 16) ? 12 : 14;
while (i1 < m && c < ') {
int i4 = (arrayOfByte[i1 + 3] & 0xFF) + ((arrayOfByte[i1 + 2] & 0xFF) << 8) + ((arrayOfByte[i1 + 1] & 0xFF) << 16) + ((arrayOfByte[i1 + 0] & 0xFF) << 24);
int i5 = i4 << n;
int i10 = n;
int i9 = i5;
byte b3 = 0;
int i6 = 15 - i;
int i8 = j;
int[] arrayOfInt = { 999, 999, 8, 4, 2, 1, 99, 99 };
if (i5 != 0)
while ((i5 & Integer.MIN_VALUE) == 0 && b3 < i6) {
i5 <<= 1;
b3++;
}
if (b3 < i6) {
i7 = b3;
b3++;
i6 = i5 << 1;
} else {
i7 = i5 >> 24 & 0xFF;
b3 += 8;
i6 = i5 << 8;
}
i5 = 0;
if (i7 >= arrayOfInt[i])
i5++;
if (i7 >= arrayOfInt[i - 1])
i5++;
if (i5 > i - 1)
i5 = i - 1;
int i3 = (i6 >> 16 & 0xFFFF) >> 17 - i & -1 << i5;
i3 += i7 << i - 1;
if ((i6 & 1 << 32 - i + i5) != 0) {
i3 |= (1 << i5) - 1;
i3 ^= 0xFFFFFFFF;
}
for (n += b3 + i - i5; n >= 8; n -= 8)
i1++;
if (i9 == 0 || i1 + (7 + n) / 8 > m) {
bool = false;
n = i10;
break;
}
i2 = i1;
i6 = 0;
for (i5 = 0; i5 < 20; i5++)
i6 += arrayOfInt3[i5] * arrayOfInt2[i5];
i5 = i6 / 4096;
int i7 = i3 * i8 + i8 / 2;
i6 = i7 >> 4;
for (i3 = 0; i3 < 20; i3++)
arrayOfInt3[i3] = arrayOfInt3[i3] + -(arrayOfInt3[i3] >> 7) + (arrayOfInt2[i3] * i6 >> b2);
for (i3 = 19; i3 > 0; i3--) {
arrayOfInt2[i3] = arrayOfInt2[i3 - 1];
arrayOfInt1[i3] = arrayOfInt1[i3 - 1];
}
arrayOfInt2[0] = i5 + i7;
i3 = i5 + i7 * this.I1I1 + (k >> 4);
if ((this.Il1l & 0x10) == 16) {
k = 0;
} else {
k += arrayOfInt2[0] << 4 >> 3;
}
I(i3, c);
c++;
}
if (c == ') {
b = 0;
if (n > 0) {
i2++;
n = 0;
}
}
b1++;
}
if (i2 > 0)
for (i1 = i2; i1 < m; i1++)
arrayOfByte[i1 - i2] = arrayOfByte[i1];
m -= i2;
}
if (this.IIII || m < 0)
break;
}
if (c == ')
c = Character.MIN_VALUE;
this.II1 = i1;
this.I11++;
if (this.IIII || i1 == -1)
break;
}
} catch (IOException iOException) {
this.IIl = "!" + iOException.getMessage();
}
this.IIl = "^" + this.IIl;
this.I.flush();
this.I.stop();
this.I.close();
try {
this.I1.close();
} catch (Exception exception) {}
this.I11 = -5;
I();
}
public void update(LineEvent paramLineEvent) {}
static Class I(String paramString) {
try {
return Class.forName(paramString);
} catch (ClassNotFoundException classNotFoundException) {
throw (new NoClassDefFoundError()).initCause(classNotFoundException);
}
}
}
@kevinelliott
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Interesting. I would be willing to bet there is some encoding happening to prevent this very thing that we need to figure out.

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