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websdr-sound.js
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websdr-sound.js
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//WebSDR HTML5 client side - Copyright 2013-2014, 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 m = null
, aa = window.AudioContext || window.webkitAudioContext;
if (aa)
{
document.ct || (document.ct = new aa);
var ba;
try
{
ba = document.ct.createConvolver
}
catch (ja)
{}
ba || (document.ct = m, sup_webaudio = !1)
}
var r = 32768;
function ta()
{
function ca(a)
{
var b = a.outputBuffer.getChannelData(0)
, c = a.outputBuffer.length;
ka++;
for (a = 0; a < c; a++)
{
var e = t[q]
, g = B * C / h;
k += g;
if (1 <= k)
{
k -= 1;
t[q] = 0;
q++;
q >= r && (q -= r);
var d = t[q];
da && (e = (k * d + (g - k) * e) / g)
}
K && (e = 0);
b[a] = 2E-5 * e * S
}
T = (new Date).getTime();
a = (new Date).getTime();
U && (c = a - U, c > ea && (ea = c));
U = a;
F && 0 == b[0] && H++
}
function la(a)
{
a = a.inputBuffer.getChannelData(0);
K || (N ? N-- : 0 != a[0] ? H = 5 : (H--, H || (H = 5, N = 25, F++, f.disconnect(), f.onaudioprocess = m, f = g.createScriptProcessor(I, 1, 1), f.onaudioprocess =
ca, this.p = f, f.connect(w), f.connect(D))))
}
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; border-width:1px; margin:2px; padding:2px; font-family:sans-serif; font-size:x-small;\">WebSDR HTML5 sound - Copyright 2007-2014, P.T. de Boer, pa3fwm@websdr.org<br><span id=\"soundappletdebug\" style=\"display:none\"></span></div>";
var t = new Int16Array(r)
, l = 0
, q = 6144
, k = 0
, C = 8E3
, h = 48E3
, B = 1
, S = 1
, V = -1
, L, x = 0
, y = []
, ma = [-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
]
, na = [0.0084619, 3.6183E-4, 2.0264E-4, -4.8621E-5, -3.6771E-4, -7.0991E-4, -0.0010355
, -0.0012935, -0.0014506, -0.0014733, -0.0013571, -0.0011019, -7.4253E-4, -3.0836E-4, 1.358E-4, 5.6517E-4, 8.8996E-4, 0.0010664, 0.0010912, 9.2941E-4, 6.0906E-4, 1.5494E-4, -3.7203E-4, -9.1186E-4, -0.001389, -0.0017416, -0.0019133, -0.0018764, -0.0016225, -0.0011768, -5.8255E-4, 9.2361E-5, 7.5528E-4, 0.0013306, 0.0017366, 0.0019135, 0.0018299, 0.0014834, 9.0902E-4, 1.6944E-4, -6.4513E-4, -0.0014333, -0.0020901, -0.002526, -0.0026728, -0.0024998, -0.0020096, -0.0012556, -3.2129E-4, 6.8312E-4, 0.0016291, 0.0023941, 0.0028705, 0.0029846, 0.002705
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, 0.007962, 0.011341, 0.013538, 0.014156, 0.012956, 0.0099028, 0.0051811, -7.971E-4, -0.0074221, -0.013934, -0.019491, -0.023251, -0.024456, -0.02252, -0.017099, -0.0081382, 0.0040987, 0.019038, 0.035829, 0.053411, 0.070595, 0.086169, 0.098999, 0.10813, 0.11288, 0.11288, 0.10813, 0.098999, 0.086169, 0.070595, 0.053411, 0.035829, 0.019038, 0.0040987, -0.0081382, -0.017099, -0.02252, -0.024456, -0.023251, -0.019491, -0.013934, -0.0074221, -7.971E-4, 0.0051811, 0.0099028, 0.012956, 0.014156, 0.013538, 0.011341, 0.007962, 0.0038988, -3.1209E-4, -0.0041599
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]
, oa = [-6.0729E-4
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, 0.002576, 0.0026933, 0.0021119, 9.4722E-4, -5.2351E-4, -0.0019315, -0.0029037, -0.0031646, -0.002609, -0.0013427, 3.3954E-4, 0.0020171, 0.0032517, 0.0036965, 0.003196, 0.0018324, -8.0558E-5, -0.0020711, -0.0036212, -0.004303, -0.0038921, -0.0024398, -2.7089E-4, 0.0020837, 0.0040178, 0.0050015, 0.0047273, 0.003197, 7.4395E-4, -0.0020419, -0.0044463, -0.0058212, -0.0057441, -0.0041549, -0.0013781, 0.0019266, 0.004923, 0.0068105, 0.0070197, 0.0053925, 0.0022394, -0.00171, -0.0054734, -0.0080484, -0.0086754, -0.0070524, -0.0034446, 0.001345, 0.0061452
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]
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, 9.4413E-4, 4.9677E-4, 6.2545E-5, -3.507E-4, -7.3703E-4, -0.0010903, -0.0014065, -0.0016809, -0.0019112, -0.0020944, -0.0022306, -0.0023179, -0.0023594, -0.0023534, -0.0023046, -0.0022163, -0.0020897, -0.00193, -0.001742, -0.0015302, -0.0012998, -0.0010553, -8.0225E-4, -5.4502E-4, -2.8944E-4, -3.878E-5, 2.0073E-4, 4.284E-4, 6.3679E-4, 8.2476E-4, 9.944E-4, 0.0011363, 0.001253, 0.0013429, 0.0014071, 0.0014449, 0.0014572, 0.0014451, 0.0014097, 0.0013539, 0.0012785, 0.0011887, 0.0010826, 9.6872E-4, 8.5449E-4, 7.1566E-4, 5.89E-4, 4.6081E-4, 3.3872E-4
, 2.1895E-4, 1.0817E-4, 4.4005E-6, -8.6773E-5, -1.673E-4, -2.3281E-4, -2.8568E-4, -3.2265E-4, -3.4657E-4, -3.55E-4, -0.0057279
]
, qa = [1.4796E-5, 5.4604E-4, 1.0129E-4, -1.1334E-6, -1.3189E-4, -1.9395E-4, -1.3571E-4, 2.1337E-5, 1.8632E-4, 2.5029E-4, 1.5699E-4, -5.2509E-5, -2.543E-4, -3.138E-4, -1.739E-4, 9.7403E-5, 3.3704E-4, 3.8346E-4, 1.8391E-4, -1.5855E-4, -4.3525E-4, -4.5776E-4, -1.8388E-4, 2.3889E-4, 5.5005E-4, 5.3497E-4, 1.7021E-4, -3.4174E-4, -6.8209E-4, -6.1268E-4, -1.3912E-4, 4.6928E-4, 8.3027E-4, 6.8693E-4, 8.6099E-5, -6.2455E-4, -9.9487E-4
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, 0.0014094, 0.0052683, 0.0060364, 0.0029929, -0.0021982, -0.0063734, -0.0067797, -0.0028658, 0.003197, 0.0076896, 0.0076028, 0.0026174, -0.0044718, -0.0092868, -0.008534, -0.0022054, 0.0061279, 0.01128, 0.0096244, 0.0015614, -0.0083444, -0.013874, -0.010969, -5.6468E-4, 0.011455, 0.017461, 0.01276, -0.0010262, -0.016164, -0.022908, -0.015444, 0.0037854, 0.024249, 0.03255, 0.020318, -0.0095077, -0.041874, -0.055528, -0.033308, 0.02819, 0.11468, 0.19857, 0.25007, 0.25007, 0.19857, 0.11468, 0.02819, -0.033308, -0.055528, -0.041874, -0.0095077, 0.020318
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, -0.0025968, -0.0031255, -0.0017511, 5.7881E-4, 0.002408, 0.0026763, 0.0013276, -7.237E-4, -0.0022045, -0.0022683, -9.7311E-4, 8.1468E-4, 0.0019933, 0.0019007, 6.801E-4, -8.6101E-4, -0.0017801, -0.0015723, -4.4169E-4, 8.7113E-4, 0.0015701, 0.0012819, 2.5207E-4, -8.5273E-4, -0.001367, -0.0010287, -1.0417E-4, 8.1167E-4, 0.0011744, 8.1051E-4, -6.7519E-6, -7.5513E-4, -9.9487E-4, -6.2455E-4, 8.6099E-5, 6.8693E-4, 8.3027E-4, 4.6928E-4, -1.3912E-4, -6.1268E-4, -6.8209E-4, -3.4174E-4, 1.7021E-4, 5.3497E-4, 5.5005E-4, 2.3889E-4, -1.8388E-4, -4.5776E-4
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]
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, -0.0169697, -0.0112239, -0.0059202, -0.0022838, 0.0065862
]
, ra = [-0.0086492, -0.0044524, -0.0043664, -0.0030946, -3.094E-4, 0.0042348, 0.010627, 0.018809, 0.028525, 0.039333, 0.050605, 0.061655, 0.071697, 0.079997, 0.085925, 0.089013, 0.089013, 0.085925, 0.079997, 0.071697, 0.061655, 0.050605, 0.039333, 0.028525, 0.018809, 0.010627, 0.0042348, -3.094E-4, -0.0030946, -0.0043664, -0.0044524, -0.0086492]
, sa = [0.0080236, 0.001488, -0.0074204, -0.0175495, -0.0195816, -0.0075536, 0.0136434, 0.0283156, 0.020311, -0.0121801, -0.0489419, -0.0561146, -0.0078976
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]
, da = !0
, G = 1E3
, K = !1
, T = 0
, U = 0
, ea = 0
, ka = 0
, H = 5
, N = 25
, g, f, w, u = []
, F = 0
, D, z, O = 0
, W = 0
, ga = 0
, P = 0
, X = 0
, Y = 0
, ha = 0;
if (g = document.ct)
{
/firefox\/([0-9]+)/i.exec(navigator.userAgent) && (F = 1);
g.sampleRate = h;
var h = g.sampleRate
, I = 2048
, I = 2 * I;
try
{
f = g.createScriptProcessor(I, 0, 1)
}
catch (ua)
{
f = g.createJavaScriptNode(I, 1, 1)
}
f.onaudioprocess =
ca;
this.p = f;
w = g.createConvolver();
f.connect(w);
w.connect(g.destination);
var j, e;
window.sup_android ? (e = g.createBuffer(1, 32, h), j = e.getChannelData(0), j.set(fa), u[0] = e, e = g.createBuffer(1, 32, h), j = e.getChannelData(0), j.set(fa), u[1] = e, e = g.createBuffer(1, 32, h), j = e.getChannelData(0), j.set(ra), u[2] = e, e = g.createBuffer(1, 32, h), j = e.getChannelData(0), j.set(sa)) : (e = g.createBuffer(1, 512, h), j = e.getChannelData(0), j.set(oa), u[0] = e, e = g.createBuffer(1, 512, h), j = e.getChannelData(0), j.set(na), u[1] = e, e = g.createBuffer(1, 512
, h), j = e.getChannelData(0), j.set(pa), u[2] = e, e = g.createBuffer(1, 512, h), j = e.getChannelData(0), j.set(qa));
u[3] = e;
w.normalize = !1;
w.buffer = u[0];
F && (D = g.createScriptProcessor(I, 1, 1), f.connect(D), D.onaudioprocess = la)
}
else(z = new Audio) && z.mozSetup ? z.mozSetup(1, h) : (z = m, window.browsersupporterror && window.browsersupporterror());
var Z = 0
, Q = 0.3 * h
, R;
doe = function()
{
if (z)
{
var a = z.mozCurrentSampleOffset()
, b = Math.round(Q - (O - a));
0 == Z && (0 == a ? b = Math.round(0.05 * h) : (Z = O, Q = Z + Math.round(0.05 * h), Q < 0.25 * h && (Q = Math.round(0.25 *
h))));
for (var c = [], a = 0; a < b; a++)
{
var e = t[q]
, g = B * C / h;
k += g;
if (1 <= k)
{
k -= 1;
t[q] = 0;
q++;
q >= r && (q -= r);
var d = t[q];
da && (e = (k * d + (g - k) * e) / g)
}
K && (e = 0);
(e = 2E-5 * e * S) || (e = 0);
g = 0.044 * e + 0.088 * W + 0.044 * ga - -1.354 * P - 0.53 * X;
d = 0.044 * g + 0.088 * P + 0.044 * X - -1.354 * Y - 0.53 * ha;
ga = W;
W = e;
X = P;
P = g;
ha = Y;
Y = d;
c[a] = d;
3 == R && (c[a] = e)
}
T = (new Date).getTime();
b = z.mozWriteAudio(c);
O += b
}
};
wss_scheme = location.protocol.match(/^https/) ? "wss" : "ws";
var ia, v, $, J = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
, A = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
, M = 0
, n = new WebSocket(wss_scheme + "://" + window.location.host + "/~~stream?v=11");
n.binaryType = "arraybuffer";
var E = 500;
n.onmessage = function(a)
{
g || doe();
var b = (2 * r + l - q - ((new Date).getTime() - T) * C / 1E3) % r;
E += 0.01 * (b - E);
E > 2 * G && (q = (r + l - G) % r, b = E = G);
B = 1 + 1E-5 * (E - G);
1.002 < B && (B = 1.002);
0.998 > B && (B = 0.998);
b = Math.round(b) + " " + Math.round(G) + " " + Math.round(E) + " " + Math.round(1E6 * (B - 1)) + " " + Math.round(C);
b += g ? " WebAudio" : z ? " MozAudio" : " none";
b += "<br>";
F && (b += " FFbug " + (F - 1) + "(" + H + "," + N + ")");
document.getElementById("soundappletdebug").innerHTML = b;
var b = new Uint8Array(a.data)
, c;
a = l;
for (c = 0; c < b.length; c++)
{
var e =
0
, h = 0;
if (240 == (b[c] & 240)) smeter = 256 * (b[c] & 15) + b[c + 1], c++;
else if (128 == b[c])
{
var d;
for (d = 0; 128 > d; d++) t[l + d] = ma[b[c + 1 + d]];
l += 128;
l >= r && (l -= r);
c += 128;
var f;
for (f = 0; 20 > f; f++) J[f] = A[f] = 0;
M = 0
}
else if (144 <= b[c] && 223 >= b[c]) h = 4, e = 2, v = 14 - (b[c] >> 4);
else if (128 != (b[c] & 128)) h = 1, e = 2;
else if (129 == b[c]) C = 256 * b[c + 1] + b[c + 2], 0 < C ? V = 1 : (V = 0, stopall()), c += 2;
else if (130 == b[c]) ia = 256 * b[c + 1] + b[c + 2], c += 2;
else if (131 == b[c]) $ = b[c + 1], f = b[c + 1] & 15, f != R && (R = f, w && (w.buffer = u[R])), c++;
else if (132 == b[c])
{
for (d = 0; 128 > d; d++) t[l + d] = 0;
l += 128;
l >= r && (l -= r);
for (f = 0; 20 > f; f++) J[f] = A[f] = 0;
M = 0
}
if (2 == e)
{
e = 0;
for (f = 16 == ($ & 16) ? 12 : 14; 128 > e;)
{
d = b[c + 3] & 255 | (b[c + 2] & 255) << 8 | (b[c + 1] & 255) << 16 | (b[c + 0] & 255) << 24;
d <<= h;
var p = 0
, j;
j = 15 - v;
var k = ia
, s = [999, 999, 8, 4, 2, 1, 99, 99];
if (0 != d)
for (; 0 == (d & 2147483648) && p < j;) d <<= 1, p++;
p < j ? (j = p, p++, d <<= 1) : (j = d >> 24 & 255, p += 8, d <<= 8);
var n = 0;
j >= s[v] && n++;
j >= s[v - 1] && n++;
n > v - 1 && (n = v - 1);
s = (d >> 16 & 65535) >> 17 - v & -1 << n;
s += j << v - 1;
0 != (d & 1 << 32 - v + n) && (s |= (1 << n) - 1, s = ~s);
for (h += p + v - n; 8 <= h;) c++, h -= 8;
for (d = p = 0; 20 > d; d++) p += J[d] * A[d];
p |= 0;
p = 0 <= p ? p >> 12 : p + 4095 >> 12;
k = s * k + k / 2;
s = k >> 4;
for (d = 19; 0 <= d; d--)
{
J[d] += -(J[d] >> 7) + (A[d] * s >> f);
if (0 == d) break;
A[d] = A[d - 1]
}
A[0] = p + k;
k = A[0] + (M >> 4);
M = 16 == ($ & 16) ? 0 : M + (A[0] << 4 >> 3);
t[l++] = k;
l >= r && (l -= r);
e++
}
0 == h && c--
}
}
if (L)
for (; a != l;)
{
if (1E4 > C || a & 1) L.setInt16(x, t[a], !0), x += 2, 65536 <= x && (b = new ArrayBuffer(65536), x = 0, L = new DataView(b), y.push(b));
a++;
a >= r && (a -= r)
}
};
n.onopen = function()
{
soundappletstarted()
};
n.onclose = function()
{
for (var a = 0; a < r; a++) t[a] = 0;
n.onclose = m;
n = n.onmessage = m
};
this.setparam = function(a)
{
n.send("GET /~~param?" +
a)
};
this.smeter = function()
{
return 10 * smeter
};
this.getid = function()
{
return V
};
this.mute = function()
{
K = !K
};
this.setvolume = function(a)
{
S = a
};
this.setdelay1 = function(a)
{
E = G = a;
q = (r + l - G) % r
};
stopall = function()
{
g ? (n.close(), f.onaudioprocess = m, f.disconnect(), f.destination = m, F && (D.onaudioprocess = m, D.disconnect(D), D.destination = m), j = u = this.p = g = w = f = m) : (n.close(), z = m)
};
this.destroy = function()
{
stopall();
window.soundapplet = m
};
this.rec_start = function()
{
x = 0;
var a = new ArrayBuffer(65536);
L = new DataView(a);
y = [a]
};
this.rec_finish =
function()
{
y[y.length - 1] = y[y.length - 1].slice(0, x);
L = m;
var a = {};
a.wavdata = y;
a.len = 65536 * (y.length - 1) + x;
a.sr = C;
1E4 <= a.sr && (a.sr /= 2);
return a
};
this.rec_length_kB = function()
{
return (65536 * (y.length - 1) + x) / 1024
}
}
window.prep_html5sound = function()
{
window.soundapplet = new ta
};
prep_html5sound();
})();