Apply layout-test-tidy to LayoutTests/webaudio

third_party/WebKit/LayoutTests/webaudio/resources/panner-formulas.js

 // For the record, these distance formulas were taken from the OpenAL
 // spec
 // (http://connect.creativelabs.com/openal/Documentation/OpenAL%201.1%20Specification.pdf),
 // not the code.  The Web Audio spec follows the OpenAL formulas.
 
 function linearDistance(panner, x, y, z) {
-    var distance = Math.sqrt(x * x + y * y + z * z);
-    var dref = Math.min(panner.refDistance, panner.maxDistance);
-    var dmax = Math.max(panner.refDistance, panner.maxDistance);
-    distance = Math.max(Math.min(distance, dmax), dref);
-    var rolloff = Math.max(Math.min(panner.rolloffFactor, 1), 0);
-    if (dref === dmax)
-      return 1 - rolloff;
+  let distance = Math.sqrt(x * x + y * y + z * z);
+  let dref = Math.min(panner.refDistance, panner.maxDistance);
+  let dmax = Math.max(panner.refDistance, panner.maxDistance);
+  distance = Math.max(Math.min(distance, dmax), dref);
+  let rolloff = Math.max(Math.min(panner.rolloffFactor, 1), 0);
+  if (dref === dmax)
+    return 1 - rolloff;
 
-    var gain = (1 - rolloff * (distance - dref) / (dmax - dref));
+  let gain = (1 - rolloff * (distance - dref) / (dmax - dref));
 
-    return gain;
+  return gain;
 }
 
 function inverseDistance(panner, x, y, z) {
-    var distance = Math.sqrt(x * x + y * y + z * z);
-    distance = Math.max(distance, panner.refDistance);
-    var rolloff = panner.rolloffFactor;
-    var gain = panner.refDistance / (panner.refDistance + rolloff * (Math.max(distance, panner.refDistance) - panner.refDistance));
+  let distance = Math.sqrt(x * x + y * y + z * z);
+  distance = Math.max(distance, panner.refDistance);
+  let rolloff = panner.rolloffFactor;
+  let gain = panner.refDistance /
+      (panner.refDistance +
+       rolloff * (Math.max(distance, panner.refDistance) - panner.refDistance));
 
-    return gain;
+  return gain;
 }
 
 function exponentialDistance(panner, x, y, z) {
-    var distance = Math.sqrt(x * x + y * y + z * z);
-    distance = Math.max(distance, panner.refDistance);
-    var rolloff = panner.rolloffFactor;
-    var gain = Math.pow(distance / panner.refDistance, -rolloff);
+  let distance = Math.sqrt(x * x + y * y + z * z);
+  distance = Math.max(distance, panner.refDistance);
+  let rolloff = panner.rolloffFactor;
+  let gain = Math.pow(distance / panner.refDistance, -rolloff);
 
-    return gain;
+  return gain;
 }
 
 // Simple implementations of 3D vectors implemented as a 3-element array.
 
 // x - y
 function vec3Sub(x, y) {
-    var z = new Float32Array(3);
-    z[0] = x[0] - y[0];
-    z[1] = x[1] - y[1];
-    z[2] = x[2] - y[2];
+  let z = new Float32Array(3);
+  z[0] = x[0] - y[0];
+  z[1] = x[1] - y[1];
+  z[2] = x[2] - y[2];
 
-    return z;
+  return z;
 }
 
 // x/|x|
 function vec3Normalize(x) {
-    var mag = Math.hypot(...x);
-    return x.map(function (c) { return c / mag; });
+  let mag = Math.hypot(...x);
+  return x.map(function(c) {
+    return c / mag;
+  });
 }
 
 // x == 0?
 function vec3IsZero(x) {
-    return x[0] === 0 && x[1] === 0 && x[2] === 0;
+  return x[0] === 0 && x[1] === 0 && x[2] === 0;
 }
 
 // Vector cross product
 function vec3Cross(u, v) {
-    var cross = new Float32Array(3);
-    cross[0] = u[1] * v[2] - u[2] * v[1];
-    cross[1] = u[2] * v[0] - u[0] * v[2];
-    cross[2] = u[0] * v[1] - u[1] * v[0];
-    return cross;
+  let cross = new Float32Array(3);
+  cross[0] = u[1] * v[2] - u[2] * v[1];
+  cross[1] = u[2] * v[0] - u[0] * v[2];
+  cross[2] = u[0] * v[1] - u[1] * v[0];
+  return cross;
 }
 
 // Dot product
 function vec3Dot(x, y) {
-    return x[0] * y[0] + x[1] * y[1] + x[2] * y[2];
+  return x[0] * y[0] + x[1] * y[1] + x[2] * y[2];
 }
 
 // a*x, for scalar a
 function vec3Scale(a, x) {
-    return x.map(function (c) { return a * c; });
+  return x.map(function(c) {
+    return a * c;
+  });
 }
 
 function calculateAzimuth(source, listener, listenerForward, listenerUp) {
-    var sourceListener = vec3Sub(source, listener);
+  let sourceListener = vec3Sub(source, listener);
 
-    if (vec3IsZero(sourceListener))
-        return 0;
+  if (vec3IsZero(sourceListener))
+    return 0;
 
-    sourceListener = vec3Normalize(sourceListener);
+  sourceListener = vec3Normalize(sourceListener);
 
-    var listenerRight = vec3Normalize(vec3Cross(listenerForward, listenerUp));
-    var listenerForwardNorm = vec3Normalize(listenerForward);
+  let listenerRight = vec3Normalize(vec3Cross(listenerForward, listenerUp));
+  let listenerForwardNorm = vec3Normalize(listenerForward);
 
-    var up = vec3Cross(listenerRight, listenerForwardNorm);
-    var upProjection = vec3Dot(sourceListener, up);
+  let up = vec3Cross(listenerRight, listenerForwardNorm);
+  let upProjection = vec3Dot(sourceListener, up);
 
-    var projectedSource = vec3Normalize(vec3Sub(sourceListener, vec3Scale(upProjection, up)));
+  let projectedSource =
+      vec3Normalize(vec3Sub(sourceListener, vec3Scale(upProjection, up)));
 
-    var azimuth = 180 / Math.PI * Math.acos(vec3Dot(projectedSource, listenerRight));
+  let azimuth =
+      180 / Math.PI * Math.acos(vec3Dot(projectedSource, listenerRight));
 
-    // Source in front or behind the listener
-    var frontBack = vec3Dot(projectedSource, listenerForwardNorm);
-    if (frontBack < 0)
-        azimuth = 360 - azimuth;
+  // Source in front or behind the listener
+  let frontBack = vec3Dot(projectedSource, listenerForwardNorm);
+  if (frontBack < 0)
+    azimuth = 360 - azimuth;
 
-    // Make azimuth relative to "front" and not "right" listener vector.
-    if (azimuth >= 0 && azimuth <= 270)
-        azimuth = 90 - azimuth;
-    else
-        azimuth = 450 - azimuth;
+  // Make azimuth relative to "front" and not "right" listener vector.
+  if (azimuth >= 0 && azimuth <= 270)
+    azimuth = 90 - azimuth;
+  else
+    azimuth = 450 - azimuth;
 
-    // We don't need elevation, so we're skipping that computation.
-    return azimuth;
+  // We don't need elevation, so we're skipping that computation.
+  return azimuth;
 }
 
 // Map our position angle to the azimuth angle (in degrees).
 //
 // An angle of 0 corresponds to an azimuth of 90 deg; pi, to -90 deg.
 function angleToAzimuth(angle) {
-    return 90 - angle * 180 / Math.PI;
+  return 90 - angle * 180 / Math.PI;
 }
 
 // The gain caused by the EQUALPOWER panning model
 function equalPowerGain(azimuth, numberOfChannels) {
-    var halfPi = Math.PI / 2;
+  let halfPi = Math.PI / 2;
 
-    if (azimuth < -90)
-        azimuth = -180 - azimuth;
-    else
-        azimuth = 180 - azimuth;
+  if (azimuth < -90)
+    azimuth = -180 - azimuth;
+  else
+    azimuth = 180 - azimuth;
 
-    if (numberOfChannels == 1) {
-        var panPosition = (azimuth + 90) / 180;
+  if (numberOfChannels == 1) {
+    let panPosition = (azimuth + 90) / 180;
 
-        var gainL = Math.cos(halfPi * panPosition);
-        var gainR = Math.sin(halfPi * panPosition);
+    let gainL = Math.cos(halfPi * panPosition);
+    let gainR = Math.sin(halfPi * panPosition);
 
-        return { left : gainL, right : gainR };
+    return {left: gainL, right: gainR};
+  } else {
+    if (azimuth <= 0) {
+      let panPosition = (azimuth + 90) / 90;
+
+      let gainL = Math.cos(halfPi * panPosition);
+      let gainR = Math.sin(halfPi * panPosition);
+
+      return {left: gainL, right: gainR};
     } else {
-        if (azimuth <= 0) {
-            var panPosition = (azimuth + 90) / 90;
+      let panPosition = azimuth / 90;
 
-            var gainL = Math.cos(halfPi * panPosition);
-            var gainR = Math.sin(halfPi * panPosition);
+      let gainL = Math.cos(halfPi * panPosition);
+      let gainR = Math.sin(halfPi * panPosition);
 
-            return { left : gainL, right : gainR };
-        } else {
-            var panPosition = azimuth / 90;
-
-            var gainL = Math.cos(halfPi * panPosition);
-            var gainR = Math.sin(halfPi * panPosition);
-
-            return { left : gainL, right : gainR };
-        }
+      return {left: gainL, right: gainR};
     }
+  }
 }
 
 function applyPanner(azimuth, srcL, srcR, numberOfChannels) {
-    var length = srcL.length;
-    var outL = new Float32Array(length);
-    var outR = new Float32Array(length);
+  let length = srcL.length;
+  let outL = new Float32Array(length);
+  let outR = new Float32Array(length);
 
-    if (numberOfChannels == 1) {
-        for (var k = 0; k < length; ++k) {
-            var gains = equalPowerGain(azimuth[k], numberOfChannels);
+  if (numberOfChannels == 1) {
+    for (let k = 0; k < length; ++k) {
+      let gains = equalPowerGain(azimuth[k], numberOfChannels);
 
-            outL[k] = srcL[k] * gains.left;
-            outR[k] = srcR[k] * gains.right;
-        }
-    } else {
-        for (var k = 0; k < length; ++k) {
-            var gains = equalPowerGain(azimuth[k], numberOfChannels);
+      outL[k] = srcL[k] * gains.left;
+      outR[k] = srcR[k] * gains.right;
+    }
+  } else {
+    for (let k = 0; k < length; ++k) {
+      let gains = equalPowerGain(azimuth[k], numberOfChannels);
 
-            if (azimuth[k] <= 0) {
-                outL[k] = srcL[k] + srcR[k] * gains.left;
-                outR[k] = srcR[k] * gains.right;
-            } else {
-                outL[k] = srcL[k] * gains.left;
-                outR[k] = srcR[k] + srcL[k] * gains.right;
-            }
-        }
+      if (azimuth[k] <= 0) {
+        outL[k] = srcL[k] + srcR[k] * gains.left;
+        outR[k] = srcR[k] * gains.right;
+      } else {
+        outL[k] = srcL[k] * gains.left;
+        outR[k] = srcR[k] + srcL[k] * gains.right;
+      }
     }
+  }
 
-    return { left: outL, right: outR };
+  return {left: outL, right: outR};
 }