slicer: rename "transients" to "peaks" as this reflects the truth better

lib/detect-transients.js → lib/detect-peaks.js

@@ -1,8 +1,7 @@
 module.exports = function (data, count, offset) {
-  offset = offset || [0,1]
+  offset = offset || [0, 1]
 
-
-  var range = (offset[1]-offset[0]) * data.length
+  var range = (offset[1] - offset[0]) * data.length
   var step = Math.ceil(range / (count * 2))
   var start = Math.floor(offset[0] * data.length)
   var end = Math.ceil(offset[1] * data.length)
@@ -15,15 +14,15 @@ module.exports = function (data, count, offset) {
 
   for (var pos = start + step; pos < end; pos += step) {
     var peak = getPeak(data, pos, frame)
-    if (peak[0] > peaks[peaks.length-1][0]) {
+    if (peak[0] > peaks[peaks.length - 1][0]) {
       peaks.push(peak)
     }
   }
 
-  var peaks = peaks.sort(function (a, b) {
-    return a[1]-b[1]
-  }).slice(-count).sort(function (a,b) {
-    return a[0]-b[0]
+  peaks = peaks.sort(function (a, b) {
+    return a[1] - b[1]
+  }).slice(-count).sort(function (a, b) {
+    return a[0] - b[0]
   })
 
   return peaks.map(function (item) {
@@ -39,7 +38,6 @@ function getPeak (data, offset, length) {
   var lastCross = pos
 
   for (var i = offset; i < end; i++) {
-
     if (data[i] === 0 || (i - lastCross > 128 && data[i] < 0.01 && data[i] > -0.01)) {
       lastCross = i
     }

nodes/slicer-chunk/object.js

@@ -9,7 +9,7 @@ var lookup = require('observ-node-array/lookup')
 var computed = require('observ/computed')
 var computedNextTick = require('lib/computed-next-tick')
 var ResolvedValue = require('observ-node-array/resolved-value')
-var detectTransients = require('lib/detect-transients')
+var detectPeaks = require('lib/detect-peaks')
 var throttle = require('throttle-observ')
 var throttleWatch = require('throttle-observ/watch')
 var extend = require('xtend')
@@ -41,11 +41,11 @@ function SlicerChunk (parentContext) {
   obs.sample.slices = computedNextTick([obs.shape, obs.sample.resolvedBuffer, throttle(obs.sample.offset, 1000), obs.sliceMode, obs.sample.mode], function (shape, buffer, offset, sliceMode, triggerMode) {
     var count = shape[0] * shape[1]
     var playToEnd = triggerMode === 'full'
-    if (sliceMode === 'transient') {
+    if (sliceMode === 'peak' || sliceMode === 'transient') {
       if (buffer) {
         var data = buffer.getChannelData(0)
-        var transients = detectTransients(data, count, offset)
-        return sliceOffsets(transients, offset, playToEnd)
+        var peaks = detectPeaks(data, count, offset)
+        return sliceOffsets(peaks, offset, playToEnd)
       }
     }
     return divideSlices(count, offset, playToEnd)

nodes/slicer-chunk/view.js

@@ -13,7 +13,7 @@ var renderEqParams = require('../eq/params')
 
 var sliceOptions = [
   ['Equal Slices', 'divide'],
-  ['Use Transients', 'transient']
+  ['Use Peaks', 'peak']
 ]
 
 var triggerOptions = [