bpm-detective - npm Package Compare versions

Comparing version 2.0.1 to 2.0.2

dist/bpm-detective.js

@@ -1,1 +0,1 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.DetectBPM=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports.default=detect;var OfflineContext=window.OfflineAudioContext||window.webkitOfflineAudioContext;function detect(buffer){var source=getLowPassSource(buffer);source.start(0);return[findPeaks,identifyIntervals,groupByTempo(buffer.sampleRate),getTopCandidate].reduce(function(state,fn){return fn(state)},source.buffer.getChannelData(0))}function getTopCandidate(candidates){return candidates.sort(function(a,b){return b.count-a.count}).splice(0,5)[0].tempo}function getLowPassSource(buffer){var length=buffer.length;var numberOfChannels=buffer.numberOfChannels;var sampleRate=buffer.sampleRate;var context=new OfflineContext(numberOfChannels,length,sampleRate);var source=context.createBufferSource();source.buffer=buffer;var filter=context.createBiquadFilter();filter.type="lowpass";source.connect(filter);filter.connect(context.destination);return source}function findPeaks(data){var peaks=[];var threshold=.9;var minThresold=.3;var minPeaks=15;while(peaks.length<minPeaks&&threshold>=minThresold){peaks=findPeaksAtThreshold(data,threshold);threshold-=.05}if(peaks.length<minPeaks){throw new Error("Could not find enough samples for a reliable detection.")}return peaks}function findPeaksAtThreshold(data,threshold){var peaks=[];for(var i=0,l=data.length;i<l;i+=1){if(data[i]>threshold){peaks.push(i);i+=1e4}}return peaks}function identifyIntervals(peaks){var intervals=[];peaks.forEach(function(peak,index){var _loop=function _loop(i){var interval=peaks[index+i]-peak;var foundInterval=intervals.some(function(intervalCount){if(intervalCount.interval===interval){return intervalCount.count+=1}});if(!foundInterval){intervals.push({interval:interval,count:1})}};for(var i=0;i<10;i+=1){_loop(i)}});return intervals}function groupByTempo(sampleRate){return function(intervalCounts){var tempoCounts=[];intervalCounts.forEach(function(intervalCount){if(intervalCount.interval!==0){(function(){var theoreticalTempo=60/(intervalCount.interval/sampleRate);while(theoreticalTempo<90){theoreticalTempo*=2}while(theoreticalTempo>180){theoreticalTempo/=2}theoreticalTempo=Math.round(theoreticalTempo);var foundTempo=tempoCounts.some(function(tempoCount){if(tempoCount.tempo===theoreticalTempo){return tempoCount.count+=intervalCount.count}});if(!foundTempo){tempoCounts.push({tempo:theoreticalTempo,count:intervalCount.count})}})()}});return tempoCounts}}},{}],2:[function(require,module,exports){module.exports=require("./detect").default},{"./detect":1}]},{},[2])(2)});
+(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.DetectBPM=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports.default=detect;var OfflineContext=window.OfflineAudioContext||window.webkitOfflineAudioContext;function detect(buffer){var source=getLowPassSource(buffer);source.start(0);return[findPeaks,identifyIntervals,groupByTempo(buffer.sampleRate),getTopCandidate].reduce(function(state,fn){return fn(state)},source.buffer.getChannelData(0))}function getTopCandidate(candidates){return candidates.sort(function(a,b){return b.count-a.count}).splice(0,5)[0].tempo}function getLowPassSource(buffer){var length=buffer.length,numberOfChannels=buffer.numberOfChannels,sampleRate=buffer.sampleRate;var context=new OfflineContext(numberOfChannels,length,sampleRate);var source=context.createBufferSource();source.buffer=buffer;var filter=context.createBiquadFilter();filter.type="lowpass";source.connect(filter);filter.connect(context.destination);return source}function findPeaks(data){var peaks=[];var threshold=.9;var minThresold=.3;var minPeaks=15;while(peaks.length<minPeaks&&threshold>=minThresold){peaks=findPeaksAtThreshold(data,threshold);threshold-=.05}if(peaks.length<minPeaks){throw new Error("Could not find enough samples for a reliable detection.")}return peaks}function findPeaksAtThreshold(data,threshold){var peaks=[];for(var i=0,l=data.length;i<l;i+=1){if(data[i]>threshold){peaks.push(i);i+=1e4}}return peaks}function identifyIntervals(peaks){var intervals=[];peaks.forEach(function(peak,index){var _loop=function _loop(i){var interval=peaks[index+i]-peak;var foundInterval=intervals.some(function(intervalCount){if(intervalCount.interval===interval){return intervalCount.count+=1}});if(!foundInterval){intervals.push({interval:interval,count:1})}};for(var i=0;i<10;i+=1){_loop(i)}});return intervals}function groupByTempo(sampleRate){return function(intervalCounts){var tempoCounts=[];intervalCounts.forEach(function(intervalCount){if(intervalCount.interval!==0){var theoreticalTempo=60/(intervalCount.interval/sampleRate);while(theoreticalTempo<90){theoreticalTempo*=2}while(theoreticalTempo>180){theoreticalTempo/=2}theoreticalTempo=Math.round(theoreticalTempo);var foundTempo=tempoCounts.some(function(tempoCount){if(tempoCount.tempo===theoreticalTempo){return tempoCount.count+=intervalCount.count}});if(!foundTempo){tempoCounts.push({tempo:theoreticalTempo,count:intervalCount.count})}}});return tempoCounts}}},{}],2:[function(require,module,exports){module.exports=require("./detect").default},{"./detect":1}]},{},[2])(2)});

lib/detect.js

@@ -52,5 +52,5 @@ 'use strict';
 function getLowPassSource(buffer) {
-  var length = buffer.length;
-  var numberOfChannels = buffer.numberOfChannels;
-  var sampleRate = buffer.sampleRate;
+  var length = buffer.length,
+      numberOfChannels = buffer.numberOfChannels,
+      sampleRate = buffer.sampleRate;
 
@@ -207,44 +207,42 @@ var context = new OfflineContext(numberOfChannels, length, sampleRate);
       if (intervalCount.interval !== 0) {
-        (function () {
-          /**
-           * Convert an interval to tempo
-           */
+        /**
+         * Convert an interval to tempo
+         */
 
-          var theoreticalTempo = 60 / (intervalCount.interval / sampleRate);
+        var theoreticalTempo = 60 / (intervalCount.interval / sampleRate);
 
-          /**
-           * Adjust the tempo to fit within the 90-180 BPM range
+        /**
+         * Adjust the tempo to fit within the 90-180 BPM range
+         */
+
+        while (theoreticalTempo < 90) {
+          theoreticalTempo *= 2;
+        }while (theoreticalTempo > 180) {
+          theoreticalTempo /= 2;
+        } /**
+           * Round to legible integer
            */
 
-          while (theoreticalTempo < 90) {
-            theoreticalTempo *= 2;
-          }while (theoreticalTempo > 180) {
-            theoreticalTempo /= 2;
-          } /**
-             * Round to legible integer
-             */
+        theoreticalTempo = Math.round(theoreticalTempo);
 
-          theoreticalTempo = Math.round(theoreticalTempo);
+        /**
+         * See if another interval resolved to the same tempo
+         */
 
-          /**
-           * See if another interval resolved to the same tempo
-           */
+        var foundTempo = tempoCounts.some(function (tempoCount) {
+          if (tempoCount.tempo === theoreticalTempo) {
+            return tempoCount.count += intervalCount.count;
+          }
+        });
 
-          var foundTempo = tempoCounts.some(function (tempoCount) {
-            if (tempoCount.tempo === theoreticalTempo) {
-              return tempoCount.count += intervalCount.count;
-            }
+        /**
+         * Add a unique tempo to the collection
+         */
+
+        if (!foundTempo) {
+          tempoCounts.push({
+            tempo: theoreticalTempo,
+            count: intervalCount.count
           });
-
-          /**
-           * Add a unique tempo to the collection
-           */
-
-          if (!foundTempo) {
-            tempoCounts.push({
-              tempo: theoreticalTempo,
-              count: intervalCount.count
-            });
-          }
-        })();
+        }
       }
@@ -251,0 +249,0 @@ });

package.json

 {
   "name": "bpm-detective",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "description": "Detects the BPM of a song or audio sample",
@@ -5,0 +5,0 @@ "main": "lib/index.js",

README.md

@@ -5,3 +5,3 @@ # bpm-detective
 
-This module uses the [Web Audio API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API) to try and detect the BPM of a given sound. You can find more on the implementation and how it works by reading the blog post [Beat Detection Using JavaScript and the Web Audio API](http://tech.beatport.com/2014/web-audio/beat-detection-using-web-audio/) which happens to be where I got most of the code.
+This module uses the [Web Audio API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API) to try and detect the BPM of a given sound. You can find more on the implementation and how it works by reading the blog post [Beat Detection Using JavaScript and the Web Audio API](http://web.archive.org/web/20160401073744/http://tech.beatport.com/2014/web-audio/beat-detection-using-web-audio/) which happens to be where I got most of the code.
 
@@ -21,2 +21,3 @@ ## Install
 
+const AudioContext = window.AudioContext || window.webkitAudioContext;
 let context = new AudioContext();
@@ -28,4 +29,8 @@
   .then(response => response.arrayBuffer())
-  // Decode audio into an AudioBuffer
-  .then(data => context.decodeAudioData(data))
+  .then(buffer => {
+    // Decode audio into an AudioBuffer
+    return new Promise((resolve, reject) => {
+      context.decodeAudioData(buffer, resolve, reject);
+    });
+  })
   // Run detection
@@ -32,0 +37,0 @@ .then(buffer => {

New alerts

Major refactor

Supply chain risk

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

Found 1 instance in 1 package

Fixed alerts

Filesystem access

Supply chain risk

Accesses the file system, and could potentially read sensitive data.

Found 1 instance in 1 package

Improved metrics

Number of lines in readme file

50

increased by11.11%

Number of low supply chain risk alerts

2

decreased by-50%

Worsened metrics

Total package byte prevSize

17299

decreased by-98.87%

Number of package files

7

decreased by-91.67%

Lines of code

399

decreased by-98.73%

Number of medium supply chain risk alerts

1

increased byInfinity%

No dependency changes