From 0b4e847cf0ed8251f5023d306d9e6c047fdb7268 Mon Sep 17 00:00:00 2001
From: Rafael Rocha <rocha.rafaelsilva@gmail.com>
Date: Wed, 11 Sep 2019 04:28:04 -0300
Subject: [PATCH] Fix: encode() return a even number of samples

---
 CHANGELOG.md              | 3 +++
 dist/imaadpcm.cjs.js      | 6 +++++-
 dist/imaadpcm.js          | 6 +++++-
 dist/imaadpcm.min.js      | 4 ++--
 dist/imaadpcm.umd.js      | 6 +++++-
 docs/index.html           | 2 +-
 docs/index.js.html        | 8 ++++++--
 docs/module-imaadpcm.html | 8 ++++----
 index.js                  | 6 +++++-
 package-lock.json         | 2 +-
 package.json              | 2 +-
 11 files changed, 38 insertions(+), 15 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index c094b02..b5688c3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # CHANGELOG
 
+## v4.1.1 (2019-09-11)
+- Fix: encode() should always return a even number of samples
+
 ## v4.1.0 (2019-09-06)
 - No clicks or time changes when compressing/decompressing
 - Fix: Range error bug when compressing
diff --git a/dist/imaadpcm.cjs.js b/dist/imaadpcm.cjs.js
index 7aeacfc..036d2c6 100644
--- a/dist/imaadpcm.cjs.js
+++ b/dist/imaadpcm.cjs.js
@@ -105,7 +105,11 @@ function encode(samples) {
     }
     block.push(samples[i]);
   }
-  return adpcmSamples.slice(0, (samples.length/2) + 512);
+  let samplesLength = (samples.length / 2);
+  if (samplesLength % 2) {
+    samplesLength--;
+  }
+  return adpcmSamples.slice(0, samplesLength + 512);
 }
 
 /**
diff --git a/dist/imaadpcm.js b/dist/imaadpcm.js
index 9981236..eae59fa 100644
--- a/dist/imaadpcm.js
+++ b/dist/imaadpcm.js
@@ -101,7 +101,11 @@ function encode(samples) {
     }
     block.push(samples[i]);
   }
-  return adpcmSamples.slice(0, (samples.length/2) + 512);
+  let samplesLength = (samples.length / 2);
+  if (samplesLength % 2) {
+    samplesLength--;
+  }
+  return adpcmSamples.slice(0, samplesLength + 512);
 }
 
 /**
diff --git a/dist/imaadpcm.min.js b/dist/imaadpcm.min.js
index 295dd82..53ce1ae 100644
--- a/dist/imaadpcm.min.js
+++ b/dist/imaadpcm.min.js
@@ -5,5 +5,5 @@
 */
 window.imaadpcm=function(m){function q(b){var a=b[0];n(a);var c=[];c.push(a&255);c.push(a>>8&255);c.push(k);c.push(0);for(a=3;a<b.length;a+=2){var d=n(b[a]),f=n(b[a+1]);c.push(f<<4|d)}return c}function r(b){var a=b[1]<<8|b[0];e=32768<a?a-65536:a;g=b[2];l=p[g];a=[e,e];for(var c=4;c<b.length;c++){var d=b[c],f=d>>4;a.push(t(f<<4^d));a.push(t(f))}return a}function n(b){var a=b-h;0<=a?b=0:(b=8,a=-a);var c=p[k],d=c>>3;a>c&&(b|=4,a-=c,d+=c);c>>=1;a>c&&(b|=2,a-=c,d+=c);c>>=1;a>c&&(b|=1,d+=c);a=b;h=a&8?h-
 d:h+d;-32768>h?h=-32768:32767<h&&(h=32767);k+=u[a&7];0>k?k=0:88<k&&(k=88);return b}function t(b){var a=0;b&4&&(a+=l);b&2&&(a+=l>>1);b&1&&(a+=l>>2);a+=l>>3;b&8&&(a=-a);e+=a;32767<e?e=32767:-32767>e&&(e=-32767);g+=u[b];0>g?g=0:88<g&&(g=88);l=p[g];return e}var u=[-1,-1,-1,-1,2,4,6,8,-1,-1,-1,-1,2,4,6,8],p=[7,8,9,10,11,12,13,14,16,17,19,21,23,25,28,31,34,37,41,45,50,55,60,66,73,80,88,97,107,118,130,143,157,173,190,209,230,253,279,307,337,371,408,449,494,544,598,658,724,796,876,963,1060,1166,1282,1411,
-1552,1707,1878,2066,2272,2499,2749,3024,3327,3660,4026,4428,4871,5358,5894,6484,7132,7845,8630,9493,10442,11487,12635,13899,15289,16818,18500,20350,22385,24623,27086,29794,32767],h=0,k=0,e=0,g=0,l=7;m.encode=function(b){for(var a=new Uint8Array(b.length),c=[],d=0,f=0;f<b.length;f++)0==f%505&&0!=f&&(a.set(q(c),d),d+=256,c=[]),c.push(b[f]);return a.slice(0,b.length/2+512)};m.decode=function(b,a){a=void 0===a?256:a;for(var c=new Int16Array(2*b.length),d=[],f=0,e=0;e<b.length;e++)0==e%a&&0!=e&&(d=r(d),
-c.set(d,f),f+=d.length,d=[]),d.push(b[e]);return c};m.encodeBlock=q;m.decodeBlock=r;return m}({});
+1552,1707,1878,2066,2272,2499,2749,3024,3327,3660,4026,4428,4871,5358,5894,6484,7132,7845,8630,9493,10442,11487,12635,13899,15289,16818,18500,20350,22385,24623,27086,29794,32767],h=0,k=0,e=0,g=0,l=7;m.encode=function(b){for(var a=new Uint8Array(b.length),c=[],d=0,f=0;f<b.length;f++)0==f%505&&0!=f&&(a.set(q(c),d),d+=256,c=[]),c.push(b[f]);b=b.length/2;b%2&&b--;return a.slice(0,b+512)};m.decode=function(b,a){a=void 0===a?256:a;for(var c=new Int16Array(2*b.length),d=[],f=0,e=0;e<b.length;e++)0==e%a&&
+0!=e&&(d=r(d),c.set(d,f),f+=d.length,d=[]),d.push(b[e]);return c};m.encodeBlock=q;m.decodeBlock=r;return m}({});
diff --git a/dist/imaadpcm.umd.js b/dist/imaadpcm.umd.js
index 4316e48..1c8fc36 100644
--- a/dist/imaadpcm.umd.js
+++ b/dist/imaadpcm.umd.js
@@ -107,7 +107,11 @@
       }
       block.push(samples[i]);
     }
-    return adpcmSamples.slice(0, (samples.length/2) + 512);
+    let samplesLength = (samples.length / 2);
+    if (samplesLength % 2) {
+      samplesLength--;
+    }
+    return adpcmSamples.slice(0, samplesLength + 512);
   }
 
   /**
diff --git a/docs/index.html b/docs/index.html
index dddb8df..6ba10a0 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -225,7 +225,7 @@ <h2>
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Fri Sep 06 2019 13:38:13 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Wed Sep 11 2019 04:25:44 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
 </footer>
 
 <script>prettyPrint();</script>
diff --git a/docs/index.js.html b/docs/index.js.html
index 810be45..8bda810 100644
--- a/docs/index.js.html
+++ b/docs/index.js.html
@@ -145,7 +145,11 @@ <h1 class="page-title">index.js</h1>
     }
     block.push(samples[i]);
   }
-  return adpcmSamples.slice(0, (samples.length/2) + 512);
+  let samplesLength = (samples.length / 2);
+  if (samplesLength % 2) {
+    samplesLength--;
+  }
+  return adpcmSamples.slice(0, samplesLength + 512);
 }
 
 /**
@@ -370,7 +374,7 @@ <h1 class="page-title">index.js</h1>
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Fri Sep 06 2019 13:38:13 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Wed Sep 11 2019 04:25:44 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
 </footer>
 
 <script>prettyPrint();</script>
diff --git a/docs/module-imaadpcm.html b/docs/module-imaadpcm.html
index a99c9c7..4492d97 100644
--- a/docs/module-imaadpcm.html
+++ b/docs/module-imaadpcm.html
@@ -84,7 +84,7 @@ <h4 class="name" id=".decode"><span class="type-signature">(static) </span>decod
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="index.js.html">index.js</a>, <a href="index.js.html#line118">line 118</a>
+        <a href="index.js.html">index.js</a>, <a href="index.js.html#line122">line 122</a>
     </li></ul></dd>
     
 
@@ -258,7 +258,7 @@ <h4 class="name" id=".decodeBlock"><span class="type-signature">(static) </span>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="index.js.html">index.js</a>, <a href="index.js.html#line160">line 160</a>
+        <a href="index.js.html">index.js</a>, <a href="index.js.html#line164">line 164</a>
     </li></ul></dd>
     
 
@@ -560,7 +560,7 @@ <h4 class="name" id=".encodeBlock"><span class="type-signature">(static) </span>
     
     <dt class="tag-source">Source:</dt>
     <dd class="tag-source"><ul class="dummy"><li>
-        <a href="index.js.html">index.js</a>, <a href="index.js.html#line142">line 142</a>
+        <a href="index.js.html">index.js</a>, <a href="index.js.html#line146">line 146</a>
     </li></ul></dd>
     
 
@@ -712,7 +712,7 @@ <h5>Returns:</h5>
 <br class="clear">
 
 <footer>
-    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Fri Sep 06 2019 13:38:13 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
+    Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.5.5</a> on Wed Sep 11 2019 04:25:44 GMT-0300 (Hora oficial do Brasil) using the <a href="https://github.com/clenemt/docdash">docdash</a> theme.
 </footer>
 
 <script>prettyPrint();</script>
diff --git a/index.js b/index.js
index 91d2f2c..aed2529 100644
--- a/index.js
+++ b/index.js
@@ -106,7 +106,11 @@ export function encode(samples) {
     }
     block.push(samples[i]);
   }
-  return adpcmSamples.slice(0, (samples.length/2) + 512);
+  let samplesLength = (samples.length / 2);
+  if (samplesLength % 2) {
+    samplesLength--;
+  }
+  return adpcmSamples.slice(0, samplesLength + 512);
 }
 
 /**
diff --git a/package-lock.json b/package-lock.json
index d6168a4..02a9988 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "imaadpcm",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 14ed834..0e8bec3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "imaadpcm",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "IMA ADPCM codec in JavaScript.",
   "homepage": "https://github.com/rochars/imaadpcm",
   "author": "Rafael S. Rocha <rocha.rafaelsilva@gmail.com>",