[WIP] Spectral Band Replication for HE-AAC v1

.babelrc

@@ -0,0 +1,4 @@
+{
+  "presets": ["es2015"],
+  "plugins": ["multidimensional-array"]
+}

src/PooledObject.js

@@ -0,0 +1,14 @@
+export default class PooledObject {
+  static getFromPool() {
+    let pool = this._pool || (this._pool = []);
+    let obj = pool.length ? pool.pop() : new this(...arguments);
+    obj.init(...arguments)
+    return obj;
+  }
+
+  init() {}
+  release() {
+    let pool = this.constructor._pool || (this.constructor._pool = []);
+    pool.push(this);
+  }
+}

src/adts_demuxer.js

@@ -1,10 +1,8 @@
 var AV = require('av');
 var tables = require('./tables');
 
-var ADTSDemuxer = AV.Demuxer.extend(function() {
-    AV.Demuxer.register(this);
-
-    this.probe = function(stream) {
+class ADTSDemuxer extends AV.Demuxer {
+    static probe(stream) {
         var offset = stream.offset;
 
         // attempt to find ADTS syncword
@@ -17,15 +15,15 @@ var ADTSDemuxer = AV.Demuxer.extend(function() {
 
         stream.seek(offset);
         return false;
-    };
+    }
 
-    this.prototype.init = function() {
+    init() {
         this.bitstream = new AV.Bitstream(this.stream);
-    };
+    }
 
     // Reads an ADTS header
     // See http://wiki.multimedia.cx/index.php?title=ADTS
-    this.readHeader = function(stream) {
+    static readHeader(stream) {
         if (stream.read(12) !== 0xfff)
             throw new Error('Invalid ADTS header.');
 
@@ -49,9 +47,9 @@ var ADTSDemuxer = AV.Demuxer.extend(function() {
             stream.advance(16);
 
         return ret;
-    };
+    }
 
-    this.prototype.readChunk = function() {
+    readChunk() {
         if (!this.sentHeader) {
             var offset = this.stream.offset;
             var header = ADTSDemuxer.readHeader(this.bitstream);
@@ -77,7 +75,9 @@ var ADTSDemuxer = AV.Demuxer.extend(function() {
             var buffer = this.stream.readSingleBuffer(this.stream.remainingBytes());
             this.emit('data', buffer);
         }
-    };
-});
+    }
+}
+
+AV.Demuxer.register(ADTSDemuxer);
 
 module.exports = ADTSDemuxer;