mp3 test

assets/disk0/tvdos/include/js-mp3/util.js

@@ -0,0 +1,108 @@
+function init2dArray(root, prop, first, second) {
+    root[prop] = [];
+    for (var i = 0; i < first; i++) {
+        root[prop].push([]);
+    }
+
+    for(var i = 0; i < root[prop].length; i++) {
+        for (var j = 0; j < second; j++) {
+            root[prop][i].push(0);
+        }
+    }
+}
+
+function init3dArray(root, prop, first, second, third) {
+    root[prop] = [];
+    for (var i = 0; i < first; i++) {
+        root[prop].push([]);
+    }
+
+    for(var i = 0; i < root[prop].length; i++) {
+        for (var j = 0; j < second; j++) {
+            root[prop][i].push([])
+        }
+
+        for (var x = 0; x < root[prop][i].length; x++) {
+            for (var y = 0; y < third; y++) {
+                root[prop][i][x].push(0);
+            }
+        }
+    }
+}
+
+function init4dArray(root, prop, first, second, third, fourth) {
+    root[prop] = [];
+    for (var i = 0; i < first; i++) {
+        root[prop].push([]);
+    }
+
+    for(var i = 0; i < root[prop].length; i++) {
+        for (var j = 0; j < second; j++) {
+            root[prop][i].push([])
+        }
+
+        for (var x = 0; x < root[prop][i].length; x++) {
+            for (var y = 0; y < third; y++) {
+                var a = [];
+                for (var z = 0; z < fourth; z++) {
+                    a.push(0);
+                }
+                root[prop][i][x].push(a);
+            }
+        }
+    }
+}
+
+function concatTypedArrays(a, b) { // a, b TypedArray of same type
+    var c = new (a.constructor)(a.length + b.length);
+    c.set(a, 0);
+    c.set(b, a.length);
+    return c;
+}
+
+function concatBuffers(a, b) {
+    return concatTypedArrays(
+        new Uint8Array((!!a ? a.buffer : new ArrayBuffer(0)) || a),
+        new Uint8Array((!!b ? b.buffer : new ArrayBuffer(0)) || b)
+    ).buffer;
+}
+
+function concatBytes(ui8a, byte) {
+    var b = new Uint8Array(1);
+    b[0] = byte;
+    return concatTypedArrays(ui8a, b);
+}
+
+function len(v) {
+    if (typeof(v) === 'object') {
+        return v.length;
+    }
+    return 0;
+}
+
+exports = {
+    init2dArray: init2dArray,
+    init3dArray: init3dArray,
+    init4dArray: init4dArray,
+    concatTypedArrays: concatTypedArrays,
+    concatBuffers: concatBuffers,
+    concatBytes: concatBytes,
+    len: len,
+
+    string: {
+        bin: function (v) {
+            return parseInt(v);
+        }
+    },
+
+    number: {
+        bin: function (v) {
+            var sign = (v < 0 ? "-" : "");
+            var result = Math.abs(v).toString(2);
+            while(result.length < 32) {
+                result = "0" + result;
+            }
+            return sign + result;
+        }
+    }
+};