From a9ffb6b044ec077ecd855e870e6825fff11de86c Mon Sep 17 00:00:00 2001
From: "Raybz@Raybz" <Raybz@Raybz>
Date: Thu, 13 Jun 2013 11:50:47 +0200
Subject: [PATCH] improved sample helper (normalization is now possible)

---
 .../org/wyrez/audio/util/SampleHelper.java    | 22 ++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/AudioProcessing/src/main/java/org/wyrez/audio/util/SampleHelper.java b/AudioProcessing/src/main/java/org/wyrez/audio/util/SampleHelper.java
index eb06f8e..85e77e1 100644
--- a/AudioProcessing/src/main/java/org/wyrez/audio/util/SampleHelper.java
+++ b/AudioProcessing/src/main/java/org/wyrez/audio/util/SampleHelper.java
@@ -100,11 +100,31 @@ public class SampleHelper {
 
     /**
      * Creates a SampleBuffer from the data provided by the given decoder.
-     * 
+     *
      * @param deocder The decoder to read from
      * @returns The new SampleBuffer
      */
     public static SampleBuffer createSampleBuffer(Decoder decoder) {
         return new SampleBuffer(readAllSamples(decoder), decoder.getSamplingRate());
     }
+
+    /**
+     * Normalizes a given float array.
+     *
+     * @param data The float array to normalize
+     * @param lowScale The lower bound of the normalized array
+     * @param highScale The higher bound of the normalized array
+     */
+    public static void normalize(float[] data, float lowScale, float highScale) {
+        float minValue = Float.MAX_VALUE;
+        float maxValue = Float.MIN_VALUE;
+        for (float f : data) {
+            minValue = Math.min(minValue, f);
+            maxValue = Math.max(maxValue, f);
+        }
+
+        for (int i = 0; i < data.length; i++) {
+            data[i] = lowScale + (data[i] - minValue) * (highScale - lowScale) / (maxValue - minValue);
+        }
+    }
 }