Initial code check in continued

src/buffer/FloatCircularAveragingBuffer2.java

@@ -0,0 +1,68 @@
+/*******************************************************************************
+ *     SDR Trunk 
+ *     Copyright (C) 2014 Dennis Sheirer
+ * 
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ * 
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ * 
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>
+ ******************************************************************************/
+package buffer;
+
+import java.util.Arrays;
+
+/**
+ * Circular sample buffer - stores samples in a circular buffer
+ * overwriting older samples with newly arrived samples.  Initially
+ * fills buffer with 0-valued samples
+ * 
+ * Continuously calculates the average of the samples in the buffer, with the
+ * average available from the average() method.
+ */
+public class FloatCircularAveragingBuffer2
+{
+	private float[] mBuffer;
+	private int mBufferPointer = 0;
+	private float mAverage = 0.0f;
+	
+	public FloatCircularAveragingBuffer2( int size )
+	{
+		mBuffer = new float[ size ];
+		Arrays.fill( mBuffer, 0.0f );
+	}
+	
+	/**
+	 * Loads the newest sample into the buffer and returns the oldest sample
+	 */
+	public float get( float newestSample )
+	{
+		float oldestSample = mBuffer[ mBufferPointer ];
+		
+		mBuffer[ mBufferPointer ] = newestSample;
+
+		mBufferPointer++;
+		
+		if( mBufferPointer >= mBuffer.length )
+		{
+			mBufferPointer = 0;
+		}
+		
+		mAverage = mAverage - ( oldestSample / mBuffer.length ) + 
+							  ( newestSample / mBuffer.length );
+
+		return oldestSample;
+	}
+
+	public float average()
+	{
+		return mAverage;
+	}
+}