Adding missing gain class

src/dsp/gain/NonClippingGain.java

@@ -0,0 +1,65 @@
+package dsp.gain;
+
+import sample.real.RealBuffer;
+
+public class NonClippingGain
+{
+	private float mGain;
+	private float mMaxValue;
+	
+	/**
+	 * Applies a fixed gain value to the float samples.
+	 * 
+	 * @param gain value
+	 * @param maxValue max absolute value to prevent clipping ( 0.0 to 1.0 )
+	 */
+	public NonClippingGain( float gain, float maxValue )
+	{
+		mGain = gain;
+		mMaxValue = maxValue;
+	}
+
+	/**
+	 * Applies gain to the sample
+	 */
+	public float apply( float sample )
+	{
+		float adjusted = sample * mGain;
+
+		if( adjusted > mMaxValue )
+		{
+			adjusted = mMaxValue;
+		}
+		if( adjusted < -mMaxValue )
+		{
+			adjusted = -mMaxValue;
+		}
+		
+		return adjusted;
+	}
+
+	/**
+	 * Applies gain to the sample array
+	 */
+	public float[] apply( float[] samples )
+	{
+		for( int x = 0; x < samples.length; x++ )
+		{
+			samples[ x ] = apply( samples[ x ]);
+		}
+		
+		return samples;
+	}
+
+	/**
+	 * Applies gain to the real buffer
+	 */
+	public RealBuffer apply( RealBuffer buffer )
+	{
+		float[] samples = buffer.getSamples();
+		
+		apply( samples );
+		
+		return buffer;
+	}
+}