Added impl of empty sampled

media/src/main/java/ca/phon/media/EmptySampled.java

@@ -0,0 +1,127 @@
+package ca.phon.media;
+
+import ca.phon.audio.Sampled;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+/**
+ * Empty audio samples of specified length and format.
+ *
+ */
+public class EmptySampled implements Sampled {
+
+	private float length;
+
+	private int numChannels;
+
+	private float sampleRate;
+
+	public EmptySampled(int numChannels, float sampleRate, float length) {
+		this.numChannels = numChannels;
+		this.sampleRate = sampleRate;
+		this.length = length;
+	}
+
+	@Override
+	public int getNumberOfChannels() {
+		return this.numChannels;
+	}
+
+	@Override
+	public float getSampleRate() {
+		return this.sampleRate;
+	}
+
+	@Override
+	public int getNumberOfSamples() {
+		return (int)Math.ceil(getSampleRate() * getLength());
+	}
+
+	@Override
+	public double valueForSample(int channel, int sample) {
+		return 0.0;
+	}
+
+	@Override
+	public int sampleForTime(float time) {
+		final double frameRate = getSampleRate();
+		final int sampleIdx = (int)Math.round(frameRate * time);
+		return sampleIdx;
+	}
+
+	@Override
+	public double valueForTime(int channel, float time) {
+		return 0.0;
+	}
+
+	@Override
+	public float getStartTime() {
+		return 0.0f;
+	}
+
+	@Override
+	public float getEndTime() {
+		return this.length;
+	}
+
+	@Override
+	public float getLength() {
+		return this.length;
+	}
+
+	public void close() throws IOException {}
+
+	@Override
+	public double maximumValue(int channel, int firstSample, int lastSample) {
+		return 0.0;
+	}
+
+	@Override
+	public double maximumValue(int channel, float startTime, float endTime) {
+		return 0.0;
+	}
+
+	@Override
+	public double minimumValue(int channel, int firstSample, int lastSample) {
+		return 0.0;
+	}
+
+	@Override
+	public int loadSampleData(double[][] buffer, int offset, int firstSample, int numSamples) {
+		for(int i = 0;  i < buffer.length; i++)
+			Arrays.fill(buffer[i], 0.0);
+		return numSamples;
+	}
+
+	@Override
+	public double[][] getWindowExtrema(int firstSample, int lastSample) {
+		return new double[0][];
+	}
+
+	@Override
+	public double[][] getWindowExtrema(float startTime, float endTime) {
+		return new double[0][];
+	}
+
+	@Override
+	public double[] getWindowExtrema(int channel, int firstSample, int lastSample) {
+		return new double[0];
+	}
+
+	@Override
+	public void getWindowExtrema(int channel, int firstSample, int lastSample, double[] extrema) {
+		Arrays.fill(extrema, 0.0);
+	}
+
+	@Override
+	public double[] getWindowExtrema(int channel, float startTime, float endTime) {
+		return new double[0];
+	}
+
+	@Override
+	public void getWindowExtrema(int channel, float startTime, float endTime, double[] extrema) {
+		Arrays.fill(extrema, 0.0);
+	}
+
+}