1 files changed, 64 insertions, 0 deletions
diff --git a/src/com/pheelicks/visualizer/Renderer.java b/src/com/pheelicks/visualizer/Renderer.java
new file mode 100644
index 0000000..aa2a56b
--- /dev/null
+++ b/src/com/pheelicks/visualizer/Renderer.java
@@ -0,0 +1,64 @@
+package com.pheelicks.visualizer;
+
+import android.graphics.Canvas;
+import android.graphics.Rect;
+
+abstract public class Renderer
+{
+  // Canvas & Rect to render to
+  protected Canvas mCanvas;
+
+  // Have these as members, so we don't have to re-create them each time
+  protected float[] mPoints;
+  protected float[] mFFTPoints;
+  public Renderer(Canvas canvas)
+  {
+    mCanvas = canvas;
+  }
+
+  // As the display of raw/FFT audio will usually look different, subclasses
+  // will typically only implement one of the below methods
+  /**
+   * Implement this method to render the audio data onto the canvas
+   * @param data - Data to render
+   * @param rect - Rect to render into
+   */
+  abstract public void onRender(AudioData data, Rect rect);
+
+  /**
+   * Implement this method to render the FFT audio data onto the canvas
+   * @param data - Data to render
+   * @param rect - Rect to render into
+   */
+  abstract public void onRender(FFTData data, Rect rect);
+
+
+  // These methods should actually be called for rendering
+  /**
+   * Render the audio data onto the canvas
+   * @param data - Data to render
+   * @param rect - Rect to render into
+   */
+  final public void render(AudioData data, Rect rect)
+  {
+    if (mPoints == null || mPoints.length < data.bytes.length * 4) {
+      mPoints = new float[data.bytes.length * 4];
+    }
+
+    onRender(data, rect);
+  }
+
+  /**
+   * Render the FFT data onto the canvas
+   * @param data - Data to render
+   * @param rect - Rect to render into
+   */
+  final public void render(FFTData data, Rect rect)
+  {
+    if (mFFTPoints == null || mFFTPoints.length < data.bytes.length * 4) {
+      mFFTPoints = new float[data.bytes.length * 4];
+    }
+
+    onRender(data, rect);
+  }
+}