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package com.pheelicks.visualizer;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.media.audiofx.Visualizer;
import android.util.AttributeSet;
import android.view.View;
import com.pheelicks.visualizer.renderer.BarGraphRenderer;
import com.pheelicks.visualizer.renderer.CircleRenderer;
import com.pheelicks.visualizer.renderer.LineRenderer;
/**
* A class that draws visualizations of data received from a
* {@link Visualizer.OnDataCaptureListener#onWaveFormDataCapture } and
* {@link Visualizer.OnDataCaptureListener#onFftDataCapture }
*/
public class VisualizerView extends View {
private static final String TAG = "VisualizerView";
private byte[] mBytes;
private byte[] mFFTBytes;
private Rect mRect = new Rect();
private Paint mFlashPaint = new Paint();
private Paint mFadePaint = new Paint();
public VisualizerView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs);
init();
}
public VisualizerView(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public VisualizerView(Context context)
{
this(context, null, 0);
}
private void init() {
mBytes = null;
mFFTBytes = null;
mFlashPaint.setColor(Color.argb(122, 255, 255, 255));
mFadePaint.setColor(Color.argb(238, 255, 255, 255)); // Adjust alpha to change how quickly the image fades
mFadePaint.setXfermode(new PorterDuffXfermode(Mode.MULTIPLY));
}
/**
* Pass data to the visualizer. Typically this will be obtained from the
* Android Visualizer.OnDataCaptureListener call back. See
* {@link Visualizer.OnDataCaptureListener#onWaveFormDataCapture }
* @param bytes
*/
public void updateVisualizer(byte[] bytes) {
mBytes = bytes;
invalidate();
}
/**
* Pass FFT data to the visualizer. Typically this will be obtained from the
* Android Visualizer.OnDataCaptureListener call back. See
* {@link Visualizer.OnDataCaptureListener#onFftDataCapture }
* @param bytes
*/
public void updateVisualizerFFT(byte[] bytes) {
mFFTBytes = bytes;
invalidate();
}
boolean mFlash = false;
/**
* Call this to make the visualizer flash. Useful for flashing at the start
* of a song/loop etc...
*/
public void flash() {
mFlash = true;
invalidate();
}
Bitmap mCanvasBitmap;
Canvas mCanvas;
BarGraphRenderer mBarGraphRendererTop;
BarGraphRenderer mBarGraphRendererBottom;
CircleRenderer mCircleRenderer;
LineRenderer mLineRenderer;
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// Create canvas & renderers once we're ready to draw
mRect.set(0, 0, getWidth(), getHeight());
if(mCanvasBitmap == null)
{
mCanvasBitmap = Bitmap.createBitmap(canvas.getWidth(), canvas.getHeight(), Config.ARGB_8888);
}
if(mCanvas == null)
{
mCanvas = new Canvas(mCanvasBitmap);
// Now that we have a Canvas, can create Renderers
Paint paint = new Paint();
paint.setStrokeWidth(50f);
paint.setAntiAlias(true);
paint.setColor(Color.argb(200, 233, 0, 44));
mBarGraphRendererBottom = new BarGraphRenderer(mCanvas, 16, paint, false);
Paint paint2 = new Paint();
paint2.setStrokeWidth(12f);
paint2.setAntiAlias(true);
paint2.setColor(Color.argb(200, 11, 111, 233));
mBarGraphRendererTop = new BarGraphRenderer(mCanvas, 4, paint2, true);
Paint paint3 = new Paint();
paint3.setStrokeWidth(3f);
paint3.setAntiAlias(true);
paint3.setColor(Color.argb(255, 222, 92, 143));
mCircleRenderer = new CircleRenderer(mCanvas, paint3, true);
Paint linePaint = new Paint();
linePaint.setStrokeWidth(1f);
linePaint.setAntiAlias(true);
linePaint.setColor(Color.argb(88, 0, 128, 255));
Paint lineFlashPaint = new Paint();
lineFlashPaint.setStrokeWidth(5f);
lineFlashPaint.setAntiAlias(true);
lineFlashPaint.setColor(Color.argb(188, 255, 255, 255));
mLineRenderer = new LineRenderer(mCanvas, linePaint, lineFlashPaint, true);
}
if (mBytes != null) {
// Render all audio renderers
AudioData audioData = new AudioData(mBytes);
mCircleRenderer.render(audioData, mRect);
mLineRenderer.render(audioData, mRect);
}
if (mFFTBytes != null) {
// Render all FFT renderers
FFTData fftData = new FFTData(mFFTBytes);
mBarGraphRendererTop.render(fftData, mRect);
mBarGraphRendererBottom.render(fftData, mRect);
}
// Fade out old contents
mCanvas.drawPaint(mFadePaint);
if(mFlash)
{
mFlash = false;
mCanvas.drawPaint(mFlashPaint);
}
canvas.drawBitmap(mCanvasBitmap, new Matrix(), null);
}
}
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