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/*
* Copyright (C) 2014 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cyanogenmod.eleven.widgets;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.media.audiofx.Visualizer;
import android.os.AsyncTask;
import android.util.AttributeSet;
import android.view.View;
import com.cyanogenmod.eleven.R;
public class VisualizerView extends View {
private Paint mPaint;
private Visualizer mVisualizer;
private ObjectAnimator mVisualizerColorAnimator;
private ValueAnimator[] mValueAnimators = new ValueAnimator[32];
private float[] mFFTPoints = new float[128];
private boolean mVisible = false;
private boolean mPlaying = false;
private boolean mPowerSaveMode = false;
private int mColor;
private Visualizer.OnDataCaptureListener mVisualizerListener =
new Visualizer.OnDataCaptureListener() {
byte rfk, ifk;
int dbValue;
float magnitude;
@Override
public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes, int samplingRate) {
}
@Override
public void onFftDataCapture(Visualizer visualizer, byte[] fft, int samplingRate) {
for (int i = 0; i < 32; i++) {
mValueAnimators[i].cancel();
rfk = fft[i * 2 + 2];
ifk = fft[i * 2 + 3];
magnitude = rfk * rfk + ifk * ifk;
dbValue = magnitude > 0 ? (int) (10 * Math.log10(magnitude)) : 0;
mValueAnimators[i].setFloatValues(mFFTPoints[i * 4 + 1],
mFFTPoints[3] - (dbValue * 16f));
mValueAnimators[i].start();
}
}
};
private final Runnable mLinkVisualizer = new Runnable() {
@Override
public void run() {
try {
mVisualizer = new Visualizer(0);
} catch (Exception e) {
return;
}
mVisualizer.setEnabled(false);
mVisualizer.setCaptureSize(66);
mVisualizer.setDataCaptureListener(mVisualizerListener, Visualizer.getMaxCaptureRate(),
false, true);
mVisualizer.setEnabled(true);
}
};
private final Runnable mUnlinkVisualizer = new Runnable() {
@Override
public void run() {
mVisualizer.setEnabled(false);
mVisualizer.release();
mVisualizer = null;
}
};
public VisualizerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public VisualizerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public VisualizerView(Context context) {
this(context, null, 0);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int size = Math.min(getMeasuredWidth(), getMeasuredHeight());
setMeasuredDimension(size, size);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
float barUnit = w / 32f;
float barWidth = barUnit * 8f / 9f;
barUnit = barWidth + (barUnit - barWidth) * 32f / 31f;
mPaint.setStrokeWidth(barWidth);
for (int i = 0; i < 32; i++) {
mFFTPoints[i * 4] = mFFTPoints[i * 4 + 2] = i * barUnit + (barWidth / 2);
mFFTPoints[i * 4 + 3] = h;
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mVisualizer != null) {
canvas.drawLines(mFFTPoints, mPaint);
}
}
public void initialize(Context context) {
mColor = context.getResources().getColor(R.color.visualizer_fill_color);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setColor(mColor);
for (int i = 0; i < 32; i++) {
final int j = i * 4 + 1;
mValueAnimators[i] = new ValueAnimator();
mValueAnimators[i].setDuration(128);
mValueAnimators[i].addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mFFTPoints[j] = (float) animation.getAnimatedValue();
}
});
}
mValueAnimators[31].addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
postInvalidate();
}
});
}
public void setVisible(boolean visible) {
if (mVisible != visible) {
mVisible = visible;
checkStateChanged();
}
}
public void setPlaying(boolean playing) {
if (mPlaying != playing) {
mPlaying = playing;
checkStateChanged();
}
}
public void setPowerSaveMode(boolean powerSaveMode) {
if (mPowerSaveMode != powerSaveMode) {
mPowerSaveMode = powerSaveMode;
checkStateChanged();
}
}
public void setColor(int color) {
color = Color.argb(191, Color.red(color), Color.green(color), Color.blue(color));
if (mColor != color) {
mColor = color;
if (mVisualizer != null) {
if (mVisualizerColorAnimator != null) {
mVisualizerColorAnimator.cancel();
}
mVisualizerColorAnimator = ObjectAnimator.ofArgb(mPaint, "color",
mPaint.getColor(), mColor);
mVisualizerColorAnimator.setStartDelay(600);
mVisualizerColorAnimator.setDuration(1200);
mVisualizerColorAnimator.start();
} else {
mPaint.setColor(mColor);
}
}
}
private void checkStateChanged() {
if (mVisible && mPlaying && !mPowerSaveMode) {
if (mVisualizer == null) {
AsyncTask.execute(mLinkVisualizer);
animate().alpha(1f).setDuration(300);
}
} else {
if (mVisualizer != null) {
animate().alpha(0f).setDuration(0);
AsyncTask.execute(mUnlinkVisualizer);
}
}
}
}
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