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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.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.DashPathEffect;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import com.cyanogenmod.eleven.R;
import com.pheelicks.visualizer.AudioData;
import com.pheelicks.visualizer.FFTData;
import com.pheelicks.visualizer.VisualizerView;
import com.pheelicks.visualizer.renderer.Renderer;
public class EqualizerView extends VisualizerView {
private boolean mLinked = false;
private boolean mVisible = false;
private boolean mPlaying = false;
private boolean mEnabled = false;
private int mColor;
private TileBarGraphRenderer mBarRenderer;
private ObjectAnimator mVisualizerColorAnimator;
private final Runnable mLinkVisualizer = new Runnable() {
@Override
public void run() {
if (!mLinked) {
link(0);
animate().alpha(1f).setDuration(300);
mLinked = true;
}
}
};
private final Runnable mUnlinkVisualizer = new Runnable() {
@Override
public void run() {
if (mLinked) {
animate().alpha(0f).setDuration(300);
unlink();
mLinked = false;
}
}
};
private static class TileBarGraphRenderer extends Renderer {
private int mDivisions;
private Paint mPaint;
private int mDbFuzz;
private int mDbFuzzFactor;
/**
* Renders the FFT data as a series of lines, in histogram form
*
* @param divisions - must be a power of 2. Controls how many lines to draw
* @param paint - Paint to draw lines with
* @param dbfuzz - final dB display adjustment
* @param dbFactor - dbfuzz is multiplied by dbFactor.
*/
public TileBarGraphRenderer(int divisions, Paint paint, int dbfuzz, int dbFactor) {
super();
mDivisions = divisions;
mPaint = paint;
mDbFuzz = dbfuzz;
mDbFuzzFactor = dbFactor;
}
@Override
public void onRender(Canvas canvas, AudioData data, Rect rect) {
// Do nothing, we only display FFT data
}
@Override
public void onRender(Canvas canvas, FFTData data, Rect rect) {
for (int i = 0; i < data.bytes.length / mDivisions; i++) {
mFFTPoints[i * 4] = i * 4 * mDivisions;
mFFTPoints[i * 4 + 2] = i * 4 * mDivisions;
byte rfk = data.bytes[mDivisions * i];
byte ifk = data.bytes[mDivisions * i + 1];
float magnitude = (rfk * rfk + ifk * ifk);
int dbValue = magnitude > 0 ? (int) (10 * Math.log10(magnitude)) : 0;
mFFTPoints[i * 4 + 1] = rect.height();
mFFTPoints[i * 4 + 3] = rect.height() - (dbValue * mDbFuzzFactor + mDbFuzz);
}
canvas.drawLines(mFFTPoints, mPaint);
}
}
public EqualizerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public EqualizerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public EqualizerView(Context context) {
this(context, null, 0);
}
public void initialize(Context context) {
setEnabled(false);
Resources res = mContext.getResources();
mColor = res.getColor(R.color.equalizer_fill_color);
Paint paint = new Paint();
paint.setStrokeWidth(res.getDimensionPixelSize(R.dimen.eqalizer_path_stroke_width));
paint.setAntiAlias(true);
paint.setColor(mColor);
paint.setPathEffect(new DashPathEffect(new float[]{
res.getDimensionPixelSize(R.dimen.eqalizer_path_effect_1),
res.getDimensionPixelSize(R.dimen.eqalizer_path_effect_2)
}, 0));
int bars = res.getInteger(R.integer.equalizer_divisions);
mBarRenderer = new TileBarGraphRenderer(bars, paint,
res.getInteger(R.integer.equalizer_db_fuzz),
res.getInteger(R.integer.equalizer_db_fuzz_factor));
addRenderer(mBarRenderer);
}
public void setVisible(boolean visible) {
if (mVisible != visible) {
mVisible = visible;
checkStateChanged();
}
}
public void setPlaying(boolean playing) {
if (mPlaying != playing) {
mPlaying = playing;
checkStateChanged();
}
}
public void setEnabled(boolean enabled) {
if (mEnabled != enabled) {
mEnabled = enabled;
checkStateChanged();
}
}
public void setColor(int color) {
if (mColor != color) {
mColor = color;
if (mLinked) {
if (mVisualizerColorAnimator != null) {
mVisualizerColorAnimator.cancel();
}
mVisualizerColorAnimator = ObjectAnimator.ofArgb(mBarRenderer.mPaint, "color",
mBarRenderer.mPaint.getColor(), mColor);
mVisualizerColorAnimator.setStartDelay(900);
mVisualizerColorAnimator.setDuration(1200);
mVisualizerColorAnimator.start();
} else {
mBarRenderer.mPaint.setColor(mColor);
}
}
}
private void checkStateChanged() {
if (mVisible && mPlaying && mEnabled) {
mLinkVisualizer.run();
} else {
mUnlinkVisualizer.run();
}
}
}
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