车载项目里面很多用到音乐律动就是根据音乐的响度和频率对应氛围灯的亮度和颜色让人看起来跟着音乐在闪动。本文记录了从FWK的傅里叶函数获取响度和频率的方法封装了一下工具类留着以后使用package com.demo.function.atmospherelamp.view; import android.media.audiofx.Visualizer; import com.jeremyliao.liveeventbus.LiveEventBus; import com.demo.applib.utils.LogUtils; import com.demo.baseSetting.BaseAtmosphereLampMode; import com.demo.function.atmospherelamp.model.AtmosphereLampModel; import com.demo.utils.Constant; import com.demo.utils.ConvertValueUtils; import com.demo.utils.FunctionHelper; import com.demo.vehicledatamodule.ModelManager; import java.util.Arrays; /** * Created on 2025/3/5 9:18 * * author : crazyDong * description :音乐律动模式 */ public class MusicMode extends BaseAtmosphereLampMode implements Visualizer.OnDataCaptureListener { private static final String TAG Constant.TAG_FLAG MusicMode; private Visualizer visualizer; private boolean isRegistered false; private float currentFrequency;//当前频率 private int currentLoudness;//当前响度 private int brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_3;//亮度 private boolean isStartMode false;//是否开始模式标记默认不开始 Override protected void startAction() { LogUtils.d(TAG, ---startAction--- isStartMode); if (isStartMode) { LogUtils.d(TAG, ---startAction---已经开始); return; } isStartMode true; //音乐律动开启 releaseVisualizer(); setVisualizer(); } Override protected void stopAction() { LogUtils.d(TAG, ---stopAction--- isStartMode); if (!isStartMode) { LogUtils.d(TAG, ---startAction---已经停止); return; } isStartMode false; //音乐律动关闭 releaseVisualizer(); } /** * 初始化氛围灯监听回调 */ public void setVisualizer() { LogUtils.d(TAG, setVisualizer ); if (!isRegistered) { visualizer new Visualizer(0); visualizer.setEnabled(false); visualizer.setCaptureSize(Visualizer.getCaptureSizeRange()[1]); // visualizer.setDataCaptureListener(this, Visualizer.getMaxCaptureRate() / 2, false, true); // visualizer.setDataCaptureListener(this, 500, false, true);//1000000/rate 回调时间测试时使用2000ms回调 // visualizer.setDataCaptureListener(this, 16667, false, true);//1000000/rate 回调时间实车时使用60ms visualizer.setDataCaptureListener(this, 10000, false, true);//1000000/rate 回调时间实车时使用100ms visualizer.setEnabled(true);//这个设置必须在参数设置之后表示开始采样 isRegistered true; } } //释放visualizer public void releaseVisualizer() { LogUtils.d(TAG, releaseVisualizer ); if (visualizer ! null isRegistered) { visualizer.setEnabled(false); visualizer.release(); isRegistered false; } } Override public void onWaveFormDataCapture(Visualizer visualizer, byte[] bytes, int i) { //波形回调 } Override public void onFftDataCapture(Visualizer visualizer, byte[] bytes, int samplingRate) { //fft傅里叶回调开启音乐律动律动之后即使没有音乐输出也按照最低值采样显示最低亮度和青色 //没有音乐时bytes都是0 updateLoudnessFft(bytes); updateFrequencyFft(bytes, samplingRate); } //计算响度——设置亮度 private void updateLoudnessFft(byte[] fft) { byte[] model new byte[7]; int[] freq {120, 250, 500, 1000, 1500, 2000, 6000}; int max 0; for (int i 0; i freq.length; i) { int position freq[i] * 1024 / 48000; model[i] (byte) Math.hypot(fft[position], fft[position 1]); if (model[max] model[i]) { max i; } } currentLoudness model[max]; // LogUtils.d(TAG, 当前响度 最大响度 currentLoudness); setLoudnessColor(currentLoudness); } /** * 根据响度设置亮度 * * param loudness 响度 */ private void setLoudnessColor(int loudness) { if (loudness 25) { brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_1; } else if (loudness 26 loudness 35) { brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_2; } else if (loudness 36 loudness 49) { brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_3; } else if (loudness 50 loudness 78) { brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_4; } else { brightness FunctionHelper.ATMOSPHERE_LAMP_BRIGHTNESS_5; } } //计算频率——设置颜色 private void updateFrequencyFft(byte[] fft, int samplingRate) { float[] magnitudes new float[fft.length / 2]; int max 0; for (int i 0; i magnitudes.length; i) { magnitudes[i] (float) Math.hypot(fft[2 * i], fft[2 * i 1]); if (magnitudes[max] magnitudes[i]) { max i; } } currentFrequency ConvertValueUtils.getFloat((max * samplingRate), (fft.length * 1000), 1);//下标*采样频率/采样大小 // LogUtils.d(TAG, 当前频率 currentFrequency currentFrequency); setFrequencyColor(currentFrequency); } /** * 根据频率设置颜色 * * param frequency 频率 */ private void setFrequencyColor(float frequency) { int colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_34; if (frequency 23.2) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_39; } else if (frequency 23.3 frequency 26) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_29; } else if (frequency 26.1 frequency 29.2) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_49; } else if (frequency 29.3 frequency 31.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_59; } else if (frequency 31.9 frequency 34.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_5; } else if (frequency 34.8 frequency 39) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_12; } else if (frequency 39.1 frequency 42.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_19; } else if (frequency 42.5 frequency 46.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_38; } else if (frequency 46.4 frequency 52) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_28; } else if (frequency 52.1 frequency 58.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_48; } else if (frequency 58.5 frequency 63.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_58; } else if (frequency 63.7 frequency 69.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_4; } else if (frequency 69.5 frequency 77.9) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_11; } else if (frequency 78 frequency 84.9) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_18; } else if (frequency 85 frequency 92.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_37; } else if (frequency 92.8 frequency 104) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_27; } else if (frequency 104.1 frequency 116.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_47; } else if (frequency 116.8 frequency 127.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_57; } else if (frequency 127.2 frequency 138.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_3; } else if (frequency 138.9 frequency 155.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_10; } else if (frequency 155.9 frequency 169.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_17; } else if (frequency 169.8 frequency 185.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_36; } else if (frequency 185.4 frequency 208) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_26; } else if (frequency 208.1 frequency 233.5) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_46; } else if (frequency 233.6 frequency 254.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_56; } else if (frequency 254.5 frequency 277.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_2; } else if (frequency 277.7 frequency 311.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_9; } else if (frequency 311.7 frequency 339.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_16; } else if (frequency 339.5 frequency 370.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_35; } else if (frequency 370.7 frequency 416) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_25; } else if (frequency 416.1 frequency 466.9) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_45; } else if (frequency 467 frequency 508.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_55; } else if (frequency 508.7 frequency 555.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_1; } else if (frequency 555.4 frequency 623.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_8; } else if (frequency 623.4 frequency 678.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_15; } else if (frequency 678.9 frequency 741.2) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_34; } else if (frequency 741.3 frequency 832) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_26; } else if (frequency 832.1 frequency 933.9) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_44; } else if (frequency 934 frequency 1017.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_54; } else if (frequency 1017.2 frequency 1110.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_64; } else if (frequency 1110.7 frequency 1246.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_7; } else if (frequency 1246.7 frequency 1357.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_14; } else if (frequency 1357.8 frequency 1482.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_33; } else if (frequency 1482.5 frequency 1664) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_23; } else if (frequency 1664.1 frequency 1867.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_43; } else if (frequency 1867.9 frequency 2034.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_53; } else if (frequency 2034.4 frequency 2221.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_63; } else if (frequency 2221.2 frequency 2493.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_6; } else if (frequency 2493.2 frequency 2715.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_13; } else if (frequency 2715.5 frequency 2964.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_32; } else if (frequency 2964.9 frequency 3328) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_26; } else if (frequency 3328.1 frequency 3735.5) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_42; } else if (frequency 3735.6 frequency 4068.5) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_52; } else if (frequency 4068.6 frequency 4442.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_62; } else if (frequency 4442.4 frequency 4986.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_5; } else if (frequency 4986.4 frequency 5430.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_12; } else if (frequency 5430.9 frequency 5929.7) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_31; } else if (frequency 5929.8 frequency 6655.9) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_21; } else if (frequency 6656 frequency 7471.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_41; } else if (frequency 7471.2 frequency 8137) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_51; } else if (frequency 8137.1 frequency 8884.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_61; } else if (frequency 8884.7 frequency 9972.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_4; } else if (frequency 9972.7 frequency 10861.6) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_11; } else if (frequency 10861.7 frequency 11859.4) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_30; } else if (frequency 11859.5 frequency 13311.8) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_20; } else if (frequency 13311.9 frequency 14942.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_40; } else if (frequency 14942.2 frequency 16274.1) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_50; } else if (frequency 16274.2 frequency 17769.2) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_60; } else if (frequency 17769.3 frequency 19397.2) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_3; } else if (frequency 19397.3) { colorValue FunctionHelper.ATMOSPHERE_LAMP_COLOR_10; } if (isStartMode) { AtmosphereLampHelp.getInstance().setAtmosphereColorLight(colorValue, brightness , FunctionHelper.ATMOSPHERE_CHANGE_VALUE_OFF, FunctionHelper.ATMOSPHERE_ISEEP_OFF); } } }里面有一个父类BaseAtmosphereLampMode/** * Created on 2025/3/5 9:11 * * author : crazyDong * description :氛围灯模式Base */ public abstract class BaseAtmosphereLampMode { //开始模式 protected abstract void startAction(); //停止模式 protected abstract void stopAction(); }