448 lines
21 KiB
C#
448 lines
21 KiB
C#
using LibAudioVisualizer;
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using NAudio.CoreAudioApi;
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using NAudio.Dsp;
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using NAudio.Wave;
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using SharpDX;
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using SharpDX.Direct2D1;
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using SharpDX.Mathematics.Interop;
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using System;
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using System.Linq;
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using System.Numerics;
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using System.Windows.Forms;
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namespace AudioVisualizerDx {
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public partial class MainWindow : Form {
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WasapiCapture capture; // 音频捕获
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Visualizer visualizer; // 可视化
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double[]? spectrumData; // 频谱数据
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RawColor4[] allColors; // 渐变颜色
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Factory fac;
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RenderTarget rt;
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public MainWindow() {
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capture = new WasapiLoopbackCapture(); // 捕获电脑发出的声音
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visualizer = new Visualizer(256); // 新建一个可视化器, 并使用 256 个采样进行傅里叶变换
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allColors = GetAllHsvColors(); // 获取所有的渐变颜色 (HSV 颜色)
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capture.WaveFormat = WaveFormat.CreateIeeeFloatWaveFormat(8192, 1); // 指定捕获的格式, 单声道, 32位深度, IeeeFloat 编码, 8192采样率
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capture.DataAvailable += Capture_DataAvailable; // 订阅事件
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InitializeComponent();
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fac = new Factory();
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rt = new WindowRenderTarget(fac,
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new RenderTargetProperties(
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new PixelFormat(SharpDX.DXGI.Format.R8G8B8A8_UNorm, AlphaMode.Ignore)),
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new HwndRenderTargetProperties() {
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Hwnd = drawingPanel.Handle,
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PixelSize = new Size2(drawingPanel.Width, drawingPanel.Height),
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PresentOptions = PresentOptions.None,
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});
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}
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/// <summary>
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/// 获取 HSV 中所有的基础颜色 (饱和度和明度均为最大值)
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/// </summary>
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/// <returns>所有的 HSV 基础颜色(共 256 * 6 个, 并且随着索引增加, 颜色也会渐变)</returns>
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private RawColor4[] GetAllHsvColors() {
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RawColor4[] result = new RawColor4[256 * 6];
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for (int i = 0; i < 256; i++) {
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result[i] = new RawColor4(1, i / 255f, 0, 1);
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}
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for (int i = 0; i < 256; i++) {
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result[256 + i] = new RawColor4((255 - i) / 255f, 1, 0, 1);
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}
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for (int i = 0; i < 256; i++) {
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result[512 + i] = new RawColor4(0, 1, i / 255f, 1);
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}
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for (int i = 0; i < 256; i++) {
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result[768 + i] = new RawColor4(0, (255 - i) / 255f, 1, 1);
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}
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for (int i = 0; i < 256; i++) {
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result[1024 + i] = new RawColor4(i / 255f, 0, 1, 1);
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}
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for (int i = 0; i < 256; i++) {
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result[1280 + i] = new RawColor4(1, 0, (255 - i) / 255f, 1);
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}
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return result;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void Capture_DataAvailable(object? sender, WaveInEventArgs e) {
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int length = e.BytesRecorded / 4; // 采样的数量 (每一个采样是 4 字节)
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double[] result = new double[length]; // 声明结果
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for (int i = 0; i < length; i++)
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result[i] = BitConverter.ToSingle(e.Buffer, i * 4); // 取出采样值
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visualizer.PushSampleData(result); // 将新的采样存储到 可视化器 中
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}
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/// <summary>
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/// 用来刷新频谱数据
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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private void DataTimer_Tick(object? sender, EventArgs e) {
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double[] newSpectrumData = visualizer.GetSpectrumData(""); // 从可视化器中获取频谱数据
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newSpectrumData = Visualizer.MakeSmooth(newSpectrumData, 2); // 平滑频谱数据
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spectrumData = newSpectrumData;
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}
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/// <summary>
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/// 绘制一个渐变的 波浪
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/// </summary>
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/// <param name="g">绘图目标</param>
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/// <param name="down">下方颜色</param>
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/// <param name="up">上方颜色</param>
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/// <param name="spectrumData">频谱数据</param>
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/// <param name="pointCount">波浪中, 点的数量</param>
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/// <param name="drawingWidth">波浪的宽度</param>
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/// <param name="xOffset">波浪的起始X坐标</param>
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/// <param name="yOffset">波浪的其实Y坐标</param>
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/// <param name="scale">频谱的缩放(使用负值可以翻转波浪)</param>
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private void DrawGradient(RenderTarget g, RawColor4 down, RawColor4 up, double[] spectrumData, int pointCount, int drawingWidth, float xOffset, float yOffset, double scale) {
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RawVector2[] points = new RawVector2[pointCount + 2];
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for (int i = 0; i < pointCount; i++) {
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double x = i * drawingWidth / pointCount + xOffset;
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double y = spectrumData[i * spectrumData.Length / pointCount] * scale + yOffset;
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points[i + 1] = new RawVector2((float)x, (float)y);
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}
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points[0] = new RawVector2(xOffset, yOffset);
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points[points.Length - 1] = new RawVector2(xOffset + drawingWidth, yOffset);
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using PathGeometry geo = new PathGeometry(fac);
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using GeometrySink sink = geo.Open();
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sink.BeginFigure(points[0], FigureBegin.Filled);
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for (int i = 1; i < points.Length; i++)
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sink.AddLine(points[i]);
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sink.EndFigure(FigureEnd.Closed);
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float upP = (float)points.Min(v => v.Y);
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if (Math.Abs(upP - yOffset) < 1)
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return;
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LinearGradientBrushProperties linearGradientBrushProperties = new LinearGradientBrushProperties() { StartPoint = new RawVector2(0, yOffset), EndPoint = new RawVector2(0, upP) };
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using GradientStopCollection gradientStopCollection =
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new GradientStopCollection(rt, new GradientStop[] { new GradientStop() { Position = 0, Color = down }, new GradientStop() { Position = 1, Color = up } });
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using LinearGradientBrush brush = new LinearGradientBrush(rt, linearGradientBrushProperties, gradientStopCollection);
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g.FillGeometry(geo, brush);
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}
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/// <summary>
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/// 绘制渐变的条形
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/// </summary>
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/// <param name="g">绘图目标</param>
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/// <param name="down">下方颜色</param>
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/// <param name="up">上方颜色</param>
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/// <param name="spectrumData">频谱数据</param>
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/// <param name="stripCount">条形的数量</param>
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/// <param name="drawingWidth">绘图的宽度</param>
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/// <param name="xOffset">绘图的起始 X 坐标</param>
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/// <param name="yOffset">绘图的起始 Y 坐标</param>
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/// <param name="spacing">条形与条形之间的间隔(像素)</param>
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/// <param name="scale"></param>
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private void DrawGradientStrips(RenderTarget g, RawColor4 down, RawColor4 up, double[] spectrumData, int stripCount, int drawingWidth, float xOffset, float yOffset, float spacing, double scale) {
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float stripWidth = (drawingWidth - spacing * stripCount) / stripCount;
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RawVector2[] points = new RawVector2[stripCount];
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for (int i = 0; i < stripCount; i++) {
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double x = stripWidth * i + spacing * i + xOffset;
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double y = spectrumData[i * spectrumData.Length / stripCount] * scale; // height
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points[i] = new RawVector2((float)x, (float)y);
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}
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float upP = (float)points.Min(v => v.Y < 0 ? yOffset + v.Y : yOffset);
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float downP = (float)points.Max(v => v.Y < 0 ? yOffset : yOffset + v.Y);
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if (downP < yOffset)
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downP = yOffset;
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if (Math.Abs(upP - downP) < 1)
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return;
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LinearGradientBrushProperties linearGradientBrushProperties = new LinearGradientBrushProperties() { StartPoint = new RawVector2(0, downP), EndPoint = new RawVector2(0, upP) };
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using GradientStopCollection gradientStopCollection =
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new GradientStopCollection(rt, new GradientStop[] { new GradientStop() { Position = 0, Color = down }, new GradientStop() { Position = 1, Color = up } });
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using Brush brush = new LinearGradientBrush(rt, linearGradientBrushProperties, gradientStopCollection);
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for (int i = 0; i < stripCount; i++) {
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RawVector2 p = points[i];
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float y = yOffset;
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float height = p.Y;
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if (height < 0) {
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y += height;
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height = -height;
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}
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g.FillRectangle(new RawRectangleF(p.X, y, p.X + stripWidth, y + height), brush);
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}
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}
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/// <summary>
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/// 画曲线
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/// </summary>
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/// <param name="g"></param>
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/// <param name="brush"></param>
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/// <param name="spectrumData"></param>
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/// <param name="pointCount"></param>
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/// <param name="drawingWidth"></param>
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/// <param name="xOffset"></param>
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/// <param name="yOffset"></param>
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/// <param name="scale"></param>
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private void DrawCurve(RenderTarget g, Brush brush, double[] spectrumData, int pointCount, int drawingWidth, double xOffset, double yOffset, double scale) {
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RawVector2[] points = new RawVector2[pointCount];
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for (int i = 0; i < pointCount; i++) {
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double x = i * drawingWidth / pointCount + xOffset;
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double y = spectrumData[i * spectrumData.Length / pointCount] * scale + yOffset;
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points[i] = new RawVector2((float)x, (float)y);
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}
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using PathGeometry geo = new PathGeometry(fac);
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using GeometrySink sink = geo.Open();
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sink.BeginFigure(points[0], FigureBegin.Filled);
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for (int i = 1; i < pointCount; i++)
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sink.AddLine(points[i]);
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sink.EndFigure(FigureEnd.Open);
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sink.Close();
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g.DrawGeometry(geo, brush);
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}
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private void DrawCircleStrips(RenderTarget g, Brush brush, double[] spectrumData, int stripCount, double xOffset, double yOffset, double radius, double spacing, double rotation, double scale) {
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double rotationAngle = Math.PI / 180 * rotation;
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double blockWidth = MathF.PI * 2 / stripCount; // angle
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double stripWidth = blockWidth - MathF.PI / 180 * spacing; // angle
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RawVector2[] points = new RawVector2[stripCount];
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for (int i = 0; i < stripCount; i++) {
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double x = blockWidth * i + rotationAngle; // angle
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double y = spectrumData[i * spectrumData.Length / stripCount] * scale; // height
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points[i] = new RawVector2((float)x, (float)y);
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}
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for (int i = 0; i < stripCount; i++) {
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RawVector2 p = points[i];
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double sinStart = Math.Sin(p.X);
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double sinEnd = Math.Sin(p.X + stripWidth);
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double cosStart = Math.Cos(p.X);
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double cosEnd = Math.Cos(p.X + stripWidth);
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RawVector2 p0 = new RawVector2((float)(cosStart * radius + xOffset), (float)(sinStart * radius + yOffset));
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RawVector2 p1 = new RawVector2((float)(cosEnd * radius + xOffset), (float)(sinEnd * radius + yOffset));
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RawVector2 p2 = new RawVector2((float)(cosEnd * (radius + p.Y) + xOffset), (float)(sinEnd * (radius + p.Y) + yOffset));
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RawVector2 p3 = new RawVector2((float)(cosStart * (radius + p.Y) + xOffset), (float)(sinStart * (radius + p.Y) + yOffset));
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using PathGeometry geo = new PathGeometry(fac);
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using GeometrySink sink = geo.Open();
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sink.BeginFigure(p0, FigureBegin.Filled);
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sink.AddLine(p1);
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sink.AddLine(p2);
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sink.AddLine(p3);
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sink.EndFigure(FigureEnd.Closed);
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sink.Close();
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g.FillGeometry(geo, brush);
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}
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}
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/// <summary>
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/// 画圆环条
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/// </summary>
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/// <param name="g"></param>
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/// <param name="inner"></param>
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/// <param name="outer"></param>
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/// <param name="spectrumData"></param>
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/// <param name="stripCount"></param>
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/// <param name="xOffset"></param>
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/// <param name="yOffset"></param>
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/// <param name="radius"></param>
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/// <param name="spacing"></param>
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/// <param name="scale"></param>
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private void DrawCircleGradientStrips(RenderTarget g, RawColor4 inner, RawColor4 outer, double[] spectrumData, int stripCount, double xOffset, double yOffset, double radius, double spacing, double rotation, double scale) {
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double rotationAngle = Math.PI / 180 * rotation;
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double blockWidth = Math.PI * 2 / stripCount; // angle
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double stripWidth = blockWidth - MathF.PI / 180 * spacing; // angle
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RawVector2[] points = new RawVector2[stripCount];
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for (int i = 0; i < stripCount; i++) {
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double x = blockWidth * i + rotationAngle; // angle
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double y = spectrumData[i * spectrumData.Length / stripCount] * scale; // height
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points[i] = new RawVector2((float)x, (float)y);
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}
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double maxHeight = points.Max(v => v.Y);
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double outerRadius = radius + maxHeight;
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using GradientStopCollection gradientStopCollection = new GradientStopCollection(rt, new GradientStop[]
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{
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new GradientStop() { Position = 0, Color = inner },
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new GradientStop() { Position = 1, Color = outer }
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});
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RawVector2[] polygon = new RawVector2[4];
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for (int i = 0; i < stripCount; i++) {
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RawVector2 p = points[i];
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double sinStart = Math.Sin(p.X);
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double sinEnd = Math.Sin(p.X + stripWidth);
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double cosStart = Math.Cos(p.X);
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double cosEnd = Math.Cos(p.X + stripWidth);
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RawVector2
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p0 = new RawVector2((float)(cosStart * radius + xOffset), (float)(sinStart * radius + yOffset)),
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p1 = new RawVector2((float)(cosEnd * radius + xOffset), (float)(sinEnd * radius + yOffset)),
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p2 = new RawVector2((float)(cosEnd * (radius + p.Y) + xOffset), (float)(sinEnd * (radius + p.Y) + yOffset)),
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p3 = new RawVector2((float)(cosStart * (radius + p.Y) + xOffset), (float)(sinStart * (radius + p.Y) + yOffset));
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polygon[0] = p0;
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polygon[1] = p1;
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polygon[2] = p2;
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polygon[3] = p3;
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RawVector2 innerP = new RawVector2((p0.X + p1.X) / 2, (p0.Y + p1.Y) / 2);
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RawVector2 outerP = new RawVector2((p2.X + p3.X) / 2, (p2.Y + p3.Y) / 2);
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Vector2 offset = new Vector2(outerP.X - innerP.X, outerP.Y - innerP.Y);
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if (MathF.Sqrt(offset.X * offset.X + offset.Y * offset.Y) < 3)
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continue;
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using PathGeometry geo = new PathGeometry(fac);
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using GeometrySink sink = geo.Open();
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sink.BeginFigure(p0, FigureBegin.Filled);
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sink.AddLine(p1);
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sink.AddLine(p2);
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sink.AddLine(p3);
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sink.EndFigure(FigureEnd.Closed);
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sink.Close();
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LinearGradientBrushProperties linearGradientBrushProperties =
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new LinearGradientBrushProperties() { StartPoint = innerP, EndPoint = outerP };
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using LinearGradientBrush brush = new LinearGradientBrush(rt,
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linearGradientBrushProperties, gradientStopCollection);
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g.FillGeometry(geo, brush);
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brush.Dispose();
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}
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}
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private void DrawStrips(RenderTarget g, Brush brush, double[] spectrumData, int stripCount, int drawingWidth, float xOffset, float yOffset, float spacing, double scale) {
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float stripWidth = (drawingWidth - spacing * stripCount) / stripCount;
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RawVector2[] points = new RawVector2[stripCount];
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for (int i = 0; i < stripCount; i++) {
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double x = stripWidth * i + spacing * i + xOffset;
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double y = spectrumData[i * spectrumData.Length / stripCount] * scale; // height
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points[i] = new RawVector2((float)x, (float)y);
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}
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for (int i = 0; i < stripCount; i++) {
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RawVector2 p = points[i];
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float y = yOffset;
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float height = p.Y;
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if (height < 0) {
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y += height;
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height = -height;
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}
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g.FillRectangle(new RawRectangleF(p.X, y, p.X + stripWidth, y + height), brush);
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}
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}
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private void DrawGradientBorder(RenderTarget g, RawColor4 inner, RawColor4 outer, RawRectangleF area, double scale, float width) {
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int thickness = (int)(width * scale);
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RawRectangleF rect = new RawRectangleF(area.Left, area.Top, area.Right, area.Bottom);
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RawRectangleF up = new RawRectangleF(rect.Left, rect.Top, rect.Right, rect.Top + thickness);
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RawRectangleF down = new RawRectangleF(rect.Left, rect.Bottom - thickness, rect.Right, rect.Bottom);
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RawRectangleF left = new RawRectangleF(rect.Left, rect.Top, rect.Left + thickness, rect.Bottom);
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RawRectangleF right = new RawRectangleF(rect.Right - thickness, rect.Top, rect.Right, rect.Bottom);
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using GradientStopCollection gradientStopCollection = new GradientStopCollection(rt, new GradientStop[]
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{
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new GradientStop() { Position = 0, Color = inner },
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new GradientStop() { Position = 1, Color = outer }
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});
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using LinearGradientBrush upB = new LinearGradientBrush(rt,
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new LinearGradientBrushProperties() { StartPoint = new RawVector2(up.Left, up.Bottom), EndPoint = new RawVector2(up.Left, up.Top) }, gradientStopCollection);
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using LinearGradientBrush downB = new LinearGradientBrush(rt,
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new LinearGradientBrushProperties() { StartPoint = new RawVector2(down.Left, down.Top), EndPoint = new RawVector2(down.Left, down.Bottom) }, gradientStopCollection);
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using LinearGradientBrush leftB = new LinearGradientBrush(rt,
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new LinearGradientBrushProperties() { StartPoint = new RawVector2(left.Right, left.Top), EndPoint = new RawVector2(left.Left, left.Top) }, gradientStopCollection);
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using LinearGradientBrush rightB = new LinearGradientBrush(rt,
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new LinearGradientBrushProperties() { StartPoint = new RawVector2(right.Left, right.Top), EndPoint = new RawVector2(right.Right, right.Top) }, gradientStopCollection);
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g.FillRectangle(up, upB);
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g.FillRectangle(down, downB);
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g.FillRectangle(left, leftB);
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g.FillRectangle(right, rightB);
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}
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int colorIndex = 0;
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double rotation = 0;
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private void DrawingTimer_Tick(object? sender, EventArgs e) {
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if (spectrumData == null)
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return;
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rotation += .1;
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colorIndex++;
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RawColor4 color1 = allColors[colorIndex % allColors.Length];
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RawColor4 color2 = allColors[(colorIndex + 200) % allColors.Length];
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double[] bassArea = Visualizer.TakeSpectrumOfFrequency(spectrumData, capture.WaveFormat.SampleRate, 250);
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double bassScale = bassArea.Average() * 100;
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double extraScale = Math.Min(drawingPanel.Width, drawingPanel.Height) / 6;
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RawRectangleF border = new RawRectangleF(0, 0, drawingPanel.Width, drawingPanel.Height);
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using SolidColorBrush sampleBrush = new SolidColorBrush(rt, new RawColor4(238 / 255f, 130 / 255f, 238 / 255f, 1));
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rt.BeginDraw();
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rt.Clear(new RawColor4(0, 0, 0, 1));
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//rt.FillRectangle(border, new SolidColorBrush(rt, new RawColor4(0, 0, 0, 0.1f)));
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DrawGradientBorder(rt, new RawColor4(color1.R, color1.G, color1.B, 0), color2, border, bassScale, drawingPanel.Width / 10);
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DrawGradientStrips(rt, color1, color2, spectrumData, spectrumData.Length, drawingPanel.Width, 0, drawingPanel.Height, 3, -drawingPanel.Height * 10);
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DrawCircleGradientStrips(rt, color1, color2, spectrumData, spectrumData.Length, drawingPanel.Width / 2, drawingPanel.Height / 2, MathF.Min(drawingPanel.Width, drawingPanel.Height) / 4 + extraScale * bassScale, 1, rotation, drawingPanel.Width / 6 * 10);
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DrawCurve(rt, sampleBrush, visualizer.SampleData, visualizer.SampleData.Length, drawingPanel.Width, 0, drawingPanel.Height / 2, MathF.Min(drawingPanel.Height / 10, 100));
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rt.EndDraw();
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}
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private void MainWindow_Load(object sender, EventArgs e) {
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capture.StartRecording();
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dataTimer.Start();
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|
drawingTimer.Start();
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}
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private void MainWindow_FormClosed(object sender, FormClosedEventArgs e) {
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Environment.Exit(0);
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}
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}
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} |