使用C#播放short[]或者byte[]音频

乾楠楠

已于 2024-03-12 16:51:12 修改

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文章标签： c# 开发语言

于 2024-03-12 16:46:14 首次发布

本文链接：https://blog.youkuaiyun.com/rbigbearr/article/details/136655852

本文介绍了如何通过NuGet在VisualStudio2019中安装NAudio包，然后处理short和byte类型的音频数据，包括读取txt文件、数据转换，以及自定义LoopingWaveStream类实现音频循环播放。

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一、通过Nuget安装NAudio包

开发工具：vs2019

点击Visual Studio 2019的工具->NuGet包管理器-》管理解决方案的NuGet的程序包-》浏览-》在搜索框中输入NAudio-》点击安装

二、获取short类型或者byte类型的音频数据

我的数据是一组short类型的正弦波信号，存储在txt中，如下图所示：

通过C#读取文档并存储在short数组中

string filePath = "20500Left.txt"; // txt文件路径
short[] audioData = new short[48000 * 2]; //双声道数据 
int index = 0;
// 读取txt文档并按逗号分割文本
using (StreamReader reader = new StreamReader(filePath))
{
    string line;
    while ((line = reader.ReadLine()) != null)
    {
        string[] parts = line.Split(',');
        foreach (string part in parts)
        {
            //Console.WriteLine(part);
            audioData[index] = Convert.ToInt16(part);
            index++;
        }
    }
              
}

将short变为byte类型的数据（如果本身你的音频数据就是byte类型就不需要执行下边操作）

// 将short[]音频数据转换为byte[]数据
byte[] byteData = new byte[audioData.Length * 2]; // short类型占2个字节
Buffer.BlockCopy(audioData, 0, byteData, 0, byteData.Length);

三、循环播放自己的音频数据，重写WaveStream类

主要是重写了Read这个函数，读到数据流末尾，就从开头读取。

 class LoopingWaveStream : WaveStream
    {
        private WaveStream sourceStream;

        public LoopingWaveStream(WaveStream sourceStream)
        {
            this.sourceStream = sourceStream;
        }

        public override WaveFormat WaveFormat => sourceStream.WaveFormat;

        public override long Length => sourceStream.Length;

        public override long Position
        {
            get => sourceStream.Position;
            set => sourceStream.Position = value;
        }

        public override int Read(byte[] buffer, int offset, int count)
        {
            int bytesRead = 0;

            while (bytesRead < count)
            {
                int read = sourceStream.Read(buffer, offset + bytesRead, count - bytesRead);
                if (read == 0)
                {
                    // 如果读取到末尾，重新从头开始读取
                    sourceStream.Position = 0;
                }
                bytesRead += read;
            }

            return bytesRead;
        }
    }

将上边的byte类型的数据转换为Stream类型，并填入WaveOut对象中，进行播放

 // 创建内存流
            using (MemoryStream stream = new MemoryStream(byteData))
            {
                // 从内存流中创建RawSourceWaveStream   //采样率设置为48000，位深设置位16位，通道为双声道
                RawSourceWaveStream rawStream = new RawSourceWaveStream(stream, new WaveFormat(48000, 16, 2));
                LoopingWaveStream loopingWaveStream=new LoopingWaveStream(rawStream); 
                // 使用WaveOutEvent播放音频数据
                WaveOut waveOut = new WaveOut();
                waveOut.Init(loopingWaveStream);//想要循环播放
                //waveOut.Init(rawStream);      //不想要循环播放
                waveOut.Play();

                //下边两种方式的循环播放会有爆音，不采用。
                //waveOut.PlaybackStopped += (sender, e) =>
                //   {
                //       if (waveOut.PlaybackState == PlaybackState.Stopped)
                //       {
                //           rawStream.Position = 0;
                //           waveOut.Play();
                //       }
                //   };
                //while (waveOut.PlaybackState == PlaybackState.Playing)
                //{
                //    if (rawStream.Position >= rawStream.Length)
                //    {
                //        rawStream.Position = 0;
                //        //Console.WriteLine("Audio stream reached the end.");
                //        //break;
                //    }                    
                //}

                Console.WriteLine("Press Enter to stop playback.");
                Console.ReadLine();   //阻塞线程

                waveOut.Stop();  //停止播放
                waveOut.Dispose();
            }

四、完整代码：

using NAudio.Wave;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Media;
using System.Text;
using System.Threading.Tasks;

namespace 播放short
{
    class LoopingWaveStream : WaveStream
    {
        private WaveStream sourceStream;

        public LoopingWaveStream(WaveStream sourceStream)
        {
            this.sourceStream = sourceStream;
        }

        public override WaveFormat WaveFormat => sourceStream.WaveFormat;

        public override long Length => sourceStream.Length;

        public override long Position
        {
            get => sourceStream.Position;
            set => sourceStream.Position = value;
        }

        public override int Read(byte[] buffer, int offset, int count)
        {
            int bytesRead = 0;

            while (bytesRead < count)
            {
                int read = sourceStream.Read(buffer, offset + bytesRead, count - bytesRead);
                if (read == 0)
                {
                    // 如果读取到末尾，重新从头开始读取
                    sourceStream.Position = 0;
                }
                bytesRead += read;
            }

            return bytesRead;
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("开始");

            string filePath = "20500Left.txt"; // txt文件路径
            short[] audioData = new short[48000 * 2]; //双声道数据 
            int index = 0;
            // 读取txt文档并按逗号分割文本
            using (StreamReader reader = new StreamReader(filePath))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    string[] parts = line.Split(',');
                    foreach (string part in parts)
                    {
                        //Console.WriteLine(part);
                        audioData[index] = Convert.ToInt16(part);
                        index++;
                    }
                }
              
            }
            // 将short[]音频数据转换为byte[]数据
            byte[] byteData = new byte[audioData.Length * 2]; // short类型占2个字节
            Buffer.BlockCopy(audioData, 0, byteData, 0, byteData.Length);
            //////////////////////////////////方式1///////////////////////////////////
            
            // 创建内存流
            using (MemoryStream stream = new MemoryStream(byteData))
            {
                // 从内存流中创建RawSourceWaveStream   //采样率设置为48000，位深设置位16位，通道为双声道
                RawSourceWaveStream rawStream = new RawSourceWaveStream(stream, new WaveFormat(48000, 16, 2));
                LoopingWaveStream loopingWaveStream=new LoopingWaveStream(rawStream); 
                // 使用WaveOutEvent播放音频数据
                WaveOut waveOut = new WaveOut();
                waveOut.Init(loopingWaveStream);//想要循环播放
                //waveOut.Init(rawStream);      //不想要循环播放
                waveOut.Play();

                //下边两种方式的循环播放会有爆音，不采用。
                //waveOut.PlaybackStopped += (sender, e) =>
                //   {
                //       if (waveOut.PlaybackState == PlaybackState.Stopped)
                //       {
                //           rawStream.Position = 0;
                //           waveOut.Play();
                //       }
                //   };
                //while (waveOut.PlaybackState == PlaybackState.Playing)
                //{
                //    if (rawStream.Position >= rawStream.Length)
                //    {
                //        rawStream.Position = 0;
                //        //Console.WriteLine("Audio stream reached the end.");
                //        //break;
                //    }                    
                //}

                Console.WriteLine("Press Enter to stop playback.");
                Console.ReadLine();   //阻塞线程

                waveOut.Stop();  //停止播放
                waveOut.Dispose();
            }


        }
    }
}