在C#中播放声音字节[]

Question

我意识到你可以用SoundPlayerC#播放声音; 但是,我希望能够使用此方法从字节数组中表示的声音中使用OS默认声音播放器播放声音.这可能吗？

Answer 1

SoundPlayer构造函数接受要播放的Stream.您可以通过创建MemoryStream从byte []获取Stream.

Answer 2

使用应用程序(例如媒体播放器)打开任何文件都需要一个文件.

因此,您需要以某种格式(例如WAV)将字节数组保存到文件中,然后将其打开:

byte[] bytes = ...
string name = Path.ChangeExtension(Path.GetRandomFileName(), ".wav");
string path = Path.Combine(Path.GetTempPath(), name);
File.WriteAllBytes(path, bytes);
Process.Start(path);

此代码将打开用户默认媒体播放器,与您在Windows资源管理器中单击它相同.

Answer 3

abatishchev有一个很好的答案，但是您不需要将字节保存到文件中然后播放文件。您可以将这些字节写入MemoryStream，然后按以下方法播放MemoryStream：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Windows.Forms;

public static void PlayBeep(UInt16 frequency, int msDuration, UInt16 volume = 16383)
{
    var mStrm = new MemoryStream();
    BinaryWriter writer = new BinaryWriter(mStrm);

    const double TAU = 2 * Math.PI;
    int formatChunkSize = 16;
    int headerSize = 8;
    short formatType = 1;
    short tracks = 1;
    int samplesPerSecond = 44100;
    short bitsPerSample = 16;
    short frameSize = (short)(tracks * ((bitsPerSample + 7) / 8));
    int bytesPerSecond = samplesPerSecond * frameSize;
    int waveSize = 4;
    int samples = (int)((decimal)samplesPerSecond * msDuration / 1000);
    int dataChunkSize = samples * frameSize;
    int fileSize = waveSize + headerSize + formatChunkSize + headerSize + dataChunkSize;
    // var encoding = new System.Text.UTF8Encoding();
    writer.Write(0x46464952); // = encoding.GetBytes("RIFF")
    writer.Write(fileSize);
    writer.Write(0x45564157); // = encoding.GetBytes("WAVE")
    writer.Write(0x20746D66); // = encoding.GetBytes("fmt ")
    writer.Write(formatChunkSize);
    writer.Write(formatType);
    writer.Write(tracks);
    writer.Write(samplesPerSecond);
    writer.Write(bytesPerSecond);
    writer.Write(frameSize);
    writer.Write(bitsPerSample);
    writer.Write(0x61746164); // = encoding.GetBytes("data")
    writer.Write(dataChunkSize);
    {
        double theta = frequency * TAU / (double)samplesPerSecond;
        // 'volume' is UInt16 with range 0 thru Uint16.MaxValue ( = 65 535)
        // we need 'amp' to have the range of 0 thru Int16.MaxValue ( = 32 767)
        double amp = volume >> 2; // so we simply set amp = volume / 2
        for (int step = 0; step < samples; step++)
        {
            short s = (short)(amp * Math.Sin(theta * (double)step));
            writer.Write(s);
        }
    }

    mStrm.Seek(0, SeekOrigin.Begin);
    new System.Media.SoundPlayer(mStrm).Play();
    writer.Close();
    mStrm.Close();
} // public static void PlayBeep(UInt16 frequency, int msDuration, UInt16 volume = 16383)

对于您的问题，此方法不需要大多数代码来创建WAV格式的字节流，但是您可以在方法末尾使用技巧，从而避免将字节保存到文件中。